JP6025327B2 - Method for manufacturing absorbent article - Google Patents

Method for manufacturing absorbent article Download PDF

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JP6025327B2
JP6025327B2 JP2011282726A JP2011282726A JP6025327B2 JP 6025327 B2 JP6025327 B2 JP 6025327B2 JP 2011282726 A JP2011282726 A JP 2011282726A JP 2011282726 A JP2011282726 A JP 2011282726A JP 6025327 B2 JP6025327 B2 JP 6025327B2
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雄一 石野
雄一 石野
晃央 森田
晃央 森田
賢治 安藤
賢治 安藤
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Description

本発明は、生理用ナプキンや失禁パッド、おむつ等の吸収性物品の製造方法に関する。   The present invention relates to a method for producing absorbent articles such as sanitary napkins, incontinence pads, and diapers.

伸縮部材を有する吸収性物品の製造方法において、シートに伸長状態の弾性部材が固定されてなる該伸縮部材に対し、一対の歯溝ロールで延伸加工を施して、高伸長性を有する伸縮ギャザー部材を得る技術が知られている。例えば、特許文献１には、おむつを製造する方法として、シートに、伸長状態の弾性部材をホットメルト接着剤によって接合して、複合シートを得、該複合シートを該弾性部材の伸縮方向に伸長させた状態で、該複合シートにおける該弾性部材が配置された部分を、互いに噛み合う歯溝を有する一対の歯溝ロール間に噛み込ませて、該部分に対し、弾性部材の伸縮方向に延伸加工を施す技術が記載されている。この技術によれば、脚回りやウエスト周りの周縁開口部に設けられる伸縮ギャザー部材を、弾性部材の伸縮方向に引っ張った時の伸び量が大きく、また小さな力で伸びやすい高伸長性を有するものにできる。   In a method for manufacturing an absorbent article having a stretchable member, a stretchable gather member having high stretchability by stretching a stretchable member having a stretched elastic member fixed to a sheet with a pair of tooth groove rolls. Techniques for obtaining are known. For example, in Patent Document 1, as a method of manufacturing a diaper, a stretched elastic member is joined to a sheet with a hot melt adhesive to obtain a composite sheet, and the composite sheet is stretched in the direction of expansion and contraction of the elastic member. In this state, the portion of the composite sheet where the elastic member is disposed is engaged between a pair of tooth groove rolls having tooth grooves engaged with each other, and the elastic member is stretched in the expansion and contraction direction with respect to the portion. The technology to apply is described. According to this technology, the stretchable gather member provided at the peripheral opening around the legs and the waist has a large stretch when stretched in the stretch direction of the elastic member, and has high stretchability that is easy to stretch with a small force Can be.

一方、伸縮部材の延伸加工に関するものではないが、特許文献２には、ホットメルト型接着剤を介して表面シートと吸収体とを接合してなる積層体を、溝形成用の凸部を有するエンボスロールとそれに対向配置されたバックアップロールとの間に挿通して前記溝を形成する溝形成工程を具備し、前記溝形成工程においては、エンボスロールを加熱すると共に、バックアップロールを７０℃以上に加熱した状態において、これら両ロールによる溝形成を行う吸収性物品の製造方法が記載されている。特許文献２には、ロールを加熱することによってロール加圧時に吸収体側から滲み出すホットメルト接着剤のロールへの巻き付きを防止できると記載されている。   On the other hand, although not related to the stretching process of the elastic member, Patent Document 2 has a laminate formed by joining a top sheet and an absorbent body via a hot-melt adhesive and has a convex part for forming a groove. A groove forming step of forming the groove by passing between an embossing roll and a backup roll disposed opposite thereto is provided. In the groove forming step, the embossing roll is heated and the backup roll is heated to 70 ° C. or higher. The manufacturing method of the absorbent article which performs groove formation by these both rolls in the heated state is described. Patent Document 2 describes that by heating the roll, it is possible to prevent the hot melt adhesive that oozes from the absorber side when the roll is pressed from being wound around the roll.

特開２０１０−１４８５３７号公報JP 2010-148537 A 特開２００５−２１８６４８号公報JP 2005-218648 A

特許文献１の技術においては、複合シートにおける該弾性部材が配置された部分に歯溝ロールで延伸加工を施す際に、歯溝ロールに噛まれた部分からホットメルト接着剤が滲み出す場合がある。滲み出たホットメルト接着剤は常温であると接着力が強いので歯溝ロールの歯に付着しやすく、付着したホットメルト接着剤によって歯の高さや幅が変化することがある。   In the technique of Patent Document 1, when the portion of the composite sheet where the elastic member is disposed is stretched with a tooth groove roll, the hot melt adhesive may ooze out from the portion bitten by the tooth groove roll. . The exuded hot melt adhesive has a strong adhesive force at room temperature, so that it easily adheres to the teeth of the tooth gap roll, and the height and width of the tooth may change depending on the hot melt adhesive that has adhered.

したがって、本発明の課題は、ホットメルト接着剤の歯への付着を防止して、伸縮ギャザー部材を有する吸収性物品を安定的に連続生産できるととともに、シートからの弾性部材の剥がれ防止が可能な吸収性物品の製造方法及び製造装置を提供することにある。   Therefore, the problem of the present invention is that the hot melt adhesive can be prevented from adhering to the teeth, and the absorbent article having the elastic gather member can be stably and continuously produced, and the elastic member can be prevented from peeling off from the sheet. An object of the present invention is to provide a manufacturing method and a manufacturing apparatus for an absorbent article.

前記の課題を解決すべく本発明者らは鋭意検討した結果、弾性部材連続体をシートに接合した後の延伸加工を、該弾性部材の連続した状態を保ったまま行うと、意外にも、弾性部材がシートから剥がれてしまう不都合が起こりにくくなることを知見した。   As a result of diligent study to solve the above problems, the present inventors surprisingly performed the stretching process after joining the elastic member continuous body to the sheet while maintaining the continuous state of the elastic member. It has been found that the disadvantage that the elastic member is peeled off from the sheet is less likely to occur.

本発明は前記知見に基づきなされたものであり、液保持性の吸収体及び該吸収体の肌当接面側に配置された表面シートを具備する実質的に縦長の吸収性本体と、該吸収性本体の長手方向に沿う両側部それぞれに、長手方向に延びるように配置されて、長手方向に伸縮性を有する伸縮ギャザー部材とを備えた吸収性物品の製造方法であって、
一方向に延びる弾性部材の連続体を、その伸長状態下に、帯状シートの連続体に、ホットメルト接着剤によって接合して、一方向に延びる伸縮部材の連続体を得、
該伸縮部材の連続体を該弾性部材の伸縮方向に伸長させた状態で、該伸縮部材の連続体における該弾性部材の連続体が配置された部分を、互いに噛み合う歯溝を有する一対の歯溝ロール間に噛み込ませて、該部分に対し、前記弾性部材の伸縮方向に延伸加工を施した伸縮ギャザー部材の連続体を得、
前記伸縮ギャザー部材の連続体を所定長さに切断する工程を有し、
前記延伸加工を、前記歯溝ロールを加熱した状態で行う、吸収性物品の製造方法を提供することによって前記の課題を解決したものである。 The present invention has been made on the basis of the above knowledge, and comprises a substantially vertically long absorbent main body comprising a liquid-retaining absorbent body and a surface sheet disposed on the skin contact surface side of the absorbent body, and the absorbent body. Each of the both sides along the longitudinal direction of the adhesive main body is a method for producing an absorbent article provided with an elastic gather member that is arranged to extend in the longitudinal direction and has elasticity in the longitudinal direction,
A continuous body of elastic members extending in one direction is joined to a continuous body of belt-like sheets under a stretched state by a hot melt adhesive to obtain a continuous body of elastic members extending in one direction,
A pair of tooth gaps having tooth grooves that mesh with each other at a portion of the continuous body of the elastic member in which the continuous body of the elastic member is disposed in a state in which the continuous body of the elastic member is extended in the expansion and contraction direction of the elastic member. Obtain a continuous body of stretchable gather members that are bitten between rolls and stretched in the stretch direction of the elastic member with respect to the portion,
Cutting the continuous body of the stretchable gather members into a predetermined length;
The said subject is solved by providing the manufacturing method of the absorbent article which performs the said extending | stretching process in the state which heated the said tooth gap roll.

また本発明は、液保持性の吸収体及び該吸収体の肌当接面側に配置された表面シートを具備する実質的に縦長の吸収性本体と、該吸収性本体の長手方向に沿う両側部それぞれに、該方向に延びるように配置されて該方向に伸縮性を有する伸縮ギャザー部材と、を備える吸収性物品の製造装置であって、
帯状シートの連続体を搬送経路に沿って搬送する搬送手段と、
弾性部材の連続体を供給する供給手段と、
該帯状シートの連続体及び該弾性部材の連続体のそれぞれにホットメルト接着剤を塗工する塗工手段と、
該帯状シートの連続体を伸長状態の該弾性部材の連続体に合流させ、それにより帯状シートの連続体に弾性部材の連続体を伸長状態で接合させて、伸縮部材の連続体を得る伸縮部材形成手段と、
互いに噛み合う歯溝を有し、前記伸縮部材の連続体における前記弾性部材の連続体が配置された部分を噛み込んで、該部分に対し、該弾性部材の伸縮方向に延伸加工を施して、伸縮ギャザー部材の連続体を形成する、一対の歯溝ロールと、
該一対の歯溝ロール間に、前記伸縮部材の連続体を、前記弾性部材の伸縮方向に伸長させつつ供給する伸長供給手段と、を有し、
前記歯溝ロールは加熱制御手段を備えている、吸収性物品の製造装置を提供するものである。 The present invention also provides a substantially vertically long absorbent main body comprising a liquid retaining absorbent and a surface sheet disposed on the skin contact surface side of the absorbent, and both sides along the longitudinal direction of the absorbent main body. A stretchable gathering member that is disposed so as to extend in the direction to each part and has stretchability in the direction, and an absorbent article manufacturing apparatus comprising:
Conveying means for conveying a continuous body of belt-shaped sheets along a conveying path;
Supply means for supplying a continuous body of elastic members;
A coating means for applying a hot melt adhesive to each of the continuous body of the belt-like sheet and the continuous body of the elastic member;
A stretchable member that joins the continuous body of the belt-like sheet to the continuous body of the stretched elastic member, and thereby joins the continuous body of the beltlike sheet in a stretched state to the continuous body of the stretchable member to obtain a continuous body of stretchable members. Forming means;
It has tooth spaces that mesh with each other, bites a portion of the continuum of elastic members where the continuum of elastic members is arranged, and stretches the portions in the direction of expansion and contraction of the elastic members to expand and contract A pair of tooth space rolls forming a continuous body of gather members;
An extension supply means for supplying the continuous member of the elastic member while extending the elastic member in the elastic direction between the pair of tooth space rolls;
The tooth gap roll provides an absorbent article manufacturing apparatus provided with heating control means.

更に、本発明は、所定の方向に伸縮性を有する伸縮ギャザー部材の製造方法であって、
一方向に延びる弾性部材の連続体を、その伸長状態下に、帯状シートの連続体に、ホットメルト接着剤によって接合して、一方向に延びる伸縮部材の連続体を得、
該伸縮部材の連続体を該弾性部材の伸縮方向に伸長させた状態で、該伸縮部材の連続体における該弾性部材の連続体が配置された部分を、互いに噛み合う歯溝を有する一対の歯溝ロール間に噛み込ませて、該部分に対し、前記弾性部材の伸縮方向に延伸加工を施して、伸縮ギャザー部材の連続体を得、
前記伸縮ギャザー部材の連続体を所定長さに切断する工程を有し、
前記延伸加工を、前記歯溝ロールを加熱した状態で行う、伸縮ギャザー部材の製造方法を提供するものである。 Furthermore, this invention is a manufacturing method of the expansion-contraction gathering member which has a stretching property in a predetermined | prescribed direction,
A continuous body of elastic members extending in one direction is joined to a continuous body of belt-like sheets under a stretched state by a hot melt adhesive to obtain a continuous body of elastic members extending in one direction,
A pair of tooth gaps having tooth grooves that mesh with each other at a portion of the continuous body of the elastic member in which the continuous body of the elastic member is disposed in a state in which the continuous body of the elastic member is extended in the expansion and contraction direction of the elastic member. It is bitten between rolls, and the part is stretched in the expansion / contraction direction of the elastic member to obtain a continuous body of expansion / contraction gather members.
Cutting the continuous body of the stretchable gather members into a predetermined length;
It provides the manufacturing method of an expansion-contraction gather member which performs the said extending | stretching process in the state which heated the said tooth gap roll.

本発明によれば、ホットメルト接着剤の歯への付着を防止して、伸縮ギャザー部材を有する吸収性物品を、安定的に連続生産できると共に、シートからの弾性部材の剥がれ防止が可能な吸収性物品の製造方法及び製造装置が提供される。   ADVANTAGE OF THE INVENTION According to this invention, the absorption which can prevent the adhesion of a hot melt adhesive to a tooth | gear, can manufacture the absorbent article which has an expansion-contraction gather member stably continuously, and can prevent peeling of the elastic member from a sheet | seat. A method and apparatus for manufacturing a functional article are provided.

図１は、本発明の製造方法によって製造される吸収性物品の一例である生理用ナプキンの肌当接面側を模式的に示す平面図である。FIG. 1 is a plan view schematically showing a skin contact surface side of a sanitary napkin which is an example of an absorbent article manufactured by the manufacturing method of the present invention. 図２は、図１のＩ−Ｉ線断面を模式的に示す断面図である。FIG. 2 is a cross-sectional view schematically showing a cross section taken along line II of FIG. 図３は、図１に示す生理用ナプキンにおける伸縮ギャザー部材の一部を模式的に示す斜視図である。FIG. 3 is a perspective view schematically showing a part of the extendable gather member in the sanitary napkin shown in FIG. 1. 図４は、本発明の製造方法の第１実施態様に用いられる吸収性物品の製造装置の概略図である。FIG. 4 is a schematic view of an absorbent article manufacturing apparatus used in the first embodiment of the manufacturing method of the present invention. 図５は、伸縮部材の連続体に施す延伸加工の一例を模式的に示す斜視図である。FIG. 5 is a perspective view schematically showing an example of a stretching process performed on a continuous body of elastic members. 図６は、伸縮部材の連続体に延伸加工を施す様子を示す模式図である。FIG. 6 is a schematic view showing a state in which a stretching process is performed on a continuous body of elastic members. 図７（ａ）、図７（ｂ）及び図７（ｃ）は、伸縮ギャザー部材の製造方法の手順を模式的に示す図である。FIG. 7A, FIG. 7B, and FIG. 7C are diagrams schematically showing a procedure of a method for manufacturing an expandable gather member. 図８は、本発明の製造方法の第２実施態様に用いられる吸収性物品の製造装置を模式的に示す図である。FIG. 8 is a diagram schematically showing an absorbent article manufacturing apparatus used in the second embodiment of the manufacturing method of the present invention. 図９は、本発明の製造方法により製造される吸収性物品の他の例である生理用ナプキンの図２相当図である。FIG. 9 is a view corresponding to FIG. 2 of a sanitary napkin which is another example of the absorbent article manufactured by the manufacturing method of the present invention. 図１０は、本発明の製造方法の第３実施態様に用いられる吸収性物品の製造装置を模式的に示す図である。FIG. 10 is a diagram schematically showing an absorbent article manufacturing apparatus used in the third embodiment of the manufacturing method of the present invention. 図１１（ａ）、図１１（ｂ）及び図１１（ｃ）は、伸縮ギャザー部材の製造方法の他の手順を模式的に示す図である。FIG. 11A, FIG. 11B, and FIG. 11C are diagrams schematically illustrating another procedure of the method for manufacturing the stretchable gather member. 図１２は、本発明の実施例における、延伸率を求める方法を示す説明図である。FIG. 12 is an explanatory diagram showing a method for obtaining the stretching ratio in the example of the present invention. 図１３は、伸縮ギャザー部材の製造における運転時間と該部材の延伸率との関係を示すグラフである。FIG. 13 is a graph showing the relationship between the operation time in the production of the stretchable gather member and the stretch ratio of the member.

以下、本発明を、その好ましい実施態様に基づき図面を参照しながら説明する。本発明の方法は、伸縮ギャザーを有する吸収性物品の製造に関するものである。本発明の適用の対象となる吸収性物品としては、生理用ナプキン、おむつ、パンティライナ、失禁パッド等が挙げられる。また前記伸縮ギャザー部材としては、例えば、脚周りギャザーや起立機能及び防漏機能を有する防漏壁等が挙げられる。   Hereinafter, the present invention will be described based on preferred embodiments with reference to the drawings. The method of the present invention relates to the production of absorbent articles having stretchable gathers. Examples of absorbent articles to which the present invention is applied include sanitary napkins, diapers, panty liners, incontinence pads, and the like. Examples of the stretchable gather member include gathers around the legs, a leak-proof wall having a standing function and a leak-proof function, and the like.

図１ないし図３に、本発明の適用対象となる吸収性物品の一例としての生理用ナプキン１Ａを示す。ナプキン１Ａは、図１に示すように、着用時に着用者の***部（膣口）に対向配置される***部対向部Ａと、着用時に***部対向部Ａより着用者の背中側に配される後方部Ｂとを有している。また、ナプキン１Ａは、該ナプキン１Ａを下着又は吸収性物品支持具に固定するための粘着部（図示せず）を非肌当接面に有している。   1 to 3 show a sanitary napkin 1A as an example of an absorbent article to which the present invention is applied. As shown in FIG. 1, the napkin 1 </ b> A is disposed on the back side of the wearer from the excretory part facing part A disposed opposite to the excretion part (vaginal opening) of the wearer when worn and the excretion part facing part A when worn And a rear part B. Further, the napkin 1A has an adhesive part (not shown) for fixing the napkin 1A to an undergarment or an absorbent article support on the non-skin contact surface.

