JP2021007617A

JP2021007617A - Absorbent articles

Info

Publication number: JP2021007617A
Application number: JP2019122774A
Authority: JP
Inventors: 淳生福元; Atsuo Fukumoto
Original assignee: Livedo Corp
Current assignee: Livedo Corp
Priority date: 2019-07-01
Filing date: 2019-07-01
Publication date: 2021-01-28
Anticipated expiration: 2039-07-01
Also published as: JP7372769B2

Abstract

To make it possible to more reliably suppress lateral leakage in absorbent articles.SOLUTION: A side wall base 41 of each side wall 4 of an absorbent article 1 has a base end 411 joined to a main body 2 in the central portion in the lengthwise direction and a tip 412 not joined to the main body 2. A first extension portion 43 and a second extension portion 44 branch off from the tip portion 412 of the side wall base 41 in the central portion. As a first extension portion elastic member 45 and a second extension portion elastic member 46 joined to the first extension portion 43 and the second extension portion 44 contract, the side wall base 41 in the central portion stands up. When the side wall base 41 stands upright, the first extension portion 43 is arranged within an inner side of the second extension portion 44 in a width direction. Since the contraction force of the first extension portion elastic member 45 is smaller than the contraction force of the second extension portion elastic member 46, the first extension portion 43 extends from the tip portion 412 of the side wall base 41 toward its inside in the width direction, thus ensuring that lateral leakage of excrement is more reliably suppressed.SELECTED DRAWING: Figure 2

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。 Conventionally, an absorbent article having a pair of side wall portions on both side portions has been put into practical use. For example, in Patent Document 1, the side wall portion (leakage-proof wall) has a side wall base portion (base wall portion) that rises from the surface layer and a first extending portion that extends outward in the width direction from the vicinity of the tip end portion of the side wall base portion. And has a second extension. A plurality of elastic members are arranged in each of the first extension portion and the second extension portion along the longitudinal direction of the absorbent article. Further, the rigidity of the second extension portion arranged below the first extension portion is made larger than the rigidity of the first extension portion, and the second extension portion hits the vicinity of the inguinal region of the wearer. Get in touch.

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。 In addition, Patent Document 2 discloses a double cuff having a first cuff and a second cuff. The first cuff and the second cuff stand up with the bonding position with the diaper as the base end.

特開２００９−１７８２７４号公報JP-A-2009-178274 特表２００７−５３１５８７号公報Special Table 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, in the structure of Patent Document 1, there is a possibility that lateral leakage of excrement cannot be sufficiently suppressed depending on the amount of excrement such as urine. Therefore, there is a demand for a new structure capable of more reliably suppressing lateral 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 lateral 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い。 The invention according to claim 1 is an absorbent article, in which an absorbent core is arranged between a back sheet and a top sheet, a sheet-shaped main body extending in the longitudinal direction, and the vicinity of both side portions of the absorbent core. Provided with a pair of side wall portions extending in the longitudinal direction, each side wall portion extending in the longitudinal direction and a base end joined to the main body portion in the central portion in the longitudinal direction. A side wall base having a tip portion that is not joined to the main body portion, a first extension portion and a second extension portion that branch off from the tip portion of the side wall base portion at the central portion, and the first extension portion. A first extension portion elastic member and a first extension portion elastic member that erects the side wall base portion in the central portion by being joined to the protrusion portion and the second extension portion along the longitudinal direction and contracting in the longitudinal direction. In the central portion in which the side wall base portion is erected with the elastic member of the extending portion, the first extending portion is inside the width direction perpendicular to the longitudinal direction with respect to the second extending portion. The contraction force of the first extension portion elastic member is smaller than the contraction force of the second extension portion elastic member.

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 extension portion elastic member has a second filamentous elastic element provided at the tip of the second extension portion. The elastic member of the first extension portion is provided at the tip of the first extension portion and has a first filamentous elastic element having a contraction force smaller than that of 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, wherein the first extending portion is the said portion of the side wall base portion in the central portion in a state where the side wall base portion is upright. It extends inward in the width direction from the tip portion.

