JP7372769B2

JP7372769B2 - absorbent articles

Info

Publication number: JP7372769B2
Application number: JP2019122774A
Authority: JP
Inventors: 淳生福元
Original assignee: Livedo Corp
Current assignee: Livedo Corp
Priority date: 2019-07-01
Filing date: 2019-07-01
Publication date: 2023-11-01
Anticipated expiration: 2039-07-01
Also published as: JP2021007617A

Description

本発明は、吸収性物品に関する。 The present invention relates to absorbent articles.

従来、両側部上に一対の側壁部を設けた吸収性物品が実用化されている。例えば、特許文献１では、側壁部（防漏壁）が、表面層から起立する側壁基部（基壁部）と、側壁基部の先端部近傍から幅方向外方に延出する第１延出部および第２延出部とを有する。第１延出部および第２延出部のそれぞれには、複数の弾性部材が吸収性物品の長手方向に沿うように配設される。また、第１延出部よりも下方側に配置される第２延出部の剛性が、第１延出部の剛性よりも大きくされ、第２延出部が着用者の鼠径部近傍に当接する。 BACKGROUND ART Conventionally, absorbent articles having a pair of side wall portions on both sides have been put into practical use. For example, in Patent Document 1, the side wall portion (leakage prevention wall) includes a side wall base portion (base wall portion) that stands up from the surface layer, and a first extending portion that extends outward in the width direction from near the tip of the side wall base. and a second extending portion. A plurality of elastic members are arranged in each of the first extension part and the second extension part so as to extend along the longitudinal direction of the absorbent article. Further, the rigidity of the second extending part disposed below the first extending part is made greater than the rigidity of the first extending part, and the second extending part touches the vicinity of the wearer's groin region. come into contact with

なお、特許文献２では、第１カフおよび第２カフを有する二重カフが開示されている。第１カフおよび第２カフは、おむつとの結合位置を基端部としてそれぞれ立ち上がる。 Note that Patent Document 2 discloses a double cuff having a first cuff and a second cuff. The first cuff and the second cuff each stand up with their proximal ends at the position where they are connected to the diaper.

特開２００９－１７８２７４号公報Japanese Patent Application Publication No. 2009-178274 特表２００７－５３１５８７号公報Special Publication No. 2007-531587

ところで、特許文献１の構造では、尿等の排泄物の量によっては、排泄物の横漏れを十分に抑制することができない可能性がある。したがって、横漏れをより確実に抑制することが可能な新規な構造が求められている。 By the way, with the structure of Patent Document 1, depending on the amount of excrement such as urine, there is a possibility that side leakage of excrement cannot be sufficiently suppressed. Therefore, there is a need for a new structure that can more reliably suppress side leakage.

本発明は上記課題に鑑みなされたものであり、吸収性物品において横漏れをより確実に抑制することを目的としている。 The present invention has been made in view of the above problems, and an object of the present invention is to more reliably suppress side leakage in an absorbent article.

請求項１に記載の発明は、吸収性物品であって、バックシートとトップシートとの間に吸収コアが配置された、長手方向に延びるシート状の本体部と、前記吸収コアの両側部近傍において前記トップシート側に設けられ、前記長手方向に延びる一対の側壁部とを備え、各側壁部が、前記長手方向に延びるとともに、前記長手方向における中央部において前記本体部と接合された基端部および前記本体部と非接合の先端部を有する側壁基部と、前記中央部において前記側壁基部の前記先端部から分岐して延びる第１延出部および第２延出部と、前記第１延出部および前記第２延出部に対して前記長手方向に沿って接合されるとともに前記長手方向に収縮することにより、前記中央部において前記側壁基部を起立させる第１延出部弾性部材および第２延出部弾性部材とを備え、前記側壁基部が起立した状態の前記中央部において、前記第１延出部が前記第２延出部に対して前記長手方向に垂直な幅方向の内側に配置され、前記第１延出部弾性部材の収縮力が、前記第２延出部弾性部材の収縮力よりも小さく、前記第１延出部および前記第２延出部が、前記中央部から前記長手方向における前記各側壁部の両端部まで延びており、前記各側壁部の前記両端部において、前記側壁基部を前記幅方向の内側に倒し、前記第１延出部を前記側壁基部または前記第２延出部と前記本体部との間に配置した状態で、前記側壁基部、前記第１延出部および前記第２延出部が前記本体部に重ねられる。 The invention according to claim 1 is an absorbent article, comprising: a sheet-like main body portion extending in the longitudinal direction in which an absorbent core is disposed between a back sheet and a top sheet; and a portion near both sides of the absorbent core. a pair of side wall portions provided on the top sheet side and extending in the longitudinal direction, each side wall portion extending in the longitudinal direction and a base end joined to the main body portion at a central portion in the longitudinal direction; a first extending portion and a second extending portion branching from the distal end portion of the side wall base in the center portion and extending from the distal end portion of the side wall base; A first extending part elastic member and a first extending part elastic member that are joined to the projecting part and the second extending part along the longitudinal direction and contract in the longitudinal direction to make the side wall base erect in the central part. and a second extension part elastic member, in the center part in which the side wall base is upright, the first extension part is located inside the second extension part in the width direction perpendicular to the longitudinal direction. the first extending part elastic member has a contractile force smaller than the second extending part elastic member, and the first extending part and the second extending part are arranged in the central part. It extends from The side wall base, the first extending portion, and the second extending portion are stacked on the main body while being disposed between the second extending portion and the main body.

請求項２に記載の発明は、請求項１に記載の吸収性物品であって、前記第２延出部弾性部材が、前記第２延出部の先端に設けられる第２糸状弾性要素を有し、前記第１延出部弾性部材が、前記第１延出部の先端に設けられるとともに前記第２糸状弾性要素よりも収縮力が小さい第１糸状弾性要素を有する。 The invention according to claim 2 is the absorbent article according to claim 1, wherein the second extending portion elastic member includes a second filamentous elastic element provided at a tip of the second extending portion. However, the first extending portion elastic member includes a first filamentous elastic element that is provided at the tip of the first extending portion and has a smaller contractile force than the second filamentous elastic element.

請求項３に記載の発明は、請求項１または２に記載の吸収性物品であって、前記側壁基部が起立した状態の前記中央部において、前記第１延出部が、前記側壁基部の前記先端部から前記幅方向の内側に向かって延びる。 The invention according to claim 3 is the absorbent article according to claim 1 or 2, in which, in the central portion in which the side wall base is in an upright state, the first extending portion extends from the side wall base. It extends inward in the width direction from the tip.

請求項４に記載の発明は、吸収性物品であって、バックシートとトップシートとの間に吸収コアが配置された、長手方向に延びるシート状の本体部と、前記吸収コアの両側部近傍において前記トップシート側に設けられ、前記長手方向に延びる一対の側壁部とを備え、各側壁部が、前記長手方向に延びるとともに、前記長手方向における中央部において前記本体部と接合された基端部および前記本体部と非接合の先端部を有する側壁基部と、前記中央部において前記側壁基部の前記先端部から分岐して延びる第１延出部および第２延出部と、前記第１延出部および前記第２延出部に対して前記長手方向に沿って接合されるとともに前記長手方向に収縮することにより、前記中央部において前記側壁基部を起立させる第１延出部弾性部材および第２延出部弾性部材とを備え、前記側壁基部が起立した状態の前記中央部において、前記第１延出部が前記第２延出部に対して前記長手方向に垂直な幅方向の内側に配置され、前記第１延出部が、前記側壁基部の前記先端部から前記幅方向の内側に向かって延びており、前記第１延出部および前記第２延出部が、前記中央部から前記長手方向における前記各側壁部の両端部まで延びており、前記各側壁部の前記両端部において、前記側壁基部を前記幅方向の内側に倒し、前記第１延出部を前記側壁基部または前記第２延出部と前記本体部との間に配置した状態で、前記側壁基部、前記第１延出部および前記第２延出部が前記本体部に重ねられる。 The invention according to claim 4 is an absorbent article, which comprises: a sheet-like main body portion extending in the longitudinal direction in which an absorbent core is disposed between a back sheet and a top sheet; and near both sides of the absorbent core. a pair of side wall portions provided on the top sheet side and extending in the longitudinal direction, each side wall portion extending in the longitudinal direction and a base end joined to the main body portion at a central portion in the longitudinal direction; a first extending portion and a second extending portion branching from the distal end portion of the side wall base in the center portion and extending from the distal end portion of the side wall base; A first extending part elastic member and a first extending part elastic member that are joined to the projecting part and the second extending part along the longitudinal direction and contract in the longitudinal direction to make the side wall base erect in the central part. and a second extension part elastic member, in the center part in which the side wall base is upright, the first extension part is located inside the second extension part in the width direction perpendicular to the longitudinal direction. The first extending portion extends inward in the width direction from the distal end portion of the side wall base , and the first extending portion and the second extending portion extend from the center portion. It extends to both ends of each of the side walls in the longitudinal direction, and at both ends of each of the side walls, the side wall base is tilted inward in the width direction, and the first extending part is connected to the side wall base or the side wall. The side wall base, the first extension, and the second extension overlap the main body while being arranged between the second extension and the main body.

