JP5999889B2

JP5999889B2 - Pants-type absorbent article

Info

Publication number: JP5999889B2
Application number: JP2011264703A
Authority: JP
Inventors: 藍子恩田; 佐々木　純; 純佐々木
Original assignee: Kao Corp
Current assignee: Kao Corp
Priority date: 2011-12-02
Filing date: 2011-12-02
Publication date: 2016-09-28
Anticipated expiration: 2031-12-02
Also published as: JP2013116196A

Description

本発明は、パンツ型吸収性物品に関する。 The present invention relates to a pants-type absorbent article.

従来、吸収体を含む吸収性本体と、該吸収性本体の外面側に位置する外装体とを具備し、腹側部の外装体の両側部と背側部の外装体の両側部とが接合されて、一対のサイドシール部、ウエスト開口部及び一対のレッグ開口部が形成されているパンツ型の使い捨ておむつが知られている。
また、このようなパンツ型使い捨ておむつとして、外装体を構成するシート材を、ウエスト開口部の周縁端に沿って物品内面側に折り返し、その折り返し部分で、吸収性本体の内面を被覆することにより、吸収性本体の端部が着用者の肌に接触することによる違和感を防止したり、吸収性ポリマー等の吸収体の材料が漏れ出すことを防止したり技術も提案されている（特許文献１参照）。 Conventionally, an absorbent main body including an absorbent body and an exterior body positioned on the outer surface side of the absorbent main body are provided, and both sides of the exterior body on the abdominal side and both sides of the exterior body on the back side are joined. A pants-type disposable diaper in which a pair of side seal portions, a waist opening portion, and a pair of leg opening portions are formed is known.
Further, as such a pants-type disposable diaper, the sheet material constituting the exterior body is folded back toward the inner surface of the article along the peripheral edge of the waist opening, and the folded portion covers the inner surface of the absorbent main body. In addition, a technique has also been proposed in which the end of the absorbent main body prevents a sense of incongruity due to contact with the skin of the wearer, or the absorption material such as the absorbent polymer is prevented from leaking (Patent Document 1). reference).

特許文献１の技術は、外装体を構成するシート材の折り返し部分を、吸収性本体の幅方向に延びる接着剤塗布部で、吸収性本体の長手方向に間欠的に対向面に接合することにより、ウエスト部の柔軟性を高めたり、ウエスト部に折れが生じにくいようにするものである。 The technique of patent document 1 is by joining the folding | turning part of the sheet | seat material which comprises an exterior body to an opposing surface intermittently in the longitudinal direction of an absorptive main body by the adhesive agent application part extended in the width direction of an absorptive main body. It is intended to increase the flexibility of the waist part or to prevent the waist part from being broken.

特開２００９−１１８９８６号公報JP 2009-118986 A

しかし、使い捨ておむつ等に要求される性能は年々向上しており、ウエスト部の柔軟性や履き心地等を一層向上させたパンツ型吸収性物品の提供が望まれる。 However, the performance required for disposable diapers and the like has improved year by year, and it is desired to provide a pant-type absorbent article that further improves the flexibility and comfort of the waist.

従って、本発明の課題は、吸収性本体の端部が肌に接することによる違和感の発生を防止できると共に、ウエスト部の柔軟性が高く、ウエスト部と肌とが擦れる（こすれる）ことも抑制可能なパンツ型吸収性物品を提供することにある。 Therefore, the problem of the present invention is that it is possible to prevent the discomfort caused by the end of the absorbent main body coming into contact with the skin, and the waist portion is highly flexible, and the waist portion and the skin can be prevented from being rubbed (rubbed). It is in providing a pants type absorbent article.

本発明は、吸収体を含む吸収性本体と、該吸収性本体の外面側に位置する外装体とを具備し、腹側部の外装体の両側部と背側部の外装体の両側部とが接合されて、一対のサイドシール部、ウエスト開口部及び一対のレッグ開口部が形成されているパンツ型吸収性物品であって、少なくとも腹側部の外装体を構成するシート材が、ウエスト開口部の周縁端に沿って物品内面側に折り返され、その折り返し部分の一部が、該吸収性本体の端部の内面を被覆しており、前記シート材の前記折り返し部分は、前記吸収性本体の周縁固定部分が相対向面に接合されている一方、前記サイドシール部近傍、該周縁固定部分及び前記吸収性本体の内面被覆部分以外の部分が相対向面に接合されていない、パンツ型吸収性物品を提供するものである。 The present invention comprises an absorbent main body including an absorbent body and an exterior body positioned on the outer surface side of the absorbent main body, and both sides of the exterior body on the abdominal side and both sides of the exterior body on the back side, Is a pants-type absorbent article in which a pair of side seal parts, a waist opening part, and a pair of leg opening parts are formed, and the sheet material constituting at least the ventral side exterior body is a waist opening The inner side of the article is folded along the peripheral edge of the part, and a part of the folded part covers the inner surface of the end part of the absorbent main body, and the folded part of the sheet material is the absorbent main body Pants-type absorption, wherein the peripheral fixed part of the outer periphery is joined to the opposing surface, but the vicinity of the side seal part, the peripheral fixed part and the inner surface covering part of the absorbent main body are not joined to the opposing face It provides a sex product.

本発明のパンツ型吸収性物品は、吸収性本体の端部が肌に接することによる違和感の発生を防止できると共に、ウエスト部の柔軟性が高く、ウエスト部と肌とが擦れる（こすれる）ことも抑制可能である。 The pant-type absorbent article of the present invention can prevent the occurrence of a sense of incongruity due to the end of the absorbent main body coming into contact with the skin, and the waist part is highly flexible, and the waist part and the skin may be rubbed (rubbed). It can be suppressed.

図１は、本発明の第１実施形態であるパンツ型使い捨ておむつの使用状態（着用状態）を示す斜視図である。FIG. 1 is a perspective view showing a usage state (wearing state) of a pants-type disposable diaper according to the first embodiment of the present invention. 図２は、図１に示すパンツ型使い捨ておむつの展開且つ伸長状態を示す一部破断平面図である。展開且つ伸長状態とは、おむつの両側部に存する接合部（サイドシール部）を引き剥がして、パンツ型吸収性物品を展開状態とし、その展開状態の吸収性物品を、各部の弾性部材を伸長させて、設計寸法（弾性部材の影響を一切排除した状態で平面状に広げたときの寸法と同じ）となるまで拡げた状態をいう。FIG. 2 is a partially broken plan view showing a developed and extended state of the pants-type disposable diaper shown in FIG. In the expanded and extended state, the joints (side seal portions) existing on both sides of the diaper are peeled off to make the pant-type absorbent article in the expanded state, and the expanded absorbent article is stretched with the elastic members in each part. It is a state where it is expanded to the design dimension (same as the dimension when it is expanded in a flat shape with no influence of the elastic member). 図３は、図１に示すパンツ型使い捨ておむつの腹側部側をおむつ外面側から見た一部破断拡大図である。FIG. 3 is a partially broken enlarged view of the abdomen side of the pant-type disposable diaper shown in FIG. 1 as viewed from the outer surface side of the diaper. 図４は、図２のＩ−Ｉ線断面図である。4 is a cross-sectional view taken along the line II of FIG. 図５は、図２のＩＩ−ＩＩ線断面図である。5 is a cross-sectional view taken along line II-II in FIG. 図６は、図１に示すパンツ型使い捨ておむつにおけるウエスト伸縮部及び胴回り伸縮部のおむつ幅方向に沿う断面を示す図であり、（ａ）は、弾性部材を伸長させて襞をなくした状態、（ｂ）は弾性部材が収縮して襞が形成されている状態を示す図である。FIG. 6 is a diagram showing a cross section along the diaper width direction of the waist stretchable part and the waistline stretchable part in the pants-type disposable diaper shown in FIG. (B) is a figure which shows the state in which the elastic member contracted and the wrinkle was formed. 図７は、本発明の他の実施形態における腹側及び背側外装体を示す図である。FIG. 7 is a view showing a ventral and dorsal exterior body according to another embodiment of the present invention. 図８は、本発明の更に他の実施形態における腹側及び背側外装体を示す図である。FIG. 8 is a view showing an abdominal and dorsal exterior body according to still another embodiment of the present invention.