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る。 The invention according to claim 4 is an absorbent article, in which an absorbent core is arranged between a back sheet and a top sheet, a sheet-shaped main body extending in the longitudinal direction, and the vicinity of both side portions of the absorbent core. Provided with a pair of side wall portions extending in the longitudinal direction, each side wall portion extending in the longitudinal direction and a base end joined to the main body portion in the central portion in the longitudinal direction. A side wall base portion having a tip portion that is not joined to the main body portion and the main body portion, a first extension portion and a second extension portion that branch off from the tip portion of the side wall base portion at the central portion, and the first extension portion. A first extension portion elastic member and a first extension portion elastic member that erects the side wall base portion in the central portion by being joined to the protrusion portion and the second extension portion along the longitudinal direction and contracting in the longitudinal direction. In the central portion having two extending portion elastic members and the side wall base portion standing upright, the first extending portion is inside the width direction perpendicular to the longitudinal direction with respect to the second extending portion. The first extending portion is arranged and extends inward in the width direction from the tip portion of the side wall base portion.

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, wherein the tip of the second extending portion is in the central portion in a state where the side wall base is upright. Is located inside the front end portion of the side wall base portion in the width direction.

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 end portion of the side wall base portion to the tip end portion of the first extension portion is , 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 rigidity of the first extension portion is larger than the rigidity of the second extension 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、前記側壁基部の前記先端部から前記第１延出部が前記幅方向の一方側に広がり、前記第２延出部が前記幅方向の他方側に広がった状態で、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 8 is the absorbent article according to any one of claims 1 to 7, wherein the first extension portion and the second extension portion are longitudinal from the central portion. The first extending portion extends from the tip end portion of the side wall base portion to one side in the width direction at both end portions of the side wall portions extending in the direction. 2 The side wall base portion, the first extension portion, and the second extension portion are overlapped with the main body portion in a state where the extension portion extends to the other side 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, lateral 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 which shows the absorbent article. 吸収性物品の股下部における断面図である。It is sectional drawing in the crotch part of an absorbent article. 吸収性物品の前方部における断面図である。It is sectional drawing in 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 which shows 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 sectional drawing in 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。It is sectional drawing in the inseam 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 sectional drawing in 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 sectional drawing in 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。It is sectional drawing in the inseam 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 sectional drawing in 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 an embodiment of the present invention in an unfolded state. FIG. 2 is a cross-sectional view of the disposable absorbent article 1 cut at the position II-II in FIG. 1 in a plane perpendicular to the longitudinal direction (that is, the vertical direction in FIG. 1), and FIG. It is sectional drawing which cut | cut the sex article 1 at the position of III-III in FIG. 1 in the plane perpendicular to the longitudinal direction. 2 and 3 show cross sections of the inseam 202 and the front 201, which will be described later, respectively. In FIGS. 2 and 3, for convenience of illustration, each configuration of the disposable absorbent article 1 is drawn separated in the stacking direction (thickness direction) (similar to other figures showing a cross section 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 is simply referred to as "absorbent article 1". The absorbent article 1 is a tape-type disposable diaper in which a portion that contacts the wearer's ventral side and a portion that contacts the dorsal side are fastened around the waist by connecting portions 11 on both the left and right sides. The absorbent article 1 receives excrement from the wearer. In FIG. 1, the absorbent article 1 is drawn with the surface on the side that comes into contact with the wearer (that is, the wearer side) when worn as the front.