ナプキン１Ａは、図１及び図２に示すように、液保持性の吸収体４及び該吸収体４の肌当接面側に配置された表面シート２を具備する実質的に縦長の吸収性本体１０のほか、該吸収性本体１０の長手方向に沿う両側部それぞれに配置され、該方向に延びるように配置されて該方向に伸縮性を有する伸縮ギャザー部材としての一対の防漏壁５Ａ，５Ａと、吸収体４の非肌当接面側に配置された裏面シート３とを備えている。   As shown in FIGS. 1 and 2, the napkin 1 </ b> A is a substantially vertically long absorbent main body including a liquid retaining absorbent body 4 and a surface sheet 2 disposed on the skin contact surface side of the absorbent body 4. 10, a pair of leak-proof walls 5A, 5A as elastic gather members that are arranged on both sides along the longitudinal direction of the absorbent main body 10 and extend in this direction and have elasticity in this direction. And the back surface sheet 3 arrange | positioned at the non-skin contact surface side of the absorber 4 is provided.

表面シート２はナプキン１Ａの肌当接面を形成し、ナプキンの幅方向Ｙにおいて吸収体４の長手方向Ｘに沿う両側部間の領域内に収まっている。一方、ナプキン１Ａの非肌当接面を形成する裏面シート３は、図２に示すように、吸収体４の非肌当接面の全域を被覆し、更に吸収体４の長手方向Ｘに沿う両側縁からの外方に延出してサイドフラップ部６を形成している。サイドフラップ部６は、図１に示すように、一対のウイング部７，７を***部対向部Ａに、一対の後部フラップ部８，８を後方部Ｂに有している。   The top sheet 2 forms a skin contact surface of the napkin 1A, and is within a region between both side portions along the longitudinal direction X of the absorbent body 4 in the width direction Y of the napkin. On the other hand, the back sheet 3 forming the non-skin contact surface of the napkin 1A covers the whole area of the non-skin contact surface of the absorbent body 4 and further extends along the longitudinal direction X of the absorbent body 4 as shown in FIG. Side flap portions 6 are formed extending outward from both side edges. As shown in FIG. 1, the side flap portion 6 has a pair of wing portions 7 and 7 in the excretory portion facing portion A and a pair of rear flap portions 8 and 8 in the rear portion B.

図１及び図２に示すように、吸収体４は、平面視において角が丸みを帯びた略矩形形状の下層吸収体４０と、該下層吸収体４０よりも幅狭でかつ該下層吸収体４０の幅方向Ｙの中央部の肌当接面側に***する上層吸収体４１とを具備している。ナプキン１Ａの肌当接面には、表面シート２及び吸収体４が裏面シート３に向かって一体的に凹陥した、線状の溝部９が形成されている。溝部９は、長手方向Ｘに延びる連続した環状の外側の溝部９Ａと、その内側に位置する略円弧状の溝部９Ｂ、９Ｃ、９Ｄとからなる。内側の溝部９Ｂ、９Ｃ、９Ｄは、ナプキン１Ａの幅方向に延びている。溝部９Ｂ、９Ｃ、９Ｄはナプキン１Ａの前方から後方に、この順で位置している。溝部９Ｂは、ナプキン１Ａの前方側に向けて凸状に湾曲している。溝部９Ｃ、９Ｄは、ナプキン１Ａの後方側に向けて凸状に湾曲している。各溝部９Ｂ、９Ｃ、９Ｄにおける左右の端部は、外側の溝部９Ａと連結しているか、又は外側の溝部９Ａから所定の距離だけ隔てた位置にある。溝部９Ｂ、９Ｃ、９Ｄの頂点の位置は、ナプキン１Ａの縦中心線（図示せず）上に位置している。   As shown in FIGS. 1 and 2, the absorber 4 includes a lower-layer absorber 40 having a substantially rectangular shape with rounded corners in plan view, a narrower width than the lower-layer absorber 40, and the lower-layer absorber 40. The upper layer absorber 41 which protrudes to the skin contact surface side of the central part in the width direction Y of the upper layer is provided. On the skin contact surface of the napkin 1 </ b> A, a linear groove portion 9 is formed in which the top sheet 2 and the absorber 4 are integrally recessed toward the back sheet 3. The groove portion 9 includes a continuous annular outer groove portion 9A extending in the longitudinal direction X, and substantially arc-shaped groove portions 9B, 9C, and 9D positioned inside the groove portion 9A. The inner grooves 9B, 9C, 9D extend in the width direction of the napkin 1A. The grooves 9B, 9C, 9D are located in this order from the front to the rear of the napkin 1A. The groove 9B is curved in a convex shape toward the front side of the napkin 1A. The grooves 9C and 9D are curved in a convex shape toward the rear side of the napkin 1A. The left and right ends of each of the grooves 9B, 9C, 9D are connected to the outer groove 9A or are separated from the outer groove 9A by a predetermined distance. The positions of the vertices of the grooves 9B, 9C, 9D are located on the vertical center line (not shown) of the napkin 1A.

上層吸収体４１は長手方向Ｘに延びるように、溝部９Ｂと溝部９Ｃとの間に存在しているとともに、溝部９Ｃと溝部９Ｄとの間の２箇所に存在している。   The upper layer absorbent body 41 exists between the groove 9B and the groove 9C and extends at two places between the groove 9C and the groove 9D so as to extend in the longitudinal direction X.

防漏壁５Ａは、図２に示すように、幅方向Ｙに一定の幅を有する一枚の帯状シート（防漏壁形成用シート）５０と、該帯状シート５０に伸長状態で配置された弾性部材１５とを含んで構成され、基壁部５１と、該基壁部５１の上端部に連設されかつ弾性部材１５が伸長状態で配置固定された弾性部材配置部５３とを有している。防漏壁５Ａにおいて、相対向する帯状シート５０，５０間及び弾性部材１５と帯状シート５０との間はそれぞれ接合されている。防漏壁形成用シートとは、防漏壁の形成に用いられ撥水性を有するシートをいう。   As shown in FIG. 2, the leak-proof wall 5 </ b> A includes a single strip-shaped sheet (sheet for leak-proof wall formation) 50 having a certain width in the width direction Y, and an elastic member disposed in an extended state on the strip-shaped sheet 50. And includes a base wall portion 51 and an elastic member placement portion 53 that is connected to the upper end portion of the base wall portion 51 and in which the elastic member 15 is placed and fixed in an extended state. . In the leak-proof wall 5A, the band-shaped sheets 50 and 50 facing each other and the elastic member 15 and the band-shaped sheet 50 are joined to each other. The sheet for forming a leak-proof wall refers to a sheet having water repellency used for forming a leak-proof wall.

基壁部５１は、吸収体４の上方にて表面シート２の肌当接面２ａに接合されており、その接合部１３を起点として着用時に着用者の肌側に向かって起立する起立部５２を有している。基壁部５１における起立部５２以外の部分は、吸収体４の長手方向Ｘに沿う側部に沿って巻き下げられ、更にその一部が該側部から幅方向Ｙの外方に延出して裏面シート３と重ね合わされ接合されている。また、基壁部５１（起立部５２）と表面シート２との接合部１３は、平面視において線状であり、長手方向Ｘに沿って防漏壁５Ａ（吸収性本体１０）の略全長に亘って延びている。   The base wall part 51 is joined to the skin contact surface 2a of the topsheet 2 above the absorbent body 4, and an upright part 52 that stands up toward the wearer's skin when wearing the joint part 13 as a starting point. have. A portion of the base wall portion 51 other than the standing portion 52 is wound down along the side portion along the longitudinal direction X of the absorber 4, and a part of the portion extends outward in the width direction Y from the side portion. The back sheet 3 is overlapped and joined. Moreover, the joint part 13 of the base wall part 51 (standing part 52) and the surface sheet 2 is linear in a plan view, and extends substantially along the longitudinal direction X to the leakage prevention wall 5A (absorbent body 10). It extends over.

弾性部材配置部５３は、図１に示すように、吸収性本体１０の長手方向Ｘの略全長に亘って延びている。弾性部材配置部５３には、長手方向Ｘに延びる複数本の弾性部材１５が伸長状態で帯状シート５０に接合固定されていることによって、弾性伸縮性が付与されており、その伸縮方向は長手方向Ｘに一致している。複数本の弾性部材１５は、それぞれ、吸収性本体１０の長手方向Ｘの略全長に亘って配されている。弾性部材配置部５３は、長手方向Ｘに延びる複数本の弾性部材１５が幅方向Ｙに所定間隔を置いて配置されていることによって、図１〜図３に示すように面状に形成されている。   The elastic member arrangement | positioning part 53 is extended over the substantially full length of the longitudinal direction X of the absorptive main body 10, as shown in FIG. A plurality of elastic members 15 extending in the longitudinal direction X are bonded and fixed to the belt-like sheet 50 in the stretched state in the elastic member arranging portion 53, and elastic elasticity is imparted. Matches X. Each of the plurality of elastic members 15 is disposed over substantially the entire length in the longitudinal direction X of the absorbent main body 10. The elastic member arrangement portion 53 is formed in a planar shape as shown in FIGS. 1 to 3 by arranging a plurality of elastic members 15 extending in the longitudinal direction X at predetermined intervals in the width direction Y. Yes.

弾性部材配置部５３は、図２及び図３に示すように、起立部５２（基壁部５１）の上端部から幅方向Ｙの外方に張り出しており、起立部５２と合わせて、図２に示す如き幅方向Ｙに沿う断面視において、略逆Ｌ字状を形成するように起立する。一対の防漏壁５Ａ，５Ａそれぞれにおいて、弾性部材１５は、弾性部材配置部５３を構成する、折り曲げられて相対向している２枚の帯状シート５０，５０の間に伸長状態で配置されており、図示しない接着剤によってこれら２枚の帯状シート５０，５０に接合されている。なお、片側の防漏壁５Ａは１枚の帯状シート５０を用いており、図２のように２層に折り曲げることで、弾性部材１５は該２層の帯状シート５０，５０の間となる。防漏壁５Ａの形態は、これに制限されず、１枚の帯状シート５０を折り曲げる代わりに２枚の帯状シートを用いて、その間に弾性部材１５を接合してもよい。   As shown in FIGS. 2 and 3, the elastic member placement portion 53 protrudes outward in the width direction Y from the upper end portion of the standing portion 52 (base wall portion 51), and together with the standing portion 52, FIG. In a cross-sectional view along the width direction Y as shown in FIG. In each of the pair of leak-proof walls 5A and 5A, the elastic member 15 is disposed in an expanded state between the two belt-like sheets 50 and 50 that are bent and face each other, constituting the elastic member disposing portion 53. The two belt-like sheets 50 and 50 are joined by an adhesive (not shown). The leak-proof wall 5A on one side uses a single belt-like sheet 50, and the elastic member 15 is located between the two belt-like sheets 50, 50 by being folded into two layers as shown in FIG. The form of the leak-proof wall 5A is not limited to this, and instead of bending one belt-like sheet 50, two belt-like sheets may be used and the elastic member 15 may be joined therebetween.

図１に示すように、防漏壁５Ａの長手方向Ｘの前端部及び後端部には、それぞれ、弾性部材配置部５３が吸収性本体１０に固定されて、端部固定部５４（前端部固定部５４ａ，後端部固定部５４ｂ）が形成されている。   As shown in FIG. 1, the elastic member placement portion 53 is fixed to the absorbent main body 10 at the front end portion and the rear end portion in the longitudinal direction X of the leak-proof wall 5A, respectively, and the end fixing portion 54 (front end portion) A fixing portion 54a and a rear end fixing portion 54b) are formed.

防漏壁５Ａは、伸長状態で配置された部分（弾性部材配置部５３）を構成する帯状シート５０が、該弾性部材１５の伸縮方向（長手方向Ｘ）に延伸加工されている。これにより、弾性部材配置部５３には、図３に示すように、弾性部材配置部５３の上面５３ａを構成する帯状シート５０が上方（着用者の肌側）に向けて凸状に***してなる畝状の襞２０が多数形成されていると共に、弾性部材配置部５３の下面５３ｂを構成する帯状シート５０が下方（着用者の肌側とは反対側）に向けて凸状に***してなる畝状の襞２１が多数形成されている。弾性部材配置部５３における多数の襞２０，２１は、それぞれ、弾性部材１５の伸縮方向（長手方向Ｘ）と直交する幅方向Ｙに延び、個々の襞２０，２１が吸収性本体１０の長手方向Ｘに沿って規則正しく列をなすように多数形成されたギャザーとなっている。   In the leak-proof wall 5 </ b> A, a belt-like sheet 50 constituting a portion (elastic member placement portion 53) placed in an extended state is stretched in the expansion / contraction direction (longitudinal direction X) of the elastic member 15. Thereby, as shown in FIG. 3, the belt-like sheet 50 constituting the upper surface 53 a of the elastic member arrangement portion 53 bulges upward in the elastic member arrangement portion 53 toward the upper side (the skin side of the wearer). A large number of ridge-like ridges 20 are formed, and the belt-like sheet 50 constituting the lower surface 53b of the elastic member arrangement portion 53 protrudes in a convex shape downward (opposite to the wearer's skin side). A large number of ridge-like ridges 21 are formed. The large number of ridges 20, 21 in the elastic member arrangement portion 53 extend in the width direction Y orthogonal to the expansion / contraction direction (longitudinal direction X) of the elastic member 15, and the individual ridges 20, 21 are in the longitudinal direction of the absorbent main body 10. Many gathers are formed so as to form a regular line along X.

次に、前述した生理用ナプキン１Ａの製造方法を例にとり、本発明の吸収性物品の製造方法の第１実施態様について図面を参照して説明する。   Next, the first embodiment of the method for manufacturing an absorbent article according to the present invention will be described with reference to the drawings, taking the method for manufacturing the sanitary napkin 1A described above as an example.

第１実施態様の生理用ナプキン１Ａの製造方法は、一方向に延びる弾性部材連続体１５’を、その伸長状態下に、帯状シート連続体５０’に、ホットメルト接着剤によって接合して、一方向に延びる伸縮部材連続体５ａ’を得、該伸縮部材連続体５ａ’を該弾性部材の伸縮方向に伸長させた状態で、該伸縮部材連続体５ａ’における該弾性部材連続体１５’が配置された部分を、互いに噛み合う歯溝を有する一対の歯溝ロール８０，８１間に噛み込ませて、該部分に対し、弾性部材の伸縮方向に延伸加工を施して伸縮ギャザー部材連続体５Ａ’を得、該伸縮ギャザー部材連続体５Ａ’を所定長さに切断する工程を有する。   In the manufacturing method of the sanitary napkin 1A of the first embodiment, the elastic member continuum 15 ′ extending in one direction is joined to the belt-like sheet continuum 50 ′ with a hot melt adhesive under the stretched state. The elastic member continuous body 5a ′ extending in the direction is obtained, and the elastic member continuous body 15 ′ in the elastic member continuous body 5a ′ is disposed in a state where the elastic member continuous body 5a ′ is extended in the elastic direction of the elastic member. The portion thus formed is engaged between a pair of tooth groove rolls 80 and 81 having tooth grooves that mesh with each other, and the stretch member is stretched in the expansion and contraction direction of the elastic member to form a stretchable gather member continuous body 5A ′. And obtaining a step of cutting the stretchable gather member continuous body 5A ′ to a predetermined length.

図４には生理用ナプキン１Ａの製造装置の一実施形態が示されている。製造装置６０Ａは、図４に示すように、長尺状の帯状シート連続体５０’の搬送手段（図示せず）、弾性部材連続体１５’の供給手段（図示せず）及び接着剤の塗工手段６１，６２を備えている。また製造装置６０Ａは、伸縮部材連続体形成手段として、帯状シート連続体５０’に弾性部材連続体１５’を合流させる合流ロール６５、ガイド部材（図示せず）及び帯状シート連続体５０’の折り曲げ手段７１等を備えている。これらに加えて、製造装置６０Ａは、帯状シート連続体５０’の折り曲げ手段７２、延伸加工手段としての歯溝ロール（挟持体）８０，８１、切断手段としてのカットロール９１及びアンビルロール９２をも備えている。   FIG. 4 shows an embodiment of a manufacturing apparatus for the sanitary napkin 1A. As shown in FIG. 4, the manufacturing apparatus 60A includes a conveying means (not shown) for the elongated belt-like sheet continuous body 50 ′, a supplying means (not shown) for the elastic member continuous body 15 ′, and an adhesive coating. Engineering means 61 and 62 are provided. The manufacturing apparatus 60A also serves as a stretchable member continuum forming means for bending the joining roll 65, the guide member (not shown), and the strip-like sheet continuum 50 ′ for joining the elastic member continuum 15 ′ to the strip-like sheet continuum 50 ′. Means 71 and the like are provided. In addition to these, the manufacturing apparatus 60A includes a folding means 72 for the belt-like sheet continuous body 50 ′, tooth gap rolls (clamping bodies) 80 and 81 as stretching means, a cut roll 91 and an anvil roll 92 as cutting means. I have.