請求項５に記載の発明は、請求項１ないし４のいずれか１つに記載の吸収性物品であって、前記側壁基部が起立した状態の前記中央部において、前記第２延出部の先端が、前記側壁基部の前記先端部よりも前記幅方向の内側に位置する。 The invention according to claim 5 is the absorbent article according to any one of claims 1 to 4, in which the tip of the second extending portion is located in the central portion in a state where the side wall base is upright. is located on the inner side in the width direction than the tip end of the side wall base.

請求項６に記載の発明は、請求項１ないし５のいずれか１つに記載の吸収性物品であって、前記側壁基部の前記先端部から前記第１延出部の先端までの長さが、前記側壁基部の前記先端部から前記第２延出部の先端までの長さよりも大きい。 The invention according to claim 6 is the absorbent article according to any one of claims 1 to 5, wherein the length from the tip of the side wall base to the tip of the first extending portion is , is larger than the length from the tip of the side wall base to the tip of the second extension.

請求項７に記載の発明は、請求項１ないし６のいずれか１つに記載の吸収性物品であって、前記第１延出部の剛性が、前記第２延出部の剛性よりも大きい。 The invention according to claim 7 is the absorbent article according to any one of claims 1 to 6, wherein the first extending portion has a rigidity greater than the second extending portion. .

請求項８に記載の発明は、請求項１ないし７のいずれか１つに記載の吸収性物品であって、前記各側壁部の前記両端部において、前記側壁基部の前記先端部から前記第１延出部が前記幅方向の外側に広がり、前記第２延出部が前記幅方向の内側に広がった状態である。 The invention according to claim 8 is the absorbent article according to any one of claims 1 to 7, in which , in the both ends of each of the side wall parts, from the tip of the side wall base to the first In this state, the first extending portion extends outward in the width direction, and the second extending portion extends inward in the width direction.

本発明によれば、吸収性物品において横漏れをより確実に抑制することができる。 According to the present invention, side leakage can be more reliably suppressed in an absorbent article.

吸収性物品を示す平面図である。It is a top view showing an absorbent article. 吸収性物品の股下部における断面図である。FIG. 3 is a cross-sectional view of the crotch region of the absorbent article. 吸収性物品の前方部における断面図である。FIG. 3 is a sectional view of the front part of the absorbent article. 吸収性物品を示す斜視図である。It is a perspective view showing an absorbent article. 吸収性物品の他の例の前方部における断面図である。It is a sectional view of the front part of another example of an absorbent article. 吸収性物品の他の例の股下部における断面図である。FIG. 7 is a cross-sectional view of the crotch area of another example of the absorbent article. 吸収性物品の他の例の前方部における断面図である。It is a sectional view of the front part of another example of an absorbent article. 吸収性物品の他の例の前方部における断面図である。It is a sectional view of the front part of another example of an absorbent article. 吸収性物品の他の例の股下部における断面図である。FIG. 7 is a cross-sectional view of the crotch area of another example of the absorbent article. 吸収性物品の他の例の前方部における断面図である。It is a sectional view of the front part of another example of an absorbent article.

図１は、本発明の一の実施の形態に係る使い捨て吸収性物品１を広げた状態にて示す平面図である。図２は、使い捨て吸収性物品１を図１中のII－IIの位置で長手方向（すなわち、図１中における上下方向）に垂直な面で切断した断面図であり、図３は、使い捨て吸収性物品１を図１中のIII－IIIの位置で長手方向に垂直な面で切断した断面図である。図２および図３は、後述の股下部２０２および前方部２０１における断面をそれぞれ示す。図２および図３では、図示の都合上、使い捨て吸収性物品１の各構成を積層方向（厚さ方向）に離して描いている（使い捨て吸収性物品１の断面を示す他の図において同様）。 FIG. 1 is a plan view showing a disposable absorbent article 1 according to one embodiment of the present invention in an expanded state. 2 is a cross-sectional view of the disposable absorbent article 1 taken along a plane perpendicular to the longitudinal direction (that is, the vertical direction in FIG. 1) at the position II-II in FIG. 1, and FIG. 2 is a cross-sectional view of the sexual article 1 taken along a plane perpendicular to the longitudinal direction at the position III-III in FIG. 1. FIG. 2 and 3 respectively show cross sections at a crotch portion 202 and a front portion 201, which will be described later. In FIGS. 2 and 3, for convenience of illustration, each component of the disposable absorbent article 1 is drawn separated in the stacking direction (thickness direction) (the same applies to other figures showing cross sections of the disposable absorbent article 1). .

以下の説明では、使い捨て吸収性物品１を、単に「吸収性物品１」と呼ぶ。吸収性物品１は、着用者の腹側に接触する部位と背側に接触する部位とを、左右両側の接続部１１により腰周りで止着して着用するテープタイプの使い捨ておむつである。吸収性物品１は、着用者からの排泄物を受ける。図１では、着用時に着用者に接触する側（すなわち、着用者側）の面を手前にして吸収性物品１を描いている。 In the following description, the disposable absorbent article 1 will be simply referred to as the "absorbent article 1." The absorbent article 1 is a tape-type disposable diaper that is worn by fixing the portion that contacts the wearer's ventral side and the portion that contacts the back side around the waist by connecting portions 11 on both left and right sides. The absorbent article 1 receives excrement from the wearer. In FIG. 1, the absorbent article 1 is depicted with the side that contacts the wearer when worn (ie, the wearer side) facing toward you.

吸収性物品１は、長手方向に延びる略シート状の本体部２と、一対のサイドシート３とを備える。一対のサイドシート３は、本体部２の両側部（すなわち、長手方向に垂直な幅方向の両側の端部）上において本体部２の長手方向に延びる。図１に示す例では、一対のサイドシート３は、本体部２の長手方向のおよそ全長に亘って配置される。 The absorbent article 1 includes a substantially sheet-shaped main body portion 2 extending in the longitudinal direction and a pair of side sheets 3. The pair of side sheets 3 extend in the longitudinal direction of the main body 2 on both sides of the main body 2 (that is, on both ends in the width direction perpendicular to the longitudinal direction). In the example shown in FIG. 1, the pair of side sheets 3 are arranged over approximately the entire length of the main body 2 in the longitudinal direction.

吸収性物品１では、図１中における上側の部位２０１および下側の部位２０３がそれぞれ、着用者の腹側および背側の肌に接触する。以下の説明では、当該部位２０１，２０３をそれぞれ、「前方部２０１」および「後方部２０３」と呼ぶ。また、前方部２０１と後方部２０３との間において前方部２０１および後方部２０３から連続する部位２０２を「股下部２０２」と呼ぶ。股下部２０２は、着用者の股間部に対向する。吸収性物品１は、前方部２０１、股下部２０２および後方部２０３を長手方向に順に有する。図１に示す例では、前方部２０１および後方部２０３の幅方向の幅（以下、単に「幅」ともいう。）は、股下部２０２の幅よりも大きい。換言すれば、吸収性物品１は、平面視において、いわゆる砂時計型である。 In the absorbent article 1, an upper region 201 and a lower region 203 in FIG. 1 come into contact with the wearer's ventral and dorsal skin, respectively. In the following description, the regions 201 and 203 will be referred to as "front part 201" and "rear part 203", respectively. Further, a portion 202 that is continuous from the front portion 201 and the rear portion 203 between the front portion 201 and the rear portion 203 is referred to as the “crotch portion 202”. The crotch area 202 faces the wearer's crotch area. The absorbent article 1 has a front section 201, a crotch section 202, and a rear section 203 in this order in the longitudinal direction. In the example shown in FIG. 1, the width in the width direction of the front part 201 and the rear part 203 (hereinafter also simply referred to as "width") is larger than the width of the crotch part 202. In other words, the absorbent article 1 has a so-called hourglass shape in plan view.

吸収性物品１は、後方部２０３の両側部に設けられた一対の接続部１１をさらに備える。吸収性物品１を着用者に装着する際には、前方部２０１および後方部２０３をそれぞれ着用者の腹側および背側に接触させた状態で、図４に示すように、一対の接続部１１が、前方部２０１の外面（すなわち、着用者に接触する面とは反対側の面）の被止着部２６に止着される。これにより、後方部２０３の両側部が前方部２０１の両側部に接続される。 The absorbent article 1 further includes a pair of connecting parts 11 provided on both sides of the rear part 203. When the absorbent article 1 is worn on a wearer, the pair of connecting portions 11 are attached as shown in FIG. is fixed to the attached portion 26 on the outer surface of the front portion 201 (that is, the surface opposite to the surface that contacts the wearer). Thereby, both sides of the rear part 203 are connected to both sides of the front part 201.

