JP7406989B2

JP7406989B2 - absorbent articles

Info

Publication number: JP7406989B2
Application number: JP2019239798A
Authority: JP
Inventors: 翠手島; 夕貴橋野; 悦子工藤; 稔泰吉岡
Original assignee: Unicharm Corp
Current assignee: Unicharm Corp
Priority date: 2019-12-27
Filing date: 2019-12-27
Publication date: 2023-12-28
Anticipated expiration: 2039-12-27
Also published as: CN114901228A; JP2021106817A; WO2021131841A1

Description

本発明は、吸収材料を含む吸収コアと、胴回り域において幅方向に伸長した状態で配置されるウエスト弾性部材とを有する吸収性物品に関する。 The present invention relates to an absorbent article having an absorbent core containing an absorbent material and a waist elastic member arranged in a widthwise extended state in the waist region.

特許文献１には、吸収材料を含む吸収コアと胴回り域において幅方向に伸長した状態で配置されるウエスト弾性部材とを有し、中央低収縮領域と一対のサイド収縮領域とが設けられている吸収性物品が開示されている。中央低収縮領域は、吸収性物品の幅方向の中心を跨いでいる。一対のサイド収縮領域は、幅方向において中央低収縮領域の両外側に隣接する。また、中央低収縮領域の幅方向の収縮力は、サイド収縮領域の幅方向の収縮力よりも低い。背側では臀部により着用者の身体が出っ張るため、背側の中央低収縮領域の最大幅を、腹側の中央低収縮領域の最大幅よりも大きくすることで、背側において着用者の身体が強く締め付けられず、着用者が不快に感じ難い。 Patent Document 1 has an absorbent core containing an absorbent material and a waist elastic member disposed in a state of being stretched in the width direction in the waist region, and is provided with a central low shrinkage region and a pair of side shrinkage regions. An absorbent article is disclosed. The central low shrinkage region straddles the center of the absorbent article in the width direction. The pair of side shrinkage regions are adjacent to both outer sides of the central low shrinkage region in the width direction. Further, the contraction force in the width direction of the central low contraction area is lower than the contraction force in the width direction of the side contraction areas. Since the wearer's body protrudes from the buttocks on the dorsal side, by making the maximum width of the central low-contraction area on the dorsal side larger than the maximum width of the central low-contraction area on the ventral side, the wearer's body protrudes on the dorsal side. It is not tightly tightened and the wearer does not feel uncomfortable.

一方で、幅方向において中央低収縮領域の両外側に隣接するサイド収縮領域の収縮力を相対的に高めることで、胴回り域のフィット性が低下することを抑制している。これにより、吸収性物品が着用者の身体からズレ難くなり、***物が外部に漏れず吸収性物品が***物を保持することができる。上述の吸収性物品では、吸収性物品の機能である***物の保持機能を維持しつつ、吸収性物品の装着性を向上させている。 On the other hand, by relatively increasing the shrinkage force of the side shrinkage regions adjacent to both outer sides of the central low shrinkage region in the width direction, deterioration of fit in the waist region is suppressed. This makes it difficult for the absorbent article to shift from the wearer's body, and allows the absorbent article to retain excrement without leaking to the outside. In the above-mentioned absorbent article, the wearability of the absorbent article is improved while maintaining the function of retaining excreta, which is the function of the absorbent article.

特開２０１７－５３７７２６号公報JP2017-537726A

上述の吸収性物品では、腹側の中央低収縮領域の最大幅に対して背側の中央低収縮領域の最大幅を相対的に調整することで、吸収性物品の装着性の向上を図っていた。このため、着用者の身体の一方側（腹側又は背側）のみに着目して、***物の保持機能と着用者の装着感との両立が図られていなかった。 In the above-mentioned absorbent article, the wearability of the absorbent article is improved by adjusting the maximum width of the central low-contraction region on the dorsal side relative to the maximum width of the central low-contraction region on the ventral side. Ta. For this reason, by focusing only on one side (ventral side or dorsal side) of the wearer's body, it has not been possible to achieve both the function of retaining excrement and the wearer's comfort.

そこで、吸収材料を含む吸収コアと、胴回り域において幅方向に伸長した状態で配置されるウエスト弾性部材と、を有し、中央低収縮領域と一対のサイド収縮領域とが設けられる吸収性物品であって、***物の保持機能と着用者の装着感とを両立できる吸収性物品を提供することを目的とする。 Therefore, an absorbent article is provided that has an absorbent core containing an absorbent material, a waist elastic member disposed in a state of being stretched in the width direction in the waist region, and is provided with a central low shrinkage region and a pair of side shrinkage regions. Therefore, it is an object of the present invention to provide an absorbent article that can achieve both the function of retaining excrement and the comfort of the wearer.

一態様に係る吸収性物品は、前後方向、及び前記前後方向に直交する幅方向と、厚さ方向と、第１胴回り域と第２胴回り域により構成される胴回り域と、前記第１胴回り域及び前記第２胴回り域とに前記前後方向で挟まれる股下域と、吸収材料を含む吸収コアと、前記第１胴回り域において前記幅方向に伸長した状態で配置されるウエスト弾性部材と、を有する。前記第１胴回り域において前記吸収性物品の前記幅方向の中心である幅中心を跨ぐ中央低収縮領域と、前記幅方向において前記中央低収縮領域の両外側に隣接する一対のサイド収縮領域と、が設けられる。前記中央低収縮領域の前記幅方向の収縮力は、前記サイド収縮領域の前記幅方向の収縮力よりも低い。前記中央低収縮領域は、最小幅と、前記最小幅よりも前記前後方向の外側に位置する最大幅と、を有する。前記前後方向において、前記中央低収縮領域の内端縁は、前記吸収コアの外端縁よりも外側に位置する。 The absorbent article according to one embodiment includes: a front-rear direction; a width direction perpendicular to the front-rear direction; a thickness direction; a waist region including a first waist region and a second waist region; and the first waist region. and a crotch region sandwiched between the second waist region in the front-rear direction, an absorbent core containing an absorbent material, and a waist elastic member disposed in the first waist region in a stretched state in the width direction. . a central low shrinkage region that straddles the width center that is the center of the absorbent article in the width direction in the first waist region; and a pair of side shrinkage regions that are adjacent to both outer sides of the central low shrinkage region in the width direction; is provided. The contraction force in the width direction of the central low contraction area is lower than the contraction force in the width direction of the side contraction areas. The central low shrinkage region has a minimum width and a maximum width located outside the minimum width in the front-rear direction. In the front-rear direction, an inner edge of the central low shrinkage region is located outside an outer edge of the absorbent core.

図１は、本実施形態に係る吸収性物品の模式正面図である。FIG. 1 is a schematic front view of an absorbent article according to this embodiment. 図２は、本実施形態に係る吸収性物品の模式平面図である。FIG. 2 is a schematic plan view of the absorbent article according to this embodiment. 図３Ａは、図２におけるＦ３Ａ－Ｆ３Ａ線に沿った吸収性物品の模式断面図であり、図３Ｂは、図２におけるＦ３Ｂ－Ｆ３Ｂ線に沿った吸収性物品の模式断面図である。3A is a schematic cross-sectional view of the absorbent article along line F3A-F3A in FIG. 2, and FIG. 3B is a schematic cross-sectional view of the absorbent article along line F3B-F3B in FIG. 2. 図４は、ウエスト弾性部材を説明するための吸収性物品の模式平面図である。FIG. 4 is a schematic plan view of the absorbent article for explaining the waist elastic member. 図５は、低収縮領域を説明するための吸収性物品の模式平面図である。FIG. 5 is a schematic plan view of the absorbent article for explaining the low shrinkage region. 図６は、着用状態の吸収性物品を説明するための吸収性物品正面図である。FIG. 6 is a front view of the absorbent article for explaining the absorbent article in a worn state. 図７は、着用状態の吸収性物品を説明するための吸収性物品の側面図である。FIG. 7 is a side view of the absorbent article for explaining the absorbent article in a worn state. 図８Ａは、図６におけるＦ８Ａ－Ｆ８Ａ線に沿った模式断面図であり、図８Ｂは、図６におけるＦ８Ｂ－Ｆ８Ｂ線に沿った模式断面図であり、図８Ｃは、図８Ｂの模式的拡大図である。8A is a schematic cross-sectional view taken along line F8A-F8A in FIG. 6, FIG. 8B is a schematic cross-sectional view taken along line F8B-F8B in FIG. 6, and FIG. 8C is a schematic enlarged view of FIG. 8B. It is a diagram.

（１）実施形態の概要
一態様に係る吸収性物品は、前後方向、及び前記前後方向に直交する幅方向と、厚さ方向と、第１胴回り域と第２胴回り域により構成される胴回り域と、前記第１胴回り域及び前記第２胴回り域とに前記前後方向で挟まれる股下域と、吸収材料を含む吸収コアと、前記第１胴回り域において前記幅方向に伸長した状態で配置されるウエスト弾性部材と、を有する。前記第１胴回り域において前記吸収性物品の前記幅方向の中心である幅中心を跨ぐ中央低収縮領域と、前記幅方向において前記中央低収縮領域の両外側に隣接する一対のサイド収縮領域と、が設けられる。前記中央低収縮領域の前記幅方向の収縮力は、前記サイド収縮領域の前記幅方向の収縮力よりも低い。前記中央低収縮領域は、最小幅と、前記最小幅よりも前記前後方向の外側に位置する最大幅と、を有する。前記前後方向において、前記中央低収縮領域の内端縁は、前記吸収コアの外端縁よりも外側に位置する。本態様によれば、***物の保持機能と着用者の装着感とを両立できる。 (1) Overview of Embodiments An absorbent article according to one aspect includes a waist region including a front-back direction, a width direction perpendicular to the front-back direction, a thickness direction, a first waist region, and a second waist region. a crotch region sandwiched between the first waist region and the second waist region in the front-rear direction; an absorbent core containing an absorbent material; and an absorbent core that is arranged in the first waist region in a state extending in the width direction. A waist elastic member. a central low shrinkage region that straddles the width center that is the center of the absorbent article in the width direction in the first waist region; and a pair of side shrinkage regions that are adjacent to both outer sides of the central low shrinkage region in the width direction; is provided. The contraction force in the width direction of the central low contraction area is lower than the contraction force in the width direction of the side contraction areas. The central low shrinkage region has a minimum width and a maximum width located outside the minimum width in the front-rear direction. In the front-rear direction, an inner edge of the central low shrinkage region is located outside an outer edge of the absorbent core. According to this aspect, it is possible to achieve both the function of retaining excrement and the comfort of the wearer.

好ましい一態様によれば、前記第１胴回り域は、着用者の腹側に配置される。腹側の腸骨稜の高さは、背側の腸骨稜の高さよりも低いため、腹側では、背側と比較して、内臓及び脂肪等が腸骨に覆われている領域が小さい。このため、腹部の方が、背部に比べると身体の外側へ出っ張り易い。そこで、着用者の腹部に中央低収縮領域を配置することで、着用者の腹部が強く締め付けられる領域を低減して、装着感を向上させることができる。 According to one preferred embodiment, the first waist region is located on the ventral side of the wearer. The height of the iliac crest on the ventral side is lower than the height of the iliac crest on the dorsal side, so the area where internal organs and fat are covered by the ilium is smaller on the ventral side than on the dorsal side. . For this reason, the abdomen tends to protrude outward from the body more easily than the back. Therefore, by arranging the central low-contraction region on the wearer's abdomen, it is possible to reduce the region where the wearer's abdomen is strongly tightened and improve the wearing comfort.

好ましい一態様によれば、前記中央低収縮領域の幅は、前記前後方向の外側に向かうにつれて広がる。胴回り域において腸骨稜の高さは中央部から側部に向かうほど高くなるため、中央部では、前後方向の外側（ウエスト開口部側）に向かうほど、腸骨に覆われている領域が少なくなる。このため、前後方向の外側に向かうほど、着用者の身体が出っ張り易くなり、着用者の胴回りの周長が長くなる。そこで、中央低収縮領域の幅が前後方向の外側に向かうにつれて広がることで、着用者の胴回りの周長に応じて、中央低収縮領域の幅が広くなり、着用者の身体を強く締め付けない領域が増える。その結果、装着感を向上させることができる。 According to a preferred aspect, the width of the central low shrinkage region increases toward the outside in the front-rear direction. In the waist area, the height of the iliac crest increases from the center to the sides, so in the center, the area covered by the iliac bones decreases as you move outward in the front-rear direction (towards the waist opening). Become. For this reason, the wearer's body tends to protrude more outward in the front-rear direction, and the circumference of the wearer's torso becomes longer. Therefore, by widening the width of the central low-contraction area toward the outside in the front-rear direction, the width of the central low-contraction area increases according to the circumference of the wearer's torso, and the area does not tightly tighten the wearer's body. increases. As a result, the wearing comfort can be improved.

好ましい一態様によれば、前記中央低収縮領域において前記幅方向における収縮力が０より大きく、前記吸収コアを有し、かつ前記股下域から前記第１胴回り域へ延びる吸収性本体を有し、前記吸収性本体は、前記吸収コアの前記前後方向における外端縁よりも前記前後方向の外側にまで延びる延出部を有し、前記中央低収縮領域は、前記延出部と前記厚さ方向に重なる。延出部が弱い力で幅方向に縮められることで、延出部と着用者の身体との間に小さな隙間を発生させることができる。その結果、隙間を小さくすることで***物の漏れを抑制しつつも、第１胴回り域において延出部と重なることで蒸れ易くなる領域の通気性を向上させることができる。着用者の蒸れによる不快感を低減させて、装着感を向上させることができる。 According to a preferred aspect, the central low shrinkage region has an absorbent main body having a shrinkage force in the width direction greater than 0, having the absorbent core, and extending from the crotch region to the first waist region; The absorbent main body has an extension portion that extends further outward in the front-rear direction than the outer edge of the absorbent core in the front-rear direction, and the central low shrinkage region is located between the extension portion and the thickness direction. overlaps with By contracting the extending portion in the width direction with a weak force, a small gap can be generated between the extending portion and the wearer's body. As a result, while reducing the gap to suppress leakage of excrement, it is possible to improve breathability in the region of the first waist region that overlaps with the extension and tends to become stuffy. It is possible to reduce the wearer's discomfort due to stuffiness and improve the wearing comfort.