以下、本発明のパンツ型吸収性物品を、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。
本発明の一実施形態であるパンツ型使い捨ておむつ１（以下、おむつ１ともいう）は、図１及び図２に示すように、吸収体３３を含む吸収性本体３と、該吸収性本体３の外面側に位置する外装体２Ａ，２Ｂとを具備し、腹側部Ａの外装体２Ａの両側部と背側部Ｂの外装体２Ｂの両側部とが接合されて、一対のサイドシール部４，４、ウエスト開口部５及び一対のレッグ開口部６（一方のみ図示）が形成されている。
また、腹側部Ａの外装体２Ａを構成するシート材２０が、ウエスト開口部の周縁端５１に沿って物品内面側に折り返され、その折り返し部分２１の一部２１ａが、該吸収性本体３の端部の内面を被覆している。
そして、前記シート材２０の折り返し部分２１は、吸収性本体３の周縁固定部分２１ｂが相対向面に接合されており、サイドシール部近傍２１ｃ、該周縁固定部分２１ｂ及び吸収性本体３の内面被覆部分２１ａ以外の部分が相対向面に接合されていない。図２には、シート材２０の折り返し部分２１が、その相対向面に接合されている部分を斜線部で示してある。
吸収性物品及びその構成部材の内面は、着用時に着用者の肌側に向けられる面であり、吸収性物品及びその構成部材の外面は、着用時に着用者の肌側とは反対側に向けられる面である。 Hereinafter, the underpants type absorbent article of the present invention will be described based on preferred embodiments with reference to the drawings.
As shown in FIGS. 1 and 2, a pants-type disposable diaper 1 (hereinafter also referred to as diaper 1) that is an embodiment of the present invention includes an absorbent main body 3 including an absorbent body 33, and an absorbent main body 3. The exterior body 2A, 2B located on the outer surface side is provided, and both sides of the exterior body 2A on the abdominal side A and both sides of the exterior body 2B on the back side B are joined together to form a pair of side seal parts 4 4, a waist opening 5 and a pair of leg openings 6 (only one is shown).
Further, the sheet material 20 constituting the exterior body 2A of the abdominal side A is folded back toward the inner surface of the article along the peripheral edge 51 of the waist opening, and a part 21a of the folded portion 21 is formed on the absorbent main body 3. It covers the inner surface of the end portion.
The folded portion 21 of the sheet material 20 has a peripheral fixing portion 21b of the absorbent main body 3 joined to the opposing surface, and the side seal portion vicinity 21c, the peripheral fixed portion 21b, and the inner covering of the absorbent main body 3 Parts other than the part 21a are not joined to the opposing surfaces. In FIG. 2, a portion where the folded portion 21 of the sheet material 20 is joined to the facing surface is indicated by a hatched portion.
The inner surface of the absorbent article and its constituent members is a face directed toward the wearer's skin when worn, and the outer surface of the absorbent article and its constituent members is directed to the opposite side of the wearer's skin when worn. Surface.

本実施形態のおむつ１について、より具体的に説明すると、おむつ１は、図１及び図２に示すように、着用時に、着用者の腹側に配される腹側部Ａと、着用者の背側に配される背側部Ｂと、腹側部Ａと背側部Ｂとの間に位置し、着用者の股間部に配される股下部Ｃを有しており、外装体として、腹側部Ａの外面を形成する腹側外装体２Ａと背側部Ｂの外面を形成する背側外装体２Ｂとを有している。腹側外装体２Ａ及び背側外装体２Ｂは、図２に示す如く矩形状である。 The diaper 1 of the present embodiment will be described more specifically. The diaper 1 is, as shown in FIGS. 1 and 2, the abdominal side portion A disposed on the wearer's ventral side when worn, and the wearer's side. It has a crotch part C located between the back side part B arranged on the back side, the abdomen side part A and the back side part B, and arranged on the wearer's crotch part, It has an abdominal exterior body 2A that forms the outer surface of the abdominal side part A and a back side exterior body 2B that forms the outer surface of the back side part B. The abdominal exterior body 2A and the back exterior body 2B are rectangular as shown in FIG.

本実施形態のおむつ１において、腹側外装体２Ａ及び背側外装体２Ｂを構成するシート材２０は、何れも、図３に示すように、散点状に形成された多数の融着部２６で互いに接合している２枚のシート２２，２３と、該融着部２６を通らないように配された複数本の弾性部材２４とを備えている。
本実施形態のおむつ１における、腹側外装体２Ａと背側外装体２Ｂとは同様の構成を有している。そのため、以下においては、腹側外装体２Ａ及び背側外装体２Ｂの構成について、主として腹側外装体２Ａを例にして説明するが、背側外装体２Ｂについても同様の説明が適用される。 In the diaper 1 of the present embodiment, the sheet material 20 constituting the abdominal exterior body 2A and the back exterior body 2B each has a large number of fused portions 26 formed in the form of dots as shown in FIG. Are provided with two sheets 22 and 23 joined to each other, and a plurality of elastic members 24 arranged so as not to pass through the fused portion 26.
In the diaper 1 of the present embodiment, the ventral exterior body 2A and the back exterior body 2B have the same configuration. Therefore, in the following, the configuration of the abdominal exterior body 2A and the back exterior body 2B will be described mainly using the abdominal exterior body 2A as an example, but the same description applies to the back side exterior body 2B.

腹側外装体２Ａは、図３に示すように、前記２枚のシート２２，２３として、おむつ１の外面を形成する外層シート２２と外層シート２２に隣接してその内面側に位置する内層シート２３とを有している。 As shown in FIG. 3, the ventral exterior body 2 A includes an outer layer sheet 22 that forms the outer surface of the diaper 1 as the two sheets 22 and 23, and an inner layer sheet that is adjacent to the outer layer sheet 22 and located on the inner surface side thereof. 23.

また、腹側外装体２Ａを構成するシート材２０は、図４及び図５に示すように、ウエスト開口部５の開口部の周縁端５１において、おむつ１の内面が折り返されており、その折り返しにより形成された折り返し部分２１を有している。
より詳細には、外層シート２２及び内層シート２３の何れもが、図４及び図５に示すように、ウエスト開口部の周縁端５１において、おむつ１の内面が折り返されている。また、外層シート２２の折り返し部分２２ａの長さが、内層シート２３の折り返し部分２３ａの長さより長くなっており、シート材２０の折り返し部分２１には、外層シート２２の折り返し部分２２ａと内層シート２３の折り返し部分２３ａとが積層された２層部分と、外層シート２２の折り返し部分２２ａのみからなる単層部分とが形成されている。２層部分には、ウエスト伸縮部Ｇ１から融着部列が連続して形成されており、それらの融着部列を構成する融着部２６において、２枚のシート２２，２３の折り返し部分２２ａ，２３ａ間が接合されている。 Moreover, as shown in FIG.4 and FIG.5, the sheet | seat material 20 which comprises the ventral | abdominal exterior body 2A has the inner surface of the diaper 1 folded in the peripheral edge 51 of the opening part of the waist opening part 5, It has the folding | turning part 21 formed by.
More specifically, as shown in FIGS. 4 and 5, the outer layer sheet 22 and the inner layer sheet 23 both have the inner surface of the diaper 1 folded at the peripheral edge 51 of the waist opening. Further, the length of the folded portion 22a of the outer layer sheet 22 is longer than the length of the folded portion 23a of the inner layer sheet 23, and the folded portion 21 of the sheet material 20 includes A two-layer portion in which the folded portions 23 a are laminated and a single-layer portion composed of only the folded portions 22 a of the outer layer sheet 22 are formed. In the two-layer portion, a fused portion row is continuously formed from the waist stretchable portion G1, and the folded portion 22a of the two sheets 22 and 23 is formed in the fused portion 26 constituting the fused portion row. , 23a are joined together.

腹側外装体２Ａを構成するシート材２０は、図４及び図５に示すように、ウエスト開口部５の周縁端５１において、おむつ１の内面が折り返されており、その折り返しにより形成された折り返し部分２１を有している。折り返し部分２１は、ウエスト開口部５の周縁端５１から股下部Ｃ方向に延びている。本実施形態においては、矩形状を有している。背側外装体２Ｂを構成するシート材２０についても同様である。 As shown in FIGS. 4 and 5, the sheet material 20 constituting the ventral-side exterior body 2 A has the inner surface of the diaper 1 folded at the peripheral edge 51 of the waist opening 5, and the folded back formed by the folding. It has a portion 21. The folded portion 21 extends from the peripheral edge 51 of the waist opening 5 in the crotch portion C direction. In this embodiment, it has a rectangular shape. The same applies to the sheet material 20 constituting the backside exterior body 2B.

