JP7094433B1 - Papermaking felt base cloth and papermaking felt made by joining them together. - Google Patents
Papermaking felt base cloth and papermaking felt made by joining them together. Download PDFInfo
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- JP7094433B1 JP7094433B1 JP2021213400A JP2021213400A JP7094433B1 JP 7094433 B1 JP7094433 B1 JP 7094433B1 JP 2021213400 A JP2021213400 A JP 2021213400A JP 2021213400 A JP2021213400 A JP 2021213400A JP 7094433 B1 JP7094433 B1 JP 7094433B1
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- 239000004744 fabric Substances 0.000 title claims abstract description 66
- 238000005304 joining Methods 0.000 title description 4
- 239000000463 material Substances 0.000 claims abstract description 34
- 239000004677 Nylon Substances 0.000 claims description 23
- 229920001778 nylon Polymers 0.000 claims description 23
- 229920000297 Rayon Polymers 0.000 claims description 12
- 239000002964 rayon Substances 0.000 claims description 12
- 239000000835 fiber Substances 0.000 claims description 9
- 238000010586 diagram Methods 0.000 abstract description 2
- 239000000123 paper Substances 0.000 description 48
- 230000000052 comparative effect Effects 0.000 description 17
- 238000004519 manufacturing process Methods 0.000 description 11
- 229920005989 resin Polymers 0.000 description 10
- 239000011347 resin Substances 0.000 description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 9
- 239000002250 absorbent Substances 0.000 description 6
- 230000018044 dehydration Effects 0.000 description 6
- 238000006297 dehydration reaction Methods 0.000 description 6
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- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 210000002268 wool Anatomy 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
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- 244000025254 Cannabis sativa Species 0.000 description 1
- 235000012766 Cannabis sativa ssp. sativa var. sativa Nutrition 0.000 description 1
- 235000012765 Cannabis sativa ssp. sativa var. spontanea Nutrition 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 125000003277 amino group Chemical group 0.000 description 1
- 238000010009 beating Methods 0.000 description 1
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- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
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- 235000005607 chanvre indien Nutrition 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
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- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
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- 239000002655 kraft paper Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002759 woven fabric Substances 0.000 description 1
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F7/00—Other details of machines for making continuous webs of paper
- D21F7/08—Felts
- D21F7/10—Seams thereof
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Abstract
【課題】 湿紙からの脱水を均一に行うことができ、脱水後の紙におけるシームマークの発生の抑制が可能な抄紙用フェルト用基布を提供する。【解決手段】 湿紙側面を形成する湿紙側層、ロール側面を形成するロール側層、および、湿紙側層とロール側層とを連結する、内部にＣＤ方向に芯線が通されるシームループ部を両端に有する抄紙用フェルト用基布であって、湿紙側層およびロール側層は、フェルト走行方向（ＭＤ方向）のＭＤ糸材およびフェルト横断方向（ＣＤ方向）のＣＤ糸材からなり、シームループ部はＭＤ糸材により形成され、抄紙用フェルト用基布は、一方のシームループ部外側近傍であって、かつ、他方のシームループ部内側に、または他方のシームループ部内側と外側に、通される１または２以上の充填糸をさらに含み、充填糸が、親水性の糸である、前記抄紙用フェルト用基布。【選択図】 図３PROBLEM TO BE SOLVED: To provide a felt base cloth for papermaking capable of uniformly dehydrating from wet paper and suppressing the generation of seam marks on the dehydrated paper. SOLUTION: A wet paper side layer forming a wet paper side surface, a roll side layer forming a roll side surface, and a seam connecting a wet paper side layer and a roll side layer, through which a core wire is passed in the CD direction. It is a base cloth for felt for papermaking having loop portions at both ends, and the wet paper side layer and the roll side layer are made of MD thread material in the felt running direction (MD direction) and CD thread material in the felt transverse direction (CD direction). The seam loop portion is formed of MD thread material, and the papermaking felt base fabric is near the outside of one seam loop portion and inside the other seam loop portion or inside the other seam loop portion. The felt base fabric for papermaking, further comprising one or more filling yarns to be passed on the outside, wherein the filling yarn is a hydrophilic yarn. [Selection diagram] Fig. 3
Description
本発明は、抄紙用フェルト用基布およびこれをつなぎ合わされてなる抄紙用フェルトに関する。 The present invention relates to a base cloth for papermaking felt and a felt for papermaking made by joining the base cloths.