折り曲げ手段７１，７２（及び後述する折り曲げ手段７３，７４，７５）としては、この種のシートの折り曲げ加工に使用可能な公知の装置を適宜用いることができる（例えば本出願人の先の出願に係る特開２００３−３３３９１号公報、特開２００４−１８０７８７等参照）。折り曲げ手段の一例として、折り曲げ対象である帯状シート連続体５０’の搬送経路の幅を規定するガイド部材、帯状シート連続体５０’を負圧吸着させる吸引手段等を含んで構成され、該ガイド部材が、帯状シート連続体５０’の搬送経路が搬送方向（ＭＤ）の下流側に向かって漸次狭まるように設けられているものが挙げられる。斯かる構成の折り曲げ手段を用い、ガイド部材を備えた搬送経路で帯状シート連続体５０’を搬送することにより、帯状シート連続体５０’における、ガイド部材で規定された搬送経路から幅方向（ＣＤ）の外方にはみ出した部分を、ＣＤの内方側に折り曲げることができる。   As the folding means 71, 72 (and the folding means 73, 74, 75 described later), a known apparatus that can be used for folding this type of sheet can be used as appropriate (for example, in the earlier application of the present applicant). (See JP-A-2003-33391, JP-A-2004-180787, etc.). As an example of the bending means, the guide member is configured to include a guide member that defines the width of the conveyance path of the belt-like sheet continuous body 50 ′ to be bent, a suction means that sucks the belt-like sheet continuous body 50 ′ under negative pressure, and the like. However, what is provided so that the conveyance path | route of strip | belt-shaped sheet | seat continuous body 50 'may become narrow gradually toward the downstream of a conveyance direction (MD) is mentioned. By using the bending means having such a configuration, the belt-like sheet continuous body 50 ′ is conveyed along the conveyance path provided with the guide member, so that the band-shaped sheet continuous body 50 ′ has a width direction (CD) from the conveyance path defined by the guide member. ) Can be bent to the inside of the CD.

一対の歯溝ロール８０，８１は、それぞれの周面部に、ロール軸線方向（ＣＤ）に延びかつ互いに噛み合う歯溝を有している。より具体的には、一対の歯溝ロール８０，８１の周面部の全域には、図５に示すように、前記歯溝が形成された高延伸部８２が形成されている。互いに噛み合わされた両ロール８０，８１の高延伸部８２，８２間では、被延伸加工物（伸縮ギャザー部材連続体５Ａ’）はＭＤに延伸加工が施される。   The pair of tooth groove rolls 80 and 81 has tooth grooves extending in the roll axis direction (CD) and meshing with each other on the peripheral surface portions. More specifically, as shown in FIG. 5, a highly elongated portion 82 in which the tooth grooves are formed is formed in the entire peripheral surface portion of the pair of tooth groove rolls 80 and 81. Between the high stretched portions 82 and 82 of both rolls 80 and 81 meshed with each other, the stretched workpiece (the stretchable gather member continuous body 5A ′) is stretched in the MD.

高延伸部８２には、図６に示すように、所定の高さＨを有する歯８２ａが形成されており、一対の歯溝ロール８０，８１それぞれの高延伸部８２どうしを互いに噛み合わせたときに、両ロールの歯溝が所定の噛み合い深さＤで噛み合うようになされている。   As shown in FIG. 6, teeth 82 a having a predetermined height H are formed in the high extension portion 82, and when the high extension portions 82 of the pair of tooth gap rolls 80 and 81 are engaged with each other. Further, the tooth gaps of both rolls are engaged with each other at a predetermined engagement depth D.

一対の歯溝ロール８０，８１それぞれの高延伸部８２どうしの噛み合い深さＤ（図６参照）は、被延伸加工物の延伸率を高め、該被延伸加工物に良好な伸長性を与えるために、被延伸加工物の材料にもよるが０．５ｍｍ以上が好ましく、０．５〜１０ｍｍが特に好ましい。一対の歯溝ロール８０，８１の噛み合い深さＤは、図６に示すように、歯溝ロール８０，８１どうしを噛み合わせて回転させるとき、隣接する歯８２ａ，８２ａが重なり合う長さである。   The meshing depth D (see FIG. 6) between the high-stretched portions 82 of each of the pair of tooth gap rolls 80 and 81 increases the stretch ratio of the stretched workpiece, and gives good stretchability to the stretched workpiece. Further, although it depends on the material of the stretched workpiece, it is preferably 0.5 mm or more, particularly preferably 0.5 to 10 mm. As shown in FIG. 6, the engagement depth D of the pair of tooth groove rolls 80, 81 is a length in which adjacent teeth 82 a, 82 a overlap when the tooth groove rolls 80, 81 are engaged with each other and rotated.

また、歯溝ロール８０，８１の高延伸部８２は、隣接する歯のピッチＰ（図６参照）が、好ましくは０．５〜２０ｍｍ、更に好ましくは０．５〜１０ｍｍである。また、各歯８２ａの幅Ｗ（図６参照、最大幅）は、ピッチＰの好ましくは１／２未満であり、かつ歯８２ａの高さＨ（図６参照）は、好ましくは０．５〜２０ｍｍ、更に好ましくは０．５〜１０ｍｍである。歯溝ロール８０，８１それぞれにおける歯溝の形態がこのような条件を満たすものであると、両歯溝ロール８０，８１間に供給される被延伸加工物（伸縮ギャザー部材連続体５Ａ’）に、高い伸長性を付与することができる。   Moreover, as for the high extension | extension part 82 of the tooth gap roll 80,81, the pitch P (refer FIG. 6) of an adjacent tooth | gear becomes like this. Preferably it is 0.5-20 mm, More preferably, it is 0.5-10 mm. The width W of each tooth 82a (see FIG. 6, maximum width) is preferably less than 1/2 of the pitch P, and the height H of the tooth 82a (see FIG. 6) is preferably 0.5 to. 20 mm, more preferably 0.5 to 10 mm. When the shape of the tooth groove in each of the tooth groove rolls 80 and 81 satisfies such a condition, the stretched workpiece (extensible gather member continuous body 5A ′) supplied between the both tooth groove rolls 80 and 81 is used. , High extensibility can be imparted.

歯のピッチとは、１つの歯の中心線とそれと隣り合う歯の中心線との距離をいう。歯溝ロールの歯の幅とは、１つの歯の幅をいう。歯８２ａの幅は、歯の高さ方向に亘って均一であっても良く、あるいは歯の根元から先端に向かって細くなる台形型であっても良く、あるいは長方形型、三角型等であっても良い。ロールの歯の高さとは、歯の根元から先端までの長さをいう。歯８２ａの幅Ｗは歯８２ａの根元の幅である。   The tooth pitch refers to the distance between the centerline of one tooth and the centerline of the adjacent tooth. The tooth width of the tooth gap roll refers to the width of one tooth. The width of the teeth 82a may be uniform over the height direction of the teeth, or may be a trapezoidal shape that narrows from the root of the tooth toward the tip, or a rectangular shape, a triangular shape, etc. Also good. The height of the teeth of the roll refers to the length from the root to the tip of the teeth. The width W of the tooth 82a is the width of the root of the tooth 82a.

歯溝ロール８０，８１の各ロール軸には、歯８２ａとは別に、ＪＩＳ Ｂ１７０１に規定されている一般的なギアが、駆動用のギアとして取り付けられている。そして、この駆動用のギアが噛み合って回転することで、両ロール８０，８１それぞれの歯８２ａどうしが直接接触しなくても、両ロール８０，８１が同期して回転する。   In addition to the teeth 82a, general gears defined in JIS B1701 are attached to the roll shafts of the tooth gap rolls 80 and 81 as driving gears. Then, the driving gears mesh with each other and rotate, so that both rolls 80 and 81 rotate synchronously even if the teeth 82a of both rolls 80 and 81 do not directly contact each other.

被延伸加工物が通過する、歯溝ロール８０，８１間の隙間は、適宜精密に設定可能であり、該隙間をコントロールすることで、被延伸加工物の延伸倍率を容易に変更することができる。一対の歯溝ロールのうちの一方には、シリンダ等を用いた昇降機能（図示せず）が備わっており、前記隙間のコントロールが容易になされている。前記隙間の微調整には図示されていないが、くさび等を用いることができる。なお、図示した例においては、歯溝ロールは、歯溝部分とロールとが一体化されて構成されているが、歯溝部分だけをセグメント化して構成することもできる。歯溝部分のセグメント化とは、歯溝部分だけが別部材としてロールの周面部に対して着脱自在に取り付け可能になっている構造である。歯溝部分のセグメント化されていると、歯溝の噛み合わせ深さを調整、延伸倍率の変更、延伸パターンの変更などが容易になる。また、刃が磨耗してきた場合であっても、スペアパーツを準備しておけば容易に交換ができるため、ダウンタイムを短くしたり、設備費用を小さくすることができる。更に別の構成としては、スリーブ構造をとることもできる。スリーブ構造であっても同様に設備費用を少なくすることができる。   The gap between the tooth gap rolls 80 and 81 through which the workpiece is passed can be set appropriately and precisely, and the draw ratio of the workpiece can be easily changed by controlling the gap. . One of the pair of tooth gap rolls is provided with an elevating function (not shown) using a cylinder or the like, so that the clearance can be easily controlled. Although not shown in the figure for fine adjustment of the gap, a wedge or the like can be used. In the illustrated example, the tooth gap roll is configured by integrating the tooth gap portion and the roll, but it may be configured by segmenting only the tooth gap portion. The segmentation of the tooth gap portion is a structure in which only the tooth groove portion can be detachably attached to the peripheral surface portion of the roll as a separate member. If the tooth gap portion is segmented, it becomes easy to adjust the meshing depth of the tooth gap, change the draw ratio, change the drawing pattern, and the like. Moreover, even if the blade is worn out, it can be easily replaced by preparing spare parts, so that the downtime can be shortened and the equipment cost can be reduced. As yet another configuration, a sleeve structure may be employed. Even with the sleeve structure, the equipment cost can be reduced as well.

また、歯溝ロール８０，８１は、その周面（高延伸部８２の表面）を所定の温度に加熱しその状態を維持可能な温度制御手段が設けられている。具体的には、両ロールそれぞれに複数個埋め込まれた加熱手段（例えばカートリッジヒータ等）、及び測温手段等を具備している。   Further, the tooth gap rolls 80 and 81 are provided with temperature control means capable of heating the peripheral surface (the surface of the high extension portion 82) to a predetermined temperature and maintaining the state. Specifically, a plurality of heating means (for example, a cartridge heater) embedded in each of both rolls, a temperature measuring means, and the like are provided.

第１実施形態の生理用ナプキン１Ａは、図４に示す製造装置６０Ａを用いて製造することができる。図４に示すように、先ず、長尺状の帯状シート連続体５０’を搬送経路に沿って搬送手段（図示せず）で搬送しながら、合流ロール６５等の合流手段により、弾性部材連続体１５’を帯状シート連続体５０’に合流させる。これによって、該帯状シート連続体５０’の一面上にその長手方向に沿ってほぼ等間隔に４本の糸状の弾性部材連続体１５’を伸長状態で配置・固定される。帯状シート連続体５０’に弾性部材連続体１５’を配置する前に、帯状シート連続体５０’の所定位置に接着剤を塗工手段６１で塗工するとともに、弾性部材連続体１５’に接着剤を塗工手段６２で塗工するため、該所定位置に弾性部材連続体１５’を配置することにより、弾性部材連続体１５’は該所定位置に固定される。こうして、帯状シート連続体５０’に４本の弾性部材連続体１５’が接着剤により伸長状態で接合される（図７（ａ）参照）。   The sanitary napkin 1A of the first embodiment can be manufactured using a manufacturing apparatus 60A shown in FIG. As shown in FIG. 4, first, an elastic member continuum is formed by a merging means such as a merging roll 65 while a long belt-like sheet continuum 50 ′ is conveyed by a conveying means (not shown) along the conveying path. 15 ′ is joined to the belt-like sheet continuous body 50 ′. As a result, four thread-like elastic member continuous bodies 15 ′ are arranged and fixed on one surface of the belt-like sheet continuous body 50 ′ in an elongated state at substantially equal intervals along the longitudinal direction thereof. Before placing the elastic member continuous body 15 ′ on the belt-like sheet continuous body 50 ′, an adhesive is applied to a predetermined position of the belt-like sheet continuous body 50 ′ by the coating means 61 and bonded to the elastic member continuous body 15 ′. In order to apply the agent by the coating means 62, the elastic member continuous body 15 ′ is fixed at the predetermined position by arranging the elastic member continuous body 15 ′ at the predetermined position. In this way, the four elastic member continuous bodies 15 ′ are joined to the belt-like sheet continuous body 50 ′ in an expanded state by the adhesive (see FIG. 7A).

次に、弾性部材連続体１５’が接合した帯状シート連続体５０’を、折り曲げ手段７１を用いて、帯状シート連続体５０’が、該帯状シート連続体５０’に接合された４本の弾性部材連続体１５’を内包するように折り曲げる（図７（ｂ）参照）。折り曲げ手段７１による帯状シート連続体５０’の折り曲げ（第１の折り曲げ）は、帯状シート連続体５０’をその幅方向（ＣＤ）に２つ折りすることによりなされ、これにより、本実施態様における被延伸加工物である、伸縮部材連続体５ａ’が形成される。図７（ｂ）に示すように、該伸縮部材連続体５ａ’において、帯状シート連続体５０’の長手方向（ＭＤ）に沿う両側部が重ね合わされてなる重合部５０ｃ、及び相対向する２層の帯状シート連続体５０’，５０’間に複数本（４本）の弾性部材連続体１５’を挟持固定してなる、弾性部材連続体配置部５３’が形成される。   Next, the belt-like sheet continuum 50 ′ joined with the elastic member continuum 15 ′ is bent by using the bending means 71, and the four elastic pieces obtained by joining the belt-like sheet continuum 50 ′ to the belt-like sheet continuum 50 ′. The member continuous body 15 ′ is bent so as to be included (see FIG. 7B). The folding of the belt-like sheet continuous body 50 ′ by the bending means 71 (first folding) is performed by folding the belt-like sheet continuous body 50 ′ in two in the width direction (CD). A stretchable member continuous body 5a ′, which is a workpiece, is formed. As shown in FIG. 7 (b), in the stretchable member continuum 5a ′, a superposed part 50c in which both side portions along the longitudinal direction (MD) of the belt-like sheet continuum 50 ′ are overlapped, and two layers facing each other. The elastic member continuous body arrangement | positioning part 53 'formed by pinching and fixing the multiple (4 pieces) elastic member continuous body 15' between these strip | belt-shaped sheet | seat continuous bodies 50 'and 50' is formed.

次に、図７（ｂ）に示す如く２つ折りされた伸縮部材連続体５ａ’を、２つ折りされた状態のまま一対の歯溝ロール８０，８１間に供給し、前述した実施態様と同様に、弾性部材連続体配置部５３’を含む、該伸縮部材連続体５ａ’の略全体に延伸加工を施し、伸縮ギャザー部材連続体５Ａ’を得る。伸縮部材連続体５ａ’の両ロール８０，８１間への供給は、両ロール８０，８１を挟んでＭＤの上流側に配された供給ニップロール９３ａ，９３ｂと、下流側に配された所定速度ニップロール９４ａ，９４ｂを用いて伸縮部材連続体５ａ’に一定のテンションを掛けながら行われ、これらのニップロールが装置６０Ａにおける伸長供給手段を構成している。本実施態様のように、延伸加工の加工領域が、伸縮部材連続体５ａ’の幅方向の略全体にわたる場合には、歯溝ロール８０，８１の下流側に配されたニップロール９４ａ，９４ｂの回転速度を、上流側に配された供給ニップロール９３ａ，９３ｂの回転速度よりも速い速度に設定することで、伸縮部材連続体５ａ’のより安定した搬送が可能となる。
両ロール８０，８１間では、弾性部材連続体配置部５３’を含む、伸縮部材連続体５ａ’の略全体が、搬送テンションによって弾性部材連続体１５’の伸縮方向（ＭＤ）に伸長された状態で、高延伸部８２，８２間に噛み込まれる。この噛み込まれた部分におけるシートの形成成分に伸びや破断が発生して適度に破壊されて、伸縮部材連続体５ａ’を構成する帯状シート連続体５０’の塑性変形が起こる。これにより得られる伸縮ギャザー部材連続体５Ａ’に、弾性部材連続体１５’の伸縮方向に伸長性を発現する弾性部材連続体配置部５３’が形成される。 Next, the stretchable member continuous body 5a 'folded in half as shown in FIG. 7B is supplied between the pair of tooth gap rolls 80 and 81 while being folded in the same manner as in the above-described embodiment. Then, substantially the entire stretchable member continuum 5a ′ including the elastic member continuum arrangement portion 53 ′ is stretched to obtain a stretchable gather member continuum 5A ′. Supply of the stretchable member continuous body 5a 'between the two rolls 80, 81 includes supply nip rolls 93a, 93b arranged on the upstream side of the MD across the two rolls 80, 81, and a predetermined speed nip roll arranged on the downstream side. 94a and 94b are used while applying a certain tension to the stretchable member continuous body 5a ', and these nip rolls constitute an extension supply means in the apparatus 60A. As in the present embodiment, when the processing region of the stretching process covers substantially the entire width direction of the elastic member continuous body 5a ′, the rotation of the nip rolls 94a and 94b disposed on the downstream side of the tooth gap rolls 80 and 81 is performed. By setting the speed to a speed faster than the rotation speed of the supply nip rolls 93a and 93b arranged on the upstream side, the stretchable member continuous body 5a ′ can be more stably conveyed.
Between the two rolls 80 and 81, the substantially entire stretchable member continuous body 5a ′ including the elastic member continuous body arranging portion 53 ′ is stretched in the stretchable direction (MD) of the elastic member continuous body 15 ′ by the conveying tension. Thus, it is bitten between the high extension portions 82 and 82. The forming component of the sheet in the bitten portion is stretched or broken to be appropriately broken, and plastic deformation of the belt-like sheet continuous body 50 ′ constituting the elastic member continuous body 5a ′ occurs. The elastic member continuous body arrangement | positioning part 53 'which expresses extensibility in the expansion-contraction direction of elastic member continuous body 15' is formed in expansion-contraction gather member continuous body 5A 'obtained by this.