そして、シート材２０の折り返し部分２１は、図２及び図４に示すように、吸収性本体３の周縁固定部分２１ｂが、相対向面に接合されている。相対向面は、シート材２０を折り返すことによって、相対向することなった面である。また、吸収性本体３の周縁固定部分２１ｂは、吸収性本体３の周縁を、シート材２０の折り返していない部分に固定する部分であり、本実施形態においては、図２に示すように、吸収性本体３の周縁と重なり該周縁の内外に亘る所定幅の部分である。そして、本実施形態における周縁固定部分２１ｂは、吸収性本体３の周縁部の内面と重なる部分が、その相対向面である該吸収性本体３の内面上に接着剤７１を介して接合され、吸収性本体３の周縁より外方に延出する部分においても、その相対向面である内層シート２３の内面（折り返されていない部分の内面）に接着剤７１を介して接合されている。周縁固定部分２１ｂは、吸収性本体３の周縁より外方に位置する部分の幅が３〜３０ｍｍ、特に５〜２５ｍｍであることが好ましい。 And as shown in FIG.2 and FIG.4, the periphery fixing | fixed part 21b of the absorptive main body 3 has joined the folding | returning part 21 of the sheet | seat material 20 to the opposing surface. The facing surfaces are surfaces that have been opposed to each other by folding the sheet material 20 back. Further, the peripheral edge fixing portion 21b of the absorbent main body 3 is a portion that fixes the peripheral edge of the absorbent main body 3 to a portion of the sheet material 20 that is not folded back. In this embodiment, as shown in FIG. It is a portion having a predetermined width that overlaps with the periphery of the sex main body 3 and extends inside and outside the periphery. And as for the peripheral fixed part 21b in this embodiment, the part which overlaps with the inner surface of the peripheral part of the absorptive main body 3 is joined via the adhesive 71 on the inner surface of this absorptive main body 3 which is the opposing surface, Even in a portion that extends outward from the peripheral edge of the absorbent main body 3, the inner surface of the inner layer sheet 23 that is the opposite surface (the inner surface of the portion that is not folded back) is joined via an adhesive 71. It is preferable that the periphery fixing | fixed part 21b is 3-30 mm in width | variety of the part located outside from the periphery of the absorptive main body 3, especially 5-25 mm.

また、本実施形態のおむつ１におけるシート材２０の折り返し部分２１は、図２に示すように、サイドシール部近傍２１ｃにおいても、その相対向面である内層シート２３の折り返されていない部分に接着剤（不図示）を介して接合されている。サイドシール部近傍２１ｃは、腹側部Ａの外装体２Ａと背側部Ｂの外装体２Ｂとが互いに接合された部分であるサイドシール部４に位置する部分とその近傍を含む概念である。本実施形態における腹側及び背側外装体２Ａ，２Ｂの折り返し部分２１は、サイドシール部４に位置する部分と該サイドシール部４に近接する所定幅の部分（サイドシール部の近傍部）が、それらが相対向する内層シート２３の内面（折り返されていない部分の内面）に接合されている。 Further, as shown in FIG. 2, the folded portion 21 of the sheet material 20 in the diaper 1 of the present embodiment is bonded to the unfolded portion of the inner layer sheet 23 that is the opposite surface also in the vicinity of the side seal portion 21 c. It is joined via an agent (not shown). The side seal portion vicinity 21c is a concept including a portion located in the side seal portion 4 that is a portion where the exterior body 2A of the abdominal portion A and the exterior body 2B of the back side portion B are joined to each other and the vicinity thereof. In the present embodiment, the folded portion 21 of the ventral and back exterior bodies 2A, 2B has a portion located in the side seal portion 4 and a portion having a predetermined width close to the side seal portion 4 (a portion near the side seal portion). , They are joined to the inner surface (the inner surface of the unfolded portion) of the inner layer sheet 23 facing each other.

また、本実施形態のおむつ１におけるシート材２０の折り返し部分２１は、図２及び図４に示すように、吸収性本体３の周縁近傍に形成された周縁固定部分２１ｂよりも内方（Ｘ方向及びＹ方向の内方）に位置する部分２１ａ’も、相対向面である吸収性本体３の内面に接着剤７２を介して接合されており、その結果、吸収性本体３の内面を被覆する部分２１ａの全域が、その相対向面である吸収性本体３の内面に接着剤７１を介して接合されている。接着剤７１と接着剤７２とは、同じ種類の接着剤でも良いし、異なる種類の接着剤でも良い。また、接着剤７１と接着剤７２とは、連続して同時に塗っても良いし、別々に塗っても良い。 Moreover, as shown in FIG.2 and FIG.4, the folding | turning part 21 of the sheet | seat material 20 in the diaper 1 of this embodiment is inward (X direction) rather than the periphery fixing | fixed part 21b formed in the periphery vicinity of the absorptive main body 3. And the portion 21 a ′ located inward in the Y direction are also bonded to the inner surface of the absorbent main body 3 which is the opposite surface via the adhesive 72, and as a result, covers the inner surface of the absorbent main body 3. The entire area of the portion 21 a is joined to the inner surface of the absorbent main body 3, which is the opposite surface, via an adhesive 71. The adhesive 71 and the adhesive 72 may be the same type of adhesive or different types of adhesive. Further, the adhesive 71 and the adhesive 72 may be applied simultaneously in succession, or may be applied separately.

他方、本実施形態のおむつ１におけるシート材２０の折り返し部分２１は、図２、図４及び図５に示すように、サイドシール部４近傍２１ｃ、周縁固定部分２１ｂ及び吸収性本体の内面被覆部分２１ａ以外の部分は、相対向する内層シート２３の内面（折り返されていない部分の内面）に接合されていない。
おむつ１におけるシート材２０の折り返し部分２１は、周縁固定部分２１ｂより外方に位置する部分（より詳細には、周縁固定部分２１ｂとサイドシール部近傍２１ｃの接合部分との間）におけるレッグ開口部側の端縁が接合されていない。 On the other hand, the folded portion 21 of the sheet material 20 in the diaper 1 of the present embodiment includes a side seal portion 4 vicinity 21c, a peripheral edge fixing portion 21b, and an inner surface covering portion of the absorbent main body, as shown in FIGS. Portions other than 21a are not joined to the inner surface (the inner surface of the unfolded portion) of the inner layer sheet 23 facing each other.
The folded-back portion 21 of the sheet material 20 in the diaper 1 is a leg opening in a portion positioned more outward than the peripheral fixed portion 21b (more specifically, between the peripheral fixed portion 21b and the joint portion in the vicinity of the side seal portion 21c). Side edges are not joined.

本実施形態のおむつ１においては、このように、腹側外装体２Ａ及び背側外装体２Ｂそれぞれにおけるシート材２０の折り返し部分２１が、サイドシール部４近傍、周縁固定部分２１ｂ及び吸収性本体の内面被覆部分２１ａ以外の部分において、相対向面に接合されていないことによって、腹側部Ａ及び背側部ＢそれぞれのウエストＤに、折り返し部分２１がその相対向面に接合されていない所定幅の柔軟な領域が形成されていると共に、腹側部Ａ及び背側部Ｂそれぞれの胴回り部Ｅにおける、吸収性本体３の両側縁それぞれの外方にも、折り返し部分２１がその相対向面に接合されていない柔軟な領域が形成されている。
そのため、本実施形態のおむつ１は、腹側部Ａ及び背側部Ｂそれぞれのウエスト部Ｄの柔軟性が高く、履き心地が良好である。また、幼児の親や介護者等が、おむつを履かせる際にも手触りが良く、着用者のはき心地のよさを想起できるとともに、自身も心地の良い気分でおむつ交換を行うことができる。
また、ウエスト部Ｄの内面が肌と擦れる（こすれる）ことも抑制され、擦れることによって、肌に赤みを生じたり、傷をつけたりといった不都合が生じることも防止される。 In the diaper 1 of the present embodiment, the folded portion 21 of the sheet material 20 in each of the abdominal exterior body 2A and the back exterior body 2B is in the vicinity of the side seal portion 4, the peripheral edge fixing portion 21b, and the absorbent main body. In a portion other than the inner surface covering portion 21a, a predetermined width at which the folded portion 21 is not joined to the opposite surface on the waist D of the ventral portion A and the back portion B by being not joined to the opposite surface. Are formed on the opposite sides of the opposite sides of the absorbent main body 3 at the waistline E of the abdominal part A and the back part B, respectively. A flexible region that is not joined is formed.
Therefore, the diaper 1 of this embodiment has high flexibility of the waist part D of each of the abdominal part A and the back part B, and the comfort is good. In addition, when an infant's parent or caregiver puts on a diaper, the touch is good, the wearer's comfortable feeling can be recalled, and the diaper can be exchanged in a comfortable feeling.
Further, rubbing (rubbing) the inner surface of the waist portion D with the skin is also suppressed, and it is possible to prevent inconveniences such as redness and scratching on the skin.

他方、腹側外装体２Ａ及び背側外装体２Ｂそれぞれにおけるシート材２０の折り返し部分２１が、吸収性本体３の周縁固定部分２１ｂにおいては、接着剤７１を介して相対向面に接合されている。そのため、吸収性本体３が、折り返し部分２１に被覆された状態が安定に維持されるため、吸収性本体３の端部が肌に接触して、着用者に違和感や不快感を与えることを確実に防止することができる。 On the other hand, the folded portion 21 of the sheet material 20 in each of the ventral-side exterior body 2A and the back-side exterior body 2B is joined to the opposite surface via the adhesive 71 in the peripheral edge fixing portion 21b of the absorbent main body 3. . Therefore, since the state in which the absorbent main body 3 is covered with the folded portion 21 is stably maintained, it is ensured that the end of the absorbent main body 3 comes into contact with the skin and gives the wearer a sense of incongruity or discomfort. Can be prevented.