従来から製紙機械のプレスパートでは、プレスフェルトと一対のプレスロールまたはプレスロールとシュープレスにより湿紙の搾水作業を行っている。このプレスフェルトとしては、図１に示されるシームループを有する有端状のものが知られている。すなわち、フェルトＦは有端状に構成されており、それぞれの端部に複数のシームループＬが形成されている。フェルトＦは、例えば図２に示すように織布による基布Ｂと、２層のバット層Ｗとによって構成される。バット層Ｗは、基布Ｂ上に積層された短繊維のウエッブ繊維を、ニードルパンチにより基布Ｂと共に絡合一体化されている。基布Ｂは、フェルト走行方向（ＭＤ方向）の糸材と、フェルト横断方向（ＣＤ方向）糸材を製織した織布により構成される。そして、ＭＤ方向の糸材によりシームループＬが構成される。シームループＬの内部にはＣＤ方向に芯線Ｓが通される。 Conventionally, in the press part of a papermaking machine, wet paper is squeezed by a press felt and a pair of press rolls or a press roll and a shoe press. As this press felt, an end-shaped one having a seam loop shown in FIG. 1 is known. That is, the felt F is configured in an endped shape, and a plurality of seam loops L are formed at each end. As shown in FIG. 2, for example, the felt F is composed of a base cloth B made of a woven cloth and a two-layer butt layer W. In the butt layer W, short web fibers laminated on the base cloth B are entangled and integrated together with the base cloth B by needle punching. The base cloth B is composed of a yarn material in the felt traveling direction (MD direction) and a woven fabric in which the yarn material in the felt crossing direction (CD direction) is woven. Then, the seam loop L is formed by the thread material in the MD direction. A core wire S is passed through the seam loop L in the CD direction.
このようなプレスフェルトとしては、バット繊維の脱毛の防止や芯線挿入抵抗の低下を図るために、周辺に充填糸が挿入されたシームループ部を有するプレスフェルトが知られている（特許文献１～４）。
一方で、シームループ部を有するプレスフェルトにおいては、脱水後の紙においてシート上にマークが発生することがあると報告されている（特許文献２）。
As such a press felt, a press felt having a seam loop portion in which a filling thread is inserted is known in order to prevent hair loss of the butt fiber and reduce the core wire insertion resistance (Patent Documents 1 to 1). 4).
On the other hand, in the press felt having a seam loop portion, it has been reported that marks may be generated on the sheet of the dehydrated paper (Patent Document 2).
本発明の目的は、脱水後の紙におけるシームマークの発生の抑制が可能なシームループ部を有する抄紙用フェルト用基布を提供することにある。 An object of the present invention is to provide a felt base fabric for papermaking, which has a seam loop portion capable of suppressing the generation of seam marks on paper after dehydration.
上記課題を解決すべく鋭意研究する中で、本発明者らは、シームループ部を有する抄紙用フェルト用基布において、一方のシームループ部外側近傍であって、かつ、他方のシームループ部内側に、または他方のシームループ部内側と外側に、１または２以上の親水性の充填糸を挿入することにより、シームマークの発生を抑制できることを見出し、さらに研究を進めた結果、本発明を完成するに至った。 In earnest research to solve the above problems, the present inventors have found that in a felt base fabric for papermaking having a seam loop portion, the vicinity of the outside of one seam loop portion and the inside of the other seam loop portion. We have found that the occurrence of seam marks can be suppressed by inserting one or more hydrophilic filled yarns inside and outside the seam loop portion on or on the other side, and as a result of further research, the present invention was completed. I came to do it.
すなわち、本発明は以下に関する。
＜１＞ 湿紙側面を形成する湿紙側層、ロール側面を形成するロール側層、および、湿紙側層とロール側層とを連結する、内部にＣＤ方向に芯線が通されるシームループ部を両端に有する抄紙用フェルト用基布であって、
湿紙側層およびロール側層は、フェルト走行方向（ＭＤ方向）のＭＤ糸材およびフェルト横断方向（ＣＤ方向）のＣＤ糸材からなり、シームループ部はＭＤ糸材により形成され、
抄紙用フェルト用基布は、一方のシームループ部外側近傍であって、かつ、他方のシームループ部内側に、または他方のシームループ部内側と外側に、通される１または２以上の充填糸をさらに含み、
充填糸が、親水性の糸である、
前記抄紙用フェルト用基布。
＜２＞ 親水性の糸が、相対湿度６５％、２０℃（標準状態）において、水分率６％以上の繊維である、＜１＞に記載の抄紙用フェルト用基布。
＜３＞ 親水性の糸が、レーヨンまたは親水処理されたナイロンである、＜１＞または＜２＞に記載の抄紙用フェルト用基布。
＜４＞ ＜１＞～＜３＞のいずれか一つに記載の抄紙用フェルト用基布がつなぎ合わされてなる、抄紙用フェルト。
That is, the present invention relates to the following.
<1> A seam loop that connects the wet paper side layer forming the wet paper side surface, the roll side layer forming the roll side surface, and the wet paper side layer and the roll side layer, and the core wire is passed through the inside in the CD direction. A base cloth for felt for papermaking that has parts at both ends.
