JP6698894B2 - Laminated paper, laminated paper manufacturing method, and laminated paper manufacturing apparatus - Google Patents

Laminated paper, laminated paper manufacturing method, and laminated paper manufacturing apparatus Download PDF

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JP6698894B2
JP6698894B2 JP2019022153A JP2019022153A JP6698894B2 JP 6698894 B2 JP6698894 B2 JP 6698894B2 JP 2019022153 A JP2019022153 A JP 2019022153A JP 2019022153 A JP2019022153 A JP 2019022153A JP 6698894 B2 JP6698894 B2 JP 6698894B2
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crepe
sealing
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文男 角田
文男 角田
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角田紙業株式会社
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Description

本発明は、紙おしぼり、手拭き、体拭き、ペーパタオル等に使用可能な積層紙、その積層紙の製造方法、及び、その積層紙の製造装置に関し、特に、クレープ紙と熱融着性シートを積層して熱融着する積層紙、その積層紙の製造方法、及び、その積層紙の製造装置に関するものである。   The present invention relates to laminated paper that can be used for hand towels, hand wipes, body wipes, paper towels, etc., a method for producing the laminated paper, and an apparatus for producing the laminated paper, and in particular, a crepe paper and a heat-fusible sheet. The present invention relates to a laminated paper that is laminated and heat-sealed, a method for manufacturing the laminated paper, and an apparatus for manufacturing the laminated paper.

従来の紙おしぼり等に使用可能な積層紙に関する発明として、本発明者の発明乃至考案に係る特許文献1に係る発明、及び、特許文献2に係る発明がある。これらの発明では、クレープを有する吸湿紙と熱融着性シート(合成繊維を混抄した吸湿紙または不織布)とを積層して、吸湿紙のクレープと略直交する方向に延びるようヒートセット部乃至ヒートシール部を形成し、それらを熱融着して一体化している。これらの発明は、肌触りが良く、外観及び使用感にも優れた積層紙を提供することができ、また、積層紙のヒートシールを低温で行うことができ、加工が容易になり、製造コストを低減することができる。   As an invention relating to a laminated paper that can be used for a conventional paper towel, there are an invention related to Patent Document 1 according to the present invention or an invention, and an invention related to Patent Document 2. In these inventions, a hygroscopic paper having a crepe and a heat-fusible sheet (a hygroscopic paper or a non-woven fabric mixed with synthetic fibers) are laminated, and a heat setting part or a heat setting part is formed so as to extend in a direction substantially orthogonal to the crepe of the hygroscopic paper. The seal portion is formed, and they are heat-fused and integrated. These inventions can provide a laminated paper which is good in touch and excellent in appearance and usability, and can heat-seal the laminated paper at a low temperature, which facilitates the processing and reduces the manufacturing cost. It can be reduced.

また、上記のような優れた効果を有する従来の積層紙を更に改良した本発明者の発明として、特許文献3に記載の発明及び特許文献4に記載の発明がある。これらの発明は、特に、クレープ紙及び熱融着性シートのヒートシール部の融着強度を大幅に向上し、かつ、全体のボリューム感を増大して外観を更に向上して積層紙を提供することができる。即ち、これらの発明に係る積層紙は、融着面積を少なくしても十分な融着強度を得ることができ、全体のボリューム感も増大することができる。   Further, as the inventions of the present inventors who have further improved the conventional laminated paper having the excellent effects as described above, there are the invention described in Patent Document 3 and the invention described in Patent Document 4. These inventions, in particular, provide a laminated paper in which the fusion bonding strength of the heat-sealed portion of the crepe paper and the heat-fusible sheet is significantly improved, and the overall volume feeling is increased to further improve the appearance. be able to. That is, the laminated papers according to these inventions can obtain sufficient fusing strength even if the fusing area is reduced, and the overall volume feeling can be increased.

特公平4−24480号公報Japanese Patent Publication No. 4-24480 実公平4−15116号公報Japanese Utility Model Publication No. 4-15116 特開平11−342090号公報JP-A-11-342090 特開2003−39581号公報JP, 2003-39581, A

上記特許文献1〜特許文献4の発明は、いずれも、積層紙を紙おしぼり等に具体化した場合に、その肌触りや外観や使用感を大幅に向上することができ、また、積層紙を構成する吸湿紙と熱融着性シートとの間の融着強度を大幅に向上し、かつ、全体のボリューム感を大幅に増大することができるという、主に機能に関する効果を発揮しており、商品としての大きな利点をもたらすものである。一方、本発明者は、素材としての積層紙を紙おしぼり等の最終製品へと加工する過程で、或いは、加工した後の段階で、従来の積層紙に対して更に付加価値の高い機能を付与することに着想し、また、積層紙としての性能を従来よりも飛躍的に向上できる新規な積層紙及びその製造方法について模索した。そして、本発明者は、このように付加価値の高い機能を備え、また、従来よりも性能を飛躍的に向上した積層紙、その積層紙を製造するための製造方法、並びに、その積層紙を製造するための製造装置、或いは、その製造方法で使用する製造装置について研究開発を継続し、試行錯誤を重ねた結果、本発明に相当した。   All of the inventions of Patent Documents 1 to 4 described above can significantly improve the touch, appearance and usability of the laminated paper when the laminated paper is embodied in a paper towel, etc. The adhesive strength between the hygroscopic paper and the heat-fusible sheet is significantly improved, and the overall volume feeling can be significantly increased, which is mainly related to the function. As a result, it brings great advantages. On the other hand, the present inventor has added a function with higher added value to the conventional laminated paper in the process of processing the laminated paper as a material into a final product such as a paper towel, or in the stage after the processing. Based on the idea, the inventors have sought a new laminated paper that can dramatically improve the performance as a laminated paper and a manufacturing method thereof. Then, the inventor of the present invention provides a laminated paper having such a high value-added function and dramatically improved in performance as compared with the conventional one, a production method for producing the laminated paper, and the laminated paper. The present invention corresponds to the present invention as a result of continuing research and development on a manufacturing apparatus for manufacturing or a manufacturing apparatus used in the manufacturing method and repeating trial and error.

即ち、本発明は、付加価値の高い機能を備え、また、従来よりも性能を飛躍的に向上した積層紙、積層紙の製造方法、及び、積層紙の製造装置の提供を課題とする。   That is, an object of the present invention is to provide a laminated paper, a laminated paper manufacturing method, and a laminated paper manufacturing apparatus that have functions with high added value and have dramatically improved performance as compared with conventional ones.

本発明の第1の観点に係る積層紙は、一対の外層シートとしてのクレープ紙と、前記一対のクレープ紙の間に積層状態で配設される熱融着性の中間層シートとしての不織布とからなり、前記クレープ紙のクレープ皺の延びる方向と直交する方向に延びる線状の熱融着部列により、前記クレープ紙を前記中間層シートに熱融着して積層構造とし、前記クレープ紙のクレープ率は、20%〜30%の範囲内に設定すると共に、前記熱融着部列の幅方向の熱融着部間隔は、10mm〜25mmの範囲内に設定し、前記幅方向の熱融着部間隔の範囲内で、前記クレープ紙のクレープ率の増加に比例して前記幅方向の熱融着部間隔を増加する。   The laminated paper according to the first aspect of the present invention includes a pair of outer layer sheets of crepe paper, and a nonwoven fabric as a heat-fusible intermediate layer sheet arranged in a laminated state between the pair of crepe papers. Consisting of a linear heat-sealing portion row extending in a direction orthogonal to the direction in which the crepe wrinkles of the crepe paper extend, to form a laminated structure by heat-sealing the crepe paper to the intermediate layer sheet, The crepe ratio is set in the range of 20% to 30%, and the width of the heat-sealing portion in the width direction of the heat-sealing portion is set in the range of 10 mm to 25 mm. Within the range of the distance between the welding portions, the distance between the heat-sealing portions in the width direction is increased in proportion to the increase in the crepe ratio of the crepe paper.

本発明の第2の観点に係る積層紙は、一対の外層シートとしてのクレープ紙と、前記一対のクレープ紙の間に積層状態で配設される熱融着性の中間層シートとしての不織布とからなり、前記クレープ紙のクレープ皺の延びる方向と直交する方向に延びる線状の熱融着部列により、前記クレープ紙を前記中間層シートに熱融着して積層構造とし、前記クレープ紙のクレープ率が20%〜26%の範囲内の場合、前記熱融着部列の幅方向の熱融着部間隔は、10mm〜15mmの範囲内に設定し、前記クレープ紙のクレープ率が26%〜30%の範囲内の場合、前記熱融着部列の幅方向の熱融着部間隔は、15〜25mmの範囲内に設定し、前記幅方向の熱融着部間隔の範囲内で、前記クレープ紙のクレープ率の増加に比例して前記幅方向の熱融着部間隔を増加する。   A laminated paper according to a second aspect of the present invention is a crepe paper as a pair of outer layer sheets, and a nonwoven fabric as a heat-fusible intermediate layer sheet arranged in a laminated state between the pair of crepe papers. Consisting of a linear heat-sealing portion row extending in a direction orthogonal to the direction in which the crepe wrinkles of the crepe paper extend, to form a laminated structure by heat-sealing the crepe paper to the intermediate layer sheet, When the crepe rate is in the range of 20% to 26%, the width of the heat-sealing section in the width direction of the heat-sealing section is set in the range of 10 mm to 15 mm, and the crepe rate of the crepe paper is 26%. In the range of 30% to 30%, the width of the heat-sealing portion of the heat-sealing portion row is set within the range of 15 to 25 mm, and within the range of the width of the heat-sealing portion, The distance between the heat-sealing portions in the width direction is increased in proportion to the increase in the crepe rate of the crepe paper.

本発明の積層紙、積層紙の製造方法、及び、積層紙の製造装置によれば、付加価値の高い機能を備え、また、従来よりも性能を飛躍的に向上した積層紙を提供することができる。   INDUSTRIAL APPLICABILITY According to the laminated paper, the laminated paper manufacturing method, and the laminated paper manufacturing apparatus of the present invention, it is possible to provide a laminated paper that has a high value-added function and that has dramatically improved performance over conventional ones. it can.

図1は本発明の実施の形態1に係る積層紙(印刷部を有する積層紙)の第1の具体例(模様部を有する積層紙)を示す平面図である。FIG. 1 is a plan view showing a first specific example (laminated paper having a pattern portion) of laminated paper (laminated paper having a printing portion) according to Embodiment 1 of the present invention. 図2は本発明の実施の形態1に係る積層紙を図1のA−A線で切り取った部分で拡大して示す平面図であり、(a)は実施の形態1に係る積層紙の乾燥状態を示し、(b)は実施の形態1に係る積層紙の含水時の膨潤状態を示す。FIG. 2 is a plan view showing the laminated paper according to the first embodiment of the present invention in an enlarged manner at the portion cut along the line AA in FIG. 1, and FIG. 2A is the drying of the laminated paper according to the first embodiment. 3B shows a state, and FIG. 3B shows a swollen state of the laminated paper according to Embodiment 1 when it contains water. 図3は本発明の実施の形態1に係る積層紙の第2の具体例(広告部を有する積層紙)を示す平面図である。FIG. 3 is a plan view showing a second specific example (laminated paper having an advertising section) of the laminated paper according to Embodiment 1 of the present invention. 図4は本発明の実施の形態1に係る積層紙を示す側面図である。FIG. 4 is a side view showing the laminated paper according to the first embodiment of the present invention. 図5は本発明の実施の形態1に係る積層紙を横方向に切断して示す断面図であり、一点鎖線の円内に印刷層を設けた部位を拡大して示す。FIG. 5 is a cross-sectional view of the laminated paper according to the first embodiment of the present invention cut in the lateral direction, showing an enlarged portion of a portion where a printing layer is provided within a circle of a one-dot chain line. 図6は本発明の実施の形態2に係る積層紙(印刷部を有する積層紙)を横方向に切断して示す断面図であり、一点鎖線で示す円形部分(印刷層を設けた部分)を拡大して示す。FIG. 6 is a cross-sectional view showing a laminated paper according to Embodiment 2 of the present invention (laminated paper having a printing portion) in a horizontal direction, and a circular portion (a portion provided with a printing layer) indicated by a chain line is shown. Enlarged view. 図7は本発明の実施の形態3に係る積層紙(複数層の中間層シートを有する積層紙)を横方向に切断して示す拡大断面図である。FIG. 7 is an enlarged cross-sectional view showing a laminated paper (a laminated paper having a plurality of intermediate layer sheets) according to the third embodiment of the present invention by cutting it in the lateral direction. 図8は本発明の実施の形態4に係る積層紙(非透水性中間層シートを有する積層紙)を横方向に切断して示す拡大断面図である。FIG. 8 is an enlarged cross-sectional view showing a laminated paper (a laminated paper having a water-impermeable intermediate layer sheet) according to Embodiment 4 of the present invention by cutting it in the lateral direction. 図9は本発明の実施の形態5に係る積層紙の製造装置(ヒートシールローラー型積層紙製造装置)を概略的に示す側面図である。FIG. 9 is a side view schematically showing a laminated paper manufacturing apparatus (heat seal roller type laminated paper manufacturing apparatus) according to Embodiment 5 of the present invention. 図10は本発明の実施の形態5に係る積層紙の製造装置のヒートシールローラを概略的に示す側面図であり、線状熱圧着凸部の説明のため一点鎖線で示す円形部分を拡大して示す。FIG. 10 is a side view schematically showing a heat-sealing roller of a laminated paper manufacturing apparatus according to Embodiment 5 of the present invention, in which a circular portion indicated by a chain line is enlarged to explain a linear thermocompression-bonding convex portion. Indicate. 図11は本発明の実施の形態5に係る積層紙の製造装置を線状熱融着部の形成工程を説明するための説明図であり、ヒートシールローラ部分を側面視により示す説明図である。FIG. 11 is an explanatory view for explaining a process for forming a linear heat-sealing portion in the laminated paper manufacturing apparatus according to the fifth embodiment of the present invention, and is an explanatory view showing a heat seal roller portion in a side view. . 図12は本発明の実施の形態5に係る積層紙の製造装置を線状熱融着部の形成工程を説明するための説明図であり、図11に対応するヒートシールローラを端面で切断してその内部構造を断面にて示す説明図である。FIG. 12 is an explanatory diagram for explaining a process for forming a linear heat-sealing portion in the laminated paper manufacturing apparatus according to the fifth embodiment of the present invention. The heat-sealing roller corresponding to FIG. 11 is cut at the end face. It is explanatory drawing which shows the internal structure in a cross section. 図13は本発明の実施の形態5に係る積層紙の製造装置のヒートシールローラの線状熱圧着凸部の構成を示す説明図であり、上側の図は一対のヒートシールローラの一部を示す斜視図であり、中央の図は一対のヒートシールローラの線状熱圧着凸部が互いに噛合して積層紙の原料シートを圧接する状態を説明するため上側の図の一点鎖線で示す円形部分を拡大した上で横断面として示す断面図であり、下側の図は一対のヒートシールローラの線状熱圧着凸部の形状を説明するため中央の図の中央側の一点鎖線で示す円形部分を拡大して示す断面図である。FIG. 13 is an explanatory view showing the configuration of the linear thermocompression-bonding convex portion of the heat seal roller of the laminated paper manufacturing apparatus according to the fifth embodiment of the present invention, and the upper diagram shows a part of the pair of heat seal rollers. FIG. 3 is a perspective view showing the center part of the circular part shown by the one-dot chain line in the upper part of the figure in order to explain the state where the linear thermocompression-bonding convex portions of the pair of heat-sealing rollers mesh with each other to press the raw material sheet of the laminated paper. Is a cross-sectional view showing an enlarged cross-section, and the lower diagram is a circular portion indicated by a one-dot chain line on the central side of the central diagram for explaining the shape of the linear thermocompression-bonding convex portions of the pair of heat-sealing rollers. It is sectional drawing which expands and shows. 図14は本発明の実施の形態1に係る積層紙において、クレープ率に応じて線状熱融着部間の幅を変更する場合の例を示し、(a)は第1のクレープ率に対応して隣接する線状熱融着部間の間隔(幅)を第1の幅とした場合を示す積層紙の一部の拡大平面図であり、(b)は第2のクレープ率に対応して隣接する線状熱融着部間の間隔(幅)を第2の幅とした場合を示す積層紙の一部の拡大平面図である。FIG. 14 shows an example in which the width between the linear heat-sealing portions is changed according to the crepe rate in the laminated paper according to the first embodiment of the present invention, and (a) corresponds to the first crepe rate. FIG. 3B is an enlarged plan view of a part of the laminated paper showing the case where the interval (width) between the adjacent linear heat-sealing portions is set to the first width, and (b) corresponds to the second crepe rate. FIG. 7 is an enlarged plan view of a part of the laminated paper showing a case where the interval (width) between the adjacent linear heat-sealing portions is set to the second width. 図15は本発明の実施の形態5に係る積層紙の製造装置を使用した積層紙の製造方法の好適な具体例を説明するためのグラフであり、(a)は積層紙の製造装置による積層紙の原料シートの送給速度と積層紙の製造装置のヒートシールローラの熱圧着温度との間の関係を示す説明図、(b)積層紙の製造装置のヒートシールローラの熱圧着温度と積層紙の原料シートの原紙の厚み(原紙厚)との間の関係を示す説明図、(c)は積層紙の製造装置による積層紙の原料シートの送給速度と積層紙の原料シートの原紙厚との間の関係を示す説明図、(d)は積層紙の製造装置のヒートシールローラの熱圧着温度と積層紙の原料シートの不織布の厚み(不織布厚)との間の関係を示す説明図である。FIG. 15 is a graph for explaining a preferred specific example of the laminated paper manufacturing method using the laminated paper manufacturing apparatus according to the fifth embodiment of the present invention, and (a) is a lamination by the laminated paper manufacturing apparatus. Explanatory drawing which shows the relationship between the feeding speed of the raw material sheet of paper, and the thermocompression-bonding temperature of the heat-sealing roller of the laminated paper manufacturing apparatus, (b) The thermocompression-bonding temperature of the heat-sealing roller of a laminated paper manufacturing apparatus, and lamination. Explanatory diagram showing the relationship between the thickness of the base paper (base paper thickness) of the raw material sheet of paper, (c) is the feed rate of the raw material sheet of the laminated paper by the laminated paper manufacturing apparatus and the base paper thickness of the raw material sheet of the laminated paper And (d) is an explanatory view showing the relationship between the thermocompression bonding temperature of the heat sealing roller of the laminated paper manufacturing apparatus and the thickness of the nonwoven fabric (nonwoven fabric thickness) of the raw material sheet of the laminated paper. Is. 図16は本発明の実施の形態6に係る積層紙の製造装置(高周波ミシン型積層紙製造装置)を概略的に示す側面図である。FIG. 16 is a side view schematically showing a laminated paper manufacturing apparatus (high frequency sewing machine type laminated paper manufacturing apparatus) according to Embodiment 6 of the present invention.

以下、本発明を実施するための形態(以下、実施の形態という)を説明する。なお、各実施の形態を通じ、同一の部材、要素または部分には同一の符号を付して、その説明を省略する。   Hereinafter, modes for carrying out the present invention (hereinafter, referred to as embodiments) will be described. Throughout the embodiments, the same members, elements or portions are designated by the same reference numerals, and the description thereof will be omitted.

実施の形態1(印刷部を不織布に設けてなる積層紙)
[積層紙の全体構成]
実施の形態1の積層紙は、図1〜図5に示すように、印刷部を有する積層紙10に具体化される。まず、積層紙10の全体構成について説明すると、図1に示すように、積層紙10の平面視(又は底面視)では、積層紙10は、所定の外形輪郭(典型的には、長方形状等の矩形状)を有するシート状に形成されている。一方、積層紙10の側面視(又は横断面視)では、図4の側面図に示すように、積層紙10は、一対の外層を構成する外層シートとしてクレープ紙1と、前記一対の外層間に介装配置される中間層を構成する中間層シートとしての不織布2とからなる積層構造を有している。また、積層紙10は、前記一対のクレープ紙1の一方及び他方を、それぞれ、不織布2の一方面及び他方面に対して同一箇所で熱融着することで、前記積層構造を維持している。即ち、積層紙10は、熱融着部列11(第1の熱融着部列11A及び第2の熱融着部列11B)をそれぞれ構成する第1の熱融着部11a及び第2の熱融着部11bの各箇所で、一対のクレープ紙1をそれぞれ不織布2に熱融着することで、一対のクレープ紙1を不織布2に対してそれぞれ同一箇所で熱融着している。
Embodiment 1 (laminated paper in which a printing portion is provided on a non-woven fabric)
[Overall structure of laminated paper]
The laminated paper according to the first embodiment is embodied as a laminated paper 10 having a printing unit, as shown in FIGS. First, the overall configuration of the laminated paper 10 will be described. As shown in FIG. 1, in a plan view (or bottom view) of the laminated paper 10, the laminated paper 10 has a predetermined outer contour (typically, a rectangular shape or the like). Rectangular shape). On the other hand, in a side view (or cross-sectional view) of the laminated paper 10, as shown in the side view of FIG. 4, the laminated paper 10 includes the crepe paper 1 as an outer layer sheet forming a pair of outer layers and the pair of outer layers. It has a laminated structure composed of a nonwoven fabric 2 as an intermediate layer sheet that constitutes an intermediate layer interposed between the two. The laminated paper 10 maintains the laminated structure by heat-sealing one and the other of the pair of crepe papers 1 to the one surface and the other surface of the non-woven fabric 2 at the same location. .. That is, the laminated paper 10 includes the first heat-bonding section 11a and the second heat-bonding section 11a and the second heat-bonding section 11B, which form the heat-bonding section row 11 (first heat-bonding section row 11A and second heat-bonding section row 11B), respectively. By heat-bonding the pair of crepe papers 1 to the nonwoven fabric 2 at each location of the heat-bonding portion 11b, the pair of crepe papers 1 is heat-bonded to the nonwoven fabric 2 at the same location.

[熱融着部]
熱融着部11について詳細に説明すると、積層紙10は、破線状をなす熱融着部列11を、積層紙10の長さ方向(製造時の原紙供給方向であって、図1中の上下方向)の全体に延びるよう形成して1列の熱融着部11列を構成している。また、積層紙10は、多数列の熱融着部列11を、一定間隔を置いて互いに平行となるよう、積層紙10の幅方向(製造時の原紙供給方向と直交する方向であって、図1中の左右方向)の全体にわたって連続的に並設配置している。これにより、積層紙10は、隣接する熱融着部列11の間に、それぞれ、直線帯状をなす非融着部12を有している。即ち、積層紙10は、多数列の非融着部12を、一定間隔を置いて互いに平行となるよう、幅方向の全体にわたって連続的に並設配置している。積層紙10において、前記多数列の熱融着部列11は、第1の熱融着部11aを積層紙10の長さ方向に一定間隔を置いて直線状に配置してなる第1の列の熱融着部列11Aと、第2の熱融着部11bを積層紙10の長さ方向に一定間隔を置いて直線状に配置してなる第2の列の熱融着部列11Bとから構成されている。即ち、第1の熱融着部11aからなる第1の列の熱融着部列11Aと、第2の熱融着部11bからなる第2の列の熱融着部列11Bとが、積層紙10の幅方向に一定間隔で交互に並設配置されている。また、図2に示すように、第1の熱融着部11aは、積層紙10において、所定長さで所定幅を有する直線線分状の融着部分を構成しており、このような一定長さで一定幅の第1の熱融着部11aを長さ方向に一定間隔で直線的に配置することにより、破線状の第1の列の熱融着部列11Aが構成される。第2の熱融着部11bは、第1の熱融着部11aと同一長さで同一幅の直線線分状の融着部分を構成しており、このような一定長さで一定幅の第2の熱融着部11bを長さ方向に一定間隔で直線的に配置することにより、第1の列の熱融着部列11Aと同様の破線状をなす第2の列の熱融着部列11Bが構成される。そして、第1の列の熱融着部列11Aの第1の熱融着部11aと、第2の列の熱融着部列11Bの第2の熱融着部11bとは(即ち、隣接する列の熱融着部列11A,11Bは)、第1の列の熱融着部列11Aの第1の熱融着部11aの長さ方向の中心位置が、第2の列の熱融着部列11Bの隣接する第2の熱融着部11bの間の間隙の中間位置にくるよう、積層紙10の長さ方向における位置を互いにずらして配置されている。
[Heat fusion part]
Explaining the heat-bonding section 11 in detail, in the laminated paper 10, the heat-bonding section row 11 having a broken line shape is formed in the length direction of the laminated paper 10 (the base paper supply direction at the time of manufacture, which is shown in FIG. 1). It is formed so as to extend over the entire length (in the vertical direction) to form one row of the heat-sealing portions 11 rows. In addition, the laminated paper 10 has a large number of rows of the heat-sealing portions 11 that are parallel to each other at regular intervals, that is, in the width direction of the laminated paper 10 (the direction orthogonal to the base paper supply direction at the time of manufacturing, They are continuously arranged side by side in the entire (left-right direction in FIG. 1). As a result, the laminated paper 10 has the non-fusing portions 12 in the form of a straight band between the adjacent heat-fusing portion rows 11. That is, in the laminated paper 10, a large number of rows of the non-fusing portions 12 are continuously arranged side by side over the entire width direction so as to be parallel to each other at regular intervals. In the laminated paper 10, the multiple rows of the heat-sealing portion 11 are first rows in which the first heat-sealing portions 11a are linearly arranged at regular intervals in the length direction of the laminated paper 10. 11A of the heat-fusion-bonding part and the second heat-fusion-bonding part 11b of the second line formed by arranging the second heat-bonding parts 11b linearly at regular intervals in the length direction of the laminated paper 10. It consists of That is, the first row of the heat-sealing section 11A including the first heat-sealing section 11a and the second row of the heat-sealing section 11B including the second heat-sealing section 11b are laminated. The sheets 10 are alternately arranged in parallel in the width direction of the paper 10. Further, as shown in FIG. 2, the first heat-fusion-bonding portion 11a constitutes a straight line-segment-shaped fusion-bonding portion having a predetermined length and a predetermined width in the laminated paper 10, and such a constant By arranging the first heat-fusion-bonding portions 11a having a constant length and a constant width in the lengthwise direction at regular intervals, the first heat-fusion-bonding portion row 11A having a dashed line is formed. The second heat-sealing portion 11b constitutes a straight line-segment-shaped heat-sealing portion having the same length and the same width as the first heat-sealing portion 11a. By arranging the second heat-sealing portions 11b linearly at regular intervals in the length direction, the heat-sealing of the second row having the same broken line shape as the heat-sealing portion row 11A of the first row is performed. An array 11B is formed. Then, the first heat-sealing portion 11a of the first heat-sealing portion row 11A and the second heat-sealing portion 11b of the second heat-sealing portion row 11B are adjacent to each other (that is, adjacent to each other). The heat-sealing portion rows 11A and 11B of the first row are the heat-sealing portion rows 11A and 11B of the first row. The positions in the length direction of the laminated paper 10 are displaced from each other so as to come to the intermediate position of the gap between the adjacent second heat-fusion-bonding parts 11b of the bonding part row 11B.

[非融着部]
図4に示すように、積層紙10は、隣接する2本の熱融着部列11間に1本の直線帯状をなす非融着部12を形成しているが、この非融着部12は、積層紙10への含水後に膨張して膨張部を構成するようになっている。詳細には、非融着部12は、図1及び図2に示すように、(積層紙10の含水後に幅広の膨張部を構成することになる)幅広膨張部12aと、(積層紙10の含水後に幅狭の膨張部を構成することになる)幅狭膨張部12bとから構成されている。より詳細には、幅広膨張部12aは、それぞれ、隣接する第1の列の熱融着部列11Aと第2の列の熱融着部列11Bとが重複しない範囲(非重複範囲)に、当該非重複範囲の長さで当該非重複範囲の幅を有する略矩形状部分として、積層紙10に設けられている。例えば、図2では、幅広膨張部12aは、左から2列目の第1の列の熱融着部列11Aの第1の熱融着部11aと、左から3列目の第2の列の熱融着部列11Bの第2の熱融着部11bとが、互いに重複していない長さ方向中間部の範囲において、この第1の列の熱融着部列11Aにおいて上下に隣接する第1の熱融着部11aの末端間(一端と他端との間)の長さ範囲で、かつ、この第1の列の熱融着部列11Aの右側縁から第2の列の熱融着部列11Bを挟んで対向する別の第1の列の熱融着部列11A(図2の場合、左から4列目の第1の列の熱融着部列11A)の左側縁までの幅範囲にわたり、略矩形状となって設けられている。一方、幅狭膨張部12bは、それぞれ、隣接する第1の列の熱融着部列11Aと第2の列の熱融着部列11Aとが重複する範囲(重複範囲)に、当該重複範囲の長さで当該重複範囲の幅を有する小さい略矩形状部分として、積層紙10に設けられている。例えば、図2では、幅狭膨張部12bは、左から2列目の第1の列の熱融着部列11Aの第1の熱融着部11aと、左から3列目の第2の列の熱融着部列11Bの第2の熱融着部11bとが、互いに重複する長さ方向端部の範囲において、第1の列の熱融着部列11Aの第1の熱融着部11aの一端(例えば、上端)から、これに隣接する第2の列の熱融着部列11Bの第2の熱融着部11bの他端(下端)までの長さ範囲で、かつ、この第1の列の熱融着部列11Aの右側縁から第2の列の熱融着部列11Bの左側縁までの幅範囲にわたり、略矩形状となって設けられている。
[Non-fusion part]
As shown in FIG. 4, the laminated paper 10 has a single non-fusing part 12 in the form of a linear band formed between two adjacent heat-fusing part rows 11. Is configured to expand after the water content of the laminated paper 10 and to form an expansion part. More specifically, as shown in FIGS. 1 and 2, the non-fusing part 12 has a wide expansion part 12 a (which forms a wide expansion part after the water content of the laminated paper 10) and a (expanded part of the laminated paper 10). After the water is contained, a narrow expanded portion will be formed) and a narrow expanded portion 12b. More specifically, the wide expansion part 12a has a range (non-overlapping range) in which the first heat-bonding part row 11A and the second heat-bonding part row 11B do not overlap, respectively. The laminated paper 10 is provided as a substantially rectangular portion having a length of the non-overlapping range and a width of the non-overlapping range. For example, in FIG. 2, the wide expansion part 12a includes the first heat-bonding part 11a of the first heat-bonding part line 11A in the second line from the left and the second line in the third line from the left. The second heat-sealing portion 11b of the first heat-sealing portion row 11B is vertically adjacent to the second heat-sealing portion row 11A of the first row in the range of the lengthwise intermediate portion which does not overlap with each other. Within the length range between the ends (between one end and the other end) of the first heat-sealing portion 11a, and the heat of the second row from the right edge of the heat-sealing portion row 11A of the first row Left side edge of another first heat fusion portion row 11A (in the case of FIG. 2, the fourth heat fusion portion row 11A of the first row) facing each other across the fusion portion row 11B. It is provided in a substantially rectangular shape over the width range up to. On the other hand, the narrow expansion part 12b is in the overlapping range (overlapping range) in which the first heat-bonding part row 11A and the second heat-bonding part row 11A overlap each other. It is provided on the laminated paper 10 as a small substantially rectangular portion having a length of the width of the overlapping range. For example, in FIG. 2, the narrow expansion portion 12b includes the first heat-sealed portion 11a of the first heat-sealed portion row 11A in the second row from the left and the second heat-sealed portion 11a in the third row from the left. In the range of the lengthwise ends where the second heat-sealing portion 11b of the heat-sealing portion row 11B overlaps the first heat-sealing portion of the heat-sealing portion row 11A of the first row. In the length range from one end (for example, the upper end) of the portion 11a to the other end (lower end) of the second heat-sealing portion 11b of the heat-sealing portion row 11B of the second row adjacent to the portion 11a, and It is provided in a substantially rectangular shape over the width range from the right side edge of the first heat fusion portion row 11A to the left side edge of the second heat fusion portion row 11B.