好ましい一態様によれば、前記吸収性物品は、前記吸収コアを有し、かつ前記股下域から前記第１胴回り域へ延びる吸収性本体を有し、前記吸収性本体は、前記吸収コアの前記前後方向における外端縁よりも前記前後方向の外側にまで延びる延出部を有し、前記中央低収縮領域は、前記延出部の外端縁よりも前記前後方向の外側の領域と前記厚さ方向に重なる。延出部の外端縁よりも前後方向の外側の領域（以下、外側領域）は、延出部と厚さ方向に重なる領域（以下、延出領域）よりも、腹部及び背部が身体の外側へ向かってより出っ張っている。外側領域の厚さは、延出部がない分だけ、延出領域の厚さよりも薄いため、外側領域の着圧は、延出領域の着圧よりも低くなる。加えて、外側領域は、収縮力の低い中央低収縮領域と厚さ方向に重なっているため、延出領域よりも腹部及び背部が出っ張っている部分に対して、着圧が低くかつ強く締め付けない外側領域を配置することができ、着用者の装着感をさらに向上できる。 According to a preferred aspect, the absorbent article has the absorbent core and an absorbent main body extending from the crotch region to the first waist region, and the absorbent main body has the absorbent core. The central low shrinkage region has an extending portion extending further outward in the longitudinal direction than the outer edge in the longitudinal direction, and the central low shrinkage region has a thickness that is greater than the outer edge of the extending portion in the longitudinal direction. overlap in the horizontal direction. The region outside the outer edge of the extension in the front-back direction (hereinafter referred to as the "outer region") is located at a position where the abdomen and back are more outside the body than the region overlapping the extension in the thickness direction (hereinafter referred to as the "extension region"). It is more protruding towards. Since the thickness of the outer region is thinner than the thickness of the extension region due to the absence of the extension portion, the bonding pressure of the outer region is lower than that of the extension region. In addition, since the outer region overlaps the central low-contraction region, which has a low contraction force, in the thickness direction, the pressure applied to the abdomen and back protrusions is lower than that of the extension region, and it does not tighten as strongly. The outer region can be arranged to further improve the wearer's comfort.

好ましい一態様によれば、前記幅方向において、前記最大幅の位置における前記中央低収縮領域の側縁である最大側縁は、前記吸収コアの側縁よりも外側に配置される。これにより、少なくとも一部のサイド収縮領域は、吸収コアの側縁よりも幅方向の内側に配置されないため、吸収コアが幅方向の内側へ引っ張られ難くすることができる。その結果、吸収コアが幅方向に縮み難くなるため、吸収コアの吸収面積を確保することができ、***物が漏れることを抑制することができる。 According to a preferred aspect, in the width direction, a maximum side edge that is a side edge of the central low shrinkage region at the maximum width position is arranged outside a side edge of the absorbent core. Thereby, at least some of the side contraction regions are not arranged on the inner side in the width direction than the side edges of the absorbent core, so that the absorbent core can be made difficult to be pulled inward in the width direction. As a result, since the absorbent core becomes difficult to shrink in the width direction, the absorbent area of the absorbent core can be secured, and leakage of excrement can be suppressed.

好ましい一態様によれば、前記幅方向において、前記最小幅の位置における前記中央低収縮領域の側縁である最小側縁は、前記吸収コアの側縁よりも内側に位置する。サイド収縮領域の収縮によって、吸収コアの側縁が着用者の身体側へ近づく。吸収コアの側縁付近において吸収性物品と着用者の身体との間の隙間が低減し、***物の漏れを抑制できる。 According to a preferred aspect, in the width direction, a minimum side edge that is a side edge of the central low shrinkage region at the position of the minimum width is located inside a side edge of the absorbent core. The contraction of the side contraction regions brings the side edges of the absorbent core closer to the wearer's body. The gap between the absorbent article and the wearer's body is reduced near the side edges of the absorbent core, and leakage of excrement can be suppressed.

好ましい一態様によれば、前記吸収性物品は、前記吸収コアを有し、前記股下域から前記第１胴回り域へ延びる吸収性本体を有し、前記幅方向において、前記最大幅の位置における前記中央低収縮領域の側縁である最大側縁は、前記吸収性本体の側縁よりも外側に位置する。これにより、少なくとも一部のサイド収縮領域は、吸収性本体の内側縁よりも幅方向の内側に配置されないため、吸収性本体が幅方向の内側へ引っ張られ難くすることができる。吸収性本体が、幅方向に縮み難くなり、広い状態を維持し易くなる。その結果、***物を保持する面積を確保することができる。 According to a preferred aspect, the absorbent article has the absorbent core and an absorbent main body extending from the crotch region to the first waist region, and the absorbent article has the absorbent core at the maximum width position in the width direction. The largest side edge, which is the side edge of the central low shrinkage region, is located outside the side edge of the absorbent main body. As a result, at least some of the side contraction regions are not arranged on the inner side in the width direction than the inner edge of the absorbent main body, so that the absorbent main body can be made difficult to be pulled inward in the width direction. The absorbent main body is less likely to shrink in the width direction, making it easier to maintain a wide state. As a result, an area for holding excrement can be secured.

好ましい一態様によれば、前記ウエスト弾性部材は、前記中央低収縮領域よりも前記前後方向の内側において、前記第１胴回り域の一方の側端部から他方の側端部まで連続的に延びる連続弾性部材を有する。連続弾性部材が着用者の腸骨付近に位置するように、着用者が吸収性物品を着用することで、第１胴回り域を幅方向に連続的に密着させることができる。ここで、腸骨よりも内側に存在する内臓及び脂肪等は圧迫され難いため、腸骨付近では、着用者の身体に第１胴回り域を密着させても着用者が不快に感じ難い。一方で、連続弾性部材が着用者の腸骨付近に位置するように、着用者が吸収性物品を着用することで、中央低収縮領域は、腸骨よりも上側の領域、すなわち、胴回りの周長が長くなる領域に配置される。従って、胴回りの周長が長くて装着感が悪化し易い部分に対して、着用者の身体を強く締め付けない領域を長く配置することができ、着用者の装着感を向上できる。 According to a preferred aspect, the waist elastic member is a continuous member that extends continuously from one side end to the other side end of the first waist region on the inside of the central low shrinkage region in the front-rear direction. It has an elastic member. By having the wearer wear the absorbent article such that the continuous elastic member is located near the wearer's ilium, the first waist region can be brought into continuous contact with the absorbent article in the width direction. Here, since the internal organs, fat, etc. that exist inside the ilium are not easily compressed, the wearer is unlikely to feel uncomfortable even if the first waist region is brought into close contact with the wearer's body near the ilium. On the other hand, when the wearer wears the absorbent article so that the continuous elastic member is located near the wearer's ilium, the central low-contraction region is located above the ilium, that is, around the waist. Placed in the area where the length increases. Therefore, in contrast to a portion where the circumference of the torso is long and the wearing comfort is likely to deteriorate, a long region that does not strongly tighten the wearer's body can be provided, and the wearing comfort for the wearer can be improved.

好ましい一態様によれば、前記連続弾性部材の収縮力は、他のウエスト弾性部材の収縮力よりも大きい。連続弾性部材が着用者の腸骨付近に位置するように着用者が吸収性物品を着用した場合、腸骨よりも内側に存在する内臓及び脂肪等は圧迫され難い。従って、内臓及び脂肪等は圧迫されずに着用者が不快に感じ難い腸骨付近で、収縮力が大きい連続弾性部材によって、着用者の身体に第１胴回り域をしっかりと密着させることができる。 According to a preferred embodiment, the contraction force of the continuous elastic member is greater than the contraction force of other waist elastic members. When a wearer wears an absorbent article such that the continuous elastic member is located near the wearer's ilium, internal organs, fat, etc. located inside the ilium are not easily compressed. Therefore, the continuous elastic member having a large contractile force can firmly bring the first waist region into close contact with the wearer's body in the vicinity of the iliac bone where the internal organs, fat, etc. are not compressed and the wearer does not feel uncomfortable.

好ましい一態様によれば、前記第１胴回り域において、前記連続弾性部材よりも前記前後方向の内側で前記幅中心を跨ぐ股側低収縮領域と、前記連続弾性部材よりも前記前後方向の内側で、前記幅方向において前記股側低収縮領域の両外側に隣接する一対の股側サイド収縮領域と、が設けられており、前記股側低収縮領域の前記幅方向の収縮力は、前記股側サイド収縮領域の前記幅方向の収縮力よりも低く、前記股側低収縮領域は、前記吸収コアと前記厚さ方向に重なる。収縮力が低い股側低収縮領域と厚さ方向に重なっている吸収コアの部分は、幅方向に縮み難いため、吸収コアの吸収面積を確保することができ、***物の漏れを抑制できる。 According to a preferred aspect, in the first waist region, a crotch-side low shrinkage region straddling the width center on the inner side of the continuous elastic member in the front-rear direction; , a pair of crotch side side contraction areas adjacent to both outside sides of the crotch side low contraction area in the width direction, and the contraction force of the crotch side low contraction area in the width direction is The contraction force in the width direction of the side contraction areas is lower, and the crotch side low contraction area overlaps the absorbent core in the thickness direction. The portion of the absorbent core that overlaps in the thickness direction with the crotch side low shrinkage region where the shrinkage force is low is difficult to shrink in the width direction, so the absorption area of the absorbent core can be secured and leakage of excrement can be suppressed.

好ましい一態様によれば、前記吸収コアの側縁は、前記股側サイド収縮領域と前記厚さ方向に重なる。これにより、股側サイド収縮領域の収縮によって、吸収コアの側縁には幅方向の外側へ向かう力が働き、吸収コアが幅方向の外側へ引っ張られ易くなる。その結果、吸収コアの側縁が幅方向の外側へ引っ張られて、吸収コアが幅方向の外側へ引き延ばされる。吸収コアの吸収面積を確保することができ、***物が漏れることを抑制することができる。 According to a preferred aspect, the side edge of the absorbent core overlaps the crotch-side side contraction region in the thickness direction. Accordingly, due to the contraction of the crotch-side side contraction region, a force directed outward in the width direction acts on the side edges of the absorbent core, making it easier for the absorbent core to be pulled outward in the width direction. As a result, the side edges of the absorbent core are pulled outward in the width direction, and the absorbent core is stretched outward in the width direction. The absorption area of the absorbent core can be secured, and leakage of excrement can be suppressed.

好ましい一態様によれば、前記吸収コアは、前記股下域において、前記前後方向に延びるスリットを有し、前記幅方向において、前記股側サイド収縮領域の内側縁は、前記スリットよりも外側に位置する。吸収コアのスリットは、周囲よりも剛性が低いため、幅方向に潰され易い。ここで、股側サイド収縮領域の内側縁は、吸収コアのスリットよりも幅方向の外側に位置する。従って、股側低収縮領域よりも収縮力が強い股側サイド収縮領域が幅方向に収縮しても、スリットを幅方向に収縮させる力がスリットには働かない。これにより、スリットが幅方向に潰され難くなる。スリットが幅方向に潰されない場合には、スリットにより幅方向に剛性差が発生するため、スリットを基点として吸収コアを幅方向に曲げ易くすることができる。吸収コアが幅方向に曲がることで、股下域に吸収コアが収納され易くなるため、装着感を向上できる。 According to a preferred aspect, the absorbent core has a slit extending in the front-rear direction in the crotch region, and in the width direction, an inner edge of the crotch-side side contraction region is located outside of the slit. do. The slit of the absorbent core has lower rigidity than the surrounding area, so it is easily crushed in the width direction. Here, the inner edge of the crotch-side side contraction area is located outside the slit of the absorbent core in the width direction. Therefore, even if the crotch side side contraction area, which has a stronger contraction force than the crotch side low contraction area, contracts in the width direction, the force that causes the slit to contract in the width direction does not act on the slit. This makes it difficult for the slit to be crushed in the width direction. If the slits are not crushed in the width direction, the slits cause a difference in rigidity in the width direction, so that the absorbent core can be easily bent in the width direction using the slits as a base point. By bending the absorbent core in the width direction, it becomes easier to store the absorbent core in the crotch area, thereby improving the wearing comfort.