前記の延伸加工は、ロール８０，８１のうちの少なくとも一方、好ましくは両方を前記の加熱制御手段によって加熱した状態で行う。それゆえ、両ロール８０，８１に噛み込まれて帯状シート連続体５０’上にホットメルト接着剤が滲み出しても、そのホットメルト接着剤は、両ロール８０，８１の周面と接触して溶融状態となり、両ロール８０，８１の歯に付着しにくくなる。そのため、付着したホットメルト接着剤によって歯の高さや幅が変化し、帯状シート連続体５０’の延伸量が大きくなり連続生産に伴って延伸率の上昇が起こる現象を抑制し、生理用ナプキン１Ａを安定的に連続生産できる。また、両ロール８０，８１に付着したホットメルト接着剤を清掃する手間を省くことができる。歯溝ロール８０，８１の双方を加熱する場合、各ロールの周面温度は同温に設定する必要はなく、異なる温度であってもよい。   The stretching process is performed in a state where at least one of the rolls 80 and 81, preferably both, is heated by the heating control means. Therefore, even if the hot melt adhesive oozes out on the belt-like sheet continuous body 50 ′ by being bitten by both the rolls 80 and 81, the hot melt adhesive is in contact with the peripheral surfaces of the both rolls 80 and 81. It becomes a molten state and it becomes difficult to adhere to the teeth of both rolls 80 and 81. For this reason, the height and width of the teeth are changed by the hot melt adhesive adhered, the amount of stretching of the belt-like sheet continuous body 50 ′ is increased, and the phenomenon in which the stretching ratio increases with continuous production is suppressed, and the sanitary napkin 1A Can be stably produced continuously. Moreover, the trouble of cleaning the hot melt adhesive adhering to both rolls 80 and 81 can be saved. When both the tooth gap rolls 80 and 81 are heated, the peripheral surface temperature of each roll need not be set to the same temperature, and may be different temperatures.

延伸加工を受ける被延伸加工物（すなわち伸縮部材連続体５ａ’）において、弾性部材１５は連続体１５’の形状で帯状シート連続体５０’に接合している。それゆえ、弾性部材連続体１５’のうち、延伸加工を受けた部位が加熱によって帯状シート連続体５０’から一旦剥がれたとしても、該部位の前後に帯状シート連続体５０’と接合した部分が存在するので、該部位は伸長された状態のまま、シート連続体５０’と接合した状態に戻りやすい。このため、本実施態様の製造方法では、歯溝ロール８０，８１を加熱しても、弾性部材連続体１５’が帯状シート連続体５０’から剥がれてしまう問題が起こりにくい。   In an object to be stretched (that is, the stretchable member continuous body 5a '), the elastic member 15 is joined to the belt-like sheet continuous body 50' in the shape of the continuous body 15 '. Therefore, even if the stretched portion of the elastic member continuum 15 ′ is once peeled off from the strip-like sheet continuum 50 ′ by heating, there are portions joined to the strip-like sheet continuum 50 ′ before and after the portion. Since it exists, this part is easy to return to the state joined with sheet | seat continuous body 50 'with the extended state. For this reason, in the manufacturing method of this embodiment, even if the tooth gap rolls 80 and 81 are heated, the problem that the elastic member continuous body 15 ′ is peeled off from the belt-like sheet continuous body 50 ′ is unlikely to occur.

延伸加工時の歯溝ロール８０，８１の周面温度は、弾性部材連続体１５’の固定に用いるホットメルト接着剤の軟化点ＴSに対し、２０℃低い温度以上であることが好ましい。このような温度に設定することで、ホットメルト接着剤の接着力を、ホットメルト接着剤の歯溝ロール８０，８１への付着を確実に防止可能な程度に低下させることができる。軟化点ＴSはＪＩＳ−Ｋ−２２０７の環球法に基づき測定される軟化点を指す。 It is preferable that the peripheral surface temperature of the tooth gap rolls 80 and 81 at the time of stretching is equal to or higher than a temperature 20 ° C. lower than the softening point T S of the hot melt adhesive used for fixing the elastic member continuous body 15 ′. By setting such a temperature, the adhesive strength of the hot melt adhesive can be lowered to such an extent that adhesion of the hot melt adhesive to the tooth gap rolls 80 and 81 can be reliably prevented. Softening point T S refers to softening point measured based on the ring and ball method of JIS-K-2207.

ホットメルト接着剤の歯溝ロール８０，８１への付着を確実に防止可能な程度に低い接着力とは、例えば、０．２ｋｇ／ｃｍ2以下であることが好ましく、より好ましくは０．１ｋｇ／ｃｍ2以下である。歯溝ロールの周面温度に対するホットメルト接着剤の接着力は、以下の方法で測定される接着力の値と見なすことができる。 The adhesive strength that is low enough to reliably prevent the hot melt adhesive from adhering to the tooth gap rolls 80 and 81 is, for example, preferably 0.2 kg / cm 2 or less, and more preferably 0.1 kg / cm 2. cm 2 or less. The adhesive force of the hot melt adhesive with respect to the peripheral surface temperature of the tooth space roll can be regarded as the value of the adhesive force measured by the following method.

＜接着力の測定方法＞
前記の接着力の測定は、プローブタック試験法を用いて行う。具体的には、該接着力は、テスター産業（株）社製のプローブタックテスターを用いて測定する。該試験機におけるプローブには、ヒータ及び温度測定用のセンサが含ませてある。プローブの相手側には、受け台が設置されており、この受け台の上にＯＰＰテープ片（１ｃｍ×１ｃｍ）が固定されており、該ＯＰＰテープ片に、坪量３０ｇｓｍのホットメルト接着剤が全面塗工されている。プローブ温度を所定値に設定した上で、プローブの先端径：φ４．５ｍｍ、圧着速度：０．５ｃｍ／ｓｅｃ、圧着荷重：１ｋｇの条件で、プローブとホットメルト接着剤が塗工されたＯＰＰテープ片とを圧着させる。圧着時間は１ｓｅｃとする。圧着後、引き剥がし速さ０．５ｃｍ／ｓｅｃの条件で引き剥がし強度を測定し、設定温度に対する接着力（ｋｇ／ｃｍ2）とする。 <Measurement method of adhesive strength>
The measurement of the adhesive force is performed using a probe tack test method. Specifically, the adhesive strength is measured using a probe tack tester manufactured by Tester Sangyo Co., Ltd. The probe in the testing machine includes a heater and a sensor for temperature measurement. A cradle is installed on the other side of the probe, and an OPP tape piece (1 cm × 1 cm) is fixed on the cradle. A hot melt adhesive having a basis weight of 30 gsm is attached to the OPP tape piece. The whole surface is coated. An OPP tape coated with a probe and a hot melt adhesive under the conditions that the probe temperature is set to a predetermined value, the probe tip diameter is 4.5 mm, the crimping speed is 0.5 cm / sec, and the crimping load is 1 kg. Crimp the piece. The crimping time is 1 sec. After the pressure bonding, the peeling strength is measured under the condition of the peeling speed of 0.5 cm / sec and is defined as the adhesive force (kg / cm 2 ) with respect to the set temperature.

また、歯溝ロール８０，８１それぞれの周面温度の上限は、伸縮ギャザー部材連続体を構成する帯状シート連続体の硬化を防ぐ観点から、帯状シート連続体を構成する材料の(樹脂)の融点より低くすることが好ましく、帯状シート連続体を構成する樹脂の融点より２０°以上低くすることが更に好ましい。ここでいう帯状シート連続体を構成する樹脂の融点とは、帯状シート連続体を構成する樹脂が複数ある場合、複数の樹脂のうち、最も融点が低い樹脂の融点を指す。帯状シート連続体を構成する樹脂が複数ある場合とは、例えば、帯状シート連続体が、複数の樹脂からなる複合繊維から構成されている場合や、複数の繊維から構成されている場合をいう。   Further, the upper limit of the peripheral surface temperature of each of the tooth gap rolls 80 and 81 is the melting point of the (resin) of the material constituting the belt-like sheet continuous body from the viewpoint of preventing curing of the belt-like sheet continuous body constituting the stretchable gather member continuous body. It is preferable to make it lower, and it is still more preferable to make it 20 degrees or more lower than the melting point of the resin constituting the belt-like sheet continuous body. The melting point of the resin constituting the belt-like sheet continuous body here refers to the melting point of the resin having the lowest melting point among the plurality of resins when there are a plurality of resins constituting the belt-like sheet continuous body. The case where there are a plurality of resins constituting the belt-like sheet continuous body means, for example, the case where the belt-like sheet continuous body is made of a composite fiber made of a plurality of resins or a case of being made of a plurality of fibers.

なお、延伸加工を受ける帯状シート連続体５０’において弾性部材連続体１５’の配置箇所は、弾性部材連続体１５’の存在により僅かに***している。このため、延伸加工時に歯溝ロール８０，８１の歯８２ａは、帯状シート連続体５０’における該***した部分に当接し、弾性部材連続体１５’間の部位には実質的に当接しない。それゆえ、第１実施態様の製造方法では、弾性部材連続体が接合されていないシートに延伸加工を施す場合に比べて、ホットメルト接着剤の滲み出す面積は小さい。   In addition, the arrangement | positioning location of the elastic member continuous body 15 'in the strip | belt-shaped sheet | seat continuous body 50' which receives an extending | stretching process has raised slightly by presence of the elastic member continuous body 15 '. For this reason, the teeth 82a of the tooth gap rolls 80 and 81 abut on the raised portion of the belt-like sheet continuous body 50 'during stretching, and do not substantially abut on the portion between the elastic member continuous bodies 15'. Therefore, in the manufacturing method of the first embodiment, the area where the hot melt adhesive oozes is small as compared with the case where the sheet not bonded with the elastic member continuous body is stretched.

また、延伸加工された帯状シート連続体５０’においては、延伸加工によって相対的に坪量が低下した部分が存在し、ホットメルト接着剤は、この坪量が低い部分から特に滲み出しやすい。延伸加工により得られる伸縮ギャザー部材連続体５Ａ’は、弾性部材連続体１５’の存在により、図３に示す凸状の襞が形成されるところ、坪量が低下した部分は、該凸状の襞における頂点部分ではなく、側壁部分に位置する傾向にある。このため滲み出したホットメルト接着剤は、第１実施態様の製造方法により製造された伸縮ギャザー部材の表面に露出しにくい。   Further, in the stretched belt-like sheet continuous body 50 ′, there are portions where the basis weight is relatively lowered by the stretching processing, and the hot melt adhesive is particularly likely to ooze out from the portion where the basis weight is low. The stretchable gather member continuous body 5A ′ obtained by the stretching process has a convex wrinkle shown in FIG. 3 due to the presence of the elastic member continuous body 15 ′. It tends to be located on the side wall portion instead of the apex portion of the heel. For this reason, the hot melt adhesive that has oozed out is difficult to be exposed on the surface of the stretchable gather member manufactured by the manufacturing method of the first embodiment.

本実施態様においては伸縮部材連続体５ａ’を弾性部材の伸縮方向（ＭＤ）に伸長させた状態で、該弾性部材連続体１５’が配された部分に延伸加工を施している。ここで、「伸縮部材連続体５ａ’を弾性部材の伸縮方向に伸長させた状態」とは、伸縮部材連続体５ａ’における弾性部材連続体１５’（延伸加工が施される部分の弾性部材連続体１５’）が、搬送テンション等によって引っ張られることによって、該伸縮部材連続体５ａ’を構成する帯状シート連続体への該弾性部材の接合固定時における伸長率（以下、接合時伸長率ともいう）と略同じ伸長率で伸長している状態を意味し、該伸縮部材連続体５ａ’を構成する帯状シート連続体が伸長されているか否かを問わない。ここで、接合時伸長率と略同じ伸長率は、接合時伸長率よりも若干小さい伸長率から若干大きい伸長率までを含むものであり、具体的には、接合時伸長率に対して０．５〜１．５倍の範囲にあることが好ましい。   In this embodiment, the stretched member continuous body 5a 'is stretched in the stretched direction (MD) of the elastic member, and the portion where the elastic member continuous body 15' is disposed is stretched. Here, “the state in which the stretchable member continuous body 5a ′ is extended in the stretchable direction of the elastic member” means that the elastic member continuous body 15 ′ in the stretchable member continuous body 5a ′ (the elastic member continuous portion of the stretched portion). When the elastic member is joined and fixed to the belt-like sheet continuous body constituting the elastic member continuous body 5a 'by the body 15') being pulled by a conveying tension or the like (hereinafter also referred to as a joint elongation ratio). ), And the belt-like sheet continuous body constituting the stretchable member continuous body 5a ′ is extended or not. Here, the elongation rate substantially the same as the bonding elongation rate includes from a slightly smaller elongation rate to a slightly larger elongation rate than the bonding elongation rate. It is preferable to be in the range of 5 to 1.5 times.

延伸加工後、図７（ｂ）に示す如く折り曲げられた状態の伸縮ギャザー部材連続体５Ａ’を、折り曲げ手段７２を用いて、図７（ｃ）に示す如く折り曲げる。折り曲げ手段７２による伸縮ギャザー部材連続体５Ａ’の折り曲げ（第２の折り曲げ）は、弾性部材連続体配置部５３’を重合部５０ｃの一面側に折り曲げることによりなされる。図示しないが、装置６０Ａにおいては、図７（ｂ）の如く折り曲げられた一対の伸縮ギャザー部材連続体５Ａ’が、それぞれの弾性部材連続体配置部５３’どうしが向き合うように帯状シート連続体５０’の幅方向（ＣＤ）に並んだ状態で搬送されており、折り曲げ手段７２は、該一対の伸縮ギャザー部材連続体５Ａ’それぞれの弾性部材連続体配置部５３’を、重合部５０ｃにおける肌当接面側に折り曲げる。折り曲げ手段７２の下流側に配置されたニップロール９５ａ，９５ｂは、折り加工の下流において被折り加工物を引っ張る役割を果たす。この点は、図４並びに後述する図８及び図１０に示す各折り曲げ手段の下流に配置されたニップロール９３ａ，９３ｂ，９６ａ，９６ｂ，９７ａ，９７ｂ，９８ａ，９８ｂも同様である。   After the stretching process, the stretchable gather member continuous body 5A 'in a folded state as shown in FIG. 7B is bent using the bending means 72 as shown in FIG. 7C. The folding gather member continuous body 5A 'is bent (second bending) by the bending means 72 by bending the elastic member continuous body arranging portion 53' to one surface side of the overlapping portion 50c. Although not shown, in the device 60A, a pair of stretchable gather member continuums 5A ′ bent as shown in FIG. 7 (b) is a belt-like sheet continuum 50 so that the elastic member continuum arrangement portions 53 ′ face each other. The folding means 72 transfers the elastic member continuous body arrangement portion 53 'of each of the pair of stretchable gather member continuous bodies 5A' to the skin contact in the overlapping portion 50c. Bend to the contact side. The nip rolls 95a and 95b arranged on the downstream side of the bending means 72 play a role of pulling the workpiece to be folded downstream of the folding process. This also applies to nip rolls 93a, 93b, 96a, 96b, 97a, 97b, 98a, and 98b arranged downstream of each bending means shown in FIG. 4 and FIGS. 8 and 10 described later.

その後、伸縮ギャザー部材連続体５Ａ’（防漏壁５Ａ連続体）を、防漏壁５Ａを除く、ナプキン１Ａの他の構成部材の連続体と接合させる。図４に示す例では、伸縮ギャザー部材連続体５Ａ’を、所定手段（図示せず）によって、表面シート連続体２’と接合させる。次に、該接合によって得られた伸縮ギャザー部材連続体５Ａ’と表面シート連続体２’との複合体に、所定手段（図示せず）によって、吸収体間欠体４’を接合させる。図４に示すように、吸収体間欠体４’は、吸収体原料の堆積物からなる吸収体連続体４ａ’を、カットロール９９ａとアンビルロール９９ｂとの間に挟み、所定長さに切断してなる個々の吸収体４が、搬送方向（ＭＤ）に間欠的に並んだものである。更に、前記の接合によって得られた伸縮ギャザー部材連続体５Ａ’と表面シート連続体２’と吸収体間欠体４’との複合体に、所定手段（図示せず）によって、裏面シート連続体３’を接合させる。これにより、伸縮ギャザー部材連続体５Ａ’と表面シート連続体２’と吸収体間欠体４’と裏面シート連続体３’との複合体１’が得られる。表面シート連続体２’と裏面シート連続体３’とは、吸収体間欠体４’の周囲において接着剤または融着により接合されている。   Thereafter, the stretchable gather member continuous body 5A ′ (leakproof wall 5A continuous body) is joined to a continuous body of other constituent members of the napkin 1A excluding the leakproof wall 5A. In the example shown in FIG. 4, the stretchable gather member continuum 5 </ b> A ′ is joined to the topsheet continuum 2 ′ by a predetermined means (not shown). Next, the absorber intermittent body 4 'is joined to the composite body of the stretchable gather member continuous body 5A' and the surface sheet continuous body 2 'obtained by the joining by a predetermined means (not shown). As shown in FIG. 4, the absorber intermittent body 4 ′ is formed by sandwiching an absorber continuous body 4 a ′ composed of deposits of absorber raw materials between a cut roll 99 a and an anvil roll 99 b and cutting it to a predetermined length. The individual absorbent bodies 4 are arranged intermittently in the transport direction (MD). Furthermore, the back sheet continuous body 3 is formed on the composite of the stretchable gather member continuous body 5A ′, the top sheet continuous body 2 ′, and the absorber intermittent body 4 ′ obtained by the above-mentioned joining by a predetermined means (not shown). 'Join. As a result, a composite 1 'of the stretchable gather member continuous body 5A', the top sheet continuous body 2 ', the absorber intermittent body 4', and the back sheet continuous body 3 'is obtained. The top sheet continuous body 2 ′ and the back sheet continuous body 3 ′ are joined together by an adhesive or fusion around the absorber intermittent body 4 ′.