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 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 side portions of the main body 2 (that is, both ends in the width direction perpendicular to the longitudinal direction). In the example shown in FIG. 1, the pair of side seats 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, the upper portion 201 and the lower portion 203 in FIG. 1 come into contact with the wearer's ventral and dorsal skin, respectively. In the following description, the parts 201 and 203 will be referred to as "front part 201" and "rear part 203", respectively. Further, a portion 202 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 a “crotch lower portion 202”. The inseam 202 faces the wearer's crotch. The absorbent article 1 has a front portion 201, a crotch portion 202, and a rear portion 203 in this order in the longitudinal direction. In the example shown in FIG. 1, the width of the front portion 201 and the rear portion 203 in the width direction (hereinafter, also simply referred to as “width”) is larger than the width of the inseam portion 202. In other words, the absorbent article 1 is a so-called hourglass type in a 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 portions 11 provided on both sides of the rear portion 203. When the absorbent article 1 is attached to the wearer, the pair of connecting portions 11 as shown in FIG. 4 with the front portion 201 and the rear portion 203 in contact with the ventral side and the dorsal side of the wearer, respectively. Is anchored to the anchored portion 26 on the outer surface of the front portion 201 (that is, the surface opposite to the surface in contact with the wearer). As a result, both side portions of the rear portion 203 are connected to both side portions of the front portion 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 fastening portion 26 is a loop member of a hook-and-loop fastener that is joined to the outer surface of the back sheet 23 (that is, the surface opposite to the wearer) described later by a hot melt adhesive or the like. The fastening portion 26 has a fine loop structure. The fine loop structure means a set of a large number of fine loop elements. On the inner surface of the pair of connecting portions 11, for example, a hook member of a hook-and-loop fastener that can be fastened to the landing portion 26 is provided. The inner surface of the connecting portion 11 is a surface facing the outer surface of the front portion 201 with the absorbent article 1 attached to the wearer. The hook member has a fine hook structure. The fine hook structure means a set 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 2 includes a top sheet 21, an absorption 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 impermeable sheet member. The absorption core 22 has a substantially sheet shape extending in the longitudinal direction, and is arranged between the top sheet 21 and the back sheet 23. The main surface of the absorption core 22 on the wearer side is covered with the top sheet 21. The other main surface of the absorption core 22, that is, the main surface opposite to the wearer, is covered with the back sheet 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 absorption core 22 is drawn by a thick broken line in order to facilitate the understanding of the figure. In the example shown in FIG. 1, the width of the absorption core 22 in the front portion 201 and the rear portion 203 is larger than the width of the absorption core 22 in the crotch portion 202. In other words, the absorption core 22 is a so-called hourglass type in a plan view. Of course, the shape of the absorption core 22 may be arbitrarily changed.

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 absorption core 22. The fixing of the top sheet 21 and the back sheet 23 is performed, for example, via a hot melt adhesive. The top sheet 21 and the back sheet 23 may be fixed by heat 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 side portions 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。 The top sheet 21 quickly captures the water content of the excrement from the wearer and moves the water content to the absorption core 22. The absorption core 22 absorbs and fixes the water that has permeated the top sheet 21 (that is, the water of excrement from the wearer). The back sheet 23 prevents the water of the excrement that has reached the back sheet 23 from seeping out to the outside of the main body 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 in the longitudinal direction of the main body 2, elastic members 25 extending in the width direction are joined between the top sheet 21 and the back sheet 23 in an stretched state by a hot melt adhesive or the like. To. The elastic member 25 includes at least one elastic element extending in the width direction. Waist gathers are formed by the contraction of the elastic member 25, and the main body 2 comes into close contact with 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 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 portion 33 is fixed on the side portion of the top sheet 21 and on the side portion of the back sheet 23 extending outward in the width direction from the top sheet 21. The fixing portion 33 and the top sheet 21 and the back sheet 23 are fixed via 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 and the top sheet 21 and the back sheet 23 may be fixed by, for example, heat bonding or ultrasonic bonding. The side wall portion 4 is continuous inward in the width direction of the fixing portion 33 and extends in the longitudinal direction together with the fixing portion 33. In the absorbent article 1, a pair of side wall portions 4 are provided on the top sheet 21 side in the vicinity of both side portions of the absorbing core 22. The 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 portion of the main body portion 2 in the crotch portion 202, the elastic member 32 extending in the longitudinal direction is joined between the fixing portion 33 and the back sheet 23 in an stretched state by a hot melt adhesive or the like. The elastic member 32 includes at least one elastic element extending in the longitudinal direction. When the elastic member 32 contracts, the fixing portion 33 and the back sheet 23 stand up toward the wearer side, and become leg gathers that come into close contact with the vicinity of 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 absorption core 22 includes, for example, at least one of a granular or fibrous highly absorbent material and an aggregate of hydrophilic fibers as an absorbent material. As the highly absorbent material, for example, a granular super absorbent polymer (SAP (Super Absorbent Polymer)) or a fibrous super absorbent fiber (SAF (Super Absorbent Fiber)) is used. The aggregate of the hydrophilic fibers is formed of, for example, crushed 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 absorption core 22 is formed by wrapping the above-mentioned aggregate of hydrophilic fibers mixed with granular SAP with tissue paper, a liquid-permeable non-woven fabric, or the like. As a result, it is possible to prevent the aggregate of hydrophilic fibers from losing its shape and the SAP from falling off (particularly, falling off after absorbing liquid).