好ましい一態様によれば、前記第１胴回り域は、着用者の腹側に配置されており、前記中央低収縮領域の幅が、前記前後方向の外側に向かうにつれて広がっており、前記最小幅の位置における前記中央低収縮領域の側縁である最小側縁から前記最小幅の位置における前記中央低収縮領域の側縁である最大側縁までの前記幅方向の長さに対する前記前後方向の長さの傾きは、前記股側低収縮領域の前記前後方向において最も外側に位置する側縁から前記中央低収縮領域の前記最小側縁までの前記幅方向の長さに対する前記前後方向の長さの傾きよりも小さい。身長が低い低月齢の幼児では、大人と比較すると、前後方向における腹側の胴回りの周長の変化が大きい。従って、腸骨よりも前後方向の外側において腸骨に近い距離から腹側の胴回りの周長が大きくなり始める。そこで、中央低収縮領域の側縁の傾き（最小側縁から最大側縁までの傾き）を小さくすることで、低月齢の幼児の胴回りの周長に応じて、中央低収縮領域の幅を早めに広くすることができる。これにより、低月齢の幼児の胴回りの周長に応じて、身体を強く締め付けない領域を配置することができるため、低月齢の幼児の装着感を向上できる。 According to a preferred aspect, the first waist region is disposed on the ventral side of the wearer, and the width of the central low contraction region increases toward the outside in the front-back direction, and The length in the front-rear direction relative to the length in the width direction from the smallest side edge that is the side edge of the central low shrinkage region at the position to the largest side edge that is the side edge of the central low shrinkage region at the minimum width position The slope is the slope of the length in the front-back direction with respect to the length in the width direction from the outermost side edge of the crotch side low-shrinkage region in the front-back direction to the minimum side edge of the central low-shrinkage region. smaller than In young infants who are short in stature, the circumference of their ventral torso changes significantly in the anteroposterior direction compared to adults. Therefore, the circumference of the ventral trunk begins to increase from a distance closer to the ilium on the outer side of the ilium in the anteroposterior direction. Therefore, by reducing the slope of the side edges of the central low-contraction area (the slope from the minimum side edge to the maximum side edge), the width of the central low-contraction area can be made faster according to the circumference of the infant's torso. can be widened to Thereby, it is possible to arrange a region that does not strongly tighten the body according to the circumference of the torso of a young infant, so that the wearing comfort of the young infant can be improved.

（２）吸収性物品の全体概略構成
実施形態に係る吸収性物品１について、図１から図８を用いて説明する。吸収性物品１は、例えば、パンツ型の使い捨ておむつ、テープ型の使い捨ておむつ、又はショーツ型の生理用ナプキンなどである。実施形態の吸収性物品１は、パンツ型の使い捨ておむつである。なお、図面は模式的なものであり、各寸法の比率等は現実のものとは異なる場合があることに留意すべきである。模式断面図において、説明の便宜上、各部材が厚さ方向Ｔにおいて離間していることがあるが、実際の製品においては厚さ方向Ｔに接している。 (2) Overall schematic configuration of absorbent article An absorbent article 1 according to an embodiment will be described using FIGS. 1 to 8. The absorbent article 1 is, for example, a pants-type disposable diaper, a tape-type disposable diaper, or a shorts-type sanitary napkin. The absorbent article 1 of the embodiment is a pants-type disposable diaper. It should be noted that the drawings are schematic and the ratio of each dimension may differ from the actual one. In the schematic cross-sectional view, each member may be spaced apart in the thickness direction T for convenience of explanation, but in an actual product, each member is in contact with the thickness direction T.

図１に示すように、吸収性物品１は、前後方向Ｌ、及び前後方向Ｌに直行する幅方向Ｗを有する。前後方向Ｌは、身体前側と身体後側とに延びる方向によって規定される。言い換えると、前後方向Ｌは、展開された吸収性物品１において前後に延びる方向である。また、吸収性物品１は、前後方向Ｌと幅方向Ｗの両方の直交する厚さ方向Ｔを有する。厚さ方向Ｔは、着用者側に向かう肌面側Ｔ１と、肌面側と反対側の非肌面側Ｔ２と、に延びる。 As shown in FIG. 1, the absorbent article 1 has a front-back direction L and a width direction W perpendicular to the front-back direction L. As shown in FIG. The longitudinal direction L is defined by a direction extending toward the front side of the body and the rear side of the body. In other words, the front-back direction L is a direction extending back and forth in the developed absorbent article 1. Further, the absorbent article 1 has a thickness direction T that is perpendicular to both the front-rear direction L and the width direction W. The thickness direction T extends to a skin side T1 facing the wearer and a non-skin side T2 opposite to the skin side.

吸収性物品１は、第１胴回り域と第２胴回り域とにより構成される胴回り域と、第１胴回り及び第２胴回り域に前後方向で挟まれる股下域Ｓ３と、を有する。本実施形態では、第１胴回り域は、着用者の腹側に配置される前胴回り域Ｓ１である。前胴回り域Ｓ１は、着用者の前胴回り（腹部）に対向する領域である。第２胴回り域は、着用者の背側に配置される後胴回り域Ｓ２である。後胴回り域Ｓ２は、着用者の後胴回り（背部）に対向する領域である。股下域Ｓ３は、着用者の股下に位置し、前胴回り域Ｓ１と後胴回り域Ｓ２との間に配置された領域である。 The absorbent article 1 has a waist region constituted by a first waist region and a second waist region, and a crotch region S3 sandwiched between the first waist region and the second waist region in the front-rear direction. In this embodiment, the first waist region is a front waist region S1 located on the ventral side of the wearer. The front waistline region S1 is a region facing the front waistline (abdomen) of the wearer. The second waistline region is a rear waistline region S2 located on the back side of the wearer. The rear waistline region S2 is a region facing the rear waistline (back) of the wearer. The crotch region S3 is a region located in the crotch of the wearer and arranged between the front waist region S1 and the back waist region S2.

吸収性物品１は、吸収性本体２０及び外装体５０を有してよい。吸収性本体２０は、外装体５０とは別体として構成されていてよい。吸収性本体２０は、少なくとも股下域Ｓ３に配置されている。吸収性本体２０は、股下域Ｓ３から前胴回り域Ｓ１へ前後方向Ｌに延びてよく、股下域Ｓ３から後胴回り域Ｓ２へ前後方向Ｌに延びてよい。吸収性本体２０は、吸収コア３１の前後方向Ｌにおける外端縁よりも前後方向Ｌの外側にまで延びる延出部２４を有してよい。吸収性本体２０は、前胴回り域Ｓ１及び後胴回り域Ｓ２において、外装体５０と厚さ方向Ｔに重なってよい。外装体５０は、少なくとも胴回り域に配置される。外装体５０は、前胴回り域Ｓ１に配置される前外装体５０Ａと、後胴回り域Ｓ２に配置される後外装体５０Ｂとにより構成されてよい。 The absorbent article 1 may include an absorbent main body 20 and an exterior body 50. The absorbent main body 20 may be configured separately from the exterior body 50. The absorbent main body 20 is arranged at least in the crotch region S3. The absorbent main body 20 may extend in the front-rear direction L from the crotch region S3 to the front waist region S1, and may extend in the front-rear direction L from the crotch region S3 to the rear waist region S2. The absorbent main body 20 may have an extending portion 24 that extends further outward in the front-rear direction L than the outer edge of the absorbent core 31 in the front-rear direction L. The absorbent main body 20 may overlap the exterior body 50 in the thickness direction T in the front waist region S1 and the back waist region S2. The exterior body 50 is arranged at least in the waist region. The exterior body 50 may include a front exterior body 50A disposed in the front waist region S1 and a rear exterior body 50B disposed in the rear waist region S2.

図１に示すように、吸収性物品１は、幅方向Ｗにおける前胴回り域Ｓ１に配置される前外装体５０Ａの外側部と、幅方向Ｗにおける後外装体５０Ｂの外側部を接合するサイド接合部１６を有してよい。サイド接合部１６は、前外装体５０Ａの外側部と、後外装体５０Ｂの外側部とを互いに係止した部分によって規定される。サイド接合部１６は、前外装体５０Ａ及び後外装体５０Ｂのそれぞれにおいて、前後方向Ｌに沿って延びていてよい。サイド接合部１６が形成された状態で、吸収性物品１には、着用者の胴が通されるウエスト開口部１７と、着用者の脚がそれぞれ挿入される一対の脚回り開口部１８と、が形成される。ウエスト開口部１７は、前胴回り域Ｓ１の前端縁Ｓ１Ｆと、後胴回り域Ｓ２の後端縁Ｓ２Ｒとによって規定されていてよい。 As shown in FIG. 1, the absorbent article 1 includes a side joint that joins the outer side of the front outer body 50A disposed in the front waist region S1 in the width direction W and the outer side of the rear outer body 50B in the width direction W. 16. The side joint portion 16 is defined by a portion where the outer side of the front exterior body 50A and the outer side of the rear exterior body 50B are locked to each other. The side joint portion 16 may extend along the front-rear direction L in each of the front exterior body 50A and the rear exterior body 50B. With the side joints 16 formed, the absorbent article 1 includes a waist opening 17 through which the wearer's torso is passed, and a pair of leg openings 18 through which the wearer's legs are respectively inserted. is formed. The waist opening 17 may be defined by the front edge S1F of the front waist region S1 and the rear edge S2R of the rear waist region S2.

パンツ型の吸収性物品１においては、股下域Ｓ３は、前後方向Ｌにおけるサイド接合部１６の内端縁により規定されてよい。前胴回り域Ｓ１と股下域Ｓ３との境界は、前胴回り域Ｓ１におけるサイド接合部１６の後端縁１６Ｒによって規定されてよい。後胴回り域Ｓ２と股下域Ｓ３との境界は、後胴回り域Ｓ２におけるサイド接合部１６の前端縁１６Ｆによって規定されてよい。なお、股下域Ｓ３は、脚回り開口部１８が設けられた領域により規定されてよい。脚回り開口部１８は、吸収性物品１の外側縁から幅方向Ｗの内側に凹む部分である。前胴回り域Ｓ１と股下域Ｓ３との境界は、脚回り開口部１８の前端縁によって規定されてよい。後胴回り域Ｓ２と股下域Ｓ３との境界は、脚回り開口部１８の後端縁によって規定されてよい。 In the pants-shaped absorbent article 1, the crotch region S3 may be defined by the inner edge of the side joint portion 16 in the front-rear direction L. The boundary between the front waist region S1 and the crotch region S3 may be defined by the rear edge 16R of the side joint portion 16 in the front waist region S1. The boundary between the back waist region S2 and the crotch region S3 may be defined by the front edge 16F of the side joint portion 16 in the back waist region S2. Note that the crotch area S3 may be defined by the area in which the leg opening 18 is provided. The leg opening 18 is a portion recessed inward in the width direction W from the outer edge of the absorbent article 1. The boundary between the front waist area S1 and the crotch area S3 may be defined by the front edge of the leg opening 18. The boundary between the rear waist region S2 and the crotch region S3 may be defined by the rear end edge of the leg opening 18.

なお、本明細書における外側部とは、幅方向Ｗにおける外縁を含む幅方向Ｗに一定の範囲を占める部分であり、外側縁とは、幅方向Ｗにおける外縁である。本明細書における内側部とは、幅方向Ｗにおける内縁を含む幅方向Ｗに一定の範囲を占める部分であり、内側縁とは、幅方向Ｗにおける内縁である。また、本明細書における前端部及び後端部は、前後方向Ｌにおける縁を含む前後方向Ｌに一定の範囲を占める部分であり、前端縁及び後端縁は、前後方向Ｌにおける縁である。外端部は、前端部及び後端部を含んでおり、外端縁は、前端縁及び後端縁を含んでいる。 Note that the outer side portion in this specification is a portion that occupies a certain range in the width direction W including the outer edge in the width direction W, and the outer edge is the outer edge in the width direction W. In this specification, the inner part is a part occupying a certain range in the width direction W including the inner edge in the width direction W, and the inner edge is the inner edge in the width direction W. Further, the front end portion and the rear end portion in this specification are parts occupying a certain range in the front-back direction L including the edge in the front-back direction L, and the front end edge and the rear end edge are edges in the front-back direction L. The outer edge includes a front edge and a rear edge, and the outer edge includes a front edge and a rear edge.

吸収性本体２０は、吸収体３０、表面シート４１、裏面シート４２を有してよい。吸収体３０は、吸収材料を含む吸収コア３１を少なくとも有する。吸収コア３１（吸収材料）は、例えば、パルプ及び高吸収性ポリマーの少なくとも一方により構成されてよい。吸収体３０は、吸収コア３１を覆うコアラップ３２を有してよい。コアラップ３２は、吸収コア３１に当接し、吸収コア３１の厚さ方向Ｔの一方を少なくとも覆う。コアラップ３２は、厚さ方向Ｔにおいて吸収コア３１を挟んでよい。コアラップ３２は、吸収コア３１の側方で折り返されることによって吸収コア３１を包んでよい。コアラップ３２は、例えば、ティッシュ、不織布等によって構成されてよい。また、吸収コア３１は、股下域Ｓ３において、前後方向Ｌに延びるスリット３５を有してよい。スリット３５は、吸収コア３１の幅方向Ｗの中心である幅中心ＷＣよりも幅方向Ｗの外側に一対配置されてよい。表面シート４１は、吸収体３０よりも肌面側Ｔ１に位置する。表面シート４１は、着用者の肌に対向する。表面シート４１は、液透過性を有していればよく、例えば、不織布によって構成されていてよい。裏面シート４２は、吸収体３０よりも非肌面側Ｔ２に位置する。裏面シート４２は、液不透過性を有していればよく、例えば、フィルムによって構成されていてよい。 The absorbent main body 20 may include an absorbent body 30, a top sheet 41, and a back sheet 42. The absorbent body 30 has at least an absorbent core 31 containing an absorbent material. The absorbent core 31 (absorbent material) may be made of, for example, at least one of pulp and superabsorbent polymer. The absorbent core 30 may include a core wrap 32 that covers the absorbent core 31. The core wrap 32 contacts the absorbent core 31 and covers at least one side of the absorbent core 31 in the thickness direction T. The core wrap 32 may sandwich the absorbent core 31 in the thickness direction T. The core wrap 32 may wrap the absorbent core 31 by being folded back on the side of the absorbent core 31. The core wrap 32 may be made of tissue, nonwoven fabric, or the like, for example. Further, the absorbent core 31 may have a slit 35 extending in the front-rear direction L in the crotch region S3. A pair of slits 35 may be arranged on the outside in the width direction W from the width center WC, which is the center of the absorbent core 31 in the width direction W. The top sheet 41 is located closer to the skin surface T1 than the absorber 30. The top sheet 41 faces the wearer's skin. The top sheet 41 only needs to have liquid permeability, and may be made of, for example, a nonwoven fabric. The back sheet 42 is located closer to the non-skin side T2 than the absorber 30. The back sheet 42 only needs to be liquid-impermeable, and may be made of a film, for example.