The wet paper side layer and the roll side layer are composed of an MD thread material in the felt traveling direction (MD direction) and a CD thread material in the felt crossing direction (CD direction), and the seam loop portion is formed of the MD thread material.
The papermaking felt base fabric is one or more filled yarns that are passed near the outside of one seam loop and inside the other seam loop, or inside and outside the other seam loop. Including
The filling thread is a hydrophilic thread,
The base cloth for felt for papermaking.
<2> The felt base cloth for papermaking according to <1>, wherein the hydrophilic yarn is a fiber having a moisture content of 6% or more at a relative humidity of 65% and a moisture content of 20 ° C. (standard temperature).
<3> The felt base cloth for papermaking according to <1> or <2>, wherein the hydrophilic thread is rayon or hydrophilically treated nylon.
<4> A papermaking felt to which the base cloth for papermaking felt according to any one of <1> to <3> is joined.
本発明の抄紙用フェルト用基布を用いることにより、脱水後の紙におけるシームマークの発生を抑制することができる。
脱水後の紙におけるシームマークの発生を抑制できるメカニズムについては、必ずしも明らかではないが、基布とシームループ部とで吸水性に差があり、湿紙から移動した水が均一に脱水されないことがシームマークの発生原因であると考えられるところ、一方のシームループ部外側近傍であって、かつ、他方のシームループ部内側に、または他方のシームループ部内側と外側に、１または２以上の親水性の充填糸を挿入することにより、基布とシームループ部との吸水性の差を補い、湿紙から移動した水を均一に脱水することができ、脱水後の紙におけるシームマークの発生を抑制できることによるものと考えられる。
By using the felt base cloth for papermaking of the present invention, it is possible to suppress the generation of seam marks on the paper after dehydration.
The mechanism that can suppress the generation of seam marks on paper after dehydration is not always clear, but there is a difference in water absorption between the base cloth and the seam loop part, and the water transferred from the wet paper is not uniformly dehydrated. One or more hydrophilics near the outside of one seam loop and inside the other seam loop, or inside and outside the other seam loop, where it is thought to be the cause of the seam mark. By inserting a sex-filled yarn, the difference in water absorption between the base cloth and the seam loop part can be compensated, and the water transferred from the wet paper can be uniformly dehydrated, and the generation of seam marks on the dehydrated paper can be generated. It is thought that this is due to the fact that it can be suppressed.
本発明の抄紙用フェルト用基布は、湿紙側面を形成する湿紙側層、ロール側面を形成するロール側層、および、湿紙側層とロール側層とを連結する、内部にＣＤ方向に芯線が通されるシームループ部を両端に有し、湿紙側層およびロール側層は、フェルト走行方向（ＭＤ方向）のＭＤ糸材およびフェルト横断方向（ＣＤ方向）のＣＤ糸材からなり、シームループ部はＭＤ糸材により形成され、抄紙用フェルト用基布は、一方のシームループ部外側近傍であって、かつ、他方のシームループ部内側に、または他方のシームループ部内側と外側に、通される１または２以上の充填糸をさらに含み、充填糸が、親水性の糸である、抄紙用フェルト用基布である（図３）。 The felt base cloth for papermaking of the present invention has a wet paper side layer forming a wet paper side surface, a roll side layer forming a roll side surface, and an internal CD direction connecting the wet paper side layer and the roll side layer. The wet paper side layer and the roll side layer are composed of an MD thread material in the felt running direction (MD direction) and a CD thread material in the felt crossing direction (CD direction). , The seam loop portion is formed of MD thread material, and the felt base cloth for papermaking is near the outside of one seam loop portion and inside the other seam loop portion, or inside and outside the other seam loop portion. Is a felt base fabric for papermaking, further comprising one or more filled yarns to be passed through, wherein the filled yarn is a hydrophilic yarn (FIG. 3).
本発明の抄紙用フェルト用基布は、湿紙側面を形成する湿紙側層、ロール側面を形成するロール側層、および、湿紙側層とロール側層とを連結する、内部にＣＤ方向に芯線が通されるシームループ部を両端に有する。湿紙側層およびロール側層は、フェルト走行方向（ＭＤ方向）のＭＤ糸材およびフェルト横断方向（ＣＤ方向）のＣＤ糸材からなり、シームループ部はＭＤ糸材により形成される。 The felt base cloth for papermaking of the present invention has a wet paper side layer forming a wet paper side surface, a roll side layer forming a roll side surface, and an internal CD direction connecting the wet paper side layer and the roll side layer. It has seam loops at both ends through which the core wire is passed. The wet paper side layer and the roll side layer are composed of an MD thread material in the felt traveling direction (MD direction) and a CD thread material in the felt crossing direction (CD direction), and the seam loop portion is formed of the MD thread material.