前述した一又は二以上の効果を得る観点から、シート材２０の折り返し部分２１がその相対向面に接合されていない領域は、ウエスト開口部の周縁端５１と吸収性本体３の長手方向の端部との間の距離Ｌ２（図２参照）が、５〜２００ｍｍ、特に５〜１２０ｍｍであることが好ましく、該距離Ｌ２は、サイドシール部４の同方向の全長Ｌ４（Ｘ方向の長さ，図２参照）の３〜８０％、特に５〜６０％であることが好ましい。また、同様の観点から、シート材２０の折り返し部分２１がその相対向面に接合されていない領域は、吸収性本体３の両側縁及びそのＸ方向延長線より、おむつ幅方向の外方に位置する部分の幅Ｗ１（Ｙ方向の長さ，図２参照）が、腹側部Ａ又は背側部Ｂの全幅Ｗ（Ｙ方向の長さ，図２参照）の１５〜８５％、特に２０〜７５％であることが好ましい。 From the viewpoint of obtaining one or more effects described above, the region where the folded portion 21 of the sheet material 20 is not joined to the facing surface is the peripheral edge 51 of the waist opening and the longitudinal end of the absorbent main body 3. It is preferable that the distance L2 (refer FIG. 2) between the portions is 5 to 200 mm, particularly 5 to 120 mm, and the distance L2 is the total length L4 in the same direction of the side seal portion 4 (the length in the X direction, 3 to 80%, particularly 5 to 60%, of FIG. 2). Further, from the same viewpoint, the region where the folded portion 21 of the sheet material 20 is not joined to the facing surface is positioned outward in the diaper width direction from both side edges of the absorbent main body 3 and its X-direction extension line. The width W1 (the length in the Y direction, see FIG. 2) of the portion to be made is 15 to 85%, particularly 20 to the entire width W (the length in the Y direction, see FIG. 2) of the ventral side A or the back side B. It is preferably 75%.

また、本実施形態のおむつ１においては、腹側外装体２Ａ及び背側外装体２Ｂそれぞれにおけるシート材２０の折り返し部分２１が、周縁固定部分２１ｂのみならず、吸収性本体３の内面被覆部分２１ａの全域において相対向面と接合されているため、吸収体上における折り返し部の剥がれや、剥がれによる吸収体端部の暴露、暴露に付随する吸収体壊れや排泄物のモレの危険性を回避することが出来る。 Moreover, in the diaper 1 of this embodiment, the folding | returning part 21 of the sheet | seat material 20 in each of the ventral | abdominal exterior body 2A and the back | dorsal exterior body 2B is not only the periphery fixing | fixed part 21b but the inner surface covering part 21a of the absorptive main body 3. Because it is bonded to the opposite surface in the whole area, avoids the risk of peeling of the folded part on the absorber, exposure of the end of the absorber due to peeling, breakage of the absorber accompanying exposure, and leakage of excreta I can do it.

本実施形態のおむつ１における腹側外装体２Ａ及び背側外装体２Ｂは、それぞれ、ウエスト伸縮部Ｇ１及び胴回り伸縮部Ｇ２を有している。ウエスト伸縮部Ｇ１及び胴回り伸縮部Ｇ２のそれぞれにおいては、外層シート２２と内層シート２３との間が、散点状に形成された多数の融着部２６において接合されており、弾性部材２４が、それらの融着部２６を通らないように配されている。融着部２６は、外層シート２２と内層シート２３との間が、熱シール加工や超音波シール加工、高周波シール加工等によって熱融着されて形成されてなる。 The abdominal exterior body 2A and the back exterior body 2B in the diaper 1 of the present embodiment have a waist stretchable part G1 and a waistline stretchable part G2, respectively. In each of the waist stretchable part G1 and the waistline stretchable part G2, the outer layer sheet 22 and the inner layer sheet 23 are joined at a large number of fused portions 26 formed in the form of dots, and the elastic member 24 is It arrange | positions so that those fusion | fusion parts 26 may not be passed. The fused portion 26 is formed by heat-sealing between the outer layer sheet 22 and the inner layer sheet 23 by heat sealing, ultrasonic sealing, high frequency sealing, or the like.

ウエスト伸縮部Ｇ１は、腹側部Ａ及び背側部Ｂのそれぞれにおいて、吸収性本体３の長手方向の端部３ａ，３ｂと、ウエスト開口部の周縁端５１との間に形成されている。胴回り伸縮部Ｇ２は、腹側部Ａ及び背側部Ｂのそれぞれにおいて、ウエスト伸縮部Ｇ１よりも股下部Ｃ側に形成されている。腹側部Ａ及び背側部Ｂのそれぞれにおいて、ウエスト伸縮部Ｇ１は、吸収性本体３の長手方向の端部３ａ，３ｂとウエスト開口部の周縁端５１との間の領域であるウエスト部Ｄに形成されており、胴回り伸縮部Ｇ２は、ウエスト伸縮部Ｇ１よりも股下部Ｃ側の胴回り部Ｅに形成されている。 The waist stretchable part G1 is formed between the longitudinal ends 3a and 3b of the absorbent main body 3 and the peripheral edge 51 of the waist opening in each of the ventral part A and the back part B. The waist elastic part G2 is formed on the crotch part C side of the waist elastic part G1 in each of the abdominal part A and the back part B. In each of the ventral side A and the back side B, the waist stretchable part G1 is a waist part D that is a region between the longitudinal ends 3a, 3b of the absorbent main body 3 and the peripheral edge 51 of the waist opening. The waistline stretchable part G2 is formed in the waistline part E on the crotch part C side than the waist stretchable part G1.

ウエスト伸縮部Ｇ１及び胴回り伸縮部Ｇ２には、図３に示すように、おむつ１の縦方向（Ｘ方向）に融着部２６が間欠的に直列配置されてなる接合部列が、おむつ１の幅方向（Ｙ方向）に複数列形成されており、該融着部列どうしは、個々の融着部のＸ方向の位置が一致している。
そして、ウエスト伸縮部Ｇ１及び胴回り伸縮部Ｇ２の何れにおいても、複数本の弾性部材２４が、それぞれ、Ｘ方向において隣り合う融着部２６間を通るように配されている。おむつの縦方向は、腹側部Ａから股下部Ｃを経て背側部Ｂに亘る方向又はその逆方向（図中Ｘ方向）であり、おむつの幅方向は、縦方向と交差する方向（図中Ｙ方向）である。 As shown in FIG. 3, the waist stretchable part G 1 and the waist stretchable part G 2 include a joint line in which the fusion parts 26 are intermittently arranged in series in the longitudinal direction (X direction) of the diaper 1. A plurality of rows are formed in the width direction (Y direction), and the positions of the individual fused portions in the X direction coincide with each other.
In each of the waist stretchable part G1 and the waistline stretchable part G2, a plurality of elastic members 24 are arranged so as to pass between the adjacent fused parts 26 in the X direction. The vertical direction of the diaper is the direction from the ventral side A to the back side B through the crotch C or the opposite direction (X direction in the figure), and the width direction of the diaper is the direction intersecting the vertical direction (see FIG. Middle Y direction).

腹側外装体２Ａは、図３に示すように、サイドシール部４，４の近傍に、外層シート２２と内層シート２３との間が接着剤を介して接合された側部接着領域２７を有している。また、腹側外装体２Ａは、側部接着領域２７よりおむつ幅方向中央側に、外層シート２２と内層シート２３との間が接着剤を介して接合された吸収性本体側接着領域２８を有している。そして、ウエスト伸縮部Ｇ１に配された複数本の弾性部材２４は、一対の側部接着領域２７それぞれにおいてシート２２，２３間に固定されている一方、側部接着領域２７間においては、シート２２，２３の何れにも固定されていない。他方、胴回り伸縮部Ｇ２に配された複数本の弾性部材２４は、側部接着領域２７及び吸収性本体側接着領域２８のそれぞれにおいてシート２２，２３間に固定されている一方、側部接着領域２７と吸収性本体側接着領域２８との間においては、シート２２，２３の何れにも固定されていない。吸収性本体側接着領域２８は、図３に示すように、吸収性本体３の側縁３ｃの内外に亘るように形成されているが、これに代えて、吸収性本体３の側縁３ｃの位置よりおむつ幅方向の内側（中央側）に形成したり、吸収性本体３の側縁３ｃよりおむつ幅方向の外方に形成することもできる。 As shown in FIG. 3, the ventral exterior body 2A has a side adhesion region 27 in the vicinity of the side seal portions 4 and 4, in which the outer layer sheet 22 and the inner layer sheet 23 are joined via an adhesive. doing. Further, the abdominal exterior body 2A has an absorbent main body-side adhesive region 28 in which the outer layer sheet 22 and the inner layer sheet 23 are bonded to each other in the diaper width direction center side from the side portion adhesive region 27 through an adhesive. doing. The plurality of elastic members 24 arranged on the waist stretchable part G1 are fixed between the sheets 22 and 23 in each of the pair of side adhesion regions 27, while between the side adhesion regions 27, the sheet 22 , 23 is not fixed. On the other hand, a plurality of elastic members 24 arranged in the waistline stretchable part G2 are fixed between the sheets 22 and 23 in the side part adhesive region 27 and the absorbent main body side adhesive region 28, respectively, while the side part adhesive region 27 and the absorbent main body-side adhesive region 28 are not fixed to any of the sheets 22 and 23. As shown in FIG. 3, the absorbent main body side adhesion region 28 is formed so as to extend inside and outside the side edge 3 c of the absorbent main body 3, but instead of this, the side edge 3 c of the absorbent main body 3 is formed. It can also be formed inside (center side) in the diaper width direction from the position, or can be formed outward in the diaper width direction from the side edge 3c of the absorbent main body 3.