被止着部２６は、後述するバックシート２３の外面（すなわち、着用者とは反対側の面）上にホットメルト接着剤等により接合される面ファスナのループ部材である。被止着部２６は、微細ループ構造を有する。微細ループ構造とは、多数の微細なループ要素の集合を意味する。一対の接続部１１の内面には、例えば、被止着部２６に対して止着可能な面ファスナのフック部材が設けられる。接続部１１の内面とは、吸収性物品１を着用者に装着した状態で、前方部２０１の外面に対向する面である。当該フック部材は、微細フック構造を有する。微細フック構造とは、多数の微細なフック要素の集合を意味する。 The attached portion 26 is a loop member of a hook-and-loop fastener that is bonded to the outer surface (that is, the surface opposite to the wearer) of the backsheet 23 (described later) using a hot melt adhesive or the like. The attached portion 26 has a fine loop structure. The fine loop structure means a collection of many fine loop elements. On the inner surfaces of the pair of connecting parts 11, for example, a hook member of a hook-and-loop fastener that can be fixedly attached to the attached part 26 is provided. The inner surface of the connecting portion 11 is a surface that faces the outer surface of the front portion 201 when the absorbent article 1 is attached to the wearer. The hook member has a fine hook structure. A fine hook structure means an aggregation of a large number of fine hook elements.

図１ないし図３に示すように、本体部２は、トップシート２１と、吸収コア２２と、バックシート２３とを備える。トップシート２１は、透液性のシート部材である。バックシート２３は、撥液性または不透液性のシート部材である。吸収コア２２は、長手方向に延びる略シート状であり、トップシート２１とバックシート２３との間に配置される。吸収コア２２の着用者側の主面がトップシート２１により覆われる。吸収コア２２の他方の主面、すなわち、着用者とは反対側の主面がバックシート２３により覆われる。 As shown in FIGS. 1 to 3, the main body portion 2 includes a top sheet 21, an absorbent core 22, and a back sheet 23. The top sheet 21 is a liquid-permeable sheet member. The back sheet 23 is a liquid-repellent or liquid-impermeable sheet member. The absorbent core 22 has a substantially sheet shape extending in the longitudinal direction, and is disposed between the top sheet 21 and the back sheet 23. The main surface of the absorbent core 22 on the wearer side is covered by the top sheet 21. The other main surface of the absorbent core 22, that is, the main surface on the side opposite to the wearer, is covered with a backsheet 23.

図１では、図の理解を容易にするために、吸収コア２２の輪郭を太い破線にて描いている。図１に示す例では、前方部２０１および後方部２０３における吸収コア２２の幅は、股下部２０２における吸収コア２２の幅よりも大きい。換言すれば、吸収コア２２は、平面視において、いわゆる砂時計型である。もちろん、吸収コア２２の形状は任意に変更されてよい。 In FIG. 1, the outline of the absorbent core 22 is drawn with thick broken lines to facilitate understanding of the figure. In the example shown in FIG. 1, the width of the absorbent core 22 at the front part 201 and the rear part 203 is larger than the width of the absorbent core 22 at the crotch part 202. In other words, the absorbent core 22 has a so-called hourglass shape in plan view. Of course, the shape of the absorbent core 22 may be changed arbitrarily.

トップシート２１は、吸収コア２２の周りにおいてバックシート２３に固定される。トップシート２１とバックシート２３との固定は、例えば、ホットメルト接着剤を介して行われる。トップシート２１とバックシート２３との固定は、熱融着接合や超音波接合等により行われてもよい。図２に示す例では、トップシート２１の幅は、バックシート２３の幅よりも小さく、バックシート２３の両側部は、トップシート２１の両側縁から幅方向外側に延出している。 The top sheet 21 is fixed to the back sheet 23 around the absorbent core 22. The top sheet 21 and the back sheet 23 are fixed using, for example, a hot melt adhesive. The top sheet 21 and the back sheet 23 may be fixed by heat fusion bonding, ultrasonic bonding, or the like. In the example shown in FIG. 2, the width of the top sheet 21 is smaller than the width of the back sheet 23, and both sides of the back sheet 23 extend outward in the width direction from both side edges of the top sheet 21.

トップシート２１は、着用者からの排泄物の水分を速やかに捕捉し、当該水分を吸収コア２２へと移動させる。吸収コア２２は、トップシート２１を透過した水分（すなわち、着用者からの排泄物の水分）を吸収して固定する。バックシート２３は、バックシート２３に到達した排泄物の水分等が、本体部２の外部にしみ出すことを防止する。 Topsheet 21 quickly captures moisture from the wearer's excrement and transfers the moisture to absorbent core 22 . The absorbent core 22 absorbs and fixes moisture that has passed through the top sheet 21 (that is, moisture from the wearer's excrement). The back sheet 23 prevents water, etc. of excrement that has reached the back sheet 23 from seeping out to the outside of the main body portion 2.

図１に示すように、本体部２の長手方向の両端部では、幅方向に延びる弾性部材２５が、トップシート２１とバックシート２３との間にホットメルト接着剤等により伸張状態にて接合される。弾性部材２５は、幅方向に延びる少なくとも１本の弾性要素を含む。弾性部材２５が収縮することによりウエストギャザーが形成され、吸収性物品１の着用時に本体部２が着用者の腰周りに密着する。 As shown in FIG. 1, at both ends of the main body 2 in the longitudinal direction, an elastic member 25 extending in the width direction is bonded between the top sheet 21 and the back sheet 23 in a stretched state using a hot melt adhesive or the like. Ru. The elastic member 25 includes at least one elastic element extending in the width direction. Waist gathers are formed by contraction of the elastic member 25, and the main body portion 2 comes into close contact around the wearer's waist when the absorbent article 1 is worn.

一対のサイドシート３のそれぞれは、撥液性または不透液性のサイドシート本体３１と、弾性部材３２とを備える。サイドシート本体３１は、固定部３３と、側壁部４とを備える。固定部３３は、トップシート２１の側部上、および、バックシート２３のトップシート２１から幅方向外側に延出する側部上に固定される。固定部３３とトップシート２１およびバックシート２３との固定は、ホットメルト接着剤等の接着剤を介して行われる。図２および図３では、固定部３３とトップシート２１との間の接着剤４９を平行斜線を付して示している。固定部３３とトップシート２１およびバックシート２３との固定は、例えば、熱融着接合や超音波接合等により行われてもよい。側壁部４は、固定部３３の幅方向内側に連続し、固定部３３と共に長手方向に延びる。吸収性物品１では、一対の側壁部４が、吸収コア２２の両側部近傍においてトップシート２１側に設けられる。側壁部４の詳細については後述する。 Each of the pair of side sheets 3 includes a liquid-repellent or liquid-impermeable side sheet main body 31 and an elastic member 32. The side seat main body 31 includes a fixing portion 33 and a side wall portion 4. The fixing portions 33 are fixed on the sides of the top sheet 21 and on the sides of the back sheet 23 extending outward in the width direction from the top sheet 21 . The fixing portion 33 is fixed to the top sheet 21 and the back sheet 23 using an adhesive such as a hot melt adhesive. In FIGS. 2 and 3, the adhesive 49 between the fixing portion 33 and the top sheet 21 is shown with parallel diagonal lines. The fixing portion 33 may be fixed to the top sheet 21 and the back sheet 23 by, for example, heat fusion bonding, ultrasonic bonding, or the like. The side wall portion 4 continues inside the fixed portion 33 in the width direction and extends in the longitudinal direction together with the fixed portion 33. In the absorbent article 1, a pair of side wall portions 4 are provided on the top sheet 21 side near both side portions of the absorbent core 22. Details of the side wall portion 4 will be described later.

股下部２０２における本体部２の側部では、長手方向に延びる弾性部材３２が、固定部３３とバックシート２３との間にホットメルト接着剤等により伸張状態にて接合される。弾性部材３２は、長手方向に延びる少なくとも１本の弾性要素を含む。弾性部材３２が収縮することにより、固定部３３およびバックシート２３が着用者側に向かって立ち上がり、着用者の脚の付け根近傍に密着するレッグギャザーとなる。トップシート２１の形状によっては、弾性部材３２が、トップシート２１と固定部３３またはバックシート２３との間に配置されてもよい。 At the side part of the main body part 2 in the crotch part 202, an elastic member 32 extending in the longitudinal direction is joined in a stretched state between the fixing part 33 and the back sheet 23 with a hot melt adhesive or the like. Resilient member 32 includes at least one longitudinally extending resilient element. When the elastic member 32 contracts, the fixing portion 33 and the back sheet 23 rise toward the wearer, forming leg gathers that closely fit near the base of the wearer's legs. Depending on the shape of the top sheet 21, the elastic member 32 may be arranged between the top sheet 21 and the fixing portion 33 or the back sheet 23.