外装体５０（前外装体５０Ａ及び後外装体５０Ｂ）は、吸収性本体２０よりも非肌面側Ｔ２に配置される。外装体５０は、複数のシート部材により構成されてよい。なお、外装体５０は、吸収性本体２０よりも肌面側Ｔ１に配置されるシート部材を有していてもよい。また、外装体５０は、ウエスト弾性部材５５を有する。 The exterior body 50 (front exterior body 50A and rear exterior body 50B) is arranged on the non-skin surface side T2 with respect to the absorbent main body 20. The exterior body 50 may be composed of a plurality of sheet members. Note that the exterior body 50 may include a sheet member disposed closer to the skin surface T1 than the absorbent main body 20. The exterior body 50 also includes a waist elastic member 55.

前外装体５０Ａは、第１前側シート５１Ｆ、及び第１前側シート５１Ｆよりも肌面側Ｔ１に配置される第２前側シート５２Ｆを有してよい。第１前側シート５１Ｆは、ウエスト弾性部材５５よりも非肌面側Ｔ２に配置されてよい。第２前側シート５２Ｆは、ウエスト弾性部材５５よりも肌面側Ｔ１に配置されてよい。第１前側シート５１Ｆは、前後方向Ｌにおける外側の部分が肌面側Ｔ１に折り返されてよい。第２前側シート５２Ｆは、第１前側シート５１Ｆの肌面側Ｔ１に折り返された部分よりも非肌面側Ｔ２に配置されてよい。第１前側シート５１Ｆ及び第２前側シート５２Ｆは、例えば不織布により構成されてよい。 The front exterior body 50A may include a first front sheet 51F and a second front sheet 52F that is disposed closer to the skin surface T1 than the first front sheet 51F. The first front sheet 51F may be arranged on the non-skin surface side T2 with respect to the waist elastic member 55. The second front sheet 52F may be arranged closer to the skin side T1 than the waist elastic member 55. The outer portion of the first front sheet 51F in the front-rear direction L may be folded back to the skin side T1. The second front sheet 52F may be arranged on the non-skin side T2 from the portion of the first front sheet 51F that is folded back to the skin side T1. The first front sheet 51F and the second front sheet 52F may be made of, for example, nonwoven fabric.

後外装体５０Ｂは、前外装体５０Ａと前後方向Ｌに離間してよい。後外装体５０Ｂは、第１後側シート５１Ｒ、及び第１後側シート。第１後側シート５１Ｒは、ウエスト弾５１Ｒよりも肌面側Ｔ１に配置される第２後側シート５２Ｒを有してよい性部材５５よりも非肌面側Ｔ２に配置されてよい。第２後側シート５２Ｒは、ウエスト弾性部材５５よりも肌面側Ｔ１に配置されてよい。第１後側シート５１Ｒ及び第２後側シート５２Ｒは、例えば不織布により構成されてよい。 The rear exterior body 50B may be spaced apart from the front exterior body 50A in the front-rear direction L. The rear exterior body 50B includes a first rear seat 51R and a first rear seat. The first rear sheet 51R may be arranged closer to the non-skin side T2 than the sex member 55, which may have the second rear sheet 52R arranged closer to the skin side T1 than the waist bullet 51R. The second rear sheet 52R may be arranged closer to the skin side T1 than the waist elastic member 55. The first rear sheet 51R and the second rear sheet 52R may be made of, for example, nonwoven fabric.

ウエスト弾性部材５５は、胴回り域（前胴回り域Ｓ１又は後胴回り域Ｓ２）において幅方向Ｗに伸長した状態で配置される。ウエスト弾性部材５５は、連続弾性部材５５Ｃと、非連続弾性部材５５Ｎとにより構成されてよい。連続弾性部材５５Ｃは、胴回り域（前胴回り域Ｓ１又は後胴回り域Ｓ２）の一方の外側部から他方の外側部まで幅方向Ｗに連続的に延びる。非連続弾性部材５５Ｎは、少なくとも胴回り域の幅方向Ｗの中央において幅方向Ｗに連続的に延びていない。胴回り域の幅方向Ｗの中央は、少なくとも吸収コア３１の一方の外側縁から他方の外側縁までの領域である。連続弾性部材５５Ｃは、前胴回り域Ｓ１に配置される前連続弾性部材５５ＣＦと、後胴回り域Ｓ２に配置される後連続弾性部材５５ＣＲとを有してよい。非連続弾性部材５５Ｎは、前胴回り域Ｓ１に配置される前非連続弾性部材５５ＮＦと、後胴回り域Ｓ２に配置される後非連続弾性部材５５ＮＲとを有してよい。 The waist elastic member 55 is disposed in a state extending in the width direction W in the waist region (front waist region S1 or rear waist region S2). The waist elastic member 55 may include a continuous elastic member 55C and a discontinuous elastic member 55N. The continuous elastic member 55C extends continuously in the width direction W from one outer side to the other outer side of the waist region (front waist region S1 or rear waist region S2). The discontinuous elastic member 55N does not extend continuously in the width direction W at least at the center of the waist region in the width direction W. The center of the waist region in the width direction W is an area extending from at least one outer edge of the absorbent core 31 to the other outer edge. The continuous elastic member 55C may include a front continuous elastic member 55CF disposed in the front waistline region S1 and a rear continuous elastic member 55CR disposed in the rear waistline region S2. The discontinuous elastic member 55N may include a front discontinuous elastic member 55NF disposed in the front waist region S1 and a rear discontinuous elastic member 55NR disposed in the rear waist region S2.

ウエスト弾性部材５５は、幅方向Ｗに延びる糸状又は紐状の弾性部材である線状弾性部材５５Ｌにより構成されてよく、シート状の弾性部材である伸縮シート５５Ｓにより構成されてよい。線状弾性部材５５Ｌは、幅方向Ｗに沿って直線状に延びてよい。線状弾性部材５５Ｌの前後方向Ｌの長さ（すなわち、弾性部材の太さ）は、例えば、５ｍｍ未満であってよい。伸縮シート５５Ｓの前後方向Ｌの長さは、例えば、５ｍｍ以上であってよい。実施形態では、ウエスト弾性部材５５は、線状弾性部材５５Ｌと伸縮シート５５Ｓとにより構成される。具体的には、連続弾性部材５５Ｃは、線状弾性部材５５Ｌと伸縮シート５５Ｓとにより構成され、非連続弾性部材５５Ｎは、線状弾性部材５５Ｌにより構成されている。伸縮シート５５Ｓは、連続弾性部材５５Ｃを構成する。伸縮シート５５Ｓは、厚さ方向Ｔにおいて、第１前側シート５１Ｆと第２前側シート５２Ｆとの間に配置されてよい。伸縮シート５５Ｓは、線状弾性部材５５Ｌよりも肌面側Ｔ１に配置されてよい。 The waist elastic member 55 may be composed of a linear elastic member 55L that is a thread-like or string-like elastic member extending in the width direction W, or may be composed of a stretchable sheet 55S that is a sheet-like elastic member. The linear elastic member 55L may extend linearly along the width direction W. The length of the linear elastic member 55L in the front-rear direction L (that is, the thickness of the elastic member) may be, for example, less than 5 mm. The length of the elastic sheet 55S in the front-rear direction L may be, for example, 5 mm or more. In the embodiment, the waist elastic member 55 is composed of a linear elastic member 55L and an elastic sheet 55S. Specifically, the continuous elastic member 55C is composed of a linear elastic member 55L and an elastic sheet 55S, and the discontinuous elastic member 55N is composed of a linear elastic member 55L. The elastic sheet 55S constitutes a continuous elastic member 55C. The elastic sheet 55S may be arranged in the thickness direction T between the first front sheet 51F and the second front sheet 52F. The elastic sheet 55S may be arranged closer to the skin surface T1 than the linear elastic member 55L.

線状弾性部材５５Ｌにより構成される前連続弾性部材５５ＣＦは、第１連続弾性部材５５Ｃ１と第２連続弾性部材５５Ｃ２とを有してよい。第１連続弾性部材５５Ｃ１は、後述の中央低収縮領域ＬＥＲ１よりも前後方向Ｌの内側において、前胴回り域Ｓ１の一方の側端部から他方の側端部まで連続的に延びる。第２連続弾性部材５５Ｃ２は、中央低収縮領域ＬＥＲ１よりも前後方向Ｌの外側において、前胴回り域Ｓ１の一方の側端部から他方の側端部まで連続的に延びる。第１連続弾性部材５５Ｃ１は、前胴回り域Ｓ１におけるサイド接合部１６の前端縁１６Ｆから、吸収性物品１の前後方向Ｌの全長（吸収性物品１の前端縁から後端縁まで）に対するする５％から２０％後方に配置されてよい。また、前胴回り域Ｓ１において、第１連続弾性部材５５Ｃ１は、サイド接合部１６の後端縁１６Ｒから、サイド接合部１６の前後方向Ｌの全長に対する２０％から９０％前方、好ましくは、４０％から７０％前方、より好ましくは、４５％から６５％前方に配置されてよい。 The front continuous elastic member 55CF constituted by the linear elastic member 55L may include a first continuous elastic member 55C1 and a second continuous elastic member 55C2. The first continuous elastic member 55C1 extends continuously from one side end of the front waist region S1 to the other side end on the inner side in the front-rear direction L of the central low contraction region LER1, which will be described later. The second continuous elastic member 55C2 extends continuously from one side end of the front waist region S1 to the other side end on the outer side of the central low shrinkage region LER1 in the front-rear direction L. The first continuous elastic member 55C1 has a width of 5% relative to the entire length of the absorbent article 1 in the front-rear direction L (from the front edge to the rear edge of the absorbent article 1) from the front edge 16F of the side joint portion 16 in the front waist region S1. % to 20% backward. Further, in the front waist region S1, the first continuous elastic member 55C1 extends from 20% to 90% forward, preferably 40%, of the entire length of the side joint 16 in the front-rear direction L from the rear end edge 16R of the side joint 16. 70% forward, more preferably 45% to 65% forward.

線状弾性部材５５Ｌにより構成される前非連続弾性部材５５ＮＦは、第１非連続弾性部材５５Ｎ１、第２非連続弾性部材５５Ｎ２を有してよい。第１非連続弾性部材５５Ｎ１は、前後方向Ｌに間隔を空けて配置される複数の線状弾性部材５５Ｌにより構成される。複数の線状弾性部材５５Ｌ（第１非連続弾性部材５５Ｎ１）のうち少なくとも一部の幅方向Ｗの長さ、すなわち、前胴回り域Ｓ１の外側部から幅方向Ｗの内側へ向かって連続的に延びる長さが異なる。第２非連続弾性部材５５Ｎ２は、第１連続弾性部材５５Ｃ１よりも前後方向Ｌの内側に配置される。第１非連続弾性部材５５Ｎ１は、サイド接合部１６から後述のサイド収縮領域ＥＲ１の内側縁まで幅方向Ｗの内側へ直線状に延びてよい。同様に、第２非連続弾性部材５５Ｎ２は、サイド接合部１６から後述の股側サイド収縮領域ＥＲ２の内側縁まで幅方向Ｗの内側へ直線状に延びてよい。 The front discontinuous elastic member 55NF constituted by the linear elastic member 55L may include a first discontinuous elastic member 55N1 and a second discontinuous elastic member 55N2. The first discontinuous elastic member 55N1 is composed of a plurality of linear elastic members 55L arranged at intervals in the front-rear direction L. The length of at least part of the plurality of linear elastic members 55L (first discontinuous elastic members 55N1) in the width direction W, that is, continuously from the outer side of the front waist region S1 toward the inner side in the width direction W. The length of extension is different. The second discontinuous elastic member 55N2 is arranged inside the first continuous elastic member 55C1 in the front-rear direction L. The first discontinuous elastic member 55N1 may linearly extend inward in the width direction W from the side joint portion 16 to the inner edge of the side contraction region ER1, which will be described later. Similarly, the second discontinuous elastic member 55N2 may linearly extend inward in the width direction W from the side joint portion 16 to the inner edge of the crotch side contraction region ER2, which will be described later.

第１非連続弾性部材５５Ｎ１は、後述のサイド収縮領域ＥＲ１に少なくとも配置される。第１非連続弾性部材５５Ｎ１は、非連続的に中央低収縮領域ＬＥＲ１に配置されてよい。また、第２非連続弾性部材５５Ｎ２は、後述の股側サイド収縮領域ＥＲ２に少なくとも配置される。第２非連続弾性部材５５Ｎ２は、非連続的に股側低収縮領域ＬＥＲ２に配置されてよい。後非連続弾性部材５５ＮＲは、後述の背側サイド収縮領域ＥＲＲに少なくとも配置される。後非連続弾性部材５５ＮＲは、非連続的に背側低収縮領域ＬＥＲＲに配置されてよい。 The first discontinuous elastic member 55N1 is arranged at least in the side contraction region ER1, which will be described later. The first discontinuous elastic member 55N1 may be disposed discontinuously in the central low shrinkage region LER1. Further, the second discontinuous elastic member 55N2 is arranged at least in the crotch side contraction region ER2, which will be described later. The second discontinuous elastic member 55N2 may be disposed discontinuously in the crotch-side low contraction region LER2. The rear discontinuous elastic member 55NR is arranged at least in the dorsal side contraction region ERR, which will be described later. The rear discontinuous elastic member 55NR may be disposed discontinuously in the dorsal low contraction region LERR.