腹側外装体２Ａ及び背側外装体２Ｂそれぞれのウエスト伸縮部Ｇ１及び胴回り伸縮部Ｇ２においては、弾性部材２４が収縮することにより、隣接する融着部列間のシート２２及び２３が互いに離れる方向に膨らんで、隣接する融着部列間にシート２２又はシート２３からなる襞２９が生じると共に、両シート２２，２３間には、襞２９と襞２９とに周囲を囲まれた中空部３０が形成される（図６参照）。襞２９や中空部３０が形成されることにより、腹側外装体２Ａ及び背側外装体２Ｂのウエスト部Ｄ等の柔らかさが向上して肌触り等が向上する他、肌当接面側に形成される襞２９間を空気が流通し易くムレ防止性にも優れている。特に、外層シート２２及び内層シート２３を、不織布等の通気性シートで形成した場合等においては、おむつ１内の湿気を外部に一層逃がしやすくなる。
ウエスト伸縮部Ｇ１の熱融着部列は、前述した通り、シート材２０の折り返し部分２１の２層部分にも連続して形成されている。本実施形態のおむつ１における折り返し部分２１の融着部２６間には、弾性部材２４が配されていないが、折り返し部分２１の融着部間にも弾性部材を配することもできる。
また、胴回り伸縮部Ｇ２は、おむつ１の幅方向Ｙにおける、少なくとも、吸収性本体３の長手方向の両側縁それぞれより外方に位置する部分に形成されていることが好ましい。 In the waist stretchable part G1 and the waistline stretchable part G2 of each of the abdominal exterior body 2A and the back exterior body 2B, the elastic members 24 contract and the sheets 22 and 23 between the adjacent fused part rows are separated from each other. And a flange 29 formed of the sheet 22 or the sheet 23 is generated between the adjacent welded portion rows, and a hollow portion 30 surrounded by the flange 29 and the flange 29 is formed between the sheets 22 and 23. Formed (see FIG. 6). By forming the heel 29 and the hollow portion 30, the softness of the waist portion D of the abdominal exterior body 2 A and the back exterior body 2 B is improved to improve the touch and the like, and is formed on the skin contact surface side. Air is easy to circulate between the eaves 29 and has excellent anti-sagging properties. In particular, when the outer layer sheet 22 and the inner layer sheet 23 are formed of a breathable sheet such as a nonwoven fabric, moisture in the diaper 1 is more easily released to the outside.
The heat-sealed part row | line | column of the waist expansion-contraction part G1 is continuously formed also in the 2 layer part of the folding | turning part 21 of the sheet | seat material 20 as mentioned above. The elastic member 24 is not disposed between the fusion portions 26 of the folded portion 21 in the diaper 1 of the present embodiment, but an elastic member can also be disposed between the fusion portions of the folded portion 21.
Moreover, it is preferable that the waistline expansion-contraction part G2 is formed in the part located in the outer side from each of the both-sides edge of the longitudinal direction of the absorptive main body 3 in the width direction Y of the diaper 1 at least.

本実施形態のおむつ１は、図４及び図５に示すように、腹側外装体２Ａ及び背側外装体２Ｂそれぞれのウエスト部Ｄにおいて、ウエスト開口部の周縁端５１に最も近い弾性部材２４が、ウエスト開口部の周縁端５１近傍に配されているが、外装体を構成するシート材２０を折り返す際の折り目部分５２には配されていない。
従来、外装体を構成するシート材２０をウエスト開口部の周縁端５１において折り返す場合、弾性部材２４が、折り返しの折り目部分５２に位置することが多かったが、本実施形態のように、折り目部分５２に弾性部材２４を配さないことにより、柔らかい着用者の腹部等に弾性部材２４が食い込みにくくなり、装着中の違和感を軽減できるほか、先端が弾性体を有さない柔らかな感触であるため、腹囲の変動による擦れを防止することができる。また、食い込んだ場合にも、先端が柔らかな感触であるために、違和感や擦れを軽減することができる。 As shown in FIGS. 4 and 5, the diaper 1 of the present embodiment has an elastic member 24 closest to the peripheral edge 51 of the waist opening in each waist part D of the abdominal exterior body 2A and the back exterior body 2B. Although it is arranged near the peripheral edge 51 of the waist opening, it is not arranged in the fold portion 52 when the sheet material 20 constituting the exterior body is folded.
Conventionally, when the sheet material 20 constituting the exterior body is folded back at the peripheral edge 51 of the waist opening, the elastic member 24 is often located in the folded fold portion 52. However, as in the present embodiment, the fold portion Since the elastic member 24 is not disposed at 52, the elastic member 24 is less likely to bite into a soft wearer's abdomen and the like. It is possible to prevent rubbing due to fluctuations in the waist circumference. In addition, even when biting in, since the tip has a soft feel, it is possible to reduce uncomfortable feeling and rubbing.

本実施形態のように、ウエスト部Ｄに、弾性部材２４を融着部２６で固定されないように配した場合、ウエスト開口部の周縁端５１に最も近い弾性部材２４が、折り目部分５２に移動する可能性がある。そのため、本実施形態のおむつ１においては、ウエスト開口部の周縁端５１に最も近い弾性部材２４を含めて、ウエスト部Ｄに配された総ての弾性部材２４の両端部（Ｙ方向の両端部）が、サイドシール部４における、シート材２０を折り返す際の折り目部分５２から離間した位置に固定されている。これにより、折り目部分５２に弾性部材２４が存在しない状態が安定に維持される。 When the elastic member 24 is arranged on the waist portion D so as not to be fixed by the fused portion 26 as in the present embodiment, the elastic member 24 closest to the peripheral edge 51 of the waist opening moves to the fold portion 52. there is a possibility. Therefore, in the diaper 1 of the present embodiment, both end portions (both end portions in the Y direction) of all the elastic members 24 arranged in the waist portion D including the elastic member 24 closest to the peripheral edge 51 of the waist opening. ) Is fixed to the side seal portion 4 at a position separated from the crease portion 52 when the sheet material 20 is folded back. Thereby, the state in which the elastic member 24 does not exist in the crease | fold part 52 is maintained stably.

本実施形態のおむつ１は、図４及び図５に示すように、腹側外装体２Ａ及び背側外装体２Ｂそれぞれのウエスト部Ｄにおいて、外装体を構成するシート材２０を折り返す際の折り目部分５２に融着部２６同士間の領域が位置しており、該折り目部分に融着部２６が存在していない。
折り目部分５２に融着部２６が存在しないことにより、折り目部分がシート材そのものの柔らかな感触となり、着用者の違和感を低減し、折り目部分がお腹に食い込んだ際の肌との擦れによる赤みや傷を防止することができる。 As shown in FIGS. 4 and 5, the diaper 1 of the present embodiment is a fold portion when the sheet material 20 constituting the exterior body is folded back at the waist portions D of the abdominal exterior body 2A and the back exterior body 2B. An area between the fused portions 26 is located at 52, and the fused portion 26 does not exist at the fold portion.
Since the fused portion 26 does not exist in the crease portion 52, the crease portion becomes a soft feel of the sheet material itself, reducing the wearer's uncomfortable feeling, and the redness due to rubbing with the skin when the crease portion bites into the stomach. Scratches can be prevented.

また、本実施形態においては、ウエスト伸縮部Ｇ１の融着部列が、シート材２０の折り返し部分２１の２層部分にも形成されているが、図４及び図５に示すように、シート材２０の折り返されていない部分の融着部２６と、折り返し部分２１の融着部２６とが、おむつの縦方向Ｘにおいて重なっていない。そのため、シート材２０における硬い部分である融着部２６どうしが重ならないことにより、肌に対する当たりがより柔軟となる。おむつの縦方向Ｘにおいて重なっていないとは、完全に重なっていないことが好ましいが、完全には重ならないように、重なる部分と重ならない部分を有するようにずらして形成されている場合も含まれる。 Moreover, in this embodiment, although the melt | fusion part row | line | column of the waist expansion-contraction part G1 is formed also in the 2 layer part of the folding | turning part 21 of the sheet | seat material 20, as shown in FIG.4 and FIG.5, a sheet | seat material The fused portion 26 of the unfolded portion 20 and the fused portion 26 of the folded portion 21 do not overlap in the longitudinal direction X of the diaper. For this reason, the fused portions 26 that are hard portions in the sheet material 20 do not overlap each other, so that the contact with the skin becomes more flexible. It is preferable that the diaper does not overlap in the longitudinal direction X, but it is preferable that the diaper does not overlap completely. However, a case where the diaper is formed so as to have a portion that overlaps with a portion that does not overlap is included. .

