JP2009148447A

JP2009148447A - Elastic composite sheet and method for producing the same

Info

Publication number: JP2009148447A
Application number: JP2007329659A
Authority: JP
Inventors: Kenji Ando; 賢治安藤; Takuo Yanajima; 拓郎梁島; Kenji Kobayashi; 賢司小林
Original assignee: Kao Corp
Current assignee: Kao Corp
Priority date: 2007-12-21
Filing date: 2007-12-21
Publication date: 2009-07-09
Anticipated expiration: 2027-12-21
Also published as: JP5100359B2

Abstract

PROBLEM TO BE SOLVED: To provide an elastic composite sheet with which flexible and soft gathers having good air permeability and comfortable touch are formed, and also to provide a method for producing the same. SOLUTION: Two sheet materials 2 and 3 are bonded at a plurality of bonding regions 5. The plurality of bonding regions 5 are arranged intermittently in the extending and contracting direction X of elastic members 4 and are also arranged intermittently or continuously in a direction Y perpendicular to the extending and contracting direction X. A plurality of bonding lines 50 and 51 comprising a plurality of bonding regions 5 are formed along the directions X and Y respectively. The plurality of bonding regions 5 has bonded parts 7 where the sheet materials 2 and 3 are bonded and non-bonded parts 8, and the bonded parts and the non-bonded parts are arranged alternatively in at least one of the directions X and Y. The plurality of elastic members 4 are arranged so that each elastic member overlaps the bonded parts 7 at each bonding region 5 and are fixed between the sheet materials 2 and 3 at the bonded parts 7. Each of the two sheet materials 2 and 3 forms pleats 6 between the bonding lines 51 extending along the direction Y. COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は、柔軟で感触が柔らかく、肌触りも良好なギャザーを形成し得る伸縮性複合シート及びその製造方法に関する。 The present invention relates to a stretchable composite sheet that can form a gather that is flexible, soft to the touch, and has a good touch, and a method for producing the same.

使い捨ておむつ、生理用ナプキン等の吸収性物品においては、シート材に弾性部材を伸長状態で接合し、その弾性部材を収縮させて該シート材にギャザー（多数の襞を有する伸縮部）を形成させることが広く行われている。 In an absorbent article such as a disposable diaper and a sanitary napkin, an elastic member is joined to a sheet material in an expanded state, and the elastic member is contracted to form a gather (an elastic part having a large number of wrinkles) on the sheet material. It is widely done.

特許文献１には、平坦なシート材料を折り曲げて山と谷を繰り返す多数の襞を形成し、弾性部材を襞の複数の山の頂部に接合してなる弾性伸縮性のシートが開示されている。
また、特許文献２には、不織布製のシート材と該シート材を折り返して形成した２層部分に挟まれた弾性部材とを有する弾性伸縮部であって、該弾性部材の伸縮方向に直交する方向に延びるシート材同士の線状の接合部分を有し、該接合部分において該弾性部材を前記シート材に接合してなる弾性伸縮部を備えた使い捨ておむつが記載されている。 Patent Document 1 discloses an elastic stretchable sheet formed by bending a flat sheet material to form a large number of ridges that repeat peaks and valleys, and joining elastic members to the tops of a plurality of peaks of the ridges. .
Patent Document 2 discloses an elastic stretch part having a sheet material made of nonwoven fabric and an elastic member sandwiched between two layers formed by folding the sheet material, and is orthogonal to the stretch direction of the elastic member. A disposable diaper having a linear joint portion between sheet materials extending in a direction and having an elastic stretchable portion formed by joining the elastic member to the sheet material at the joint portion is described.

特開２００１−１１７６９号公報JP 2001-11769 A 実用新案登録第２５１８９５３号公報Utility Model Registration No. 2518953

しかし、特許文献１記載のシートにおいては、襞が複数本の前記弾性部材に亘っており、比較的見た目に美しいものではあるが、その一方で、襞の山の頂部が鋭角に形成されて尖っているため、襞が肌に接触したときの感触があまりよくない。
他方、特許文献２記載の弾性伸縮部においては、シート材同士の線状の接合部分に起因して、その接合部分と平行な方向の柔軟性が劣り、肌に接触したときの柔らかさや感触の点において改善の余地がある。 However, in the sheet described in Patent Document 1, the ridge extends over a plurality of the elastic members and is relatively beautiful. On the other hand, the top of the ridge is formed with an acute angle and is sharp. Therefore, the touch when the heel touches the skin is not so good.
On the other hand, in the elastic expansion and contraction part described in Patent Document 2, due to the linear joining part between the sheet materials, the flexibility in the direction parallel to the joining part is inferior, and the softness and touch when touching the skin are poor. There is room for improvement.

従って、本発明の目的は、柔軟で感触が柔らかく、肌触りが良好なギャザーを形成し得る伸縮性複合シート及びその製造方法を提供することにある。 Accordingly, an object of the present invention is to provide a stretchable composite sheet that can form a gather that is flexible, soft to the touch, and has a good touch, and a method for producing the same.

本発明は、２枚のシート材と、これら両シート材間に配された複数本の弾性部材とからなる伸縮性複合シートであって、前記２枚のシート材は、複数の接合領域にて接合されており、該複数の接合領域は、前記弾性部材の伸縮方向に間欠的に配されていると共に、該伸縮方向と直交する直交方向に間欠的又は連続的に配されており、該伸縮方向及び該直交方向の両方向に沿って、それぞれ複数の該接合領域からなる接合ラインが複数本形成されており、前記複数の接合領域それぞれは、前記２枚のシート材が接合されている接合部と、該シート材が接合されていない非接合部とを有しており、該接合部及び該非接合部が、前記伸縮方向及び前記直交方向のうちの少なくとも一方向に交互に配されており、前記複数本の弾性部材それぞれは、前記伸縮方向に沿う接合ラインを構成する各前記接合領域において前記接合部と重なるように配されて、該接合部において前記２枚のシート材間に固定されており、前記２枚のシート材それぞれが、前記直交方向に沿う接合ライン同士間において襞を形成している伸縮性複合シートを提供することにより、前記目的を達成したものである。 The present invention is an elastic composite sheet comprising two sheet materials and a plurality of elastic members disposed between the two sheet materials, wherein the two sheet materials are formed in a plurality of joining regions. The plurality of joining regions are intermittently disposed in the expansion / contraction direction of the elastic member, and are intermittently or continuously disposed in an orthogonal direction orthogonal to the expansion / contraction direction. A plurality of joining lines each formed of a plurality of the joining regions are formed along both the direction and the orthogonal direction, and each of the joining regions is joined to the two sheet materials. And a non-joined portion to which the sheet material is not joined, and the joined portion and the non-joined portion are alternately arranged in at least one direction of the stretch direction and the orthogonal direction, Each of the plurality of elastic members In each of the joining regions constituting the joining line along the expansion / contraction direction, it is arranged so as to overlap the joining portion, and is fixed between the two sheet materials at the joining portion, and each of the two sheet materials is The object is achieved by providing a stretchable composite sheet in which wrinkles are formed between joining lines along the orthogonal direction.

また本発明は、前記伸縮性複合シートの製造方法であって、搬送中の第１シート連続体の一面に、接着剤塗布手段により接着剤を前記接合領域の配置パターンで塗布して複数の接着剤塗布部を形成する工程と、複数本の弾性部材を前記接着剤塗布部と重なるように前記第１シート連続体の一面上に伸長状態で配置する工程と、前記第１シート連続体の一面上に、該第１シート連続体とは別体の第２シート連続体を重ね合わせる工程とを備え、前記接着剤塗布手段が、接着剤の塗布時に前記第１シート連続体の一面にそのロール外周面が当接される塗布ロールを具備しており、該塗布ロールを該第１シート連続体の搬送速度と同速度で周方向に回転させつつ、該ロール外周面を該一面に当接させた状態で該ロール外周面から該一面上に接着剤を供給することにより、前記複数の接着剤塗布部を前記配置パターンで形成する伸縮性複合シートの製造方法を提供するものである。 Further, the present invention is a method for producing the stretchable composite sheet, wherein a plurality of adhesives are applied by applying an adhesive in an arrangement pattern of the joining region to one surface of the first continuous sheet being conveyed by an adhesive application unit. A step of forming an agent application portion, a step of arranging a plurality of elastic members in an extended state on one surface of the first sheet continuum so as to overlap the adhesive application portion, and one surface of the first sheet continuum And a step of superimposing a second sheet continuum separate from the first sheet continuum, wherein the adhesive application means rolls the roll onto one surface of the first sheet continuum during application of the adhesive. An outer peripheral surface is provided with an applicator roll, and the outer peripheral surface of the roll is brought into contact with the one surface while rotating the applicator roll in the circumferential direction at the same speed as the conveying speed of the first continuous sheet. In this state, the adhesive is applied on the one surface from the outer peripheral surface of the roll. By feeding, there is provided a method for producing a stretchable composite sheet which forms a plurality of adhesive application portions in the arrangement pattern.

また本発明は、前記伸縮性複合シートを用いた吸収性物品及び着用物品を提供するものである。 Moreover, this invention provides the absorbent article and wearing article using the said elastic composite sheet.

本発明の伸縮性複合シートは、柔軟で感触が柔らかく、肌触りが良好なギャザー（多数の襞を有する伸縮部）を有しており、吸収性物品及び着用物品等にそのようなギャザーを形成することができる。また、この多数の襞は整然と成形されており、視覚的にも優れたギャザーを形成することができる。
また、本発明の伸縮性複合シートの製造方法によれば、前記特長を有する伸縮性複合シートを容易に製造することができる。
また、本発明の吸収性物品及び着用物品によれば、その形成材料として前記特長を有する伸縮性複合シートを用いているため、特に該伸縮性複合シートが用いられている部位において、肌触りが良好であり、良好な装着感が得られる。 The stretchable composite sheet of the present invention has a gather (a stretchable part having a large number of wrinkles) that is soft and soft to the touch, and forms such gathers on absorbent articles and worn articles. be able to. Further, the large number of ridges are formed in an orderly manner, and a visually excellent gather can be formed.
Moreover, according to the manufacturing method of the elastic composite sheet of this invention, the elastic composite sheet which has the said characteristic can be manufactured easily.
Further, according to the absorbent article and the worn article of the present invention, since the stretchable composite sheet having the above-mentioned features is used as the forming material, the touch is good particularly in the part where the stretchable composite sheet is used. And a good wearing feeling can be obtained.

以下、本発明をその好ましい実施形態に基づき図面を参照しながら説明する。
本発明の第１実施形態としての伸縮性複合シート１は、図１及び図２に示すように、２枚のシート材２，３と、これら両シート材２，３間に配された複数本の弾性部材４とからなる。
伸縮性複合シート１は、平面視して矩形形状を有しており、弾性部材４が延びる方向の両端部には、端部シール部１１（一方のみ図示）が、弾性部材４の伸縮方向Ｘ（延在方向）と直交する直交方向Ｙに連続的に形成されており、端部シール部１１においては、全ての弾性部材４が両シート材２，３に挟まれた状態で固定されている。伸縮性複合シート１は、端部シール部１１を除く部分が伸縮部となっている。 Hereinafter, the present invention will be described based on preferred embodiments with reference to the drawings.
As shown in FIGS. 1 and 2, the stretchable composite sheet 1 as the first embodiment of the present invention includes two sheet materials 2 and 3 and a plurality of sheets disposed between the two sheet materials 2 and 3. The elastic member 4.
The stretchable composite sheet 1 has a rectangular shape in plan view, and end seal portions 11 (only one is shown) are provided at both ends in the direction in which the elastic member 4 extends. It is continuously formed in the orthogonal direction Y orthogonal to the (extending direction), and in the end seal portion 11, all the elastic members 4 are fixed in a state of being sandwiched between both sheet materials 2 and 3. . The stretchable composite sheet 1 has a stretchable portion excluding the end seal portion 11.