[非融着部(膨張部)の皺]
積層紙10において、前記非融着部12では外層のクレープ紙1と中間層の不織布2とは全く接合されておらず、クレープ紙1の非融着部12は、熱融着部列11の熱融着部11a,11bの拘束を受けない部分(即ち、不織布2に対して固着されない部分)として、不織布2に対して厚み方向等に移動して変形自在となっている。特に、非融着部12のうち熱融着部列11に近接する部分(即ち、熱融着部列11との境界部分)では、クレープ紙1の移動可能な量は相対的に小さいが、非融着部12のうち熱融着部列11からの離間量が大きい部分(即ち、隣接する熱融着部列11間の中央部分)では、クレープ紙1の移動可能な量は相対的に大きくなり、隣接する熱融着部列11間の中央位置でクレープ紙1の移動可能な量が最大となる。また、積層紙10において、両外層となるクレープ紙1の各々の非融着部12(即ち、各幅広膨張部12a及び各幅狭膨張部12b)では、それぞれ、積層紙10の初回の含水前には、クレープ紙1の本来の固有の小皺である多数のクレープ皺が表れている。このクレープ皺は、積層紙10の幅方向(及び、クレープ紙1の幅方向)に延びる小皺であり、クレープ紙1の製造時に形成されるものである。
[Wrinkles on the non-fused part (expanded part)]
In the laminated paper 10, in the non-fusing part 12, the outer layer crepe paper 1 and the intermediate layer nonwoven fabric 2 are not joined at all, and the non-fusing part 12 of the crepe paper 1 is As the portions of the heat-sealed portions 11a and 11b that are not restrained (that is, the portions that are not fixed to the nonwoven fabric 2), they can be deformed by moving in the thickness direction or the like with respect to the nonwoven fabric 2. Particularly, in the portion of the non-fusing part 12 close to the heat-fusing part row 11 (that is, the boundary portion with the heat-fusing part row 11), the movable amount of the crepe paper 1 is relatively small, In the part of the non-fusing part 12 where the distance from the heat fusing part row 11 is large (that is, the central part between the adjacent heat fusing part rows 11), the movable amount of the crepe paper 1 is relatively large. The size of the crepe paper 1 becomes large and the movable amount of the crepe paper 1 becomes the maximum at the central position between the adjacent rows of the heat-sealing portions 11. In the laminated paper 10, the non-fusing portions 12 (that is, the wide expansion portions 12a and the narrow expansion portions 12b) of the crepe paper 1 serving as both outer layers, respectively, before the first moisture absorption of the laminated paper 10. In the figure, a large number of crepe wrinkles, which are the original peculiar wrinkles of the crepe paper 1, are shown. This crepe wrinkle is a small wrinkle extending in the width direction of the laminated paper 10 (and the width direction of the crepe paper 1) and is formed when the crepe paper 1 is manufactured.

一方、積層紙10に初回の含水を行った後は、クレープ紙1の各々の非融着部12(幅広膨張部12a及び幅狭膨張部12b)では、前記クレープ紙1がクレープ皺を介して膨張することにより、即ち、小皺であるクレープ皺が水分で膨張することにより、図2に示すように、前記クレープ紙1の本来のクレープ皺とは異なる皺(クレープ皺よりも大寸法となる皺、以下、「膨張皺」という。)が形成される。この場合、クレープ紙1では、隣接する複数のクレープ皺が水分で膨張して一体化し、それら複数のクレープ皺に相当する一つの膨張皺が形成され、かつその膨張皺部分では、その膨張皺の元となったクレープ皺はその全部又は一部が消失すると考えることができる。また、このクレープ紙1の膨張皺は、前記幅広膨張部12aでは、幅広膨張部12aの幅方向の略全体に延びる大きな皺(以下、「膨張大皺」という。)となり、前記幅狭膨張部12bでは、幅狭膨張部12bの幅方向の略全体に延びる中間程度の大きさの皺(以下、「膨張中皺」という。)となり、膨張大皺及び膨張中皺のいずれも前記クレープ皺よりは大きな皺となる。なお、図14に、これらの膨張大皺12aw及び膨張中皺12bwの例を示す。更に、クレープ紙1の非融着部12では、全てのクレープ皺が前記膨張大皺又は膨張中皺に変形するわけではなく、一部のクレープ皺は、そのまま(本来の小皺の状態で)クレープ紙1に残存する。加えて、本発明者は、積層紙10において、クレープ紙1の非融着部12では、幅広膨張部12aの膨張大皺には2種類の膨張大皺が存在することに想到した。即ち、本発明者は、前記膨張大皺として、前記クレープ皺のうち一部のクレープ皺が消失することなく膨張大皺と共に残存(即ち、混在)した第1の種類の膨張大皺(以下「大小混合皺」という。)と、前記クレープ皺が完全に消失した第2の種類の膨張大皺(以下「完全大皺」という。)とが存在するとの知見を得ている。同様に、本発明者は、積層紙10において、クレープ紙1の非融着部12では、幅狭膨張部12bの膨張中皺には2種類の膨張中皺が存在することに想到した。即ち、本発明者は、前記膨張中皺として、前記クレープ皺のうち一部のクレープ皺が消失することなく膨張中皺と共に残存(即ち、混在)した第1の種類の膨張中皺(以下「中小混合皺」という。)と、クレープ皺が完全に消失した第2の種類の膨張中皺(以下「完全中皺」という。)とが存在するとの知見を得ている。更にまた、積層紙10では、クレープ紙1において、これらの膨張大皺、膨張中皺、大小混合皺、中小混合皺、完全大皺、及び、完全中皺は、含水後に積層紙10が乾燥した後でも、基本的に、そのままの状態で残存する。   On the other hand, after the first hydration of the laminated paper 10, the crepe paper 1 passes through the crepe wrinkles in each of the non-fusing parts 12 (the wide expansion part 12a and the narrow expansion part 12b) of the crepe paper 1. As the crepe wrinkles, which are small wrinkles, expand due to water due to expansion, as shown in FIG. 2, wrinkles different from the original crepe wrinkles of the crepe paper 1 (wrinkles having a larger size than the crepe wrinkles). , Hereinafter, referred to as “expansion wrinkles”). In this case, in the crepe paper 1, a plurality of adjacent crepe wrinkles are expanded by water and integrated, and one expansion wrinkle corresponding to the plurality of crepe wrinkles is formed. It can be considered that the original crepe wrinkles disappear in whole or in part. Further, the expansion creases of the crepe paper 1 become large creases (hereinafter, referred to as “expansion large creases”) that extend over substantially the entire width direction of the wide expansion part 12a in the wide expansion part 12a, and the narrow expansion part. In 12b, a wrinkle of an intermediate size that extends substantially entirely in the width direction of the narrow inflated portion 12b (hereinafter referred to as "expansion wrinkle") is formed, and both the expansion wrinkle and the expansion wrinkle are larger than the crepe wrinkle. Is a big wrinkle. Note that FIG. 14 shows an example of the large wrinkles 12aw and the middle wrinkles 12bw. Further, in the non-fusing part 12 of the crepe paper 1, not all the crepe wrinkles are transformed into the above-mentioned large wrinkles or middle wrinkles during expansion, and some crepe wrinkles remain as they are (in the original small wrinkles). It remains on paper 1. In addition, the present inventor has conceived that, in the laminated paper 10, in the non-fusing part 12 of the crepe paper 1, there are two types of expansion wrinkles in the expansion wrinkles of the wide expansion part 12a. That is, the present inventor has, as the expanded wrinkles, the first type of expanded wrinkles (hereinafter referred to as “mixed”) that remains with the expanded wrinkles without disappearing some crepe wrinkles among the crepe wrinkles. It is known that there is a large and small mixed wrinkle") and a second type of expanded wrinkle in which the crepe wrinkle is completely disappeared (hereinafter referred to as "completely large wrinkle"). Similarly, the inventor of the present invention has conceived that, in the laminated paper 10, in the non-fusing part 12 of the crepe paper 1, there are two types of expanding wrinkles in the expanding wrinkles of the narrow expanding part 12b. That is, the present inventor, as the expansion wrinkles, the first type of expansion wrinkles (hereinafter referred to as “mixed”) that remains with the expansion wrinkles without erasing some crepe wrinkles of the crepe wrinkles (hereinafter “ It has been found that there are two kinds of expanded medium wrinkles (hereinafter referred to as "complete medium wrinkles") in which crepe wrinkles are completely eliminated. Furthermore, in the laminated paper 10, in the crepe paper 1, the expanded large wrinkles, the expanded medium wrinkles, the large and small mixed wrinkles, the small and medium mixed wrinkles, the complete large wrinkles, and the complete medium wrinkles are the laminated paper 10 dried after the water content. Even afterwards, it basically remains as it is.

これにより、含水後の積層紙10では、含水時及び含水後の乾燥時の両者において、前記膨張大皺、膨張中皺、大小混合皺、中小混合皺、完全大皺、及び、完全中皺が混在し、特に、前記膨張大皺と大小混合皺と完全大皺の組、並びに、膨張中皺と中小混合皺と完全中皺の組が、前記幅広膨張部12aと幅狭膨張部12bとにそれぞれ交互に存在して、積層紙10の両面の全体にわたってバランスよくボリューム感を増大するという特有の効果を発揮する。   As a result, in the laminated paper 10 after hydration, both during hydration and during hydration after hydration, the expanded wrinkles, expanded wrinkles, large and small mixed wrinkles, small and medium mixed wrinkles, complete large wrinkles, and complete intermediate wrinkles. Mixed, in particular, the set of expanded wrinkles, large and small mixed wrinkles and complete large wrinkles, and expanded medium wrinkles, small and medium mixed wrinkles and complete medium wrinkles, in the wide expansion section 12a and the narrow expansion section 12b. The two are alternately present and have a unique effect of increasing the volume feeling in a well-balanced manner on both sides of the laminated paper 10.

[熱融着部の寸法及び熱融着部間の間隔]
積層紙10において、前記各列の熱融着部列11は、一定長さで一定幅の直線線分状の第1の熱融着部11aを長さ方向に一定間隔で破線状に配置することで構成され、また、一定長さで一定幅の直線線分状の第2の熱融着部11bを、前記第1の熱融着部11aに対して位置をずらして(即ち、各第2の熱融着部11bの中間位置が第1の熱融着部11a間の間隔の中間位置と合致するような位置にくるよう)長さ方向に一定間隔で破線状に配置することで構成されている。また、第1の熱融着部11a及び第2の熱融着部11bの長さ及び幅は、それぞれ同一に設定されているため、第1の熱融着部11a及び第2の熱融着部11bは、上記のように長さ方向に位置をずらして配置される点を除き、同一構成となる。一方、積層紙10において、第1の熱融着部11a及び第2の熱融着部11bの長さ及び幅は、所定長及び所定幅に設定されている。即ち、各第1の熱融着部11a及び各第2の熱融着部11bの長さ及び/又は幅は、積層紙10の使用時の1枚の外形寸法等に応じて適宜設定される(即ち、積層紙10の用途に応じて決定される縦寸法及び横寸法等に応じて適宜設定される)。
[Dimensions of heat-sealed parts and intervals between heat-sealed parts]
In the laminated paper 10, in each row of the heat-fusion-bonding portions 11, the first heat-fusion-bonding portions 11a of a straight line segment having a constant length and a constant width are arranged in a broken line shape at regular intervals in the length direction. In addition, the second heat-sealing portion 11b, which is a straight line segment having a constant length and a constant width, is displaced with respect to the first heat-sealing portion 11a (that is, each first heat-sealing portion 11a). 2 so that the intermediate position of the heat-sealed portion 11b is located at a position that coincides with the intermediate position of the space between the first heat-sealed parts 11a). Has been done. Moreover, since the length and the width of the first heat-sealed portion 11a and the second heat-sealed portion 11b are set to be the same, respectively, the first heat-sealed portion 11a and the second heat-sealed portion 11a. The parts 11b have the same configuration except that they are arranged at different positions in the length direction as described above. On the other hand, in the laminated paper 10, the length and width of the first heat-sealing portion 11a and the second heat-sealing portion 11b are set to a predetermined length and a predetermined width. That is, the length and/or the width of each of the first heat-sealing portions 11a and each of the second heat-sealing portions 11b are appropriately set according to the outer dimensions of one sheet when the laminated paper 10 is used. (That is, it is appropriately set according to the vertical dimension, the horizontal dimension, etc., which are determined according to the application of the laminated paper 10.)

具体的には、例えば、積層紙10を紙おしぼりの用途に使用する場合、各熱融着部11a,11bの長さは、35mm〜45mmの範囲内の任意の値に設定され、好ましくは、38mm〜42mmの範囲内の任意の値に設定され、より好ましくは、約40mmの値に設定されている。また、各熱融着部11a,11bの幅は、1.5mm〜2.5mmの範囲内の任意の値に設定され、好ましくは、約2mmの値に設定されている。そして、各熱融着部11a,11bの長さと幅の比(アスペクト比)は、13:1〜23:1の範囲内の任意の比に設定することが好ましく、約20:1に設定することが更に好ましい。即ち、各熱融着部11a,11bは、幅を長さの約5%に設定する(或いは、長さを幅の約20倍に設定する)ことが好ましい。更に、積層紙10の各列の熱融着部11において、長さ方向に隣接する熱融着部11A,11b間の間隔(以下、「長さ方向の熱融着部間隔」という。)は、18mm〜22mmの範囲内の任意の値に設定され、好ましくは、約20mmの値に設定されている。各熱融着部11a,11bの長さと熱融着部間隔の比は、2:1に設定することが好ましい。即ち、各列の熱融着部11は、長さ方向の熱融着部間隔を熱融着部11a,11bの長さの約50%に設定する(或いは、熱融着部11a,11bの長さを熱融着部間隔の約2倍に設定する)ことが好ましい。こうすると、熱融着部列11によるクレープ紙1と不織布2との一体的接合力を良好に維持する一方で、非融着部12によるクレープ1の膨張率を最大限に高め、積層紙10のボリューム感を最も良好な状態に維持することができる。   Specifically, for example, when the laminated paper 10 is used for a paper towel, the length of each heat-sealed portion 11a, 11b is set to an arbitrary value within the range of 35 mm to 45 mm, and preferably, It is set to any value within the range of 38 mm to 42 mm, and more preferably set to a value of about 40 mm. The width of each heat-sealed portion 11a, 11b is set to an arbitrary value within the range of 1.5 mm to 2.5 mm, preferably about 2 mm. Further, the length-width ratio (aspect ratio) of each heat-sealed portion 11a, 11b is preferably set to any ratio within the range of 13:1 to 23:1, and is set to about 20:1. More preferably. That is, it is preferable to set the width of each of the heat-sealed portions 11a and 11b to about 5% of the length (or set the length to about 20 times the width). Further, in the heat-sealing portions 11 of each row of the laminated paper 10, the distance between the heat-sealing portions 11A and 11b adjacent to each other in the lengthwise direction (hereinafter, referred to as "heat-sealing portion distance in the length direction"). , 18 mm to 22 mm, and is preferably set to a value of about 20 mm. It is preferable to set the ratio of the length of each heat-sealed portion 11a and 11b to the space between the heat-sealed portions to 2:1. That is, in the heat-sealing portions 11 of each row, the heat-sealing portion distance in the length direction is set to about 50% of the length of the heat-sealing portions 11a and 11b (or, of the heat-sealing portions 11a and 11b). It is preferable to set the length to about twice the distance between the heat-sealing portions). This makes it possible to maintain a good joint force between the crepe paper 1 and the non-woven fabric 2 by the heat-fusing part row 11, while maximizing the expansion rate of the crepe 1 by the non-fusing part 12, and thus the laminated paper 10 The volume feeling of can be maintained in the best condition.

[熱融着部の端部形状]
更に、各熱融着部11a,11bは、その長さ方向両端部を平面半円状の湾曲形状としている。これにより、各熱融着部の端部を矩形とする場合(即ち、端部の隅角が直角の隅角となる場合)に比べ、クレープ紙1が各熱融着部11a,11bの端部から不織布2に対して剥離することを効果的に防止することができる。また、後述するように、この場合、積層紙の製造装置において熱融着部の形成手段を構成するヒートシールローラの熱圧着凸部の熱圧着面の長さ方向両端部も、対応する平面半円状の湾曲形状となるため、各熱圧着面の端部を矩形とする場合(即ち、端部の隅角が直角の隅角となる場合)に比べ、ヒートシールローラの熱圧着面による熱融着部の形成時に熱圧着面からの押圧力を受けるクレープ紙1の原料シートが、熱圧着面の端部で過大な圧力集中を受けて破損したりすることがなく、製造歩留まりを向上したり、積層紙10の品質を向上したりすることができる。(即ち、後述するように、熱圧着面の端部が直角の隅角となる場合は、熱圧着面が湾曲形状の場合と比較して、その隅角でクレープ紙1の原料シートに応力が集中して、その隅角部分で原料シートが破損する可能性が大きくなる。)
[End shape of heat-sealed part]
Further, each of the heat-sealed portions 11a and 11b has both end portions in the length direction thereof having a curved shape of a plane semicircle. As a result, the crepe paper 1 has the ends of the heat-sealed portions 11a and 11b as compared with the case where the end portions of the heat-sealed portions are rectangular (that is, the corner angles of the end portions are right angles). It is possible to effectively prevent the non-woven fabric 2 from being peeled from the portion. Further, as will be described later, in this case, the lengthwise both ends of the thermocompression bonding surface of the thermocompression bonding convex portion of the heat sealing roller which constitutes the means for forming the heat fusion bonding portion in the laminated paper manufacturing apparatus also have corresponding flat half surfaces. Because of the circular curved shape, compared to the case where the end of each thermocompression bonding surface is rectangular (that is, when the corner angle of the end is a right angle), heat generated by the thermocompression bonding surface of the heat seal roller The raw material sheet of the crepe paper 1 which receives the pressing force from the thermocompression bonding surface at the time of forming the fused portion is not damaged by the excessive pressure concentration at the end of the thermocompression bonding surface, and the manufacturing yield is improved. Alternatively, the quality of the laminated paper 10 can be improved. (That is, as will be described later, when the end of the thermocompression bonding surface has a right angle, compared to when the thermocompression bonding surface has a curved shape, stress is applied to the raw material sheet of the crepe paper 1 at that corner angle. Concentration increases the possibility that the raw material sheet will be damaged at the corners.)

[クレープ紙のクレープ率]
積層紙10において、クレープ紙1のクレープ率は、20%〜40%の範囲内の任意の値に設定されており、好ましくは、20%〜30%の範囲内の任意の値に設定されており、より好ましくは、約30%の値に設定されている。即ち、クレープ紙1のクレープ率が20%より小さいと、不織布2に積層及び接合されて積層紙10を構成した後、積層紙10に含水したときに、クレープ紙1が十分に膨張又は膨潤しない可能性が大きい。一方、クレープ1のクレープ率が40%より大きいと、クレープ紙1の原料シートの製造時(即ち、抄紙時)に、抄紙機で原料シートを抄紙することが困難になる。
[Crepe ratio of crepe paper]
In the laminated paper 10, the crepe ratio of the crepe paper 1 is set to any value within the range of 20% to 40%, and preferably set to any value within the range of 20% to 30%. However, it is more preferably set to a value of about 30%. That is, when the crepe ratio of the crepe paper 1 is less than 20%, the crepe paper 1 does not expand or swell sufficiently when the laminated paper 10 is hydrated after being laminated and bonded to the nonwoven fabric 2 to form the laminated paper 10. There is a high possibility. On the other hand, when the crepe ratio of the crepe 1 is larger than 40%, it becomes difficult to make the raw material sheet with a paper machine at the time of manufacturing the raw material sheet of the crepe paper 1 (that is, at the time of paper making).

[クレープ紙のクレープ率と熱融着部の配置間隔]
また、図14に示すように、積層紙10において熱融着部列11の配置間隔LW1,LW2(即ち、隣接する熱融着部列11の幅方向中心線の間の間隔、以下、「幅方向の熱融着部間隔」という。)は、クレープ紙1のクレープ率の範囲に応じた所定範囲内の任意の値に設定されている。具体的には、クレープ紙1のクレープ率が20%〜26%の範囲内の値の場合、幅方向の熱融着部間隔は、(相対的に小寸法となる)第1の幅方向の熱融着部間隔LW1として、10mm〜15mmの範囲内の任意の値に設定することが好ましく(即ち、下限値を10mmとし、上限値を15mmとすることが好ましく)、また、この幅方向の熱融着部間隔の範囲内で、クレープ率の増加に比例して幅方向の熱融着部間隔を増加することが好ましい。また、クレープ紙1のクレープ率が26%〜30%の範囲内の値の場合、幅方向の熱融着部間隔は、(相対的に大寸法となる)第2の幅方向の熱融着部間隔LW2として、15〜25mmの範囲内の任意の値に設定することが好ましく(即ち、下限値を15mmとし、上限値を25mmとすることが好ましく)、また、この幅方向の熱融着部間隔の範囲内で、クレープ率の増加に比例して幅方向の熱融着部間隔を増加することが好ましい。積層紙10において幅方向の熱融着部間隔LW1,LW2が前記下限値より小さいと、積層紙10に含水したときに、クレープ紙1が十分に膨張又は膨潤しない可能性が大きい。一方、積層紙10において幅方向の熱融着部間隔LW1,LW2が前記上限値より大きいと、積層紙10への含水時に、前記膨張大皺や膨張中皺等が所期の膨張率よりも過大に膨張又は伸長して、それら膨張大皺や膨張中皺等に弛みが生じて、積層紙10の品質を低下する恐れがある。例えば、積層紙10において幅方向の熱融着部間隔LW1,LW2を30mm以上(即ち、25mmを大きく超える値、具体的には、25mmの125%以上となるような値)とすると、積層紙10への含水時に、前記膨張大皺や膨張中皺等が膨張又は伸長しすぎて弛んだ状態となることを、本発明者は実験により確認している。即ち、前記クレープ紙1のクレープ率を上記範囲の最大値である30%としても、積層紙10において幅方向の熱融着部間隔LW1,LW2を30mm以上の値とすると、積層紙10への含水時に、前記膨張大皺や膨張中皺等が膨張又は伸長しすぎて弛んだ状態となる。
[Crepe rate of crepe paper and arrangement interval of heat fusion parts]
In addition, as shown in FIG. 14, in the laminated paper 10, the arrangement intervals LW1 and LW2 of the heat-sealing portion rows 11 (that is, the distances between the center lines in the width direction of the adjacent heat-sealing portion rows 11; "The heat-sealed portion distance in the direction") is set to an arbitrary value within a predetermined range according to the range of the crepe ratio of the crepe paper 1. Specifically, when the crepe ratio of the crepe paper 1 is a value within the range of 20% to 26%, the width of the heat-sealing portion in the width direction is (relatively small) in the first width direction. It is preferable to set the heat-sealing portion distance LW1 to any value within the range of 10 mm to 15 mm (that is, it is preferable that the lower limit value is 10 mm and the upper limit value is 15 mm). It is preferable that the width of the heat-sealed portion is increased in proportion to the increase of the crepe ratio within the range of the heat-sealed portion. When the crepe ratio of the crepe paper 1 is a value within the range of 26% to 30%, the width of the heat-sealing portion in the width direction is the second heat-bonding in the width direction (which is relatively large). It is preferable to set the interval LW2 to any value within the range of 15 to 25 mm (that is, it is preferable to set the lower limit value to 15 mm and the upper limit value to 25 mm), and the heat fusion in the width direction. Within the range of the section interval, it is preferable to increase the width of the heat-sealing section in proportion to the increase in the crepe ratio. If the widths LW1 and LW2 of the heat-sealing portions in the laminated paper 10 are smaller than the lower limit value, there is a high possibility that the crepe paper 1 will not sufficiently expand or swell when the laminated paper 10 contains water. On the other hand, when the width LW1, LW2 of the heat-sealing portions in the width direction of the laminated paper 10 is larger than the upper limit value, the expanded large wrinkles, the expanded wrinkles, etc. are more than the desired expansion rate when the laminated paper 10 contains water. There is a possibility that the quality of the laminated paper 10 may be deteriorated due to excessive expansion or expansion and looseness in the expanded large wrinkles and the expanded wrinkles. For example, when the width LW1, LW2 of the heat-sealing portion in the laminated paper 10 is 30 mm or more (that is, a value that greatly exceeds 25 mm, specifically, a value that is 125% or more of 25 mm), the laminated paper The present inventor has confirmed by experiments that the large wrinkles, the middle wrinkles, and the like are inflated or expanded too much to be in a loosened state when water is contained in 10. That is, even if the crepe ratio of the crepe paper 1 is 30%, which is the maximum value in the above range, if the width LW1 and LW2 of the heat-sealing portions in the width direction of the laminated paper 10 is 30 mm or more, the laminated paper 10 has When water is contained, the large wrinkles, the middle wrinkles, and the like are expanded or extended too much to be in a loosened state.

[印刷部としての模様部]
図1に示すように、積層紙10は、印刷部の第1の具体例としての模様部13を有する積層紙10として具体化することができる。詳細には、模様部13は、例えば、図2に示すように、同一モチーフの単位模様13a,13bを積層紙10の全面又は一定範囲にわたって配設してなる構成とすることできる。図2では、例えば、単位模様13aは、所定種類の花の花冠(花弁の集合体)のモチーフで所定寸法の模様を構成している一方、単位模様13bは、単位模様13aと同一の花冠のモチーフで、単位模様13aよりも大きな寸法の模様を構成している。なお、模様部13の構成は、図2のものに限定されることなく、任意の模様を使用した構成とすることができる。即ち、模様部13は、図2の単位模様13a,13bとは異なるモチーフの単位模様を使用することもでき、また、同一モチーフの単位模様を使用したもの以外に、各種のモチーフの単位模様を組み合わせてなる任意の模様とすることもできる。或いは、模様部13は、図2のような個別の単位模様を使用した構成以外にも、格子模様、市松模様等、繰返しの絵柄からなる模様を使用した構成とすることもできる。或いは、模様部13は、積層紙10の本来の素地色(特に、クレープ紙1の素地色)と異なる任意の単色を積層紙10の全面に印刷してなる単色模様(全面単色模様)としたり、積層紙10の本来の素地色と異なる任意の単色を積層紙10の一部の範囲に印刷してなる単色模様(一部単色模様)としたりすることもできる。或いは、模様部13は、2色以上の別個の色を積層紙10の全面又は一部の範囲にランダムに印刷してなる模様(以下、「複数色模様」という。)としたりすることもできる。要するに、模様部13は、通常の積層紙10の素地色と異なる任意の色を積層紙10に印刷することで、積層紙10に別個の視覚的効果を付与できるものであれば、任意の構成とすることができる。
[The pattern part as the print part]
As shown in FIG. 1, the laminated paper 10 can be embodied as a laminated paper 10 having a pattern portion 13 as a first specific example of the printing unit. In detail, the pattern portion 13 can be configured, for example, as shown in FIG. 2, in which unit patterns 13a and 13b having the same motif are arranged on the entire surface of the laminated paper 10 or over a certain range. In FIG. 2, for example, the unit pattern 13a constitutes a pattern of a predetermined size with a motif of a flower corolla (collection of petals) of a predetermined type, while the unit pattern 13b has the same corolla as the unit pattern 13a. The motif forms a pattern having a size larger than that of the unit pattern 13a. The configuration of the pattern portion 13 is not limited to that shown in FIG. 2, and any pattern can be used. That is, the pattern portion 13 can use a unit pattern of a motif different from the unit patterns 13a and 13b of FIG. 2, and in addition to a unit pattern of the same motif, unit patterns of various motifs can be used. It is also possible to have an arbitrary pattern formed by combining them. Alternatively, the pattern portion 13 may be configured to use a pattern composed of repetitive patterns such as a lattice pattern or a checkerboard pattern, in addition to the configuration using individual unit patterns as shown in FIG. Alternatively, the pattern portion 13 may be a monochromatic pattern (entire surface monochromatic pattern) formed by printing an arbitrary single color different from the original base color of the laminated paper 10 (in particular, the base color of the crepe paper 1) on the entire surface of the laminated paper 10. Alternatively, a monochromatic pattern (partially monochromatic pattern) formed by printing an arbitrary monochromatic color different from the original base color of the laminated paper 10 on a part of the laminated paper 10 may be used. Alternatively, the pattern portion 13 may be a pattern (hereinafter, referred to as a “multicolor pattern”) formed by randomly printing two or more different colors on the entire surface or a part of the laminated paper 10. .. In short, the pattern portion 13 has any configuration as long as it can give a different visual effect to the laminated paper 10 by printing an arbitrary color different from the base color of the ordinary laminated paper 10 on the laminated paper 10. Can be

[印刷部としての広告部]
また、図3に示すように、積層紙10は、印刷部の第2の具体例としての広告部14を有する積層紙10として具体化することができる。詳細には、広告部14は、例えば、外枠14aの内側範囲に広告枠14bと広告枠14cとを有する構成とすることができる。この場合、広告部14は、例えば、広告枠14bに特定の広告内容のタイトルやコピー等を印刷し、広告枠14cにその広告内容の詳細(商品説明文や商品に対応する絵柄等)を印刷した構成とすることができる。なお、図3において、広告部14の外枠14a、広告枠14b、及び、広告枠14cは、それぞれ、破線により外形線が描画されているが、これはあくまで、外枠14a、広告枠14b、及び、広告枠14cの範囲を説明するための方便であり、(無論、それらをあえて描画することも可能であるが)通常は、積層紙10に外枠14a、広告枠14b、及び、広告枠14cの外形線が描画されることはない。また、広告部14の外枠14aも、広告内容の一例を示すために便宜上設けたものであり、外枠14aを設けることなく、全てを広告枠14a,14bとして具体化することもできる。また、広告枠14a,14bの数も、1枠としたり、2枠以上の任意の枠数としたりすることもできる。更に、広告部14の構成は、図2のものに限定されることなく、任意の構成とすることができる。即ち、広告部14は、通常のチラシや販促品等の広告用印刷媒体に印刷される広告内容であれば、任意の広告内容やコンテンツを任意の表現態様や表現形式で印刷したものとして構成することができる。また、広告部14に印刷する内容やコンテンツとしては、会社名、ロゴマーク、ブランド等、任意のものを印刷することができる。更に、印刷部を備えた積層紙10は、例えば、小売店舗のセール情報や会社のキャンペーン情報等の各種情報を告知したり広告したりする目的で大量に配布される紙おしぼり等のノベルティグッズに適用したり、オリンピックや博覧会等の各種イベント(催事)を告知したり周知させたりする目的で大量に配布される紙おしぼり等のノベルティグッズに適用したりすることもできる。
[Advertising department as printing department]
Further, as shown in FIG. 3, the laminated paper 10 can be embodied as the laminated paper 10 having the advertising unit 14 as the second specific example of the printing unit. Specifically, the advertising unit 14 can be configured to have, for example, an advertising frame 14b and an advertising frame 14c within the outer frame 14a. In this case, the advertising unit 14 prints, for example, a title or a copy of specific advertising content on the advertising frame 14b, and details of the advertising content (such as a product description or a pattern corresponding to the product) on the advertising frame 14c. It can be configured. In FIG. 3, the outer frame 14a, the advertising frame 14b, and the advertising frame 14c of the advertising unit 14 have outlines drawn by broken lines, but this is the outer frame 14a, the advertising frame 14b, and And, it is a convenient way to explain the range of the advertisement frame 14c, and (of course, it is also possible to intentionally draw them) that the laminated frame 10 usually has the outer frame 14a, the advertisement frame 14b, and the advertisement frame. The outline of 14c is not drawn. Further, the outer frame 14a of the advertising unit 14 is also provided for the sake of convenience to show an example of the advertising content, and it is possible to embody all of the outer frames 14a and 14b without providing the outer frame 14a. Further, the number of the advertising frames 14a and 14b can also be set to one frame or can be set to any number of frames of two or more. Further, the configuration of the advertising unit 14 is not limited to that shown in FIG. 2 and can be any configuration. That is, the advertisement unit 14 is configured to print any advertisement content or content in any expression mode or expression format as long as the advertisement content is printed on a print medium for advertisement such as an ordinary leaflet or a promotional item. be able to. Further, as the contents or contents to be printed on the advertising unit 14, any company name, logo mark, brand, etc. can be printed. Further, the laminated paper 10 provided with a printing unit is used as a novelty goods such as a paper towel, which is distributed in large quantities for the purpose of announcing or advertising various information such as sale information of retail stores and company campaign information. It can also be applied to novelty goods such as paper towels distributed in large quantities for the purpose of announcing or disseminating various events (events) such as the Olympics and expositions.