本実施形態のおむつ１は、サイドシール部４のおむつ縦方向の長さを３等分して、腹側部Ａ及び背側部Ｂを、上部Ｐ１、中間部Ｐ２及び下部Ｐ３に３等分したとき、該上部Ｐ１、該中間部Ｐ２及び該下部Ｐ３は、物品縦方向Ｘの単位長さ当たりの物品幅方向Ｙの収縮応力が、下記式（１）の関係を有している。
中間部Ｐ２の収縮応力＞下部Ｐ３の収縮応力＞上部Ｐ１の収縮応力・・（１） The diaper 1 of this embodiment divides the length of the side seal part 4 in the diaper longitudinal direction into three equal parts, and divides the ventral part A and the back part B into three equal parts at the upper part P1, the intermediate part P2, and the lower part P3. In this case, the contraction stress in the article width direction Y per unit length in the article longitudinal direction X of the upper part P1, the intermediate part P2, and the lower part P3 has the relationship of the following formula (1).
Shrinkage stress of intermediate part P2> Shrinkage stress of lower part P3> Shrinkage stress of upper part P1 (1)

中間部Ｐ２の収縮応力＞下部Ｐ３の収縮応力とすることにより、おむつ全域に過度な収縮応力を持たせることなく、効果的におむつ着用時のずれ落ちを防止することができる。更に、下部Ｐ３の収縮応力＞上部Ｐ１の収縮応力とすることで、おむつのずれ落ち防止に更に効果があるほか、ウエスト開口部の応力が低いために、履かせやすさや自分で履く際の履きやすさが向上する。
しかし、収縮応力の最も強い中間部Ｐ２が直接着用者の肌に当たると、腹囲の変動や動作によっておむつが変動した際に、肌との摩擦による擦れや、擦れによる肌の赤みや傷を与えやすい。
これに対して、本実施形態のおむつ１のように、折り返し部分２１が、中間部Ｐ２の少なくとも一部の内面側を被覆していると、着用者の動きによるおむつの変動を緩和し、肌との摩擦による擦れを軽減することができる。
このような観点から、ウエスト開口部の周縁端５１から折り返し部分２１の下端までの距離Ｌ３は、サイドシール部４の長さＬ４の１５〜９５％であることが好ましく、より好ましくは２５〜７５％である。
折り返し部分２１が中間部Ｐ２の少なくとも一部を被覆する構成は、少なくとも腹側部Ａが有することが好ましく、腹側部Ａ及び背側部Ｂが有することがより好ましい。 By setting the contraction stress of the intermediate portion P2> the contraction stress of the lower portion P3, it is possible to effectively prevent the slippage during wearing of the diaper without giving excessive contraction stress to the entire diaper. Furthermore, by making the contraction stress of the lower part P3> the contraction stress of the upper part P1, it is more effective in preventing the diaper from slipping off, and the stress at the waist opening is low, so it is easy to put on and when wearing it yourself. Ease is improved.
However, when the middle part P2 having the strongest contraction stress directly hits the wearer's skin, when the diaper fluctuates due to fluctuations in the abdominal circumference or movement, it tends to cause rubbing due to friction with the skin, redness or scratching of the skin due to rubbing .
On the other hand, when the folded portion 21 covers at least a part of the inner surface side of the intermediate portion P2 as in the diaper 1 of the present embodiment, the variation of the diaper due to the movement of the wearer is alleviated, and the skin Rubbing due to friction with can be reduced.
From this point of view, the distance L3 from the peripheral edge 51 of the waist opening to the lower end of the folded portion 21 is preferably 15 to 95% of the length L4 of the side seal portion 4, and more preferably 25 to 75. %.
The configuration in which the folded portion 21 covers at least a part of the intermediate portion P2 is preferably at least the ventral portion A, and more preferably the ventral portion A and the dorsal portion B.

各部Ｐ１〜Ｐ３の収縮応力（単位長さ当たりの収縮応力）は、以下のようにして測定することができる。
おむつのサイドシール部を剥離し、図２のように伸張、展開して平面状に拡げ、腹側部材Ａ及び背側部Ｂのそれぞれについて、ＰＡ１〜ＰＡ３、ＰＢ１〜ＰＢ３の領域をそれぞれおむつ幅方向と平行な直線に沿って切断して切り出し、両部材Ａ，Ｂの両側縁部間の全長に亘る長さの各領域の短冊ないし帯状のサンプルを得る。この切り出しの際には、腹側シート部材２Ａ及び背側シート部材２Ｂのみならず、吸収性本体３や折り返し部２１等を含むおむつ全体を切断し、吸収体を取り除く。吸収体を取り除く際には、折り返し部２１の接着領域は吸収体を取り除くのに必要な範囲で剥がす。その際に剥がした部分を再度接着しなおす必要はない。吸収体を取り除いてから、腹側部Ａ及び背側部Ｂを各領域に切断しても良い。その際にも、折り返し部２１の接着領域は吸収体を取り除くのに必要な範囲で剥がす。その際に剥がした部分を再度接着しなおす必要はない。領域の境界部に弾性部材が存在する場合は、近接する弾性体以外の部分で切断する。 The contraction stress (contraction stress per unit length) of each part P1-P3 can be measured as follows.
The side seal part of the diaper is peeled off, extended and expanded as shown in FIG. 2 to expand into a flat shape, and the areas of PA1 to PA3 and PB1 to PB3 are respectively set to the diaper widths for the abdominal member A and the back part B. Cut along a straight line parallel to the direction and cut out to obtain a strip or strip-shaped sample of each region having a length over the entire length between both side edges of both members A and B. At the time of this cutting, not only the ventral sheet member 2A and the back sheet member 2B but also the entire diaper including the absorbent main body 3, the folded portion 21 and the like is cut to remove the absorbent body. When removing the absorbent body, the adhesion area of the folded portion 21 is peeled off to the extent necessary to remove the absorbent body. There is no need to re-adhere the peeled portion. After removing the absorbent body, the abdominal part A and the back part B may be cut into regions. Also in this case, the adhesion region of the folded portion 21 is peeled off within a range necessary for removing the absorber. There is no need to re-adhere the peeled portion. When an elastic member is present at the boundary of the region, cutting is performed at a portion other than the adjacent elastic body.

切り出した各領域（測定サンプル）の長手方向の両側を、テンシロン引張試験機（ＳＨＩＭＡＤＺＵ社製「オートグラフＡＧ−Ｘ」）のチャックに挟み、該測定サンプルを３００ｍｍ／ｍｉｎの速度の速度で、伸長させ、腹側部材Ａ及び背側部Ｂの内寸〔弾性部材により外包材のシートが収縮していない状態（換言すれば弾性部材を配さずに腹側部Ａ及び背側部Ｂのみを伸展させた状態）で測定した腹側部Ａ及び背側部Ｂのサイドシール部間の長さを１００（例えば３５０ｍｍ）としたときの、８０相当（例えば２８０ｍｍ）の長さまで伸長させた後に、７１相当（例えば２５０ｍｍ）の長さまで収縮させたときの単位長さ（１０ｍｍ）あたりの引張り荷重（ｃＮ）をＸ方向の単位長さ当たりのＹ方向の収縮応力とする。上部Ｐ１の収縮応力はＰＡ１とＰＢ1の領域の収縮応力の平均値とし、中間部Ｐ２の収縮応力はＰＡ２とＰＢ２の領域の収縮応力の平均値とし、下部Ｐ３の収縮応力はＰＡ３とＰＢ３の領域の収縮応力の平均値とする。腹側部Ａ及び背側部Ｂの内寸を１００としたときの７１相当の長さにおける戻りの力を規定した理由は、本実施形態のパンツ型使い捨ておむつ１を着用する主たる対象者である幼児の腹回りの長さがおむつ内寸と比して７１％程度となるからである。なお、ここで言う腹回りの長さは、幼児の姿勢が変化したときの腹回りの周長の変化を考慮し、立位および座位で測定した腹回りの平均値である。 The both sides in the longitudinal direction of each cut out region (measurement sample) are sandwiched between chucks of a Tensilon tensile tester (“Autograph AG-X” manufactured by SHIMADZU), and the measurement sample is stretched at a speed of 300 mm / min. The inner dimension of the ventral member A and the back portion B [the sheet of the outer packaging material is not contracted by the elastic member (in other words, only the ventral portion A and the dorsal portion B without the elastic member being arranged) After extending to a length corresponding to 80 (for example, 280 mm) when the length between the side seal portions of the abdominal side A and the back side B measured at 100 (for example, 350 mm) is measured, A tensile load (cN) per unit length (10 mm) when contracted to a length equivalent to 71 (for example, 250 mm) is defined as a contraction stress in the Y direction per unit length in the X direction. The contraction stress of the upper part P1 is the average value of the contraction stress in the PA1 and PB1 areas, the contraction stress of the intermediate part P2 is the average value of the contraction stress of the PA2 and PB2 areas, and the contraction stress of the lower part P3 is the PA3 and PB3 areas. The average value of the shrinkage stress. The reason which prescribed | regulated the return force in the length equivalent to 71 when the inner dimension of the abdominal part A and the back part B was set to 100 is a main subject who wears the pants type disposable diaper 1 of this embodiment. This is because the length of the infant's belly is about 71% of the inner diameter of the diaper. Note that the length of the abdomen around here is an average value of the abdomen measured in the standing position and the sitting position in consideration of the change in the circumference of the abdomen when the posture of the infant changes.