本発明の抄紙用フェルト用基布は、一方のシームループ部外側近傍であって、かつ、他方のシームループ部内側に、または他方のシームループ部内側と外側に、通される１または２以上の充填糸をさらに含む。
本発明の充填糸は、親水性の糸である。本発明において、「親水性の糸」は、湿紙から抄紙用フェルト用基布に移動した水を効果的に吸収することができる糸を指す。充填糸が親水性の糸である場合、脱水後の紙におけるシームマークの発生を抑制することができる。親水性の糸は、好ましくは、相対湿度６５％、２０℃（標準状態）において、水分率６％以上、より好ましくは、水分率８％以上、さらに好ましくは、水分率１０％以上の繊維である。
他方、充填糸が親水性の糸ではない場合、脱水後の紙においてシームマークが発生する可能性が高い。
The felt base cloth for papermaking of the present invention is one or two or more that are passed near the outside of one seam loop portion and inside the other seam loop portion, or inside and outside the other seam loop portion. Further includes the filling yarn of.
The filled yarn of the present invention is a hydrophilic yarn. In the present invention, the "hydrophilic thread" refers to a thread capable of effectively absorbing water transferred from the wet paper to the felt base cloth for papermaking. When the filling yarn is a hydrophilic yarn, the generation of seam marks on the paper after dehydration can be suppressed. The hydrophilic yarn is preferably a fiber having a moisture content of 6% or more, more preferably 8% or more, still more preferably 10% or more at a relative humidity of 65% and 20 ° C. (standard temperature). be.
On the other hand, if the filled yarn is not a hydrophilic yarn, seam marks are likely to occur on the dehydrated paper.
親水性の糸としては、これに限定されるものではないが、レーヨン（水分率：約１１％）、親水処理されたナイロン（水分率：約２０％）、羊毛（水分率：約１６％）、キュプラ（水分率：約１２～１４％）、麻（水分率：約７～１０％）、絹（水分率：約９％）、綿（水分率：約７％）、などが挙げられる。ここで、「親水処理されたナイロン」とは、親水性の糸ではないナイロンに吸水性樹脂を付着させることにより、水分率を約２０％に調整したナイロンを指す。吸水性樹脂は、ヒドロキシル基、カルボキシル基、またはアミノ基などを有する親水性基を有する樹脂であり、例えば、ウレタン系樹脂、セルロース系樹脂、アクリル系樹脂などが挙げられる。親水性の糸としては、シームマークの発生を抑制および耐洗浄性（耐薬品性）を備えた持続性の観点から、レーヨンおよび親水処理されたナイロンが好ましい。 The hydrophilic yarn is not limited to this, but rayon (moisture content: about 11%), hydrophilic treated nylon (moisture content: about 20%), wool (moisture content: about 16%). , Cupra (moisture content: about 12-14%), hemp (moisture content: about 7-10%), silk (moisture content: about 9%), cotton (moisture content: about 7%), and the like. Here, the "hydrophilic treated nylon" refers to nylon whose moisture content is adjusted to about 20% by adhering a water-absorbent resin to nylon which is not a hydrophilic thread. The water-absorbent resin is a resin having a hydrophilic group having a hydroxyl group, a carboxyl group, an amino group, or the like, and examples thereof include urethane-based resins, cellulose-based resins, and acrylic-based resins. As the hydrophilic yarn, rayon and hydrophilically treated nylon are preferable from the viewpoint of suppressing the generation of seam marks and having cleaning resistance (chemical resistance) and durability.
充填糸の本数は、１または２以上であってもよく、シームマークの発生を抑制できれば特に限定されない。充填糸は、１本を単独で挿入してもよく、複数本を撚り合わせたものを挿入してもよい。また、複数本を複数箇所に、例えば、１本を１箇所に挿入した後、３本を撚り合わせたものを別の箇所に挿入してもよい。
充填糸は、各々について、一方のシームループ部外側近傍であって、かつ、他方のシームループ部内側に、または他方のシームループ部内側と外側に、ＣＤ方向に挿入され、湿紙側層のＭＤ糸材に織り込む態様、湿紙側層とロール側層との中間にストレートに挿入する態様、ロール側層のＭＤ糸材に織り込む態様などが挙げられるが、シームマークの発生を抑制できれば特に限定されない。また、充填糸を湿紙側層またはロール側層のＭＤ糸材に織り込む際の組織は、１／１ヒラ、２／１崩し、３／１崩し、４／１崩し、５／１崩し、６／１崩し、７／１崩しなどが挙げられるが、シームマークの発生を抑制できれば特に限定されない。
The number of filling threads may be 1 or 2 or more, and is not particularly limited as long as the generation of seam marks can be suppressed. As the filling thread, one may be inserted alone, or a plurality of twisted threads may be inserted. Further, a plurality of pieces may be inserted into a plurality of places, for example, one piece may be inserted in one place, and then a twisted three pieces may be inserted in another place.