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 non-woven fabric. The non-woven fabric is formed of, for example, hydrophobic fibers (polypropylene, polyethylene, polyester, polyamide, nylon, etc.) whose surface is hydrophilically treated with a surfactant. The non-woven fabric may be formed of hydrophilic fibers such as cellulose, rayon or cotton. The non-woven fabric is, for example, an air-through non-woven fabric, a point-bonded non-woven fabric, a spunbonded non-woven fabric, a spunlaced non-woven fabric, or the like.

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, for example, a liquid-impermeable or liquid-repellent non-woven fabric (spunbond non-woven fabric, melt-blow non-woven fabric, SMS (spunbond, melt-blow, spunbond) non-woven fabric, etc.) formed of hydrophobic fibers, or impermeable. Formed from a liquid or liquid repellent plastic film. The back sheet 23 may be a laminate of the non-woven fabric and the plastic film. When a plastic film is used for the back sheet 23, a breathable (that is, breathable) plastic film is used from the viewpoint of preventing stuffiness of the absorbent article 1 and improving the comfort of the wearer. Is preferable.

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, an impermeable or liquid-repellent non-woven fabric (air-through non-woven fabric, point bond non-woven fabric, spunbond non-woven fabric, melt blow non-woven fabric, SMS non-woven fabric, etc.) formed of hydrophobic fibers. As the elastic elements of the elastic members 25 and 32, for example, polyurethane yarn, strip-shaped polyurethane film, thread-shaped or strip-shaped natural rubber, or the like is used. In this embodiment, the polyurethane yarn is used as an elastic element.