吸収コア２２は、例えば、粒状または繊維状の高吸収性材料、および、親水性繊維の集合体のうち、少なくとも一方を吸収材として含む。当該高吸収性材料としては、例えば、粒状の高吸収性ポリマー（ＳＡＰ（Super Absorbent Polymer））、または、繊維状の高吸収性ファイバー（ＳＡＦ（Super Absorbent Fiber））が利用される。当該親水性繊維の集合体は、例えば、粉砕されたパルプ繊維またはセルロース繊維により形成される。 The absorbent core 22 includes, for example, at least one of a granular or fibrous superabsorbent material and an aggregate of hydrophilic fibers as an absorbent material. As the super absorbent material, for example, granular super absorbent polymer (SAP (Super Absorbent Polymer)) or fibrous super absorbent fiber (SAF (Super Absorbent Fiber)) is used. The hydrophilic fiber aggregate is formed of, for example, pulverized pulp fibers or cellulose fibers.

図２および図３に示す例では、吸収コア２２は、上述の親水性繊維の集合体に粒状のＳＡＰを混合したものを、ティッシュペーパーまたは透液性不織布等により包み込むことにより形成される。これにより、親水性繊維の集合体の型崩れ、および、ＳＡＰの脱落（特に、吸液後における脱落）を防止することができる。 In the example shown in FIGS. 2 and 3, the absorbent core 22 is formed by wrapping a mixture of the above-mentioned hydrophilic fiber aggregate with granular SAP in tissue paper, a liquid-permeable nonwoven fabric, or the like. This can prevent the aggregate of hydrophilic fibers from losing its shape and the SAP from falling off (especially falling off after liquid absorption).

トップシート２１は、例えば、透液性の不織布により形成される。当該不織布は、例えば、表面が界面活性剤により親水処理された疎水性繊維（ポリプロピレン、ポリエチレン、ポリエステル、ポリアミド、ナイロン等）により形成される。当該不織布は、セルロース、レーヨンまたはコットン等の親水性繊維により形成されてもよい。当該不織布は、例えば、エアスルー不織布、ポイントボンド不織布、スパンボンド不織布またはスパンレース不織布等である。 The top sheet 21 is formed of, for example, a liquid-permeable nonwoven fabric. The nonwoven fabric is formed of, for example, hydrophobic fibers (polypropylene, polyethylene, polyester, polyamide, nylon, etc.) whose surfaces are hydrophilically treated with a surfactant. The nonwoven fabric may be formed from hydrophilic fibers such as cellulose, rayon, or cotton. The nonwoven fabric is, for example, an air-through nonwoven fabric, a point bond nonwoven fabric, a spunbond nonwoven fabric, or a spunlace nonwoven fabric.

バックシート２３は、例えば、疎水性繊維により形成された不透液性もしくは撥液性の不織布（スパンボンド不織布、メルトブロー不織布またはＳＭＳ（スパンボンド・メルトブロー・スパンボンド）不織布等）、または、不透液性もしくは撥液性のプラスチックフィルムにより形成される。バックシート２３は、当該不織布と当該プラスチックフィルムとの積層体であってもよい。バックシート２３にプラスチックフィルムが利用される場合、吸収性物品１のムレを防止して着用者の快適性を向上するという観点からは、透湿性（すなわち、通気性）を有するプラスチックフィルムが利用されることが好ましい。 The backsheet 23 is made of, for example, a liquid-impermeable or liquid-repellent nonwoven fabric (such as a spunbond nonwoven fabric, a meltblown nonwoven fabric, or an SMS (spunbond meltblown spunbond) nonwoven fabric) formed of hydrophobic fibers, or an impermeable nonwoven fabric made of hydrophobic fibers. It is formed from a liquid-based or liquid-repellent plastic film. The back sheet 23 may be a laminate of the nonwoven fabric and the plastic film. When a plastic film is used for the backsheet 23, a plastic film with moisture permeability (that is, air permeability) is used from the viewpoint of preventing stuffiness of the absorbent article 1 and improving comfort for the wearer. It is preferable that

サイドシート本体３１は、例えば、疎水性繊維にて形成された不透液性または撥液性の不織布（エアスルー不織布、ポイントボンド不織布、スパンボンド不織布、メルトブロー不織布またはＳＭＳ不織布等）により形成される。弾性部材２５，３２の弾性要素としては、例えば、ポリウレタン糸、帯状のポリウレタンフィルム、または、糸状もしくは帯状の天然ゴム等が利用される。本実施の形態では、ポリウレタン糸が弾性要素として利用される。 The side sheet main body 31 is formed of, for example, a liquid-impermeable or liquid-repellent nonwoven fabric (air-through nonwoven fabric, point bond nonwoven fabric, spunbond nonwoven fabric, melt blown nonwoven fabric, SMS nonwoven fabric, etc.) made of hydrophobic fibers. As the elastic elements of the elastic members 25 and 32, for example, a polyurethane thread, a strip-shaped polyurethane film, a thread-shaped or strip-shaped natural rubber, or the like is used. In this embodiment, polyurethane threads are utilized as elastic elements.

次に、側壁部４の詳細について説明する。既述のように、側壁部４は、サイドシート本体３１の一部である。図２および図３に示すように、側壁部４は、側壁基部４１と、第１延出部４３と、第２延出部４４と、第１延出部弾性部材４５と、第２延出部弾性部材４６とを備える。側壁基部４１は、固定部３３から幅方向内側に連続する部位であり、固定部３３と共に長手方向に延びる。側壁基部４１は、基端部４１１と、先端部４１２とを備える。基端部４１１は、固定部３３に連続し、本体部２と接合される。固定部３３の内側縁が、基端部４１１として捉えられてもよい。基端部４１１は、例えば図２に示す股下部２０２では、吸収コア２２の側部よりも幅方向外側に配置され、図３に示す前方部２０１および後方部２０３では、吸収コア２２の側部上に配置される。 Next, details of the side wall portion 4 will be explained. As described above, the side wall portion 4 is a part of the side seat main body 31. As shown in FIGS. 2 and 3, the side wall 4 includes a side wall base 41, a first extension 43, a second extension 44, a first extension elastic member 45, and a second extension. and an elastic member 46. The side wall base 41 is a part that continues inward in the width direction from the fixing part 33 and extends in the longitudinal direction together with the fixing part 33. The side wall base 41 includes a base end 411 and a distal end 412 . The base end portion 411 is continuous with the fixing portion 33 and joined to the main body portion 2 . The inner edge of the fixed portion 33 may be regarded as the proximal end portion 411. For example, in the crotch portion 202 shown in FIG. 2, the base end portion 411 is disposed on the outer side in the width direction than the side portion of the absorbent core 22, and in the front portion 201 and the rear portion 203 shown in FIG. placed on top.

先端部４１２は、側壁基部４１における基端部４１１とは反対側の端部である。長手方向における側壁部４の中央部、すなわち股下部２０２における側壁部４では、側壁基部４１における先端部４１２、および、先端部４１２と基端部４１１との間の部位は、本体部２と非接合である。側壁基部４１の基端部４１１から先端部４１２までの長さは、例えば５～６５ｍｍであり、好ましくは３０～５０ｍｍである。 The distal end portion 412 is an end portion of the side wall base portion 41 on the opposite side from the proximal end portion 411 . In the central part of the side wall part 4 in the longitudinal direction, that is, in the side wall part 4 in the crotch part 202, the distal end part 412 of the side wall base part 41 and the part between the distal end part 412 and the proximal end part 411 are connected to the main body part 2. It is a joining. The length from the proximal end 411 to the distal end 412 of the side wall base 41 is, for example, 5 to 65 mm, preferably 30 to 50 mm.

第１延出部４３および第２延出部４４は、側壁基部４１の先端部４１２から分岐して延びる部位である。第１延出部４３および第２延出部４４は、長手方向における側壁部４の中央部から両端部まで側壁基部４１と共に延びる。図２に示す状態では、各側壁部４における第１延出部４３は、第２延出部４４に対して幅方向内側（他方の側壁部４側）に配置される。好ましい吸収性物品１では、側壁基部４１の先端部４１２から第１延出部４３の先端までの長さ（以下、単に「第１延出部４３の長さ」という。）は、当該先端部４１２から第２延出部４４の先端までの長さ（以下、単に「第２延出部４４の長さ」という。）よりも大きい。第１延出部４３の長さは、例えば第２延出部４４の長さの１．１倍以上であり、好ましくは１．３倍以上である。第１延出部４３の長さは、例えば第２延出部４４の長さの３倍以下である。第２延出部４４の長さは、例えば５～５０ｍｍであり、好ましくは５～３０ｍｍである。 The first extending portion 43 and the second extending portion 44 are portions that branch and extend from the tip portion 412 of the side wall base 41. The first extending portion 43 and the second extending portion 44 extend together with the side wall base 41 from the center of the side wall 4 in the longitudinal direction to both ends. In the state shown in FIG. 2, the first extending portion 43 of each side wall portion 4 is arranged on the inner side in the width direction (on the other side wall portion 4 side) with respect to the second extending portion 44. In the preferable absorbent article 1, the length from the tip 412 of the side wall base 41 to the tip of the first extending portion 43 (hereinafter simply referred to as “the length of the first extending portion 43”) is the same as that of the tip. 412 to the tip of the second extending portion 44 (hereinafter simply referred to as “the length of the second extending portion 44”). The length of the first extending portion 43 is, for example, 1.1 times or more, and preferably 1.3 times or more, the length of the second extending portion 44. The length of the first extending portion 43 is, for example, three times or less the length of the second extending portion 44. The length of the second extending portion 44 is, for example, 5 to 50 mm, preferably 5 to 30 mm.