第１実施形態における複数本の弾性部材４は、互いに平行に配されている。第１実施形態のように複数本の弾性部材４が互いに平行に配されている場合における該弾性部材４の伸縮方向は、該弾性部材４が延びる方向と同じ方向である。また、複数本の弾性部材４が互いに平行に配されていない場合における該弾性部材４の伸縮方向は、後述する襞６が延びる方向に直交する方向である。 The plurality of elastic members 4 in the first embodiment are arranged in parallel to each other. When a plurality of elastic members 4 are arranged in parallel to each other as in the first embodiment, the expansion / contraction direction of the elastic member 4 is the same direction as the direction in which the elastic member 4 extends. In addition, when the plurality of elastic members 4 are not arranged in parallel to each other, the expansion / contraction direction of the elastic member 4 is a direction orthogonal to a direction in which a flange 6 described later extends.

２枚のシート材２，３は、図２に示すように、複数の接合領域５にて接合されている。複数の接合領域５は、弾性部材４の伸縮方向Ｘに間欠的に配されていると共に、該伸縮方向Ｘと直交する直交方向Ｙに間欠的に配されており、伸縮方向Ｘ及び直交方向Ｙの両方向に沿って、それぞれ複数の接合領域５からなる接合ライン５０，５１が複数本形成されている。 As shown in FIG. 2, the two sheet materials 2 and 3 are joined at a plurality of joining regions 5. The plurality of joining regions 5 are intermittently arranged in the expansion / contraction direction X of the elastic member 4 and are also intermittently arranged in the orthogonal direction Y orthogonal to the expansion / contraction direction X. A plurality of joining lines 50 and 51 each consisting of a plurality of joining regions 5 are formed along both directions.

詳述すると、２枚のシート材２，３は、図２に示すように、弾性部材４の伸縮方向Ｘに間欠的に配された複数の接合領域５、及び該伸縮方向Ｘと直行する直交方向Ｙに間欠的に配された複数の接合領域５にて接合されている。
伸縮性複合シート１には、伸縮方向Ｘに、それぞれ複数の接合領域５からなる接合ライン５０（１本のみ符号を付して図示）が複数本形成されており、また、直交方向Ｙに、それぞれ複数の接合領域５からなる接合ライン５１（１本のみ符号を付して図示）が複数本形成されている。 More specifically, as shown in FIG. 2, the two sheet materials 2 and 3 include a plurality of joining regions 5 intermittently arranged in the expansion / contraction direction X of the elastic member 4, and an orthogonal direction orthogonal to the expansion / contraction direction X. Joined by a plurality of joining regions 5 arranged intermittently in the direction Y.
In the stretchable composite sheet 1, a plurality of joining lines 50 (only one is indicated by a reference numeral) each formed of a plurality of joining regions 5 in the stretching direction X are formed, and in the orthogonal direction Y, A plurality of joining lines 51 (only one is denoted by a reference numeral) each including a plurality of joining regions 5 are formed.

弾性部材４の伸縮方向Ｘに沿う接合ライン５０同士は、互いに平行に形成されており、直交方向Ｙに沿う接合ライン５１同士も、互いに平行に形成されている。そして、伸縮方向Ｘに沿う２つの接合ライン５０同士間には、第１接合領域５が存在しない領域が、伸縮性複合シート１の両端部の端部シール部１１（一方のみ図示）間に亘って連続的に形成されている The joining lines 50 along the expansion / contraction direction X of the elastic member 4 are formed in parallel with each other, and the joining lines 51 along the orthogonal direction Y are also formed in parallel with each other. And the area | region where the 1st joining area | region 5 does not exist between the two joining lines 50 along the expansion-contraction direction X spans between the edge part seal parts 11 (only one is shown) of the both ends of the elastic composite sheet 1. FIG. Are continuously formed

柔軟性及び通気性を向上させる観点から、第１実施形態のように複数の接合領域５が弾性部材４の伸縮方向Ｘと直交する直交方向Ｙに間欠的に配されている場合、該直交方向Ｙに沿う接合ライン５１（直交方向に沿って延びる接合ライン）における、接合領域５の配置ピッチＰ１（図１参照）は、好ましくは２〜５０ｍｍ、更に好ましくは２〜２５ｍｍである。
また、同様の観点から、接合領域５の前記直交方向Ｙに沿った長さＬ１（図１参照）は、好ましくは０．５〜３０ｍｍ、更に好ましくは１〜１５ｍｍである。
また、接合領域５の配置ピッチＰ１と接合領域５の長さＬ１との比（Ｐ１／Ｌ１）は、好ましくは１．０１〜８０、更に好ましくは１．０５〜１５である。 From the viewpoint of improving flexibility and air permeability, when the plurality of joining regions 5 are intermittently arranged in the orthogonal direction Y orthogonal to the expansion / contraction direction X of the elastic member 4 as in the first embodiment, the orthogonal direction The arrangement pitch P1 (see FIG. 1) of the joining regions 5 in the joining line 51 (joining line extending along the orthogonal direction) along Y is preferably 2 to 50 mm, and more preferably 2 to 25 mm.
From the same viewpoint, the length L1 (see FIG. 1) along the orthogonal direction Y of the bonding region 5 is preferably 0.5 to 30 mm, and more preferably 1 to 15 mm.
Further, the ratio (P1 / L1) between the arrangement pitch P1 of the bonding region 5 and the length L1 of the bonding region 5 is preferably 1.01 to 80, and more preferably 1.05 to 15.

襞６、特に複数本の弾性部材４に亘って連続して延びる、見た目に美しい襞６を形成させる観点から、弾性部材４の伸縮方向Ｘに沿う接合ライン５０における、接合領域５の配置ピッチＰ２（図1参照）は、好ましくは１〜３０ｍｍ、更に好ましくは１．５〜２０ｍｍである。
また、同様の観点から、接合領域５の前記伸縮方向Ｘに沿った長さＬ２（図１参照）は、好ましくは０．１〜５ｍｍ、更に好ましくは０．２〜１．５ｍｍである。
また、接合領域５の配置ピッチＰ２と接合領域５の長さＬ２との比（Ｐ２／Ｌ２）は、好ましくは１．１〜２００、更に好ましくは２〜５０である。 From the viewpoint of forming a visually pleasing ridge 6 that extends continuously over the ridges 6, particularly the plurality of elastic members 4, the arrangement pitch P 2 of the bonding regions 5 in the bonding line 50 along the expansion / contraction direction X of the elastic members 4. (Refer FIG. 1) becomes like this. Preferably it is 1-30 mm, More preferably, it is 1.5-20 mm.
Further, from the same viewpoint, the length L2 (see FIG. 1) of the joining region 5 along the expansion / contraction direction X is preferably 0.1 to 5 mm, and more preferably 0.2 to 1.5 mm.
Moreover, the ratio (P2 / L2) between the arrangement pitch P2 of the bonding region 5 and the length L2 of the bonding region 5 is preferably 1.1 to 200, more preferably 2 to 50.

複数の接合領域５それぞれは、図３に示すように、２枚のシート材２，３が接合されている接合部７と、該シート材２，３が接合されていない非接合部８とを有しており、接合部７及び非接合部８が、弾性部材４の伸縮方向Ｘ及びその直交方向Ｙのうちの少なくとも一方向に交互に配されている。第１実施形態においては、複数の接合部７及び複数の非接合部８は、伸縮方向Ｘ及び直交方向Ｙの両方向に交互に配されている。
接合部７は、ホットメルト接着剤等の接着剤の塗布部からなる。つまり、２枚のシート材２，３を接合している複数の接合領域５それぞれは、両方向Ｘ，Ｙそれぞれに接着剤を間欠的に塗布することにより構成されている。
第１実施形態における接合領域５は、平面視で矩形形状を有し、該接合領域５を構成する各接合部７は、平面視で円形形状のドット状に形成されている。このように、第１実施形態における接合領域５は、矩形形状の領域内に両方向Ｘ，Ｙそれぞれに間欠的に配された複数のドット状の接合部７の集合体からなる。複数の接合領域５は、何れも同一形状、同一寸法である。 As shown in FIG. 3, each of the plurality of joining regions 5 includes a joining portion 7 where two sheet materials 2 and 3 are joined and a non-joining portion 8 where the sheet materials 2 and 3 are not joined. The joining portions 7 and the non-joining portions 8 are alternately arranged in at least one of the expansion / contraction direction X and the orthogonal direction Y of the elastic member 4. In the first embodiment, the plurality of joint portions 7 and the plurality of non-joint portions 8 are alternately arranged in both the expansion / contraction direction X and the orthogonal direction Y.
The joining part 7 consists of an application part of adhesives, such as a hot-melt-adhesive. That is, each of the joining regions 5 joining the two sheet materials 2 and 3 is configured by intermittently applying an adhesive in both directions X and Y.
The joint region 5 in the first embodiment has a rectangular shape in plan view, and each joint portion 7 constituting the joint region 5 is formed in a circular dot shape in plan view. Thus, the joining area | region 5 in 1st Embodiment consists of an aggregate | assembly of the some dot-shaped junction part 7 distribute | arranged intermittently in each of both directions X and Y within the rectangular-shaped area | region. The plurality of joining regions 5 have the same shape and the same dimensions.

このように、シート材２，３間を接合する接合領域として、図３に示す如き、所定方向に間欠的に配された複数の接合部７の集合体からなる接合領域５を採用することにより、その領域全体に接着剤が塗布（いわゆるベタ塗り）されてなる接合領域５´（図４参照）を採用した場合に比して、シート材間の接合強度を実用上充分なレベルに維持しつつ、接合領域５におけるシートの柔軟性及び通気性を高めることができ、これにより、感触が柔らかく、肌触り及び通気性の良好な伸縮性複合シート１が得られる。また、図３に示す如き接合領域５の採用により、図４に示す如きベタ塗りの接合領域５´を採用した場合に比して、接着剤の塗布量を低減することができ、製造コストの低減を図ることができる。 As described above, by adopting a joining region 5 formed of an assembly of a plurality of joints 7 arranged intermittently in a predetermined direction as shown in FIG. 3 as a joining region for joining the sheet materials 2 and 3. The bonding strength between the sheet materials is maintained at a practically sufficient level as compared with the case where a bonding region 5 ′ (see FIG. 4) in which an adhesive is applied to the entire region (so-called solid coating) is employed. On the other hand, the flexibility and breathability of the sheet in the joining region 5 can be enhanced, and thereby the stretchable composite sheet 1 having a soft feel and good touch and breathability can be obtained. Further, the use of the bonding region 5 as shown in FIG. 3 makes it possible to reduce the amount of adhesive applied compared to the case of using the solid-coated bonding region 5 ′ as shown in FIG. Reduction can be achieved.

柔軟性及び通気性を向上させる観点から、弾性部材４の伸縮方向Ｘと直交する直交方向Ｙに沿う接合ライン５１における、接合部７の配置ピッチＰ３（図３参照）は、好ましくは０．３〜１０ｍｍ、更に好ましくは０．５〜５ｍｍである。
また、同様の観点から、弾性部材４の伸縮方向Ｘに沿う接合ライン５０における、小接合部７の配置ピッチＰ４（図３参照）は、好ましくは０．３〜５ｍｍ、更に好ましくは０．５〜３ｍｍである。
また、同様の観点から、ドット状の接合部７の直径Ｒ（図３参照、小接合部７の平面視における形状が非円形の場合は同一面積の円の直径）は、好ましくは０．5〜７ｍｍ、更に好ましくは０．５〜５ｍｍである。
また、接合部７の配置ピッチＰ３と接合部７の直径Ｒとの比（Ｐ３／Ｒ）は、好ましくは１〜１０、更に好ましくは１．１〜５であり、接合部７の配置ピッチＰ４と接合部７の直径Ｒとの比（Ｐ４／Ｒ）は、好ましくは１〜１０、更に好ましくは１．１〜５である。 From the viewpoint of improving flexibility and air permeability, the arrangement pitch P3 (see FIG. 3) of the joint portions 7 in the joint line 51 along the orthogonal direction Y orthogonal to the expansion / contraction direction X of the elastic member 4 is preferably 0.3. -10 mm, more preferably 0.5-5 mm.
From the same viewpoint, the arrangement pitch P4 (see FIG. 3) of the small joints 7 in the joint line 50 along the expansion / contraction direction X of the elastic member 4 is preferably 0.3 to 5 mm, more preferably 0.5. ~ 3mm.
Further, from the same viewpoint, the diameter R of the dot-like joint portion 7 (see FIG. 3, the diameter of a circle having the same area when the shape of the small joint portion 7 in plan view is non-circular) is preferably 0.5. -7 mm, more preferably 0.5-5 mm.
Further, the ratio (P3 / R) between the arrangement pitch P3 of the joint 7 and the diameter R of the joint 7 is preferably 1 to 10, more preferably 1.1 to 5, and the arrangement pitch P4 of the joint 7 The ratio (P4 / R) to the diameter R of the joint portion 7 is preferably 1 to 10, more preferably 1.1 to 5.