切断手段としてのカットロール９１は周面に切断刃を有し、アンビルロール９２は周面平滑である。前記複合体１’を両ロール９１，９２の回転により所定長さに切断すると、目的とする生理用ナプキン１Ａが得られる。   The cut roll 91 as a cutting means has a cutting blade on the peripheral surface, and the anvil roll 92 is smooth on the peripheral surface. When the composite 1 'is cut into a predetermined length by the rotation of both rolls 91 and 92, the intended sanitary napkin 1A is obtained.

前述した製造工程に用いる各形成材料について説明すると、伸縮ギャザー部材連続体５Ａ’を構成する帯状シート連続体５０’としては、例えば不織布、樹脂シート、エラストマー材料、エラストマーを含むシート複合材料等を用いることができる。特に伸長性、柔軟性、肌触り感の観点から、不織布が好ましい。更に、前記の製造工程のように防漏壁形成に使用する場合、撥水性を有する不織布が好ましい。使用可能な不織布としては、例えば弾性繊維若しくは非弾性繊維からなるスパンボンド不織布、メルトブローン不織布、スパンボンドとメルトブローンとを組み合わせたＳＭＳ不織布、エアスルー不織布、ヒートロール不織布、スパンレース不織布、エアーレイド不織布、レジンボンド不織布等の各種製法によるものが挙げられる。使用可能な不織布を構成する繊維の材質としては、ポリエチレン、ポリプロピレン、ポリエステル、アクリル等の合成樹脂が挙げられる。
繊維空隙を小さくし、ホットメルト接着剤の滲み出しを一層防止する観点からは、スパンボンド不織布やＳＭＳ不織布を用いるのが好ましい。 The respective forming materials used in the manufacturing process described above will be described. As the belt-like sheet continuous body 50 ′ constituting the stretchable gather member continuous body 5A ′, for example, a nonwoven fabric, a resin sheet, an elastomer material, a sheet composite material containing an elastomer, or the like is used. be able to. Nonwoven fabrics are particularly preferred from the viewpoints of extensibility, flexibility, and feel. Furthermore, when using for leak-proof wall formation like the said manufacturing process, the nonwoven fabric which has water repellency is preferable. Usable non-woven fabrics include, for example, spunbonded non-elastic fibers, meltblown non-woven fabrics, SMS non-woven fabrics that combine spunbond and meltblown, air-through non-woven fabrics, heat roll non-woven fabrics, spunlace non-woven fabrics, air-laid non-woven fabrics, resins The thing by various manufacturing methods, such as a bond nonwoven fabric, is mentioned. Examples of the material of the fibers constituting the usable nonwoven fabric include synthetic resins such as polyethylene, polypropylene, polyester, and acrylic.
From the viewpoint of reducing the fiber gap and further preventing the hot melt adhesive from oozing out, it is preferable to use a spunbond nonwoven fabric or an SMS nonwoven fabric.

また、弾性部材連続体１５’としては、この種のおむつに従来用いられている公知の材質のものを特に制限なく用いることができる。材質としては、例えば、スチレン−ブタジエン、ブタジエン、イソプレン、ネオプレン等の合成ゴム、天然ゴム、ＥＶＡ、ＳＩＳ（スチレン−イソプレン−スチレン）、ＳＥＢＳ（スチレン−エチレン−ブチレン−スチレン）、ＳＥＰＳ（スチレン−エチレン−プロピレン−スチレン）、伸縮性ポリオレフィン、ポリウレタン等が挙げられる。その形態としては、糸状、帯状、リボン状、フィルム状、ネット状等から適宜選択することができ、伸縮ギャザー部材連続体５Ａ’においてホットメルト接着剤が滲み出しやすい弾性部材連続体配置部の面積を小さくする観点から、糸状が好ましい。
また、帯状シート連続体５０’と弾性部材連続体１５’との接合に用いられる接着剤としては、例えば、スチレン系（ＳＩＳ、ＳＢＳ、ＳＥＢＳ）、ポリオレフィン系、のホットメルト接着剤が挙げられる。またホットメルト接着剤は、軟化点が７０〜１５０℃であるものを用いることが好ましい。 Further, as the elastic member continuous body 15 ', a known material conventionally used for this type of diaper can be used without any particular limitation. Examples of the material include synthetic rubbers such as styrene-butadiene, butadiene, isoprene and neoprene, natural rubber, EVA, SIS (styrene-isoprene-styrene), SEBS (styrene-ethylene-butylene-styrene), and SEPS (styrene-ethylene). -Propylene-styrene), stretchable polyolefin, polyurethane and the like. As its form, it can be appropriately selected from a thread shape, a belt shape, a ribbon shape, a film shape, a net shape, and the like, and the area of the elastic member continuous body arrangement portion where the hot melt adhesive easily oozes out in the stretchable gather member continuous body 5A ′. From the viewpoint of reducing the size, a thread shape is preferable.
Examples of the adhesive used for joining the belt-like sheet continuous body 50 ′ and the elastic member continuous body 15 ′ include styrene (SIS, SBS, SEBS) and polyolefin hot melt adhesives. Moreover, it is preferable to use what has a softening point of 70-150 degreeC as a hot-melt-adhesive.

その他、吸収性物品の製造に用いる各種部材（表面シート２、裏面シート、及び吸収体４等の連続体の材料）としては、この種のおむつに従来用いられている各種公知のものを特に制限なく用いることができる。   In addition, as various members (continuous materials such as the top sheet 2, the back sheet, and the absorber 4) used for manufacturing the absorbent article, various known materials that are conventionally used for this type of diaper are particularly limited. Can be used.

以下、第２及び第３実施態様の吸収性物品の製造方法を説明する。以下の説明においては、前述した第１実施態様と同様の構成部分は同一の符号を付して説明を省略する。特に説明しない構成部分は、前述した第１実施形態及び第２実施形態の説明が適宜適用される。   Hereinafter, the manufacturing method of the absorbent article of the 2nd and 3rd embodiment is demonstrated. In the following description, the same components as those in the first embodiment described above are denoted by the same reference numerals and description thereof is omitted. The description of the first embodiment and the second embodiment described above is appropriately applied to components that are not particularly described.

図８に、第２実施態様の製造方法に用いる製造装置６０Ｂを示す。製造装置６０Ａを用いた本発明の製造方法の第１実施態様では、図７（ｂ）に示す如く折り曲げられた伸縮部材連続体５ａ’に、一対の歯溝ロール８０，８１を用いて延伸加工を施した後、延伸加工により得られた伸縮ギャザー部材連続体５Ａ’を、折り曲げ手段７２を用いて図７（ｃ）に示す如く折り曲げたが、本製造装置６０Ｂを用いた吸収性物品の製造方法では、図８に示すように、折り曲げ手段７２を用い、図７（ｃ）に示す如く折り曲げられた伸縮部材連続体５ａ’に、一対の歯溝ロール８０，８１を用いて延伸加工を施す。第２実施態様によっても、第１実施態様と同様に、生理用ナプキン１Ａが安定的に得られる。   FIG. 8 shows a manufacturing apparatus 60B used in the manufacturing method of the second embodiment. In the first embodiment of the manufacturing method of the present invention using the manufacturing apparatus 60A, a stretchable member continuous body 5a ′ bent as shown in FIG. 7B is stretched using a pair of tooth groove rolls 80 and 81. Then, the stretchable gather member continuum 5A ′ obtained by the stretching process was folded using the folding means 72 as shown in FIG. 7C, but the absorbent article was manufactured using the manufacturing apparatus 60B. In the method, as shown in FIG. 8, a bending means 72 is used, and a stretchable member continuous body 5a ′ bent as shown in FIG. 7C is stretched using a pair of tooth gap rolls 80 and 81. . According to the second embodiment, the sanitary napkin 1A can be stably obtained as in the first embodiment.

第３実施態様の製造方法は、前述した生理用ナプキン１Ａに代えて、図９に示す生理用ナプキン１Ｂを製造するものである。以下の生理用ナプキン１Ｂの説明については前述した生理用ナプキン１Ａと異なる構成部分を主として説明し、同様の構成部分は同一の符号を付して説明を省略する。説明しない構成部分は、生理用ナプキン１Ａについての説明が適宜適用される。   The manufacturing method of a 3rd embodiment replaces with the sanitary napkin 1A mentioned above, and manufactures the sanitary napkin 1B shown in FIG. In the following description of the sanitary napkin 1B, components different from the sanitary napkin 1A described above will be mainly described, and the same components will be denoted by the same reference numerals and description thereof will be omitted. The description of the sanitary napkin 1A is applied as appropriate to the components not described.

生理用ナプキン１Ａの防漏壁５Ａが幅方向Ｙに沿う断面視において略逆Ｌ字状に起立していたのに対し、該生理用ナプキン１Ｂの防漏壁５Ｂは、該断面視において起立部５２及び弾性部材配置部５３が略Ｔ字状を形成するように起立する。
具体的には、ナプキン１Ｂにおける防漏壁５Ｂは、図９に示すように弾性部材配置部（面状部）５３が、起立部５２（基壁部５１）の上端部から幅方向Ｙの外方に略水平に張り出す外方弾性部材配置部５３Ｂだけでなく、該上端部から幅方向Ｙの内方に略水平に張り出す内方弾性部材配置部５３Ａを有し、両者が一体となって平面状に形成されている。なお、外方弾性部材配置部は、１枚の帯状シートが折り曲げられてなる相対向する２層の帯状シート５０，５０の間に２本、内方弾性部材配置部は４本の弾性部材１５が、それぞれ伸長状態で配置・接合されている。また、防漏壁５Ｂの基壁部５１における起立部５２以外の部分は、吸収体４（下層吸収体４０）の長手方向Ｘに沿う側部に沿って巻き下げられ、更にその一部が吸収体４（下層吸収体４０）と裏面シート３との間に介在配置されて、接着剤やヒートシール等の公知の接合手段によって固定されている。 The leak-proof wall 5A of the sanitary napkin 1A was erected in a substantially inverted L shape in a cross-sectional view along the width direction Y, whereas the leak-proof wall 5B of the sanitary napkin 1B was an upright portion in the cross-sectional view. 52 and the elastic member placement portion 53 stand so as to form a substantially T-shape.
Specifically, the leakage preventing wall 5B of the napkin 1B has an elastic member arrangement portion (planar portion) 53, as shown in FIG. 9, that extends from the upper end portion of the upright portion 52 (base wall portion 51) in the width direction Y. In addition to the outer elastic member arrangement portion 53B extending substantially horizontally, the inner elastic member arrangement portion 53A extends substantially horizontally from the upper end inward in the width direction Y, and both are integrated. It is formed in a flat shape. The outer elastic member arrangement part is provided between two opposing belt-like sheets 50, 50 formed by bending one belt-like sheet, and the inner elastic member arrangement part is provided with four elastic members 15. Are arranged and joined in an extended state. Moreover, parts other than the standing part 52 in the base wall part 51 of the leak-proof wall 5B are wound down along the side part along the longitudinal direction X of the absorber 4 (lower layer absorber 40), and also that part absorbs. It is interposed between the body 4 (the lower layer absorbent body 40) and the back sheet 3, and is fixed by a known joining means such as an adhesive or heat seal.

生理用ナプキン１Ｂの製造方法は、図１０に示す製造装置６０Ｃを用い、次のように実施することができる。同図に示すように、長尺状の帯状シート連続体５０’を搬送経路に沿って搬送手段（図示せず）で搬送しながら、前記合流手段によって、該帯状シート連続体５０’の一面上にその長手方向に沿ってほぼ等間隔に２本の糸状の弾性部材連続体１５’を伸長状態で配置・固定する。それによって、帯状シート連続体５０’に、２本の弾性部材連続体１５’が、接着剤によって伸長状態で接合される。   The method for manufacturing the sanitary napkin 1B can be performed as follows using the manufacturing apparatus 60C shown in FIG. As shown in the figure, while the continuous belt-like sheet continuous body 50 ′ is transported by a transporting means (not shown) along the transporting path, the merging means causes the continuous belt-shaped sheet continuous body 50 ′ on the one surface. In addition, two thread-like elastic member continuous bodies 15 'are arranged and fixed in an extended state at substantially equal intervals along the longitudinal direction. Thereby, the two elastic member continuous bodies 15 ′ are bonded to the belt-like sheet continuous body 50 ′ in an expanded state by the adhesive.

次に、折り曲げ手段７３を用いて、帯状シート連続体５０’を、該帯状シート連続体５０’が該帯状シート連続体５０’に接合された２本の弾性部材連続体１５’を内包するように折り曲げる（図１１（ａ）参照）。折り曲げ手段７３による伸縮ギャザー部材連続体５Ｂ’の折り曲げ（第１の折り曲げ）は、帯状シート連続体５０’の長手方向（ＭＤ）に沿う一側部５０ａを幅方向（ＣＤ）の内方に折り曲げた後、更に該一側部５０ａを該幅方向の外方に折り曲げることによりなされ、これにより帯状シート連続体５０’は、図１１（ａ）に示すようにＺ字状に折り曲げられる。   Next, the belt-like sheet continuous body 50 ′ is encapsulated by using the bending means 73 so as to enclose the two elastic member continuous bodies 15 ′ joined to the belt-like sheet continuous body 50 ′. (See FIG. 11A). The folding gather member continuous body 5B ′ is folded (first folded) by the folding means 73 by bending one side portion 50a along the longitudinal direction (MD) of the belt-like sheet continuous body 50 ′ inward in the width direction (CD). Thereafter, the one side portion 50a is further bent outward in the width direction, whereby the belt-like sheet continuous body 50 ′ is bent in a Z shape as shown in FIG.

次に、帯状シート連続体５０’における、２本の弾性部材連続体１５’が固定された面上に、該２本の弾性部材連続体１５’に沿ってほぼ等間隔に４本の糸状の弾性部材連続体１５’を伸長状態で配置・固定する。４本の弾性部材連続体１５’には、帯状シート連続体５０’上に供給する前に塗工手段６３で接着剤を塗工する。   Next, on the surface of the belt-like sheet continuous body 50 'on which the two elastic member continuous bodies 15' are fixed, four thread-like shapes are arranged at approximately equal intervals along the two elastic member continuous bodies 15 '. The elastic member continuous body 15 ′ is disposed and fixed in an extended state. An adhesive is applied to the four elastic member continuous bodies 15 ′ by the coating means 63 before being supplied onto the belt-like sheet continuous body 50 ′.

引き続き、折り曲げ手段７４を用いて、帯状シート連続体５０’を、該帯状シート連続体５０’に接合された６本の弾性部材連続体１５’を内包するように折り曲げる（図１１（ｂ）参照）。折り曲げ手段７４による伸縮ギャザー部材連続体５Ｂ’の折り曲げ（第２の折り曲げ）は、帯状シート連続体５０’の長手方向（ＭＤ）に沿う他側部５０ｂ（第１の折り曲げにより折り曲げられた一側部５０ａとは反対側の側部）を、幅方向（ＣＤ）の内方に折り曲げて一側部５０ａに重ね合わせ、両側部５０ａ，５０ｂの重合部５０ｃを形成することによりなされ、これにより、相対向する２層の帯状シート連続体５０’，５０’間に複数本（６本）の弾性部材連続体１５’を挟持固定してなる、弾性部材連続体配置部５３’が形成される。   Subsequently, the belt-like sheet continuous body 50 ′ is bent using the bending means 74 so as to enclose the six elastic member continuous bodies 15 ′ joined to the belt-like sheet continuous body 50 ′ (see FIG. 11B). ). The folding gather member continuous body 5B ′ is folded (second folded) by the folding means 74 by the other side portion 50b (one side folded by the first folding) along the longitudinal direction (MD) of the strip-shaped sheet continuous body 50 ′. The side portion opposite to the portion 50a) is folded inward in the width direction (CD) and overlapped with the one side portion 50a to form the overlapping portion 50c of both side portions 50a and 50b. The elastic member continuous body arrangement | positioning part 53 'formed by pinching | interposing and fixing the multiple (six) elastic member continuous body 15' between the strip | belt-shaped continuous sheet | seats 50 'and 50' of 2 layers which oppose each other is formed.