（３）低収縮領域及び一対の収縮領域
低収縮領域及び一対の収縮領域について説明する。吸収性物品１には、低収縮領域及び一対の収縮領域が設けられる。低収縮領域は、幅方向Ｗに隣接する一対の収縮領域よりも幅方向Ｗの収縮力が低い領域である。実施形態において、低収縮領域は、中央低収縮領域ＬＥＲ１、股側低収縮領域ＬＥＲ２、背側低収縮領域ＬＥＲＲを有し、一対の収縮領域は、一対のサイド収縮領域ＥＲ１、一対の股側サイド収縮領域ＥＲ２、背側サイド収縮領域ＥＲＲを有する。 (3) Low shrinkage region and pair of shrinkage regions The low shrinkage region and pair of shrinkage regions will be explained. The absorbent article 1 is provided with a low shrinkage region and a pair of shrinkage regions. The low shrinkage region is a region in which the shrinkage force in the width direction W is lower than that of a pair of shrinkage regions adjacent in the width direction W. In the embodiment, the low shrinkage regions include a central low shrinkage region LER1, a crotch side low shrinkage region LER2, and a dorsal low shrinkage region LERR, and the pair of shrinkage regions include a pair of side shrinkage regions ER1, a pair of crotch side low shrinkage regions. It has a contraction region ER2 and a dorsal side contraction region ERR.

中央低収縮領域ＬＥＲ１は、前胴回り域Ｓ１において吸収性物品１の幅方向Ｗの中心である幅中心ＷＣを跨ぐ領域である。一対のサイド収縮領域ＥＲ１は、幅方向Ｗにおいて中央低収縮領域ＬＥＲ１の両外側に隣接する領域である。一対のサイド収縮領域ＥＲ１は、サイド収縮領域ＥＲ１の内側縁からサイド接合部１６まで幅方向に直線状に延びてよく、サイド接合部１６よりも幅方向Ｗの外側まで延びてよい。中央低収縮領域ＬＥＲ１の幅方向Ｗの収縮力は、サイド収縮領域ＥＲ１の幅方向Ｗの収縮力よりも低い。同様に、股側低収縮領域ＬＥＲ２は、前胴回り域Ｓ１において幅中心ＷＣを跨ぐ。一対の股側サイド収縮領域ＥＲ２は、幅方向Ｗにおいて股側低収縮領域ＬＥＲ２の両外側に隣接する。一対の股側サイド収縮領域ＥＲ２は、股側サイド収縮領域ＥＲ２の内側縁からサイド接合部１６まで幅方向に直線状に延びてよく、サイド接合部１６よりも幅方向Ｗの外側まで延びてよい。股側低収縮領域ＬＥＲ２の幅方向Ｗの収縮力は、股側サイド収縮領域ＥＲ２の幅方向Ｗの収縮力よりも低い。なお、中央低収縮領域ＬＥＲ１は、股側低収縮領域ＬＥＲ２よりも前後方向Ｌの外側に位置してよい。また、背側低収縮領域ＬＥＲＲは、後胴回り域Ｓ２において幅中心ＷＣを跨ぐ。一対の背側サイド収縮領域ＥＲＲは、幅方向Ｗにおいて背側低収縮領域ＬＥＲＲの両外側に隣接する。一対の背側サイド収縮領域ＥＲＲは、背側サイド収縮領域ＥＲＲの内側縁からサイド接合部１６まで幅方向に直線状に延びてよく、サイド接合部１６よりも幅方向Ｗの外側まで延びてよい。背側低収縮領域ＬＥＲＲの幅方向Ｗの収縮力は、背側サイド収縮領域ＥＲＲの幅方向Ｗの収縮力よりも低い。 The central low shrinkage region LER1 is a region that straddles the width center WC, which is the center of the absorbent article 1 in the width direction W, in the front waistline region S1. The pair of side shrinkage regions ER1 are regions adjacent to both outer sides of the central low shrinkage region LER1 in the width direction W. The pair of side contraction regions ER1 may extend linearly in the width direction from the inner edge of the side contraction region ER1 to the side joint portion 16, and may extend to the outside of the side joint portion 16 in the width direction W. The shrinkage force in the width direction W of the central low shrinkage region LER1 is lower than the shrinkage force in the width direction W of the side shrinkage regions ER1. Similarly, the crotch side low shrinkage region LER2 straddles the width center WC in the front waist region S1. The pair of crotch side side contraction regions ER2 are adjacent to both outer sides of the crotch side low contraction region LER2 in the width direction W. The pair of crotch-side side contraction regions ER2 may extend linearly in the width direction from the inner edge of the crotch-side side contraction regions ER2 to the side joint portion 16, and may extend to the outside of the side joint portion 16 in the width direction W. . The contraction force in the width direction W of the crotch side low contraction region LER2 is lower than the contraction force in the width direction W of the crotch side side contraction region ER2. Note that the central low shrinkage region LER1 may be located on the outer side of the crotch side low shrinkage region LER2 in the front-rear direction L. Further, the dorsal low contraction region LERR straddles the width center WC in the rear waist region S2. The pair of dorsal side contraction regions ERR are adjacent to both outer sides of the dorsal low contraction region LERR in the width direction W. The pair of dorsal side contracted regions ERR may extend linearly in the width direction from the inner edge of the dorsal side contracted regions ERR to the side joint portion 16, and may extend to the outside of the side joint portion 16 in the width direction W. . The contraction force in the width direction W of the dorsal low contraction region LERR is lower than the contraction force in the width direction W of the dorsal side contraction region ERR.

低収縮領域を設けるために、例えば、以下の第１の方法又は第２の方法を用いることができる。第１の方法では、非連続弾性部材５５Ｎを伸長状態で配置しないことで、低収縮領域の幅方向Ｗの収縮力を一対の収縮領域の幅方向Ｗの収縮力よりも低くしてよい。例えば、非連続弾性部材５５Ｎを伸長状態で配置する領域には、非連続弾性部材５５Ｎを固定するための接着剤（例えば、ホットメルト型接着剤（ＨＭＡ））を配置して、低収縮領域には、非連続弾性部材５５Ｎを固定するための接着剤を配置しない。これにより、接着剤を配置した領域では、非連続弾性部材５５Ｎが伸長状態で固定される。接着剤を配置していない領域であって、接着剤を配置した領域に幅方向Ｗに挟まれている領域では、非連続弾性部材５５Ｎの伸長状態が維持されるため、当該領域で非連続弾性部材５５Ｎを切断することにより、切断された非連続弾性部材５５Ｎが収縮する。これにより、低収縮領域には、収縮性を有する（すなわち、伸長状態の）非連続弾性部材５５Ｎが配置されない。従って、低収縮領域では、非連続弾性部材５５Ｎが幅方向Ｗに連続的に延びない。この場合、低収縮領域の幅方向Ｗの収縮力は、０である。なお、上述の第１の方法により低収縮領域が設けられた場合、非連続弾性部材５５Ｎは、固定部分と非固定部分とを有してよい。固定部分は、伸長状態で配置されている部分である。非固定部分は、伸長状態で固定されずに自然状態で存在する部分である。 In order to provide the low shrinkage region, for example, the following first method or second method can be used. In the first method, the contraction force in the width direction W of the low contraction area may be lower than the contraction force in the width direction W of the pair of contraction areas by not arranging the discontinuous elastic member 55N in a stretched state. For example, an adhesive (for example, hot melt adhesive (HMA)) for fixing the discontinuous elastic member 55N is disposed in a region where the discontinuous elastic member 55N is disposed in a stretched state, and a low shrinkage region is provided. No adhesive is provided to fix the discontinuous elastic member 55N. As a result, the discontinuous elastic member 55N is fixed in an expanded state in the area where the adhesive is placed. In the area where no adhesive is placed and which is sandwiched in the width direction W by the area where the adhesive is placed, the stretched state of the discontinuous elastic member 55N is maintained. By cutting the member 55N, the cut discontinuous elastic member 55N contracts. As a result, the discontinuous elastic member 55N having contractibility (that is, in a stretched state) is not arranged in the low contraction region. Therefore, in the low shrinkage region, the discontinuous elastic member 55N does not extend continuously in the width direction W. In this case, the shrinkage force in the width direction W of the low shrinkage region is 0. Note that when the low shrinkage region is provided by the above-described first method, the discontinuous elastic member 55N may have a fixed portion and a non-fixed portion. A fixed part is a part that is arranged in an extended state. An unfixed part is a part that is not fixed in the stretched state and exists in its natural state.

第２の方法では、低収縮領域に固定されたウエスト弾性部材５５を複数箇所で切断（ぶつ切りに）して非連続弾性部材５５Ｎが形成することで、低収縮領域の幅方向Ｗの収縮力を一対の収縮領域の幅方向Ｗの収縮力よりも低くしてよい。これにより、非連続弾性部材５５Ｎが幅方向Ｗに連続的に延びていない。この場合、非連続弾性部材５５Ｎが伸長状態で固定されていても、非連続弾性部材５５Ｎの収縮力が低減している。なお、上述の第２の方法により設けられた低収縮領域には、収縮力が残っている非連続弾性部材５５Ｎが配置（固定）されているため、第２の方法で設けられた低収縮領域の収縮力は、０より大きいため、第１の方法で設けられた低収縮領域の収縮力よりも大きい。 In the second method, the waist elastic member 55 fixed in the low shrinkage region is cut (cut into pieces) at multiple locations to form discontinuous elastic members 55N, thereby reducing the shrinkage force in the width direction W of the low shrinkage region. The contraction force may be lower than the contraction force in the width direction W of the pair of contraction regions. As a result, the discontinuous elastic member 55N does not extend continuously in the width direction W. In this case, even if the discontinuous elastic member 55N is fixed in the stretched state, the contractile force of the discontinuous elastic member 55N is reduced. In addition, since the discontinuous elastic member 55N with remaining shrinkage force is placed (fixed) in the low shrinkage region provided by the second method described above, the low shrinkage region provided by the second method is Since the shrinkage force is greater than 0, it is larger than the shrinkage force of the low shrinkage region provided by the first method.

低収縮領域と一対の収縮領域とは、各領域の収縮力を測定することにより規定できてよい。各領域の「収縮力」は、以下の方法により、測定されてよい。各領域の収縮力を測定する際は、測定対象となる試験片を作成する。試験片の両端部を引張試験器のチャック（挟持具）によって挟持する。このとき、チャック間の距離を１００ｍｍとする。次に、幅方向Ｗにおけるチャックの一方を固定した状態で、チャック間の距離を変えるようにチャックのもう一方を移動させる。このときのチャックの移動スピードは、３００ｍｍ／ｍｉｎとする。チャックの移動中に、チャックにかかる応力を測定し、伸長状態から６０％（一定幅）の状態で得られた応力（Ｎ）を「収縮力」と定義する。 The low shrinkage region and the pair of shrinkage regions may be defined by measuring the shrinkage force of each region. The "contractile force" of each region may be measured by the following method. When measuring the contraction force in each region, create a test piece to be measured. Both ends of the test piece are clamped by the chuck (clamping tool) of the tensile tester. At this time, the distance between the chucks is 100 mm. Next, with one of the chucks fixed in the width direction W, the other chuck is moved so as to change the distance between the chucks. The moving speed of the chuck at this time is 300 mm/min. While the chuck is moving, the stress applied to the chuck is measured, and the stress (N) obtained when the chuck is 60% (constant width) from the stretched state is defined as the "shrinkage force".

また、ウエスト弾性部材５５の配置によって、低収縮領域と一対の収縮領域とが規定されてよい。具体的には、低収縮領域と収縮領域との幅方向Ｗの境界、すなわち、低収縮領域の側縁及び収縮領域の内側縁は、外装体５０の外側部から幅方向Ｗの内側に向かって連続的に延びた非連続弾性部材５５Ｎの内端縁によって規定できる。低収縮領域の側縁及び収縮領域の内側縁は、低収縮領域が第１の方法で設けられた場合には、非連続弾性部材５５Ｎの固定部分の内側縁であってよい。複数の非連続弾性部材５５Ｎが前後方向Ｌに間隔を空けて配置される場合、低収縮領域の側縁及び収縮領域の内側縁は、前後方向Ｌに隣接する非連続弾性部材５５Ｎの内端縁を結んだ直線によって規定される。収縮領域の外端縁は、前後方向Ｌにおいて最も外側の非連続弾性部材５５Ｎの位置であり、収縮領域の内端縁は、前後方向Ｌにおいて最も内側の非連続弾性部材５５Ｎの位置である。低収縮領域の外端縁は、幅方向Ｗの両側で当該低収縮領域に隣接する最も外側の非連続弾性部材５５Ｎの内側縁を結んだ仮想線によって規定され、低収縮領域の内端縁は、幅方向Ｗの両側で当該低収縮領域に隣接する最も内側の非連続弾性部材５５Ｎの内側縁を結んだ仮想線によって規定される。なお、非連続弾性部材５５Ｎが１本である場合、収縮領域の外端縁は、非連続弾性部材５５Ｎの外端縁の位置であり、収縮領域の内端縁は、非連続弾性部材５５Ｎの内端縁の位置である。低収縮領域の外端縁は、幅方向Ｗの両側で当該低収縮領域に隣接する非連続弾性部材５５Ｎの外端縁の内側縁を結んだ仮想線によって規定され、低収縮領域の内端縁は、幅方向Ｗの両側で当該低収縮領域に隣接する非連続弾性部材５５Ｎの内端縁の内側縁を結んだ仮想線によって規定される。 Further, depending on the arrangement of the waist elastic member 55, a low shrinkage region and a pair of shrinkage regions may be defined. Specifically, the boundary in the width direction W between the low shrinkage region and the shrinkage region, that is, the side edge of the low shrinkage region and the inner edge of the shrinkage region, extends from the outer part of the exterior body 50 toward the inner side in the width direction W. It can be defined by the inner edge of the discontinuous elastic member 55N that extends continuously. The side edge of the low shrinkage region and the inner edge of the shrinkage region may be the inner edge of the fixed portion of the discontinuous elastic member 55N when the low shrinkage region is provided in the first method. When a plurality of discontinuous elastic members 55N are arranged at intervals in the front-rear direction L, the side edges of the low contraction regions and the inner edges of the contraction regions are the inner edges of the discontinuous elastic members 55N adjacent in the front-rear direction L. defined by the straight line connecting the The outer edge of the contraction area is the position of the outermost discontinuous elastic member 55N in the front-rear direction L, and the inner edge of the contraction area is the position of the innermost discontinuous elastic member 55N in the front-rear direction L. The outer edge of the low shrinkage area is defined by a virtual line connecting the inner edges of the outermost discontinuous elastic members 55N adjacent to the low shrinkage area on both sides in the width direction W, and the inner edge of the low shrinkage area is , is defined by an imaginary line connecting the inner edges of the innermost discontinuous elastic member 55N adjacent to the low shrinkage region on both sides in the width direction W. Note that when there is one discontinuous elastic member 55N, the outer edge of the contraction area is the outer edge of the discontinuous elastic member 55N, and the inner edge of the contraction area is the position of the outer edge of the discontinuous elastic member 55N. This is the position of the inner edge. The outer edge of the low shrinkage area is defined by a virtual line connecting the inner edge of the outer edge of the discontinuous elastic member 55N adjacent to the low shrinkage area on both sides in the width direction W, and the inner edge of the low shrinkage area is defined by an imaginary line connecting the inner edges of the discontinuous elastic member 55N adjacent to the low shrinkage region on both sides in the width direction W.