図３に示す例では、一枚のシート（不織布）を長手方向に沿う複数の折り曲げ線で折り曲げることにより、第１延出部４３および第２延出部４４が形成される。複数の折り曲げ線は、第１延出部４３の先端および第２延出部４４の先端にそれぞれ対応する。図２に示すように、第２延出部４４では、シートが二層に重なる二重構造が全体において形成される。第２延出部４４における二層のシートは、ホットメルト接着剤等の接着剤により互いに接合される。図２および図３では、第１延出部４３と第２延出部４４との区別を容易にするため、第２延出部４４のシート間に平行斜線を付している（吸収性物品１の断面を示す他の図において同様）。第１延出部４３では、シートが二層に重なる二重構造が先端のみにおいて形成される。第１延出部４３における二層のシートは、ホットメルト接着剤等の接着剤により互いに接合される。図２の例では、全体が二重構造で形成される第２延出部４４の剛性が、第１延出部４３の剛性よりも大きくなる。 In the example shown in FIG. 3, the first extending portion 43 and the second extending portion 44 are formed by bending one sheet (nonwoven fabric) along a plurality of bending lines along the longitudinal direction. The plurality of bending lines correspond to the tip of the first extending portion 43 and the tip of the second extending portion 44, respectively. As shown in FIG. 2, the second extending portion 44 has a double structure in which two sheets overlap each other. The two layers of sheets in the second extension 44 are joined together with an adhesive such as a hot melt adhesive. In FIGS. 2 and 3, in order to easily distinguish between the first extension part 43 and the second extension part 44, parallel diagonal lines are added between the sheets of the second extension part 44 (absorbent article 1). In the first extending portion 43, a double structure in which the sheets overlap in two layers is formed only at the tip. The two layers of sheets in the first extension 43 are joined together with an adhesive such as a hot melt adhesive. In the example of FIG. 2, the rigidity of the second extending portion 44, which is entirely formed of a double structure, is greater than the rigidity of the first extending portion 43.

第１延出部４３および第２延出部４４におけるシート同士の接合は、例えば、熱融着接合や超音波接合等により行われてもよい。側壁部４では、第１延出部４３の全体が二重構造で形成され、第２延出部４４の先端のみが二重構造で形成されてもよい。後述するように、シートが三層以上に重なる多重構造が採用されてもよい。また、複数枚のシートの積層体を折り曲げることにより、第１延出部４３および第２延出部４４が形成されてもよい。さらに、第１延出部４３および第２延出部４４の一方または双方が、側壁基部４１と独立したシートにより形成され、側壁基部４１に接合されてもよい。 The sheets may be joined to each other in the first extending portion 43 and the second extending portion 44 by, for example, thermal fusion bonding, ultrasonic bonding, or the like. In the side wall portion 4, the entire first extending portion 43 may be formed with a double structure, and only the tip of the second extending portion 44 may be formed with a double structure. As will be described later, a multilayer structure in which three or more sheets overlap may be adopted. Further, the first extending portion 43 and the second extending portion 44 may be formed by bending a stack of a plurality of sheets. Furthermore, one or both of the first extending portion 43 and the second extending portion 44 may be formed of a sheet independent of the side wall base 41 and may be joined to the side wall base 41.

図３に示すように、長手方向における側壁部４の各端部４８（以下、「固定端部４８」という。）では、側壁基部４１、第１延出部４３および第２延出部４４を本体部２に重ねた状態で、側壁部４がトップシート２１に対して固定される。図３の例では、固定端部４８において、側壁基部４１の先端部４１２が基端部４１１よりも幅方向内側に位置するように、側壁基部４１がトップシート２１上に倒される。そして、側壁基部４１の先端部４１２から第２延出部４４が幅方向内側に広がり、第１延出部４３が幅方向外側に広がった状態で、側壁基部４１、第１延出部４３および第２延出部４４がトップシート２１に沿うように本体部２に重ねられる。第１延出部４３は、側壁基部４１と本体部２との間に配置される。 As shown in FIG. 3, at each end 48 (hereinafter referred to as "fixed end 48") of the side wall 4 in the longitudinal direction, the side wall base 41, the first extending part 43, and the second extending part 44 are connected to each other. The side wall portion 4 is fixed to the top sheet 21 while being stacked on the main body portion 2. In the example of FIG. 3, the side wall base 41 is laid down onto the top sheet 21 at the fixed end 48 so that the tip 412 of the side wall base 41 is located on the inner side in the width direction than the base end 411. Then, with the second extending portion 44 expanding inward in the width direction from the tip portion 412 of the side wall base 41 and the first extending portion 43 expanding outward in the width direction, the side wall base 41, the first extending portion 43, and The second extending portion 44 is stacked on the main body portion 2 along the top sheet 21. The first extending portion 43 is arranged between the side wall base 41 and the main body portion 2 .

側壁部４とトップシート２１との固定は、第２延出部４４とトップシート２１とをホットメルト接着剤等の接着剤４９（図３中に平行斜線を付す。）で接合することにより行われる。第１延出部４３および側壁基部４１もトップシート２１と接合されてもよい。側壁部４とトップシート２１との固定は、例えば、熱融着接合や超音波接合等により行われてもよい。 The side wall portion 4 and the top sheet 21 are fixed by bonding the second extension portion 44 and the top sheet 21 with an adhesive 49 (parallel hatched in FIG. 3) such as a hot melt adhesive. be exposed. The first extending portion 43 and the side wall base 41 may also be joined to the top sheet 21 . The side wall portion 4 and the top sheet 21 may be fixed by, for example, heat fusion bonding, ultrasonic bonding, or the like.

側壁部４において固定端部４８以外では、第１延出部４３および第２延出部４４は、本体部２と非接合である。既述のように、側壁基部４１における先端部４１２、および、先端部４１２と基端部４１１との間の部位も、本体部２と非接合である。このように、股下部２０２では、側壁基部４１の先端部４１２、第１延出部４３および第２延出部４４は、本体部２から離間可能である。 In the side wall portion 4, the first extending portion 43 and the second extending portion 44 are not joined to the main body portion 2 except for the fixed end portion 48. As described above, the distal end portion 412 of the side wall base 41 and the portion between the distal end portion 412 and the proximal end portion 411 are also not joined to the main body portion 2 . Thus, in the crotch portion 202, the tip portion 412, the first extending portion 43, and the second extending portion 44 of the side wall base 41 can be separated from the main body portion 2.

第１延出部４３には、第１延出部弾性部材４５が長手方向に沿って伸張状態にて接合される。第１延出部弾性部材４５は、長手方向に延びる少なくとも１本の第１糸状弾性要素４５１を含む。第２延出部４４には、第２延出部弾性部材４６が長手方向に沿って伸張状態にて接合される。第２延出部弾性部材４６は、長手方向に延びる少なくとも１本の第２糸状弾性要素４６１を含む。第１延出部４３と第１延出部弾性部材４５との接合、および、第２延出部４４と第２延出部弾性部材４６との接合には、例えばホットメルト接着剤等が利用される。第１糸状弾性要素４５１および第２糸状弾性要素４６１として、例えば、ポリウレタン糸、または、糸状の天然ゴム等が利用される。第１延出部弾性部材４５および第２延出部弾性部材４６では、帯状のポリウレタンフィルム、または、帯状の天然ゴム等が利用されてもよい。 A first extending portion elastic member 45 is joined to the first extending portion 43 in a stretched state along the longitudinal direction. The first extension elastic member 45 includes at least one first thread-like elastic element 451 extending in the longitudinal direction. A second extending portion elastic member 46 is joined to the second extending portion 44 in a stretched state along the longitudinal direction. The second extension elastic member 46 includes at least one second thread-like elastic element 461 extending in the longitudinal direction. For example, a hot melt adhesive or the like is used to bond the first extending portion 43 and the first extending portion elastic member 45 and to bond the second extending portion 44 and the second extending portion elastic member 46. be done. As the first thread-like elastic element 451 and the second thread-like elastic element 461, for example, polyurethane thread, thread-like natural rubber, or the like is used. For the first extension elastic member 45 and the second extension elastic member 46, a strip-shaped polyurethane film, a strip-shaped natural rubber, or the like may be used.