図１１（ｂ）に示す如く折り曲げられた帯状シート連続体５０’は、折り曲げ手段７５を用いて、図１１（ｃ）に示すとおり折り曲げられる。折り曲げ手段７５による帯状シート連続体５０’の折り曲げ（第３の折り曲げ）は、弾性部材連続体配置部５３’を、重合部５０ｃを介して反対側に反転させることによりなされ、これによって、弾性部材連続体配置部５３’が重合部５０ｃの上方に位置した、本実施態様の被延伸加工物である伸縮部材連続体５ｂ’が形成される。   The belt-like sheet continuous body 50 ′ bent as shown in FIG. 11B is bent as shown in FIG. 11C using the bending means 75. The folding of the belt-like sheet continuous body 50 ′ (third bending) by the bending means 75 is performed by inverting the elastic member continuous body arranging portion 53 ′ to the opposite side via the overlapping portion 50c, whereby the elastic member The stretchable member continuous body 5b ′, which is the stretched product of the present embodiment, is formed in which the continuous body arranging portion 53 ′ is positioned above the overlapping portion 50c.

こうして、帯状シート連続体５０’が弾性部材連続体１５’を内包するように折り曲げられて図１１（ｃ）に示す如き折り曲げ状態とされた、伸縮部材連続体５ｂ’を、一対の歯溝ロール８０，８１間に供給して延伸加工を行う。
伸縮部材連続体５ｂ’に延伸加工を施した後の工程は、第１実施態様と同様であるため説明を省略する。 In this way, the belt-like sheet continuous body 50 ′ is bent so as to include the elastic member continuous body 15 ′, and the elastic member continuous body 5 b ′ in a bent state as shown in FIG. Supply between 80 and 81 to perform stretching.
Since the process after extending | stretching process to elastic member continuous body 5b 'is the same as that of a 1st embodiment, description is abbreviate | omitted.

なお、第３実施態様において、図１１（ｃ）に示す如く折り曲げられた伸縮部材連続体５ｂ’に延伸加工を施す代わりに、折り曲げ手段７４を用いて図１１（ｂ）に示す如く折り曲げられた伸縮部材連続体５ｂ’に、一対の歯溝ロール８０，８１を用いて延伸加工を施して弾性部材連続体配置部５３’を形成した後、延伸加工により得られた該伸縮ギャザー部材連続体５Ｂ’を、折り曲げ手段７５を用いて図１１（ｃ）に示す如く折り曲げてもよい。   In the third embodiment, instead of subjecting the stretchable member continuous body 5b ′ folded as shown in FIG. 11 (c) to the drawing process, the folding means 74 is bent as shown in FIG. 11 (b). The elastic member continuous body 5b ′ is stretched using a pair of tooth gap rolls 80 and 81 to form the elastic member continuous body arranging portion 53 ′, and then the stretchable gather member continuous body 5B obtained by the stretching process. 'May be bent using the bending means 75 as shown in FIG.

以上、本発明をその好ましい実施態様に基づき説明したが、本発明は前記実施形態、前記実施態様に制限されない。例えば、第１ないし第３実施態様においては、延伸加工により得られた伸縮ギャザー部材連続体を、生理用ナプキンの他の構成部材に接合させ、該接合により得られた伸縮ギャザー部材連続体と該他の構成部材の連続体との複合体１’を、所定長さに切断していた。これに代えて、延伸加工が施される前の伸縮部材連続体を、生理用ナプキンの他の構成部材と接合させ、該接合により得られた伸縮部材連続体と該他の構成部材の連続体との複合体における伸縮部材連続体に延伸加工を施し、その後、該延伸加工後の前記複合体を所定長さに切断してもよい。   As mentioned above, although this invention was demonstrated based on the preferable embodiment, this invention is not restrict | limited to the said embodiment and the said embodiment. For example, in the first to third embodiments, the stretchable gather member continuum obtained by stretching is joined to other constituent members of a sanitary napkin, and the stretchable gather member continuum obtained by joining and the stretched gather member continuum The composite 1 ′ with a continuous body of other constituent members was cut to a predetermined length. Instead, the stretchable member continuum before being stretched is joined to other constituent members of the sanitary napkin, and the stretchable member continuum obtained by the joining and the continuum of the other constituent members. The stretched member continuous body in the composite body may be stretched, and then the composite body after the stretching process may be cut into a predetermined length.

また、第１ないし第３実施態様においては、弾性部材連続体が接合した帯状シート連続体５０’を、該弾性部材連続体を内包するように幅方向に折り畳んで、該折り畳みにより相対した２層５０’，５０’の間に弾性部材連続体を接合することにより、伸縮部材連続体５ａ’又は５ｂ’を得ていた。しかし、弾性部材連続体１５’が接合した帯状シートの連続体５０’に、更に別の帯状シート連続体とを合流させて、２枚の帯状シート連続体の間に該弾性部材連続体を接合することにより、伸縮部材の連続体を得てもよい。   In the first to third embodiments, the belt-like sheet continuous body 50 ′ joined with the elastic member continuous body is folded in the width direction so as to enclose the elastic member continuous body, and the two layers opposed by the folding are folded. The elastic member continuous body 5a 'or 5b' was obtained by joining the elastic member continuous body between 50 'and 50'. However, the belt-like sheet continuum 50 'joined with the elastic member continuum 15' is joined with another belt-like sheet continuum to join the elastic member continuum between the two belt-like sheet continuums. By doing so, you may obtain the continuous body of an expansion-contraction member.

また、図７（ｂ）や図１１（ｂ）においては、帯状シート連続体を側部どうしが重ねあわされた重合部を形成するように折り曲げたが、必ずしもその必要はない。例えば、第１及び第２実施態様において、帯状シート連続体を図７（ｂ）のように折り曲げる代わりに、帯状シート連続体の幅方向の一部のみを二層とするように折り曲げ、その層間に弾性部材連続体を挟持固定して弾性部材配置部を形成して、防漏壁における基壁部を一層の帯状シートで形成してもよい。   Moreover, in FIG.7 (b) and FIG.11 (b), although the strip | belt-shaped sheet | seat continuous body was bent so that the superposition | polymerization part with which the side parts were overlapped was formed, it is not necessarily required. For example, in the first and second embodiments, instead of bending the belt-like sheet continuous body as shown in FIG. 7B, only a part of the belt-like sheet continuous body in the width direction is folded into two layers. Alternatively, the elastic member continuous body may be sandwiched and fixed to form the elastic member arrangement portion, and the base wall portion of the leak-proof wall may be formed of a single belt-like sheet.

また、前述した第１ないし第３実施態様では、伸縮部材連続体５ａ’又は５ｂ’の幅方向（ＣＤ）の全体が延伸加工されていたが、本発明においては、伸縮部材連続体５ａ’又は５ｂ’の弾性部材連続体配置部５３’が延伸加工されていればよく、延伸加工が施される部分は前記実施形態に制限されない。例えば、伸縮部材連続体５ａ’又は５ｂ’において、弾性部材連続体配置部５３’に加えて、伸縮部材連続体５ａ’又は５ｂ’における、基壁部５１の一部、具体的には、接合部１３（吸収体４の上方に位置する表面シート２との接合部）を基準として着用時に該接合部１３よりも着用者の肌側に位置する、起立部５２（基壁部５１の上方部）を構成する部分が延伸加工されて、基壁部５１における起立部５２以外の部分（基壁部５１の下方部）を構成する部分は、延伸加工が施されていなくてもよい。   In the first to third embodiments described above, the entire stretched member continuous body 5a ′ or 5b ′ is stretched in the width direction (CD). However, in the present invention, the stretchable member continuous body 5a ′ or It is only necessary that the elastic member continuous body arrangement portion 53 ′ of 5b ′ is stretched, and the portion to which the stretching process is performed is not limited to the above embodiment. For example, in the elastic member continuous body 5a ′ or 5b ′, in addition to the elastic member continuous body arrangement portion 53 ′, a part of the base wall 51 in the elastic member continuous body 5a ′ or 5b ′, specifically, bonding Standing portion 52 (upper portion of base wall portion 51) positioned on the skin side of the wearer from the joint portion 13 when worn with reference to the portion 13 (joint portion with the topsheet 2 located above the absorber 4). ) Is stretched, and the portion of the base wall portion 51 other than the standing portion 52 (the lower portion of the base wall portion 51) may not be stretched.

また、前述した第１ないし第３実施態様では、伸縮部材連続体５ａ’又は５ｂ’が長手方向に連続的に延伸加工されていた。しかし、弾性部材連続体に延伸加工を施すことを前提に、伸縮部材連続体５ａ’又は５ｂ’に間欠的に延伸加工を施してもよい。このような間欠的な延伸加工により、防漏壁５Ａ又は５Ｂにおける、端部固定部５４を含んでそれよりも長手方向Ｘの外方に位置する部分（防漏壁の長手方向端部）を構成する部分には、延伸加工を施さないようにしてもよい。   In the first to third embodiments described above, the stretchable member continuous body 5a 'or 5b' is continuously stretched in the longitudinal direction. However, on the assumption that the elastic member continuum is stretched, the stretchable member continuum 5a 'or 5b' may be intermittently stretched. By such an intermittent stretching process, the portion of the leak-proof wall 5A or 5B that includes the end fixing portion 54 and is located further outward in the longitudinal direction X (the longitudinal end portion of the leak-proof wall). You may make it not perform a extending | stretching process to the part to comprise.

また、略円筒形状の一対の歯溝ロールの歯溝は、該歯溝ロールの円周方向及びロール軸方向（幅方向）において周面の全域に設けず、被延伸加工物における延伸加工が必要な部分に合わせて、周面に部分的に設けてもよい。例えば、歯溝ロールの幅方向の一部に歯溝を設けて、帯状シート連続体における歯溝加工領域を、弾性部材連続体の配置箇所に限定する場合、帯状シート連続体の大半は延伸されない。このため、帯状シート連続体としてスパンボンドのような伸びのほとんど生じない不織布を使用し、歯溝ロールの下流側に配されたニップロールの回転速度を、歯溝ロールの上流側に配された供給ニップロールの回転速度と同じ速度に設定すると、より安定した搬送が可能となる。   Further, the tooth grooves of the pair of substantially cylindrical tooth groove rolls are not provided in the entire circumferential surface in the circumferential direction and the roll axial direction (width direction) of the tooth groove roll, and need to be drawn in the work piece to be drawn. It may be partially provided on the peripheral surface in accordance with this part. For example, when a tooth gap is provided in a part of the width direction of the tooth groove roll and the tooth gap processing region in the belt-like sheet continuous body is limited to the arrangement position of the elastic member continuous body, most of the belt-like sheet continuous body is not stretched. . For this reason, a non-woven fabric such as spunbond that hardly generates elongation is used as the continuous belt-like sheet, and the rotational speed of the nip roll arranged on the downstream side of the tooth gap roll is supplied on the upstream side of the tooth groove roll. If it is set to the same speed as the rotational speed of the nip roll, more stable conveyance is possible.

以下、本発明を実施例により更に具体的に説明するが、本発明はこれらに限定されるものではない。   EXAMPLES Hereinafter, the present invention will be described more specifically with reference to examples, but the present invention is not limited to these examples.

〔実施例１〕
第１実施態様の生理用ナプキンの製造方法と実質的に同様の方法で伸縮部材連続体５ａ’を得、該伸縮部材連続体５ａ’に対し延伸加工を施した。具体的には、帯状シート連続体５０’にホットメルト接着剤を介して４本の弾性部材連続体１５’を伸長状態〔弾性部材連続体１５’を自然長の１．４倍の長さに引き伸ばした状態（伸長率１４０％の状態）〕で接合した後、折り曲げ手段７１を用いて、図７（ｂ）に示す伸縮部材連続体５ａ’を得た。弾性部材連続体配置部５３’の幅方向（ＣＤ）の幅Ｌ１（図７（ｂ）参照）は１０ｍｍ、延伸加工時の伸縮部材連続体５ａ’の幅方向（ＣＤ）の幅Ｌ２（図７（ｂ）参照）は４０ｍｍであった。
前記伸縮部材連続体５ａ’に、一対の歯溝ロール８０，８１によって延伸加工を施した。延伸加工時の歯溝ロール８０，８１それぞれの加熱温度はいずれも９０℃とした。一対の歯溝ロール８０，８１からなる延伸加工装置の運転開始から１、１０、３０分間経過した各時点における被延伸加工部位の延伸率を後述する方法で測定した。
帯状シート連続体５０’としては、坪量３０ｇ／ｍ2のスパンボンド不織布を用いた。前記スパンボンド不織布の構成繊維は、芯成分がポリプロピレン、鞘成分がポリエチレンでありかつ両成分の含有比率が５０：５０である、芯鞘型複合繊維であった。帯状シート連続体５０’を構成する樹脂の融点は、１２５℃であった。帯状シート連続体５０’に配置・固定させる弾性部材として、４本の糸ゴムを用いた。ホットメルト接着剤としては、組成がスチレン−ブタジエン共重合体で、軟化点が９４℃のものを用いた。伸縮部材連続体５ａ’の延伸加工は、該伸縮部材連続体５ａ’を構成する４本の糸ゴムを伸長させた状態（糸ゴムを接合時伸長率と略同じ伸長率で伸長させた状態）で実施した。延伸加工における諸条件は次のとおりである。延伸加工装置における歯溝の噛み合い深さ（図６の符号Ｄに相当する深さ）：１．０ｍｍ、隣接する歯のピッチ（図６の符号Ｐに相当する距離）：２．０ｍｍ、歯の幅（図６の符号Ｗに相当する、延伸加工方向の長さ）：０．５ｍｍ、搬送速度：１５０ｍ／ｍｉｎ。 [Example 1]
The elastic member continuous body 5a ′ was obtained by a method substantially similar to the method for producing the sanitary napkin of the first embodiment, and the elastic member continuous body 5a ′ was stretched. Specifically, four elastic member continuums 15 ′ are stretched through a hot melt adhesive on the belt-like sheet continuum 50 ′ [the elastic member continuum 15 ′ is 1.4 times the natural length. After joining in a stretched state (a state with an elongation rate of 140%)], a stretchable member continuous body 5a ′ shown in FIG. The width L1 (see FIG. 7B) in the width direction (CD) of the elastic member continuous body arrangement portion 53 ′ is 10 mm, and the width L2 in the width direction (CD) of the elastic member continuous body 5a ′ at the time of stretching (see FIG. 7). (See (b)) was 40 mm.
The stretchable member continuous body 5 a ′ was stretched by a pair of tooth gap rolls 80 and 81. The heating temperature of each of the tooth gap rolls 80 and 81 during the drawing process was 90 ° C. The stretching ratio of the stretched portion at each time point after 1, 10 and 30 minutes from the start of operation of the stretching device comprising the pair of tooth gap rolls 80 and 81 was measured by the method described later.
As the belt-like sheet continuous body 50 ′, a spunbonded nonwoven fabric having a basis weight of 30 g / m 2 was used. The constituent fiber of the spunbonded nonwoven fabric was a core-sheath type composite fiber in which the core component was polypropylene, the sheath component was polyethylene, and the content ratio of both components was 50:50. The melting point of the resin constituting the belt-like sheet continuous body 50 ′ was 125 ° C. Four thread rubbers were used as elastic members to be arranged and fixed on the belt-like sheet continuous body 50 ′. As the hot melt adhesive, a styrene-butadiene copolymer having a softening point of 94 ° C. was used. The stretching process of the stretchable member continuous body 5a ′ is a state in which the four rubber threads constituting the stretchable member continuous body 5a ′ are stretched (a state in which the thread rubber is stretched at substantially the same stretch rate as that at the time of joining). It carried out in. Various conditions in the drawing process are as follows. The meshing depth of the tooth gap in the drawing apparatus (depth corresponding to the symbol D in FIG. 6): 1.0 mm, the pitch of adjacent teeth (distance corresponding to the symbol P in FIG. 6): 2.0 mm, Width (corresponding to the symbol W in FIG. 6, the length in the stretching direction): 0.5 mm, the conveyance speed: 150 m / min.