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, the details of the side wall portion 4 will be described. 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 portion 4 includes a side wall base portion 41, a first extension portion 43, a second extension portion 44, a first extension portion elastic member 45, and a second extension portion. The part elastic member 46 is provided. The side wall base 41 is a portion continuous inward in the width direction from the fixing portion 33, and extends in the longitudinal direction together with the fixing portion 33. The side wall base 41 includes a base end portion 411 and a tip end portion 412. The base end portion 411 is continuous with the fixing portion 33 and is joined to the main body portion 2. The inner edge of the fixing portion 33 may be regarded as the base end portion 411. The base end portion 411 is arranged outside the side portion of the absorption core 22 in the width direction in the crotch portion 202 shown in FIG. 2, for example, and the side portion of the absorption core 22 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 tip portion 412 is an end portion of the side wall base portion 41 opposite to the base end portion 411. In the central portion of the side wall portion 4 in the longitudinal direction, that is, the side wall portion 4 in the crotch portion 202, the tip portion 412 in the side wall base portion 41 and the portion between the tip portion 412 and the base end portion 411 are not the main body portion 2 and the portion. It is a joint. The length from the base end portion 411 to the tip end portion 412 of the side wall base portion 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 off and extend from the tip portion 412 of the side wall base portion 41. The first extending portion 43 and the second extending portion 44 extend together with the side wall base portion 41 from the central portion to both end portions of the side wall portion 4 in the longitudinal direction. In the state shown in FIG. 2, the first extending portion 43 in each side wall portion 4 is arranged inside in the width direction (on the other side wall portion 4 side) with respect to the second extending portion 44. In the preferred absorbent article 1, the length from the tip portion 412 of the side wall base portion 41 to the tip end of the first extension portion 43 (hereinafter, simply referred to as “the length of the first extension portion 43”) is the tip portion. It is larger than the length from 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, 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 extension portion 43 and the second extension 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 tips of the first extension 43 and the tips of the second extension 44, respectively. As shown in FIG. 2, in the second extending portion 44, a double structure in which the sheets are overlapped in two layers is formed as a whole. The two layers of sheets in the second extending portion 44 are joined to each other by an adhesive such as a hot melt adhesive. In FIGS. 2 and 3, parallel diagonal lines are provided between the sheets of the second extension 44 in order to facilitate the distinction between the first extension 43 and the second extension 44 (absorbent article). The same applies to the other figures showing the cross section of 1). In the first extending portion 43, a double structure in which the sheets are overlapped in two layers is formed only at the tip. The two layers of sheets in the first extending portion 43 are joined to each other by an adhesive such as a hot melt adhesive. In the example of FIG. 2, the rigidity of the second extending portion 44, which is formed entirely of a double structure, is larger 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 in the first extension portion 43 and the second extension portion 44 may be bonded to each other by, for example, heat bonding or ultrasonic bonding. 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 multi-layer structure in which three or more sheets are stacked may be adopted. Further, the first extension portion 43 and the second extension portion 44 may be formed by bending the laminated body of a plurality of sheets. Further, one or both of the first extension portion 43 and the second extension portion 44 may be formed of a sheet independent of the side wall base portion 41 and may be joined to the side wall base portion 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 of the side wall 4 in the longitudinal direction (hereinafter, referred to as “fixed end 48”), the side wall base 41, the first extension 43, and the second extension 44 are provided. The side wall portion 4 is fixed to the top sheet 21 in a state of being overlapped with the main body portion 2. In the example of FIG. 3, at the fixed end 48, the side wall base 41 is tilted onto the top sheet 21 so that the tip 412 of the side wall base 41 is located inside the base end 411 in the width direction. Then, with the second extending portion 44 extending inward in the width direction and the first extending portion 43 extending outward in the width direction from the tip end portion 412 of the side wall base portion 41, the side wall base portion 41, the first extending portion 43 and The second extending portion 44 is overlapped with the main body portion 2 so as to be along the top sheet 21. The first extending portion 43 is arranged between the side wall base portion 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 joining the second extending portion 44 and the top sheet 21 with an adhesive 49 (parallel diagonal lines are provided in FIG. 3) such as a hot melt adhesive. It is said. The first extending portion 43 and the side wall base portion 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 bonding or ultrasonic bonding.