The filling yarn is inserted in the CD direction in the vicinity of the outside of one seam loop portion and inside the other seam loop portion, or inside and outside the other seam loop portion, respectively, and the filling yarn is inserted in the wet paper side layer. Examples include a mode of weaving into the MD yarn material, a mode of inserting straight between the wet paper side layer and the roll side layer, a mode of weaving into the MD yarn material of the roll side layer, etc., but it is particularly limited as long as the occurrence of seam marks can be suppressed. Not done. Further, the structure when the filled yarn is woven into the MD yarn material of the wet paper side layer or the roll side layer is 1/1 flat, 2/1 collapse, 3/1 collapse, 4/1 collapse, 5/1 collapse, 6 Examples thereof include 1/1 collapse and 7/1 collapse, but the present invention is not particularly limited as long as the occurrence of seam marks can be suppressed.
本発明の抄紙用シームフェルト用基布の製造方法には特に制限がない。典型的には、織機上では緯糸のＭＤ糸と織機上では経糸のＣＤ糸が織機で織られることにより得られ、前記基布端部にてＭＤ糸が芯線に絡むことによってループを形成し、エンドレス状の基布が得られる。 The method for producing the base fabric for seam felt for papermaking of the present invention is not particularly limited. Typically, the MD yarn of the weft on the loom and the CD yarn of the warp on the loom are woven by the loom, and the MD yarn is entangled with the core wire at the end of the base fabric to form a loop. An endless base cloth can be obtained.
本発明は、さらに、上述の抄紙用フェルト用基布がつなぎ合わされてなる抄紙用フェルトにも関する。かかる抄紙用フェルトの好ましい態様は、抄紙用フェルト用基布について述べた態様と同一である。 The present invention further relates to a papermaking felt formed by joining the above-mentioned papermaking felt base fabrics. The preferred embodiment of the papermaking felt is the same as that described for the papermaking felt base fabric.
以下、本発明の抄紙用フェルト用基布がつなぎ合わされてなる抄紙用フェルトについて、実施例を用いて詳しく説明するが、これらは本発明を何ら限定するものではない。 Hereinafter, the felt for papermaking, which is formed by joining the base fabrics for the felt for papermaking of the present invention, will be described in detail with reference to examples, but these are not limited to the present invention.
［実施例１～７、比較例１～２］
（１）抄紙用フェルト用基布の製造
（ａ）実施例１の抄紙用フェルト用基布の製造
基布の湿紙側層のＭＤ糸材に５３０ｄの糸を３本撚り合わせてなる１５９０ｄのレーヨンスパン糸を１／１ヒラの組織で織り込み、基布のロール側層のＭＤ糸材に１５００ｄのナイロンスパン糸を１／１ヒラの組織で織り込んだ。
基布製織後には、ニードリングにより繊維層を積層一体化してフェルトを形成し、さらにニードル用の保護芯線を引き抜き、ループ上部の繊維層をカットして分離することで、実施例１の抄紙用フェルト用基布を得た。
[Examples 1 to 7, Comparative Examples 1 to 2]
(1) Manufacture of base cloth for felt for paper making (a) Manufacture of base cloth for felt for paper making according to Example 1 1590d made by twisting three 530d threads to the MD yarn material of the wet paper side layer of the base cloth. Rayon spun yarn was woven with a 1/1 hill structure, and 1500d nylon spun yarn was woven with a 1/1 hill structure into the MD yarn material of the roll side layer of the base fabric.
After weaving the base fabric, the fiber layers are laminated and integrated by needling to form felt, and the protective core wire for the needle is pulled out, and the fiber layer at the upper part of the loop is cut and separated for papermaking according to Example 1. Obtained a base cloth for felt.