また、柔軟性及び通気性を向上させる観点から、接合領域５における接着剤の塗布量（１つの接合領域５に含まれている全ての接合部７の接着剤塗布量の合計）は、好ましくは０．５〜５０ｇ／ｍ²、更に好ましくは２〜３０ｇ／ｍ²である。
また、同様の観点から、１つの接合部７における接着剤の塗布量は、好ましくは１〜１００ｇ／ｍ²、更に好ましくは５〜７０ｇ／ｍ²である。 Further, from the viewpoint of improving flexibility and air permeability, the amount of adhesive applied in the bonding region 5 (the total amount of adhesive applied to all the bonding portions 7 included in one bonding region 5) is preferably 0.5 to 50 g / m ² , more preferably ² to 30 g / m ² .
From the same viewpoint, the coating amount of the adhesive in one joint 7 is preferably 1 to 100 g / m ^2, more preferably at 5 to 70 g / m ^2.

尚、上述した各部の寸法や比は、図２に示すように、伸縮性複合シート１を、弾性部材４を伸張させて平面状に拡げた状態（弾性部材４を切断する等により該弾性部材４の影響を一切排除した状態で平面状に広げた場合と同じ寸法まで拡げた状態）において測定する。 As shown in FIG. 2, the dimensions and ratios of the respective parts described above are such that the elastic composite sheet 1 is expanded in a flat shape by stretching the elastic member 4 (by cutting the elastic member 4 or the like). In a state where the influence of 4 has been eliminated at all, the dimensions are expanded to the same dimensions as when expanded in a plane.

第１実施形態においては、図２及び図３に示すように、複数本の弾性部材４それぞれは、弾性部材４の伸縮方向Ｘに沿う接合ライン５０を構成する各接合領域５において接合部７と重なるように配されて、各接合部７において２枚のシート材２，３間に固定されている。各弾性部材４は、その伸縮方向Ｘと直交する直交方向Ｙにおいて接合領域５の略中央部を通っており、各接合領域５において切断されることなく、各接合領域５の構成要素である接合部７において２枚のシート材２，３間に固定されている。第１実施形態においては、複数の接合領域５は何れも弾性部材４と重なっている。また、本実施形態においては、１つの接合領域５と重なる弾性部材４の本数は１本であるが、該本数は複数本であっても良く、即ち、１つの接合領域５上に複数本の弾性部材４が存在していてもよい。 In the first embodiment, as shown in FIGS. 2 and 3, each of the plurality of elastic members 4 is connected to the joint 7 in each joint region 5 that constitutes a joint line 50 along the expansion / contraction direction X of the elastic member 4. It arrange | positions so that it may overlap, and it fixes between the two sheet | seat materials 2 and 3 in each junction part 7. FIG. Each elastic member 4 passes through substantially the center of the bonding region 5 in the orthogonal direction Y orthogonal to the expansion / contraction direction X, and is not cut in each bonding region 5 and is a component of each bonding region 5. The part 7 is fixed between the two sheet materials 2 and 3. In the first embodiment, all of the plurality of joining regions 5 overlap with the elastic member 4. In the present embodiment, the number of elastic members 4 that overlap with one joining region 5 is one, but the number may be plural, that is, a plurality of elastic members 4 on one joining region 5. The elastic member 4 may exist.

第１実施形態の伸縮性複合シート１においては、その自然状態（外力を加えない状態）において、弾性部材４が収縮して、図１に示すように、２枚のシート材２，３のそれぞれが、弾性部材４の伸縮方向Ｘと直交する直交方向Ｙに沿う接合ライン５１，５１同士間において襞６，６・・を形成している。 In the elastic composite sheet 1 of the first embodiment, the elastic member 4 contracts in its natural state (a state in which no external force is applied), and each of the two sheet materials 2 and 3 as shown in FIG. However, between the joining lines 51 and 51 along the orthogonal direction Y orthogonal to the expansion-contraction direction X of the elastic member 4, ridges 6, 6,.

２枚のシート材２，３の各襞６は、伸縮性複合シート１の両面にそれぞれ突出するように形成されており、各襞６の突出方向の先端部は、断面円弧状の凸曲面を形成している。各襞６は、弾性部材４と重なる箇所において分断されることなく、前記直交方向Ｙにおいて、各々複数本の弾性部材４間に亘るように連続的に延びているため、見た目に非常に美しい。整然と成形されたきれいな襞６を得る観点から、弾性部材４は、直交方向Ｙに延びる複数本の接合ライン５１それぞれにおいて、２枚のシート材２，３間に固定されていることが好ましい。 The ridges 6 of the two sheet materials 2 and 3 are formed so as to protrude from both surfaces of the stretchable composite sheet 1, and the leading ends of the ridges 6 in the protruding direction have a convex curved surface having an arcuate cross section. Forming. Since each of the flanges 6 extends continuously so as to extend between each of the plurality of elastic members 4 in the orthogonal direction Y without being divided at a portion overlapping with the elastic member 4, it is very beautiful in appearance. From the standpoint of obtaining neatly shaped beautiful ridges 6, the elastic member 4 is preferably fixed between the two sheet materials 2 and 3 in each of a plurality of joining lines 51 extending in the orthogonal direction Y.

第１実施形態の伸縮性複合シート１は、弾性部材４が、その伸縮方向Ｘに沿う接合ライン５０を構成する各接合領域５の接合部７において２枚のシート材２，３間に固定されているため、弾性部材４の収縮応力は各接合領域５間の両シート材２，３を確実に収縮させるために使われるため、各部に形成される襞６を容易に均質化することができ、その均質性が損なわれない。しかも、弾性部材４の伸縮方向Ｘと直交する直交方向Ｙに沿う接合ライン５１が、間欠配置された複数の接合領域５（接合部７）からなるため、伸縮性複合シート１が非常に柔軟であり、例えば伸縮性複合シート１を直交方向Ｙに圧縮する力や、該伸縮性複合シート１を同方向に湾曲させたりする力に対して、伸縮性複合シート１が柔軟に変形する。そのため、例えば、吸収性物品にギャザー（多数の襞を有する伸縮部）、特に立体ギャザー（起立した防漏壁）を形成するために用いた場合に、ギャザーが肌に接触した場合の感触が柔らかく良好であり、ギャザーが肌に与える刺激も低減することができる。 In the stretchable composite sheet 1 of the first embodiment, the elastic member 4 is fixed between the two sheet materials 2 and 3 at the joint portion 7 of each joint region 5 constituting the joint line 50 along the stretch direction X. Therefore, since the contraction stress of the elastic member 4 is used to reliably contract both the sheet materials 2 and 3 between the bonding regions 5, the ridges 6 formed in each part can be easily homogenized. , Its homogeneity is not impaired. Moreover, since the joining line 51 along the orthogonal direction Y orthogonal to the elastic direction X of the elastic member 4 is composed of a plurality of intermittently arranged joining regions 5 (joining portions 7), the elastic composite sheet 1 is very flexible. Yes, for example, the elastic composite sheet 1 is flexibly deformed with respect to a force for compressing the elastic composite sheet 1 in the orthogonal direction Y and a force for bending the elastic composite sheet 1 in the same direction. Therefore, for example, when used to form a gather (a stretchable part having a large number of wrinkles), particularly a three-dimensional gather (an upstanding leak-proof wall) on an absorbent article, the touch when the gather contacts the skin is soft. It is good, and the irritation that the gather gives to the skin can also be reduced.

また、第１実施形態の伸縮性複合シート１は、弾性部材４が、一方のシート材２における襞６と襞６との間の谷部と他方のシート材３における襞６と襞６との間の谷部との間に挟まれた状態で存在すること、及び、襞６の先端が凸曲面を形成していることにより、シート材の厚み方向にボリュームが出るとともに、伸縮性複合シート１の表面に触れたときの感触が極めて柔らかく、肌触りが極めて良好である。 In the elastic composite sheet 1 of the first embodiment, the elastic member 4 includes a trough between the flange 6 and the flange 6 in one sheet material 2 and the flange 6 and the flange 6 in the other sheet material 3. The volume of the sheet material is increased in the thickness direction of the sheet material due to the fact that it is sandwiched between the valleys and the tip of the ridge 6 forms a convex curved surface, and the elastic composite sheet 1 The touch when touching the surface is extremely soft and the touch is very good.

第１実施形態の伸縮性複合シート１の形成材料について説明する。
前記シート材２，３としては、それぞれ、例えばエアースルー不織布、ヒートロール不織布、スパンレース不織布、スパンボンド不織布、メルトブローン不織布等の各種製法による不織布、織布、編布、紙、樹脂フィルム等、及びこれら２以上を積層一体化させてなるシート材等を用いることができる。
見た目に美しく、感触の良い柔軟な襞を形成させる観点から、２枚のシート材２，３又は一方のシート材（特に伸縮性複合シートを肌に当接させる用途に用いる場合の肌側の面を形成するシート材）の形成材料は、エアースルー不織布、ヒートロール不織布、スパンレース不織布、スパンボンド不織布、メルトブローン不織布等であることが好ましい。 The forming material of the elastic composite sheet 1 of the first embodiment will be described.
As the sheet materials 2 and 3, for example, air-through nonwoven fabric, heat roll nonwoven fabric, spunlace nonwoven fabric, spunbond nonwoven fabric, non-woven fabric by various production methods such as melt blown nonwoven fabric, woven fabric, knitted fabric, paper, resin film, etc. A sheet material obtained by laminating and integrating two or more of these can be used.
From the viewpoint of forming a flexible wrinkle that looks beautiful and feels well, two sheet materials 2, 3 or one sheet material (especially the skin side surface when used for the purpose of contacting the elastic composite sheet to the skin) The forming material of the sheet material) is preferably an air-through nonwoven fabric, a heat roll nonwoven fabric, a spunlace nonwoven fabric, a spunbond nonwoven fabric, a meltblown nonwoven fabric or the like.

襞６は、弾性部材４の収縮により２枚のシ−ト材２，３を変形させて生じさせる。そのため、このシート材２，３の剛性が伸縮性複合シート１の襞の成形性・クッション性を決める重要な要素となる。剛性はシート材料の座屈強度によって表すことができる。本発明に用いられる不織布の座屈強度は１００ｃＮ以下、特に７０ｃＮ以下であることが好ましい。ここで、座屈強度は、下記に示す様に、テンシロン万能試験装置（オリエンテック社製）の圧縮試験モードにより測定することができる。 The scissors 6 are generated by deforming the two sheet materials 2 and 3 by the contraction of the elastic member 4. Therefore, the rigidity of the sheet materials 2 and 3 is an important factor that determines the formability and cushioning properties of the stretchable composite sheet 1. Stiffness can be represented by the buckling strength of the sheet material. The buckling strength of the nonwoven fabric used in the present invention is preferably 100 cN or less, particularly preferably 70 cN or less. Here, the buckling strength can be measured by a compression test mode of a Tensilon universal testing apparatus (manufactured by Orientec) as shown below.