図２の例では、第１延出部弾性部材４５は、１本の第１糸状弾性要素４５１を有し、第１糸状弾性要素４５１は、第１延出部４３の先端における二層のシート間に配置される。また、第２延出部弾性部材４６は、２本の第２糸状弾性要素４６１を有する。第２延出部４４における二層のシート間において、一方の第２糸状弾性要素４６１は、第２延出部４４の先端に配置され、他方の第２糸状弾性要素４６１は、当該先端と側壁基部４１の先端部４１２との間の位置に配置される。 In the example of FIG. 2, the first extending portion elastic member 45 has one first thread-like elastic element 451, and the first thread-like elastic element 451 is a two-layer sheet at the tip of the first extending portion 43. placed between. Further, the second extending portion elastic member 46 includes two second thread-like elastic elements 461. Between the two layers of sheets in the second extension part 44, one second thread-like elastic element 461 is arranged at the tip of the second extension part 44, and the other second thread-like elastic element 461 is arranged between the tip and the side wall. It is arranged at a position between the base portion 41 and the tip portion 412 .

上記のように、図２の例では、第１延出部弾性部材４５における第１糸状弾性要素４５１の本数は、第２延出部弾性部材４６における第２糸状弾性要素４６１の本数よりも少なく、第１延出部弾性部材４５の収縮力は、第２延出部弾性部材４６の収縮力よりも小さい。ここで、収縮力は、吸収性物品１を長手方向に伸張した状態において収縮する力である。第１延出部４３の先端に配置された１本の第１糸状弾性要素４５１、および、第２延出部４４の先端に配置された１本の第２糸状弾性要素４６１に注目する場合でも、当該第１糸状弾性要素４５１の収縮力は、当該第２糸状弾性要素４６１の収縮力よりも小さい。 As described above, in the example of FIG. 2, the number of first thread-like elastic elements 451 in the first extension elastic member 45 is smaller than the number of second thread-like elastic elements 461 in the second extension elastic member 46. , the contraction force of the first extension elastic member 45 is smaller than the contraction force of the second extension elastic member 46. Here, the contraction force is a force that causes the absorbent article 1 to contract in a state in which it is stretched in the longitudinal direction. Even when focusing on one first filamentous elastic element 451 arranged at the tip of the first extension part 43 and one second filamentous elastic element 461 arranged at the tip of the second extension part 44, , the contraction force of the first thread-like elastic element 451 is smaller than the contraction force of the second thread-like elastic element 461.

なお、第１延出部４３に接合する際における第１糸状弾性要素４５１の伸張率、または、第１糸状弾性要素４５１の太さもしくは材料等を、第２糸状弾性要素４６１と相違させることにより、当該第１糸状弾性要素４５１の収縮力を、当該第２糸状弾性要素４６１の収縮力と相違させることが可能である。吸収性物品１では、第１延出部弾性部材４５における第１糸状弾性要素４５１の本数を、第２延出部弾性部材４６における第２糸状弾性要素４６１の本数以上としつつ、第１延出部弾性部材４５の収縮力が、第２延出部弾性部材４６の収縮力よりも小さくされてもよい。 Note that by making the elongation rate of the first thread-like elastic element 451 different from the second thread-like elastic element 461 when joining it to the first extension part 43, or the thickness or material of the first thread-like elastic element 451, , it is possible to make the contraction force of the first thread-like elastic element 451 different from the contraction force of the second thread-like elastic element 461. In the absorbent article 1, the number of first thread-like elastic elements 451 in the first extension part elastic member 45 is equal to or greater than the number of second thread-like elastic elements 461 in the second extension part elastic member 46, and the first extension part The contraction force of the elastic member 45 may be smaller than the contraction force of the second elastic member 46 .

吸収性物品１では、第１延出部弾性部材４５および第２延出部弾性部材４６が長手方向に収縮することにより、第１延出部４３および第２延出部４４において両固定端部４８間の部位が長手方向に収縮する。これにより、図２に示すように、側壁基部４１が本体部２から着用者側（図２の上方）に向かって起立し、第１延出部４３および第２延出部４４が本体部２から離間する。このようにして、側壁部４において立体ギャザーが形成される。図２の側壁部４では、第１延出部４３および第２延出部４４のみに弾性部材４５，４６が設けられるが、側壁基部４１に対して弾性部材がさらに設けられてもよい。 In the absorbent article 1, the first extending part elastic member 45 and the second extending part elastic member 46 contract in the longitudinal direction, so that both fixed ends of the first extending part 43 and the second extending part 44 are fixed. The area between 48 and 48 shrinks in the longitudinal direction. As a result, as shown in FIG. 2, the side wall base 41 stands up from the main body 2 toward the wearer (upward in FIG. 2), and the first extending portion 43 and the second extending portion 44 extend from the main body 2. distance from. In this way, three-dimensional gathers are formed in the side wall portion 4. In the side wall portion 4 of FIG. 2, elastic members 45 and 46 are provided only on the first extension portion 43 and the second extension portion 44, but elastic members may be further provided on the side wall base portion 41.

側壁基部４１が起立した状態の股下部２０２では、典型的には、側壁基部４１の先端部４１２は、基端部４１１よりも幅方向内側に位置する。側壁基部４１の先端部４１２が、基端部４１１よりも幅方向外側に位置してもよい。また、第２延出部４４の先端が、側壁基部４１の先端部４１２、および、第１延出部４３の先端よりも本体部２から離れる。すなわち、第２延出部４４の先端は、側壁基部４１の先端部４１２、および、第１延出部４３の先端よりも図２の上方（着用者側）に配置される。したがって、吸収性物品１を着用者に装着した状態では、側壁基部４１の先端部４１２から着用者側に向かって延びる第２延出部４４の先端が、着用者の鼠径部および臀部に接触する。第２延出部４４の先端は、側壁基部４１の先端部４１２よりも幅方向内側に位置する。第２延出部４４の先端が、側壁基部４１の先端部４１２よりも幅方向外側に位置してもよい。 In the crotch portion 202 with the side wall base 41 in an upright state, the tip end 412 of the side wall base 41 is typically located on the inner side in the width direction than the base end 411 . The distal end portion 412 of the side wall base portion 41 may be located outside the base end portion 411 in the width direction. Further, the tip of the second extending portion 44 is further away from the main body portion 2 than the tip portion 412 of the side wall base 41 and the tip of the first extending portion 43 . That is, the distal end of the second extending portion 44 is arranged above the distal end portion 412 of the side wall base 41 and the distal end of the first extending portion 43 in FIG. 2 (on the wearer side). Therefore, when the absorbent article 1 is worn on the wearer, the tip of the second extending portion 44 extending from the tip 412 of the side wall base 41 toward the wearer comes into contact with the groin and buttocks of the wearer. . The tip of the second extending portion 44 is located inside the tip 412 of the side wall base 41 in the width direction. The tip of the second extending portion 44 may be located on the outer side in the width direction than the tip 412 of the side wall base 41.

起立した側壁部４では、第１延出部４３は、第２延出部４４に対して幅方向内側に配置される。また、第１延出部４３の先端が、側壁基部４１の先端部４１２よりも幅方向内側、かつ、第２延出部４４の先端よりも本体部２側（図２の下方）に位置する。第１延出部４３は、側壁基部４１の先端部４１２から幅方向内側に向かって延びる。これにより、本体部２のトップシート２１上において側壁基部４１の近傍には、上方が第１延出部４３により覆われた空間８１（以下、「側部収容空間８１」という。）が形成される。図２の例では、第１延出部４３の先端は、側壁基部４１の先端部４１２よりも上方に位置し、側部収容空間８１の幅方向内側における開口（入口）が大きくなる。第１延出部４３の先端が、側壁基部４１の先端部４１２よりも下方に位置してもよい。 In the upright side wall portion 4, the first extending portion 43 is disposed on the inner side in the width direction with respect to the second extending portion 44. Further, the tip of the first extending portion 43 is located on the inner side in the width direction than the tip 412 of the side wall base 41 and on the main body portion 2 side (lower side in FIG. 2) than the tip of the second extending portion 44. . The first extending portion 43 extends from the tip portion 412 of the side wall base 41 toward the inner side in the width direction. As a result, a space 81 (hereinafter referred to as "side accommodation space 81") whose upper part is covered by the first extension part 43 is formed on the top sheet 21 of the main body part 2 near the side wall base 41. Ru. In the example of FIG. 2, the tip of the first extending portion 43 is located above the tip 412 of the side wall base 41, and the opening (entrance) inside the side accommodation space 81 in the width direction is large. The tip of the first extending portion 43 may be located below the tip 412 of the side wall base 41.