（ｂ）実施例２～３および比較例１の抄紙用フェルト用基布の製造
実施例２については、基布の湿紙側層のＭＤ糸材に１５００ｄのナイロンスパン糸を１／１ヒラの組織で織り込み、基布のロール側層のＭＤ糸材に５３０ｄの糸を３本撚り合わせてなる１５９０ｄのレーヨンスパン糸を１／１ヒラの組織で織り込み、実施例３については、基布の湿紙側層のＭＤ糸材に、吸水性樹脂を付着させて親水処理を施した、具体的にはウレタン系吸水性樹脂を塗布した１５００ｄのナイロンスパン糸を１／１ヒラの組織で織り込み、比較例１については、基布の湿紙側層のＭＤ糸材に、１５００ｄのナイロンスパン糸を１／１ヒラの組織で織り込んだことを除き、実施例１の抄紙用フェルト用基布の製造で述べたことと同様の方法にて実施例２～３および比較例１の抄紙用フェルト用基布を得た。
(B) Production of base cloth for felt for papermaking of Examples 2 to 3 and Comparative Example 1 In Example 2, 1500 d nylon spun yarn was used as the MD thread material of the wet paper side layer of the base cloth in 1/1 flat. Weaving with a structure, 1590d nylon spun yarn made by twisting three 530d yarns into the MD yarn material of the roll side layer of the base fabric is woven with a 1/1 hill structure, and in Example 3, the wetness of the base fabric. A 1500d nylon spun yarn coated with a water-absorbent resin and subjected to a hydrophilic treatment, specifically a urethane-based water-absorbent resin, is woven into the MD thread material of the paper side layer with a 1/1 hill structure for comparison. Regarding Example 1, in the production of the felt base cloth for papermaking of Example 1, except that 1500 d nylon spun yarn was woven into the MD thread material of the wet paper side layer of the base cloth with a structure of 1/1 flat. The base cloth for the felt for papermaking of Examples 2 to 3 and Comparative Example 1 was obtained by the same method as described above.
（ｃ）実施例４の抄紙用フェルト用基布の製造
基布の湿紙側層のＭＤ糸材に１５００ｄのナイロンスパン糸を１／１ヒラの組織で織り込み、基布のロール側層のＭＤ糸材に１５００ｄのナイロンスパン糸を１／１ヒラの組織で織り込み、湿紙側層とロール側層との中間に１７７ｄの糸を１０本撚り合わせてなる１７７０ｄのレーヨンスパン糸を、ＣＤ糸材にもＭＤ糸材にも絡ませず、ストレートに挿入した。
基布製織後には、ニードリングにより繊維層を積層一体化してフェルトを形成し、さらにニードル用の保護芯線を引き抜き、ループ上部の繊維層をカットして分離することで、実施例４の抄紙用フェルト用基布を得た。
(C) Production of base cloth for felt for paper making according to Example 4 1500d nylon spun yarn is woven into the MD yarn material of the wet paper side layer of the base cloth with a 1/1 flat structure, and the MD of the roll side layer of the base cloth is woven. A 1500d nylon spun yarn is woven into the yarn material with a 1/1 flat structure, and a 1770d rayon spun yarn made by twisting 10 177d yarns between the wet paper side layer and the roll side layer is used as a CD yarn material. It was inserted straight without being entangled with the MD thread material.
After weaving the base fabric, the fiber layers are laminated and integrated by needling to form felt, and the protective core wire for the needle is pulled out, and the fiber layer at the upper part of the loop is cut and separated for papermaking according to Example 4. Obtained a base cloth for felt.
（ｄ）実施例５～７および比較例２の抄紙用フェルト用基布の製造
実施例５については、湿紙側層とロール側層との中間に１７７ｄの糸を５本撚り合わせてなる８８５ｄのレーヨンスパン糸をストレートに挿入し、実施例６については、湿紙側層とロール側層との中間に、吸水性樹脂を付着させて親水処理を施した、具体的にはウレタン系吸水性樹脂を塗布した１５００ｄのナイロンスパン糸をストレートに挿入し、実施例７については、湿紙側層とロール側層との中間に８００ｄの羊毛をストレートに挿入し、比較例２については、湿紙側層とロール側層との中間に８００ｄの無撚糸をストレートに挿入したことを除き、実施例４の抄紙用フェルト用基布の製造で述べたことと同様の方法にて実施例５～７および比較例２の抄紙用フェルト用基布を得た。
(D) Production of base cloth for felt for papermaking in Examples 5 to 7 and Comparative Example 2 In Example 5, 585d yarns of 177d are twisted between the wet paper side layer and the roll side layer. In Example 6, the rayon spun yarn of No. 1 was inserted straight, and in Example 6, a water-absorbent resin was adhered between the wet paper side layer and the roll side layer to perform a hydrophilic treatment, specifically, a urethane-based water-absorbent material. A 1500d nylon spun yarn coated with a resin is inserted straight, and in Example 7, 800d wool is inserted straight between the wet paper side layer and the roll side layer, and in Comparative Example 2, the wet paper is inserted. Examples 5 to 7 are carried out in the same manner as described in the production of the base cloth for felt for papermaking in Example 4, except that 800d untwisted yarn is inserted straight between the side layer and the roll side layer. And a base cloth for felt for papermaking of Comparative Example 2 was obtained.