＜座屈強度試験法（ＣＤ）＞
機械流れ方向（ＭＤ）に１５０ｍｍ、機械流れ方向と直交する方向（ＣＤ）に３０ｍｍの長方形の試験片を取り、直径４５ｍｍの円筒を作り、重なり合った部分の上端と下端とをホッチキス等で止め測定サンプルとする。これを、テンシロン万能試験装置の圧縮武験モードにより、測定環境２０℃、６５％ＲＨ、測定条件としては、圧縮速度１０ｍｍ／ｍｉｎ、測定距離２０ｍｍで測定を行う。サンプルを２０ｍｍ圧縮した時の最大強度を各サンプルについて測定し、その平均値を求め、これを座屈強度とする。
前述したように、シート材２，３としては好ましくは不繊布が用いられる。不織布の坪量としては、好ましくは５〜５０ｇ／ｍ²、特に好ましくは８〜３０ｇ／ｍ²である。坪量がこのような範囲内にある不織布の座屈強度は、好ましくはＣＤ方向で５０ｃＮ以下、特に好ましくは３０ｃＮ以下、ＭＤ方向で好ましくは７０ｃＮ以下、特に好ましくは５０ｃＮ以下である。柔らかいシート材を使用することで、襞の成形性を高めることができる。 <Buckling strength test method (CD)>
Take a rectangular test piece of 150 mm in the machine flow direction (MD) and 30 mm in the direction perpendicular to the machine flow direction (CD), make a cylinder with a diameter of 45 mm, and measure the upper and lower ends of the overlapping parts with staples etc. A sample. This is measured at a measurement environment of 20 ° C., 65% RH, and measurement conditions of a compression speed of 10 mm / min and a measurement distance of 20 mm in the compression test mode of the Tensilon universal testing device. The maximum strength when the sample is compressed by 20 mm is measured for each sample, the average value is obtained, and this is taken as the buckling strength.
As described above, a non-woven cloth is preferably used as the sheet materials 2 and 3. The basis weight of the nonwoven fabric is preferably 5 to 50 g / m ² , particularly preferably 8 to 30 g / m ² . The buckling strength of a nonwoven fabric having a basis weight within such a range is preferably 50 cN or less, particularly preferably 30 cN or less in the CD direction, and preferably 70 cN or less, particularly preferably 50 cN or less in the MD direction. By using a soft sheet material, the moldability of the ridge can be improved.

本発明における２枚のシート材２，３は、別体の２枚のシートに限られるものではなく、一枚のシート材を折り曲げて相対向する２面を形成し、一方の面を構成する部分を１枚のシート材、他方の面を構成する部分をもう１枚のシート材とすることもできる。 The two sheet materials 2 and 3 in the present invention are not limited to two separate sheets, but bend one sheet material to form two opposing surfaces, and constitute one surface. The portion may be one sheet material, and the portion constituting the other surface may be another sheet material.

弾性部材４の形成材料としては、使い捨ておむつや生理用ナプキン等の吸収性物品に用いられる各種公知の弾性材料を特に制限なく用いることができ、例えば素材としては、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、伸縮性ポリオレフィン、ポリウレタン等を挙げることができ、形態としては、断面が矩形、正方形、円形、多角形状等の糸状ないし紐状（平ゴム等）のもの、あるいはマルチフィラメントタイプの糸状のもの、あるいは平状、リボン状、テープ状、シート状、網状、繊維状等を用いることができる。 As a forming material of the elastic member 4, various known elastic materials used for absorbent articles such as disposable diapers and sanitary napkins can be used without particular limitation. Examples of the material include styrene-butadiene, butadiene, isoprene, Synthetic rubber such as neoprene, natural rubber, EVA, stretchable polyolefin, polyurethane, etc. Alternatively, a multifilament type thread shape, a flat shape, a ribbon shape, a tape shape, a sheet shape, a net shape, a fiber shape, or the like can be used.

伸縮性複合シート１の襞６の成形性を決める重要な要素の一つとして、弾性部材４の伸長倍率と伸縮応力がある。襞６の断面形状を凸形状にするために所要の弾性部材４の伸長倍率と伸縮応力が必要となる。弾性部材４は、好ましくは２０〜１０００％、特に好ましくは５０〜４００％の伸長状態にてシート材に対して適用される。そうして、弾性部材４が収縮し、収縮した部分の不織布が余り、接合領域５（接合部７）の貼り合わせ面とは反対側の方向に、外側に断面凸形状に変形することで襞６が形成される。
以上のように、襞６の高さは成形性・クッション性を考えるとき重要であり、接合領域５及び接合部７の配置パターンと間隔、材料及び弾性部材の選択と伸長率からの応力設計により、任意に設計することができる。この襞６の高さは，好ましくは片側１〜２０ｍｍ程度である。襞６を高くするためには、隣り合う接合領域５，５の間隔を所定の寸法だけ確保し、その間隔が詰まるだけの伸縮伸長倍率と凸形状の襞６を形成させることで、ボリューム感のある柔らかい伸縮性複合シート１が得られる。襞６の片側の高さがｈのシートをつくるとき、このとき接合領域５，５の間隔は最低でも２×ｈとすることが好ましく、間隔が２×ｈの最低値の場合に、弾性部材４は隣り合う接合領域５，５が隣接するくらい収縮することが好ましい。 One of the important factors that determine the formability of the collar 6 of the stretchable composite sheet 1 is the expansion ratio and the stretch stress of the elastic member 4. In order to make the cross-sectional shape of the collar 6 convex, the required expansion ratio and expansion / contraction stress of the elastic member 4 are required. The elastic member 4 is preferably applied to the sheet material in a stretched state of 20 to 1000%, particularly preferably 50 to 400%. Then, the elastic member 4 is contracted, and the non-woven fabric in the contracted part is left, and the outer surface is deformed into a convex convex shape in the direction opposite to the bonding surface of the joint region 5 (joint portion 7). 6 is formed.
As described above, the height of the flange 6 is important when considering formability / cushioning properties, and is determined by the stress design based on the arrangement pattern and spacing of the joining region 5 and the joining portion 7, the selection of materials and elastic members, and the elongation rate. Can be arbitrarily designed. The height of the flange 6 is preferably about 1 to 20 mm on one side. In order to increase the height of the heel 6, by securing a predetermined distance between the adjacent joining regions 5 and 5, and forming the expansion and contraction magnification and the convex shape of the ridge 6 so as to close the distance, A soft stretchable composite sheet 1 is obtained. When a sheet having a height h on one side of the ridge 6 is formed, the distance between the joining regions 5 and 5 is preferably at least 2 × h. When the distance is the minimum value of 2 × h, the elastic member 4 is preferably shrunk so that adjacent bonding regions 5 and 5 are adjacent to each other.

好ましい弾性部材４の一つとして、天然ゴム（または合成ゴム）製の弾性部材がある。天然ゴム（合成ゴム）製の弾性部材としては、厚みが０．０５〜１．５ｍｍ、幅が０．２〜５ｍｍであって、断面積にもよるが代表的な断面積として０．３５ｍｍ厚みの０．９１ｍｍ幅の単糸の１００％伸長時の応力が１〜７０ｇｆ程度、好ましくは１〜４０ｇｆ程度、特に好ましくは１〜３０ｇｆ程度の低モジュラスの弾性部材が挙げられる。伸縮性複合シート１に、こうした応力特性を有する弾性部材４を複数本用いる。
他の好ましい弾性部材４として、ポリウレタンのスパンデックス弾性繊維がある。単糸のサイズが１０〜３３６０デニールのもの、特に好ましくは７０〜１１２０デニールのものが用いられる。デニールは糸の太さを表す単位であり、９０００ｍで１ｇある糸を１デニールと呼ぶ。このスパンデックス弾性繊維を３０〜５００％に伸長したものを複数本用いる。
上記に挙げた低モジュラスの弾性部材４の単糸を、好ましくは１００％以上、特に好ましくは２００％以上の高伸長倍率で複数本配置することにより、柔らかく伸縮する美しい襞６を有する伸縮性複合シートを得ることができる。 One preferred elastic member 4 is an elastic member made of natural rubber (or synthetic rubber). The elastic member made of natural rubber (synthetic rubber) has a thickness of 0.05 to 1.5 mm and a width of 0.2 to 5 mm. A low modulus elastic member having a 0.91 mm wide single yarn having a stress at 100% elongation of about 1 to 70 gf, preferably about 1 to 40 gf, particularly preferably about 1 to 30 gf. A plurality of elastic members 4 having such stress characteristics are used for the stretchable composite sheet 1.
Another preferred elastic member 4 is polyurethane spandex elastic fiber. A single yarn having a size of 10 to 3360 denier, particularly preferably 70 to 1120 denier is used. Denier is a unit representing the thickness of a yarn, and a yarn of 1 g at 9000 m is called 1 denier. A plurality of spandex elastic fibers that are stretched to 30 to 500% are used.
An elastic composite having a beautiful heel 6 that softly expands and contracts by disposing a plurality of the single yarns of the elastic member 4 having a low modulus mentioned above at a high elongation ratio of preferably 100% or more, particularly preferably 200% or more. A sheet can be obtained.

但し、第１実施形態の伸縮性複合シート１は、上述の如き構成の接合領域５の採用により、弾性部材４の伸長率が低い場合、例えば伸長率が１０〜３０％という低伸長率の弾性部材４を用いた場合も、隣り合う襞６，６の谷部の間で低伸長率の弾性部材４をしっかりと固定し、確実に収縮させることができるため、成形性に優れている。 However, the elastic composite sheet 1 according to the first embodiment adopts the joining region 5 having the above-described configuration, and when the elastic member 4 has a low elongation rate, for example, the elasticity of the low elongation rate is 10 to 30%. Even when the member 4 is used, the elastic member 4 having a low elongation rate can be firmly fixed between the valleys of the adjacent flanges 6 and 6, and can be reliably contracted.

上述の如き構成の第１実施形態の伸縮性複合シート１によれば、シートの柔軟性及び通気性を左右するシート材２，３間の接合形態として、シート材２，３間を接合する複数の接合領域５が弾性部材４の伸縮方向Ｘに間欠的に配され且つ該伸縮方向Ｘと直交する直交方向Ｙに連続的に配されていると共に、該複数の接合領域５それぞれが、２枚のシート材２，３が接合されている接合部７と接合されていない非接合部８とを有しており、これら領域７及び８が、両方向Ｘ，Ｙに交互に配されている形態を採用しているため、柔軟で感触が柔らかく、通気性及び肌触りが良好なギャザー（多数の襞を有する伸縮部）を有しており、吸収性物品や着用物品等にそのようなギャザーを形成することができる。 According to the stretchable composite sheet 1 of the first embodiment having the above-described configuration, a plurality of sheets that join the sheet materials 2 and 3 are joined as the joining form between the sheet materials 2 and 3 that affects the flexibility and breathability of the sheet. The joining regions 5 are intermittently arranged in the expansion / contraction direction X of the elastic member 4 and continuously arranged in the orthogonal direction Y orthogonal to the expansion / contraction direction X, and each of the plurality of joining regions 5 includes two sheets. The sheet material 2, 3 is joined to the joined portion 7 and the unjoined portion 8 is not joined, and the regions 7 and 8 are alternately arranged in both directions X and Y. Because it is adopted, it has a gather that is flexible and soft to the touch, has good breathability and touch (a stretchable part having a large number of wrinkles), and forms such gathers on absorbent articles, worn articles, etc. be able to.

第１実施形態の伸縮性複合シート１は、例えば以下の製造方法により効率的且つ経済的に生産することができる。
第１実施形態の伸縮性複合シートの製造方法は、図５に示すように、搬送中の第１シート連続体４０の一面４０ａに、接着剤塗布手段６０により接着剤を前記接合領域５の配置パターン（図１及び図３参照）で塗布して複数の接着剤塗布部４１を形成する塗布工程と、複数本の弾性部材４を接着剤塗布部４１と重なるように第１シート連続体４０の一面４０ａ上に伸長状態で配置する配置工程と、第１シート連続体４０の一面４０ａ上に、該第１シート連続体４０とは別体の第２シート連続体４２を重ね合わせる重合工程とを備えている。 The stretchable composite sheet 1 of the first embodiment can be efficiently and economically produced, for example, by the following manufacturing method.
As shown in FIG. 5, the manufacturing method of the stretchable composite sheet according to the first embodiment arranges the bonding region 5 on the one surface 40 a of the first continuous sheet 40 being conveyed by the adhesive application means 60. An application step of applying a pattern (see FIGS. 1 and 3) to form a plurality of adhesive application portions 41, and the first sheet continuous body 40 so that a plurality of elastic members 4 overlap the adhesive application portions 41. An arrangement step of arranging the first sheet continuous body 40 in a stretched state on the one surface 40a, and a polymerization step of superposing a second sheet continuous body 42 separate from the first sheet continuous body 40 on the one surface 40a of the first sheet continuous body 40. I have.