前述した一又は二以上の効果を得る観点から、中間部Ｐ２の収縮応力は、下部Ｐ３の収縮応力の１．２〜２．５倍、特に１．２〜２倍であることが好ましい。また、下部Ｐ３の収縮応力は、上部Ｐ１の収縮応力の１．２〜３．５倍、特に１．２〜３倍であることが好ましい。また、同様の観点から、中間部Ｐ２の収縮応力は、１４〜５０ｃＮ、特に２０〜５０ｃＮであることが好ましく、下部Ｐ３の収縮応力は、１４〜４０ｃＮ、特に１５〜３５ｃＮであることが好ましく、上部Ｐ１の収縮応力は、１〜３０ｃＮ、特に５〜２５ｃＮであることが好ましい。 From the viewpoint of obtaining one or more of the effects described above, the contraction stress of the intermediate portion P2 is preferably 1.2 to 2.5 times, particularly 1.2 to 2 times, the contraction stress of the lower portion P3. Moreover, it is preferable that the contraction stress of the lower part P3 is 1.2 to 3.5 times, especially 1.2 to 3 times the contraction stress of the upper part P1. Further, from the same viewpoint, the contraction stress of the intermediate part P2 is preferably 14 to 50 cN, particularly 20 to 50 cN, and the contraction stress of the lower part P3 is preferably 14 to 40 cN, particularly preferably 15 to 35 cN. The shrinkage stress of the upper part P1 is preferably 1 to 30 cN, and particularly preferably 5 to 25 cN.

おむつ１の吸収性本体３は、図２及び図４に示すように、液透過性の表面シート３１、液不透過性又は撥水性の裏面シート３２、及び両シート３１、３２間に介在配置された液保持性の吸収体３３を有しており、おむつ縦方向Ｘに長い長方形状に形成されている。吸収体３３は、パルプ繊維等の繊維の集合体（不織布であっても良い）からなる吸収性コア又はこれに吸水性ポリマーの粒子を保持させてなる吸収性コアと、該吸収性コアを被覆するコアラップシート（図示せず）からなる。 As shown in FIGS. 2 and 4, the absorbent main body 3 of the diaper 1 is interposed between a liquid-permeable top sheet 31, a liquid-impermeable or water-repellent back sheet 32, and both sheets 31 and 32. The liquid-retaining absorbent 33 is formed in a rectangular shape that is long in the longitudinal direction X of the diaper. The absorbent body 33 is composed of an absorbent core made of an aggregate of fibers such as pulp fibers (may be a non-woven fabric) or an absorbent core in which water-absorbing polymer particles are held, and the absorbent core covered. A core wrap sheet (not shown).

吸収性本体３の長手方向の両側部には、液抵抗性ないし撥水性で且つ通気性の素材から構成された側方カフス３４，３４が形成されている。各側方カフス３４の自由端の近傍には、側方カフス弾性部材３５が伸長状態で配されている。おむつ１の着用中には、側方カフス弾性部材３５が収縮することにより側方カフス３４が起立し、吸収性本体３から幅方向外方への液の流出が阻止される。吸収性本体３は、長手方向の一端側（腹側外装体２Ａと重なっている部分）が、腹側外装体２Ａの外面に接着剤（不図示）を介して固定され、長手方向の他端側が、背側外装体２Ｂの外面に接着剤（不図示）を介して固定されている。 Side cuffs 34 and 34 made of a liquid-resistant or water-repellent and breathable material are formed on both sides in the longitudinal direction of the absorbent main body 3. In the vicinity of the free end of each side cuff 34, a side cuff elastic member 35 is arranged in an extended state. During wearing of the diaper 1, the side cuff 34 is raised by contraction of the side cuff elastic member 35, and the outflow of liquid from the absorbent main body 3 to the outside in the width direction is prevented. As for the absorptive main body 3, the one end side (the part which overlaps with the ventral | abdominal exterior body 2A) of a longitudinal direction is fixed to the outer surface of the abdominal exterior body 2A via an adhesive agent (not shown), and the other end of a longitudinal direction The side is fixed to the outer surface of the backside exterior body 2B via an adhesive (not shown).

おむつ１の各部の形成材料について説明すると、表面シート３１、裏面シート３２、及び吸収体３３の吸収性コアやコアラップシートとしては、それぞれ、この種の吸収性物品に従来用いられているものと同様のものを用いることができる。吸収性本体３の外側には、裏面シート３２に重ねて、不織布やフィルム等の外装シートを配することもできる。 The forming material of each part of the diaper 1 will be described. As the absorbent core and core wrap sheet of the top sheet 31, the back sheet 32, and the absorbent body 33, respectively, those conventionally used for this type of absorbent article Similar ones can be used. On the outer side of the absorbent main body 3, an exterior sheet such as a non-woven fabric or a film can be disposed on the back sheet 32.

外層シート２２及び内層シート２３としては、この種の物品に従来使用されている各種のシート材を特に制限なく用いることができるが、不織布であることが好ましく、特に柔軟性等の観点から、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からなる単層の不織布又は２層以上の積層不織布であることが好ましい。また、これらの不織布とフィルムとを一体化したシートでもよい。
弾性部材２４，３５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る。弾性材料の形成素材のとしては、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、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る。弾性部材の形態としては、断面が矩形、正方形、円形、多角形状等の糸状（糸ゴム等）若しくは紐状（平ゴム等）のもの、又はマルチフィラメントタイプの糸状のもの等を好ましく用いることができる。 As the outer layer sheet 22 and the inner layer sheet 23, various sheet materials conventionally used for this type of article can be used without particular limitation, but is preferably a non-woven fabric, particularly from the viewpoint of flexibility and the like. It is preferably a single-layer nonwoven fabric or a laminated nonwoven fabric of two or more layers composed of a through nonwoven fabric, a heat roll nonwoven fabric, a spunlace nonwoven fabric, a spunbond nonwoven fabric, a melt blown nonwoven fabric, or the like. Moreover, the sheet | seat which integrated these nonwoven fabrics and films may be sufficient.
As a material for forming the elastic members 24 and 35, 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 for forming the elastic material include synthetic rubbers such as styrene-butadiene, butadiene, isoprene, and neoprene, natural rubber, EVA, stretchable polyolefin, and polyurethane. As the form of the elastic member, it is preferable to use a thread-like (thread rubber etc.) or string-like (flat rubber etc.) cross-section having a rectangular, square, round, polygonal cross section, or a multifilament type thread-like one. it can.

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ず適宜変更可能である。
例えば、腹側外装体２Ａと背側外装体２Ｂを構成するシート材２０は、それぞれ、弾性部材２４と重ならないように形成されたドット状の融着部２６を有するものに代えて、おむつ外面をなす外層シート２２とその内側に配された内層シート２３とが全域において接着された構造を有するものであっても良い。 As mentioned above, although this invention was demonstrated based on the preferable embodiment, this invention is not restrict | limited to embodiment mentioned above, It can change suitably.
For example, the sheet material 20 constituting the abdominal exterior body 2 A and the back exterior body 2 B is replaced with an outer surface of a diaper instead of one having a dot-like fusion part 26 formed so as not to overlap the elastic member 24. The outer layer sheet 22 forming the inner layer 23 and the inner layer sheet 23 disposed inside the outer layer sheet 22 may have a structure bonded in the entire region.

また、胴回り伸縮部Ｇ２を、腹側外装体２Ａ及び／又は背側外装体２Ｂの全幅に亘るように形成しても良い。また、腹側外装体２Ａ及び／又は背側外装体２Ｂに、サイドシール部４の下端より下方に延出する延出部を設けても良い。 Moreover, you may form the waist part expansion-contraction part G2 so that the full width of 2 A of ventral | abdominal exterior bodies and / or the back | dorsal exterior body 2B may be covered. Moreover, you may provide the extension part extended below from the lower end of the side seal | sticker part 4 in 2 A of back side exterior bodies, and / or the back side exterior body 2B.