[印刷部の構造]
次に、積層紙10の印刷部の構造について説明する。図5、図6、図7、図8の具体例に示すように、積層紙10は、外層シートとしてのクレープ紙1の外面以外の面であって積層紙10の内部に配置される一つの面に、所定の印刷インキを使用して印刷部を印刷してなることを一つの主要な特徴の一つとしている。これに加えて、積層紙10は、積層紙10の乾燥時においても前記印刷部が積層紙10の外層シートのクレープ紙1を透過して外部から視認され、かつ、積層紙10への含水時には前記印刷部の前記外層シートとしてのクレープ1からの透過度が増大して外部からの視認性が増加するよう、前記外層シートとしてのクレープ紙1のうち、少なくとも前記印刷部が設けられる側の外層シートとしてのクレープ紙1の厚み(坪量)を設定し、また、必要に応じて、厚みと共に材質(紙質)をも設定したことを別の主要な特徴としている。具体的には、実施の形態1では、積層紙10は、外層としての一対のクレープ紙1と、前記一対のクレープ紙1の間に積層状態で配設される1枚以上の不織布2とからなる複数層構造(三層以上の複数層構造)の積層構造を有し、その内部の面として(即ち、積層紙10の内部の面として)、外層シートとしての一方のクレープ紙1に対向する不織布2の面に、前記印刷部を設け、前記クレープ紙1を前記不織布2に対して前記熱融着部1により熱融着及び圧着して接着したことを特徴としている。
[Structure of printing section]
Next, the structure of the printing unit of the laminated paper 10 will be described. As shown in the specific examples of FIG. 5, FIG. 6, FIG. 7, and FIG. 8, the laminated paper 10 is a surface other than the outer surface of the crepe paper 1 as the outer layer sheet and is disposed inside the laminated paper 10. One of the main characteristics is that a printing portion is printed on a surface with a predetermined printing ink. In addition to this, when the laminated paper 10 is dried, the printing portion is visible from the outside through the crepe paper 1 which is the outer layer sheet of the laminated paper 10, and when the laminated paper 10 contains water. At least the outer layer of the crepe paper 1 as the outer layer sheet on the side where the printing section is provided so that the transparency from the crepe 1 as the outer layer sheet of the printing section increases and the visibility from the outside increases. Another major feature is that the thickness (basis weight) of the crepe paper 1 as a sheet is set and, if necessary, the material (paper quality) is set together with the thickness. Specifically, in the first embodiment, the laminated paper 10 comprises a pair of crepe papers 1 as outer layers and one or more non-woven fabrics 2 arranged in a laminated state between the pair of crepe papers 1. Has a laminated structure of a multi-layer structure (three or more layers), and faces one of the crepe papers 1 as an inner surface (that is, as an inner surface of the laminated paper 10) as an outer layer sheet. The printing portion is provided on the surface of the non-woven fabric 2, and the crepe paper 1 is bonded to the non-woven fabric 2 by heat fusion and pressure bonding by the heat fusion portion 1.

[不織布に設けた印刷部]
例えば、印刷部は、図5に示すように、中間層シートとしての不織布2の一方の面(厚み方向の一側面)に設けられた印刷層2aからなる。即ち、積層紙10の不織布2は、印刷部を印刷可能な素材からなる中間層シートとして構成され、不織布2の一方の面に所定の印刷用インキを使用して所望の模様部13や広告部14を印刷により設けることで、印刷部が構成されている。なお、印刷層2aは、図5では、説明の便宜上、不織布2の一方の面上に薄い層状となって描画されているが、実際は、印刷層2aを構成する印刷用インキが、印刷時に、不織布2の一方の面から不織布2の内部に浸透して印刷部の所定の模様等を構成するため、不織布2の内部に印刷用インキが完全に浸透して不織布2の一方の面に印刷用インキによる層が形成されない場合もあり、或いは、不織布2の内部に一部の印刷用インキが浸透する一方で不織布2の一方の面に残りの印刷用インキによる層が形成される場合もある。また、不織布2の内部に印刷用インキが完全に浸透した後に不織布2の他方の面から露出して、不織布2の他方の面にも印刷用インキによる層が形成される場合もある。いずれにしても、積層紙10の印刷部は、印刷面となる不織布2の一方の面において最も高い濃度で描画され、印刷層2aとして視認される。即ち、上述した各種の積層紙10の模様部13や広告部14は、その模様の構成や広告内容等に合わせて、任意の印刷用インキを使用して任意の印刷方法により、不織布2の一方の面に印刷することで設けられる。
[Printing section on non-woven fabric]
For example, as shown in FIG. 5, the printing section includes a printing layer 2a provided on one surface (one side surface in the thickness direction) of the nonwoven fabric 2 as the intermediate layer sheet. That is, the non-woven fabric 2 of the laminated paper 10 is configured as an intermediate layer sheet made of a material capable of printing the printed portion, and one surface of the non-woven fabric 2 is printed with a predetermined printing ink to obtain a desired pattern portion 13 or advertising portion. A printing unit is configured by providing 14 by printing. Note that the printed layer 2a is drawn as a thin layer on one surface of the non-woven fabric 2 in FIG. 5 for convenience of description, but in reality, the printing ink forming the printed layer 2a is printed at the time of printing. Since the non-woven fabric 2 penetrates into the non-woven fabric 2 from one side to form a predetermined pattern of the printing portion, the printing ink completely penetrates into the non-woven fabric 2 to print on one side of the non-woven fabric 2. In some cases, the ink layer may not be formed, or in the non-woven fabric 2, a part of the printing ink may penetrate into the non-woven fabric 2 while the remaining printing ink layer may be formed on one surface of the non-woven fabric 2. In addition, the printing ink may be completely penetrated into the inside of the nonwoven fabric 2 and then exposed from the other surface of the nonwoven fabric 2 to form a layer of the printing ink on the other surface of the nonwoven fabric 2. In any case, the printed portion of the laminated paper 10 is drawn with the highest density on one surface of the non-woven fabric 2 which is the printed surface, and is visually recognized as the printed layer 2a. That is, the pattern portion 13 and the advertisement portion 14 of the various laminated papers 10 described above have one of the non-woven fabrics 2 according to the configuration of the pattern, the content of the advertisement, etc., by using any printing ink and by any printing method. It is provided by printing on the surface of.

[印刷層の構成(印刷インキ及び印刷方法)]
ここで、積層紙10の印刷部の印刷層2aは、不織布2の一方の面に、任意の印刷方法により任意の印刷用インキを使用して形成されるが、好ましくは、印刷部は、印刷方法としてはフレキソ印刷技術を使用して形成した印刷部とし、また、印刷用インキとして水性インキ又はUV(紫外線硬化型)インキを使用して形成した印刷部とする。詳細には、フレキソ印刷は、直接転写方式の凸版印刷の一種であり、版の素材にゴムや合成樹脂を使用し、また、印刷インキとして水性インキやUVインキからなる液状インキを使用するものであるが、積層紙10の印刷部の印刷層2aは、水性インキ又はUVインキの濃度を調整したうえで、不織布2の一方の面に所定の模様部13又は広告部14を印刷して、印刷部を構成している。そして、積層紙10は、この印刷部を有する不織布2を、一対のクレープ紙1の間に介装し、熱融着部列11により相互に熱融着して一体化することで形成されている。この積層紙10は、前記印刷部の印刷対象を、表面が微細な凹凸面となる不織布2とした場合であっても、フレキソ印刷の弾性及び形状追従性を有する版により、印刷部として、所望の模様部13や広告部14を鮮明に印刷することができる。その結果、印刷部を有する不織布2を使用して製造した積層紙10では、特にその湿潤状態で、印刷部が、クレープ紙1を介して、外部から良好な印刷品質で視認される。また、この積層紙10は、不織布2の印刷部の印刷インクが水性インキ又はUVインキからなるため、印刷インクが有機溶剤を含有しないことになる。その結果、印刷部を有する不織布2を使用して製造した積層紙10は、有機溶剤を使用した印刷インキのように有機溶剤の揮発等による影響を受けることがなく、特に、紙おしぼり等の衛生用品に適用された場合に、使用者や環境に優しい商品となる。なお、積層紙10の不織布2への印刷では、例えば、7色まで印刷可能なフレキソ印刷機を使用すると共に、各色の印刷インキの濃度を調整する。
[Configuration of printing layer (printing ink and printing method)]
Here, the printing layer 2a of the printing portion of the laminated paper 10 is formed on one surface of the non-woven fabric 2 using any printing ink by any printing method, but preferably the printing portion is printed. The method is a printed portion formed by using a flexographic printing technique, and a printed portion formed by using a water-based ink or a UV (ultraviolet curing type) ink as a printing ink. In detail, flexographic printing is a type of letterpress printing of the direct transfer method, which uses rubber or synthetic resin as the material of the plate, and also uses liquid ink such as water-based ink or UV ink as printing ink. However, the printing layer 2a of the printing portion of the laminated paper 10 is printed by adjusting the concentration of the water-based ink or the UV ink and then printing the predetermined pattern portion 13 or the advertising portion 14 on one surface of the nonwoven fabric 2. Make up part. The laminated paper 10 is formed by interposing the non-woven fabric 2 having the printed portion between the pair of crepe papers 1 and heat-bonding them together by the heat-bonding portion row 11 to integrate them. There is. In the laminated paper 10, even when the printing target of the printing unit is the nonwoven fabric 2 having a fine uneven surface, a plate having elasticity and shape-following property of flexographic printing can be used as a printing unit. The pattern portion 13 and the advertisement portion 14 can be printed clearly. As a result, in the laminated paper 10 manufactured using the non-woven fabric 2 having the printing portion, the printing portion is visually recognized from the outside with good print quality through the crepe paper 1, particularly in the wet state. Further, in the laminated paper 10, the printing ink of the printing portion of the nonwoven fabric 2 is the water-based ink or the UV ink, so that the printing ink does not contain the organic solvent. As a result, the laminated paper 10 manufactured using the nonwoven fabric 2 having the printing portion is not affected by the volatilization of the organic solvent unlike the printing ink using the organic solvent, and is particularly hygienic for paper towels and the like. When applied to a product, it becomes a product that is friendly to users and the environment. In printing the laminated paper 10 on the nonwoven fabric 2, for example, a flexographic printing machine capable of printing up to 7 colors is used, and the density of each color of printing ink is adjusted.

[不織布の材質]
一方、図5に示す実施の形態1に係る積層紙10は、前記中間層シートとしての不織布2を、印刷部を印刷可能な材質で、かつ、外層シートとしてのクレープ紙を前記線状の熱融着部で確実に熱融着して接着可能な材質の不織布としている。これにより、積層紙10の一方の面側(典型的には、積層紙10を紙おしぼりに適用した場合に、紙おしぼりの外面側の露出する積層紙の一方の面側、即ち、紙おしぼりの表面側)に配置されることになる不織布2の一方の面に、模様部13や広告部14を印刷により設けることができ、かつ、不織布2の両面に一対の外層となるクレープ紙1を良好に接着して、複層構造(図5の場合は三層構造)の積層紙10を形成することができる。
[Material of non-woven fabric]
On the other hand, in the laminated paper 10 according to the first embodiment shown in FIG. 5, the non-woven fabric 2 as the intermediate layer sheet is made of a material capable of printing the printing portion, and the crepe paper as the outer layer sheet is the linear heat treatment. The non-woven fabric is made of a material that can be surely heat-fused at the fusion-bonding portion to be bonded. Thereby, one surface side of the laminated paper 10 (typically, when the laminated paper 10 is applied to a paper towel, the one surface side of the laminated paper exposed on the outer surface side of the paper towel, that is, the paper towel The crepe paper 1 which is a pair of outer layers can be provided on one surface of the non-woven fabric 2 to be arranged on the front side) by printing the pattern portion 13 and the advertising portion 14 on both surfaces. It is possible to form a laminated paper 10 having a multi-layer structure (three-layer structure in the case of FIG. 5) by adhering to.

[不織布の厚み]
また、積層紙10では、上記のように、中間層シートとしての不織布2は、印刷部を印刷可能とする印刷性と、クレープ紙を熱融着可能とする熱融着性の両方の性質を備えた材質とする必要があるが、この印刷性及び熱融着性の双方の特性を兼備するために、厚みを所定範囲内の任意の値とした不織布を使用することが好ましい。具体的には、例えば、従来の不織布製紙おしぼりは、原料シートとして、坪量45〜70g/cm2でシート状にした不織布を使用する。一方、本実施の形態の積層紙10は、原料シートとして一対のクレープ紙1及び不織布2を使用することに加え、不織布2として、坪量15〜25g/mの範囲内の任意の値の厚みを有する不織布を使用することが好ましく、坪量18〜22g/mの範囲内の任意の値の厚みを有することがより好ましく、坪量18〜20g/mの範囲内の任意の値の厚みを有することが更に好ましく、坪量20g/mの厚みとすることが最も好ましい。即ち、積層紙10において、不織布2の厚みが坪量25g/mよりも大きいと、積層紙10が柔軟性に欠ける可能性があり、例えば、積層紙10を紙おしぼり等に適用したときに、積層紙10の使用者に硬い手触り感を与える可能性がある。また、不織布2の厚みが坪量25g/mよりも大きいと、強度が必要以上に高くなり、不要なコスト高騰の原因となる。更に、積層紙10の製造工程中、例えば、一対のヒートシールローラにより不織布2にクレープ紙1を熱融着する工程において、加熱源を有するヒートシールローラから一方のクレープ紙1を介して不織布2に熱を伝達する場合に、不織布2の厚みが増大する分、熱の伝達効率が低下するため、一方のクレープ紙1と不織布2の一方の面との間の熱融着が良好に行える場合でも、他方のクレープ紙1と不織布の他方の面との間の熱融着が十分に行われず、他方のクレープ紙1に対する不織布2の接着力が不足する可能性がある。一方、不織布2の厚みが坪量15g/mよりも小さいと、不織布2に含有される熱融着力発現のための材料である熱可塑性樹脂の量が相対的に減少し、不織布2の両面にクレープ紙1を熱融着するときに十分な熱融着力が得られない可能性があり、また、積層紙10の全体のコシが弱くなって、例えば、積層紙10を紙おしぼり等に適用したときに、積層紙10の使用者の使用感に悪影響を与える可能性がある。
[Thickness of non-woven fabric]
Further, in the laminated paper 10, as described above, the non-woven fabric 2 as the intermediate layer sheet has both the printability that enables the printing portion to be printed and the heat fusion property that enables the crepe paper to be heat-sealed. Although it is necessary to use a material provided with the material, it is preferable to use a non-woven fabric having a thickness of an arbitrary value within a predetermined range in order to have both the printability and the heat fusion property. Specifically, for example, a conventional non-woven paper hand towel uses a sheet-shaped non-woven fabric with a basis weight of 45 to 70 g/cm 2 as a raw material sheet. On the other hand, in the laminated paper 10 of the present embodiment, in addition to using the pair of crepe paper 1 and the non-woven fabric 2 as the raw material sheet, the non-woven fabric 2 has an arbitrary value within the range of the basis weight of 15 to 25 g/m 2 . it is preferred to use a nonwoven fabric having a thickness, more preferably with a thickness of any value within a range of basis weight 18-22 g / m 2, any value within a range of basis weight 18-20 g / m 2 Is more preferable, and the most preferable thickness is 20 g/m 2 . That is, in the laminated paper 10, if the thickness of the nonwoven fabric 2 is larger than the basis weight of 25 g/m 2 , the laminated paper 10 may lack flexibility. For example, when the laminated paper 10 is applied to a paper towel, etc. There is a possibility that the user of the laminated paper 10 will have a hard feel. Further, if the thickness of the nonwoven fabric 2 is larger than the basis weight of 25 g/m 2 , the strength becomes unnecessarily high, which causes unnecessary cost increase. Further, in the process of manufacturing the laminated paper 10, for example, in the process of heat-sealing the crepe paper 1 to the nonwoven fabric 2 by a pair of heat seal rollers, the nonwoven fabric 2 is inserted from the heat seal roller having the heat source through the one crepe paper 1. In the case of transferring heat to the case, since the heat transfer efficiency decreases as the thickness of the non-woven fabric 2 increases, heat fusion between one crepe paper 1 and one surface of the non-woven fabric 2 can be favorably performed. However, heat fusion between the other crepe paper 1 and the other surface of the nonwoven fabric may not be sufficiently performed, and the adhesive force of the nonwoven fabric 2 to the other crepe paper 1 may be insufficient. On the other hand, when the thickness of the non-woven fabric 2 is smaller than the basis weight of 15 g/m 2 , the amount of the thermoplastic resin contained in the non-woven fabric 2 which is a material for expressing the heat-sealing force is relatively reduced, and both sides of the non-woven fabric 2 are When the crepe paper 1 is heat-sealed, a sufficient heat-sealing force may not be obtained, and the overall stiffness of the laminated paper 10 is weakened. For example, the laminated paper 10 is applied to a paper towel. When doing so, the feeling of use of the laminated paper 10 by the user may be adversely affected.

[不織布の原料繊維]
更に、不織布2としては、上記の印刷性及び熱融着性を兼備するために厚みを上記の所定範囲内の値とした場合において、特に、厚みを上記の所定範囲内の下限値側の値とした場合(例えば、厚みを坪量15g/m、坪量18g/m等の値とした場合)、芯鞘構造複合繊維からなる不織布を使用することが好ましい。即ち、不織布2の厚みが相対的に小さくなる場合(即ち、上記の所定範囲内の下限値側の値となる場合)、このように相対的に厚みの小さい不織布だと、積層紙10の全体のコシが弱くなる可能性が大きくなるが、芯鞘構造複合繊維からなる不織布を使用することで、不織布2にクレープ紙1を熱融着するときに、芯鞘構造複合繊維の鞘部が所定の加熱温度で軟化又は溶融して、クレープ紙1に対して熱融着による接着力を発現する一方で、芯鞘構造複合繊維の芯部が軟化又は溶融せずにそのまま残存して、不織布2自体の強度やコシを維持するため、最終的に積層紙10全体の強度やコシも維持することができ、薄手の不織布2で積層紙10のボリューム感を維持することもできる。
[Nonwoven fabric raw material fiber]
Further, as the non-woven fabric 2, when the thickness is set to a value within the above-mentioned predetermined range in order to combine the above-mentioned printability and heat-sealing property, in particular, the thickness is a value on the lower limit side within the above-mentioned predetermined range. In such a case (for example, when the thickness is a value of grammage 15 g/m 2 , grammage 18 g/m 2, etc.), it is preferable to use a nonwoven fabric composed of core-sheath structure composite fibers. That is, when the thickness of the non-woven fabric 2 is relatively small (that is, when the value is on the lower limit value side within the above-mentioned predetermined range), the non-woven fabric having such a relatively small thickness can provide the entire laminated paper 10. However, when the crepe paper 1 is heat-sealed to the nonwoven fabric 2, the sheath portion of the core-sheath structure composite fiber is predetermined when the crepe paper 1 is heat-sealed to the nonwoven fabric 2. While softening or melting at the heating temperature of 1 to develop an adhesive force to the crepe paper 1 by heat fusion, the core portion of the core-sheath structure composite fiber remains as it is without being softened or melted, and the nonwoven fabric 2 Since the strength and elasticity of the laminated paper 10 are maintained, the strength and elasticity of the entire laminated paper 10 can be finally maintained, and the volume of the laminated paper 10 can be maintained with the thin nonwoven fabric 2.

[クレープ紙の厚み]
積層紙10では、クレープ紙1は、所定の透過率(透過度)を達成するための所定範囲内の任意の値の厚みを有している。具体的には、不織布2の一方の面(即ち、印刷部を設ける側の面)に重ねて接合される一方のクレープ紙1は、積層紙10の乾燥状態で、クレープ紙1を介して不織布2の印刷部の少なくとも一部が視認可能となるような透過率(或いは、不織布2の印刷部の少なくとも一部が半透明状態で視認可能となるような透過率)であって、かつ、少なくとも積層紙10の含水による湿潤状態で、クレープ紙1を介して不織布2の印刷部の全体が鮮明な状態で視認される透過率(或いは、不織布2の印刷部の全体がほぼ透明状態で視認可能となるような透過率)となるよう、その厚みを設定している。一方、不織布2の他方の面に重ねて接合される他方のクレープ紙1は、通常は、一方のクレープ紙1と同様の厚みに設定されるが、異なる厚みに設定することもできる。他方のクレープ紙1を一方のクレープ紙1と同様の厚みとした場合でも、不織布2の厚みを上記の所定範囲内とすると、積層紙10の乾燥状態で、他方のクレープ紙1を介して不織布2の印刷部の少なくとも一部が(一方のクレープ紙1の側よりは鮮明度は低いものの)やはり視認可能となり、かつ、積層紙10の含水による湿潤状態で、他方のクレープ紙1を介して不織布2の印刷部の全体が(一方のクレープ紙1の側よりは鮮明度は低いものの)ある程度鮮明な状態で視認される。いずれにしても、積層紙10では、クレープ紙1は、所定の光透過率(光透過度と同義、以下、単に「透過率」という。)を達成するための所定範囲内の任意の値の厚みに設定されており、これにより、一方のクレープ紙1の側から視認しても、他方のクレープ紙の側から視認しても、積層紙10の乾燥状態で、クレープ紙1を介して不織布2の印刷部の少なくとも一部が視認可能となり、かつ、積層紙10の含水による湿潤状態で、クレープ紙1を介して不織布2の印刷部の全体が程度の差はあれ鮮明な状態で視認されるという特有の効果が発揮される。
[Thickness of crepe paper]
In the laminated paper 10, the crepe paper 1 has a thickness of an arbitrary value within a predetermined range for achieving a predetermined transmittance (transmittance). Specifically, the one crepe paper 1 that is overlaid and joined to one surface of the non-woven fabric 2 (that is, the surface on which the printing portion is provided) is the non-woven fabric through the crepe paper 1 in the dry state of the laminated paper 10. 2 has a transmittance such that at least a part of the printed portion is visible (or a transmittance that allows at least a portion of the printed portion of the nonwoven fabric 2 to be visible in a semitransparent state), and at least When the laminated paper 10 is wet with water, the transmittance of the printed portion of the nonwoven fabric 2 is clearly visible through the crepe paper 1 (or the entire printed portion of the nonwoven fabric 2 is visible in a substantially transparent state). The thickness is set so that the transmittance is such that On the other hand, the other crepe paper 1 that is overlaid and joined to the other surface of the nonwoven fabric 2 is usually set to the same thickness as the one crepe paper 1, but it may be set to a different thickness. Even when the other crepe paper 1 has the same thickness as the one crepe paper 1, if the thickness of the non-woven fabric 2 is within the above-mentioned predetermined range, the non-woven fabric is interposed between the other crepe paper 1 in the dry state of the laminated paper 10. At least a part of the printed portion of No. 2 is still visible (although the definition is lower than that of the one crepe paper 1 side), and in the wet state of the laminated paper 10 due to the water content, through the other crepe paper 1 The entire printed portion of the nonwoven fabric 2 is visually recognized in a somewhat clear state (although the sharpness is lower than that of the one crepe paper 1 side). In any case, in the laminated paper 10, the crepe paper 1 has an arbitrary value within a predetermined range for achieving a predetermined light transmittance (synonymous with light transmittance, hereinafter simply referred to as “transmittance”). The thickness is set so that whether the crepe paper 1 is viewed from one side or the other crepe paper is viewed from the side, the laminated paper 10 is in a dry state and the nonwoven fabric is interposed through the crepe paper 1. At least a part of the printed portion of No. 2 is visible, and when the laminated paper 10 is wet with water, the entire printed portion of the non-woven fabric 2 is visible through the crepe paper 1 in a more or less clear state. The unique effect of

詳細には、積層紙10において、クレープ紙1の厚みは、坪量で、20〜50g/mの範囲内の任意の値に設定され、より好ましくは、20〜40g/mの範囲内の任意の値に設定され、更に好ましくは、30〜40g/mの範囲内の任意の値に設定され、より更に好ましくは、30〜35g/mの範囲内の任意の値に設定され、一層更に好ましくは、30〜33g/mの範囲内の任意の値又は33〜35g/mの範囲内の任意の値に設定され、最も好ましくは、約33g/mの値又は約35g/mの値に設定されている。例えば、クレープ紙1の厚みは、坪量で、35g/m、27g/m、又は、23g/mの値に設定することができる。本発明者は、クレープ紙1のクレープ皺とクレープ紙1の厚みとの関係について鋭意研究を重ねた結果、クレープ紙1の厚みが上記範囲外となると、積層紙10のクレープ紙1に要求される所望の物性を確保できないという知見を得た。即ち、クレープ紙1の厚みが、坪量で20g/m以下では、クレープ紙の製造装置を使用してクレープ紙1を製造するときに、クレープ紙1の原料シート(クレープを形成していない状態の紙シート)の送給速度を増加したときに、原料シートにクレープを形成することができないという知見を得た。一方、クレープ紙1の厚みが、坪量で50g/mを超えると、積層紙10を形成すべく、クレープ紙1を不織布2に積層して熱融着部11で不織布2に対して熱融着しようとしたときに、前記ヒートシールローラの圧着面からの熱が厚肉となるクレープ紙1に遮られて不織布2まで十分に到達せず、不織布2の接着材としての熱可塑性樹脂が十分に溶融せず、クレープ紙1に対する所期の接着力を発現できず、クレープ紙1を不織布2に接着できない可能性がある。 Specifically, in the laminated paper 10, the thickness of the crepe paper 1 is set to any value in the range of 20 to 50 g/m 2 in terms of basis weight, and more preferably in the range of 20 to 40 g/m 2 . Is set to an arbitrary value within the range of 30 to 40 g/m 2 , and more preferably to an arbitrary value within the range of 30 to 35 g/m 2. , even more preferably, it is set to any value in any value or range of 33~35g / m 2 in the range of 30~33g / m 2, and most preferably, the value or about about 33 g / m 2 It is set to a value of 35 g/m 2 . For example, the thickness of the crepe paper 1, basis weight, 35g / m 2, 27g / m 2, or can be set to a value of 23 g / m 2. The present inventor has conducted earnest research on the relationship between the crepe wrinkles of the crepe paper 1 and the thickness of the crepe paper 1, and as a result, when the thickness of the crepe paper 1 falls outside the above range, the crepe paper 1 of the laminated paper 10 is required. We obtained the finding that the desired physical properties cannot be secured. That is, when the thickness of the crepe paper 1 is 20 g/m 2 or less in basis weight, when the crepe paper 1 is manufactured using the crepe paper manufacturing apparatus, the raw material sheet of the crepe paper 1 (the crepe is not formed) It was found that the crepe cannot be formed on the raw material sheet when the feeding speed of the paper sheet) is increased. On the other hand, when the thickness of the crepe paper 1 exceeds 50 g/m 2 in basis weight, the crepe paper 1 is laminated on the non-woven fabric 2 and heat-bonded to the non-woven fabric 2 by the heat-sealing portion 11 in order to form the laminated paper 10. When attempting to fuse, the heat from the pressure-bonding surface of the heat-sealing roller is blocked by the thick crepe paper 1 and does not reach the nonwoven fabric 2 sufficiently, so that the thermoplastic resin as the adhesive material of the nonwoven fabric 2 is There is a possibility that the crepe paper 1 does not melt sufficiently, the desired adhesive force to the crepe paper 1 cannot be expressed, and the crepe paper 1 cannot be bonded to the nonwoven fabric 2.