接着剤塗布手段６０は、接着剤の塗布時に第１シート連続体４０の一面４０ａにそのロール外周面６１ａが当接される塗布ロール６１を具備している。前記塗布工程では、この塗布ロール６１を第１シート連続体４０の搬送速度と同速度で周方向に回転させつつ、ロール外周面６１ａを第１シート連続体４０の一面４０ａに当接させた状態で該ロール外周面６１ａから該一面４０ａ上に接着剤を供給することにより、複数の接着剤塗布部４１を図１及び図３に示す如き配置パターン（複数の接合部７と非接合部８とが図３に示す如き所定のパターンで配置されてなる複数の接合領域５が、図１に示す如き所定のパターンで配置されてなる配置パターン）で形成する。
これにより、第１シート連続体４０の搬送方向に、それぞれ複数の接着剤塗布部４１からなる接着剤塗布ラインが複数本形成され、また、該搬送方向と直交する直交方向に、それぞれ複数の接着剤塗布部４１からなる接着剤塗布ラインが複数本形成される。 The adhesive application unit 60 includes an application roll 61 in which the outer peripheral surface 61a of the first sheet continuous body 40 is brought into contact with the one surface 40a of the first sheet continuous body 40 when the adhesive is applied. In the coating step, the roll outer peripheral surface 61a is in contact with the one surface 40a of the first sheet continuous body 40 while rotating the coating roll 61 in the circumferential direction at the same speed as the conveying speed of the first sheet continuous body 40. In this way, by supplying an adhesive from the outer peripheral surface 61a of the roll onto the one surface 40a, a plurality of adhesive application portions 41 are arranged as shown in FIGS. 1 and 3 (a plurality of joining portions 7 and non-joining portions 8 and A plurality of joining regions 5 arranged in a predetermined pattern as shown in FIG. 3 are formed in an arrangement pattern (arranged in a predetermined pattern as shown in FIG. 1).
As a result, a plurality of adhesive application lines each including a plurality of adhesive application portions 41 are formed in the conveyance direction of the first sheet continuous body 40, and a plurality of adhesions are respectively formed in the orthogonal direction perpendicular to the conveyance direction. A plurality of adhesive application lines including the agent application part 41 are formed.

尚、本製造方法においては、図５に示すように、接着剤塗布部４１の存在しない接着剤非塗布領域Ｑが、第１シート連続体４０の搬送方向に所定間隔を置いて複数配されている。接着剤非塗布領域Ｑは、シート連続体４０，４２の積層体を所定の長さに切断する際の切断領域として利用される。接着剤非塗布領域Ｑの前記搬送方向に沿った長さは、接着剤塗布部４１の該搬送方向に沿った長さ〔接合領域５の長さＬ２に相当（図１参照）〕の１０〜１０００％が好ましく、２０〜５００％が更に好ましい。 In the present manufacturing method, as shown in FIG. 5, a plurality of adhesive non-application areas Q where the adhesive application part 41 does not exist are arranged at predetermined intervals in the conveyance direction of the first sheet continuous body 40. Yes. The adhesive non-application area Q is used as a cutting area when the laminated body of the sheet continuous bodies 40 and 42 is cut into a predetermined length. The length of the adhesive non-application area Q along the conveyance direction is 10 to 10 times the length of the adhesive application section 41 along the conveyance direction (corresponding to the length L2 of the bonding area 5 (see FIG. 1)). 1000% is preferable, and 20 to 500% is more preferable.

接着剤塗布手段６０としては、例えば、ロールコーター（塗布ロールのロール外周面が平滑なもの）、グラビアコーター（塗布ロールのロール外周面に凹部が形成されているもの）、凸版コーター（塗布ロールのロール外周面に凸部が形成されているもの）、転写コーター（凸版又は凹版の塗布ロールから接着剤を転写するもの）、スクリーンコーター（塗布ロールのロール外周面に設けられた接着剤供給部から接着剤を押し出すもの）、カンターコーター（登録商標）等、公知の接着剤塗布手段を用いることができる。また、接着剤塗布手段６０としては、特開平３−１２２６７号公報及び特開平３−９０６０２号公報に記載の塗布手段を用いることもできる。 Examples of the adhesive application means 60 include a roll coater (with a smooth outer peripheral surface of the coating roll), a gravure coater (with a concave portion formed on the outer peripheral surface of the coating roll), and a letterpress coater (of the coating roll). From the roll outer peripheral surface), transfer coater (transferring the adhesive from the relief printing plate or intaglio coating roll), screen coater (from the adhesive supplying portion provided on the roll outer peripheral surface of the coating roll) Any known adhesive application means such as an adhesive extruding agent) or Canter Coater (registered trademark) can be used. As the adhesive application means 60, the application means described in JP-A-3-12267 and JP-A-3-90602 can also be used.

前記配置工程では、複数本の弾性部材４それぞれに一定のテンションを掛けて伸張状態としつつ、該弾性部材４をその伸縮方向Ｘに沿って互いに平行に第１シート連続体４０の一面４０ａ上に供給する。弾性部材４の供給方向（伸縮方向Ｘ）は、第１シート連続体４０の搬送方向と一致している。供給された各弾性部材４は、上述した、第１シート連続体４０の搬送方向に沿う接着剤塗布ラインに沿って、該接着剤塗布ラインを構成する各接着剤塗布部４１を介して一面４０ａ上に配置される。供給される弾性部材４の本数は、該接着剤塗布ラインの本数と等しい。 In the arrangement step, the elastic members 4 are stretched by applying a certain tension to each of the plurality of elastic members 4, and the elastic members 4 are parallel to each other along the expansion / contraction direction X on the one surface 40a of the first sheet continuous body 40. Supply. The supply direction (stretching direction X) of the elastic member 4 coincides with the transport direction of the first sheet continuous body 40. Each of the supplied elastic members 4 has one surface 40a through the adhesive application line 41 constituting the adhesive application line along the adhesive application line along the conveyance direction of the first sheet continuous body 40 described above. Placed on top. The number of elastic members 4 supplied is equal to the number of the adhesive application lines.

前記重合工程では、第１シート連続体４０と同じ幅の第２シート連続体４２を、該第１シート連続体４０の一面４０ａ上に供給し、重合ロール４３にて両シート４０，４２を重ね合わせる。これにより、両シート４０，４２間に、複数本の弾性部材４が伸長状態で挟持固定される。シート連続体４０，４２としては、前述したシート材２，３と同様のものを用いることができる。 In the polymerization step, a second sheet continuous body 42 having the same width as the first sheet continuous body 40 is supplied onto one surface 40 a of the first sheet continuous body 40, and the sheets 40 and 42 are overlapped by the polymerization roll 43. Match. Thereby, the some elastic member 4 is clamped and fixed between the both sheets 40 and 42 in the expansion | extension state. As the sheet continuums 40 and 42, those similar to the sheet materials 2 and 3 described above can be used.

このようにして複数本の弾性部材４を挟んだ状態の両シート連続体４０，４２における、弾性部材４の伸縮方向Ｘにおいて互いに離間する部位（接着剤塗布部４１の非形成部位）に、端部シール部１１（図１及び図２参照）を形成するための一体化処理を施す。この一体化処理は、熱エンボス又は超音波エンボス処理を用いることができる。また、他の一体化処理として、一方又は両方のシート連続体及び／又は弾性部材に接着剤を塗工し、その接着剤を塗布した部位を加圧する処理であっても良い。この一体化処理は、端部シール１１を形成しない場合には省略することができる。
そして、一体化処理を施した部位が、弾性部材４の伸縮方向Ｘの両端部に位置するように、弾性部材４を挟んだ状態の両シート連続体４０，４２における所定箇所（接着剤非塗布領域Ｑ）を切断する。そして、弾性部材４を収縮させて両シート連続体４０，４２のそれぞれに複数本の襞６を形成させることにより、上述した構成の伸縮性複合シート１が得られる。 In the two sheet continuous bodies 40 and 42 in a state where the plurality of elastic members 4 are sandwiched in this way, the end portions are separated from each other in the expansion / contraction direction X of the elastic member 4 (the non-formation portion of the adhesive application portion 41). An integration process for forming the part seal part 11 (see FIGS. 1 and 2) is performed. For this integration process, heat embossing or ultrasonic embossing can be used. Moreover, the process which applies the adhesive agent to one or both sheet | seat continuous bodies and / or an elastic member, and pressurizes the site | part which apply | coated the adhesive agent as another integration process may be sufficient. This integration process can be omitted when the end seal 11 is not formed.
And the predetermined | prescribed location (adhesive non-application | coating) in the both sheet | seat continuous bodies 40 and 42 of the state which pinched | interposed the elastic member 4 so that the site | part which performed the integration process may be located in the both ends of the expansion / contraction direction X of the elastic member 4 Cut region Q). And the elastic composite sheet 1 of the structure mentioned above is obtained by shrinking the elastic member 4 and forming the multiple ridges 6 in each of the two sheet continuous bodies 40 and 42.

ところで、上述した第１実施形態では、複数の接合領域５は、弾性部材４の伸縮方向Ｘ及び該伸縮方向Ｘと直交する直交方向Ｙの両方向に間欠的に配されていたが、該直交方向Ｙに連続的に、即ち、直交方向Ｙに間隔を置かずに配しても良い（以下、この形態を第２実施形態という）。この第２実施形態においては、直交方向Ｙに連続的に配置された隣り合う接合領域５，５の境界において、一方の接合領域５の接合部７と、他方の接合領域５の接合部７とが直交方向Ｙに間欠的に配置されることが好ましい。即ち、第２実施形態では、複数の接合部７は、直交方向Ｙに延びる複数の接合領域５の連続体において、該直交方向Ｙに間欠的に配置されることが好ましい。 By the way, in 1st Embodiment mentioned above, although the some joining area | region 5 was distribute | arranged intermittently in both directions of the expansion-contraction direction X of the elastic member 4, and the orthogonal direction Y orthogonal to this expansion-contraction direction X, this orthogonal direction You may arrange | position to Y continuously, ie, without leaving an interval in the orthogonal direction Y (this form is hereafter called 2nd Embodiment). In the second embodiment, at the boundary between adjacent bonding regions 5 and 5 arranged continuously in the orthogonal direction Y, the bonding portion 7 of one bonding region 5 and the bonding portion 7 of the other bonding region 5 Are preferably arranged intermittently in the orthogonal direction Y. That is, in the second embodiment, it is preferable that the plurality of bonding portions 7 be intermittently arranged in the orthogonal direction Y in a continuous body of the plurality of bonding regions 5 extending in the orthogonal direction Y.

図６〜図９は、上述した第２実施形態の伸縮性複合シート、即ち、複数の接合領域５が、弾性部材４の伸縮方向Ｘに間欠的に配されていると共に、該伸縮方向Ｘと直交する直交方向Ｙに連続的に配されている伸縮性複合シートの製造方法が示されている。
図６に示す製造方法においては、複数の接着剤塗布部４５それぞれは、巨視的には、第１シート連続体４０の搬送方向（弾性部材４の伸縮方向Ｘ）と直交する直交方向Ｙに延びる直線状を有しており、微視的には、図３に示すドット状の接合部７と同様の微小な接着剤塗布部（図示せず）の集合体からなる。即ち、図６に示す製造方法における接着剤塗布部４５は、前記搬送方向及びその直交方向Ｙの両方向に間欠的に配された複数のドット状の接着剤塗布部の集合体からなり、且つ全体として、該直交方向Ｙに延びる直線状を有している。 6 to 9 show the elastic composite sheet according to the second embodiment described above, that is, a plurality of joining regions 5 are intermittently arranged in the elastic direction X of the elastic member 4, and the elastic direction X and A method for producing a stretchable composite sheet that is continuously arranged in an orthogonal direction Y orthogonal to each other is shown.
In the manufacturing method shown in FIG. 6, each of the plurality of adhesive application portions 45 macroscopically extends in an orthogonal direction Y orthogonal to the conveyance direction of the first sheet continuous body 40 (the expansion / contraction direction X of the elastic member 4). It has a straight line shape and is microscopically composed of an assembly of minute adhesive application portions (not shown) similar to the dot-like joint portions 7 shown in FIG. That is, the adhesive application part 45 in the manufacturing method shown in FIG. 6 is composed of an aggregate of a plurality of dot-like adhesive application parts arranged intermittently in both the transport direction and the direction Y perpendicular thereto. As a straight line extending in the orthogonal direction Y.