吸収性物品１では、トップシート２１上で受けられた尿等の排泄物が幅方向外側（側壁基部４１側）に移動する場合、当該排泄物が、側壁基部４１および第１延出部４３に囲まれる側部収容空間８１において保持される。側部収容空間８１では、内部の排泄物が、第１延出部４３を超えて第２延出部４４へと到達することも抑制される。その結果、着用者の鼠径部および臀部と吸収性物品１（の第２延出部４４）との間の隙間から、幅方向外側の外部領域へと排泄物が漏れ出す横漏れが抑制される。 In the absorbent article 1, when excrement such as urine received on the top sheet 21 moves outward in the width direction (toward the side wall base 41 side), the excrement is transferred to the side wall base 41 and the first extension portion 43. It is held in the enclosed side accommodation space 81. In the side accommodation space 81, internal excrement is also suppressed from reaching the second extension part 44 beyond the first extension part 43. As a result, lateral leakage in which excrement leaks from the gap between the wearer's groin and buttocks and (the second extension portion 44 of) the absorbent article 1 to the outer region in the width direction is suppressed. .

なお、股下部２０２における側壁基部４１、第１延出部４３および第２延出部４４の位置関係および形状等は、例えば、吸収性物品１の自然収縮状態を形成することにより確認可能である。吸収性物品１の自然収縮状態は、水平な平坦面上において、図１のように着用者側の面を上方に向けた状態で吸収性物品１を載置し、長手方向における吸収性物品１の両端部を掴んで長手方向の両外側に引っ張り、その後、両端部を同時にゆっくりと離すことにより得られる吸収性物品１の状態（形状）である。吸収性物品１の自然収縮状態では、吸収性物品１は、上記平坦面以外の物体には接触していない。 Note that the positional relationship, shape, etc. of the side wall base 41, the first extending portion 43, and the second extending portion 44 in the crotch portion 202 can be confirmed, for example, by forming the absorbent article 1 in a naturally contracted state. . The naturally contracted state of the absorbent article 1 is determined by placing the absorbent article 1 on a horizontal flat surface with the wearer side facing upward as shown in FIG. This is the state (shape) of the absorbent article 1 obtained by grasping both ends of the absorbent article and pulling it outward on both sides in the longitudinal direction, and then slowly releasing both ends at the same time. In the naturally contracted state of the absorbent article 1, the absorbent article 1 is not in contact with any object other than the flat surface.

以上に説明したように、吸収性物品１の各側壁部４では、第１延出部弾性部材４５の収縮力が、第２延出部弾性部材４６の収縮力よりも小さい。これにより、長手方向における側壁部４の中央部では、側壁基部４１が起立した状態において、第１延出部４３が側壁基部４１の先端部４１２から幅方向の内側に向かって延びる。その結果、本体部２上において側壁基部４１の近傍に、第１延出部４３により覆われた側部収容空間８１を形成することができ、横漏れをより確実に抑制することができる。 As explained above, in each side wall portion 4 of the absorbent article 1, the contraction force of the first extension elastic member 45 is smaller than the contraction force of the second extension elastic member 46. As a result, at the central portion of the side wall portion 4 in the longitudinal direction, the first extending portion 43 extends from the tip portion 412 of the side wall base portion 41 toward the inner side in the width direction while the side wall base portion 41 is in an upright state. As a result, the side accommodation space 81 covered by the first extension part 43 can be formed on the main body part 2 in the vicinity of the side wall base part 41, and lateral leakage can be suppressed more reliably.

側壁基部４１の先端部４１２から第１延出部４３の先端までの長さが、当該先端部４１２から第２延出部４４の先端までの長さよりも大きいことにより、側部収容空間８１を覆う第１延出部４３の幅を大きくすることができる。その結果、側部収容空間８１内の排泄物が第１延出部４３を超えて第２延出部４４へと到達することをさらに抑制し、吸収性物品１における横漏れをより一層抑制することができる。また、第１延出部４３の先端に設けられる第１糸状弾性要素４５１の収縮力が、第２延出部４４の先端に設けられる第２糸状弾性要素４６１の収縮力よりも小さいことにより、側壁基部４１の先端部４１２から幅方向の内側に向かって延びる第１延出部４３を容易に実現することができる。 Since the length from the tip 412 of the side wall base 41 to the tip of the first extension 43 is greater than the length from the tip 412 to the tip of the second extension 44, the side storage space 81 is The width of the first extending portion 43 to be covered can be increased. As a result, the excrement in the side storage space 81 is further suppressed from reaching the second extension part 44 beyond the first extension part 43, and lateral leakage in the absorbent article 1 is further suppressed. be able to. Further, since the contractile force of the first thread-like elastic element 451 provided at the tip of the first extending portion 43 is smaller than the contractile force of the second thread-like elastic element 461 provided at the tip of the second extending portion 44, The first extending portion 43 extending inward in the width direction from the tip portion 412 of the side wall base portion 41 can be easily realized.

吸収性物品１では、側壁部４の各固定端部４８において、側壁基部４１の先端部４１２から第１延出部４３および第２延出部４４が幅方向の両側にそれぞれ広がることにより、固定端部４８が厚くなることを防止することができる。これにより、厚い固定端部４８に起因する不快感が着用者において生じることを防止することができる。 In the absorbent article 1, at each fixed end portion 48 of the side wall portion 4, the first extending portion 43 and the second extending portion 44 extend from the distal end portion 412 of the side wall base portion 41 to both sides in the width direction, so that the fixed end portion 48 is fixed. It is possible to prevent the end portion 48 from becoming thicker. This can prevent the wearer from feeling uncomfortable due to the thick fixed end portion 48.

ところで、使い捨ておむつを使用する際に、使い捨ておむつ自体の取替回数を少なくするため、補助吸収具（インナーパッド）を使い捨ておむつの内面上に取り付けることが行われている。使い捨ておむつである図２の吸収性物品１において補助吸収具を利用する場合、図２中に二点鎖線で示すように、補助吸収具７が本体部２の内面上に載置される。補助吸収具７の側部７１（幅方向の端部）は、第１延出部４３の下方の側部収容空間８１に配置され、第１延出部４３と本体部２との間で保持される。このように、図２の吸収性物品１を外装物品（いわゆるアウター）として用いる場合には、側壁部４の第１延出部４３を、本体部２上における補助吸収具７の保持に利用することも可能である。 By the way, when using a disposable diaper, in order to reduce the number of times the disposable diaper itself needs to be replaced, an auxiliary absorbent device (inner pad) is attached to the inner surface of the disposable diaper. When an auxiliary absorbent device is used in the absorbent article 1 of FIG. 2, which is a disposable diaper, the auxiliary absorbent device 7 is placed on the inner surface of the main body portion 2, as shown by the two-dot chain line in FIG. The side portion 71 (end portion in the width direction) of the auxiliary absorbent device 7 is arranged in the side storage space 81 below the first extension portion 43 and is held between the first extension portion 43 and the main body portion 2. be done. In this way, when the absorbent article 1 of FIG. 2 is used as an outer article (so-called outerwear), the first extending portion 43 of the side wall portion 4 is used to hold the auxiliary absorbent device 7 on the main body portion 2. It is also possible.

吸収性物品１の設計によっては、図５に示すように、固定端部４８において第１延出部４３および第２延出部４４が厚さ方向（図５の上下方向）に重ねられてもよい。図５の例では、側壁基部４１が幅方向内側に倒され、先端部４１２が基端部４１１よりも幅方向内側に配置される。そして、側壁基部４１の先端部４１２から第２延出部４４が幅方向内側に広がり、第１延出部４３も幅方向内側に広がった状態で、側壁基部４１、第１延出部４３および第２延出部４４が本体部２に重ねられる。第１延出部４３は、第２延出部４４と本体部２との間に配置される。図５の例では、第１延出部４３が第２延出部４４およびトップシート２１に対して接着剤４９により接合される。 Depending on the design of the absorbent article 1, as shown in FIG. 5, the first extending portion 43 and the second extending portion 44 may be overlapped in the thickness direction (vertical direction in FIG. 5) at the fixed end portion 48. good. In the example of FIG. 5, the side wall base 41 is tilted inward in the width direction, and the distal end portion 412 is disposed inward in the width direction from the base end portion 411. Then, with the second extending portion 44 expanding inward in the width direction from the tip portion 412 of the side wall base 41 and the first extending portion 43 also expanding inward in the width direction, the side wall base 41, the first extending portion 43, and The second extending portion 44 is overlapped with the main body portion 2 . The first extending portion 43 is arranged between the second extending portion 44 and the main body portion 2 . In the example of FIG. 5, the first extending portion 43 is bonded to the second extending portion 44 and the top sheet 21 using an adhesive 49.

上記吸収性物品１では様々な変形が可能である。 The absorbent article 1 can be modified in various ways.