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, except for the fixed end portion 48, the first extending portion 43 and the second extending portion 44 are not joined to the main body portion 2. As described above, the tip portion 412 of the side wall base portion 41 and the portion between the tip portion 412 and the base end portion 411 are also non-bonded to the main body portion 2. As described above, in the crotch portion 202, the tip portion 412, the first extension portion 43, and the second extension portion 44 of the side wall base portion 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。 The first extension portion elastic member 45 is joined to the first extension portion 43 in an extended state along the longitudinal direction. The first extension elastic member 45 includes at least one first filamentous elastic element 451 extending in the longitudinal direction. A second extension portion elastic member 46 is joined to the second extension portion 44 in an extended 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 for joining the first extension portion 43 and the first extension portion elastic member 45 and joining the second extension portion 44 and the second extension portion elastic member 46. Will be done. As the first filamentous elastic element 451 and the second filamentous elastic element 461, for example, polyurethane yarn, filamentous natural rubber, or the like is used. In the first extension portion elastic member 45 and the second extension portion 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 extension 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 extension portion 43. Placed in between. Further, the second extension portion elastic member 46 has two second thread-like elastic elements 461. Between the two layers of sheets in the second extension 44, one second thread-like elastic element 461 is arranged at the tip of the second extension 44, and the other second thread-like elastic element 461 is the tip and the side wall. It is arranged at a position between the base 41 and the tip 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 the first thread-like elastic elements 451 in the first extension portion elastic member 45 is smaller than the number of the second thread-like elastic elements 461 in the second extension portion elastic member 46. The contraction force of the first extension portion elastic member 45 is smaller than the contraction force of the second extension portion elastic member 46. Here, the contraction force is a force that contracts the absorbent article 1 in a state of being stretched in the longitudinal direction. Even when paying attention to one first filamentous elastic element 451 arranged at the tip of the first extending portion 43 and one second filamentous elastic element 461 arranged at the tip of the second extending portion 44. The contraction force of the first filamentous elastic element 451 is smaller than the contraction force of the second filamentous 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。 By making the elongation rate of the first filamentous elastic element 451 or the thickness or material of the first filamentous elastic element 451 at the time of joining to the first extension portion 43 different from that of the second filamentous elastic element 461. It is possible to make the contraction force of the first filamentous elastic element 451 different from the contractile force of the second filamentous elastic element 461. In the absorbent article 1, the number of the first thread-like elastic elements 451 in the first extension portion elastic member 45 is set to be equal to or greater than the number of the second thread-like elastic elements 461 in the second extension portion elastic member 46, and the first extension is performed. The contraction force of the part elastic member 45 may be smaller than the contraction force of the second extension part 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 extension portion elastic member 45 and the second extension portion elastic member 46 contract in the longitudinal direction, so that both fixed ends of the first extension portion 43 and the second extension portion 44 are fixed. The part between 48 contracts 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 side (upper side of FIG. 2), and the first extension 43 and the second extension 44 are the main body 2. Separate from. In this way, three-dimensional gathers are formed on 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 in which the side wall base portion 41 is in an upright position, the tip portion 412 of the side wall base portion 41 is typically located inside the base end portion 411 in the width direction. The tip 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 separated from the main body portion 2 from the tip portion 412 of the side wall base portion 41 and the tip of the first extending portion 43. That is, the tip of the second extending portion 44 is arranged above the tip portion 412 of the side wall base portion 41 and the tip of the first extending portion 43 (on the wearer side) in FIG. Therefore, when the absorbent article 1 is attached to the wearer, the tip of the second extending portion 44 extending from the tip portion 412 of the side wall base 41 toward the wearer side comes into contact with the wearer's groin and buttocks. .. The tip of the second extending portion 44 is located inside the tip portion 412 of the side wall base 41 in the width direction. The tip of the second extending portion 44 may be located outside the tip portion 412 of the side wall base portion 41 in the width direction.