また、外装体は、腹側外装体２Ａと背側外装体２Ｂとに分割されていないもの、即ち腹側部Ａ、股下部Ｃ及び背側部Ｂに亘って連続するものであっても良い。
また、本発明のパンツ型吸収性物品は、図７に示すパンツ型おむつのように、外装体を構成するシート材の折り返し部分２１が、吸収性本体３の周縁に沿う所定幅の領域（周縁固定部分）２１ｂ及びサイドシール部近傍２１ｃのみにおいて、相対向面に接合されているものであっても良い。また、シート材の折り返し部分２１の周縁固定部分２１ｂは、吸収性本体３の長手方向の端部においては、吸収性本体３の周縁の内外に亘っている一方、吸収性本体３の幅方向においては、吸収性本体３の周縁より外方のみに位置するもの等であっても良い。 In addition, the exterior body may be one that is not divided into the abdominal side exterior body 2A and the back side exterior body 2B, that is, continuous across the abdominal side part A, the crotch part C, and the back side part B. .
Moreover, the underpants type absorbent article of the present invention is a region having a predetermined width along the periphery of the absorbent main body 3 (periphery), such as the underpants type diaper shown in FIG. Only the fixing portion 21b and the side seal portion vicinity 21c may be joined to the opposing surfaces. Further, the peripheral edge fixing portion 21b of the folded portion 21 of the sheet material extends inside and outside the peripheral edge of the absorbent main body 3 at the longitudinal end portion of the absorbent main body 3, while in the width direction of the absorbent main body 3. May be located only outward from the periphery of the absorbent main body 3.

また、本発明のパンツ型吸収性物品における周縁固定部分は、図８に示す周縁固定部分２１ｂのように、吸収性本体３の長手方向の端部のみにおいて、吸収性本体３の周縁を固定するものであっても良い。また、周縁固定部分は、吸収性本体３の長手方向の端縁を固定する部分と吸収性本体３の側縁を固定する部分とが離間していても良い。
図８に示す周縁固定部分２１ｂは、おむつの幅方向Ｙの長さ（相対向面が接合されている部分の長さ）が、吸収性本体３の幅（側縁３ｃ，３ｃ間の距離）と同じである。図７及び図８にも、シート材の折り返し部分２１が、その相対向面に接合されている部分を斜線部で示してある。 Moreover, the periphery fixing | fixed part in the underpants type absorbent article of this invention fixes the periphery of the absorptive main body 3 only in the edge part of the longitudinal direction of the absorptive main body 3 like the peripheral fixing | fixed part 21b shown in FIG. It may be a thing. Further, in the peripheral fixing portion, the portion for fixing the longitudinal edge of the absorbent main body 3 and the portion for fixing the side edge of the absorbent main body 3 may be separated from each other.
The peripheral fixed portion 21b shown in FIG. 8 has a length in the width direction Y of the diaper (the length of the portion where the opposing surfaces are joined) is the width of the absorbent main body 3 (distance between the side edges 3c and 3c). Is the same. Also in FIGS. 7 and 8, a portion where the folded portion 21 of the sheet material is joined to the facing surface is indicated by a hatched portion.

また、上述した実施形態のおむつの腹側部Ａ又は背側部Ｂを、シート材２０の折り返し部分を有しないものや、折り返し部分を有するが、その折り返し部分が、上述したおむつ１とは異なる態様で相対向面に接合されているもの、例えば、全域に亘って相対向面に接合されているもの等とすることもできる。また、上述した実施形態における腹側外装体に関して説明した好ましい構成は、背側外装体にも同様に適用することができる。 Moreover, although the belly side part A or back side part B of the diaper of embodiment mentioned above does not have the folding | turning part of the sheet | seat material 20, or has a folding | turning part, the folding | turning part is different from the diaper 1 mentioned above. It can also be set as what is joined to the opposing surface in the aspect, for example, what is joined to the opposing surface over the entire region. Moreover, the preferable structure demonstrated regarding the ventral | exterior exterior body in embodiment mentioned above is applicable similarly to a back | dorsal exterior body.

また、パンツ型吸収性物品は、幼児又は成人用のパンツ型使い捨ておむつの他、パンツ型の生理用ナプキン等であっても良い。
上述した一の実施形態における説明省略部分及び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。 The pants-type absorbent article may be a pants-type sanitary napkin or the like in addition to a pants-type disposable diaper for infants or adults.
The description omitted in one embodiment described above and the requirements of only one embodiment can be applied to other embodiments as appropriate, and the requirements in each embodiment can be appropriately changed between the embodiments. Can be substituted.

１パンツ型使い捨ておむつ（パンツ型吸収性物品）
２Ａ腹側外装体（外装体）
２Ｂ背側外装体（外装体）
２０外装体を構成するシート材
２１シート材の折り返し部分
２２外層シート
２３内層シート
２４弾性部材
Ｐ１上部
Ｐ２中間部
Ｐ３下部
３吸収性本体
３１表面シート
３２裏面シート
３３吸収体
３４側方カフス
４サイドシール部
５ウエスト開口部
５１周縁端
５２折り目部分
６レッグ開口部
Ａ腹側部
Ｂ背側部
Ｃ股下部
Ｇ１ウエスト伸縮部
Ｇ２胴回り伸縮部 1 Pants-type disposable diapers (pants-type absorbent articles)
2A Ventral exterior body (exterior body)
2B Backside exterior body (exterior body)
DESCRIPTION OF SYMBOLS 20 Sheet material which comprises an exterior body 21 Folded part of sheet material 22 Outer layer sheet 23 Inner layer sheet 24 Elastic member P1 Upper part P2 Middle part P3 Lower part 3 Absorbent main body 31 Top sheet 32 Back sheet 33 Absorber 34 Side cuff 4 Side seal Part 5 waist opening 51 peripheral edge 52 crease part 6 leg opening A ventral part B dorsal part C crotch G1 waist elastic part G2 waist elastic part

Claims

An absorbent main body including an absorbent body and an exterior body positioned on the outer surface side of the absorbent main body, both sides of the exterior body on the abdominal side and both sides of the exterior body on the back side are joined A pair of side seal portions, a waist opening portion and a pair of leg opening portions are pant-type absorbent articles,
At least the sheet material constituting the outer body of the abdomen is folded back toward the inner surface of the article along the peripheral edge of the waist opening, and a part of the folded portion covers the inner surface of the end of the absorbent main body. And
The folded portion of the sheet material is a portion other than the vicinity of the side seal portion, the periphery fixing portion, and the inner surface covering portion of the absorbent main body, while the peripheral fixing portion of the absorbent main body is joined to the opposing surface. Is not bonded to the opposite surface,
The peripheral edge fixing portion overlaps with the peripheral edge of the absorbent main body including the longitudinal end edge of the absorbent main body and the left and right side edges of the absorbent main body, and has a predetermined width extending inward and outward of the peripheral edge at each part of the peripheral edge. A portion that overlaps the inner surface of the absorbent main body inward from the periphery of the absorbent main body and a portion that extends outward from the peripheral edge of the absorbent main body with an adhesive on each opposing surface. Are joined via
The folded portion of the sheet material is bonded to the opposite surface in the entire area of the inner peripheral covering portion that overlaps the portion extending outward from the peripheral edge of the absorbent main body and the inner surface of the absorbent main body in the peripheral edge fixing portion. Has been
The folded portion of the sheet material is a pant in which an edge on the leg opening portion side between the peripheral edge fixed portion and the joint portion in the vicinity of the side seal portion is not joined to the facing surface of the folded portion. Mold absorbent article.

The sheet material that constitutes the exterior body includes two sheets that are joined to each other at a large number of fused portions formed in the form of dots, and a plurality of elastic members that are arranged so as not to pass through the fused portions. The underpants type absorbent article of Claim 1 provided with the member.

The two sheets are an outer layer sheet forming the outer surface of the pant-type absorbent article and an inner layer sheet positioned on the inner surface side adjacent to the outer layer sheet, the outer layer sheet and the inner layer sheet, It has a folded portion that is folded back to the inner surface of the article along the peripheral edge of the waist opening,
The folded portion of the outer layer sheet has an extended portion that extends to the crotch side rather than an end edge on the crotch portion side of the folded portion of the inner layer sheet, and the peripheral edge fixing portion is formed in the extended portion The underpants type absorbent article according to claim 2, wherein

The pants-type absorbent article according to claim 2, wherein the elastic member is disposed in the vicinity of a peripheral edge of the waist opening, but is not disposed in a fold portion when the sheet material is folded back.

The pants-type absorbent article according to claim 4, wherein both end portions of the elastic member are fixed at positions separated from a fold portion in the side seal portion when the sheet material is folded back.

The pants-type absorbent article according to any one of claims 2, 4, and 5, wherein the fused portion does not exist in a fold portion when the sheet material is folded.

When the length of the side seal part in the diaper longitudinal direction is divided into three equal parts, and the ventral part A and the dorsal part B are divided into the upper part, the middle part and the lower part, the upper part, the middle part and the In the lower part, the contraction stress in the article width direction per unit length in the article longitudinal direction has the relationship of the following formula (1):
Middle part shrinkage stress> Lower part shrinkage stress> Upper part shrinkage stress (1)
The underpants type absorbent article according to any one of claims 1 to 6, wherein a folded portion of the sheet material on the stomach side portion covers a part of the intermediate portion.