また、クレープ紙1の厚みが坪量で40g/mを超えると、クレープ紙の製造装置による製造時に、クレープ紙を製造するために原料シートの送給速度を極端に低速にする必要が生じて、製造効率が低下する可能性があるため、この点からは、クレープ紙1の厚みの上限を40g/mとすることが好ましい。また、クレープ紙1の厚みが坪量で35g/mを超えると、クレープ紙の製造装置による製造時に、原料シートの送給速度を低速にしても、クレープ紙の製造装置の性能によってはクレープ紙の製造自体が困難になる可能性があるため、この点からは、クレープ紙1の厚みの上限を35g/mとすることが好ましい。 Further, if the thickness of the crepe paper 1 exceeds 40 g/m 2 in basis weight, it is necessary to make the feed rate of the raw material sheet extremely low in order to manufacture the crepe paper at the time of manufacturing by the crepe paper manufacturing apparatus. From this point, it is preferable to set the upper limit of the thickness of the crepe paper 1 to 40 g/m 2 because the production efficiency may decrease. Further, if the thickness of the crepe paper 1 exceeds 35 g/m 2 in basis weight, the crepe paper may be produced at a low speed at the time of production by the crepe paper production apparatus, depending on the performance of the crepe paper production apparatus. From this point, it is preferable to set the upper limit of the thickness of the crepe paper 1 to 35 g/m 2 because the paper itself may be difficult to manufacture.

[積層紙の全体の厚み(クレープ紙と不織布の合計厚み)]
上記のとおり、積層紙10の構成要素であるクレープ紙1及び不織布2は、それぞれ、所定の範囲内の任意の値の厚みを有するよう構成され、積層紙10の全体の厚みは、前記クレープ紙1の厚み及び不織布2の厚みにより決定されるが、好ましくは、積層紙10の全体の厚みは、各クレープ紙1の厚みを坪量で35g/mとし、不織布2の厚みを坪量で20g/mとすることで、全体の厚みを(35+20+35=)90g/mとすることが、最も好ましい。クレープ紙1の厚みをこの値(35g/m)とすると共に、不織布2の厚みをこの値(20g/m)とし、積層紙10の全体の厚みをこの値(90g/m)とすると、積層紙10の製造時に積層紙10の原料シート(即ち、1対のクレープ紙原料シートの間に1枚の不織布原料シートを介装してなる原料シート)を所定の送給位置で切断する(即ち、積層紙10の原料シートを使用目的に応じて所定の長さに切断する)ときに、切断を最も良好に行うことでき、製造効率を向上すると共に、歩留まりを向上することができる。
[Overall thickness of laminated paper (total thickness of crepe paper and non-woven fabric)]
As described above, the crepe paper 1 and the non-woven fabric 2 which are the constituent elements of the laminated paper 10 are each configured to have a thickness of an arbitrary value within a predetermined range, and the total thickness of the laminated paper 10 is the crepe paper. The thickness of the laminated paper 10 is preferably 35 g/m 2 in terms of the basis weight of each crepe paper 1 and the thickness of the nonwoven fabric 2 is in terms of the basis weight. with 20 g / m 2, to make the total thickness and (35 + 20 + 35 =) 90g / m 2, most preferred. The thickness of the crepe paper 1 is set to this value (35 g/m 2 ), the thickness of the nonwoven fabric 2 is set to this value (20 g/m 2 ), and the total thickness of the laminated paper 10 is set to this value (90 g/m 2 ). Then, when manufacturing the laminated paper 10, the raw material sheet of the laminated paper 10 (that is, the raw material sheet formed by interposing one non-woven fabric raw material sheet between a pair of crepe paper raw material sheets) is cut at a predetermined feeding position. (That is, when the raw material sheet of the laminated paper 10 is cut into a predetermined length according to the purpose of use), the cutting can be performed most favorably, the manufacturing efficiency can be improved, and the yield can be improved. ..

[印刷部を有する積層紙の効果]
このように、印刷部を備えた積層紙10は、模様部13や広告部14等の印刷部が、クレープ紙1を通して半分浮き出たような外観及び見た目となるため、独特の意匠的効果を発揮することができる。具体的には、積層紙10の乾燥状態では、乾燥したクレープ紙1の透過率(透過度)が相対的に低くなるため、印刷部の模様や広告は、クレープ紙1を介して不鮮明な状態ではあるが、ある程度は視認可能な状態となっているが、積層紙10の含水による湿潤状態では、湿潤したクレープ紙1の透過率(透過度)が相対的に高くなるため、印刷部の模様や広告は、クレープ紙1を介して鮮明な状態で視認されると共に、クレープ紙1の存在により、積層紙10から浮き出たような印象で視認されるという特有の効果が発揮される。
[Effect of laminated paper with printing section]
In this way, the laminated paper 10 having the printing portion has a unique design effect because the printing portion such as the pattern portion 13 and the advertising portion 14 has an appearance and an appearance that are half raised through the crepe paper 1. can do. Specifically, when the laminated paper 10 is in a dry state, the transmittance (transmittance) of the dried crepe paper 1 is relatively low, so that the pattern or the advertisement of the printed portion is not clear through the crepe paper 1. However, although it is visible to some extent, when the laminated paper 10 is wet with water, the transmittance (permeability) of the wet crepe paper 1 is relatively high, so that the pattern of the printing portion is The advertisement and the advertisement are visually recognized through the crepe paper 1 in a clear state, and due to the presence of the crepe paper 1, the advertisement is visually perceived as if it were raised from the laminated paper 10.

[不織布に設けた場合の印刷部の効果]
また、上記のように、積層紙10は、上記のように構成したため、従来にない模様部13や広告部14を印刷した印刷部を備えることができる。よって、例えば、従来のカラー紙おしぼり(全面を単色で色付けした紙おしぼり)のように、単に、おしぼりの原料シートの原料繊維(パルプ等)に色付けしたものと比較すると、積層紙10は、印刷部としての模様部13や広告部14により、非常に意匠性に富む製品となる。また、積層紙10は、印刷部を設けた不織布2を一対のクレープ紙1の間に挟持して形成されるため、印刷部の模様や広告が、外部から視認したときに柔らかい印象を看者に与え、独特の視覚的効果を発揮する。特に、積層紙10を主要用途である紙おしぼり等の衛生紙用品に適用した場合、通常は、衛生紙用品としての積層紙10は、含水して湿潤状態とした後で使用者に提供され、その湿潤状態の積層紙10により使用者が手や体の一部の汚れ等を拭き取ることになる。この場合、積層紙10の印刷部の印刷インキが水分により溶解してクレープ紙1から外部に溶出し、使用者の手や体に付着等しないようにする必要がある。しかし、従来のカラー紙おしぼりでは、その全体を所定の単色の印刷インキで色付けしているため、その印刷インキがカラー紙おしぼりの表面に露出する構成となる。したがって、従来のカラー紙おしぼりは、含水による湿潤状態で、表面に露出する印刷インキが溶解して使用者の手や肌等に触れないよう、印刷インキを有機溶剤タイプの印刷インキとする必要があり、上記のように、有機溶剤の揮発成分等による影響を否定できない。
[Effect of printing section when it is provided on non-woven fabric]
Further, as described above, since the laminated paper 10 is configured as described above, the laminated paper 10 can be provided with the printing section on which the pattern section 13 and the advertising section 14 which have not been conventionally printed are printed. Therefore, for example, as compared with a conventional color paper hand towel (paper hand towel whose entire surface is colored with a single color) simply colored with the raw material fibers (pulp etc.) of the raw material sheet of the hand towel, the laminated paper 10 is printed. The pattern portion 13 and the advertisement portion 14 as a portion make the product very rich in design. Further, since the laminated paper 10 is formed by sandwiching the non-woven fabric 2 provided with the printing portion between the pair of crepe papers 1, the pattern of the printing portion and the advertisement have a soft impression when viewed from the outside. To give a unique visual effect. In particular, when the laminated paper 10 is applied to a sanitary paper product such as a paper towel, which is a main application, the laminated paper 10 as a sanitary paper product is usually provided to a user after being moistened and made wet. The laminated paper 10 in this state allows the user to wipe off stains and the like on the hands and a part of the body. In this case, it is necessary to prevent the printing ink in the printing portion of the laminated paper 10 from being dissolved by water and eluting from the crepe paper 1 to the outside and adhering to the user's hand or body. However, in the conventional color paper hand towel, since the whole is colored with a predetermined monochromatic printing ink, the printing ink is exposed on the surface of the color paper hand towel. Therefore, it is necessary for the conventional color paper hand towel to be an organic solvent type printing ink so that the printing ink exposed on the surface does not melt and come into contact with the user's hands, skin, etc. in a wet state with water. Therefore, as described above, the influence of the volatile components of the organic solvent cannot be denied.

一方、本実施の形態の積層紙10は、上記のように、フレキソ印刷を利用して水性インキ又はUVインキにより印刷部を不織布2に形成し、かつ、不織布2の両面をそれぞれクレープ紙1により完全に被覆するため、印刷部の印刷インキが積層紙10の表面で直接露出することはなく、必ず、クレープ紙1により遮蔽された状態を維持する。したがって、積層紙10は、印刷部を設けているにもかかわらず、含水時の湿潤状態で使用しても、使用者の手や肌に直接印刷インキが接触しない構成となっており、使用者に対して安全で無害な積層紙10として提供できると共に、環境に優しい積層紙として提供することができ、また、そのために、従来のカラー紙おしぼりのように有機溶剤タイプの印刷インキを使用する必要がないという利点を有する。なお、積層紙10の印刷部の印刷インキとしての水性インキとしては、顔料タイプの水性インキとすることが好ましく、こうすると、積層紙10の含水時の湿潤状態において、不織布2の印刷部の印刷インキが、容易に溶解して外部に溶出することを効果的に防止することができる。   On the other hand, in the laminated paper 10 of the present embodiment, as described above, the printed portion is formed on the non-woven fabric 2 by using the water-based ink or the UV ink by using flexographic printing, and both sides of the non-woven fabric 2 are formed by the crepe paper 1 respectively. Since the ink is completely covered, the printing ink in the printing portion is not directly exposed on the surface of the laminated paper 10 and is always kept in the state of being shielded by the crepe paper 1. Therefore, the laminated paper 10 has a structure in which the printing ink does not come into direct contact with the user's hand or skin even when the laminated paper 10 is used in a wet state when it contains water, even though the printing section is provided. Can be provided as a laminated paper 10 that is safe and harmless to the environment, and can be provided as an environmentally friendly laminated paper. For that purpose, it is necessary to use an organic solvent type printing ink like a conventional color paper hand towel. There is an advantage that there is no. In addition, as the water-based ink as the printing ink of the printing portion of the laminated paper 10, it is preferable to use a pigment-type water-based ink. By doing so, printing of the printing portion of the nonwoven fabric 2 is performed in a wet state when the laminated paper 10 is wet. It is possible to effectively prevent the ink from easily dissolving and eluting to the outside.

[印刷部を有する積層紙の製造方法(不織布原料シートの幅寸法)]
次に、印刷部を有する積層紙10の製造方法について説明する。一般に、不織布は、天然繊維(パルプ)や合成繊維からなる所定の原料繊維から、乾式法、湿式法、又は、スパンボンド法等の所定のウエブ形成方法によりウエブ(フリースとも呼ばれる)を製造し、そのウエブの繊維間を、ケミカルボンド法、サーマルボンド法、ニードルパンチ法、又は、水流絡号法等の所定の結合方法により結合して製造される。一方、本実施の形態の積層紙10は、不織布2として、前記芯鞘構造複合繊維からなる不織布を使用することが好ましいが、更に、不織布2としては、前記サーマルボンド法の一種であるエアスルー法により繊維間を結合して製造した不織布(以下、説明の便宜上、「エアスルー系不織布」という。)を使用することが更に好ましい。このエアスルー系不織布は、伸長性や柔軟性に富み、柔らかい感触を使用者に与えて肌触り感が良い等の利点があり、また、不織布2としてクレープ紙1を熱融着した後に、クレープ紙1が前記するときにも、良好な接着力の発現を可能にする。また、詳細については後述の積層紙の製造装置及び積層紙の製造方法の項で説明するが、積層紙10の製造においては、一対のクレープ紙1の原料シート(以下、「クレープ紙原料シート」という。)の間に不織布2の原料シート(以下、「不織布原料シート」という。)を挟んで三層構造(3枚重ね)の原料シート(以下「積層原料シート」という。)を構成する。そして、その積層原料シートを例えば一対のヒートシールローラ間に送給して、一対のヒートシールローラにより一対のクレープ紙原料シートをそれぞれ不織布原料シートに熱融着して一体化することで、最終的な積層紙を製造する。このとき、クレープ紙原料シート及び不織布原料シートは、通常、所定幅の同一幅となる幅方向寸法(例えば、1200mmの幅方向寸法)を有している。特に、不織布原料シートの幅方向寸法がクレープ紙原料シートの幅方向寸法よりも小さいと、積層原料シートの幅方向端部においてクレープ紙原料シートを不織布原料シートに熱融着できない部分が発生することになるため、不織布原料シートの幅方向寸法が、クレープ紙原料シートの幅方向寸法より小さくなることは好ましくない。
[Method for manufacturing laminated paper having printed portion (width dimension of non-woven fabric raw material sheet)]
Next, a method for manufacturing the laminated paper 10 having the printing section will be described. In general, a non-woven fabric is produced from a predetermined raw material fiber made of natural fiber (pulp) or synthetic fiber by a dry method, a wet method, or a predetermined web forming method such as a spun bond method to produce a web (also called a fleece), The fibers of the web are bonded by a predetermined bonding method such as a chemical bond method, a thermal bond method, a needle punch method, or a water junction method. On the other hand, in the laminated paper 10 of the present embodiment, it is preferable to use a non-woven fabric composed of the core-sheath structure composite fiber as the non-woven fabric 2. Further, as the non-woven fabric 2, an air-through method which is a kind of the thermal bond method is used. It is more preferable to use a non-woven fabric manufactured by bonding the fibers with each other (hereinafter, referred to as “air-through non-woven fabric” for convenience of description). This air-through type nonwoven fabric has the advantages that it is rich in extensibility and flexibility and that it gives the user a soft feel and a good feel to the touch. Moreover, after the crepe paper 1 is heat-sealed as the nonwoven fabric 2, the crepe paper 1 Also enables the development of good adhesive strength. Further, the details will be described in the section of the laminated paper manufacturing apparatus and the laminated paper manufacturing method described later, but in the manufacturing of the laminated paper 10, a pair of raw material sheets of the crepe paper 1 (hereinafter, “crepe paper raw material sheet”). The raw material sheet of the non-woven fabric 2 (hereinafter, referred to as “nonwoven fabric raw material sheet”) is sandwiched between the two to form a raw material sheet having a three-layer structure (three layers) (hereinafter referred to as “laminated raw material sheet”). Then, the laminated raw material sheet is fed between, for example, a pair of heat-sealing rollers, and the pair of heat-sealing rollers heat-bonds a pair of the crepe paper raw material sheets to the respective non-woven fabric raw material sheets to integrate the final sheets. Typical laminated paper. At this time, the crepe paper raw material sheet and the non-woven fabric raw material sheet usually have a widthwise dimension (for example, a widthwise dimension of 1200 mm) that is the same width as a predetermined width. In particular, if the widthwise dimension of the non-woven fabric raw material sheet is smaller than the widthwise dimension of the crepe paper raw material sheet, a portion where the crepe paper raw material sheet cannot be heat-sealed to the non-woven fabric raw material sheet at the widthwise end of the laminated raw material sheet may occur. Therefore, it is not preferable that the widthwise dimension of the nonwoven fabric raw material sheet is smaller than the widthwise dimension of the crepe paper raw material sheet.

[不織布の材質に応じた不織布原料シートの幅方向寸法の設定]
一方、上記のように、不織布2に印刷部を設ける場合、予め、不織布原料シートを所定の印刷装置に送給して、その原料シートに所定の印刷部を印刷することになるが、本発明者は、このとき、不織布として前記エアスルー系不織布を使用した場合、その弾性が大きいことに起因すると考えられるが、不織布原料シートが印刷時の熱により収縮するとの知見を得たため、この影響を考慮した積層紙の発明について鋭意研究を続けた結果、以下の構成に想到した。即ち、積層紙10に印刷部を形成する場合、例えば、フレキソ印刷を使用して印刷部を形成する場合、幅1200mmの不織布原料シート2に印刷部を印刷すると、印刷後は、不織布原料シートの幅が1200mmから1150mmへと収縮する(即ち、元の幅の約96%の幅へ収縮する)、或いは、他の条件では不織布原料シートの幅が1300mmから1200mmへと収縮する(即ち、元の幅の約92%の幅へ収縮する)との知見を本発明者は得た。本発明者は、印刷時の不織布原料シートの収縮を考慮して、不織布原料シートを幅方向に(収縮する分だけ)伸長した状態で印刷することも試行したが、この場合、不織布原料シートに所期の印刷を行うことが困難になるとの知見を得た。したがって、印刷部を有する積層紙10の製造方法においては、不織布原料シートとして、不織布原料シートへの印刷時の収縮を補償するため、その収縮率に応じて、実際に得るべき積層紙10の幅よりも所定割合だけ大きな寸法の幅を有する不織布原料シートを使用する(即ち、収縮率に応じた収縮寸法を補償する幅となるよう不織布原料シートの幅寸法を設定する)。
[Setting of widthwise dimension of non-woven fabric raw material sheet according to non-woven fabric material]
On the other hand, as described above, when the printing portion is provided on the non-woven fabric 2, the non-woven fabric raw material sheet is fed to a predetermined printing device in advance to print the predetermined printing portion on the raw material sheet. At this time, when the air-through type non-woven fabric is used as the non-woven fabric, it is thought that this is due to its large elasticity. As a result of continued intensive research on the invention of the laminated paper, the following constitution was conceived. That is, when the printed portion is formed on the laminated paper 10, for example, when the printed portion is formed by using flexographic printing, when the printed portion is printed on the nonwoven fabric raw sheet 2 having a width of 1200 mm, after printing, The width shrinks from 1200 mm to 1150 mm (ie, shrinks to about 96% of the original width), or under other conditions the width of the nonwoven material sheet shrinks from 1300 mm to 1200 mm (ie, the original width). The present inventor has obtained the finding that the width shrinks to about 92% of the width). The present inventor also tried to print the non-woven fabric raw material sheet in a stretched state in the width direction (by the amount of shrinkage) in consideration of the shrinkage of the non-woven fabric raw material sheet. We have found that it will be difficult to perform the desired printing. Therefore, in the method for manufacturing the laminated paper 10 having the printing portion, the width of the laminated paper 10 to be actually obtained according to the shrinkage ratio is compensated for as the nonwoven fabric raw material sheet in order to compensate the shrinkage at the time of printing on the nonwoven fabric raw material sheet. A non-woven fabric raw material sheet having a width larger than the above by a predetermined ratio is used (that is, the width dimension of the non-woven fabric raw material sheet is set so as to have a width that compensates the shrinkage dimension according to the shrinkage ratio).

本発明者は、実験により、例えば、幅1200mmの不織布原料シートを使用して、この不織布原料シートに前記印刷部を印刷した場合、この不織布原料シートは、印刷後に収縮して、その幅が1150mmの幅(即ち、印刷前の幅より50mm小さい幅、或いは、印刷前の幅より約4%小さい幅)になることを確認している。したがって、本実施の形態の積層紙の製造では、収縮後に必要な寸法より約4%(約4.12%)寸法の大きい原紙としての不織布を使用する。例えば、積層紙の原料シートの幅が1200mmとなる場合、クレープ紙原料シートの幅は、同一の1200mmとするが、不織布原料シートの幅は、1200mmよりも約4%大きい幅(例えば、1250mmの幅)とする。   The present inventor, through experiments, uses, for example, a non-woven fabric raw sheet having a width of 1200 mm to print the printing portion on the non-woven fabric raw sheet, and the non-woven fabric raw sheet shrinks after printing to have a width of 1150 mm. It has been confirmed that the width is 50 mm smaller than the width before printing, or about 4% smaller than the width before printing. Therefore, in the production of the laminated paper according to the present embodiment, a nonwoven fabric as a base paper having a size that is about 4% (about 4.12%) larger than the size required after shrinkage is used. For example, when the width of the raw material sheet of laminated paper is 1200 mm, the width of the raw material sheet of crepe paper is the same 1200 mm, but the width of the raw material sheet of non-woven fabric is about 4% larger than 1200 mm (for example, 1250 mm). Width).

[不織布原料シートの幅寸法設定による特有の効果]
上記のように幅方向寸法を設定した(即ち、不織布原料シートの印刷時の収縮率を補償するように幅方向寸法を設定した)不織布原料シートを使用した積層紙の製造方法によれば、不織布原料シートの幅が、前記印刷部の印刷工程の後に、積層紙原料シートの所定幅(即ち、クレープ紙原料シートの所定幅)と同一幅となる。例えば、積層紙原料シートの所定幅(即ち、クレープ紙原料シートの所定幅)が1200mmの場合、不織布原料シートの幅も、同一幅である約1200mmの幅(即ち、印刷前の幅より50mm小さい幅、或いは、印刷前の幅より約4%小さい幅)になる。したがって、この印刷後の不織布原料シート(幅約1200mm)を、一対のクレープ紙原料シート(幅1200mm)の中間に積層して構成した三層構造の積層紙原料シートは、一対の外層としてのクレープ紙原料シートと、中間層としての不織布原料シートとが、全て、同一幅となり、円滑に幅1200mmの積層紙原料シートとして積層紙の製造工程に提供することができ、製造後の積層紙10も、所望幅である1200mmの幅を有することになる。
[Unique effect of setting width dimension of non-woven fabric raw material sheet]
According to the method for producing a laminated paper using the non-woven fabric raw sheet having the widthwise dimension set as described above (that is, the widthwise dimension set so as to compensate the shrinkage factor at the time of printing of the non-woven fabric raw material sheet), The width of the raw material sheet becomes the same width as the predetermined width of the laminated paper raw material sheet (that is, the predetermined width of the crepe paper raw material sheet) after the printing step of the printing unit. For example, when the predetermined width of the laminated paper raw material sheet (that is, the predetermined width of the crepe paper raw material sheet) is 1200 mm, the width of the non-woven fabric raw material sheet is about 1200 mm which is the same width (that is, 50 mm smaller than the width before printing). The width or the width before printing is about 4% smaller). Therefore, a three-layer laminated paper raw material sheet constituted by laminating this printed non-woven raw material sheet (width 1200 mm) in the middle of a pair of crepe paper raw material sheets (width 1200 mm) is a crepe as a pair of outer layers. The paper raw material sheet and the non-woven fabric raw material sheet as the intermediate layer all have the same width, and can be smoothly provided as a laminated paper raw material sheet having a width of 1200 mm in the manufacturing process of the laminated paper. Will have a desired width of 1200 mm.

実施の形態2(印刷部をクレープ紙に設けてなる積層紙)
[積層紙の全体構成及びクレープ紙の構成]
図5に示すように、実施の形態1の例では、積層紙10は、1対のクレープ紙1と1枚の不織布2とからなる三層構造(3枚のシートの重ね合わせ構造)となり、かつ、中間層シートとしての不織布2の表面に印刷部の印刷層2aを設けた構成となっているが、図6に示すように、実施の形態2の三層構造の積層紙10では、外層シートとしてのクレープ紙1の内面に印刷部の印刷層1aが設けられている。即ち、実施の形態2では、積層紙10は、外層シートとしての一対のクレープ紙1と、前記一対のクレープ紙1の間に積層状態で配設される1枚以上の中間層シートとしての不織布2とからなる複数層構造(三層以上の複数層構造)を有し、その内部の面として(即ち、積層紙10の内部の面として)、外層シートとしての一方のクレープ紙1の内面に前記印刷部を設け、前記クレープ紙1を前記不織布2に対して前記熱融着部1により熱融着及び圧着して接着したことを特徴としている。なお、クレープ紙1の内面とは、外層シートとしての一対のクレープ紙1の間に1枚(又は2枚以上)の中間層シートとしての不織布2を挟んで重ね合わせ、積層構造の積層紙10を構成したときに、積層紙10の積層構造の内側(即ち、不織布2と対面する側)に来る面をいう。ここで、クレープ紙1の両面は、一方の面が平滑度の高い(即ち、相対的に滑らかな面で手触り感の良い)表面となっており、他方の面が平滑度の低い(即ち、相対的に粗い面でざらざらとして手触りのある)裏面とからなっているが、実施の形態2の積層紙10では、クレープ紙1の前記表面側を内面側として、上記の積層構造を構成することが好ましい。
Embodiment 2 (laminated paper in which a printing unit is provided on crepe paper)
[Overall structure of laminated paper and structure of crepe paper]
As shown in FIG. 5, in the example of the first embodiment, the laminated paper 10 has a three-layer structure (a laminated structure of three sheets) composed of a pair of crepe papers 1 and one nonwoven fabric 2, In addition, the non-woven fabric 2 as the intermediate layer sheet is provided with the printing layer 2a of the printing portion on the surface thereof. However, as shown in FIG. 6, in the three-layer laminated paper 10 of the second embodiment, the outer layer is The printing layer 1a of the printing unit is provided on the inner surface of the crepe paper 1 as a sheet. That is, in the second embodiment, the laminated paper 10 includes a pair of crepe papers 1 as outer layer sheets, and one or more non-woven fabrics as intermediate layer sheets arranged in a laminated state between the pair of crepe papers 1. 2 has a multi-layer structure (a multi-layer structure of three or more layers), and as an inner surface thereof (that is, as an inner surface of the laminated paper 10) and an inner surface of one crepe paper 1 as an outer layer sheet. The printing portion is provided, and the crepe paper 1 is bonded to the nonwoven fabric 2 by heat fusion and pressure bonding by the heat fusion portion 1. The inner surface of the crepe paper 1 is laminated by sandwiching one (or two or more) non-woven fabric 2 as an intermediate layer sheet between a pair of crepe papers 1 as outer layer sheets, and laminating the laminated paper 10 having a laminated structure. Is a surface that comes to the inside (that is, the side facing the nonwoven fabric 2) of the laminated structure of the laminated paper 10. Here, as for both surfaces of the crepe paper 1, one surface has a high smoothness (that is, a relatively smooth surface that is comfortable to the touch), and the other surface has a low smoothness (that is, a smooth surface). The laminated paper 10 according to the second embodiment has the inner surface side of the crepe paper 1 to form the above laminated structure. Is preferred.

[クレープ紙の内面(表面)への印刷による特有の効果]
実施の形態2の積層紙10によれば、一対のクレープ紙1の間に不織布2を介装して、前記熱融着部1により、不織布2に対してクレープ紙1をそれぞれ熱融着して固定するときに、クレープ紙1が不織布2に対してより確実かつ強固に接着されることを、本発明者は実験により確認している。これに加え、実施の形態2のように、クレープ紙1の内面に印刷部の印刷層1aを設ける場合、印刷層1aを設ける(即ち、印刷インキによる印刷を施す)クレープ紙1の内面が、平滑度の高い前記表面となるため、所望の模様部13や広告部14の印刷をより良好な状態で行うことができ、印刷品質をより向上することができる。また、実施の形態2では、印刷部がクレープ紙1の内面に設けられるため、印刷部が、使用者の手指や肌(皮膚)に接触することがないため、印刷インキに直接接触することに関する使用者の不安感をなくし、また、印刷インキに起因する健康上の問題を確実に防止することができる。なお、積層紙10に印刷部を設ける場合、実施の形態2のように、積層紙10の外層となるクレープ紙1に印刷部を設けるより、実施の形態1のように、積層紙10の中間層(即ち、内層)となる不織布2に印刷部を設ける方が、印刷品質の点では好ましい。
[Unique effect of printing on the inner surface (front surface) of crepe paper]
According to the laminated paper 10 of the second embodiment, the non-woven fabric 2 is interposed between the pair of crepe papers 1, and the crepe paper 1 is heat-sealed to the non-woven fabric 2 by the heat-sealing section 1. The present inventor has confirmed by experiments that the crepe paper 1 is more surely and firmly adhered to the nonwoven fabric 2 when it is fixed. In addition to this, when the printing layer 1a of the printing portion is provided on the inner surface of the crepe paper 1 as in the second embodiment, the inner surface of the crepe paper 1 provided with the printing layer 1a (that is, printing with printing ink) is Since the surface has high smoothness, the desired pattern portion 13 and the advertisement portion 14 can be printed in a better condition, and the print quality can be further improved. Further, in the second embodiment, since the printing portion is provided on the inner surface of the crepe paper 1, the printing portion does not come into contact with the user's finger or skin (skin), and thus the printing ink comes into direct contact. The user's anxiety can be eliminated, and health problems caused by the printing ink can be reliably prevented. When the printed portion is provided on the laminated paper 10, as in the second embodiment, the printed portion is provided on the crepe paper 1 which is the outer layer of the laminated paper 10, and thus the intermediate portion of the laminated paper 10 is provided as in the first embodiment. It is preferable in terms of print quality to provide the printed portion on the nonwoven fabric 2 that is a layer (that is, the inner layer).

[クレープ紙、不織布、及び積層紙の各厚み]
実施の形態2の積層紙10の場合、クレープ紙1の厚み、不織布2の厚み、及び、積層紙10の全体の厚みは、実施の形態1の場合と同様に設定することができる。
[Each thickness of crepe paper, non-woven fabric, and laminated paper]
In the case of the laminated paper 10 of the second embodiment, the thickness of the crepe paper 1, the thickness of the nonwoven fabric 2, and the total thickness of the laminated paper 10 can be set in the same manner as in the case of the first embodiment.