伸縮部材連続体５ａ’の延伸率は、以下のようにして測定した。
先ず、延伸加工前の伸縮部材連続体５ａ’にロールスタンパーによって基準長さ（１００ｍｍ）ごとに予め印をつけておいた。延伸加工装置の運転開始からの経過時間をタイマーで測定し、延伸加工により得られた伸縮ギャザー部材連続体５Ａ’から、運転開始からの前記各時間（以下運転時間という）がそれぞれ経過した時点での被延伸加工部位である切断片を得た。該各切断片は、連続する二つの印を含むように、延伸加工により得られた伸縮ギャザー部材連続体５Ａ’をその幅方向に、３００ｍｍの長手方向長さで切断したものである。各運転時間が経過した時点における被延伸加工部位の特定は、各経過時間の経過ごとに、帯状シート連続体に経過時間を記したテープを貼付し、運転停止後に、各経過時間を示すテープが貼付された部位を回収することで、被延伸加工部位の特定を行った。
また、延伸加工前の伸縮部材連続体５ａ’からも、前記切断片と同様の切断片を切り出した。
各切断片に、図１２に示すように、ロールを介して１００ｇｆの荷重を掛けて、該荷重が掛かった状態における、連続した２つの印の間の、弾性部材に沿う長さ（以下、印間長さという）を測定した。延伸加工前の切断片において測定された印間長さを基準長さＬ０とし、延伸加工後の切断片において測定された印間長さを延伸後長さＬ１とした。
各運転時間に対する延伸率は、下記式によって求めた。
延伸率(％)＝〔（Ｌ１−Ｌ０）／Ｌ０〕×１００ The stretch ratio of the elastic member continuous body 5a ′ was measured as follows.
First, the stretchable member continuum 5a ′ before being stretched was previously marked with a roll stamper for each reference length (100 mm). When the elapsed time from the start of operation of the stretching apparatus is measured with a timer, each time from the start of operation (hereinafter referred to as the operation time) has elapsed from the stretchable gather member continuous body 5A ′ obtained by the stretching process. A cut piece was obtained as a stretched portion of the film. Each of the cut pieces is obtained by cutting the stretchable gather member continuous body 5A ′ obtained by stretching so as to include two continuous marks in the width direction with a longitudinal length of 300 mm. To identify the stretched part at the time when each operation time has elapsed, a tape indicating the elapsed time is affixed to the belt-like continuous sheet for each elapsed time, and the tape indicating each elapsed time after the operation is stopped. The stretched part was specified by collecting the pasted part.
Moreover, the cut piece similar to the said cut piece was cut out also from elastic member continuous body 5a 'before extending | stretching process.
As shown in FIG. 12, a load of 100 gf is applied to each cut piece through a roll, and the length along the elastic member (hereinafter referred to as “mark”) between the two consecutive marks in the state where the load is applied. (Referred to as the inter-space length). The inter-mark length measured in the cut piece before the drawing process was defined as a reference length L0, and the inter-mark length measured in the cut piece after the drawing process was designated as a post-stretching length L1.
The stretch ratio for each operation time was determined by the following formula.
Stretch rate (%) = [(L1-L0) / L0] × 100

〔比較例１〕
伸縮部材連続体５ａ’に常温の歯溝ロールで延伸加工を施し、延伸加工装置の運転開始から１、５、１５、２５分間が経過した時点での被延伸加工部位である切断片を得、歯溝の噛み合い深さを０．７ｍｍに設定した以外は、実施例１と同様にして、各運転時間に対する延伸率を求めた。 [Comparative Example 1]
Stretch processing is performed on the elastic member continuum 5a ′ with a normal tooth gap roll, and a cut piece that is a stretched portion at the time when 1, 5, 15, 25 minutes have elapsed from the start of operation of the stretching device, Except that the mesh depth of the tooth gap was set to 0.7 mm, the stretching ratio for each operation time was determined in the same manner as in Example 1.

実施例１及び比較例１について、各運転時間に対して得られた延伸率を図１３のグラフに示す。図１３において、黒塗りの四角形及び三角形で示した実施例１及び比較例２のプロットにおいては、グラフを見やすくするために、比較例１のプロット位置を、実施例１よりも１分ぶんだけ後ろにずらしてある。比較例１の延伸加工は、運転時間の経過とともに、延伸率が上昇しているのに対し、実施例１の延伸加工は延伸率が安定していることが分かる。また、伸縮ギャザー部材連続体５Ａ’においては、延伸加工による弾性部材連続体１５’の帯状シート連続体５０’からの剥がれは見られなかった。このことから、実施例における吸収性物品の製造方法によれば、伸縮ギャザー部材を有する吸収性物品を安定的に連続生産できると共に、帯状シート連続体５０’からの弾性部材連続体１５’の剥がれも防止できることが分かる。   About Example 1 and Comparative Example 1, the drawing ratio obtained with respect to each operation time is shown in the graph of FIG. In FIG. 13, in the plots of Example 1 and Comparative Example 2 indicated by black squares and triangles, the plot position of Comparative Example 1 is 1 minute behind Example 1 in order to make the graph easier to see. It is shifted. It can be seen that in the stretching process of Comparative Example 1, the stretching ratio increases with the passage of operating time, whereas in the stretching process of Example 1, the stretching ratio is stable. Further, in the stretchable gather member continuous body 5A ', the elastic member continuous body 15' was not peeled off from the belt-like sheet continuous body 50 'due to the stretching process. From this, according to the manufacturing method of the absorbent article in the embodiment, the absorbent article having the stretchable gather member can be stably and continuously produced, and the elastic member continuous body 15 ′ is peeled off from the belt-like sheet continuous body 50 ′. It can be seen that this can also be prevented.

１Ａ，１Ｂ 生理用ナプキン（吸収性物品）
２ 表面シート
３ 裏面シート
４ 吸収体
５Ａ，５Ｂ 防漏壁（伸縮ギャザー部材）
５Ａ’，５Ｂ’ 伸縮ギャザー部材連続体
５ａ’，５ｂ’ 伸縮部材連続体
１０ 吸収性本体
１５ 弾性部材
１５’ 弾性部材連続体
２０，２１ 襞
５０ 帯状シート（防漏壁形成用シート）
５０’ 帯状シート連続体
５１ 基壁部
５３ 弾性部材配置部（面状部、被延伸加工部）
６０Ａ，６０Ｂ，６０Ｃ，６０Ｄ 生理用ナプキンの製造装置
６１，６２，６３ 接着剤の塗工手段
７１，７２，７３，７４，７５ 折り曲げ手段
８０，８１ 歯溝ロール
８２ａ 歯
９１ カットロール
９２ アンビルロール 1A, 1B Sanitary napkin (absorbent article)
2 Top sheet 3 Back sheet 4 Absorber 5A, 5B Leak-proof wall (expandable gather member)
5A ′, 5B ′ Stretchable gather member continuum 5a ′, 5b ′ Stretchable member continuum 10 Absorbent body 15 Elastic member 15 ′ Elastic member continuum 20, 21 襞 50 Band-shaped sheet (sheet for forming a leak-proof wall)
50 'belt-like sheet continuous body 51 base wall part 53 elastic member arrangement | positioning part (plane-shaped part, stretched part to be processed)
60A, 60B, 60C, 60D Sanitary napkin manufacturing apparatus 61, 62, 63 Adhesive coating means 71, 72, 73, 74, 75 Bending means 80, 81 Tooth gap roll 82a Tooth 91 Cut roll 92 Anvil roll

Claims (9)