なお、実施例１～７および比較例１～２において用いたレーヨンスパン糸（相対湿度６５％、２０℃（標準状態）における水分率が約１１％）、親水処理されたナイロンスパン糸（同約２０％）、羊毛（同約１６％）は、親水性の糸である。一方で、ナイロンスパン糸（同約５％）およびナイロン無撚糸（同約５％）は、親水性の糸ではない。 The rayon spun yarns used in Examples 1 to 7 and Comparative Examples 1 and 2 (relative humidity 65%, moisture content at 20 ° C. (standard temperature) of about 11%), and hydrophilic treated nylon spun yarns (same as about). 20%) and rayon (about 16%) are hydrophilic threads. On the other hand, nylon spun yarn (about 5%) and nylon untwisted yarn (about 5%) are not hydrophilic yarns.
（２）抄紙用フェルトの製造
実施例１～７および比較例１～２の抄紙用フェルト用基布に対して、シーム部に直径０．３５ｍｍのモノフィラメントを５本引き揃えた芯線を挿入し、それぞれ、実施例１～７および比較例１～２の抄紙用フェルトを得た。
(2) Manufacture of felt for papermaking Insert a core wire of five monofilaments having a diameter of 0.35 mm into the seam portion of the felt base cloth for papermaking of Examples 1 to 7 and Comparative Examples 1 to 2. Papermaking felts of Examples 1 to 7 and Comparative Examples 1 and 2, respectively, were obtained.
（３）評価用サンプルの製造
実施例１～７および比較例１～２の抄紙用フェルト用基布に対して、シーム部が中心になるように直径７０ｍｍの円形状にサンプルを打ち抜き、実施例１～７および比較例１～２の評価用サンプルを得た。
(3) Production of Evaluation Samples Examples 1 to 7 and Comparative Examples 1 to 2 were punched into a circular shape having a diameter of 70 mm so that the seam portion was at the center of the felt base cloth for papermaking. Evaluation samples 1 to 7 and Comparative Examples 1 to 2 were obtained.
（４）サンプル製造および評価
以下の手順に従って、実施例１～７および比較例１～２のサンプルを製造および評価した。
（ａ）実施例１～７および比較例１～２の抄紙用フェルト用基布に対して、シームループ部が中心になるように直径７０ｍｍの円形状に打ち抜き、実施例１～７および比較例１～２のサンプルを得た。サンプルを水に１時間以上浸漬して、十分に水に馴染ませた。試験前にサンプルのフェルトの含水率を約３０％に調整した。
（ｂ）ＬＢＫＰ（Leaf bleached kraft pulp）を叩解度が３００～４００Ｃ．Ｓ．Ｆ．(canadian standard freeness;紙原料の細かさの指標）となるように叩解し、続けてシートフォーマーで坪量２２０ｇｓｍの湿紙を作成した。試験用に６０ｍｍの円形状で打ち抜き、試験前に湿紙の含水率を約８０％に調整した。
(4) Sample production and evaluation The samples of Examples 1 to 7 and Comparative Examples 1 and 2 were produced and evaluated according to the following procedure.
(A) The felt base fabrics for papermaking of Examples 1 to 7 and Comparative Examples 1 and 2 are punched into a circular shape having a diameter of 70 mm so that the seam loop portion is at the center, and Examples 1 to 7 and Comparative Examples are used. One or two samples were obtained. The sample was immersed in water for at least 1 hour to allow it to fully immerse in water. Before the test, the water content of the felt of the sample was adjusted to about 30%.
(B) LBKP (Leaf bleached kraft pulp) with a degree of beating of 300 to 400 C.I. S. F. (Canadian standard freeness; an index of the fineness of the paper raw material) was beaten, and then a wet paper with a basis weight of 220 gsm was prepared with a sheet former. For the test, it was punched out in a circular shape of 60 mm, and the water content of the wet paper was adjusted to about 80% before the test.
（ｃ）機構が自由落下のプレス盤を、加圧の面圧が５０ｋｇ／ｃｍ２となるように落下高さを調整した。
（ｄ）プレス盤にフェルトと湿紙を重ねて置き、所定の高さからプレス盤を自由落下させて、湿紙から脱水およびシームマークを採取した。
(C) The drop height of the press machine in which the mechanism freely falls was adjusted so that the surface pressure of pressurization was 50 kg / cm 2 .
(D) Felt and wet paper were placed on the press board in an overlapping manner, and the press board was freely dropped from a predetermined height to collect dehydration and seam marks from the wet paper.
（ｅ）プレス後の湿紙を、乾燥時に折れ曲がらないようにリングで挟んだ状態で乾燥させた。
（ｆ）シームマーク評価は目視とし、シームマークの太さと明瞭の良し悪しを下記のとおり評価した。評価を表１にまとめる。
◎（非常に良好）：シームマークの巾が非常に狭く、目視ではほとんど観察されない。
〇（良好）：シームマークの巾が狭く、実用に耐えうる。
×（不良）：シームマークの巾が広く、実用面で問題がある。
(E) The wet paper after pressing was dried while being sandwiched between rings so as not to bend during drying.