実施の形態3(着色部を中間層シートに設けてなる積層紙)
[積層紙の全体構成及び中間層シートとしての非透過性シートの構成]
図5に示すように、実施の形態1の例では、積層紙10は、三層構造で、かつ、中間層シートとしての不織布2の表面に印刷部を設けた構成となっており、図6に示すように、実施の形態2では、積層紙10は、三層構造で、かつ、外層シートとしてのクレープ紙1の内面に印刷部を設けた構成となっているが、実施の形態3では、図7に示すように、実施の形態3の三層構造の積層紙10は、中間層シートを合成樹脂フィルム製の非透過性シート5(例えば、非透水性シート又は耐水シート)により構成し、この非透過性シート5の表面に印刷部の印刷層5aを設けている。即ち、実施の形態3では、積層紙10は、外層シートとしての一対のクレープ紙1と、前記一対のクレープ紙1の間に積層状態で配設される1枚の中間層シートとしての非透過性シート5とからなる複数層構造(三層構造)を有し、その内部の面として(即ち、積層紙10の内部の面として)、前記非透過性シート5の表面に前記印刷部を設け、前記クレープ紙1を前記非透過性シート5に対して前記熱融着部1により熱融着及び圧着して接着したことを特徴としている。前記非透過性シート5としては、例えば、一般的にビニルシート又はビニルフィルムと呼ばれるものの他、ポリ塩化ビニル樹脂製の樹脂フィルムや樹脂シート、ポリオレフィン樹脂製(ポリエチレン樹脂製、ポリプロピレン樹脂製等)の樹脂フィルムや樹脂シート等を好適に使用することができる。また、非透過性シート5の厚みは、例えば、0.1mm〜0.2mmの範囲内の所定厚みとすることが好ましい。なお、前記非透過性シート5としての非透水性シートは、水分の透過を遮断することを主機能とするが、非透過性シートは、油分の透過を遮断する非透過性シート(以下、「非透油性シート」という。)により構成してもよい。また、本願書類中では、単に「非透過性シート」という場合は、前記非透水性シートの他に前記非透油性シートも含み、また、他の液体や一部の気体の透過をも遮断するものも含む。即ち、本発明において、非透過性シートとは、前記中間層シートとして、水分及び/又は油分の透過を遮断する合成樹脂製のシート状又はフィルム状をなすものであればよい。
Embodiment 3 (laminated paper in which a colored portion is provided on an intermediate layer sheet)
[Overall structure of laminated paper and structure of non-permeable sheet as intermediate layer sheet]
As shown in FIG. 5, in the example of the first embodiment, the laminated paper 10 has a three-layer structure, and has a configuration in which a printed portion is provided on the surface of the nonwoven fabric 2 as the intermediate layer sheet. As shown in FIG. 2, in the second embodiment, the laminated paper 10 has a three-layer structure, and the crepe paper 1 as the outer layer sheet is provided with the printing portion on the inner surface thereof. As shown in FIG. 7, in a laminated paper 10 having a three-layer structure according to the third embodiment, the intermediate layer sheet is composed of a non-permeable sheet 5 (for example, a non-permeable sheet or a waterproof sheet) made of a synthetic resin film. The printing layer 5a of the printing portion is provided on the surface of the non-transmissive sheet 5. That is, in the third embodiment, the laminated paper 10 includes a pair of crepe papers 1 as outer layer sheets, and a non-transparent sheet as an intermediate layer sheet arranged in a laminated state between the pair of crepe papers 1. A multi-layered structure (three-layered structure) composed of the non-transparent sheet 5 and the printed portion provided on the surface of the non-transmissive sheet 5 as an inner surface thereof (that is, as an inner surface of the laminated paper 10). The crepe paper 1 is bonded to the non-permeable sheet 5 by heat fusion and pressure bonding by the heat fusion unit 1. Examples of the non-permeable sheet 5 include those generally called vinyl sheets or vinyl films, resin films or resin sheets made of polyvinyl chloride resin, and polyolefin resin (polyethylene resin, polypropylene resin, etc.). A resin film, a resin sheet, etc. can be used conveniently. Further, the non-permeable sheet 5 preferably has a predetermined thickness within a range of 0.1 mm to 0.2 mm, for example. The non-permeable sheet as the non-permeable sheet 5 has a main function of blocking the permeation of moisture, but the non-permeable sheet is a non-permeable sheet that blocks the permeation of oil (hereinafter, “ It may be constituted by a non-oil-permeable sheet). Further, in the present document, when simply referred to as “non-permeable sheet”, the non-permeable sheet is included in addition to the non-permeable sheet, and it also blocks transmission of other liquids and some gases. Including things. That is, in the present invention, the non-permeable sheet may be a sheet or film made of synthetic resin that blocks the permeation of water and/or oil as the intermediate layer sheet.

[非透過性シートによる特有の効果]
実施の形態3の積層紙10によれば、中間層シートとしての非透水性シートや非透油性シートを含む非透過性シート5が、水分や油分の透過を遮断するため、積層紙10を、紙おしぼりのような代表的な製品のほか、水分や油分が付着した物体や物品を一時的又は長期的に包装するための包装紙等に適用することができ、積層紙10としての用途を大きく拡大することができる。
[Unique effect of non-permeable sheet]
According to the laminated paper 10 of the third embodiment, the non-permeable sheet 5 including the water-impermeable sheet and the oil-impermeable sheet as the intermediate layer sheet blocks the permeation of moisture and oil, so that the laminated paper 10 is In addition to typical products such as paper towels, it can be applied to wrapping paper for temporarily or long-term wrapping of objects or articles to which moisture or oil has adhered, and is widely used as the laminated paper 10. Can be expanded.

[実施の形態1〜3の積層紙の発明の範囲]
ところで、上記実施の形態1〜3の積層紙10の発明は、積層紙10の内面側(中間層シート又は外層シートの内面)に印刷部を設けた点に主要な特徴がある。即ち、実施の形態1〜3の積層紙10の発明は、このような印刷部を備える限りにおいて、印刷部以外の構成(熱融着部等の構成)を上記実施の形態のものと異なる構成とすることができる。即ち、積層紙10は、外層シートと中間層シートとからなる複数層構造を有し、その内面側に前記印刷部を備える限りにおいて、熱融着部の構成や他の要素又は部分の構成を任意の構成とすることができる。例えば、本発明の印刷部を備える積層紙は、熱融着部列を、上記実施の形態1のような破線状とする以外に、他の構成の波線状としたり、点線状としたり、一点鎖線や二点鎖線等の鎖線からなる鎖線状としたりすることもでき、或いは、ジグザグ状、千鳥状等の線状とすることもでき、更には、実線からなる直線状とすることもでき、或いは、ドット状の熱融着部を散在させた積層紙に具体化することもできる。しかし、積層紙の含水後に積層紙の全体にわたって十分な膨張効果を得て使用時のボリューム感を出すためには、熱融着部列は、上記実施の形態のように、破線状(又は鎖線状)の直線状とすることが好ましい。
[Scope of Invention of Laminated Paper of Embodiments 1 to 3]
By the way, the invention of the laminated paper 10 of Embodiments 1 to 3 is characterized mainly in that a printing portion is provided on the inner surface side of the laminated paper 10 (the inner surface of the intermediate layer sheet or the outer layer sheet). That is, the invention of the laminated paper 10 of Embodiments 1 to 3 is different from that of the above-mentioned embodiment in the configuration other than the printing unit (the configuration of the heat-sealing unit or the like) as long as such a printing unit is provided. Can be That is, the laminated paper 10 has a multi-layered structure including an outer layer sheet and an intermediate layer sheet, and as long as the inner surface side is provided with the printing section, the laminated sheet 10 may have the configuration of the heat-sealing portion or the configuration of other elements or portions. It can have any configuration. For example, in the laminated paper provided with the printing unit of the present invention, in addition to the heat-sealing unit row having the broken line shape as in the first embodiment, it may have a wavy line shape of another configuration, a dotted line shape, or a single point. It can also be a chain line consisting of a chain line such as a chain line or a two-dot chain line, or can be a zigzag shape, a linear shape such as a zigzag shape, and can also be a linear shape consisting of a solid line, Alternatively, it can be embodied as a laminated paper in which dot-shaped heat-sealed portions are scattered. However, in order to obtain a sufficient expansion effect over the entire laminated paper after the laminated paper has been hydrated and to give a volume feeling during use, the heat-sealing portion row has a broken line shape (or a chain line) as in the above embodiment. It is preferable that the shape is a linear shape.

[印刷部を設けない積層紙の発明]
一方、上記実施の形態1で説明した積層紙10の構成のうち、以下の構成は、その構成単独でも従来技術から見て新規性及び進歩性を備えている。即ち、上記のように印刷部を備える積層紙の発明(以下、「第1の積層紙の発明」という。)の他、不織布の厚みを前記所定範囲内の厚みとし、かつ、クレープ紙の厚みを前記所定範囲内の厚みとする積層紙の発明(以下、「第2の積層紙の発明」という。)、並びに、前記幅方向の熱融着部間隔をクレープ紙のクレープ率に応じて前記所定範囲内とする積層紙の発明(以下、「第3の積層紙の発明」という。)は、その発明自体でも(即ち、印刷部を備えない場合でも)、従来技術から見て新規性及び進歩性を備えている。
[Invention of laminated paper without printing section]
On the other hand, among the configurations of the laminated paper 10 described in the first embodiment, the following configurations have novelty and inventive step in view of the conventional art even when the configurations are independent. That is, in addition to the invention of the laminated paper having the printing section as described above (hereinafter referred to as "the invention of the first laminated paper"), the thickness of the non-woven fabric is set within the predetermined range, and the thickness of the crepe paper is set. According to the invention of a laminated paper having a thickness within the predetermined range (hereinafter referred to as "the invention of a second laminated paper"), and the width of the heat-sealing portion according to the crepe ratio of the crepe paper. The invention of a laminated paper within a predetermined range (hereinafter referred to as “the invention of a third laminated paper”) is novel in view of the prior art as well as the invention itself (that is, even when the printing unit is not provided). It has an inventive step.

[第2の積層紙の発明(クレープ紙の厚み範囲及び不織布の厚み範囲)]
具体的には、前記第2の積層紙の発明は、一対の外層シートとしてのクレープ紙と、前記クレープ紙の間に積層状態で配設される熱融着性の中間層シートとからなり、前記クレープ紙のクレープ皺の延びる方向と直交する方向に延びる線状の熱融着部列により、前記クレープ紙を前記中間層シートに熱融着して積層構造とし、更に、前記クレープ紙は、20〜50g/mの範囲内の厚みを有し、かつ、前記不織布は、坪量で、15〜25g/mの範囲内の厚みを有することを特徴とする。
[Invention of Second Laminated Paper (Crepe Paper Thickness Range and Nonwoven Fabric Thickness Range)]
Specifically, the invention of the second laminated paper comprises a pair of outer layer sheets of crepe paper, and a heat-fusible intermediate layer sheet arranged in a laminated state between the crepe papers, By a linear heat-sealing portion row extending in a direction orthogonal to the direction in which the crepe wrinkles of the crepe paper, the crepe paper is heat-sealed to the intermediate layer sheet to form a laminated structure, and further, the crepe paper is it has a thickness in the range of 20 to 50 g / m 2, and said non-woven fabric, basis weight, and having a thickness in the range of 15-25 g / m 2.

[第3の積層紙の発明(クレープ紙のクレープ率と幅方向の熱融着部間隔)]
また、前記第3の積層紙の発明は、一対の外層シートとしてのクレープ紙と、前記クレープ紙の間に積層状態で配設される熱融着性の中間層シートとからなり、前記クレープ紙のクレープ皺の延びる方向と直交する方向に延びる線状の熱融着部列により、前記クレープ紙を前記中間層シートに熱融着して積層構造とし、更に、隣接する前記熱融着部列の幅方向中心線の間の間隔である幅方向の熱融着部間隔を、前記クレープ紙のクレープ率の範囲に応じた所定範囲内の任意の値に設定し、前記クレープ紙のクレープ率が20%〜26%の範囲内の場合、前記幅方向の熱融着部間隔は、10mm〜15mmの範囲内に設定し、前記クレープ紙のクレープ率が26%〜30%の範囲内の場合、前記幅方向の熱融着部間隔は、15〜25mmの範囲内に設定したことを特徴とする。
[Invention of third laminated paper (crepe ratio of crepe paper and distance between heat-sealing parts in width direction)]
The invention of the third laminated paper comprises a pair of outer layer sheets of crepe paper, and a heat-fusible intermediate layer sheet arranged in a laminated state between the crepe papers. Of the crepe wrinkles by a linear heat-sealing portion row extending in a direction orthogonal to the extending direction, the crepe paper is heat-sealed to the intermediate layer sheet to form a laminated structure, and further, the adjacent heat-sealing portion rows. The width of the heat-sealing portion in the width direction, which is the distance between the center lines of the width direction, is set to an arbitrary value within a predetermined range according to the range of the crepe ratio of the crepe paper, and the crepe ratio of the crepe paper is When it is in the range of 20% to 26%, the width of the heat-sealing portion is set in the range of 10 mm to 15 mm, and when the crepe ratio of the crepe paper is in the range of 26% to 30%, The width of the heat-sealing portion is set within a range of 15 to 25 mm.

実施の形態4(改良不織布を中間層シートに有する積層紙)
[不織布の構成]
本発明の積層紙は、中間層シートとしての不織布の構成に特徴を備えるものとして、以下のように具体化することもできる。詳細には、実施の形態4の積層紙では、不織布は、伸縮率の高い不織布からなり、具体的には、後述するように、いわゆる芯鞘構造繊維を使用して製造された不織布からなる。即ち、従来の不織布は、いわゆるパルプ不織布からなり、木質パルプを粉砕して得た線維状物をウエブ状に集積して互いに接合し、シート状部とすることで製造している。また、従来の紙おしぼりは、一般には、不織布から製造され、この不織布として、坪量45〜70g/cm2でシート状にしたものを使用している。
Embodiment 4 (laminated paper having an improved nonwoven fabric in an intermediate layer sheet)
[Nonwoven fabric composition]
The laminated paper of the present invention can be embodied as follows, which is characterized by the constitution of the nonwoven fabric as the intermediate layer sheet. Specifically, in the laminated paper according to the fourth embodiment, the non-woven fabric is a non-woven fabric having a high expansion and contraction rate, and specifically, a non-woven fabric manufactured using so-called core-sheath structure fibers, as described later. That is, the conventional non-woven fabric is made of a so-called pulp non-woven fabric, which is manufactured by collecting fibrous substances obtained by crushing wood pulp in a web form and bonding them to each other to form a sheet-like portion. Further, the conventional paper towels are generally manufactured from a non-woven fabric, and the non-woven fabric is used in the form of a sheet having a basis weight of 45 to 70 g/cm 2.

[本発明の不織布の種類(製法による種類)]
これに対し、例えば、図5の断面図を使用して説明すると、実施の形態4の積層紙10は、中間層シートとして、空気を含むエアスルータイプ(サーマルボンドにより製造したもの)の不織布を使用することができる。こうすると、積層紙10が、全体として厚みがある一方で伸縮性に富む構造となると共に、手触り感が良く、かつ、熱融着性を有する構造となる。更に、実施の形態4の積層紙の不織布は、いわゆる芯鞘構造複合繊維を原料として製造した不織布からなる。この芯鞘複合繊維は、短繊維の合成繊維で、PE/PP、PE/PETの複合繊維)を、乾式法等で製造する不織布のウエブ(フリースと呼ばれることもある繊維の集積層)の原料繊維とする共に、繊維同士の結合方法としては、サーマルボンド法のうち、エアスルー法を使用する(即ち、熱風をウエブの厚み方向に表面から裏面へと通過させることにより、複合繊維の鞘部分の樹脂を溶融して繊維間を接着する)ことにより接着したものである。また、この芯鞘構造繊維は、外側の鞘がPE(ポリエチレン)で、内側(中心部)の芯がPET(ポリエチレンテレフタレート)となっている繊維である。この不織布は、繊維間結合に接着剤を使用しないためソフトな風合いを有するが、吸水性はないため、実施の形態1〜3の積層紙10のように、不織布2に印刷部を設けた場合、積層紙10に含水したときに、不織布2が含水により表面の印刷層2aの印刷インキに水分を供給することがない。したがって、この積層紙10は、不織布2の印刷部の印刷品質を良好に維持することができるという追加の特有の効果を発揮する。また、この不織布は、鞘部分のPEが低温で軟化して、前記積層紙10の熱融着部11によりクレープ紙1を良好に接着することができる一方で、芯部分のPETが繊維自体の強度を維持して不織布の全体の強度を維持する。即ち、この不織布は、芯鞘構造の鞘部分が接着力を発現し、クレープ紙に対する接着剤として機能する一方で、芯部分が強度維持に貢献する。
[Type of nonwoven fabric of the present invention (type according to manufacturing method)]
On the other hand, for example, using the cross-sectional view of FIG. 5, the laminated paper 10 of the fourth embodiment uses an air-through type nonwoven fabric (produced by thermal bonding) containing air as the intermediate layer sheet. can do. By doing so, the laminated paper 10 has a structure that is thick as a whole and rich in elasticity, and has a good feel to the touch and a heat-fusible property. Furthermore, the nonwoven fabric of the laminated paper of Embodiment 4 is made of a so-called core-sheath structure composite fiber as a raw material. This core-sheath composite fiber is a synthetic fiber of short fibers, and is a raw material of a nonwoven web (an accumulation layer of fibers sometimes called fleece) of a PE/PP or PE/PET composite fiber produced by a dry method or the like. Along with the fibers, the air-through method among the thermal bond methods is used as the method for binding the fibers to each other (that is, by passing hot air from the front surface to the back surface in the thickness direction of the web, The resin is melted and the fibers are bonded together). Further, this core-sheath structure fiber is a fiber in which the outer sheath is PE (polyethylene) and the inner (center) core is PET (polyethylene terephthalate). This non-woven fabric has a soft texture because it does not use an adhesive for fiber-to-fiber bonding, but since it does not absorb water, when a printed portion is provided on the non-woven fabric 2 like the laminated paper 10 of the first to third embodiments. When the laminated paper 10 is hydrated, the nonwoven fabric 2 does not supply moisture to the printing ink of the printing layer 2a on the surface due to hydration. Therefore, the laminated paper 10 exhibits an additional unique effect that the printing quality of the printing portion of the nonwoven fabric 2 can be maintained excellently. Further, in this non-woven fabric, the PE of the sheath portion is softened at a low temperature, and the crepe paper 1 can be favorably adhered by the heat fusion portion 11 of the laminated paper 10, while the PET of the core portion is made of the fiber itself. Maintain strength to maintain the overall strength of the nonwoven. That is, in this nonwoven fabric, the sheath portion of the core-sheath structure exerts an adhesive force and functions as an adhesive for crepe paper, while the core portion contributes to maintaining the strength.

なお、この不織布の芯鞘構造繊維の材料としては、ポリエチレン(PE)は、融点約120℃近辺のもの(即ち、融点95〜130度又は114〜126℃の低密度PE、融点120〜140℃又は126〜137℃の高密度PE)を使用することができ、通常は、低密度PEを使用するが、融点が約120℃近辺となる密度のPEを使用すればよい。一方、ポリプロピレン(PP)は、融点約140℃近辺のもの(即ち、低融点型となるPP)を使用することができる。なお、PPには、共重合のランダムPP、共重合のブロックPP、単独重合のホモPPの3種類があるが、ホモPPは、160〜165℃の融点を有し、ブロックPPで合成融点が140〜150℃(或いは、160〜165℃)となるため、ブロックPPの場合、低融点側のものを使用する。また、最も融点の低いランダムPPは、約135〜145℃の融点のもの、或いは、135〜150℃の融点のものを使用することができる。本実施の形態では、不織布の原料繊維のPPとしては、ランダムPPを使用することができ、この場合、ランダムPPの融点は125℃の低融点となる。   As the material of the core-sheath structure fiber of this non-woven fabric, polyethylene (PE) has a melting point of about 120°C (that is, low-density PE having a melting point of 95 to 130 degrees or 114 to 126°C, melting point of 120 to 140°C). Alternatively, a high-density PE of 126 to 137° C.) can be used, and a low-density PE is usually used, but a PE having a density of about 120° C. may be used. On the other hand, polypropylene (PP) having a melting point of about 140° C. (that is, PP having a low melting point) can be used. There are three types of PP, copolymerized random PP, copolymerized block PP, and homopolymerized homo PP. Homo PP has a melting point of 160 to 165° C., and the block PP has a synthetic melting point. Since the temperature is 140 to 150° C. (or 160 to 165° C.), in the case of the block PP, the one having a low melting point is used. As the random PP having the lowest melting point, one having a melting point of about 135 to 145° C. or one having a melting point of 135 to 150° C. can be used. In the present embodiment, random PP can be used as the PP of the raw material fibers of the nonwoven fabric, and in this case, the melting point of the random PP is as low as 125°C.

[不織布の種類(融点による種類)]
本発明の積層紙において、中間層シートとしての不織布を任意の不織布とした場合、融点の関係でクレープ紙が良好に接着しない不織布もある。したがって、積層紙10の不織布2としては、積層紙の製造装置における熱融着部列11による熱融着時の所定の加熱温度で、クレープ紙1が不織布2の熱融着成分(例えば、芯鞘構造繊維の鞘部分のPE等)によって不織布2に確実に接着するような融点を有する不織布を使用する。特に、実施の形態1〜3の積層紙10を含め、本発明の積層紙は、線状の熱融着部列のみの接着力によって一対のクレープ紙を不織布に接着する構造のため、かかる少ない接着面積で十分なクレープ紙と不織布との間で十分な接合力が得られるよう、不織布の種類を選定している。このような不織布としては、ポリエステル系複合繊維としての芯鞘型複合繊維であって、不織布用熱融着繊維を使用して製造された不織布を使用することができる。例えば、この場合の不織布としては、繊度2.2dtex、カット長5mm又は10mm、鞘成分軟化点約110℃の芯鞘型複合繊維により製造した不織布を使用したり、繊度1.7dtex、カット長5mm、鞘成分軟化点約110℃の芯鞘型複合繊維により製造した不織布を使用したり、繊度2.2dtex、カット長5mm、鞘成分軟化点約130℃の芯鞘型複合繊維により製造した不織布を使用したりすることができる。或いは、上記の芯鞘型複合繊維の2種類以上を適宜混合して原料繊維とした不織布を使用してもよい。
[Type of non-woven fabric (type according to melting point)]
In the laminated paper of the present invention, when the nonwoven fabric as the intermediate layer sheet is an arbitrary nonwoven fabric, there are some nonwoven fabrics in which the crepe paper does not adhere well due to the melting point. Therefore, as the non-woven fabric 2 of the laminated paper 10, the crepe paper 1 is a heat-sealing component (for example, a core) of the non-woven fabric 2 at a predetermined heating temperature at the time of heat-sealing by the heat-sealing unit row 11 in the laminated-paper manufacturing apparatus. A non-woven fabric having a melting point that surely adheres to the non-woven fabric 2 by (for example, PE of the sheath portion of the sheath structure fiber) is used. In particular, the laminated paper of the present invention, including the laminated paper 10 of Embodiments 1 to 3, has a structure in which a pair of crepe papers are bonded to a nonwoven fabric by the adhesive force of only the linear heat-sealing portion row, and thus the number of the laminated papers is small. The type of non-woven fabric is selected so that a sufficient bonding force can be obtained between the crepe paper and the non-woven fabric with a sufficient adhesive area. As such a non-woven fabric, it is possible to use a non-woven fabric which is a core-sheath type composite fiber as a polyester-based composite fiber and which is manufactured by using a heat fusion fiber for a non-woven fabric. For example, as the non-woven fabric in this case, a non-woven fabric made of core-sheath type composite fibers having a fineness of 2.2 dtex, a cut length of 5 mm or 10 mm, and a softening point of the sheath component of about 110° C. may be used, or a fineness of 1.7 dtex, a cut length of 5 mm. A non-woven fabric made of core-sheath type composite fibers having a sheath component softening point of about 110° C. is used, or a non-woven fabric made of core-sheath type conjugate fibers having a fineness of 2.2 dtex, a cut length of 5 mm, and a sheath component softening point of about 130° C. It can be used. Alternatively, a nonwoven fabric may be used as a raw material fiber by appropriately mixing two or more kinds of the above core-sheath type composite fibers.

実施の形態5(積層紙の製造装置)
上記実施の形態1〜3の積層紙10の発明を含め、本発明の積層紙は、以下に説明する積層紙の製造装置を使用して製造することが好ましい。
Embodiment 5 (laminated paper manufacturing apparatus)
The laminated paper of the present invention, including the invention of the laminated paper 10 of the first to third embodiments, is preferably manufactured using the laminated paper manufacturing apparatus described below.

[製造装置の構成]
図9に示すように、実施の形態5の積層紙の製造装置は、並設した3個の支持ローラ51,52,53に、それぞれ、前記一対のクレープ紙の一方のクレープ紙の原料シート(クレープ紙原料シート)となるロール状クレープ紙21と、前記不織布の原料シート(不織布原料シート)となるロール状不織布22と、前記一対のクレープ紙の他方のクレープ紙の原料シート(クレープ紙原料シート)となる他方のロール状クレープ紙23とを、それぞれ、回転供給自在に支持している。また、一方のロール状クレープ紙21、ロール状不織布22、及び、他方のロール状クレープ紙23から引き出された一方のクレープ紙1、不織布2、及び、他方クレープ紙1は、それぞれ、積層した状態で(即ち、三層の積層状態で)積層紙10の原料シート(積層紙原料シート)を構成する。この積層紙原料シートは、第1の案内ローラ61により折り返され、一方の圧着ローラとしての第1のヒートシールローラ70と他方の圧着ローラとしての第2のヒートシールローラ80との間に案内及び導入される。なお、前記積層紙原料シートは、前記第1の案内ローラ61から第2のヒートシールローラ80を折り返して、第2の案内ローラ62により案内されて、前記第1のヒートシールローラ70と第2のヒートシールローラ80との間に挿入される。この第1のヒートシールローラ70と第2のヒートシールローラ80との間に挿入される前の段階の積層紙原料シートは、クレープ紙1と不織布2とが熱融着されていない状態の熱融着前積層紙10Xとなっている。
[Configuration of manufacturing equipment]
As shown in FIG. 9, in the laminated paper manufacturing apparatus according to the fifth embodiment, one of the pair of crepe papers is used as a raw material sheet ( Roll-shaped crepe paper 21 serving as a crepe paper raw material sheet, roll non-woven fabric 22 serving as the non-woven fabric raw material sheet (nonwoven fabric raw material sheet), and the other crepe paper raw material sheet (crepe paper raw material sheet) of the pair of crepe papers ) And the other roll-shaped crepe paper 23, which is the same as the above), are rotatably supported. Further, the one crepe paper 21, the non-woven fabric 22 on one side, and the one crepe paper 1, the non-woven fabric 2 drawn on from the other crepe paper 23 on the other side, and the other crepe paper 1 are laminated, respectively. (I.e., in a laminated state of three layers) constitutes a raw material sheet (laminated paper raw material sheet) of the laminated paper 10. This laminated paper raw material sheet is folded back by the first guide roller 61, and is guided between the first heat-sealing roller 70 as one pressure-bonding roller and the second heat-sealing roller 80 as the other pressure-bonding roller. be introduced. The laminated paper raw material sheet is folded back from the first guide roller 61 to the second heat seal roller 80 and guided by the second guide roller 62 so that the first heat seal roller 70 and the second heat seal roller 70 Of the heat seal roller 80. The laminated paper raw material sheet at a stage before being inserted between the first heat seal roller 70 and the second heat seal roller 80 has a heat in a state where the crepe paper 1 and the nonwoven fabric 2 are not heat-sealed. It is the laminated paper 10X before fusing.

次に、これら第1及び第2のヒートシールローラ70,80間で、積層状態のクレープ紙1及び不織布2が熱融着され、前記熱融着部11を有する積層紙10が形成される。この熱融着後の段階の積層紙原料シートは、クレープ紙1と不織布2とが熱融着された状態の熱融着後積層紙10Yとなっている。そして、第1及び第2のヒートシールローラ70,80から導出された長尺状の(切断前の原紙としての)熱融着後積層紙10Yは、第3の案内ローラ63及び第4の案内ローラ64により折り返され、巻取ローラ55に案内される。巻取ローラ55は、熱融着後積層紙10Yを巻き取って、ロール状積層紙10Rとする。このロール状積層紙10Rは、巻取ローラ55から取り外されて、紙おしぼり等の原紙として使用される。なお、第4の案内ローラ64と巻取ローラ55との間には、スリッタが配置され、熱融着後積層紙10Rを幅方向に複数に切断し、所定幅の積層紙10を複数並設して巻取りローラに巻き取るようになっている。   Next, the crepe paper 1 and the non-woven fabric 2 in a laminated state are heat-sealed between the first and second heat-sealing rollers 70 and 80 to form the laminated paper 10 having the heat-sealed portion 11. The laminated paper raw material sheet at the stage after the heat fusion is the heat fusion laminated paper 10Y in a state where the crepe paper 1 and the nonwoven fabric 2 are heat fused. The long heat-bonded laminated paper 10Y (as the base paper before cutting) derived from the first and second heat seal rollers 70 and 80 is the third guide roller 63 and the fourth guide. It is folded back by the roller 64 and guided by the winding roller 55. The take-up roller 55 takes up the laminated paper 10Y after heat fusion to form a roll-shaped laminated paper 10R. The roll-shaped laminated paper 10R is removed from the winding roller 55 and used as a base paper for a paper towel or the like. A slitter is disposed between the fourth guide roller 64 and the take-up roller 55, and the laminated paper 10R after heat fusion is cut into a plurality of pieces in the width direction, and a plurality of laminated paper sheets 10 having a predetermined width are arranged side by side. Then, it is wound around the winding roller.

[ヒートシールローラ]
次に、第1及び第2のヒートシールローラ70,80について、図10〜図13にしたがって詳細に説明する。図10は、図9の第1及び第2のヒートシールローラ70,80を上面側から見た状態を示し、第1及び第2のヒートシールローラ70,80は、軸心が互いに平行となるよう、熱融着前積層紙10Xの供給方向の前後に並設して対向配置されている。また、第1及び第2のヒートシールローラ70,80は、同一の所定のローラ長L(例えば、1200mm〜1500mmの範囲内の任意の値の軸長)を有するとともに、同一の所定のローラ径D(例えば、180mm〜300mmの範囲内の任意の値の直径)を有している。
[Heat seal roller]
Next, the first and second heat seal rollers 70 and 80 will be described in detail with reference to FIGS. FIG. 10 shows a state in which the first and second heat seal rollers 70 and 80 of FIG. 9 are viewed from the upper surface side, and the axes of the first and second heat seal rollers 70 and 80 are parallel to each other. As described above, they are arranged side by side in front of and in the rear of the supply direction of the laminated paper 10X before heat fusion so as to face each other. The first and second heat seal rollers 70 and 80 have the same predetermined roller length L (for example, an axial length of an arbitrary value within the range of 1200 mm to 1500 mm) and have the same predetermined roller diameter. D (for example, a diameter of any value within the range of 180 mm to 300 mm).