中央低収縮領域ＬＥＲ１は、最小幅ＭＩと、最小幅ＭＩよりも前後方向Ｌの外側に位置する最大幅ＭＡと、を有する。中央低収縮領域ＬＥＲ１は、最小幅ＭＩの位置における中央低収縮領域ＬＥＲ１の側縁である最小側縁ＥＭＩと、最大幅ＭＡの位置における中央低収縮領域ＬＥＲ１の側縁である最大側縁ＥＭＡと、を有する。図４等に示すように、中央低収縮領域ＬＥＲ１の幅は、前後方向Ｌの外側に向かうにつれて広がってよい。従って、外装体５０の外側部から幅方向Ｗの内側に向かって連続的に延びた第１非連続弾性部材５５Ｎ１の内端縁は、前後方向Ｌの外側に位置する第１非連続弾性部材５５Ｎ１ほど、幅方向Ｗの外側に位置している。 The central low shrinkage region LER1 has a minimum width MI and a maximum width MA located outside the minimum width MI in the front-rear direction L. The central low shrinkage region LER1 has a minimum side edge EMI, which is the side edge of the central low shrinkage region LER1 at the position of the minimum width MI, and a maximum side edge EMA, which is the side edge of the central low shrinkage region LER1 at the position of the maximum width MA. , has. As shown in FIG. 4 and the like, the width of the central low shrinkage region LER1 may increase toward the outside in the front-rear direction L. Therefore, the inner edge of the first discontinuous elastic member 55N1 that continuously extends from the outer side of the exterior body 50 toward the inner side in the width direction W is the same as the first discontinuous elastic member 55N1 located on the outer side in the front-rear direction L. It is located on the outer side in the width direction W.

（４）骨盤との関係
本発明者は、鋭意検討を行った結果、骨盤に着目して***物の保持機能と着用者の装着感とを両立させることを見出し、本発明を完成するに至った。具体的には、図６及び図７に示すように、着用者の腸骨ＩＢの上端縁である腸骨稜ＩＣの高さは、着用者の腹側又は背側の中央部から側部に向かうにつれて高くなっている。従って、胴回り域において、前後方向Ｌの外側に向かうほど、着用者の脂肪及び内蔵等が腸骨ＩＢに覆われなくなり、腹部及び背部が身体の外側へ向かって出っ張り易くなる。従って、図８に示すように、胴回り域において、前後方向Ｌの外側に向かうほど、着用者の腹側及び背側それぞれにおける胴回りの周長ＣＬが長くなり、吸収性物品の胴回り域が着用者の身体を締め付け易くなる。また、ウエスト弾性部材５５の収縮によって、胴回り域の周長ＣＬがより長い前後方向Ｌの外側から胴回りの周長ＣＬがより短い前後方向Ｌの内側へ向かう力が、前胴回り域Ｓ１に働き易くなり、特に胴回り域の周長ＣＬが長い部分がずれ落ち易かった。 (4) Relationship with the pelvis As a result of intensive studies, the inventor of the present invention focused on the pelvis and discovered that it is possible to achieve both the function of retaining excrement and the comfort of the wearer, and has completed the present invention. Ta. Specifically, as shown in FIGS. 6 and 7, the height of the iliac crest IC, which is the upper edge of the wearer's ilium IB, varies from the center of the wearer's ventral or dorsal side to the side. It gets higher as you go. Therefore, in the waist region, the wearer's fat, internal organs, etc. are less covered by the ilium IB as the wearer moves outward in the front-rear direction L, and the abdomen and back tend to protrude toward the outside of the body. Therefore, as shown in FIG. 8, in the waist region, the circumference CL of the waist on each of the ventral and dorsal sides of the wearer increases as it goes outward in the front-rear direction L, and the waist region of the absorbent article It becomes easier to tighten the body of the person. Furthermore, due to the contraction of the waist elastic member 55, a force directed from the outside in the front-rear direction L, where the circumference CL of the waist region is longer, to the inside in the front-rear direction L, where the circumference CL of the waist region is shorter, tends to act on the front waist region S1. In particular, the portion of the waist area where the circumference CL was long was likely to slip off.

実施形態に係る吸収性物品１では、中央低収縮領域ＬＥＲ１と一対のサイド収縮領域ＥＲ１とが設けられると共に、中央低収縮領域ＬＥＲ１は、最小幅ＭＩと最大幅ＭＡとを有する。最大幅ＭＡは、最小幅ＭＩよりも前後方向Ｌの外側に位置する。これにより、図８に示すように、中央低収縮領域ＬＥＲ１の最大幅ＭＡの部分が、最小幅ＭＩの部分よりも胴回りの周長ＣＬが長い部分を覆うことができる。これにより、胴回りの周長ＣＬがより長い部分（すなわち、着用者の身体をより締め付け易い部分）を、サイド収縮領域ＥＲ１よりも収縮力が弱い中央低収縮領域ＬＥＲ１の最大幅ＭＡの部分で覆うことができる。従って、着用者の身体をより締め付け易い部分で、収縮力が弱くて着用者の身体が締め付けられ難い領域（すなわち、中央低収縮領域ＬＥＲ１）を大きくすることができ、着用者の装着感を向上できる。加えて、胴回りの周長ＣＬが長い部分において、幅方向Ｗの収縮力が弱くなり、前後方向Ｌの外側から内側へ向かう力を小さくすることができる。これにより、胴回りの周長ＣＬが長い部分がずれ落ち難くなり、着用者の装着感を向上できる。 The absorbent article 1 according to the embodiment is provided with a central low shrinkage region LER1 and a pair of side shrinkage regions ER1, and the central low shrinkage region LER1 has a minimum width MI and a maximum width MA. The maximum width MA is located outside the minimum width MI in the front-rear direction L. Thereby, as shown in FIG. 8, the portion of the central low shrinkage region LER1 having the maximum width MA can cover the portion where the circumference CL of the torso is longer than the portion having the minimum width MI. As a result, the part where the circumference CL of the torso is longer (that is, the part where the wearer's body is more likely to be tightened) is covered by the part of the maximum width MA of the central low contraction region LER1, which has a weaker contraction force than the side contraction region ER1. be able to. Therefore, it is possible to enlarge the area where the contraction force is weak and the wearer's body is difficult to tighten (i.e., the central low contraction area LER1), which is a part where the wearer's body is more likely to be tightened, and the wearer's wearing comfort is improved. can. In addition, the contraction force in the width direction W becomes weaker in the portion where the circumference CL of the torso is long, and the force directed from the outside to the inside in the front-rear direction L can be reduced. This makes it difficult for the portion of the torso with a long circumference CL to slip off, thereby improving the wearing comfort of the wearer.

また、胴回り域の幅が一定である場合、吸収性物品１の厚さが薄いほど着圧が低くなる。ここで、中央低収縮領域ＬＥＲ１の内端縁ＩＥは、吸収コア３１の外端縁３１Ｆよりも外側に位置するため、中央低収縮領域ＬＥＲ１は、吸収コア３１と厚さ方向Ｔにおいて重ならない。従って、中央低収縮領域ＬＥＲ１が吸収コア３１と厚さ方向Ｔに重なる場合と比較して、中央低収縮領域ＬＥＲ１における着圧を低くすることができる。これにより、中央低収縮領域ＬＥＲ１は、着用者の身体に低い着圧でフィットするため、着用者の装着感を向上できる。 Further, when the width of the waist region is constant, the thinner the absorbent article 1 is, the lower the wearing pressure becomes. Here, since the inner edge IE of the central low shrinkage region LER1 is located outside the outer edge 31F of the absorbent core 31, the central low shrinkage region LER1 does not overlap with the absorbent core 31 in the thickness direction T. Therefore, compared to the case where the central low shrinkage region LER1 overlaps the absorbent core 31 in the thickness direction T, the wearing pressure in the central low shrinkage region LER1 can be lowered. Thereby, the central low shrinkage region LER1 fits the wearer's body with low wearing pressure, so that the wearer's wearing comfort can be improved.

また、胴回り域において腸骨稜ＩＣの高さは、腹側又は背側の中央部から側部に向かうほど高くなるため、着用者の側部では、腹側又は背側の中央部と比較すると、内臓及び脂肪等が腸骨ＩＢに覆われている領域が大きくなる。このため、着用者の身体にサイド収縮領域ＥＲ１を密着させても、内臓及び脂肪等が圧迫され難い。そこで、幅方向Ｗにおいて一対のサイド収縮領域ＥＲ１が中央低収縮領域ＬＥＲ１の両外側に隣接することで、一対のサイド収縮領域ＥＲ１が、中央低収縮領域ＬＥＲ１よりも着用者の側部に配置され易くすることができる。一対のサイド収縮領域ＥＲ１が着用者の側部に配置された場合、一対のサイド収縮領域ＥＲ１の収縮によって着用者の身体に前胴回り域Ｓ１を密着させつつも、着用者が不快に感じ難い。このため、着用者の装着感を向上できる。 In addition, in the waist region, the height of the iliac crest IC increases from the center of the ventral or dorsal side toward the sides, so the height of the iliac crest IC increases from the center of the ventral or dorsal side to the side of the wearer compared to the center of the ventral or dorsal side. , the area where internal organs, fat, etc. are covered by the ilium IB becomes larger. Therefore, even if the side contraction region ER1 is brought into close contact with the wearer's body, internal organs, fat, etc. are not likely to be compressed. Therefore, by arranging the pair of side shrinkage regions ER1 adjacent to both outer sides of the center low shrinkage region LER1 in the width direction W, the pair of side shrinkage regions ER1 are arranged closer to the sides of the wearer than the center low shrinkage region LER1. It can be made easier. When the pair of side contraction regions ER1 are arranged on the sides of the wearer, the contraction of the pair of side contraction regions ER1 brings the front waist region S1 into close contact with the wearer's body, but the wearer does not feel uncomfortable. Therefore, the wearer's wearing comfort can be improved.

ここで、***物は吸収コア３１に吸収されて保持されるため、吸収コア３１の外端縁３１Ｆよりも前後方向Ｌの内側の領域が***物を保持する保持領域となる。実施形態では、中央低収縮領域ＬＥＲ１は、吸収コア３１と厚さ方向Ｔに重なっていない。具体的には、中央低収縮領域ＬＥＲ１の内端縁ＩＥを吸収コア３１の外端縁３１Ｆよりも前後方向Ｌの外側に位置する。これにより、保持領域よりも前後方向Ｌの外側に、サイド収縮領域ＥＲ１よりも収縮力が弱い中央低収縮領域ＬＥＲ１が設けることができる。これにより、***物を保持領域で保持しつつも、保持領域に中央低収縮領域ＬＥＲ１が設けられる場合と比較して***物の保持に与える影響を抑えることができる。また、吸収コア３１は***物を吸収することで膨らむため、保持領域よりも前後方向Ｌの外側に、収縮力が弱い中央低収縮領域ＬＥＲ１を設けることで、***後においても着用者の装着感を維持し易くなる。その結果、***物の保持機能を維持しながら着用者の装着感を向上することができため、***物の保持機能と着用者の装着感とを両立できる。 Here, since the excrement is absorbed and held by the absorbent core 31, the area inside the outer edge 31F of the absorbent core 31 in the front-rear direction L becomes a holding area that holds the excrement. In the embodiment, the central low shrinkage region LER1 does not overlap the absorbent core 31 in the thickness direction T. Specifically, the inner edge IE of the central low shrinkage region LER1 is located outside the outer edge 31F of the absorbent core 31 in the front-rear direction L. Thereby, the central low shrinkage region LER1, which has a weaker shrinkage force than the side shrinkage regions ER1, can be provided outside the holding region in the front-rear direction L. As a result, while the excrement is retained in the retention area, the influence on retention of the excrement can be suppressed compared to the case where the central low contraction area LER1 is provided in the retention area. In addition, since the absorbent core 31 expands by absorbing excrement, by providing a central low-contraction region LER1 with a weak contraction force outside the holding region in the front-rear direction L, the wearer feels comfortable even after excretion. becomes easier to maintain. As a result, the wearer's wearing comfort can be improved while maintaining the excrement retaining function, so that the excrement retaining function and the wearer's wearing comfort can be achieved at the same time.