図２、図３および図５にそれぞれ対応する図６ないし図８に示すように、第１延出部４３の先端においてシートが、図２、図３および図５の例とは反対側に折り返されてもよい。また、図６ないし図８の例では、第１延出部４３および第２延出部４４の双方において、シートが二層に重なる二重構造が全体に形成され、第１延出部４３および第２延出部４４の剛性がほぼ同じとなる。図６に示す吸収性物品１では、第２延出部４４の幅方向内側近傍と側部収容空間８１とを仕切る第１延出部４３の剛性を、図２に示す吸収性物品１に比べて大きくすることができる。これにより、排泄物が第１延出部４３を超えて第２延出部４４へと到達することをさらに抑制して、吸収性物品１において横漏れをより確実に抑制することができる。 As shown in FIGS. 6 to 8, which correspond to FIGS. 2, 3, and 5, respectively, the sheet is folded back at the tip of the first extending portion 43 to the opposite side from the example of FIGS. 2, 3, and 5. You may be In addition, in the examples shown in FIGS. 6 to 8, a double structure in which the sheets overlap in two layers is formed in both the first extension part 43 and the second extension part 44, and the first extension part 43 and The rigidity of the second extending portion 44 is approximately the same. In the absorbent article 1 shown in FIG. 6, the rigidity of the first extension part 43 that partitions the widthwise inner vicinity of the second extension part 44 and the side accommodation space 81 is compared with that of the absorbent article 1 shown in FIG. You can make it bigger. Thereby, it is possible to further suppress excrement from exceeding the first extending part 43 and reaching the second extending part 44, and to more reliably suppress lateral leakage in the absorbent article 1.

図９に示すように、シートが三層に重なる多重構造が第１延出部４３の全体において形成され、第１延出部４３の剛性が、第２延出部４４の剛性よりも大きくされてもよい。また、吸収性物品１の設計によっては、図９に示すように、第１延出部４３の長さが、第２延出部４４の長さよりも小さくされてもよい。 As shown in FIG. 9, a multilayer structure in which sheets overlap in three layers is formed throughout the first extension part 43, and the rigidity of the first extension part 43 is greater than the rigidity of the second extension part 44. It's okay. Furthermore, depending on the design of the absorbent article 1, the length of the first extending portion 43 may be made smaller than the length of the second extending portion 44, as shown in FIG.

図１０に示すように、固定端部４８において、先端部４１２が基端部４１１よりも幅方向外側に配置された状態（すなわち、側壁基部４１が幅方向外側に倒された状態）で、側壁基部４１が本体部２に重ねられてもよい。図１０の例では、側壁基部４１の先端部４１２から第１延出部４３が幅方向内側に広がり、第２延出部４４が幅方向外側に広がる。この場合も、図３および図７の例と同様に、固定端部４８が厚くなることをある程度防止することができ、厚い固定端部４８に起因する不快感が着用者において生じることを抑制することができる。以上のように、側壁部４において固定端部４８が厚くなることを防止するという観点では、固定端部４８において、側壁基部４１の先端部４１２から第１延出部４３が幅方向の一方側に広がり、第２延出部４４が幅方向の他方側に広がった状態で、側壁基部４１、第１延出部４３および第２延出部４４が本体部２に重ねられることが好ましい。 As shown in FIG. 10, in the fixed end portion 48, when the distal end portion 412 is disposed on the outer side in the width direction than the base end portion 411 (that is, in the state in which the side wall base portion 41 is tilted outward in the width direction), the side wall The base portion 41 may be overlapped with the main body portion 2. In the example of FIG. 10, the first extending portion 43 extends inward in the width direction from the tip portion 412 of the side wall base 41, and the second extending portion 44 extends outward in the width direction. In this case as well, as in the examples of FIGS. 3 and 7, it is possible to prevent the fixed end portion 48 from becoming thicker to some extent, and to suppress the wearer from feeling uncomfortable due to the thick fixed end portion 48. be able to. As described above, from the viewpoint of preventing the fixed end portion 48 from becoming thick in the side wall portion 4, in the fixed end portion 48, the first extending portion 43 from the tip portion 412 of the side wall base portion 41 is on one side in the width direction. It is preferable that the side wall base 41, the first extending portion 43, and the second extending portion 44 are stacked on the main body portion 2 with the second extending portion 44 extending to the other side in the width direction.

上記側壁部４は、テープタイプの使い捨ておむつ以外の様々な吸収性物品（例えば、パンツタイプの使い捨ておむつ、補助吸収具、失禁パッドまたは生理用品）において用いられてよい。 The side wall portion 4 may be used in various absorbent articles other than tape-type disposable diapers (for example, pants-type disposable diapers, auxiliary absorbent devices, incontinence pads, or sanitary products).

上記実施の形態および各変形例における構成は、相互に矛盾しない限り適宜組み合わされてよい。 The configurations of the above embodiment and each modification may be combined as appropriate unless mutually contradictory.

１吸収性物品
２本体部
４側壁部
２１トップシート
２２吸収コア
２３バックシート
４１側壁基部
４３第１延出部
４４第２延出部
４５第１延出部弾性部材
４６第２延出部弾性部材
４８固定端部
４１１基端部
４１２先端部
４５１第１糸状弾性要素
４６１第２糸状弾性要素 1 Absorbent article 2 Main body part 4 Side wall part 21 Top sheet 22 Absorbent core 23 Back sheet 41 Side wall base 43 First extending part 44 Second extending part 45 First extending part elastic member 46 Second extending part elastic member 48 Fixed end portion 411 Base end portion 412 Distal end portion 451 First filamentous elastic element 461 Second filamentous elastic element

Claims

An absorbent article,
a sheet-like main body portion extending in the longitudinal direction, in which an absorbent core is disposed between a back sheet and a top sheet;
a pair of side wall portions provided on the top sheet side near both side portions of the absorbent core and extending in the longitudinal direction;
Equipped with
Each side wall is
a side wall base extending in the longitudinal direction and having a base end portion joined to the main body portion at a central portion in the longitudinal direction and a distal end portion not joined to the main body portion;
a first extending portion and a second extending portion that branch and extend from the tip end of the side wall base in the central portion;
A first extension part that is joined to the first extension part and the second extension part along the longitudinal direction and contracts in the longitudinal direction, thereby causing the side wall base to stand up in the central part. an elastic member and a second extension elastic member;
Equipped with
In the central portion where the side wall base is in an upright state, the first extending portion is disposed inside the second extending portion in the width direction perpendicular to the longitudinal direction,
The contraction force of the first extension elastic member is smaller than the contraction force of the second extension elastic member,
The first extension part and the second extension part extend from the central part to both ends of each side wall part in the longitudinal direction, and at both ends of each side wall part, the side wall base The side wall base, the first extending portion, and the first extending portion are tilted inward in the width direction and the first extending portion is disposed between the side wall base or the second extending portion and the main body portion. An absorbent article characterized in that two extending portions are stacked on the main body portion .

The absorbent article according to claim 1,
The second extending portion elastic member includes a second filamentous elastic element provided at the tip of the second extending portion,
An absorbent article characterized in that the first extending portion elastic member includes a first thread-like elastic element that is provided at the tip of the first extending portion and has a smaller contractile force than the second thread-like elastic element.

The absorbent article according to claim 1 or 2,
The absorbent article, wherein the first extending portion extends inward in the width direction from the distal end portion of the side wall base in the central portion where the side wall base is upright.

An absorbent article,
a sheet-like main body portion extending in the longitudinal direction, in which an absorbent core is disposed between a back sheet and a top sheet;
a pair of side wall portions provided on the top sheet side near both side portions of the absorbent core and extending in the longitudinal direction;
Equipped with
Each side wall is
a side wall base extending in the longitudinal direction and having a base end portion joined to the main body portion at a central portion in the longitudinal direction and a distal end portion not joined to the main body portion;
a first extending portion and a second extending portion that branch and extend from the distal end portion of the side wall base in the central portion;
A first extension part that is joined to the first extension part and the second extension part along the longitudinal direction and contracts in the longitudinal direction, thereby causing the side wall base to stand up in the central part. an elastic member and a second extension elastic member;
Equipped with
In the central portion where the side wall base is in an upright state, the first extending portion is disposed inside the second extending portion in the width direction perpendicular to the longitudinal direction, and the first extending portion is , extending inward in the width direction from the tip of the side wall base;
The first extension part and the second extension part extend from the central part to both ends of each side wall part in the longitudinal direction, and at both ends of each side wall part, the side wall base The side wall base, the first extending portion, and the first extending portion are tilted inward in the width direction, and the first extending portion is disposed between the side wall base or the second extending portion and the main body portion. An absorbent article characterized in that two extending portions are stacked on the main body portion .

The absorbent article according to any one of claims 1 to 4,
An absorbent article characterized in that, in the central portion where the side wall base is in an upright state, a tip of the second extending portion is located inside in the width direction from the tip of the side wall base.

The absorbent article according to any one of claims 1 to 5,
An absorbent characterized in that a length from the tip of the side wall base to the tip of the first extension is greater than a length from the tip of the side wall base to the tip of the second extension. Sex items.

The absorbent article according to any one of claims 1 to 6,
An absorbent article characterized in that the first extending portion has a greater rigidity than the second extending portion.

The absorbent article according to any one of claims 1 to 7,
At both ends of each side wall, the first extending portion extends outward in the width direction from the tip end of the side wall base, and the second extending portion extends inward in the width direction. An absorbent article characterized in that it is in a state of being