液保持性の吸収体及び該吸収体の肌当接面側に配置された表面シートを具備する実質的に縦長の吸収性本体と、該吸収性本体の長手方向に沿う両側部それぞれに、長手方向に延びるように配置されて、長手方向に伸縮性を有する伸縮ギャザー部材とを備えた吸収性物品の製造方法であって、
一方向に延びる弾性部材の連続体を、その伸長状態下に、帯状シートの連続体に、ホットメルト接着剤によって接合して、一方向に延びる伸縮部材の連続体を得、
該伸縮部材の連続体を該弾性部材の伸縮方向に伸長させた状態で、該伸縮部材の連続体における該弾性部材の連続体が配置された部分を、それぞれの周面部にロール軸線方向に延びかつ互いに噛み合う歯溝を有する一対の歯溝ロール間に噛み込ませて、該部分に対し、前記弾性部材の伸縮方向に延伸加工を施した伸縮ギャザー部材の連続体を得、
前記伸縮ギャザー部材の連続体を所定長さに切断する工程を有し、
前記伸縮部材の連続体を得る工程では、前記弾性部材の連続体が接合した前記帯状シートの連続体を、該弾性部材の連続体を内包するように幅方向に折り畳み、該折り畳みにより相対した２層の間に該弾性部材の連続体を接合することにより、該帯状シートの連続体の長手方向に沿う両側部が重ね合わされてなる重合部、及び相対向する２層の該帯状シートの連続体間に該弾性部材の連続体を挟持固定してなる、弾性部材連続体配置部が形成された連続体を得、次いで該連続体における該弾性部材連続体配置部を該重合部の一面側に折り曲げ、
前記延伸加工を、幅方向の一部に歯溝が設けられている前記歯溝ロールを加熱した状態で且つ該歯溝ロールの下流側に配されたニップロールの回転速度を、該歯溝ロールの上流側に配された供給ニップロールの回転速度と同じ速度に設定し、前記弾性部材連続体配置部に限定して行う、吸収性物品の製造方法。 A longitudinally long absorbent main body comprising a liquid-retaining absorbent body and a surface sheet disposed on the skin contact surface side of the absorbent body, and a longitudinal side of each side along the longitudinal direction of the absorbent main body. It is a method for producing an absorbent article that is arranged so as to extend in a direction and includes an elastic gather member having elasticity in the longitudinal direction,
A continuous body of elastic members extending in one direction is joined to a continuous body of belt-like sheets under a stretched state by a hot melt adhesive to obtain a continuous body of elastic members extending in one direction,
In a state where the continuum of the elastic members is extended in the expansion / contraction direction of the elastic member, the portion of the continuum of the elastic members where the continuum of the elastic member is disposed extends in the roll axis direction on each peripheral surface portion. And it is made to interpose between a pair of tooth space rolls which have a tooth space which meshes mutually, and obtains a continuum of the expansion and contraction gather member which gave extension processing to the expansion and contraction direction of the elastic member to the portion,
Cutting the continuous body of the stretchable gather members into a predetermined length;
In the step of obtaining the continuous member of the elastic member, the continuous member of the belt-like sheet joined to the continuous member of the elastic member is folded in the width direction so as to enclose the continuous member of the elastic member, and is opposed to the two by the folding. By joining the continuous member of the elastic member between the layers, a superposed portion in which both side portions along the longitudinal direction of the continuous member of the belt-like sheet are overlapped, and a continuous member of the two layers of the belt-like material facing each other To obtain a continuum in which an elastic member continuum arrangement portion is formed by sandwiching and fixing the continuum of elastic members therebetween, and then placing the elastic member continuum arrangement portion in the continuum on one surface side of the overlapping portion Bend,
The stretching process is carried out with the rotational speed of the nip roll disposed on the downstream side of the tooth groove roll in a state where the tooth groove roll provided with a tooth groove in a part of the width direction is heated . A method for manufacturing an absorbent article, which is set to the same speed as the rotation speed of a supply nip roll disposed on the upstream side, and is limited to the elastic member continuous body arrangement portion . 液保持性の吸収体及び該吸収体の肌当接面側に配置された表面シートを具備する実質的に縦長の吸収性本体と、該吸収性本体の長手方向に沿う両側部それぞれに、長手方向に延びるように配置されて、長手方向に伸縮性を有する伸縮ギャザー部材とを備えた吸収性物品の製造方法であって、
一方向に延びる弾性部材の連続体を、その伸長状態下に、帯状シートの連続体に、ホットメルト接着剤によって接合して、一方向に延びる伸縮部材の連続体を得、
該伸縮部材の連続体を該弾性部材の伸縮方向に伸長させた状態で、該伸縮部材の連続体における該弾性部材の連続体が配置された部分を、それぞれの周面部にロール軸線方向に延びかつ互いに噛み合う歯溝を有する一対の歯溝ロール間に噛み込ませて、該部分に対し、前記弾性部材の伸縮方向に延伸加工を施した伸縮ギャザー部材の連続体を得、
前記伸縮ギャザー部材の連続体を所定長さに切断する工程を有し、
前記伸縮部材の連続体を得る工程では、前記弾性部材の連続体が接合した前記帯状シートの連続体を、該帯状シート連続体の長手方向に沿う一側部を幅方向の内方に折り曲げた後、更に該一側部を該幅方向の外方に折り曲げることにより、該弾性部材の連続体を内包するように、該帯状シート連続体をＺ字状に折り曲げて、該折り曲げにより相対した２層の間に該弾性部材の連続体を接合し、次いで該帯状シート連続体における、該弾性部材の連続体が固定された面上に、該弾性部材の連続体に沿って別の弾性部材の連続体を伸長状態で配置・固定し、引き続き、該帯状シート連続体の長手方向に沿う他側部を、幅方向の内方に折り曲げて該一側部に重ね合わせ、両側部の重合部を形成することで、相対向する２層の該帯状シート連続体間に複数本の該弾性部材の連続体を挟持固定してなる、弾性部材連続体配置部が形成された連続体を得、然る後、該連続体における該弾性部材連続体配置部を、該重合部を介して反対側に反転させることによって、該弾性部材連続体配置部を該重合部の上方に位置させ、
前記延伸加工を、幅方向の一部に歯溝が設けられている前記歯溝ロールを加熱した状態で且つ該歯溝ロールの下流側に配されたニップロールの回転速度を、該歯溝ロールの上流側に配された供給ニップロールの回転速度と同じ速度に設定し、前記弾性部材連続体配置部に限定して行う、吸収性物品の製造方法。 A longitudinally long absorbent main body comprising a liquid-retaining absorbent body and a surface sheet disposed on the skin contact surface side of the absorbent body, and a longitudinal side of each side along the longitudinal direction of the absorbent main body. It is a method for producing an absorbent article that is arranged so as to extend in a direction and includes an elastic gather member having elasticity in the longitudinal direction,
A continuous body of elastic members extending in one direction is joined to a continuous body of belt-like sheets under a stretched state by a hot melt adhesive to obtain a continuous body of elastic members extending in one direction,
In a state where the continuum of the elastic members is extended in the expansion / contraction direction of the elastic member, the portion of the continuum of the elastic members where the continuum of the elastic member is disposed extends in the roll axis direction on each peripheral surface portion. And it is made to interpose between a pair of tooth space rolls which have a tooth space which meshes mutually, and obtains a continuum of the expansion and contraction gather member which gave extension processing to the expansion and contraction direction of the elastic member to the portion,
Cutting the continuous body of the stretchable gather members into a predetermined length;
In the step of obtaining the continuous body of the elastic member, the continuous body of the belt-like sheet joined to the continuous body of the elastic member is bent inward in the width direction at one side portion along the longitudinal direction of the continuous belt-like sheet body. Thereafter, the belt-like sheet continuous body is folded in a Z-shape so as to enclose the continuous body of the elastic member by further folding the one side portion outward in the width direction, and 2 The elastic member continuum is joined between the layers, and then another elastic member along the elastic member continuum is formed on the surface of the belt-like sheet continuum on which the elastic member continuum is fixed. The continuous body is placed and fixed in an elongated state, and then the other side portion along the longitudinal direction of the belt-like sheet continuous body is folded inward in the width direction and overlapped with the one side portion, and the overlapping portions on both side portions are overlapped. By forming, between the belt-like sheet continuous body of two layers facing each other A continuous body in which an elastic member continuous body arrangement portion is formed by sandwiching and fixing a plurality of continuous members of the elastic member is obtained, and then the elastic member continuous body arrangement portion in the continuous body is obtained by the polymerization. The elastic member continuous body arrangement part is positioned above the overlapping part by inverting to the opposite side through the part,
The stretching process is carried out with the rotational speed of the nip roll disposed on the downstream side of the tooth groove roll in a state where the tooth groove roll provided with a tooth groove in a part of the width direction is heated . A method for manufacturing an absorbent article, which is set to the same speed as the rotation speed of a supply nip roll disposed on the upstream side, and is limited to the elastic member continuous body arrangement portion . 前記伸縮ギャザー部材の連続体を、前記吸収性物品の他の構成部材の連続体と接合させ、
該接合により得られた前記伸縮ギャザー部材の連続体と前記他の構成部材の連続体との複合体を、所定長さに切断する、請求項１又は２に記載の吸収性物品の製造方法。 The continuum of the stretchable gather member is joined to the continuum of other constituent members of the absorbent article,
The manufacturing method of the absorbent article of Claim 1 or 2 which cut | disconnects the composite_body | complex of the continuous body of the said expansion-contraction gather member obtained by this joining and the continuous body of the said other structural member to predetermined length. 前記伸縮部材の連続体を、前記吸収性物品の他の構成部材の連続体と接合させ、
該接合により得られた前記伸縮部材の連続体と前記他の構成部材の連続体との複合体における前記伸縮部材の連続体に前記延伸加工を施し、
該延伸加工後の前記複合体を所定長さに切断する、請求項１又は２に記載の吸収性物品の製造方法。 The continuum of the elastic members is joined to the continuum of other constituent members of the absorbent article,
The stretching process is performed on the continuum of the stretchable member in the composite body of the continuum of the stretchable member and the continuum of the other constituent members obtained by the joining,
The manufacturing method of the absorbent article of Claim 1 or 2 which cut | disconnects the said composite body after this extending process to predetermined length. 前記帯状シートの連続体として防漏壁形成用シートを用い、
前記伸縮ギャザー部材を用いて、防漏壁を製造する、請求項１ないし４のいずれか一項に記載の吸収性物品の製造方法。 Using a sheet for forming a leak-proof wall as a continuous body of the belt-like sheet,
The manufacturing method of the absorbent article as described in any one of Claims 1 thru | or 4 which manufactures a leak-proof wall using the said expansion-contraction gather member. 液保持性の吸収体及び該吸収体の肌当接面側に配置された表面シートを具備する実質的に縦長の吸収性本体と、該吸収性本体の長手方向に沿う両側部それぞれに、該方向に延びるように配置されて該方向に伸縮性を有する伸縮ギャザー部材と、を備える吸収性物品の製造装置であって、
帯状シートの連続体を搬送経路に沿って搬送する搬送手段と、
弾性部材の連続体を供給する供給手段と、
該帯状シートの連続体及び該弾性部材の連続体のそれぞれにホットメルト接着剤を塗工する塗工手段と、
該帯状シートの連続体を伸長状態の該弾性部材の連続体に合流させ、それにより帯状シートの連続体に弾性部材の連続体を伸長状態で接合させて、伸縮部材の連続体を得る伸縮部材形成手段と、
それぞれの周面部にロール軸線方向に延びかつ互いに噛み合う歯溝を有し、前記伸縮部材の連続体における前記弾性部材の連続体が配置された部分を噛み込んで、該部分に対し、該弾性部材の伸縮方向に延伸加工を施して、伸縮ギャザー部材の連続体を形成する、一対の歯溝ロールと、
該一対の歯溝ロールの下流側に配されたニップロールと、該歯溝ロールの上流側に配された供給ニップロールとを備え、該歯溝ロール間に、前記伸縮部材の連続体を、前記弾性部材の伸縮方向に伸長させつつ供給する伸長供給手段と、を有し、
前記伸縮部材形成手段は、前記弾性部材の連続体が接合した前記帯状シートの連続体を、該弾性部材の連続体を内包するように幅方向に折り畳み、該折り畳みにより相対した２層の間に該弾性部材の連続体を接合することにより、該帯状シートの連続体の長手方向に沿う両側部が重ね合わされてなる重合部、及び相対向する２層の該帯状シートの連続体間に該弾性部材の連続体を挟持固定してなる、弾性部材連続体配置部が形成された連続体を得る第１の折り曲げ手段と、
前記連続体における前記弾性部材連続体配置部を前記重合部の一面側に折り曲げる第２の折り曲げ手段とを備え、
前記歯溝ロールは加熱制御手段を備えているとともに幅方向の一部に歯溝が設けられており、該歯溝ロールの下流側に配された前記ニップロールの回転速度を、該歯溝ロールの上流側に配された前記供給ニップロールの回転速度と同じ速度に設定した状態下に、前記延伸加工を、前記弾性部材連続体配置部に限定して行うように構成されている、吸収性物品の製造装置。 A substantially vertically long absorbent body comprising a liquid-retaining absorbent body and a surface sheet disposed on the skin contact surface side of the absorbent body; and both sides along the longitudinal direction of the absorbent body, A stretchable gathering member arranged to extend in a direction and having stretchability in the direction, and an absorbent article manufacturing apparatus comprising:
Conveying means for conveying a continuous body of belt-shaped sheets along a conveying path;
Supply means for supplying a continuous body of elastic members;
A coating means for applying a hot melt adhesive to each of the continuous body of the belt-like sheet and the continuous body of the elastic member;
A stretchable member that joins the continuous body of the belt-like sheet to the continuous body of the stretched elastic member, and thereby joins the continuous body of the beltlike sheet in a stretched state to the continuous body of the stretchable member to obtain a continuous body of stretchable members. Forming means;
Each peripheral surface portion has a tooth groove that extends in the roll axis direction and meshes with each other, and a portion of the continuum of the elastic members in which the continuum of the elastic member is disposed is bitten into the elastic member. A pair of tooth gap rolls that are stretched in the stretching direction to form a continuous body of stretchable gather members,
A nip roll arranged downstream of the pair of tooth space rolls, and a feed nip rolls disposed on the upstream side of the tooth groove rolls, between the tooth spaces rolls, a continuous body of the elastic member, the elastic Extending supply means for supplying while extending in the expansion and contraction direction of the member,
The elastic member forming means folds the continuous body of the belt-like sheet joined to the continuous body of the elastic member in the width direction so as to enclose the continuous body of the elastic member, and between the two layers opposed by the folding. By joining the continuous member of the elastic member, the elastic portion is formed between the overlapping portion of the belt-like sheet continuous body along the longitudinal direction, and the two continuous layers of the belt-like sheet opposite to each other. A first bending means for obtaining a continuum in which an elastic member continuum arrangement portion is formed, sandwiching and fixing a continuum of members;
Second bending means for bending the elastic member continuum arrangement portion in the continuum to one surface side of the overlapping portion;
The tooth gap roll is provided with a heating control means and a tooth groove is provided in a part of the width direction, and the rotational speed of the nip roll arranged on the downstream side of the tooth groove roll is determined by the rotation speed of the tooth groove roll. The absorbent article is configured so that the stretching process is limited to the elastic member continuous body arrangement portion under a state where the rotational speed of the supply nip roll disposed on the upstream side is set to the same speed . manufacturing device. 所定の方向に伸縮性を有する伸縮ギャザー部材の製造方法であって、
一方向に延びる弾性部材の連続体を、その伸長状態下に、帯状シートの連続体に、ホットメルト接着剤によって接合して、一方向に延びる伸縮部材の連続体を得、
該伸縮部材の連続体を該弾性部材の伸縮方向に伸長させた状態で、該伸縮部材の連続体における該弾性部材の連続体が配置された部分を、それぞれの周面部にロール軸線方向に延びかつ互いに噛み合う歯溝を有する一対の歯溝ロール間に噛み込ませて、該部分に対し、前記弾性部材の伸縮方向に延伸加工を施して、伸縮ギャザー部材の連続体を得、
前記伸縮ギャザー部材の連続体を所定長さに切断する工程を有し、
前記伸縮部材の連続体を得る工程では、前記弾性部材の連続体が接合した前記帯状シートの連続体を、該弾性部材の連続体を内包するように幅方向に折り畳み、該折り畳みにより相対した２層の間に該弾性部材の連続体を接合することにより、該帯状シートの連続体の長手方向に沿う両側部が重ね合わされてなる重合部、及び相対向する２層の該帯状シートの連続体間に該弾性部材の連続体を挟持固定してなる、弾性部材連続体配置部が形成された連続体を得、次いで該連続体における該弾性部材連続体配置部を該重合部の一面側に折り曲げ、
前記延伸加工を、幅方向の一部に歯溝が設けられている前記歯溝ロールを加熱した状態で且つ該歯溝ロールの下流側に配されたニップロールの回転速度を、該歯溝ロールの上流側に配された供給ニップロールの回転速度と同じ速度に設定し、前記弾性部材連続体配置部に限定して行う、伸縮ギャザー部材の製造方法。 A method for producing a stretchable gather member having stretchability in a predetermined direction,
A continuous body of elastic members extending in one direction is joined to a continuous body of belt-like sheets under a stretched state by a hot melt adhesive to obtain a continuous body of elastic members extending in one direction,
In a state where the continuum of the elastic members is extended in the expansion / contraction direction of the elastic member, the portion of the continuum of the elastic members where the continuum of the elastic member is disposed extends in the roll axis direction on each peripheral surface portion. And it is made to bite between a pair of tooth space rolls having tooth spaces that mesh with each other, and for this portion, the elastic member is stretched in the stretching direction to obtain a continuous body of stretchable gather members,
Cutting the continuous body of the stretchable gather members into a predetermined length;
In the step of obtaining the continuous member of the elastic member, the continuous member of the belt-like sheet joined to the continuous member of the elastic member is folded in the width direction so as to enclose the continuous member of the elastic member, and is opposed to the two by the folding. By joining the continuous member of the elastic member between the layers, a superposed portion in which both side portions along the longitudinal direction of the continuous member of the belt-like sheet are overlapped, and a continuous member of the two layers of the belt-like material facing each other To obtain a continuum in which an elastic member continuum arrangement portion is formed by sandwiching and fixing the continuum of elastic members therebetween, and then placing the elastic member continuum arrangement portion in the continuum on one surface side of the overlapping portion Bend,
The stretching process is carried out with the rotational speed of the nip roll disposed on the downstream side of the tooth groove roll in a state where the tooth groove roll provided with a tooth groove in a part of the width direction is heated . A method for producing a stretchable gather member, which is set to the same speed as the rotation speed of a supply nip roll disposed on the upstream side, and is limited to the elastic member continuous body placement portion . 液保持性の吸収体及び該吸収体の肌当接面側に配置された表面シートを具備する実質的に縦長の吸収性本体と、該吸収性本体の長手方向に沿う両側部それぞれに、該方向に延びるように配置されて該方向に伸縮性を有する伸縮ギャザー部材と、を備える吸収性物品の製造装置であって、
帯状シートの連続体を搬送経路に沿って搬送する搬送手段と、
弾性部材の連続体を供給する供給手段と、
該帯状シートの連続体及び該弾性部材の連続体のそれぞれにホットメルト接着剤を塗工する塗工手段と、
該帯状シートの連続体を伸長状態の該弾性部材の連続体に合流させ、それにより帯状シートの連続体に弾性部材の連続体を伸長状態で接合させて、伸縮部材の連続体を得る伸縮部材形成手段と、
それぞれの周面部にロール軸線方向に延びかつ互いに噛み合う歯溝を有し、前記伸縮部材の連続体における前記弾性部材の連続体が配置された部分を噛み込んで、該部分に対し、該弾性部材の伸縮方向に延伸加工を施して、伸縮ギャザー部材の連続体を形成する、一対の歯溝ロールと、
該一対の歯溝ロールの下流側に配されたニップロールと、該歯溝ロールの上流側に配された供給ニップロールとを備え、該歯溝ロール間に、前記伸縮部材の連続体を、前記弾性部材の伸縮方向に伸長させつつ供給する伸長供給手段と、を有し、
前記伸縮部材形成手段は、
前記伸縮部材の連続体を得る工程では、前記弾性部材の連続体が接合した前記帯状シートの連続体を、該帯状シート連続体の長手方向に沿う一側部を幅方向の内方に折り曲げた後、更に該一側部を該幅方向の外方に折り曲げることにより、該弾性部材の連続体を内包するように、該帯状シート連続体をＺ字状に折り曲げて、該折り曲げにより相対した２層の間に該弾性部材の連続体を接合する第１の折り曲げ手段と、
前記帯状シート連続体における、前記弾性部材の連続体が固定された面上に、該弾性部材の連続体に沿って別の弾性部材の連続体を伸長状態で配置・固定し、引き続き、該帯状シート連続体の長手方向に沿う他側部を、幅方向の内方に折り曲げて該一側部に重ね合わせ、両側部の重合部を形成することで、相対向する２層の該帯状シート連続体間に複数本の該弾性部材の連続体を挟持固定してなる、弾性部材連続体配置部が形成された連続体を得る第２の折り曲げ手段と、
前記連続体における前記弾性部材連続体配置部を、前記重合部を介して反対側に反転させることによって、該弾性部材連続体配置部を該重合部の上方に位置させる第３の折り曲げ手段とを備え、
前記歯溝ロールは加熱制御手段を備えているとともに幅方向の一部に歯溝が設けられており、該歯溝ロールの下流側に配された前記ニップロールの回転速度を、該歯溝ロールの上流側に配された前記供給ニップロールの回転速度と同じ速度に設定した状態下に、前記延伸加工を、前記弾性部材連続体配置部に限定して行うように構成されている、吸収性物品の製造装置。 A substantially vertically long absorbent body comprising a liquid-retaining absorbent body and a surface sheet disposed on the skin contact surface side of the absorbent body; and both sides along the longitudinal direction of the absorbent body, A stretchable gathering member arranged to extend in a direction and having stretchability in the direction, and an absorbent article manufacturing apparatus comprising:
Conveying means for conveying a continuous body of belt-shaped sheets along a conveying path;
Supply means for supplying a continuous body of elastic members;
A coating means for applying a hot melt adhesive to each of the continuous body of the belt-like sheet and the continuous body of the elastic member;
A stretchable member that joins the continuous body of the belt-like sheet to the continuous body of the stretched elastic member, and thereby joins the continuous body of the beltlike sheet in a stretched state to the continuous body of the stretchable member to obtain a continuous body of stretchable members. Forming means;
Each peripheral surface portion has a tooth groove that extends in the roll axis direction and meshes with each other, and a portion of the continuum of the elastic members in which the continuum of the elastic member is disposed is bitten into the elastic member. A pair of tooth gap rolls that are stretched in the stretching direction to form a continuous body of stretchable gather members,
A nip roll arranged downstream of the pair of tooth space rolls, and a feed nip rolls disposed on the upstream side of the tooth groove rolls, between the tooth spaces rolls, a continuous body of the elastic member, the elastic Extending supply means for supplying while extending in the expansion and contraction direction of the member,
The elastic member forming means includes
In the step of obtaining the continuous body of the elastic member, the continuous body of the belt-like sheet joined to the continuous body of the elastic member is bent inward in the width direction at one side portion along the longitudinal direction of the continuous belt-like sheet body. Thereafter, the belt-like sheet continuous body is folded in a Z-shape so as to enclose the continuous body of the elastic member by further folding the one side portion outward in the width direction, and 2 First folding means for joining the continuum of elastic members between the layers;
On the surface of the belt-like sheet continuum, another elastic member continuum is placed and fixed along the elastic member continuum on the surface to which the elastic member continuum is fixed. The other side portions along the longitudinal direction of the sheet continuous body are folded inward in the width direction and overlapped on the one side portion to form a superposed portion on both sides, thereby forming two continuous layers of the belt-like sheets facing each other. A second bending means for obtaining a continuous body in which an elastic member continuous body arrangement portion is formed by sandwiching and fixing a continuous body of a plurality of elastic members between the bodies;
A third bending means for positioning the elastic member continuous body arrangement portion above the overlapping portion by inverting the elastic member continuous body arrangement portion of the continuous body to the opposite side via the overlapping portion; Prepared,
The tooth gap roll is provided with a heating control means and a tooth groove is provided in a part of the width direction, and the rotational speed of the nip roll arranged on the downstream side of the tooth groove roll is determined by the rotation speed of the tooth groove roll. The absorbent article is configured so that the stretching process is limited to the elastic member continuous body arrangement portion under a state where the rotational speed of the supply nip roll disposed on the upstream side is set to the same speed . manufacturing device. 所定の方向に伸縮性を有する伸縮ギャザー部材の製造方法であって、
一方向に延びる弾性部材の連続体を、その伸長状態下に、帯状シートの連続体に、ホットメルト接着剤によって接合して、一方向に延びる伸縮部材の連続体を得、
該伸縮部材の連続体を該弾性部材の伸縮方向に伸長させた状態で、該伸縮部材の連続体における該弾性部材の連続体が配置された部分を、それぞれの周面部にロール軸線方向に延びかつ互いに噛み合う歯溝を有する一対の歯溝ロール間に噛み込ませて、該部分に対し、前記弾性部材の伸縮方向に延伸加工を施して、伸縮ギャザー部材の連続体を得、
前記伸縮ギャザー部材の連続体を所定長さに切断する工程を有し、
前記伸縮部材の連続体を得る工程では、前記弾性部材の連続体が接合した前記帯状シートの連続体を、該帯状シート連続体の長手方向に沿う一側部を幅方向の内方に折り曲げた後、更に該一側部を該幅方向の外方に折り曲げることにより、該弾性部材の連続体を内包するように、該帯状シート連続体をＺ字状に折り曲げて、該折り曲げにより相対した２層の間に該弾性部材の連続体を接合し、次いで該帯状シート連続体における、該弾性部材の連続体が固定された面上に、該弾性部材の連続体に沿って別の弾性部材の連続体を伸長状態で配置・固定し、引き続き、該帯状シート連続体の長手方向に沿う他側部を、幅方向の内方に折り曲げて該一側部に重ね合わせ、両側部の重合部を形成することで、相対向する２層の該帯状シート連続体間に複数本の該弾性部材の連続体を挟持固定してなる、弾性部材連続体配置部が形成された連続体を得、然る後、該連続体における該弾性部材連続体配置部を、該重合部を介して反対側に反転させることによって、該弾性部材連続体配置部を該重合部の上方に位置させ、
前記延伸加工を、幅方向の一部に歯溝が設けられている前記歯溝ロールを加熱した状態で且つ該歯溝ロールの下流側に配されたニップロールの回転速度を、該歯溝ロールの上流側に配された供給ニップロールの回転速度と同じ速度に設定し、前記弾性部材連続体配置部に限定して行う、伸縮ギャザー部材の製造方法。 A method for producing a stretchable gather member having stretchability in a predetermined direction,
A continuous body of elastic members extending in one direction is joined to a continuous body of belt-like sheets under a stretched state by a hot melt adhesive to obtain a continuous body of elastic members extending in one direction,
In a state where the continuum of the elastic members is extended in the expansion / contraction direction of the elastic member, the portion of the continuum of the elastic members where the continuum of the elastic member is disposed extends in the roll axis direction on each peripheral surface portion. And it is made to bite between a pair of tooth space rolls having tooth spaces that mesh with each other, and for this portion, the elastic member is stretched in the stretching direction to obtain a continuous body of stretchable gather members,
Cutting the continuous body of the stretchable gather members into a predetermined length;
In the step of obtaining the continuous body of the elastic member, the continuous body of the belt-like sheet joined to the continuous body of the elastic member is bent inward in the width direction at one side portion along the longitudinal direction of the continuous belt-like sheet body. Thereafter, the belt-like sheet continuous body is folded in a Z-shape so as to enclose the continuous body of the elastic member by further folding the one side portion outward in the width direction, and 2 The elastic member continuum is joined between the layers, and then another elastic member along the elastic member continuum is formed on the surface of the belt-like sheet continuum on which the elastic member continuum is fixed. The continuous body is placed and fixed in an elongated state, and then the other side portion along the longitudinal direction of the belt-like sheet continuous body is folded inward in the width direction and overlapped with the one side portion, and the overlapping portions on both side portions are overlapped. By forming, between the belt-like sheet continuous body of two layers facing each other A continuous body in which an elastic member continuous body arrangement portion is formed by sandwiching and fixing a plurality of continuous members of the elastic member is obtained, and then the elastic member continuous body arrangement portion in the continuous body is obtained by the polymerization. The elastic member continuous body arrangement part is positioned above the overlapping part by inverting to the opposite side through the part,
The stretching process is carried out with the rotational speed of the nip roll disposed on the downstream side of the tooth groove roll in a state where the tooth groove roll provided with a tooth groove in a part of the width direction is heated . A method for producing a stretchable gather member, which is set to the same speed as the rotation speed of a supply nip roll disposed on the upstream side, and is limited to the elastic member continuous body placement portion .
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