また、中央低収縮領域ＬＥＲ１が設けられる第１胴回り域は、前胴回り域Ｓ１、すなわち、着用者の腹側に配置される。腹側の腸骨稜ＩＣの高さは、背側の腸骨稜ＩＣの高さよりも低いため、腹側では、背側と比較して、内臓及び脂肪等が腸骨ＩＢに覆われている領域が小さい。このため、腹部の方が、背部に比べると身体の外側へ出っ張り易い。そこで、着用者の腹部に中央低収縮領域ＬＥＲ１を配置することで、着用者の腹部が強く締め付けられる領域を低減して、装着感を向上させることができる。 Moreover, the first waist region in which the central low shrinkage region LER1 is provided is located in the front waist region S1, that is, on the ventral side of the wearer. The height of the iliac crest IC on the ventral side is lower than the height of the iliac crest IC on the dorsal side, so viscera and fat are covered by the iliac IB on the ventral side compared to the dorsal side. The area is small. For this reason, the abdomen tends to protrude outward from the body more easily than the back. Therefore, by arranging the central low contraction region LER1 on the wearer's abdomen, it is possible to reduce the area where the wearer's abdomen is strongly tightened and improve the wearing comfort.

また、前胴回り域Ｓ１において腸骨稜ＩＣの高さは中央部から側部に向かうほど高くなるため、中央部では、前後方向Ｌの外側（ウエスト開口部１７側）に向かうほど、腸骨ＩＢに覆われている領域が少なくなる。このため、前後方向Ｌの外側に向かうほど、着用者の身体が出っ張り易くなり、着用者の胴回りの周長ＣＬが長くなる。本実施形態では、中央低収縮領域ＬＥＲ１の幅は、前後方向Ｌの外側に向かうにつれて広がる。これにより、着用者の胴回りの周長ＣＬに応じて、中央低収縮領域ＬＥＲ１の幅が広くなり、着用者の身体を強く締め付けない領域が増える。その結果、装着感を向上させることができる。 In addition, in the front waist region S1, the height of the iliac crest IC increases as it goes from the center to the side. less area covered by For this reason, the wearer's body tends to protrude more outward in the front-rear direction L, and the circumference CL of the wearer's torso becomes longer. In this embodiment, the width of the central low shrinkage region LER1 increases toward the outside in the front-rear direction L. As a result, the width of the central low-contraction region LER1 increases in accordance with the circumference CL of the wearer's torso, and the region that does not strongly tighten the wearer's body increases. As a result, the wearing comfort can be improved.

また、実施形態では、中央低収縮領域ＬＥＲ１において、幅方向Ｗにおける収縮力が０より大きい。中央低収縮領域ＬＥＲ１は、延出部２４と厚さ方向Ｔに重なっている。これにより、図８Ｃに示すように、延出部２４が弱い力で幅方向Ｗに縮められることで、延出部２４と着用者の身体との間に小さな隙間を発生させることができる。その結果、隙間を小さくすることで***物の漏れを抑制しつつも、前胴回り域Ｓ１において延出部２４と重なることで蒸れ易くなる領域の通気性を向上させることができる。着用者の蒸れによる不快感を低減させて、装着感を向上させることができる。 Further, in the embodiment, the shrinkage force in the width direction W is greater than 0 in the central low shrinkage region LER1. The central low shrinkage region LER1 overlaps the extension portion 24 in the thickness direction T. Thereby, as shown in FIG. 8C, the extending portion 24 is contracted in the width direction W with a weak force, thereby creating a small gap between the extending portion 24 and the wearer's body. As a result, while suppressing the leakage of excrement by reducing the gap, it is possible to improve breathability in the region of the front waist region S1 that overlaps with the extension portion 24 and tends to become stuffy. It is possible to reduce the wearer's discomfort due to stuffiness and improve the wearing comfort.

また、延出部２４の外端縁２４Ｆよりも前後方向Ｌの外側の領域は、延出部２４と厚さ方向Ｔに重なる領域（以下、延出領域）よりも、腹部及び背部が身体の外側へ向かってより出っ張っている。そこで、中央低収縮領域ＬＥＲ１が、延出部２４の外端縁２４Ｆよりも前後方向Ｌの外側の領域（以下、外側領域）と厚さ方向Ｔに重なる場合には、外側領域の厚さは、延出部２４がない分だけ、延出領域の厚さよりも薄いため、外側領域の着圧は、延出領域の着圧よりも低くなる。加えて、外側領域は、収縮力の低い中央低収縮領域ＬＥＲ１と厚さ方向Ｔに重なっているため、延出領域よりも腹部及び背部が出っ張っている部分に対して、着圧が低くかつ強く締め付けない外側領域を配置することができ、着用者の装着感をさらに向上できる。 Further, the region outside the outer end edge 24F of the extension portion 24 in the front-rear direction L has a lower abdomen and back region than the region overlapping with the extension portion 24 in the thickness direction T (hereinafter referred to as the extension region). It protrudes more outward. Therefore, when the central low shrinkage region LER1 overlaps in the thickness direction T with a region outside the outer end edge 24F of the extension portion 24 in the front-rear direction L (hereinafter referred to as the outside region), the thickness of the outside region is Since the thickness of the outer region is thinner than that of the extension region due to the absence of the extension portion 24, the bonding pressure of the outer region is lower than that of the extension region. In addition, since the outer region overlaps in the thickness direction T with the central low shrinkage region LER1, which has a low contractile force, the pressure is lower and stronger on the protruding abdomen and back than in the extension region. A non-tightening outer region can be provided, further improving the wearer's comfort.

また、中央低収縮領域ＬＥＲ１の最大側縁ＥＭＡは、吸収コア３１の側縁３１Ｅよりも外側に配置されてよい。これにより、少なくとも一部のサイド収縮領域ＥＲ１は、吸収コア３１の側縁３１Ｅよりも幅方向Ｗの内側に配置されないため、吸収コア３１が幅方向Ｗの内側へ引っ張られ難くすることができる。その結果、吸収コア３１が幅方向Ｗに縮み難くなるため、吸収コア３１の吸収面積を確保することができ、***物が漏れることを抑制することができる。 Further, the maximum side edge EMA of the central low shrinkage region LER1 may be arranged outside the side edge 31E of the absorbent core 31. As a result, at least some of the side contraction regions ER1 are not arranged inside the side edge 31E of the absorbent core 31 in the width direction W, so that the absorbent core 31 can be made difficult to be pulled inward in the width direction W. As a result, the absorbent core 31 becomes difficult to shrink in the width direction W, so that the absorption area of the absorbent core 31 can be secured, and leakage of excrement can be suppressed.

また、中央低収縮領域ＬＥＲ１の最大側縁ＥＭＡは、吸収性本体２０の側縁２０Ｅよりも外側に配置されてよい。これにより、少なくとも一部のサイド収縮領域ＥＲ１は、吸収性本体２０の側縁２０Ｅよりも幅方向Ｗの内側に配置されないため、吸収性本体２０が幅方向Ｗの内側へ引っ張られ難くすることができる。その結果、吸収性本体２０が幅方向Ｗに縮み難くなるため、吸収性本体２０の面積を確保することができ、吸収性本体２０から***物が漏れることを抑制することができる。 Further, the maximum side edge EMA of the central low shrinkage region LER1 may be arranged outside the side edge 20E of the absorbent main body 20. As a result, at least some of the side contraction regions ER1 are not arranged inside the side edge 20E of the absorbent main body 20 in the width direction W, so that the absorbent main body 20 is difficult to be pulled inward in the width direction W. can. As a result, the absorbent body 20 becomes difficult to shrink in the width direction W, so the area of the absorbent body 20 can be secured, and leakage of excrement from the absorbent body 20 can be suppressed.

また、中央低収縮領域ＬＥＲ１の最小側縁ＥＭＩは、吸収コア３１の側縁３１Ｅよりも内側に配置されてよい。これにより、サイド収縮領域ＥＲ１の収縮によって、吸収コア３１の側縁３１Ｅが着用者の身体側へ近づく。吸収コア３１の側縁３１Ｅ付近において吸収性物品１と着用者の身体との間の隙間が低減し、***物の漏れを抑制できる。 Further, the minimum side edge EMI of the central low shrinkage region LER1 may be arranged inside the side edge 31E of the absorbent core 31. Thereby, the side edge 31E of the absorbent core 31 approaches the wearer's body side due to the contraction of the side contraction region ER1. The gap between the absorbent article 1 and the wearer's body is reduced near the side edge 31E of the absorbent core 31, and leakage of excrement can be suppressed.

また、ウエスト弾性部材５５は、中央低収縮領域ＬＥＲ１よりも前後方向Ｌの内側において、前胴回り域Ｓ１の一方の側端部から他方の側端部まで連続的に延びる第１連続弾性部材５５Ｃ１を有してよい。図６及び７に示すように、第１連続弾性部材５５Ｃ１が着用者の腸骨ＩＢ付近に位置するように、着用者が吸収性物品１を着用することで、前胴回り域Ｓ１を幅方向Ｗに連続的に密着させることができる。ここで、腸骨ＩＢよりも内側に存在する内臓及び脂肪等は圧迫され難いため、腸骨ＩＢ付近では、着用者の身体に前胴回り域Ｓ１を密着させても着用者が不快に感じ難い。また、第１連続弾性部材５５Ｃ１が着用者の腸骨ＩＢ付近に位置するように、着用者が吸収性物品１を着用することで、中央低収縮領域ＬＥＲ１は、腸骨ＩＢよりも上側の領域、すなわち、胴回りの周長が長くなる領域に配置される。従って、胴回りの周長が長くて装着感が悪化し易い部分に対して、着用者の身体を強く締め付けない領域を長く配置することができ、着用者の装着感を向上できる。 The waist elastic member 55 also includes a first continuous elastic member 55C1 that extends continuously from one side end to the other side end of the front waist region S1 on the inside of the central low shrinkage region LER1 in the front-rear direction L. may have. As shown in FIGS. 6 and 7, when the wearer wears the absorbent article 1 such that the first continuous elastic member 55C1 is located near the wearer's ilium IB, the front waist region S1 is can be brought into continuous contact with the Here, since the internal organs, fat, etc. that exist inside the ilium IB are not easily compressed, the wearer is unlikely to feel uncomfortable even if the front waist region S1 is brought into close contact with the wearer's body in the vicinity of the ilium IB. In addition, when the wearer wears the absorbent article 1 such that the first continuous elastic member 55C1 is located near the ilium IB of the wearer, the central low contraction region LER1 is located above the ilium IB. That is, it is arranged in a region where the circumference of the torso is long. Therefore, in contrast to a portion where the circumference of the torso is long and the wearing comfort is likely to deteriorate, a long region that does not strongly tighten the wearer's body can be provided, and the wearing comfort for the wearer can be improved.

また、第１連続弾性部材５５Ｃ１の収縮力は、他のウエスト弾性部材５５の収縮力よりも大きくてよい。従って、中央低収縮領域ＬＥＲ１及び一対のサイド収縮領域ＥＲ１よりも前後方向Ｌの内側に、中央低収縮領域ＬＥＲ１及び一対のサイド収縮領域ＥＲ１よりも収縮力が高い領域が存在する。また、股側低収縮領域ＬＥＲ１及び一対の股側サイド収縮領域ＥＲ２よりも前後方向Ｌの外側に、股側低収縮領域ＬＥＲ１及び一対の股側サイド収縮領域ＥＲ２よりも収縮力が高い領域が存在する。他のウエスト弾性部材５５は、第１連続弾性部材５５Ｃ１と同じ胴回り域のウエスト弾性部材５５であってよいし、前胴回り域Ｓ１及び後胴回り域Ｓ２の両方のウエスト弾性部材５５であってもよい。第１連続弾性部材５５Ｃ１が着用者の腸骨ＩＢ付近に位置するように着用者が吸収性物品１を着用した場合、内臓及び脂肪等は圧迫されずに着用者が不快に感じ難い腸骨ＩＢ付近で、収縮力が大きい第１連続弾性部材５５Ｃ１によって、着用者の身体に前胴回り域Ｓ１をしっかりと密着させることができる。 Further, the contraction force of the first continuous elastic member 55C1 may be greater than the contraction force of the other waist elastic members 55. Therefore, on the inner side of the central low shrinkage region LER1 and the pair of side contractile regions ER1 in the front-rear direction L, there is a region having a higher contractile force than the central low shrinkage region LER1 and the pair of side contractile regions ER1. Further, on the outer side of the crotch-side low-shrinkage region LER1 and the pair of crotch-side side-shrinkage regions ER2 in the front-rear direction L, there is a region having a higher contractile force than the crotch-side low-shrinkage region LER1 and the pair of crotch-side side shrinkage regions ER2. do. The other waist elastic members 55 may be waist elastic members 55 in the same waistline region as the first continuous elastic member 55C1, or may be waist elastic members 55 in both the front waistline region S1 and the back waistline region S2. . When the wearer wears the absorbent article 1 such that the first continuous elastic member 55C1 is located near the ilium IB of the wearer, internal organs, fat, etc. are not compressed, and the wearer does not feel uncomfortable at the ilium IB. Nearby, the first continuous elastic member 55C1 having a large contractile force can firmly bring the front waist region S1 into close contact with the wearer's body.

なお、第１連続弾性部材５５Ｃ１は、前胴回り域Ｓ１におけるサイド接合部１６の前端縁１６Ｆから、吸収性物品１の前後方向Ｌの全長に対するする５％から２０％後方に配置されてよい。これにより、第１連続弾性部材５５Ｃ１が、着用者の腸骨ＩＢ付近に位置し易くできる。また、前胴回り域Ｓ１において、第１連続弾性部材５５Ｃ１は、サイド接合部１６の後端縁１６Ｒから、サイド接合部１６の前後方向Ｌの全長に対する２０％から９０％前方、好ましくは、４０％から７０％前方、より好ましくは、４５％から６５％前方に配置されてよい。これにより、第１連続弾性部材５５Ｃ１が、着用者の腸骨ＩＢ付近に位置し易くできる。 Note that the first continuous elastic member 55C1 may be arranged 5% to 20% behind the front edge 16F of the side joint portion 16 in the front waist region S1 with respect to the entire length of the absorbent article 1 in the front-rear direction L. Thereby, the first continuous elastic member 55C1 can be easily positioned near the wearer's iliac bone IB. Further, in the front waist region S1, the first continuous elastic member 55C1 extends from 20% to 90% forward, preferably 40%, of the entire length of the side joint 16 in the front-rear direction L from the rear end edge 16R of the side joint 16. 70% forward, more preferably 45% to 65% forward. Thereby, the first continuous elastic member 55C1 can be easily positioned near the wearer's iliac bone IB.