図７に示す製造方法は、巨視的に直線状の複数の接着剤塗布部４５の前記搬送方向における間隔が統一されていない点で、図６に示す製造方法と異なる。
図７に示す製造方法は、特に、複数の襞６の大きさが統一されていない伸縮性複合シートを製造するのに適している。このような襞の大きさが異なる伸縮性複合シートは、着用物品等に適用する場合に、着用部位毎に適切な襞を与えることができ、そうすることで視覚的にも機能性を訴求できる効果があるとともに、必要最小限の材料使用にとどめることができるという効果を奏する。 The manufacturing method shown in FIG. 7 differs from the manufacturing method shown in FIG. 6 in that the intervals in the transport direction of the plurality of adhesive application portions 45 that are macroscopically linear are not unified.
The manufacturing method shown in FIG. 7 is particularly suitable for manufacturing a stretchable composite sheet in which the sizes of the plurality of ridges 6 are not unified. Such stretchable composite sheets having different wrinkle sizes can give appropriate wrinkles for each wearing part when applied to a worn article and the like, and can appeal for functionality visually. There is an effect that it is possible to use only the minimum necessary materials as well as the effect.

図８に示す製造方法は、巨視的に直線状の複数の接着剤塗布部４５が、前記搬送方向に等間隔に配されており、接着剤非塗布領域Ｑが形成されていない点で、図６に示す製造方法と異なる。
図８に示す製造方法は、特に、掃除用シートなど個々の物品に位相の管理が不要な伸縮性複合シートや、着用物品の腰周りを形成する弾性バンド材を製造するのに適している。 The manufacturing method shown in FIG. 8 has a plurality of macroscopically linear adhesive application portions 45 arranged at equal intervals in the transport direction, and the adhesive non-application area Q is not formed. 6 is different from the manufacturing method shown in FIG.
The manufacturing method shown in FIG. 8 is particularly suitable for manufacturing a stretchable composite sheet that does not require phase control for individual articles such as a cleaning sheet, and an elastic band material that forms the waist of a worn article.

図９に示す製造方法は、第１シート連続体４０のみならず、第２シート連続体４２にも巨視的に直線状の複数の接着剤塗布部４５を形成している点で、図６に示す製造方法と異なる。即ち、図９に示す製造方法は、第２シート連続体４２を第１シート連続体４０に重ね合わせる前に、第２シート連続体４０における第１シート連続体４０との重合面４２ａに、接着剤を塗布し、接着剤塗布部４５を形成する。
このように、第１シート連続体４０に加えて、第２シート連続体４０にも追加的に接着剤を塗布することで、弾性部材４の接合強度を一層高めることができ、弾性部材４の剥離を効果的に防止することができる。 The manufacturing method shown in FIG. 9 is not only in the first sheet continuous body 40 but also in the second sheet continuous body 42 in that a plurality of macroscopic linear adhesive application portions 45 are formed in FIG. Different from the manufacturing method shown. That is, in the manufacturing method shown in FIG. 9, the second sheet continuous body 42 is bonded to the polymerization surface 42 a of the second sheet continuous body 40 with the first sheet continuous body 40 before the second sheet continuous body 42 is superimposed on the first sheet continuous body 40. An adhesive is applied to form an adhesive application part 45.
Thus, in addition to the 1st sheet | seat continuous body 40, by apply | coating an adhesive agent also to the 2nd sheet | seat continuous body 40, the joint strength of the elastic member 4 can be raised further, and the elastic member 4 of Separation can be effectively prevented.

図９に示す形態においては、第２シート連続体４５における接着剤塗布部４５の形成箇所は、第１シート連続体４０における接着剤非塗布領域Ｑに隣接する接着剤塗布部４５´と対向する箇所である。このように、２枚のシート連続体４０，４２それぞれにおける接着剤非塗布領域Ｑに隣接する領域に接着剤を塗布することは、弾性部材４の剥離防止に特に有効である。 In the form shown in FIG. 9, the formation location of the adhesive application part 45 in the 2nd sheet | seat continuous body 45 opposes adhesive application part 45 'adjacent to the adhesive non-application area | region Q in the 1st sheet | seat continuous body 40. FIG. It is a place. As described above, applying the adhesive to the area adjacent to the adhesive non-application area Q in each of the two continuous sheet bodies 40 and 42 is particularly effective for preventing the elastic member 4 from peeling off.

以下、本発明の伸縮性複合シートの他の実施形態について説明する。後述する他の実施形態については、上述した第１及び第２実施形態の伸縮性複合シート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。特に説明しない構成部分は、上述した第１及び第２実施形態の伸縮性複合シートについての説明が適宜適用される。 Hereinafter, other embodiments of the stretchable composite sheet of the present invention will be described. Regarding other embodiments to be described later, components that are different from the elastic composite sheets of the first and second embodiments described above will be mainly described, and the same components will be denoted by the same reference numerals and description thereof will be omitted. For the components that are not particularly described, the description of the stretchable composite sheet of the first and second embodiments described above is appropriately applied.

図１０には、第３実施形態の伸縮性複合シートにおける接合領域５の平面図が示されている。第３実施形態においては、複数の接合領域５が第１実施形態と同様（図１参照）に配されており、各接合領域５は、図１０に示すように、２枚のシート材２，３が接合されている接合部７と接合されていない非接合部８とを有しており、接合部７及び非接合部８が、弾性部材４の伸縮方向Ｘ及びその直交方向Ｙの両方向に交互に配されている。 The top view of the joining area | region 5 in the elastic composite sheet of 3rd Embodiment is shown by FIG. In the third embodiment, a plurality of joining regions 5 are arranged in the same manner as in the first embodiment (see FIG. 1), and each joining region 5 includes two sheet materials 2, as shown in FIG. 3 and the non-joining part 8 which is not joined, and the joining part 7 and the non-joining part 8 are both in the expansion / contraction direction X of the elastic member 4 and its orthogonal direction Y. Alternatingly arranged.

第３実施形態における接合部７は、平面視で弾性部材４の伸縮方向Ｘと交差する交差方向〔前記直交方向Ｙ（伸縮方向Ｘと直交する直交方向）を除く〕に延びる直線状に形成されている。弾性部材４の伸縮方向Ｘと交差する交差方向とは、弾性部材４の伸縮方向Ｘに対して、９０°を除く所定の角度をなす方向（非平行な方向）である。直線状の接合部７の伸縮方向Ｘとの交差角度は、弾性部材４を確実に接着し、接着線を短くするという観点から、好ましくは１５〜７５°、更に好ましくは３０〜６０°である。
また、第３実施形態においては、接合部７の各配置ピッチＰ５（図１０参照）は、好ましくは０．５〜１０ｍｍ、さらに好ましくは０．５〜５ｍｍである。
また、第３実施形態においては、やわらかさを確保する点から、直線状の接合部７の幅Ｗは、好ましくは０．３〜５ｍｍ、更に好ましくは０．３〜２ｍｍである。
第３実施形態の伸縮性複合シート１によっても、第１実施形態と同様の効果が奏される。 The joint 7 in the third embodiment is formed in a straight line extending in a crossing direction (excluding the orthogonal direction Y (orthogonal direction orthogonal to the expansion / contraction direction X)) intersecting the expansion / contraction direction X of the elastic member 4 in plan view. ing. The intersecting direction intersecting with the expansion / contraction direction X of the elastic member 4 is a direction (non-parallel direction) that forms a predetermined angle excluding 90 ° with respect to the expansion / contraction direction X of the elastic member 4. The crossing angle with the expansion / contraction direction X of the linear joint 7 is preferably 15 to 75 °, more preferably 30 to 60 °, from the viewpoint of securely bonding the elastic member 4 and shortening the bonding line. .
Moreover, in 3rd Embodiment, each arrangement | positioning pitch P5 (refer FIG. 10) of the junction part 7 becomes like this. Preferably it is 0.5-10 mm, More preferably, it is 0.5-5 mm.
Moreover, in 3rd Embodiment, from the point which ensures softness, the width W of the linear junction part 7 becomes like this. Preferably it is 0.3-5 mm, More preferably, it is 0.3-2 mm.
Even with the stretchable composite sheet 1 of the third embodiment, the same effects as those of the first embodiment can be obtained.

図１１（ａ）には第４実施形態、図１１（ｂ）には第５実施形態、図１１（ｃ）には第６実施形態の伸縮性複合シートの要部が示されている。図１１においては、説明容易のため、２枚のシート材２，３のうちの一方（シート材３）の図示を省略している。
第４実施形態においては、図１１（ａ）に示すように、接合領域５が正方形形状に形成されている。即ち、第４実施形態における接合領域５は、弾性部材４の伸縮方向Ｘと直交する直交方向Ｙに沿った長さＬ１と、該伸縮方向Ｘに沿った長さＬ２とが等しい。
第３実施形態の伸縮性複合シート１によっても、第１実施形態と同様の効果が奏される。 FIG. 11 (a) shows the main part of the fourth embodiment, FIG. 11 (b) shows the fifth embodiment, and FIG. 11 (c) shows the stretchable composite sheet of the sixth embodiment. In FIG. 11, for ease of explanation, one of the two sheet materials 2 and 3 (sheet material 3) is not shown.
In 4th Embodiment, as shown to Fig.11 (a), the junction area | region 5 is formed in square shape. That is, in the joining region 5 in the fourth embodiment, the length L1 along the orthogonal direction Y perpendicular to the expansion / contraction direction X of the elastic member 4 is equal to the length L2 along the expansion / contraction direction X.
Even with the stretchable composite sheet 1 of the third embodiment, the same effects as those of the first embodiment can be obtained.

第５実施形態においては、図１１（ｂ）に示すように、弾性部材４の伸縮方向Ｘに沿う接合ライン５０、及び直交方向Ｙに沿う接合ライン５１の両方向において、形状（大きさ）の異なる２種類の接合領域５ａ，５ｂが交互に配されている。接合領域５ａは平面視で矩形形状を有し、接合領域５ｂは平面視で正方形形状を有している。接合領域５ａの弾性部材４の伸縮方向Ｘに沿った長さと、接合領域５ｂの該伸縮方向Ｘに沿った長さとは等しい。
第５実施形態の伸縮性複合シート１によっても、第１実施形態と同様の効果が奏される。 In 5th Embodiment, as shown in FIG.11 (b), a shape (size) differs in both directions of the joining line 50 along the expansion-contraction direction X of the elastic member 4, and the joining line 51 along the orthogonal direction Y. As shown in FIG. Two types of bonding regions 5a and 5b are alternately arranged. The joining region 5a has a rectangular shape in plan view, and the joining region 5b has a square shape in plan view. The length along the expansion / contraction direction X of the elastic member 4 in the bonding region 5a is equal to the length along the expansion / contraction direction X of the bonding region 5b.
Also with the stretchable composite sheet 1 of the fifth embodiment, the same effects as in the first embodiment are exhibited.

第６実施形態においては、図１１（ｃ）に示すように、複数の接合領域５の少なくとも一部において、１つの接合領域５に重なる弾性部材４の本数が複数（図１１（ｃ）では２本）となされている。
第６実施形態の伸縮性複合シート１によっても、第１実施形態と同様の効果が奏される。
尚、第４〜第６実施形態の何れにおいても、第１実施形態と同様に、弾性部材４は、直交方向Ｙに延びる複数本の接合ライン５１それぞれにおいて、２枚のシート材２，３間に固定されており、これにより、整然と成形されたきれいな襞６が形成され、延いては、視覚的にも優れたギャザーが形成される。 In the sixth embodiment, as shown in FIG. 11C, at least a part of the plurality of bonding regions 5 includes a plurality of elastic members 4 that overlap one bonding region 5 (2 in FIG. 11C). Book).
Also with the stretchable composite sheet 1 of the sixth embodiment, the same effects as in the first embodiment are produced.
In any of the fourth to sixth embodiments, similarly to the first embodiment, the elastic member 4 is formed between the two sheet materials 2 and 3 in each of the plurality of joining lines 51 extending in the orthogonal direction Y. As a result, a clean ridge 6 formed in an orderly manner is formed, and as a result, a visually excellent gather is formed.