[第1のヒートシールローラ]
図9及び図10に示すように、第1のヒートシールローラ70は、前記所定のローラ径Dの円筒状に形成され、その周面に、一定幅のリング凹溝状をなす非圧着部71と、一定幅の破線凸リング状(又は破線凸条状)をなす熱圧着凸部72とを、その軸心方向に1つおきとなるよう互いに平行に並設配置している。図11に示すように、非圧着部71の各々は、第1のヒートシールローラ70の周面に沿って周方向に円弧状面として断続的に延びると共に、幅方向においては平坦面となる圧着面72aを有している。詳細には、熱圧着凸部72の各々は、第1のヒートシールローラ70の周面に沿って周方向に所定長さだけ直線的に延びる(熱圧着凸部72の周面としての)熱圧着面72aを、第1のヒートシールローラ70の周方向に一定間隔を置いて連続的に配置している。熱圧着凸部72の熱圧着面72aは、長さ方向には円弧状面(曲面)となるが、その円弧長は、前記熱融着部列11の第1の熱融着部11a又は第2の熱融着部11bの長さと同一長さに設定されている。また、熱圧着凸部72の熱圧着面72aは、幅方向には平坦面状となるが、その幅は、前記熱融着部列11の第1の熱融着部11a又は第2の熱融着部11bの幅と同一幅に設定されている。更に、各列の熱圧着凸部72の隣接する熱圧着面72aの間の間隙の間隔は、前記熱融着部列11の隣接する第1の熱融着部11a又は第2の熱融着部11bの間の間隙の間隔と同一寸法に設定されている。
[First heat seal roller]
As shown in FIGS. 9 and 10, the first heat-sealing roller 70 is formed in a cylindrical shape having the predetermined roller diameter D, and the peripheral surface thereof has a non-pressure-bonding portion 71 in the shape of a ring groove having a constant width. And a thermocompression-bonding convex portion 72 having a constant width and a broken-line convex ring shape (or a broken-line convex strip shape) are arranged in parallel in parallel with each other in the axial direction. As shown in FIG. 11, each of the non-bonding portions 71 intermittently extends along the circumferential surface of the first heat-sealing roller 70 as an arcuate surface in the circumferential direction, and becomes a flat surface in the width direction. It has a surface 72a. Specifically, each of the thermocompression-bonding convex portions 72 linearly extends along the circumferential surface of the first heat-sealing roller 70 by a predetermined length in the circumferential direction (as the circumferential surface of the thermocompression-bonding convex portion 72). The pressure bonding surfaces 72a are continuously arranged at regular intervals in the circumferential direction of the first heat seal roller 70. The thermocompression-bonding surface 72a of the thermocompression-bonding convex portion 72 is an arcuate surface (curved surface) in the length direction, and the arc length is the first heat-bonding portion 11a or the first heat-bonding portion 11a of the heat-bonding portion row 11. The length is set to be the same as the length of the second heat-sealing portion 11b. Further, the thermocompression bonding surface 72a of the thermocompression bonding convex portion 72 has a flat surface shape in the width direction, and the width thereof is the first thermal fusion bonding portion 11a or the second thermal fusion bonding portion 11a of the thermal fusion bonding portion row 11. It is set to have the same width as the width of the fused portion 11b. Further, the gap between the adjacent thermocompression bonding surfaces 72a of the thermocompression bonding protrusions 72 in each row is set such that the adjacent first thermal fusion bonding portion 11a or the second thermal fusion bonding in the thermal fusion bonding row 11 is arranged. The size is set to be the same as the gap between the portions 11b.

このように、第1のヒートシールローラ70は、破線凸リング状をなす熱圧着凸部72を周方向の全周に形成して、前記積層紙10の1列の熱融着部列11を形成するよう構成している。また、第1のヒートシールローラ70は、多数列の熱圧着凸部72を、前記積層紙10の多数列の熱融着部列11の幅方向の配置間隔と同一の一定間隔を置いて互いに平行となるよう、その軸心方向の全体にわたって連続的に並設配置している。これにより、第1のヒートシールローラ70は、隣接する熱圧着凸部72の間に、それぞれ、リング凹溝状をなす非圧着部71を有することになる。また、第1のヒートシールローラ70は、多数列の非圧着部71を、前記積層紙10の非融着部12と同一の一定間隔を置いて互いに平行となるよう、軸心方向の全体にわたって連続的に並設配置している。更に、第1のヒートシールローラ70において、隣接する列の熱圧着凸部72の熱圧着面72aは、一方の熱圧着凸部72の熱圧着面72aの長さ方向の中心位置が、他方の熱圧着凸部72の隣接する熱圧着面72aの間の間隙の中間位置にくるよう、第1のヒートシールローラ70の周方向における位置を互いにずらして配置されている。これにより、図11及び図12及び図13に示すように、熱圧着凸部72は、前記積層紙10の第1の列の熱融着部列11Aに対応する第1の列の熱圧着凸部72Aと、第2の列の熱融着部列11Bに対応する第2の列の熱圧着凸部72Bとから構成される。そして、第1の列の熱圧着凸部72Aは、第1の列の熱融着部列11Aの第1の熱融着部11aに対応して、熱圧着面72aを第1のヒートシールローラ70の周方向に配置し、第2の列の熱圧着凸部72Bは、第2の列の熱融着部列11Bの第2の熱融着部11bに対応して、熱圧着面72aを第1のヒートシールローラ70の周方向に配置している。   As described above, the first heat-sealing roller 70 forms the thermocompression-bonding convex portion 72 in the shape of a broken-line convex ring on the entire circumference in the circumferential direction, so that the one row of the heat-sealing portion 11 of the laminated paper 10 is formed. It is configured to form. In addition, the first heat-sealing roller 70 has a plurality of rows of thermocompression-bonding convex portions 72 at a constant interval which is the same as the arrangement interval in the width direction of the plurality of rows of the heat-sealing portion 11 of the laminated paper 10. In order to be parallel, they are continuously arranged side by side over the entire axial direction. As a result, the first heat-sealing roller 70 has the non-pressure-bonding portions 71 each having a ring groove shape between the adjacent heat-pressure bonding convex portions 72. In addition, the first heat-sealing roller 70 has a large number of rows of non-pressing portions 71 in the axial direction so that they are parallel to each other at the same fixed intervals as the non-fusing portions 12 of the laminated paper 10. They are arranged side by side continuously. Further, in the first heat-sealing roller 70, the thermocompression-bonding surfaces 72a of the thermocompression-bonding convex portions 72 of the adjacent rows have the center position in the length direction of the thermocompression-bonding surface 72a of the one thermocompression-bonding convex portion 72 as compared with the other. The positions of the first heat seal roller 70 in the circumferential direction are offset from each other so as to come to an intermediate position of the gap between the adjacent thermocompression bonding surfaces 72a of the thermocompression bonding convex portions 72a. As a result, as shown in FIGS. 11, 12, and 13, the thermocompression-bonding protrusions 72 are formed in the first row of the thermocompression-bonding protrusions corresponding to the first row of the heat-bonding section 11A. The section 72A and the second row of thermocompression bonding projections 72B corresponding to the second row of heat-sealing section 11B. Then, the thermocompression-bonding convex portions 72A of the first row correspond to the first heat-bonding portions 11a of the heat-bonding portion row 11A of the first row, and the thermocompression-bonding surface 72a is formed on the first heat-sealing roller. Arranged in the circumferential direction of 70, the thermocompression-bonding convex portions 72B of the second row correspond to the second heat-fusion bonding portions 11b of the heat-fusion-bonding portion row 11B of the second row, and the thermocompression-bonding surfaces 72a are formed. It is arranged in the circumferential direction of the first heat seal roller 70.

また、図10に示すように、熱融着凸部72の熱圧着面72aは、平面視で直線的に伸びる(第2のヒートシールローラ70の周方向においてはその周面に沿って曲線的に延びる)直線細帯部72xと、直線細帯部72xの長さ方向両端の半円状の湾曲部72yとから構成される。これにより、ヒートシールローラ70の熱圧着凸部72の熱圧着面72aにより、積層紙原料シートのクレープ紙原料シートを不織布原料シートに熱圧着及び熱融着して得られる積層紙10の熱融着部列11の熱融着部11a,11bの各々は、各熱圧着面72aの外形に対応して、図1及び図2、並びに、図14に示すように、積層紙10の長さ方向に直線的に伸びる直線細帯状部分と、直線細帯状部分の長さ方向両端の半円状部分とから構成される。更に、図13に示すように、各熱圧着凸部72の熱圧着面72aの幅方向両側では、一対の側面72bが、熱圧着面72aと直交して延びている。   Further, as shown in FIG. 10, the thermocompression bonding surface 72a of the heat-sealing convex portion 72 extends linearly in a plan view (in the circumferential direction of the second heat seal roller 70, it is curved along the circumferential surface thereof). Straight strip portion 72x, and semicircular curved portions 72y at both ends in the length direction of the straight strip portion 72x. Thus, the thermocompression bonding surface 72a of the thermocompression-bonding convex portion 72 of the heat-sealing roller 70 thermocompresses and heat-bonds the crepe paper raw material sheet of the laminated paper raw material sheet to the nonwoven fabric raw material sheet to obtain the thermal fusion of the laminated paper 10. Each of the thermal fusion bonding parts 11a and 11b of the bonding part row 11 corresponds to the outer shape of each thermocompression bonding surface 72a, and as shown in FIGS. 1 and 2 and FIG. And a semicircular portion at both ends in the lengthwise direction of the linear strip portion. Further, as shown in FIG. 13, on both sides in the width direction of the thermocompression bonding surface 72a of each thermocompression bonding convex portion 72, a pair of side surfaces 72b extend orthogonal to the thermocompression bonding surface 72a.

[第2のヒートシールローラ]
一方、図9及び図10に示すように、第2のヒートシールローラ80は、前記所定のローラ径Dの円筒状に形成され、その周面に、一定幅のリング凹溝状をなす非圧着部81と、一定幅の凸リング状(又は凸条状)をなす熱圧着凸部82とを、その軸心方向に1つおきとなるよう互いに平行に並設配置している。図11に示すように、非圧着部81の各々は、第2のヒートシールローラ80の周面に沿って周方向に円弧状面として連続的に(即ち、第2のヒートシールローラ80の周面の全周にわたって)延びると共に、幅方向においては平坦面となる(熱圧着凸部82の周面としての)圧着面82aを有している。熱圧着凸部82の熱圧着面82aは、長さ方向には円弧状面(曲面)となる。また、熱圧着凸部82の熱圧着面82aは、幅方向には平坦面状となるが、その幅は、前記熱融着部11の第1の熱融着部11a又は第2の熱融着部11bの幅よりも大きな幅(即ち、第1のヒートシールローラ70の熱圧着凸部72の熱圧着面72aの幅よりも大きな幅)に設定されている。
[Second heat seal roller]
On the other hand, as shown in FIGS. 9 and 10, the second heat-sealing roller 80 is formed in a cylindrical shape having the predetermined roller diameter D, and has a ring-shaped groove having a constant width on its peripheral surface. The portions 81 and the thermocompression-bonding convex portions 82 having a constant width and having a convex ring shape (or a convex strip shape) are arranged in parallel in parallel with each other so that every other portion is in the axial direction. As shown in FIG. 11, each of the non-bonding portions 81 is continuously formed as an arcuate surface in the circumferential direction along the circumferential surface of the second heat seal roller 80 (that is, the circumference of the second heat seal roller 80). It has a crimping surface 82a that extends (over the entire circumference of the surface) and becomes a flat surface in the width direction (as the circumferential surface of the thermocompression-bonding convex portion 82). The thermocompression bonding surface 82a of the thermocompression bonding convex portion 82 is an arcuate surface (curved surface) in the length direction. Further, the thermocompression-bonding surface 82a of the thermocompression-bonding convex portion 82 has a flat surface shape in the width direction, and the width thereof is the first heat-melting portion 11a or the second heat-melting portion 11a of the heat-melting portion 11. The width is set to be larger than the width of the attachment portion 11b (that is, the width is larger than the width of the thermocompression bonding surface 72a of the thermocompression-bonding convex portion 72 of the first heat-sealing roller 70).

このように、第2のヒートシールローラ80は、第1のヒートシールローラ70の熱圧着凸部72と対向する位置に、それぞれ、凸リング状をなす熱圧着凸部82を周方向の全周にわたって形成している。これにより、第1のヒートシールローラ70の熱圧着凸部72と第2のヒートシールローラ80の熱圧着凸部82との間で、前記熱融着前積層紙10Xを挟持し、熱圧着凸部72の熱圧着面72aと熱圧着凸部82の熱圧着面82aとの間で、熱融着前積層紙10Xのクレープ紙1を不織布2に熱圧着及び熱融着することで、前記積層紙10の熱融着部列11を形成するようになっている。   As described above, the second heat-sealing roller 80 has the thermocompression-bonding convex portions 82 each having a convex ring shape at the positions facing the thermocompression-bonding convex portions 72 of the first heat-sealing roller 70 in the entire circumferential direction. Is formed over. Thereby, the pre-heat-fusing laminated paper 10X is sandwiched between the thermocompression-bonding convex portion 72 of the first heat-sealing roller 70 and the thermocompression-bonding convex portion 82 of the second heat-sealing roller 80, and the thermocompression-bonding convex portion is sandwiched. Between the thermocompression-bonding surface 72a of the portion 72 and the thermocompression-bonding surface 82a of the thermocompression-bonding convex portion 82, the crepe paper 1 of the laminated paper 10X before thermal fusion is thermocompression-bonded and heat-bonded to the nonwoven fabric 2 to form the laminate. The heat-fusing part row 11 of the paper 10 is formed.

更に、図13に示すように、第2のヒートシールローラ80の熱圧着凸部82の熱圧着面82aの幅は、第1のヒートシールローラ70の熱圧着凸部72の熱圧着面72aの幅よりも一定寸法だけ大きな幅に設定され、熱圧着凸部72の熱圧着面72aと熱圧着凸部82の熱圧着面82aとを対向して(積層紙10の熱融着部11の厚み分の隙間を置いて)略密接状態で配置したときに、熱圧着凸部72の熱圧着面72aの幅方向両側で、それぞれ、熱圧着凸部82の熱圧着面82aの幅方向両端部の一定幅部分が露出するようになっている。これにより、熱圧着凸部72の熱圧着面72aと熱圧着凸部82の熱圧着面82aとの間で、熱融着前積層紙10Xのクレープ紙1を不織布2に熱圧着及び熱融着するときに、熱圧着凸部72の熱圧着面72aの幅方向両端縁は、熱圧着凸部82の熱圧着面82aの上に配置されることになり、熱圧着凸部72の熱圧着面72aの幅方向両端縁から熱融着前積層紙10Xに加わる外力(特に、せん断力)を大きく低減することができる。即ち、仮に、熱圧着凸部72の熱圧着面72aの幅と熱圧着凸部82の熱圧着面82aの幅とを同一幅とした場合は、熱圧着凸部72の熱圧着面72aと熱圧着凸部82の熱圧着面82aとの間で、熱融着前積層紙10Xのクレープ紙1を不織布2に熱圧着及び熱融着するときに、熱圧着凸部72の熱圧着面72aの幅方向両端縁が、熱圧着凸部82の熱圧着面82aの幅方向両端縁と同一位置に配置されることになり、熱圧着凸部72の熱圧着面72aの幅方向両端縁から熱融着前積層紙10Xに加わる外力(特に、せん断力)が大きくなるため、熱融着前積層紙10X(特に、クレープ紙1)の一部を切断又は破損等する可能性がある。しかし、図13に示すように、第2のヒートシールローラ80の熱圧着凸部82の熱圧着面82aの幅を、第1のヒートシールローラ70の熱圧着凸部72の熱圧着面72aの幅よりも一定寸法だけ大きな幅に設定すると、このような不具合を確実に防止することができる。なお、第2のヒートシールローラ80の熱圧着凸部82の熱圧着面82aの幅方向両側では、一対の側面82bが、熱圧着面82aと所定角度で傾斜して(鈍角となるような傾斜角度で)延びている。このように、積層紙の製造装置では、熱圧着凸部72,82の熱圧着面72a,82aは、上側のヒートシールローラ70の熱圧着面72aよりも、下側のヒートシールローラ80の熱圧着面80を幅広とし、かつ、下側のヒートシールローラ80の熱圧着凸部92の幅方向両端縁部のコーナー部をカットして(切り欠いて)、テーパー状(面取り状)又はアール状(湾曲面取り状)等のカット形状とすることが好ましい。   Further, as shown in FIG. 13, the width of the thermocompression bonding surface 82a of the thermocompression bonding convex portion 82 of the second heat sealing roller 80 is equal to the width of the thermocompression bonding surface 72a of the thermocompression bonding convex portion 72 of the first heat sealing roller 70. The width is set to be larger than the width by a certain dimension, and the thermocompression-bonding surface 72a of the thermocompression-bonding convex portion 72 and the thermocompression-bonding surface 82a of the thermocompression-bonding convex portion 82 are opposed to each other (the thickness of the thermal fusion bonding portion 11 of the laminated paper 10). When they are arranged in a close contact state (with a gap of a minute), both sides in the width direction of the thermocompression-bonding surface 82a of the thermocompression-bonding convex portion 82 are respectively formed on both sides in the width-direction of the thermocompression-bonding surface 72a of the thermocompression-bonding convex portion 72. The part of a certain width is exposed. As a result, the crepe paper 1 of the laminated paper 10X before heat fusion is thermocompression-bonded and heat-bonded to the nonwoven fabric 2 between the thermocompression-bonding surface 72a of the thermocompression-bonding convex portion 72 and the thermocompression-bonding surface 82a of the thermocompression-bonding convex portion 82. At this time, both widthwise edges of the thermocompression bonding surface 72a of the thermocompression bonding convex portion 72 are arranged on the thermocompression bonding surface 82a of the thermocompression bonding convex portion 82. It is possible to greatly reduce the external force (in particular, the shearing force) applied to the laminated paper 10X before thermal fusion from both widthwise edges of 72a. That is, if the width of the thermocompression-bonding surface 72a of the thermocompression-bonding convex portion 72 and the width of the thermocompression-bonding surface 82a of the thermocompression-bonding convex portion 82 are the same, the thermocompression-bonding surface 72a When the crepe paper 1 of the laminated paper 10X before heat fusion is thermocompression-bonded and heat-sealed to the nonwoven fabric 2 between the thermocompression-bonding surface 82a of the pressure-bonding convex portion 82, the thermocompression-bonding surface 72a of the thermocompression-bonding convex portion 72 is formed. Both widthwise end edges are arranged at the same positions as the widthwise both ends of the thermocompression bonding surface 82a of the thermocompression-bonding convex portion 82, and the heat-melting from the widthwise both edges of the thermocompression-bonding surface 72a of the thermocompression-bonding convex portion 72 is performed. Since the external force (in particular, the shearing force) applied to the laminated paper 10X before attachment becomes large, there is a possibility that a part of the laminated paper 10X before heat fusion (in particular, the crepe paper 1) will be cut or damaged. However, as shown in FIG. 13, the width of the thermocompression bonding surface 82a of the thermocompression bonding convex portion 82 of the second heat sealing roller 80 is set to the width of the thermocompression bonding surface 72a of the thermocompression bonding convex portion 72 of the first heat sealing roller 70. If the width is set to be larger than the width by a certain dimension, such a problem can be surely prevented. In addition, on both sides in the width direction of the thermocompression bonding surface 82a of the thermocompression bonding convex portion 82 of the second heat seal roller 80, the pair of side surfaces 82b are inclined at a predetermined angle with respect to the thermocompression bonding surface 82a (oblique angle). Extending at an angle). As described above, in the laminated paper manufacturing apparatus, the thermocompression bonding surfaces 72a and 82a of the thermocompression-bonding convex portions 72 and 82 are lower than the thermocompression bonding surface 72a of the upper heat-sealing roller 70 in the heat-sealing roller 80. The crimping surface 80 is wide, and the corner portions of the widthwise both end edges of the thermocompression-bonding convex portion 92 of the lower heat-sealing roller 80 are cut (notched) to form a taper shape (chamfered shape) or a rounded shape. A cut shape such as (curved chamfer) is preferable.

[ローラ長及びローラ径]
ヒートシールローラ70,80のローラ長Lは、1200mm〜1500mmの範囲とすることが好ましい。ヒートシールローラ70,80のローラ径Dを1200mm未満の値とすると、生産性を低下する可能性がある。一方、ヒートシールローラ70,80のローラ長Lを1500mmを超える値とすると、後述するクラウン現象の問題が発生する可能性がある。また、ヒートシールローラ70,80のローラ径Dは、180mm〜300mmの範囲とすることが好ましい。ヒートシールローラ70,80のローラ径Dを180mm未満の値とすると、熱圧着凸部72,82による熱融着前積層紙10Xの熱融着部部分の圧着力が不足する可能性がある。一方、ヒートシールローラ70,80のローラ径Dを300mmを超える値とすると、コスト高の問題が発生する。
[Roller length and roller diameter]
The roller length L of the heat seal rollers 70 and 80 is preferably in the range of 1200 mm to 1500 mm. When the roller diameter D of the heat seal rollers 70 and 80 is set to a value less than 1200 mm, productivity may be reduced. On the other hand, if the roller length L of the heat-sealing rollers 70 and 80 is set to a value exceeding 1500 mm, the problem of the crown phenomenon described later may occur. The roller diameter D of the heat seal rollers 70 and 80 is preferably in the range of 180 mm to 300 mm. When the roller diameter D of the heat-sealing rollers 70 and 80 is set to a value less than 180 mm, the pressure-bonding force of the heat-bonding convex portions 72 and 82 at the heat-bonding portion of the laminated paper 10X before heat-bonding may be insufficient. On the other hand, if the roller diameter D of the heat seal rollers 70 and 80 is set to a value exceeding 300 mm, a problem of high cost will occur.

[ヒートシールローラのローラ径とローラ長と熱圧着時の押圧力との関係]
前記ヒートシールローラ70,80による熱融着前積層紙10Xの熱圧着動作では、ヒートシールローラ70,80のローラ径D及びローラ長Lにより、熱圧着凸部72,82から熱融着前積層紙10Xの熱融着部部分に加わる押圧力が変化するとの知見を本発明者は得ている。また、本発明者は、ヒートシールローラ70,80による熱融着前積層紙10Xの熱圧着動作では、熱圧着凸部72,82から熱融着前積層紙10Xの熱融着部部分に加える押圧力(以下、「熱圧着時押圧力」という。)は、熱融着部11,11bを確実に形成するためには、ヒートシールローラ70,80のローラ長Lを小さいものとした場合でも、少なくとも2〜3気圧以上の値とする必要があるとの知見を得ている。また、ヒートシールローラ70,80のローラ長Lが1400mmの場合、熱圧着時押圧力は、5.5〜7.0気圧の範囲内とすることが好ましい。即ち、ヒートシールローラ70,80のローラ長Lが1400mmの場合、ヒートシールローラ70,80による熱圧着時に、熱融着前積層紙10Xは、5気圧〜7気圧の圧力までは十分な耐久性を有するため、前記熱圧着時押圧力としてはこの範囲が最適である。熱圧着時押圧力を7気圧以上とすると、熱融着前積層紙10Xが破損する(例えば、熱圧着凸部72の熱圧着面72aの隅角部等に対応する一部で断裂する)可能性がある。
[Relationship between roller diameter and length of heat-sealing roller and pressing force during thermocompression bonding]
In the thermocompression bonding operation of the laminated paper 10X before heat fusion by the heat seal rollers 70 and 80, the pre-heat fusion lamination from the thermocompression protrusions 72 and 82 depending on the roller diameter D and the roller length L of the heat seal rollers 70 and 80. The present inventor has found that the pressing force applied to the heat-sealed portion of the paper 10X changes. In addition, the inventor adds the heat-sealing rollers 70 and 80 to the heat-sealing portion of the pre-heat-sealing laminated paper 10X in the thermo-compression bonding operation of the pre-heat-sealing laminated paper 10X. The pressing force (hereinafter, referred to as "pressing force during thermocompression bonding") is required to reliably form the heat-sealed portions 11 and 11b even when the roller length L of the heat seal rollers 70 and 80 is small. It has been found that the value needs to be at least 2-3 atmospheres or more. When the roller length L of the heat seal rollers 70 and 80 is 1400 mm, the pressing force during thermocompression bonding is preferably in the range of 5.5 to 7.0 atmospheric pressure. That is, when the roller length L of the heat seal rollers 70 and 80 is 1400 mm, the laminated paper 10X before heat fusion has sufficient durability up to a pressure of 5 to 7 atm during thermocompression bonding by the heat seal rollers 70 and 80. Therefore, this range is optimal as the pressing force during the thermocompression bonding. If the pressing force during thermocompression bonding is 7 atm or more, the laminated paper 10X before thermal fusion may be damaged (for example, a part corresponding to a corner of the thermocompression bonding surface 72a of the thermocompression convex portion 72 may be broken). There is a nature.

また、ヒートシールローラ70,80のローラ長Lが1400mmの場合に、熱圧着時押圧力を7気圧以上とすると、ヒートシールローラ70,80に、いわゆるクラウン現象(ヒートシールローラ70,80が径方向に湾曲してヒートシールローラ70,80間に隙間が生じる現象)が発生する可能性もある。このクラウン現象が発生した場合、ヒートシールローラ70,80が径方向に湾曲して、ヒートシールローラ70,80間に正面視で太鼓状の隙間が発生することになる。この場合にヒートシールローラ70,80間に発生する径方向の隙間間隔は微小間隔ではあるが、ヒートシールローラ70,80の長さ方向においては大きな範囲が湾曲して、その大きな範囲で微小間隔の隙間が発生することになる。したがって、このクラウン現象によるヒートシールローラ70,80間の隙間は、1mm以下の微小隙間ではあるが、積層紙原料シート(熱融着前積層紙10X)の厚みが1mm以下と薄いため、ヒートシールローラ70,80の熱圧着面72a,82aが熱融着前積層紙10Xから浮いた状態となり、それらの間に隙間が発生する可能性があり、この場合は、ヒートシールローラ70,80の熱圧着面72a,82aにより熱融着前積層紙10Xの熱融着部部分を圧着することができないことになる。   When the roller length L of the heat seal rollers 70 and 80 is 1400 mm and the pressing force during thermocompression bonding is 7 atm or more, the heat seal rollers 70 and 80 have a so-called crown phenomenon (the diameter of the heat seal rollers 70 and 80 is There is also a possibility that a phenomenon occurs in which the heat seal rollers 70 and 80 are curved in a direction and a gap is generated between the heat seal rollers 70 and 80. When this crown phenomenon occurs, the heat seal rollers 70 and 80 are curved in the radial direction, and a drum-shaped gap is formed between the heat seal rollers 70 and 80 in a front view. In this case, the radial gap between the heat seal rollers 70 and 80 is a minute gap, but a large range is curved in the length direction of the heat seal rollers 70 and 80, and a minute gap is generated in the large range. Gaps will occur. Therefore, although the gap between the heat-sealing rollers 70 and 80 due to the crown phenomenon is a minute gap of 1 mm or less, since the thickness of the laminated paper raw sheet (laminated paper 10X before heat fusion) is as thin as 1 mm or less, the heat-sealing is performed. The thermocompression bonding surfaces 72a and 82a of the rollers 70 and 80 may float from the laminated paper 10X before heat fusion, and a gap may occur between them. In this case, the heat of the heat seal rollers 70 and 80 is reduced. The pressure-bonding surfaces 72a and 82a make it impossible to pressure-bond the heat-bonding portion of the laminated paper 10X before heat-melting.

したがって、このようなクラウン現象の問題を回避するためには、ヒートシールローラ70,80のローラ長Lが1400mmの場合、上記のように、熱圧着時押圧力は、5.5〜7.0気圧の範囲内とすることが好ましい。ヒートシールローラ70,80のローラ長Lを1400mmとした場合において、熱圧着時押圧力を5.5気圧未満とすると、熱圧着凸部72,82により熱融着前積層紙10Xを熱融着部を安定して形成できない可能性がある(即ち、熱融着部の接着力が不足する可能性がある)。一方、ヒートシールローラ70,80のローラ長Lを1400mmとした場合において、熱圧着時押圧力を7気圧を超える値とすると、過度な圧力が熱融着前積層紙10Xの熱融着部に加わり、熱融着部が接着時に硬化する可能性がある。また、ヒートシールローラ70,80のローラ長Lを1200mmとした場合、熱圧着時押圧力は4.5気圧とすることも可能である。また、ヒートシールローラ70,80のローラ長Lを1500mmとした場合、熱圧着時押圧力は7.5〜8.0気圧の範囲とすることも可能である。ヒートシールローラ70,80のローラ長Lを1500mmとした場合において、熱圧着時押圧力を7.5気圧未満とすると、熱圧着凸部72,82により熱融着前積層紙10Xを熱融着部を安定して形成できない可能性がある(即ち、熱融着部の接着力が不足する可能性がある)。一方、ヒートシールローラ70,80のローラ長Lを1500mmとした場合において、熱圧着時押圧力を8気圧を超える値とすると、過度な圧力が熱融着前積層紙10Xの熱融着部に加わり、熱融着部が接着時に硬化する可能性がある。   Therefore, in order to avoid the problem of such a crown phenomenon, when the roller length L of the heat seal rollers 70 and 80 is 1400 mm, the pressing force during thermocompression bonding is 5.5 to 7.0 as described above. It is preferably within the range of atmospheric pressure. When the roller length L of the heat seal rollers 70 and 80 is 1400 mm and the pressing force during thermocompression bonding is less than 5.5 atm, the laminated paper sheet 10X before thermal fusion is thermally bonded by the thermocompression convex portions 72 and 82. The part may not be stably formed (that is, the adhesive strength of the heat-sealed part may be insufficient). On the other hand, when the roller length L of the heat seal rollers 70 and 80 is 1400 mm and the pressing force at the time of thermocompression bonding exceeds 7 atm, excessive pressure is applied to the heat fusion portion of the laminated paper 10X before heat fusion. In addition, the heat-sealed part may be hardened during bonding. When the roller length L of the heat seal rollers 70 and 80 is 1200 mm, the pressing force during thermocompression bonding can be 4.5 atmospheric pressure. Further, when the roller length L of the heat seal rollers 70 and 80 is 1500 mm, the pressing force at the time of thermocompression bonding can be in the range of 7.5 to 8.0 atmospheric pressure. When the roller length L of the heat seal rollers 70 and 80 is 1500 mm and the pressing force during thermocompression bonding is less than 7.5 atm, the laminated paper sheet 10X before thermal fusion is thermally bonded by the thermocompression convex portions 72 and 82. The part may not be stably formed (that is, the adhesive strength of the heat-sealed part may be insufficient). On the other hand, when the roller length L of the heat-sealing rollers 70 and 80 is 1500 mm and the pressing force during thermocompression bonding is a value exceeding 8 atm, excessive pressure is applied to the heat-sealing portion of the laminated paper 10X before heat-sealing. In addition, the heat-sealed part may be hardened during bonding.