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 arranged inside in the width direction with respect to the second extending portion 44. Further, the tip of the first extending portion 43 is located inside the tip portion 412 of the side wall base portion 41 in the width direction and on the main body portion 2 side (lower side of FIG. 2) of the tip of the second extending portion 44. .. The first extending portion 43 extends inward in the width direction from the tip portion 412 of the side wall base portion 41. As a result, a space 81 (hereinafter, referred to as “side accommodation space 81”) is formed on the top sheet 21 of the main body 2 in the vicinity of the side wall base 41, the upper part of which is covered by the first extending portion 43. To. In the example of FIG. 2, the tip of the first extending portion 43 is located above the tip portion 412 of the side wall base portion 41, and the opening (entrance) inside the side accommodating space 81 in the width direction becomes large. The tip of the first extending portion 43 may be located below the tip portion 412 of the side wall base portion 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 to the outside in the width direction (side of the side wall base 41), the excrement is transferred to the side wall base 41 and the first extending portion 43. It is held in the enclosed side accommodation space 81. In the side accommodating space 81, it is also suppressed that the internal excrement exceeds the first extending portion 43 and reaches the second extending portion 44. As a result, lateral leakage of excrement leaking from the gap between the wearer's inguinal region and buttocks and the absorbent article 1 (the second extending portion 44) to the outer region outside 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。 The positional relationship and shape of the side wall base 41, the first extension 43, and the second extension 44 in the crotch portion 202 can be confirmed, for example, by forming the naturally contracted state of the absorbent article 1. .. In the naturally contracted state of the absorbent article 1, the absorbent article 1 is placed on a horizontal flat surface with the wearer's side facing upward as shown in FIG. 1, and the absorbent article 1 is placed in the longitudinal direction. This is the state (shape) of the absorbent article 1 obtained by grasping both ends of the article and pulling it to both outer sides in the longitudinal direction, and then slowly separating 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 an 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 described above, in each side wall portion 4 of the absorbent article 1, the contraction force of the first extension portion elastic member 45 is smaller than the contraction force of the second extension portion elastic member 46. As a result, in the central portion of the side wall portion 4 in the longitudinal direction, the first extending portion 43 extends inward in the width direction from the tip portion 412 of the side wall base portion 41 in a state where the side wall base portion 41 stands upright. As a result, the side accommodating space 81 covered by the first extending portion 43 can be formed in the vicinity of the side wall base 41 on the main body 2, 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 end portion 412 of the side wall base portion 41 to the tip end of the first extension portion 43 is larger than the length from the tip end portion 412 to the tip end of the second extension portion 44, the side accommodation space 81 is provided. The width of the first extending portion 43 to be covered can be increased. As a result, the excrement in the side accommodating space 81 is further suppressed from reaching the second extending portion 44 beyond the first extending portion 43, and the lateral leakage in the absorbent article 1 is further suppressed. be able to. Further, the contraction force of the first filamentous elastic element 451 provided at the tip of the first extension portion 43 is smaller than the contraction force of the second filamentous elastic element 461 provided at the tip of the second extension 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 48 of the side wall 4, the first extension 43 and the second extension 44 extend from the tip 412 of the side wall base 41 to both sides in the width direction to be fixed. It is possible to prevent the end portion 48 from becoming thick. This makes it possible to prevent the wearer from experiencing discomfort due to the thick fixed end 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 a disposable diaper is used, an auxiliary absorber (inner pad) is attached on the inner surface of the disposable diaper in order to reduce the number of times the disposable diaper itself is replaced. When the auxiliary absorbent is used in the absorbent article 1 of FIG. 2, which is a disposable diaper, the auxiliary absorbent 7 is placed on the inner surface of the main body 2 as shown by the alternate long and short dash line in FIG. The side portion 71 (end in the width direction) of the auxiliary absorber 7 is arranged in the side portion accommodating space 81 below the first extension portion 43, and is held between the first extension portion 43 and the main body portion 2. Will be done. As described above, when the absorbent article 1 of FIG. 2 is used as an exterior article (so-called outer), the first extending portion 43 of the side wall portion 4 is used to hold the auxiliary absorber 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, even if the first extending portion 43 and the second extending portion 44 are 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 portion 41 is tilted inward in the width direction, and the tip portion 412 is arranged inside the base end portion 411 in the width direction. Then, in a state where the second extending portion 44 extends inward in the width direction from the tip end portion 412 of the side wall base 41 and the first extending portion 43 also expands 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 extension portion 43 is arranged between the second extension portion 44 and the main body portion 2. In the example of FIG. 5, the first extending portion 43 is joined to the second extending portion 44 and the top sheet 21 by the 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 variously modified.

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 corresponding to FIGS. 2, 3 and 5, the sheet is folded back at the tip of the first extending portion 43 on the opposite side to the examples of FIGS. 2, 3 and 5. It may be. Further, in the examples of FIGS. 6 to 8, in both the first extension portion 43 and the second extension portion 44, a double structure in which the sheets are overlapped in two layers is formed as a whole, and the first extension portion 43 and the first extension portion 43 and The rigidity of the second extending portion 44 is almost the same. In the absorbent article 1 shown in FIG. 6, the rigidity of the first extending portion 43 that separates the inner vicinity of the second extending portion 44 in the width direction and the side accommodating space 81 is compared with that of the absorbent article 1 shown in FIG. Can be made larger. As a result, it is possible to further suppress the excrement from reaching the second extending portion 44 beyond the first extending portion 43, and more reliably suppress the 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 multi-layer structure in which the sheets are stacked in three layers is formed in the entire first extension portion 43, and the rigidity of the first extension portion 43 is made larger than the rigidity of the second extension portion 44. You may. Further, depending on the design of the absorbent article 1, the length of the first extending portion 43 may be 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, the side wall is in a state where the tip portion 412 is arranged outside the base end portion 411 in the width direction (that is, the side wall base portion 41 is tilted outward in the width direction). 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 end portion 412 of the side wall base portion 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 thick to some extent, and suppress the discomfort caused by the thick fixed end portion 48 in the wearer. 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, 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 of the fixed end portion 48. It is preferable that the side wall base 41, the first extension 43, and the second extension 44 are overlapped with the main body 2 in a state where the second extension 44 is spread 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 4 may be used in various absorbent articles other than tape-type disposable diapers (eg, pants-type disposable diapers, auxiliary absorbers, incontinence pads or sanitary napkins).