上述した本発明の伸縮性複合シートは、例えば、使い捨ておむつ、生理用ナプキン等の吸収性物品の伸縮部形成用に特に好ましく用いられる。吸収性物品は、典型的には、表面シート、裏面シート及び両シート間に介在配置された液保持性の吸収体を具備している。
例えば、本発明の伸縮性複合シートを用いて、ファスニングテープを有するいわゆる展開型の使い捨ておむつにおける伸縮部を形成する場合、１）ウエスト回りの伸縮部、２）ファスニングテープに連動して伸縮するテープ近傍の伸縮部、３）胴回りの伸縮部、４）おむつの肌当接面側の長手方向左右両側に設けられた防漏壁（立体ギャザー）の肌当接面に形成された伸縮部、等を本発明の伸縮性複合シートを用いて形成することができる。 The stretchable composite sheet of the present invention described above is particularly preferably used for forming stretchable portions of absorbent articles such as disposable diapers and sanitary napkins. The absorbent article typically includes a top sheet, a back sheet, and a liquid-retaining absorbent body disposed between both sheets.
For example, when forming a stretchable part in a so-called unfoldable disposable diaper having a fastening tape using the stretchable composite sheet of the present invention, 1) a stretchable part around the waist, 2) a tape that stretches and contracts in conjunction with the fastening tape Near stretchable part, 3) Stretchable part around waist, 4) Stretchable part formed on skin contact surface of leak-proof wall (solid gather) provided on both left and right sides of diaper skin contact surface side, etc. Can be formed using the stretchable composite sheet of the present invention.

図１２には、本発明の伸縮性複合シートを用いた吸収性物品の一実施形態としてのパンツ型の使い捨ておむつ３０が記載されている。
本実施形態のパンツ型の使い捨ておむつ３０（以下、おむつともいう）は、図１２及び図１３に示すように、吸収性コア３１を含む吸収性本体３２と該吸収性本体３２の非肌当接面側に接合された外包材３３とを備え、長手方向に腹側部Ａ、股下部Ｃ及び背側部Ｂに区分されており、腹側部Ａ及び背側部Ｂの両側縁部同士が接合されて一対のサイドシール部３４，３４、ウエスト開口部３５及び一対のレッグ開口部３６，３６が形成されているパンツ型使い捨ておむつである。 FIG. 12 shows a pants-type disposable diaper 30 as an embodiment of an absorbent article using the stretchable composite sheet of the present invention.
A pants-type disposable diaper 30 (hereinafter, also referred to as a diaper) according to the present embodiment includes an absorbent main body 32 including an absorbent core 31 and a non-skin contact between the absorbent main body 32 as shown in FIGS. The outer packaging material 33 joined to the surface side is divided into the ventral side A, the crotch C and the back side B in the longitudinal direction, and both side edges of the ventral side A and the back side B are A pants-type disposable diaper in which a pair of side seal portions 34, 34, a waist opening 35, and a pair of leg openings 36, 36 are formed by bonding.

吸収性本体３２は、肌当接面を構成する液透過性の表面シート（図示せず）、非肌当接面を構成する液不透過性又は撥水性の裏面シート（図示せず）、及びこれら両シート間に介在配置された液保持性の吸収性コア３１を有しており、実質的に縦長に形成されている。吸収性本体３２は、外包材２の腹側部Ａから背側部Ｂに跨って配設されている。吸収性本体３の長手方向端部は、外包材３３の長手方向端部よりもおむつ長手方向内方に位置している。吸収性本体３２は、外包材３３を構成する内層シート３８の肌当接面側に、接着剤、ヒートシール、超音波シール等により接合されている。
吸収性本体３２としては、当該技術分野において通常用いられている材料を特に制限無く用いることができる。例えば吸収性コア３１としては、パルプ繊維等の繊維材料からなる繊維集合体又はこれに吸収性ポリマーを保持させたものを、ティッシュペーパーや不織布等の被覆シートで被覆してなるものを用いることができる。 The absorbent main body 32 includes a liquid-permeable surface sheet (not shown) constituting the skin contact surface, a liquid-impermeable or water-repellent back sheet (not shown) constituting the non-skin contact surface, and It has a liquid-retaining absorbent core 31 interposed between these two sheets, and is formed substantially vertically. The absorptive main body 32 is disposed across the ventral side A to the back side B of the outer packaging material 2. The longitudinal end portion of the absorbent main body 3 is located more inwardly in the diaper longitudinal direction than the longitudinal end portion of the outer packaging material 33. The absorbent main body 32 is joined to the skin contact surface side of the inner layer sheet 38 constituting the outer packaging material 33 by an adhesive, heat seal, ultrasonic seal or the like.
As the absorptive main body 32, a material usually used in the technical field can be used without particular limitation. For example, as the absorbent core 31, a fiber assembly made of a fiber material such as pulp fiber or a material in which an absorbent polymer is held and coated with a covering sheet such as tissue paper or nonwoven fabric may be used. it can.

外包材３３は、外層シート３７、内層シート３８及び両シート３７，３８間に配設された複数本の弾性部材２３，２４，２５，２６から形成されており、外包材３３の腹側部Ａ及び背側部Ｂにおける胴回り部Ｄには、複数本の胴回り弾性部材２３が配されている。胴回り弾性部材２３は、接着剤を介して外層シート３７と内層シート３８との間に伸長状態で固定されている。これにより、胴回り部Ｄに沿って胴回りギャザーＧ１が形成されている。胴回り部Ｄは、外包材３３の腹側部Ａ（背側部Ｂ）におけるウエスト開口部３５の周縁端から下方に２０ｍｍ離間した位置から、レッグ開口部３６の上端までの領域である。 The outer packaging material 33 is formed of an outer layer sheet 37, an inner layer sheet 38, and a plurality of elastic members 23, 24, 25, 26 disposed between both sheets 37, 38. In addition, a plurality of waistline elastic members 23 are arranged on the waistline portion D in the back side portion B. The waistline elastic member 23 is fixed in an extended state between the outer layer sheet 37 and the inner layer sheet 38 via an adhesive. As a result, a waistline gather G1 is formed along the waistline portion D. The waistline portion D is a region from a position spaced 20 mm downward from the peripheral edge of the waist opening 35 in the ventral side A (back side B) of the outer packaging material 33 to the upper end of the leg opening 36.

また、外包材３３の腹側部Ａ及び背側部Ｂにおけるウエスト開口部３５近傍にはそれぞれウエストギャザーＧ２が設けられている。詳述すると、腹側部Ａ及び背側部Ｂそれぞれにおけるウエスト開口部３５には、その周縁部に沿って、複数本のウエスト弾性部材２４が配されている。ウエスト弾性部材２４は、接着剤を介して外層シート３７と内層シート３８との間に伸長状態で固定されている。これにより、一対のサイドシール部３４，３４の間に亘って（ウエスト開口部３５の全周に亘って）ウエストギャザーＧ２が形成されている。 Further, waist gathers G 2 are provided in the vicinity of the waist opening 35 in the ventral side A and the back side B of the outer packaging material 33. More specifically, a plurality of waist elastic members 24 are arranged along the peripheral edge of the waist opening 35 in each of the ventral side A and the back side B. The waist elastic member 24 is fixed in an extended state between the outer layer sheet 37 and the inner layer sheet 38 via an adhesive. Thus, a waist gather G2 is formed between the pair of side seal portions 34, 34 (over the entire circumference of the waist opening 35).

また、外包材３３には一対のレッグ開口部３６，３６に沿ってレッグギャザーＧ３が設けられている。詳述すると、股下部Ｃにおいて湾曲したレッグ開口部３６には、各周縁部に沿って、複数本のレッグ弾性部材２５が配されている。レッグ弾性部材２５は、接着剤を介して外層シート３７と内層シート３８との間に伸長状態で固定されている。これにより、レッグ開口部３６に沿ってレッグギャザーＧ３が形成されている。 The outer packaging material 33 is provided with a leg gather G3 along a pair of leg openings 36, 36. More specifically, a plurality of leg elastic members 25 are arranged along each peripheral edge of the leg opening 36 curved in the crotch part C. The leg elastic member 25 is fixed in an extended state between the outer layer sheet 37 and the inner layer sheet 38 via an adhesive. Thereby, a leg gather G3 is formed along the leg opening 36.

また、前股間部Ｅ（股下部Ｃを長手方向に３〜４等分したときにおける最も腹側の領域）には、複数本の前股間弾性部材２６が幅方向全域に亘って配されている。前股間弾性部材２６は、接着剤を介して外層シート３７と内層シート３８との間に伸長状態で固定されている。これにより、前股間部Ｅに前股間ギャザーＧ４が形成されている。 Further, in the front crotch portion E (the most ventral region when the crotch portion C is equally divided into 3 to 4 in the longitudinal direction), a plurality of front crotch elastic members 26 are arranged over the entire width direction. . The front crotch elastic member 26 is fixed in an extended state between the outer layer sheet 37 and the inner layer sheet 38 via an adhesive. Thus, a front crotch gather G4 is formed in the front crotch part E.

本実施形態のおむつ３０においては、胴回りギャザーＧ１及びウエストギャザーＧ２が、前述した伸縮性複合シート１（図１参照）から形成されている。このため、おむつ３０は、特に、着用者の胴回り部及びウエスト部に配される部分が柔軟で感触が柔らかく、通気性及び肌触りが良好である。
尚、本発明においては、少なくとも胴回りギャザーＧ１が伸縮性複合シート１から形成されているが、本実施形態のように、他のギャザーＧ２〜Ｇ４の何れか１つ以上が伸縮性複合シート１から形成されていてもよい。 In the diaper 30 of this embodiment, the waistline gather G1 and the waist gather G2 are formed from the elastic composite sheet 1 (see FIG. 1) described above. For this reason, especially the diaper 30 has a soft and soft feel at the portions arranged on the waist and waist of the wearer, and has good breathability and touch.
In the present invention, at least the waistline gather G1 is formed from the stretchable composite sheet 1. However, as in the present embodiment, any one or more of the other gathers G2 to G4 is from the stretchable composite sheet 1. It may be formed.

前記ギャザーＧ１〜Ｇ４が伸縮性複合シート１から形成されている場合、該ギャザーを構成する外層シート３７及び内層シート３８としては、伸縮性複合シート１を構成する前記シート材２，３と同様のものを用いることができ、また、各ギャザーを構成する弾性部材２３，２４，２５，２６としては、伸縮性複合シート１を構成する前記弾性部材４と同様のものを用いることができる。 When the gathers G1 to G4 are formed from the stretchable composite sheet 1, the outer layer sheet 37 and the inner layer sheet 38 constituting the gather are the same as the sheet materials 2 and 3 constituting the stretchable composite sheet 1. In addition, as the elastic members 23, 24, 25, and 26 constituting each gather, the same members as those of the elastic member 4 constituting the stretchable composite sheet 1 can be used.