[ヒートシールローラの温度制御]
積層紙の製造装置では、熱融着前積層紙10Xの熱融着部で外層シートとしてのクレープ紙と中間層シート(不織布や非透過性シート等)とを確実に熱融着するため、ヒートシールローラ70,80の熱圧着時の温度(以下、「熱圧着温度」という。)は、175〜200℃の範囲内に設定し、かつ、温度分布がヒートシールローラ70,80の長さ方向の全体にわたって一定となるよう、温度制御することが好ましい。ヒートシールローラ70,80の熱圧着温度が175℃以下では、熱融着前積層紙10Xの熱融着部でクレープ紙と不織布とを確実に熱融着により確実に接着させることができず、一方、熱圧着温度が200℃以上では、中間層シートの熱癒着性樹脂(PP(ポリプロピレン),PE(ポリエチレン)等)が硬化劣化したり、不織布等の中間層シート自体が硬化して、熱融着性の繊維材料(熱融着性の合成樹脂繊維)が融着機能を発揮しなくなる(即ち、これにより、クレープ紙の融着による接着が不可能となる)可能性がある。また、図15(a)に示すように、ヒートシールローラ70,80の熱圧着温度は、ヒートシールローラ70,80の回転速度(即ち、熱融着前積層紙10Xの供給速度、換言すれば、熱融着部の長さ方向での形成速度)に比例して増減するよう、積層紙の製造装置でヒートシールローラ70,80の温度制御及び回転制御を行うことが好ましい。
[Temperature control of heat seal roller]
In the laminated paper manufacturing apparatus, the crepe paper as the outer layer sheet and the intermediate layer sheet (nonwoven fabric, non-permeable sheet, etc.) are reliably heat-sealed at the heat-sealing portion of the pre-heat-sealing laminated paper 10X. The temperature of the seal rollers 70, 80 during thermocompression bonding (hereinafter referred to as "thermocompression temperature") is set within the range of 175 to 200°C, and the temperature distribution is in the longitudinal direction of the heat seal rollers 70, 80. It is preferable to control the temperature so that the temperature becomes constant over the entire temperature range. When the heat-sealing temperature of the heat-sealing rollers 70 and 80 is 175° C. or lower, the crepe paper and the nonwoven fabric cannot be surely adhered by heat-sealing at the heat-sealing portion of the laminated paper 10X before heat-sealing, On the other hand, when the thermocompression bonding temperature is 200° C. or higher, the heat-adhesive resin (PP (polypropylene), PE (polyethylene), etc.) of the intermediate layer sheet is cured and deteriorated, or the intermediate layer sheet such as the nonwoven fabric is cured, and There is a possibility that the fusible fiber material (heat-fusible synthetic resin fiber) will not exhibit the fusing function (that is, the crepe paper cannot be bonded by fusing). Further, as shown in FIG. 15A, the thermocompression bonding temperature of the heat seal rollers 70, 80 is the rotational speed of the heat seal rollers 70, 80 (that is, the supply speed of the laminated paper 10X before heat fusion, in other words, It is preferable to control the temperature and rotation of the heat-sealing rollers 70 and 80 in the laminated paper manufacturing apparatus so that the heat-sealing rollers 70 and 80 increase or decrease in proportion to the length of the heat-sealing portion.

[ヒートシールローラの回転制御]
積層紙の製造装置では、熱融着前積層紙10Xの熱融着部で外層シートとしてのクレープ紙と中間層シート(不織布や非透過性シート等)とを確実に熱融着するため、ヒートシールローラ70,80が、上記の設定範囲内の熱圧着温度に到達してから、ヒートシールローラ70,80を回転開始して、熱融着前積層紙10Xの熱融着部の形成を実行する。また、ヒートシールローラ70,80の熱圧着温度は上記設定範囲で一定となるよう制御するが、ヒートシールローラ70,80の回転速度は、積層紙原料シートの厚み(即ち、熱融着前積層紙10Xの厚み)に応じて増減変更して制御することが好ましい。即ち、図15(c)に示すように、ヒートシールローラ70,80の回転速度は、熱融着前積層紙10Xの厚み(原紙厚)に比例して増減するよう、積層紙の製造装置でヒートシールローラ70,80の回転制御を行うことが好ましい。この場合も、ヒートシールローラ70,80の熱圧着温度は一定に維持し、原紙厚に応じてヒートシールローラ70,80の回転速度(原紙の送給速度)を増減変更する。同様に、図15(d)に示すように、ヒートシールローラ70,80の回転速度は、熱融着前積層紙10Xの不織布原料シートの厚み(不織布厚)に比例して増減するよう、積層紙の製造装置でヒートシールローラ70,80の回転制御を行うこともできる。この場合も、ヒートシールローラ70,80の熱圧着温度は一定に維持し、不織布厚に応じてヒートシールローラ70,80の回転速度(原紙の送給速度)を増減変更する。更に、図15(b)に示すように、ヒートシールローラ70,80の熱圧着温度は、熱融着前積層紙10Xの不織布の厚み(不織布厚)に比例して増減するよう、積層紙の製造装置でヒートシールローラ70,80の温度制御を行うこともできる。この場合も、ヒートシールローラ70,80の回転速度は一定に維持し、不織布厚に応じてヒートシールローラ70,80の熱圧着温度を増減変更する。ここで、ヒートシールローラにより熱圧着速度(単位時間当たりの、熱融着前積層紙10Xに形成される熱融着部列の長さ)は、例えば、20m/分とすることが好ましい。
[Rotation control of heat seal roller]
In the laminated paper manufacturing apparatus, the crepe paper as the outer layer sheet and the intermediate layer sheet (nonwoven fabric, non-permeable sheet, etc.) are reliably heat-sealed at the heat-sealing portion of the pre-heat-sealing laminated paper 10X. After the seal rollers 70, 80 reach the thermocompression bonding temperature within the above-mentioned set range, the heat seal rollers 70, 80 are started to rotate to form the heat-sealed portion of the pre-heat-sealed laminated paper 10X. To do. Further, the thermocompression bonding temperature of the heat seal rollers 70 and 80 is controlled to be constant within the above-mentioned setting range, but the rotation speed of the heat seal rollers 70 and 80 depends on the thickness of the laminated paper raw material sheet (that is, pre-fusing lamination). It is preferable to increase/decrease and control according to (the thickness of the paper 10X). That is, as shown in FIG. 15C, the rotational speed of the heat seal rollers 70 and 80 is adjusted by the laminated paper manufacturing apparatus so as to increase or decrease in proportion to the thickness (base paper thickness) of the laminated paper 10X before heat fusion. It is preferable to control the rotation of the heat seal rollers 70 and 80. Also in this case, the thermocompression bonding temperature of the heat seal rollers 70 and 80 is kept constant, and the rotation speed (feed speed of the base paper) of the heat seal rollers 70 and 80 is increased or decreased according to the thickness of the base paper. Similarly, as shown in FIG. 15D, the rotation speeds of the heat-sealing rollers 70 and 80 are laminated so that the rotational speeds of the heat-sealing rollers 70 and 80 increase or decrease in proportion to the thickness (nonwoven fabric thickness) of the nonwoven fabric raw sheet of the laminated paper 10X before heat fusion. It is also possible to control the rotation of the heat seal rollers 70 and 80 with a paper manufacturing apparatus. Also in this case, the thermocompression bonding temperature of the heat seal rollers 70 and 80 is maintained constant, and the rotation speed (feeding speed of the base paper) of the heat seal rollers 70 and 80 is increased or decreased according to the thickness of the nonwoven fabric. Further, as shown in FIG. 15B, the thermocompression bonding temperature of the heat-sealing rollers 70 and 80 is adjusted so as to increase or decrease in proportion to the thickness of the nonwoven fabric (nonwoven fabric thickness) of the laminated paper 10X before heat fusion. The temperature of the heat seal rollers 70 and 80 can be controlled by the manufacturing apparatus. Also in this case, the rotation speeds of the heat seal rollers 70 and 80 are maintained constant, and the thermocompression bonding temperature of the heat seal rollers 70 and 80 is increased or decreased according to the thickness of the nonwoven fabric. Here, the thermocompression bonding speed (the length of the heat-sealing portion row formed on the pre-heat-sealing laminated paper 10X per unit time) by the heat-sealing roller is preferably, for example, 20 m/min.

[均一温度制御]
積層紙の製造装置は、上記のとおり、ヒートシールローラ70,80の熱圧着温度を、ヒートシールローラ70,80の全体にわたった均一な温度分布となるよう温度制御し、熱融着部での接着むらが発生しないようにしているが、この温度制御のための構成として、図12に示す構成を採用することができる。詳細には、ヒートシールローラ70,80は、それぞれ、図11に示すように、周壁と一対の側壁73,83により両端を閉塞した円筒状となっているが、これにより、図12に示すように、ヒートシールローラ70,80の内部には、それぞれ、密閉空間70S,80Sが形成されている。このヒートシールローラ70,80の内部空間70S、80Sは、真空状態に維持された密閉空間となっている。そして、積層紙の製造装置は、ヒートシールローラ70,80の内部空間70S、80Sに、それぞれ、外部の水供給手段を接続し、この水供給手段からヒートシールローラ70,80の内部空間70S、80Sに、それぞれ、水分を供給すると共に、ヒートシールローラ70,80の加熱時に、その水分を加熱して得た水蒸気を利用して、ヒートシールローラ70,80の温度を一定に維持するようになっている。例えば、積層紙の製造装置は、予め、ヒートシールローラ70,80の内部空間70S、80Sに所定量の水を貯留しておき、ヒートシールローラ70,80の加熱時に、その水分を加熱して得た水蒸気を利用して、ヒートシールローラ70,80の温度を一定に維持するようにしたり、或いは、ヒートシールローラ70,80の動作時に、内部空間70S,80Sに飽和水蒸気又は過熱水蒸気を供給して、その水蒸気を利用して、ヒートシールローラ70,80の温度を一定に維持するようになっている。この場合、高温水蒸気(例えば飽和水蒸気)をヒートシールローラ70,80の内面に薄い層状又は膜状となるように付着させ、その層状又は膜状の水蒸気により、ヒートシールローラ70,80の全体を均一な温度に維持するようになっている。そして、積層紙の製造装置は、ヒートシールローラ70,80による熱圧着動作開始までに、ヒートシールローラ70,80を所定の加熱手段により加熱して前記熱圧着温度まで温度上昇する。例えば、積層紙の製造装置は、ヒートシールローラ70,80の内部に誘導コイルを巻き回して配設し、誘導コイルに交流電流を出力してヒートシールローラ70,80に渦電流を誘導発生させることで、ヒートシールローラをジュール発熱により前記所定の熱圧着温度まで加熱して、その所定温度を一定に維持するよう制御する。そして、この誘導加熱手段による誘導加熱に加えて、前記水蒸気による温度一定化動作により、それぞれ、ヒートシールローラ70,80を、その周方向の全体及び長さ方向の全体にわたって、(特に、全ての熱圧着凸部72,82の熱圧着面72a,82aの全面にわたって)前記所定の熱圧着温度が均一かつ均等に維持されるように制御している。これにより、ヒートシールローラ70,80の熱圧着凸部72,83の熱圧着面72a,82aの温度分布が、全面で絶対的に同一(均一)に維持される。なお、ヒートシールローラ70,80の加熱手段(加熱ヒーター)は、上記のような電気式の構成(例えば、前記誘導加熱手段のような誘導加熱式の構成)とすることが好ましい。こうすると、加熱手段をオイルヒータ式とした場合のような油漏れの恐れを回避することができ、また、オイルヒータ式に比較して、加熱手段自体によってもヒートシールローラ70,80の温度分布の一定化に寄与することができる。
[Uniform temperature control]
As described above, the laminated paper manufacturing apparatus controls the thermo-compression bonding temperature of the heat-sealing rollers 70 and 80 so as to obtain a uniform temperature distribution over the entire heat-sealing rollers 70 and 80. Although the uneven adhesion is prevented from occurring, the configuration shown in FIG. 12 can be adopted as the configuration for this temperature control. Specifically, as shown in FIG. 11, the heat seal rollers 70 and 80 have a cylindrical shape whose both ends are closed by a peripheral wall and a pair of side walls 73 and 83, respectively. Further, inside the heat seal rollers 70 and 80, closed spaces 70S and 80S are formed, respectively. The internal spaces 70S and 80S of the heat seal rollers 70 and 80 are closed spaces maintained in a vacuum state. Then, the laminated paper manufacturing apparatus connects external water supply means to the internal spaces 70S and 80S of the heat seal rollers 70 and 80, respectively, and from this water supply means, the internal spaces 70S of the heat seal rollers 70 and 80, Moisture is supplied to 80S, respectively, and at the time of heating the heat seal rollers 70 and 80, the temperature of the heat seal rollers 70 and 80 is kept constant by utilizing the steam obtained by heating the water. Is becoming For example, the laminated paper manufacturing apparatus stores a predetermined amount of water in the internal spaces 70S and 80S of the heat seal rollers 70 and 80 in advance, and heats the moisture when the heat seal rollers 70 and 80 are heated. The obtained steam is used to keep the temperature of the heat seal rollers 70 and 80 constant, or when the heat seal rollers 70 and 80 are operating, saturated steam or superheated steam is supplied to the internal spaces 70S and 80S. Then, by utilizing the steam, the temperature of the heat seal rollers 70 and 80 is kept constant. In this case, high temperature steam (for example, saturated steam) is adhered to the inner surfaces of the heat seal rollers 70 and 80 so as to form a thin layer or film, and the layer or film steam is applied to the entire heat seal rollers 70 and 80. It is designed to maintain a uniform temperature. Then, the laminated paper manufacturing apparatus heats the heat-sealing rollers 70, 80 by a predetermined heating means and raises the temperature to the thermo-compression bonding temperature before the heat-bonding operation by the heat-sealing rollers 70, 80 is started. For example, in a laminated paper manufacturing apparatus, an induction coil is wound and disposed inside the heat seal rollers 70 and 80, and an alternating current is output to the induction coil to induce eddy currents in the heat seal rollers 70 and 80. As a result, the heat seal roller is heated to the predetermined thermocompression bonding temperature by Joule heat generation, and is controlled to maintain the predetermined temperature constant. Then, in addition to the induction heating by the induction heating means, the heat sealing rollers 70, 80 are respectively subjected to the temperature stabilizing operation by the water vapor over the entire circumferential direction and the entire longitudinal direction (in particular, all The predetermined thermocompression bonding temperature is controlled to be maintained uniformly and evenly (over the entire surface of the thermocompression bonding surfaces 72a, 82a of the thermocompression bonding convex portions 72, 82). As a result, the temperature distribution of the thermocompression bonding surfaces 72a, 82a of the thermocompression bonding protrusions 72, 83 of the heat seal rollers 70, 80 is maintained absolutely the same (uniform) over the entire surface. It is preferable that the heating means (heater) of the heat seal rollers 70, 80 has an electrical configuration as described above (for example, an induction heating type configuration like the induction heating means). By doing so, it is possible to avoid the risk of oil leakage such as in the case where the heating means is of the oil heater type, and the temperature distribution of the heat seal rollers 70 and 80 is also increased by the heating means itself, as compared with the oil heater type. Can contribute to the stabilization of.

また、積層紙の製造装置は、ヒートシールローラ70,80の熱圧着時押圧力を、特に、熱圧着凸部72の熱圧着面72aと熱圧着凸部82の熱圧着面82aとの間の対向面の全面にわたって一定となるよう制御している。このように、積層紙の製造装置は、ヒートシールローラ70,80の温度分布の制御と、圧力分布の制御とを同時に行うことが好ましく、こうすることで、積層紙10の熱融着部列11の各熱融着部11a,11bにおける接着むらを極力なくすことができる。   Further, in the laminated paper manufacturing apparatus, the pressing force at the time of thermocompression bonding of the heat seal rollers 70, 80 is particularly determined between the thermocompression bonding surface 72a of the thermocompression bonding convex portion 72 and the thermocompression bonding surface 82a of the thermocompression bonding convex portion 82. It is controlled to be constant over the entire opposing surface. As described above, it is preferable that the laminated paper manufacturing apparatus control the temperature distribution of the heat seal rollers 70 and 80 and the pressure distribution at the same time. It is possible to eliminate the unevenness of adhesion in the heat-sealed portions 11a and 11b of 11 as much as possible.

[積層紙の製造方法]
上記実施の形態1〜3の積層紙10の発明を含め、本発明の積層紙は、以下に説明する積層紙の製造方法により製造することが好ましい。なお、この積層紙の製造方法には、実施の形態5の積層紙の製造装置を好適に使用することができる。
[Manufacturing method of laminated paper]
The laminated paper of the present invention, including the invention of the laminated paper 10 of the first to third embodiments, is preferably manufactured by the method for manufacturing laminated paper described below. The laminated paper manufacturing apparatus according to the fifth embodiment can be preferably used for the laminated paper manufacturing method.

実施の形態6(積層紙の製造装置の別例)
実施の形態5の積層紙の製造装置では、積層紙10の熱融着部列11の形成のための手段(以下、「熱融着手段」という。)として、一対のヒートシールローラ70,80による熱圧着の構成を採用しているが、積層紙10の熱融着部列11の形成のための熱融着手段としては、この構成以外にも、高周波溶着や超音波溶着によりクレープ紙を不織布等の中間層シートに対して(中間層シートの熱融着成分の融着動作によって)接着する構成を採用することができる。これら高周波溶着や超音波溶着を利用した熱融着手段によれば、熱融着による接着温度の調整が容易で、素材の多様性があり、また、融点の低い熱可塑性樹脂フィルムのシートで安価な素材が利用できる可能性もある。例えば、図16に示す積層紙の製造装置は、熱融着手段に、高周波溶着手段としての高周波ミシンを設けている。この実施の形態6の積層紙の製造装置は、図9に示す実施の形態5の積層紙の製造装置の一対のヒートシールローラ70,80を、高周波ミシン100に置き換えた点を除き、基本的には、実施の形態5の積層紙の製造装置と同様の構成であり、一対のクレープ紙1の間に不織布2を介装した三層構造(3枚合わせの構造)の熱融着前積層紙10Xを、案内ローラ61,62により高周波ミシン100に案内して送給し、高周波ミシン100により、熱融着間積層紙10の所定位置で熱融着部列11を形成した後、その熱融着後積層紙10Yを案内ローラ63,64により案内して巻取ローラ55に巻き取るようになっている。
Embodiment 6 (another example of a laminated paper manufacturing apparatus)
In the laminated paper manufacturing apparatus according to the fifth embodiment, a pair of heat seal rollers 70 and 80 are used as a means for forming the heat fusion portion row 11 of the laminated paper 10 (hereinafter, referred to as “heat fusion means”). Although the structure of thermo-compression bonding is adopted, the crepe paper by high-frequency welding or ultrasonic welding is used as the heat-sealing means for forming the heat-sealing portion row 11 of the laminated paper 10 in addition to this structure. A configuration of adhering to the intermediate layer sheet such as a non-woven fabric (by the fusing operation of the heat fusion component of the intermediate layer sheet) can be adopted. According to the heat fusion means utilizing these high-frequency welding and ultrasonic welding, it is easy to adjust the adhesion temperature by heat fusion, there are various materials, and the thermoplastic resin film sheet with a low melting point is inexpensive. There is a possibility that various materials can be used. For example, in the laminated paper manufacturing apparatus shown in FIG. 16, a high-frequency sewing machine as high-frequency welding means is provided in the heat-sealing means. The laminated paper manufacturing apparatus according to the sixth embodiment is basically the same as the laminated paper manufacturing apparatus according to the fifth embodiment shown in FIG. 9 except that the pair of heat seal rollers 70 and 80 are replaced with a high-frequency sewing machine 100. In the laminated paper manufacturing apparatus of the fifth embodiment, a non-woven fabric 2 is interposed between a pair of crepe papers 1 having a three-layer structure (a structure of three laminated sheets) before heat fusion. The paper 10X is guided and fed to the high-frequency sewing machine 100 by the guide rollers 61 and 62, and the high-frequency sewing machine 100 forms the heat-sealing portion row 11 at a predetermined position of the heat-sealing laminated paper 10 and then heats it. After fusing, the laminated paper 10Y is guided by the guide rollers 63 and 64 and wound around the winding roller 55.

[高周波ミシン]
高周波ミシン100は、第1の溶着ローラ101と、第2の溶着ローラ102とを対向配置し、これら第1の溶着ローラ101と第2の溶着ローラ102との間に、熱融着前積層紙10Xを挟持して高周波溶着し、前記熱融着部列11を形成するようになっている。このとき、第1の溶着ローラ101と第2の溶着ローラ102に加える(熱溶着のための)高周波電流は、上記実施の形態5の積層紙の製造装置及び積層紙の製造方法で述べたように、原紙厚や不織布厚等の諸条件に応じて、一定の温度制御となるよう、各種制御を行うことが好ましい。
[High frequency sewing machine]
The high-frequency sewing machine 100 includes a first fusing roller 101 and a second fusing roller 102 which are arranged to face each other, and a pre-heat-fusing laminated paper is provided between the first fusing roller 101 and the second fusing roller 102. 10X is sandwiched and high-frequency welding is performed to form the heat-sealing portion row 11. At this time, the high-frequency current (for thermal welding) applied to the first fusing roller 101 and the second fusing roller 102 is the same as described in the laminated paper manufacturing apparatus and the laminated paper manufacturing method of the fifth embodiment. In addition, it is preferable to perform various controls so that the temperature is controlled to be constant according to various conditions such as the thickness of the base paper and the thickness of the nonwoven fabric.

[本発明の別の観点]
なお、本発明は、以下に記載する積層紙、積層紙の製造方法、又は積層紙の製造装置の発明として把握することもできる。
[Another aspect of the present invention]
The present invention can also be understood as an invention of a laminated paper, a laminated paper manufacturing method, or a laminated paper manufacturing apparatus described below.

まず、本発明の第1の観点に係る積層紙は、一対の外層シートとしてのクレープ紙と、前記クレープ紙の間に積層状態で配設される熱融着性の中間層シートとからなり、前記クレープ紙のクレープ皺の延びる方向と直交する方向に延びる線状の熱融着部列により、前記クレープ紙を前記中間層シートに熱融着して積層構造としている。また、本発明の積層紙は、前記中間層シート、又は、前記クレープ紙の内面に印刷部を設け、前記クレープ紙の厚みを、前記クレープ紙を湿潤状態としたときに前記印刷部が前記クレープ紙を介して外部から視認できるような厚みに設定している。   First, the laminated paper according to the first aspect of the present invention comprises a pair of outer layer sheets of crepe paper, and a heat-fusible intermediate layer sheet arranged in a laminated state between the crepe papers, The crepe paper is heat-sealed to the intermediate layer sheet by a linear heat-sealing portion row extending in a direction orthogonal to the direction in which the crepe wrinkles of the crepe paper extend to form a laminated structure. Further, the laminated paper of the present invention is provided with a printing portion on the inner surface of the intermediate layer sheet or the crepe paper, and the thickness of the crepe paper is the printing portion when the crepe paper is in a wet state. The thickness is set so that it can be seen from the outside through the paper.

本発明の第2の観点に係る積層紙の製造方法は、請求項1の積層紙の製造方法であって、前記中間層シートは不織布からなり、前記不織布の原料シートとなる不織布原料シートへの前記印刷部の印刷時の収縮を補償するため、その収縮率に応じて、実際に得るべき積層紙の幅よりも所定割合だけ大きな寸法の幅を有する不織布原料シートを使用する。   A method for producing a laminated paper according to a second aspect of the present invention is the method for producing a laminated paper according to claim 1, wherein the intermediate layer sheet is made of a non-woven fabric, and the intermediate material sheet is a raw material sheet for the non-woven fabric. In order to compensate the shrinkage at the time of printing of the printing section, a non-woven fabric raw material sheet having a width that is a predetermined proportion larger than the width of the laminated paper to be actually obtained is used according to the shrinkage ratio.

本発明の第3の観点に係る積層紙の製造装置は、第1の観点の積層紙の製造装置であって、前記熱融着部列を形成するための対をなす第1及び第2のヒートシールローラを備え、前記第1のヒートシールローラは、前記熱融着部に対応する凸条状の熱圧着凸部を有すると共に、前記熱圧着凸部の周面を熱圧着面とし、前記第2のヒートシールローラは、前記第1のヒートシールローラの熱圧着凸部と対向する凸条状の熱圧着凸部を有すると共に、前記熱圧着凸部の周面を前記第1のヒートシールローラの熱圧着面と対向する熱圧着面とし、前記第2のヒートシールローラの熱圧着凸部の熱圧着面の幅は、前記第1のヒートシールローラの熱圧着凸部の熱圧着面の幅よりも一定寸法だけ大きな幅に設定されている。   A laminated paper manufacturing apparatus according to a third aspect of the present invention is the laminated paper manufacturing apparatus according to the first aspect, in which a pair of first and second pair for forming the heat-fusion-bonding row is formed. A heat seal roller is provided, and the first heat seal roller has a ridge-shaped thermocompression-bonding convex portion corresponding to the heat-sealing portion, and a peripheral surface of the thermocompression-bonding convex portion is a thermocompression-bonding surface, and The second heat-sealing roller has a ridge-shaped thermocompression-bonding convex portion that faces the thermocompression-bonding convex portion of the first heat-sealing roller, and the peripheral surface of the thermocompression-bonding convex portion is the first heat-sealing member. The width of the thermocompression-bonding surface of the thermocompression-bonding convex portion of the second heat-sealing roller is the same as the width of the thermocompression-bonding surface of the first heat-sealing roller. The width is set to be a certain size larger than the width.

また、別の観点の本発明の積層紙は、一対の外層シートとしてのクレープ紙と、前記クレープ紙の間に積層状態で配設される熱融着性の中間層シートとからなり、前記クレープ紙のクレープ皺の延びる方向と直交する方向に延びる線状の熱融着部列により、前記クレープ紙を前記中間層シートに熱融着して積層構造とし、前記外層シートとしての一方のクレープ紙に対向する前記中間層シートの面に印刷部を設け、前記クレープ紙の厚みを、前記クレープ紙を湿潤状態としたときに前記中間層シートの面に設けた印刷部が前記クレープ紙を介して外部から視認できるような厚みに設定し、前記クレープ紙の乾燥状態においても前記中間層シートに設けた印刷部が前記クレープ紙を透過して外部から視認され、かつ、前記クレープ紙の含水時には前記前記中間層シートに設けた印刷部の前記クレープからの透過度が増大して、前記中間層シートに設けた印刷部の前記クレープ紙を介した外部からの視認性が増加するよう、前記クレープ紙のうち、少なくとも前記中間層シートにおいて前記印刷部が設けられる側のクレープ紙の厚みを設定したものである。なお、本発明の積層紙は、一対の外層シートとしてのクレープ紙と、前記クレープ紙の間に積層状態で配設される熱融着性の中間層シートとからなり、前記クレープ紙のクレープ皺の延びる方向と直交する方向に延びる線状の熱融着部列により、前記クレープ紙を前記中間層シートに熱融着して積層構造とし、かつ、前記中間層シート、又は、前記クレープ紙の内面に印刷部を設け、前記クレープ紙の厚みを、前記クレープ紙を湿潤状態としたときに前記印刷部が前記クレープ紙を介して外部から視認できるような厚みに設定したものとして構成することもできる。   In addition, another aspect of the laminated paper of the present invention comprises a pair of outer layer sheets of crepe paper, and a heat-fusible intermediate layer sheet arranged in a laminated state between the crepe papers. By a linear heat-sealing section row extending in a direction orthogonal to the direction in which the crepe wrinkles of the paper, the crepe paper is heat-sealed to the intermediate layer sheet to form a laminated structure, and one crepe paper as the outer layer sheet. The printing portion provided on the surface of the intermediate layer sheet facing the sheet, the thickness of the crepe paper, the printing portion provided on the surface of the intermediate layer sheet through the crepe paper when the crepe paper is in a wet state. The thickness of the crepe paper is set so that it can be seen from the outside, and even in the dry state of the crepe paper, the printing section provided on the intermediate layer sheet is seen from the outside through the crepe paper, and when the crepe paper contains water, The crepe paper is provided so that the transparency of the printing unit provided on the intermediate layer sheet from the crepe is increased and the visibility of the printing unit provided on the intermediate layer sheet from the outside through the crepe paper is increased. Among them, at least the thickness of the crepe paper on the side where the printing section is provided in the intermediate layer sheet is set. The laminated paper of the present invention comprises a pair of outer layer sheets of crepe paper, and a heat-fusible intermediate layer sheet arranged in a laminated state between the crepe papers, and the crepe wrinkles of the crepe paper. Of a linear heat-sealing portion row extending in a direction orthogonal to the extending direction, the crepe paper is heat-sealed to the intermediate layer sheet to form a laminated structure, and the intermediate layer sheet, or the crepe paper A printing unit may be provided on the inner surface, and the thickness of the crepe paper may be set so that the printing unit can be visually recognized from the outside through the crepe paper when the crepe paper is in a wet state. it can.

また、別の観点の本発明の積層紙の製造方法は、上記別の観点の積層紙の製造方法であって、前記中間層シートは不織布からなり、前記不織布として、外側の鞘がポリエチレンで内側の芯がポリエチレンテレフタレートとなっている芯鞘構造複合繊維をエアスルー法により接着剤を使用することなく繊維間結合して製造した非吸水性のエアスルー系不織布を使用し、前記印刷部は、印刷方法としてフレキソ印刷技術を使用し、印刷用インキとして水性インキ又は紫外線硬化型インキを使用して形成し、前記不織布の原料シートとなる不織布原料シートへの前記印刷部の印刷時の収縮を補償するため、その収縮率に応じて、実際に得るべき積層紙の幅よりも所定割合だけ大きな寸法の幅を有する不織布原料シートを使用して前記不織布への前記印刷部の印刷を行う。なお、本発明の積層紙の製造方法は、前記中間層シートは不織布からなり、前記不織布の原料シートとなる不織布原料シートへの前記印刷部の印刷時の収縮を補償するため、その収縮率に応じて、実際に得るべき積層紙の幅よりも所定割合だけ大きな寸法の幅を有する不織布原料シートを使用するものとして構成することもできる。   Further, a method for producing a laminated paper according to another aspect of the present invention is a method for producing a laminated paper according to another aspect, wherein the intermediate layer sheet is made of a non-woven fabric, and the outer sheath is polyethylene with an inner sheath as the inner side. The non-water-absorbent air-through non-woven fabric produced by inter-fiber bonding the core-sheath structure composite fibers whose core is polyethylene terephthalate without using an adhesive by the air-through method, and the printing section is a printing method. To compensate for shrinkage during printing of the printing part on the non-woven fabric raw material sheet, which is a raw material sheet of the non-woven fabric, formed by using flexographic printing technology as the ink for printing and using water-based ink or UV-curable ink The printing of the printing portion is performed on the nonwoven fabric by using a nonwoven fabric raw material sheet having a width that is larger than the width of the laminated paper to be actually obtained by a predetermined ratio according to the shrinkage ratio. In the method for producing a laminated paper of the present invention, the intermediate layer sheet is made of a non-woven fabric, and in order to compensate for the shrinkage at the time of printing of the printing section on the non-woven fabric raw material sheet which is the raw material sheet of the non-woven fabric, Accordingly, the non-woven fabric raw material sheet having a width larger than the width of the laminated paper to be actually obtained by a predetermined ratio can be used.