(F) The seam mark was visually evaluated, and the thickness and clarity of the seam mark were evaluated as follows. The evaluations are summarized in Table 1.
◎ (Very good): The width of the seam mark is very narrow and hardly observed visually.
〇 (Good): The width of the seam mark is narrow and can withstand practical use.
× (defective): The width of the seam mark is wide, and there is a problem in practical use.
湿紙側層のＭＤ糸材に親水性の糸であるレーヨンスパン糸または親水処理されたナイロンスパン糸を織り込んだ実施例１および３は、同位置に親水性の糸ではないナイロンスパン糸を織り込んだ比較例１と比べて、シームマークの発生が抑制された。また、ロール側層のＭＤ糸材に親水性の糸であるレーヨンスパン糸を織り込んだ実施例２は、同位置に親水性の糸ではないナイロンスパン糸を織り込んだ比較例１と比べて、シームマークの発生が抑制された。さらに、湿紙側層とロール側層との中間に親水性の糸であるレーヨンスパン糸、親水処理されたナイロンスパン糸、または羊毛を挿入した実施例４～７についても、同位置に親水性の糸ではないナイロンスパン糸を挿入した比較例２と比べて、シームマークの発生が抑制された。 In Examples 1 and 3 in which rayon spun yarn which is a hydrophilic yarn or nylon spun yarn which has been treated with hydrophilicity is woven into the MD yarn material of the wet paper side layer, nylon spun yarn which is not a hydrophilic yarn is woven at the same position. However, the occurrence of seam marks was suppressed as compared with Comparative Example 1. Further, Example 2 in which the rayon spun yarn which is a hydrophilic yarn is woven into the MD yarn material of the roll side layer is a seam as compared with Comparative Example 1 in which a nylon spun yarn which is not a hydrophilic yarn is woven at the same position. The generation of marks was suppressed. Further, Examples 4 to 7 in which rayon spun yarn, which is a hydrophilic yarn, nylon spun yarn treated with hydrophilicity, or wool is inserted between the wet paper side layer and the roll side layer are also hydrophilic at the same position. The generation of seam marks was suppressed as compared with Comparative Example 2 in which a nylon spun yarn other than the yarn of No. 2 was inserted.
本発明の抄紙用フェルト用基布を用いることにより、脱水後の紙におけるシームマークの発生を抑制することができる。 By using the felt base cloth for papermaking of the present invention, it is possible to suppress the generation of seam marks on the paper after dehydration.
Ｆ：抄紙用フェルト
Ｌ：シームループ
Ｂ：基布
Ｗ：バット層
Ｓ：芯線
F: Papermaking felt L: Seam loop B: Base cloth W: Butt layer S: Core wire
Claims (3)
湿紙側層およびロール側層は、フェルト走行方向（ＭＤ方向）のＭＤ糸材およびフェルト横断方向（ＣＤ方向）のＣＤ糸材からなり、シームループ部はＭＤ糸材により形成され、
抄紙用フェルト用基布は、一方のシームループ部外側近傍であって、かつ、他方のシームループ部内側に、または他方のシームループ部内側と外側に、通される１または２以上の充填糸をさらに含み、
充填糸が、親水性の糸であり、
親水性の糸が、相対湿度６５％、２０℃（標準状態）において、水分率６％以上の繊維である、
前記抄紙用フェルト用基布。 Both ends of the wet paper side layer that forms the wet paper side surface, the roll side layer that forms the roll side surface, and the seam loop portion that connects the wet paper side layer and the roll side layer, through which the core wire is passed in the CD direction. It is a base cloth for felt for papermaking, which is owned by
The wet paper side layer and the roll side layer are composed of an MD thread material in the felt traveling direction (MD direction) and a CD thread material in the felt crossing direction (CD direction), and the seam loop portion is formed of the MD thread material.
The papermaking felt base fabric is one or more filled yarns that are passed near the outside of one seam loop and inside the other seam loop, or inside and outside the other seam loop. Including
The filling thread is a hydrophilic thread ,
The hydrophilic yarn is a fiber having a moisture content of 6% or more at a relative humidity of 65% and 20 ° C. (standard temperature).
The base cloth for felt for papermaking.
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| PCT/JP2022/047844 WO2023127781A1 (en) | 2021-12-27 | 2022-12-26 | Base fabric for papermaking felt and papermaking felt made by joining same |
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| JP2003239194A (en) | 2002-02-15 | 2003-08-27 | Nippon Felt Co Ltd | Open end felt with seam |
| JP4193931B2 (en) | 2003-01-30 | 2008-12-10 | イチカワ株式会社 | Felt for papermaking |
| US7135093B2 (en) | 2003-03-20 | 2006-11-14 | Weavexx Corporation | Pin seamed papermaker's press felt with cross machine direction yarns woven in Dreher weave at seam loops |
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