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 above-described embodiments and configurations in the respective modifications may be appropriately combined as long as they do not conflict with each other.

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 4 Side wall 21 Top sheet 22 Absorption core 23 Back sheet 41 Side wall base 43 1st extension 44 2nd extension 45 1st extension elastic member 46 2nd extension elastic member 48 Fixed end 411 Base end 412 Tip 451 First thread-like elastic element 461 Second thread-like elastic element

Claims

It is an absorbent article
A sheet-like main body extending in the longitudinal direction in which an absorption core is arranged between the back sheet and the top sheet,
A pair of side wall portions provided on the top sheet side in the vicinity of both side portions of the absorption core and extending in the longitudinal direction, and
With
Each side wall
A side wall base portion extending in the longitudinal direction and having a base end portion joined to the main body portion in the central portion in the longitudinal direction and a tip portion not joined to the main body portion.
A first extension portion and a second extension portion extending from the tip end portion of the side wall base portion in the central portion, and a second extension portion.
A first extension portion that erects the side wall base portion at the central portion by being joined to the first extension portion and the second extension portion along the longitudinal direction and contracting in the longitudinal direction. Elastic member and second extension elastic member,
With
In the central portion with the side wall base portion upright, the first extension portion is arranged inside in the width direction perpendicular to the longitudinal direction with respect to the second extension portion.
An absorbent article characterized in that the contraction force of the first extension portion elastic member is smaller than the contraction force of the second extension portion elastic member.

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

The absorbent article according to claim 1 or 2.
An absorbent article characterized in that, in the central portion in a state where the side wall base portion is upright, the first extending portion extends inward in the width direction from the tip end portion of the side wall base portion.

It is an absorbent article
A sheet-like main body extending in the longitudinal direction in which an absorption core is arranged between the back sheet and the top sheet,
A pair of side wall portions provided on the top sheet side in the vicinity of both side portions of the absorption core and extending in the longitudinal direction, and
With
Each side wall
A side wall base portion extending in the longitudinal direction and having a base end portion joined to the main body portion in the central portion in the longitudinal direction and a tip portion not joined to the main body portion.
A first extension portion and a second extension portion extending from the tip end portion of the side wall base portion in the central portion, and a second extension portion.
A first extension portion that erects the side wall base portion at the central portion by being joined to the first extension portion and the second extension portion along the longitudinal direction and contracting in the longitudinal direction. Elastic member and second extension elastic member,
With
In the central portion with the side wall base portion upright, the first extension portion is arranged inside in the width direction perpendicular to the longitudinal direction with respect to the second extension portion, and the first extension portion is , An absorbent article characterized in that it extends inward in the width direction from the tip of the side wall base.

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

The absorbent article according to any one of claims 1 to 5.
Absorption characterized in that the length from the tip end portion of the side wall base portion to the tip end of the first extension portion is larger than the length from the tip end portion of the side wall base portion to the tip end of the second extension portion. Sex goods.

The absorbent article according to any one of claims 1 to 6.
An absorbent article characterized in that the rigidity of the first extension portion is larger than the rigidity of the second extension portion.

The absorbent article according to any one of claims 1 to 7.
The first extension portion and the second extension portion extend from the central portion to both end portions of the side wall portions in the longitudinal direction, and at both end portions of the side wall portions, the side wall base portion is said. The side wall base, the first extension, and the above, with the first extension extending from the tip end to one side in the width direction and the second extension extending to the other side in the width direction. An absorbent article characterized in that the second extending portion is overlapped with the main body portion.