本発明の別の観点に係る積層紙の製造装置は、上記別の観点の積層紙の製造装置であって、前記熱融着部列を形成するための対をなす第1及び第2のヒートシールローラを備え、前記第1のヒートシールローラは、前記熱融着部に対応する凸条状の熱圧着凸部を有すると共に、前記熱圧着凸部の周面を熱圧着面とし、前記第2のヒートシールローラは、前記第1のヒートシールローラの熱圧着凸部と対向する凸条状の熱圧着凸部を有すると共に、前記熱圧着凸部の周面を前記第1のヒートシールローラの熱圧着面と対向する熱圧着面とし、前記第2のヒートシールローラの熱圧着凸部の熱圧着面の幅は、前記第1のヒートシールローラの熱圧着凸部の熱圧着面の幅よりも一定寸法だけ大きな幅に設定されている。   A laminated paper manufacturing apparatus according to another aspect of the present invention is the laminated paper manufacturing apparatus according to another aspect of the present invention, wherein a pair of first and second heats for forming the thermal fusion bonding row is provided. A first heat seal roller, wherein the first heat seal roller has a ridge-shaped thermocompression-bonding convex portion corresponding to the heat-sealing portion, and the peripheral surface of the thermocompression-bonding convex portion is a thermocompression-bonding surface; The second heat-sealing roller has a ridge-shaped thermocompression-bonding convex portion facing the thermocompression-bonding convex portion of the first heat-sealing roller, and has a peripheral surface of the thermocompression-bonding convex portion on the first heat-sealing roller. The width of the thermocompression bonding surface of the thermocompression bonding convex portion of the second heat seal roller is the width of the thermocompression bonding surface of the first heat sealing roller. The width is set to be larger by a certain dimension than that.

或いは、本発明は、以下に記載する積層紙、積層紙の製造方法、又は積層紙の製造装置の発明として把握することもできる。   Alternatively, the present invention can be understood as an invention of a laminated paper, a laminated paper manufacturing method, or a laminated paper manufacturing apparatus described below.

まず、本発明は、一対の外層シートとしてのクレープ紙と、前記クレープ紙の間に積層状態で配設される熱融着性の中間層シートとからなり、前記クレープ紙のクレープ皺の延びる方向と直交する方向に延びる線状の熱融着部列により、前記クレープ紙を前記中間層シートに熱融着して積層構造とし、前記中間層シート、又は、前記クレープ紙の内面に印刷部を設け、前記クレープ紙の厚みを、前記クレープ紙を湿潤状態としたときに前記印刷部が前記クレープ紙を介して外部から視認できるような厚みに設定したことを特徴とする積層紙として把握することもできる。   First, the present invention comprises a pair of outer layer sheets of crepe paper, and a heat-fusible intermediate layer sheet arranged in a laminated state between the crepe papers, and the direction in which the crepe wrinkles of the crepe paper extend. With a linear heat-sealing portion array extending in a direction orthogonal to the above, the crepe paper is heat-sealed to the intermediate layer sheet to form a laminated structure, and the intermediate layer sheet, or a printing portion on the inner surface of the crepe paper. To provide a laminated paper characterized in that the thickness of the crepe paper is set so that the printing unit can be visually recognized from the outside through the crepe paper when the crepe paper is in a wet state. You can also

また、上記発明は、更に、前記中間層シートが、前記印刷部を印刷可能な材質で、かつ、前記外層シートとしてのクレープ紙を前記熱融着部列で熱融着して接着可能な材質の不織布からなり、前記印刷部は、前記外層シートとしての一方のクレープ紙に対向する前記不織布の面に設けられることを特徴とする積層紙として把握することもできる。   Further, in the above invention, the intermediate layer sheet is made of a material capable of printing the printed portion, and a material capable of being heat-fused and bonded to the outer layer sheet of crepe paper in the heat-fusing part row. It can also be understood as a laminated paper characterized in that the printed portion is formed on the surface of the non-woven fabric facing the one crepe paper as the outer layer sheet.

また、上記発明は、更に、前記印刷部が、前記外層シートとしての一方のクレープ紙の内面に設けられることを特徴とする積層紙として把握することもできる。   Further, the above invention can be further understood as a laminated paper characterized in that the printing portion is provided on the inner surface of one crepe paper as the outer layer sheet.

また、上記発明は、前記中間層シートが、水分及び/又は油分の透過を遮断する合成樹脂製の非透過性シートからなり、前記印刷部は、前記中間層シートとしての非透過性シートに設けられることを特徴とする積層紙として把握することもできる。   Further, in the above invention, the intermediate layer sheet is made of a non-permeable sheet made of a synthetic resin that blocks the permeation of moisture and/or oil, and the printed portion is provided on the non-permeable sheet as the intermediate layer sheet. It can also be understood as a laminated paper characterized by being processed.

また、上記発明は、前記不織布が、坪量で、15〜25g/mの範囲内の厚みを有することを特徴とする積層紙として把握することもできる。 The above invention can also be understood as a laminated paper characterized in that the nonwoven fabric has a thickness in the range of 15 to 25 g/m 2 in basis weight.

また、上記発明は、前記クレープ紙が、20〜50g/mの範囲内の厚みを有することを特徴とする積層紙として把握することもできる。 Further, the above invention can be understood as a laminated paper characterized in that the crepe paper has a thickness within a range of 20 to 50 g/m 2 .

また、上記発明は、隣接する前記熱融着部列の幅方向中心線の間の間隔である幅方向の熱融着部間隔を、前記クレープ紙のクレープ率の範囲に応じた所定範囲内の任意の値に設定し、前記クレープ紙のクレープ率が20%〜26%の範囲内の場合、前記幅方向の熱融着部間隔は、10mm〜15mmの範囲内に設定し、前記クレープ紙のクレープ率が26%〜30%の範囲内の場合、前記幅方向の熱融着部間隔は、15〜25mmの範囲内に設定したことを特徴とする積層紙として把握することもできる。   Further, the above invention, the width of the heat-sealing portion interval is a distance between the widthwise centerlines of the adjacent heat-sealing portion row, within a predetermined range according to the range of the crepe ratio of the crepe paper. When the crepe ratio of the crepe paper is set to an arbitrary value, and the crepe ratio of the crepe paper is in the range of 20% to 26%, the width of the heat-sealing portion is set in the range of 10 mm to 15 mm. When the crepe ratio is in the range of 26% to 30%, it can be understood as a laminated paper characterized in that the space between the heat-sealing portions is set in the range of 15 to 25 mm.

また、本発明は、上記発明の積層紙の製造方法であって、前記中間層シートは不織布からなり、前記不織布の原料シートとなる不織布原料シートへの前記印刷部の印刷時の収縮を補償するため、その収縮率に応じて、実際に得るべき積層紙の幅よりも所定割合だけ大きな寸法の幅を有する不織布原料シートを使用することを特徴とする積層紙の製造方法として把握することもできる。   Further, the present invention is the method for producing a laminated paper according to the above invention, wherein the intermediate layer sheet is made of a non-woven fabric, and the shrinkage at the time of printing of the non-woven fabric raw material sheet, which is the raw material sheet of the non-woven fabric, is compensated for. Therefore, it can be understood as a method for producing a laminated paper, which is characterized by using a non-woven fabric raw material sheet having a width larger by a predetermined ratio than the width of the laminated paper to be actually obtained according to the shrinkage ratio. ..

また、本発明は、上記発明の積層紙の製造装置であって、前記熱融着部列を形成するための対をなす第1及び第2のヒートシールローラを備え、前記第1のヒートシールローラは、前記熱融着部に対応する凸条状の熱圧着凸部を有すると共に、前記熱圧着凸部の周面を熱圧着面とし、前記第2のヒートシールローラは、前記第1のヒートシールローラの熱圧着凸部と対向する凸条状の熱圧着凸部を有すると共に、前記熱圧着凸部の周面を前記第1のヒートシールローラの熱圧着面と対向する熱圧着面とし、前記第2のヒートシールローラの熱圧着凸部の熱圧着面の幅は、前記第1のヒートシールローラの熱圧着凸部の熱圧着面の幅よりも一定寸法だけ大きな幅に設定されていることを特徴とする積層紙の製造装置として把握することもできる。   Further, the present invention is the laminated paper manufacturing apparatus of the above invention, comprising a pair of first and second heat seal rollers for forming the heat-sealing section row, and the first heat seal. The roller has a ridge-shaped thermocompression-bonding convex portion corresponding to the heat-sealing portion, and the peripheral surface of the thermocompression-bonding convex portion is a thermocompression-bonding surface, and the second heat-sealing roller is the first heat-sealing roller. The heat-sealing roller has a thermocompression-projecting portion in the form of a ridge that faces the thermocompression-bonding convex portion, and the peripheral surface of the thermocompression-bonding convex portion is a thermocompression-bonding surface that faces the thermocompression-bonding surface of the first heat-sealing roller. The width of the thermocompression bonding surface of the thermocompression bonding convex portion of the second heat sealing roller is set to be larger than the width of the thermocompression bonding surface of the thermocompression bonding convex portion of the first heat sealing roller by a certain dimension. It can also be understood as an apparatus for producing laminated paper, which is characterized in that

本発明の積層紙は、積層紙の製造方法、及び積層紙の製造装置は、紙おしぼり製品の用途に好適に適用することができ、紙おしぼり製品の場合、2つ折り、3つ折り、4つ折り、観音折等の紙おしぼり製品に適用することができるが、これ以外にも、ロール状の原紙をそのまま製品化して、自動紙おしぼり製造機の原紙の用途に使用することもでき、また、紙おしぼり製品以外にも、介護や看護等の目的で使用される衛生用品等に応用することもできる。   The laminated paper of the present invention, the laminated paper manufacturing method, and the laminated paper manufacturing apparatus can be suitably applied to the application of a paper hand towel product. In the case of a paper hand towel product, two-fold, three-fold, four-fold, It can be applied to paper towel products such as Kannon folding, but in addition to this, it is also possible to commercialize a roll-shaped base paper as it is and use it as the base paper for an automatic paper towel making machine. Besides the product, it can also be applied to hygiene products used for the purpose of nursing care and nursing.

1:クレープ紙、2:不織布(熱融着性シート)
10,40,50,60,70,80:積層紙
11,12,41,42,51,61,82:熱融着部
11a,12a,41a,42a,51a,61a,82a:長点
11b,12b,41b,42b,51b,61b,82b:非融着部
30:第2のヒートシールローラ(ヒートシールローラ)
31:第1のヒートシール部(ヒートシール部)
32:第2のヒートシール部(ヒートシール部)
31a,32a:押圧突起、31b,32b:非押圧部
1: Crepe paper, 2: Non-woven fabric (heat-fusible sheet)
10, 40, 50, 60, 70, 80: Laminated paper 11, 12, 41, 42, 51, 61, 82: Thermal fusion bonding parts 11a, 12a, 41a, 42a, 51a, 61a, 82a: Long point 11b, 12b, 41b, 42b, 51b, 61b, 82b: non-fusing part 30: second heat seal roller (heat seal roller)
31: First heat seal part (heat seal part)
32: Second heat seal part (heat seal part)
31a, 32a: pressing protrusion, 31b, 32b: non-pressing portion

Claims (19)

一対の外層シートとしてのクレープ紙と、
前記一対のクレープ紙の間に積層状態で配設される熱融着性の中間層シートとしての不織布とからなり、
前記クレープ紙のクレープ皺の延びる方向と直交する方向に延びる線状の熱融着部列により、前記クレープ紙を前記中間層シートに熱融着して積層構造とし、
前記クレープ紙のクレープ率は、20%〜30%の範囲内に設定すると共に、前記熱融着部列の幅方向の熱融着部間隔は、10mm〜25mmの範囲内に設定し、
前記幅方向の熱融着部間隔の範囲内で、前記クレープ紙のクレープ率の増加に比例して前記幅方向の熱融着部間隔を増加することを特徴とする積層紙。
Crepe paper as a pair of outer layer sheets,
Consisting of a nonwoven fabric as a heat-fusible intermediate layer sheet arranged in a laminated state between the pair of crepe papers,
By a linear heat-sealing portion row extending in a direction orthogonal to the direction in which the crepe wrinkles of the crepe paper extend, the crepe paper is heat-sealed to the intermediate layer sheet to form a laminated structure,
The crepe ratio of the crepe paper is set within the range of 20% to 30%, and the width of the heat-sealing part rows in the width direction is set within the range of 10 mm to 25 mm.
A laminated paper, wherein the width of the heat-sealing portion is increased in proportion to the increase of the crepe ratio of the crepe paper within the range of the width of the heat-sealing portion.
一対の外層シートとしてのクレープ紙と、
前記一対のクレープ紙の間に積層状態で配設される熱融着性の中間層シートとしての不織布とからなり、
前記クレープ紙のクレープ皺の延びる方向と直交する方向に延びる線状の熱融着部列により、前記クレープ紙を前記中間層シートに熱融着して積層構造とし、
前記クレープ紙のクレープ率が20%〜26%の範囲内の場合、前記熱融着部列の幅方向の熱融着部間隔は、10mm〜15mmの範囲内に設定し、
前記クレープ紙のクレープ率が26%〜30%の範囲内の場合、前記熱融着部列の幅方向の熱融着部間隔は、15〜25mmの範囲内に設定し、
前記幅方向の熱融着部間隔の範囲内で、前記クレープ紙のクレープ率の増加に比例して前記幅方向の熱融着部間隔を増加することを特徴とする積層紙。
Crepe paper as a pair of outer layer sheets,
Consisting of a nonwoven fabric as a heat-fusible intermediate layer sheet arranged in a laminated state between the pair of crepe papers,
By a linear heat-sealing portion row extending in a direction orthogonal to the direction in which the crepe wrinkles of the crepe paper extend, the crepe paper is heat-sealed to the intermediate layer sheet to form a laminated structure,
When the crepe ratio of the crepe paper is in the range of 20% to 26%, the width of the heat-sealing portion rows in the width direction is set to 10 mm to 15 mm.
When the crepe ratio of the crepe paper is in the range of 26% to 30%, the width of the heat-sealing portion in the width direction of the heat-sealing portion is set within the range of 15 to 25 mm,
A laminated paper, wherein the width of the heat-sealing portion is increased in proportion to the increase of the crepe ratio of the crepe paper within the range of the width of the heat-sealing portion.
前記熱融着部列は、一定長さで一定幅の直線線分状の第1の熱融着部を長さ方向に一定間隔で破線状に配置すると共に、前記第1の熱融着部と同一の一定長さで一定幅の直線線分状の第2の熱融着部を、前記第1の熱融着部に対して、各第2の熱融着部の中間位置が第1の熱融着部間の間隔の中間位置と合致するような位置にくるよう位置をずらして配置することで構成され、
前記各熱融着部の長さは、35mm〜45mmの範囲内に設定され、
前記各熱融着部の幅は、1.5mm〜2.5mmの範囲内に設定され、
前記各熱融着部の長さと幅の比であるアスペクト比は、13:1〜23:1の範囲内に設定されていることを特徴とする請求項1又は2記載の積層紙。
In the heat-fusion-bonding section array, linear heat-segment-shaped first heat-fusion-bonding portions having a constant length and a constant width are arranged in a broken line shape at regular intervals in the lengthwise direction, and the first heat-bonding portions are arranged. A second linear heat-sealable portion having a constant length and a constant width, which is the same as the first thermal-sealable portion, and an intermediate position of each second thermal-sealable portion is first with respect to the first thermal-sealable portion It is configured by arranging the positions so as to come to a position that coincides with the intermediate position of the space between the heat-sealing parts,
The length of each heat fusion portion is set within the range of 35 mm to 45 mm,
The width of each heat-sealed portion is set within the range of 1.5 mm to 2.5 mm,
The laminated paper according to claim 1 or 2, wherein an aspect ratio, which is a ratio between the length and the width of each heat-sealed portion, is set within a range of 13:1 to 23:1.
前記各熱融着部列において、長さ方向に隣接する前記熱融着部間の間隔である熱融着部間隔は、18mm〜22mmの範囲内に設定され、
前記各熱融着部の長さと前記熱融着部間隔の比は、2:1に設定されていることを特徴とする請求項3記載の積層紙。
In each of the heat-sealing portion rows, the heat-sealing portion distance, which is the distance between the heat-sealing portions that are adjacent to each other in the lengthwise direction, is set within a range of 18 mm to 22 mm,
The laminated paper according to claim 3, wherein the ratio of the length of each heat-sealed portion to the space between the heat-sealed portions is set to 2:1.
前記熱融着部列は、一定長さで一定幅の直線線分状の第1の熱融着部を長さ方向に一定間隔で破線状に配置すると共に、前記第1の熱融着部と同一の一定長さで一定幅の直線線分状の第2の熱融着部を、前記第1の熱融着部に対して、各第2の熱融着部の中間位置が第1の熱融着部間の間隔の中間位置と合致するような位置にくるよう位置をずらして配置することで構成され、
前記熱融着部列の各熱融着部は、その長さ方向両端部を平面半円状の湾曲形状としていることを特徴とする請求項1又は2記載の積層紙。
In the heat-fusion-bonding section array, linear heat-segment-shaped first heat-fusion-bonding portions having a constant length and a constant width are arranged in a broken line shape at regular intervals in the lengthwise direction, and the first heat-bonding portions are arranged. A second linear heat-sealable portion having a constant length and a constant width, which is the same as that of It is configured by arranging the positions so as to come to a position that coincides with the intermediate position of the space between the heat-sealing parts,
The laminated paper according to claim 1 or 2, wherein each of the heat-sealing portions of the row of heat-sealing portions has a longitudinal semi-circular curved shape at both ends in the length direction.
前記クレープ紙の厚みは、坪量で、20〜50g/mの範囲内に設定され、
前記不織布の厚みは、坪量で、15〜25g/mの範囲内に設定されていることを特徴とする請求項1から5のいずれか1項記載の積層紙。
The thickness of the crepe paper is set in the range of 20 to 50 g/m 2 in basis weight,
The laminated paper according to any one of claims 1 to 5, wherein the thickness of the non-woven fabric is set in a range of 15 to 25 g/m 2 in basis weight.
前記不織布は、外側の鞘がポリエチレンで内側の芯がポリエチレンテレフタレートとなっている芯鞘構造複合繊維をエアスルー法により接着剤を使用することなく繊維間結合して製造した非吸水性のエアスルー系不織布であることを特徴とする請求項1から6のいずれか1項記載の積層紙。   The non-woven fabric is a non-water-absorbent air-through type non-woven fabric produced by inter-fiber bonding of core-sheath structure composite fibers in which the outer sheath is polyethylene and the inner core is polyethylene terephthalate without using an adhesive by an air-through method. The laminated paper according to any one of claims 1 to 6, wherein: 前記不織布は、坪量で、20g/mの厚みを有し、
前記各クレープ紙は、坪量で、35g/mの厚みを有し、
全体の厚みは、坪量で、90g/mとされていることを特徴とする請求項1から7のいずれか1項記載の積層紙。
The non-woven fabric has a thickness of 20 g/m 2 in basis weight,
Each of the crepe papers has a basis weight of 35 g/m 2 and a thickness of 35 g/m 2 .
The laminated paper according to claim 1, wherein the total thickness is 90 g/m 2 in terms of basis weight.
前記不織布は、坪量で、20g/mの厚みを有し、
前記各クレープ紙は、坪量で、20〜35mの範囲内の厚みを有することを特徴とする請求項1から請求項7のいずれか1項記載の積層紙。
The non-woven fabric has a thickness of 20 g/m 2 in basis weight,
The laminated paper according to any one of claims 1 to 7, wherein each of the crepe papers has a thickness in a range of 20 to 35 m 2 in basis weight.
請求項3又は5記載の積層紙の製造装置であって、
前記熱融着部列を形成するための対をなす第1及び第2のヒートシールローラを備え、
前記第1のヒートシールローラは、前記熱融着部に対応する凸条状の熱圧着凸部を有すると共に、前記熱圧着凸部の周面を熱圧着面とし、
前記第2のヒートシールローラは、前記第1のヒートシールローラの熱圧着凸部と対向する凸条状の熱圧着凸部を有すると共に、前記熱圧着凸部の周面を前記第1のヒートシールローラの熱圧着面と対向する熱圧着面とし、
前記第2のヒートシールローラの熱圧着凸部の熱圧着面の幅は、前記第1のヒートシールローラの熱圧着凸部の熱圧着面の幅よりも一定寸法だけ大きな幅に設定され、前記第1のヒートシールローラの熱圧着凸部の熱圧着面と前記第2のヒートシールローラの熱圧着凸部の熱圧着面とを対向して略密接状態で配置したときに、前記第1のヒートシールローラの熱圧着凸部の熱圧着面の幅方向両側で、それぞれ、前記第2のヒートシールローラの熱圧着凸部の熱圧着面の幅方向両端部の一定幅部分が露出するようになっていることを特徴とする積層紙の製造装置。
A laminated paper manufacturing apparatus according to claim 3 or 5, wherein
A pair of first and second heat-sealing rollers for forming the heat-sealing portion row,
The first heat-sealing roller has a ridge-shaped thermocompression-bonding convex portion corresponding to the heat-sealing portion, and a peripheral surface of the thermocompression-bonding convex portion is a thermocompression-bonding surface,
The second heat-sealing roller has a ridge-shaped thermocompression-bonding convex portion that faces the thermocompression-bonding convex portion of the first heat-sealing roller, and the peripheral surface of the thermocompression-bonding convex portion is the first heat-bonding portion. With the thermocompression bonding surface facing the thermocompression bonding surface of the seal roller,
The width of the thermocompression bonding surface of the thermocompression bonding convex portion of the second heat sealing roller is set to a width larger than the width of the thermocompression bonding surface of the thermocompression bonding convex portion of the first heat sealing roller by a certain dimension, and When the thermocompression-bonding surface of the thermocompression-bonding convex portion of the first heat-sealing roller and the thermocompression-bonding surface of the thermocompression-bonding convex portion of the second heat-sealing roller are arranged to face each other in a substantially close contact state, On both sides in the width direction of the thermocompression bonding surface of the thermocompression-bonding convex portion of the heat-sealing roller, fixed width portions of both ends in the width direction of the thermocompression-bonding surface of the thermocompression-bonding convex portion of the second heat-sealing roller are exposed. A laminated paper manufacturing device characterized by
前記第2のヒートシールローラの熱圧着凸部の熱圧着面の幅方向両側では、一対の側面が、前記熱圧着面と鈍角となるような所定の傾斜角度で傾斜して延びていることを特徴とする請求項10記載の積層紙の製造装置。   On both sides in the width direction of the thermocompression bonding surface of the thermocompression bonding convex portion of the second heat seal roller, a pair of side surfaces extends obliquely at a predetermined inclination angle with respect to the thermocompression bonding surface. 11. The laminated paper manufacturing apparatus according to claim 10. 前記熱圧着凸部の熱圧着面は、前記熱融着部に対応して、平面視で直線的に延びる直線細帯部と、前記直線細帯部の長さ方向両端の半円状の湾曲部とから構成されることを特徴とする請求項10又は11記載の積層紙の製造装置。 The thermocompression-bonding surface of the thermocompression- bonding convex portion corresponds to the heat-sealing portion, and has a linear thin strip portion that linearly extends in a plan view, and a semicircular curve at both ends in the length direction of the linear thin strip portion. The laminated paper manufacturing apparatus according to claim 10 or 11, wherein the laminated paper manufacturing apparatus comprises: 請求項10から12のいずれか1項記載の積層紙の製造装置を使用した積層紙の製造方法であって、
前記第1及び第2のヒートシールローラのローラ長は、1200mm〜1500mmの範囲内に設定され、
前記ヒートシールローラのローラ径Dは、180mm〜300mmの範囲内に設定され、
前記熱圧着凸部から熱融着前積層紙の熱融着部部分に加える押圧力である熱圧着時押圧力は、2気圧以上の値に設定されていることを特徴とする積層紙の製造方法。
A laminated paper manufacturing method using the laminated paper manufacturing apparatus according to claim 10.
The roller lengths of the first and second heat seal rollers are set within a range of 1200 mm to 1500 mm,
The roller diameter D of the heat seal roller is set in the range of 180 mm to 300 mm,
Manufacturing of laminated paper, characterized in that the pressing force during thermocompression bonding, which is the pressing force applied from the thermocompression-bonding convex portion to the heat-sealing portion of the laminated paper before heat-sealing, is set to a value of 2 atm or more. Method.
前記熱圧着時押圧力は、前記ヒートシールローラのローラ長Lが1400mmの場合、5.5〜7.0気圧の範囲内に設定され、前記ヒートシールローラのローラ長Lを1500mmの場合、7.5〜8.0気圧の範囲内に設定されることを特徴とする請求項13記載の積層紙の製造方法。   The pressing force during thermocompression bonding is set within a range of 5.5 to 7.0 atm when the roller length L of the heat seal roller is 1400 mm, and 7 when the roller length L of the heat seal roller is 1500 mm. The method for producing a laminated paper according to claim 13, wherein the pressure is set within a range of 0.5 to 8.0 atm. 前記ヒートシールローラの熱圧着時の温度である熱圧着温度は、175〜200℃の範囲内に設定され、
前記熱圧着温度が前記ヒートシールローラの回転速度に比例して増減するよう、前記ヒートシールローラの温度制御及び回転制御を行うことを特徴とする請求項13又は14記載の積層紙の製造方法。
The thermocompression bonding temperature, which is the temperature at the time of thermocompression bonding of the heat seal roller, is set in the range of 175 to 200° C.,
The method for producing a laminated paper according to claim 13 or 14, wherein temperature control and rotation control of the heat seal roller are performed so that the thermocompression bonding temperature increases and decreases in proportion to the rotation speed of the heat seal roller.
前記ヒートシールローラの熱圧着温度を一定に維持すると共に、前記ヒートシールローラの回転速度が熱融着前積層紙の厚みである原紙厚に比例して増減するよう、前記原紙厚に応じて前記ヒートシールローラの回転速度を増減変更して回転制御することを特徴とする請求項13又は14記載の積層紙の製造方法。   While keeping the thermocompression bonding temperature of the heat seal roller constant, the rotation speed of the heat seal roller increases or decreases in proportion to the base paper thickness which is the thickness of the laminated paper before heat fusion, in accordance with the base paper thickness. The method for producing a laminated paper according to claim 13 or 14, wherein the rotation speed of the heat seal roller is increased/decreased to control the rotation. 前記ヒートシールローラの熱圧着温度を一定に維持すると共に、前記ヒートシールローラの回転速度が熱融着前積層紙の不織布原料シートの厚みである不織布厚に比例して増減するよう、前記不織布厚に応じて前記ヒートシールローラの回転速度を増減変更して回転制御することを特徴とする請求項13又は14記載の積層紙の製造方法。   While maintaining the thermocompression bonding temperature of the heat-sealing roller constant, the rotation speed of the heat-sealing roller is increased or decreased in proportion to the thickness of the non-woven fabric raw sheet of the laminated paper before heat-sealing so as to increase or decrease the thickness of the non-woven fabric. The method for producing a laminated paper according to claim 13 or 14, wherein the rotation speed of the heat-sealing roller is increased/decreased to control the rotation according to the above. 前記ヒートシールローラの回転速度を一定に維持すると共に、前記ヒートシールローラの熱圧着温度が熱融着前積層紙の不織布原料シートの厚みである不織布厚に比例して増減するよう、前記不織布厚に応じて前記ヒートシールローラの熱圧着温度を増減変更して温度制御することを特徴とする請求項13又は14記載の積層紙の製造方法。   While maintaining the rotation speed of the heat seal roller constant, the thermocompression bonding temperature of the heat seal roller is increased or decreased in proportion to the nonwoven fabric thickness which is the thickness of the nonwoven fabric raw material sheet of the laminated paper before heat fusion so that the nonwoven fabric thickness The method for producing a laminated paper according to claim 13 or 14, wherein the temperature of the heat-sealing roller is controlled by increasing or decreasing the thermocompression bonding temperature. 前記ヒートシールローラの内部には、それぞれ、密閉空間が形成されると共に、前記ヒートシールローラの内部空間は、真空状態に維持された密閉空間となっており、
前記ヒートシールローラの内部空間に、それぞれ、外部の水供給手段を接続し、この水供給手段から前記ヒートシールローラの内部空間に、それぞれ、水分を供給すると共に、前記ヒートシールローラの加熱時に、その水分を加熱して得た高温水蒸気を前記ヒートシールローラの内面に薄い層状又は膜状となるように付着させ、その層状又は膜状の水蒸気により、前記ヒートシールローラの全体を、その周方向の全体及び長さ方向の全体にわたって均一な温度に維持し、全ての前記熱圧着凸部の熱圧着面の全面にわたって、前記熱圧着温度が均一かつ均等に維持されるように制御することを特徴とする請求項13又は14記載の積層紙の製造方法。
Inside the heat seal roller, a sealed space is formed, and the internal space of the heat seal roller is a sealed space maintained in a vacuum state,
An external water supply means is connected to the internal space of the heat seal roller, and water is supplied from the water supply means to the internal space of the heat seal roller, and at the time of heating the heat seal roller, The high-temperature steam obtained by heating the moisture is adhered to the inner surface of the heat-sealing roller so as to form a thin layer or film, and the layer-shaped or film-shaped steam causes the entire heat-sealing roller to move in the circumferential direction. Is maintained at a uniform temperature over the entire length and the entire length direction, and the thermocompression bonding temperature is controlled to be maintained uniformly and evenly over the entire thermocompression bonding surface of all the thermocompression bonding convex portions. The method for producing a laminated paper according to claim 13 or 14.
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