また、本発明の伸縮性複合シートは、その良好な柔軟性や通気性等の利点を活かし、吸収性物品以外の用途、例えば着用物品や清掃シート等の各種の用途にも好適に用いられる。着用物品とは、衣類のうち、吸収体を具備する吸収性物品を除いたものであり、具体的には、外科用衣類、使い捨て下着、生理用ショーツ、サポーター、キャップ、ヘアバンド、包帯等が挙げられる。本発明の伸縮性複合シートは、これら各種用途において、特に伸縮部形成用として好適に用いられる。着用物品の具体例として、使い捨てショーツが挙げられる。使い捨てショーツは、例えば、図１２及び図１３に示す如きパンツ型の使い捨ておむつ３０において、吸収性本体３２を取り除いた構成を有している。斯かる構成を有する使い捨てショーツに、本発明の伸縮性複合シートを適用した具体例としては、次のものが挙げられる。即ち、外包材３３を備え、長手方向に腹側部Ａ、股下部Ｃ及び背側部Ｂに区分されており、該腹側部Ａ及び該背側部Ｂの両側縁部同士が接合されて一対のサイドシール部３４，３４、ウエスト開口部３５及び一対のレッグ開口部３６，３６が形成されているパンツ型であって、前記外包材３３の腹側部Ａ及び背側部Ｂにおける胴回り部Ｄに、上述した本発明の伸縮性複合シートから形成された胴回りギャザーＧ１が設けられている使い捨てショーツが挙げられる。 Further, the stretchable composite sheet of the present invention is suitably used for various uses other than absorbent articles, such as worn articles and cleaning sheets, taking advantage of its good flexibility and breathability. Wearable articles are clothes that exclude absorbent articles that have an absorbent body. Specifically, surgical clothes, disposable underwear, sanitary shorts, supporters, caps, hair bands, bandages, etc. Can be mentioned. The stretchable composite sheet of the present invention is suitably used particularly for forming stretchable parts in these various uses. A disposable short is mentioned as a specific example of a wearing article. The disposable shorts has, for example, a configuration in which the absorbent main body 32 is removed from a pants-type disposable diaper 30 as shown in FIGS. 12 and 13. Specific examples in which the stretchable composite sheet of the present invention is applied to the disposable shorts having such a configuration include the following. That is, it is provided with an outer packaging material 33 and is divided into abdominal side A, crotch C and back side B in the longitudinal direction, and both side edges of the abdominal side A and back side B are joined together. A pant-type in which a pair of side seal portions 34, 34, a waist opening 35 and a pair of leg openings 36, 36 are formed, and a waistline portion on the ventral side A and the back side B of the outer packaging material 33 Examples of D include disposable shorts provided with a waistline gather G1 formed from the stretchable composite sheet of the present invention described above.

以上、本発明をその好ましい実施形態に基づき説明したが、本発明は、上述した実施形態に制限されない。
例えば、伸縮性複合シート中の弾性部材の本数は、伸縮性複合シートの寸法や用途に応じて適宜に決定し得るが、例えば５〜３０本とすることができる。接合領域５の平面視における形状は、矩形、正方形の他、長円、円、菱形等の適宜の形状とすることができる。また、接合領域５においては、接合部７及び非接合部８が、伸縮方向Ｘ及び直交方向Ｙのうちの少なくとも一方向に交互に配されていれば良く、接合部７及び非接合部８の斯かる配置形態が維持されるのであれば、接着剤をスパイラル状やΩ状に塗布して接合領域５を形成しても良い。即ち、接合部７は、平面視でスパイラル状やΩ状に形成されていても良い。
また、本発明の伸縮性複合シートを吸収性物品に用いる場合、該吸収性物品は、前記実施形態のように使い捨ておむつに限定されず、生理用ナプキン、パンティライナー（おりものシート）、失禁パッド等を包含する。
また、上述した一の実施形態のみが有する要件は、それぞれ他の実施形態に適宜適用することができ、また、各実施形態における要件は、適宜、実施形態間で相互に置換可能である。 As mentioned above, although this invention was demonstrated based on the preferable embodiment, this invention is not restrict | limited to embodiment mentioned above.
For example, the number of elastic members in the stretchable composite sheet can be appropriately determined according to the size and use of the stretchable composite sheet, but can be 5 to 30, for example. The shape of the bonding region 5 in a plan view can be an appropriate shape such as an ellipse, a circle, or a rhombus in addition to a rectangle and a square. Moreover, in the junction area | region 5, the junction part 7 and the non-joint part 8 should just be alternately distribute | arranged to at least one direction of the expansion-contraction direction X and the orthogonal direction Y, and the junction part 7 and the non-joint part 8 of FIG. If such an arrangement is maintained, the bonding region 5 may be formed by applying an adhesive in a spiral or Ω shape. That is, the joint portion 7 may be formed in a spiral shape or an Ω shape in plan view.
Further, when the stretchable composite sheet of the present invention is used for an absorbent article, the absorbent article is not limited to a disposable diaper as in the above embodiment, but a sanitary napkin, a panty liner (origami sheet), an incontinence pad. Etc.
In addition, the requirements of only one embodiment described above can be applied to other embodiments as appropriate, and the requirements in each embodiment can be appropriately interchanged between the embodiments.

図１は、本発明の第１実施形態としての伸縮性複合シートを一部破断して示す斜視図である。FIG. 1 is a perspective view showing a partially broken elastic composite sheet as a first embodiment of the present invention. 図２は、図１に示す伸縮性複合シートを、弾性部材を伸張させ平面状に拡げた状態を示す平面図である。FIG. 2 is a plan view showing a state in which the elastic composite sheet shown in FIG. 1 is expanded in a flat shape by stretching an elastic member. 図３は、図１に示す伸縮性複合シートにおける接合領域を拡大して示す平面図である。FIG. 3 is an enlarged plan view showing a joining region in the stretchable composite sheet shown in FIG. 図４は、本発明の範囲外の接合領域を拡大して示す平面図である。FIG. 4 is an enlarged plan view showing a bonding region outside the scope of the present invention. 図５は、本発明の伸縮性複合シートの製造方法の一実施形態の要部を示す斜視図である。FIG. 5 is a perspective view showing an essential part of one embodiment of the method for producing a stretchable composite sheet of the present invention. 図６は、本発明の第２実施形態としての伸縮性複合シートの製造方法の実施形態の要部を示す斜視図である。FIG. 6: is a perspective view which shows the principal part of embodiment of the manufacturing method of the elastic composite sheet as 2nd Embodiment of this invention. 図７は、本発明の第２実施形態としての伸縮性複合シートの製造方法の他の実施形態の要部を示す斜視図である。FIG. 7: is a perspective view which shows the principal part of other embodiment of the manufacturing method of the elastic composite sheet as 2nd Embodiment of this invention. 図８は、本発明の第２実施形態としての伸縮性複合シートの製造方法の更に他の実施形態の要部を示す斜視図である。FIG. 8: is a perspective view which shows the principal part of other embodiment of the manufacturing method of the elastic composite sheet as 2nd Embodiment of this invention. 図９は、本発明の第２実施形態としての伸縮性複合シートの製造方法の別の実施形態の要部を示す斜視図である。FIG. 9: is a perspective view which shows the principal part of another embodiment of the manufacturing method of the elastic composite sheet as 2nd Embodiment of this invention. 図１０は、本発明の第３実施形態としての伸縮性複合シートの図３相当図である。FIG. 10 is a view corresponding to FIG. 3 of the stretchable composite sheet as the third embodiment of the present invention. 図１１（ａ）は、第４実施形態としての伸縮性複合シートの要部の平面図（一部の構成部材の図示を省略）、図１１（ｂ）は、第５実施形態としての伸縮性複合シートの要部の平面図（一部の構成部材の図示を省略）、図１１（ｃ）は、第６実施形態としての伸縮性複合シートの要部の平面図（一部の構成部材の図示を省略）である。FIG. 11A is a plan view of a main part of a stretchable composite sheet as a fourth embodiment (illustration of some components is omitted), and FIG. 11B is a stretchability as a fifth embodiment. The top view of the principal part of a composite sheet (illustration of a one part component is abbreviate | omitted), FIG.11 (c) is the top view (a part of component member of a stretchable composite sheet as 6th Embodiment). (Not shown). 図１２は、本発明の一実施形態としてのパンツ型使い捨ておむつを示す斜視図である。FIG. 12 is a perspective view showing a pants-type disposable diaper as an embodiment of the present invention. 図１３は、図１２に示す使い捨ておむつを展開し、伸長した状態を示す平面図である。FIG. 13 is a plan view showing a state in which the disposable diaper shown in FIG. 12 is expanded and extended.

Explanation of symbols

１伸縮性複合シート
２，３シート材
４弾性部材
５接合領域
６襞
７接合部
８非接合部
３０吸収性物品（使い捨ておむつ）
３１吸収性コア
３２吸収性本体
３３外包材
４０第１シート連続体
４０ａ第１シート連続体の一面
４１，４５接着剤塗布部
４２第２シート連続体
５０弾性部材の伸縮方向に沿う接合ライン
５１弾性部材の伸縮方向と直交する直交方向に沿う接合ライン
６０接着剤塗布手段
６１塗布ロール
６１ａ塗布ロールのロール外周面
Ａ腹側部
Ｂ背側部
Ｃ股下部
Ｄ胴回り部
Ｇ１胴回りギャザー
Ｘ弾性部材の伸縮方向
Ｙ弾性部材の伸縮方向と直交する直交方向 DESCRIPTION OF SYMBOLS 1 Elastic composite sheet 2,3 Sheet material 4 Elastic member 5 Joining area | region 6 襞 7 Joining part 8 Non-joining part 30 Absorbent article (disposable diaper)
31 Absorbent core 32 Absorbent main body 33 Outer packaging material 40 First sheet continuous body 40a One surface 41, 45 of the first sheet continuous body Adhesive application part 42 Second sheet continuous body 50 Joining line 51 along the expansion / contraction direction of the elastic member Elasticity Joining line 60 along the orthogonal direction perpendicular to the expansion / contraction direction of the member Adhesive application means 61 Application roll 61a Roll outer peripheral surface A of the application roll A side part B back part C crotch part D waist part G1 waist part gather X Elastic member expansion and contraction Direction Y Orthogonal direction orthogonal to the expansion and contraction direction of the elastic member

Claims

A stretchable composite sheet comprising two sheet materials and a plurality of elastic members disposed between the two sheet materials,
The two sheet materials are joined in a plurality of joining regions, and the joining regions are intermittently arranged in the stretching direction of the elastic member and are orthogonal to the stretching direction. Are arranged intermittently or continuously, and a plurality of joining lines each formed of a plurality of the joining regions are formed along both the stretching direction and the orthogonal direction.
Each of the plurality of bonding regions has a bonding portion where the two sheet materials are bonded, and a non-bonding portion where the sheet material is not bonded, and the bonding portion and the non-bonding portion are Alternately arranged in at least one of the stretch direction and the orthogonal direction,
Each of the plurality of elastic members is arranged so as to overlap with the joining portion in each joining region constituting the joining line along the expansion / contraction direction, and is fixed between the two sheet materials at the joining portion. And
The stretchable composite sheet in which each of the two sheet materials forms a crease between joining lines along the orthogonal direction.

The stretchable composite sheet according to claim 1, wherein the joint portion is formed in a dot shape in a plan view.

The stretchable composite sheet according to claim 1, wherein the joint portion is formed in a straight line extending in a crossing direction (excluding the orthogonal direction) intersecting the stretchable direction in a plan view.

The coating amount of the adhesive in the bonding region, stretchable composite sheet according to claim 1 is 0.5 to 50 g / m ²

It is a manufacturing method of the elastic composite sheet according to claim 1,
A step of applying a plurality of adhesive application portions by applying an adhesive in an arrangement pattern of the joining region to one surface of the first sheet continuous body being conveyed by an adhesive application means, and bonding a plurality of elastic members to the one surface A step of arranging the first sheet continuous body in an extended state so as to overlap with the agent application portion, and a second sheet separate from the first sheet continuous body on one surface of the first sheet continuous body A process of superimposing the continuum,
The adhesive application means includes an application roll whose outer peripheral surface is in contact with one surface of the first sheet continuous body during application of the adhesive, and transports the application roll to the first sheet continuous body. The plurality of adhesive application portions are supplied by supplying an adhesive from the outer peripheral surface of the roll to the one surface while rotating the outer peripheral surface of the roll in contact with the one surface while rotating in the circumferential direction at the same speed as the speed. A method for producing a stretchable composite sheet in which the above pattern is formed.

The stretchability according to claim 5, wherein an adhesive is applied to a polymerization surface of the second sheet continuum with the first sheet continuum before the second sheet continuum is overlaid on the first sheet continuum. A method for producing a composite sheet.

An absorbent article using the stretchable composite sheet according to claim 1.

The absorbent article includes an absorbent main body including an absorbent core and an outer packaging material joined to the non-skin-contacting surface side of the absorbent main body, and is provided on the abdominal side, crotch, and back side in the longitudinal direction. It is a pants type in which both side edges of the ventral side and the back side are joined together to form a pair of side seal parts, a waist opening and a pair of leg openings,
The absorbent article according to claim 7, wherein a waistline gather formed from the stretchable composite sheet according to claim 1 is provided at a waistline part in the abdomen side part and the back side part of the outer packaging material.

A wearing article using the stretchable composite sheet according to claim 1.