ウエスト弾性部材５５の収縮力は、例えば、次の方法にて測定できる。吸収性物品１に生じていた皺が視認出来なくなる程に吸収性物品１を前後方向Ｌに最大に伸長した状態での、ウエスト弾性部材５５の有効長部分の幅方向Ｗの長さＨ０を測定する。次に、ウエスト弾性部材５５を吸収性物品１から取り外して、ウエスト弾性部材５５の有効長部分の幅方向Ｗの長さＨ１を測定する。そして、「収縮力＝Ｈ０／Ｈ１」によって、ウエスト弾性部材５５の収縮力を算出できる。なお、収縮力の代わりに、ウエスト弾性部材５５の太さを規定する番手により収縮力の大きさを比較してよい。 The contractile force of the waist elastic member 55 can be measured, for example, by the following method. Measure the length H0 of the effective length portion of the waist elastic member 55 in the width direction W with the absorbent article 1 stretched to the maximum in the front-rear direction L to the extent that the wrinkles that had occurred in the absorbent article 1 are no longer visible. do. Next, the waist elastic member 55 is removed from the absorbent article 1, and the length H1 of the effective length portion of the waist elastic member 55 in the width direction W is measured. Then, the contraction force of the waist elastic member 55 can be calculated from "contraction force=H0/H1". Note that instead of the contraction force, the size of the contraction force may be compared based on the count that defines the thickness of the waist elastic member 55.

また、股側低収縮領域ＬＥＲ２は、吸収コア３１と厚さ方向Ｔに重なってよい。収縮力が低い股側低収縮領域ＬＥＲ２と厚さ方向Ｔに重なっている吸収コア３１の部分は、幅方向Ｗに縮み難い。従って、吸収コア３１の吸収面積を確保することができ、***物の漏れを抑制できる。 Further, the crotch side low shrinkage region LER2 may overlap the absorbent core 31 in the thickness direction T. The portion of the absorbent core 31 that overlaps in the thickness direction T with the crotch side low shrinkage region LER2 with low shrinkage force is difficult to shrink in the width direction W. Therefore, the absorption area of the absorbent core 31 can be secured, and leakage of excrement can be suppressed.

また、吸収コア３１の側縁３１Ｅは、股側サイド収縮領域ＥＲ２と厚さ方向Ｔに重なってよい。これにより、股側サイド収縮領域ＥＲ２の収縮によって、吸収コア３１の側縁３１Ｅには幅方向Ｗの外側へ向かう力が働き、吸収コア３１が幅方向Ｗの外側へ引っ張られ易くなる。その結果、吸収コア３１の側縁３１Ｅが幅方向の外側へ引っ張られて、吸収コア３１が幅方向Ｗの外側へ引き延ばされる。吸収コア３１の吸収面積を確保することができ、***物が漏れることを抑制することができる。 Further, the side edge 31E of the absorbent core 31 may overlap the crotch-side side contraction region ER2 in the thickness direction T. Thereby, due to the contraction of the crotch-side side contraction region ER2, a force directed outward in the width direction W acts on the side edge 31E of the absorbent core 31, and the absorbent core 31 is easily pulled outward in the width direction W. As a result, the side edges 31E of the absorbent core 31 are pulled outward in the width direction, and the absorbent core 31 is stretched outward in the width direction W. The absorption area of the absorbent core 31 can be secured, and leakage of excrement can be suppressed.

また、股側サイド収縮領域ＥＲ２の内側縁は、スリット３５よりも外側に位置してよい。吸収コア３１のスリット３５は、周囲よりも剛性が低いため、幅方向Ｗに潰され易い。ここで、股側サイド収縮領域ＥＲ２の内側縁は、吸収コア３１のスリット３５よりも幅方向Ｗの外側に位置する。従って、股側低収縮領域ＬＥＲ２よりも収縮力が強い股側サイド収縮領域ＥＲ２が幅方向Ｗに収縮しても、スリット３５を幅方向Ｗに収縮させる力がスリット３５には働かない。これにより、スリット３５が幅方向Ｗに潰され難くなる。スリット３５が幅方向Ｗに潰されない場合には、スリット３５により幅方向Ｗに剛性差が発生するため、スリット３５を基点として吸収コア３１を幅方向Ｗに曲げ易くすることができる。吸収コア３１が幅方向Ｗに曲がることで、股下域Ｓ３に吸収コア３１が収納され易くなるため、装着感を向上できる。 Further, the inner edge of the crotch-side side contraction region ER2 may be located outside the slit 35. The slit 35 of the absorbent core 31 has lower rigidity than the surrounding area, and therefore is easily crushed in the width direction W. Here, the inner edge of the crotch-side side contraction region ER2 is located on the outer side of the slit 35 of the absorbent core 31 in the width direction W. Therefore, even if the crotch side side contraction region ER2, which has a stronger contraction force than the crotch side low contraction region LER2, contracts in the width direction W, the force that causes the slit 35 to contract in the width direction W does not act on the slit 35. This makes it difficult for the slit 35 to be crushed in the width direction W. When the slits 35 are not crushed in the width direction W, a difference in rigidity occurs in the width direction W due to the slits 35, so that the absorbent core 31 can be easily bent in the width direction W using the slits 35 as a base point. By bending the absorbent core 31 in the width direction W, the absorbent core 31 can be easily stored in the crotch region S3, so that the wearing comfort can be improved.

また、中央低収縮領域ＬＥＲ１の最小側縁ＥＭＩから最大側縁ＥＭＡまでの幅方向Ｗの長さＷ１に対する前後方向Ｌの長さＬ１の傾き（Ｌ１／Ｗ１）は、股側低収縮領域ＬＥＲ２の前後方向Ｌにおいて最も外側に位置する側縁から中央低収縮領域ＬＥＲ１の最小側縁ＥＭＩまでの幅方向Ｗの長さＷ２に対する前後方向Ｌの長さＬ２の傾き（Ｌ２／Ｗ２）よりも小さくてよい。身長が低い低月齢の幼児では、大人と比較すると、前後方向Ｌにおける腹側の胴回りの周長ＣＬの変化が大きい。従って、腸骨ＩＢよりも前後方向Ｌの外側において腸骨ＩＢに近い距離から腹側の胴回りの周長ＣＬが大きくなり始める。そこで、最小側縁ＥＭＩから最大側縁ＥＭＡまでの傾き（中央低収縮領域ＬＥＲ１の側縁の傾きＬ１／Ｗ１）を小さくすることで、低月齢の幼児の胴回りの周長ＣＬに応じて、中央低収縮領域ＬＥＲ１の幅を早めに広くすることができる。これにより、低月齢の幼児の胴回りの周長ＣＬに応じて、身体を強く締め付けない領域を配置することができるため、低月齢の幼児の装着感を向上できる。 In addition, the slope (L1/W1) of the length L1 in the front-rear direction with respect to the length W1 in the width direction W from the minimum side edge EMI to the maximum side edge EMA of the central low shrinkage region LER1 is It is smaller than the slope (L2/W2) of the length L2 in the front-rear direction L with respect to the length W2 in the width direction W from the outermost side edge of the central low contraction region LER1 to the minimum side edge EMI in the front-rear direction L. good. In young infants who are short in stature, the change in the circumference CL of the ventral trunk in the anteroposterior direction L is large compared to adults. Therefore, the circumference CL of the ventral trunk starts to increase from a distance closer to the ilium IB on the outer side of the ilium IB in the anteroposterior direction L. Therefore, by reducing the slope from the minimum side edge EMI to the maximum side edge EMA (the slope L1/W1 of the side edge of the central low contraction region LER1), the center The width of the low shrinkage region LER1 can be increased quickly. As a result, it is possible to arrange a region that does not strongly tighten the body in accordance with the circumference CL of the torso of a young infant, so that the wearing comfort of the young infant can be improved.

なお、腸骨稜ＩＲよりも上側に配置されやすい最大側縁ＥＭＡは、サイド接合部１６と吸収性本体２０の側縁２０Ｅとの幅方向Ｗの中心よりも幅方向Ｗの外側に位置していてもよい。また、腸骨ＩＢの形状を考慮して、吸収性本体２０よりも幅方向Ｗの外側で身体を強く締め付けない領域を広く確保するために、吸収性本体２０と厚さ方向Ｔに重なる第１非連続弾性部材５５Ｎのうちで最も前後方向Ｌの外側の第１非連続弾性部材５５Ｎの内側縁から、吸収性本体２０と厚さ方向Ｔに重ならない第１非連続弾性部材５５Ｎのうちで最も前後方向Ｌの内側の第１非連続弾性部材５５Ｎの内側縁までの幅方向Ｗの長さが、前後方向Ｌに隣接する第１非連続弾性部材５５Ｎ１の内端縁間の幅方向Ｗの長さのうちで最も大きくてよい。 Note that the maximum side edge EMA, which is likely to be placed above the iliac crest IR, is located outside in the width direction W from the center in the width direction W between the side joint portion 16 and the side edge 20E of the absorbent main body 20. You can. In addition, in consideration of the shape of the iliac bone IB, in order to secure a wide area outside the absorbent main body 20 in the width direction W where the body is not strongly tightened, the first From the inner edge of the first discontinuous elastic member 55N that is the outermost one in the front-rear direction L among the discontinuous elastic members 55N, The length in the width direction W to the inner edge of the first discontinuous elastic member 55N on the inner side in the longitudinal direction L is the length in the width direction W between the inner edges of the first discontinuous elastic members 55N1 adjacent in the longitudinal direction L. It's good to be the biggest of all.

（５）その他実施形態
上述の実施形態及び変更例は、例示説明を目的とするものであり、他の態様により本発明が実施されてよい。例えば、後胴回り域Ｓ２に中央低収縮領域ＬＥＲ１が設けられてよいし、前胴回り域Ｓ１と後胴回り域Ｓ２との両方に、中央低収縮領域ＬＥＲ１が設けられてよい。 (5) Other embodiments The above-described embodiments and modified examples are for the purpose of illustrative explanation, and the present invention may be implemented in other embodiments. For example, the central low shrinkage region LER1 may be provided in the rear waistline region S2, or the central low shrinkage region LER1 may be provided in both the front waistline region S1 and the rear waistline region S2.

また、背側低収縮領域ＬＥＲＲは、吸収コア３１と厚さ方向Ｔに重なってよい。背側低収縮領域ＬＥＲＲの幅は、股側低収縮領域ＬＥＲ２の幅よりも広くてよい。これにより、背側の吸収コア３１を腹側の吸収コア３１よりも幅方向Ｗに縮み難くすることができる。これにより、背側の吸収コア３１の吸収面積を広く確保することができ、便の収容空間を広く確保できる。その結果、***物が漏れることを抑制することができる。 Further, the back low shrinkage region LERR may overlap the absorbent core 31 in the thickness direction T. The width of the back low shrinkage region LERR may be wider than the width of the crotch low shrinkage region LER2. Thereby, the absorbent core 31 on the back side can be made more difficult to shrink in the width direction W than the absorbent core 31 on the ventral side. Thereby, the absorption area of the absorbent core 31 on the back side can be secured widely, and a large space for accommodating stool can be secured. As a result, leakage of excrement can be suppressed.

また、幅方向Ｗにおいて、股側サイド収縮領域ＥＲ２の内側縁は、吸収性本体２０の側縁よりも内側に位置してよい。さらに、幅方向Ｗにおいて、背側サイド収縮領域ＥＲＲの内側縁は、股側サイド収縮領域ＥＲ２の内側縁よりも内側に位置してよい。吸収性本体２０の背側は、抱っこにより介助者の腕に当たったり、寝姿勢によって床に当たったりするため、背側の吸収性本体２０は、腹側の吸収性本体２０よりも幅方向にズレ易い。背側サイド収縮領域ＥＲＲの内側縁が、股側サイド収縮領域ＥＲ２の内側縁よりも内側する場合には、吸収性本体が幅方向にズレたときに吸収性本体に掛かる背側サイド収縮領域ＥＲＲの伸縮力を、股側サイド収縮領域ＥＲ２の伸縮力よりも大きくすることができる。これにより、吸収性本体２０の幅方向Ｗのズレに応じて背側サイド収縮領域ＥＲＲの伸縮力がより大きくなるため、特に背側の吸収性本体２０を幅方向Ｗにズレ難くすることができる。 Further, in the width direction W, the inner edge of the crotch side side contraction region ER2 may be located inner than the side edge of the absorbent main body 20. Furthermore, in the width direction W, the inner edge of the dorsal side contraction region ERR may be located inside the inner edge of the crotch side contraction region ER2. The dorsal side of the absorbent main body 20 hits the arm of a caregiver when being held or hits the floor depending on the sleeping position, so the absorbent main body 20 on the dorsal side is wider in the width direction than the absorbent main body 20 on the ventral side. Easy to slip off. When the inner edge of the dorsal side contraction region ERR is inside the inner edge of the crotch side contraction region ER2, the dorsal side contraction region ERR hangs on the absorbent body when the absorbent body shifts in the width direction. It is possible to make the elastic force of the crotch side contraction region ER2 larger than that of the crotch side contraction region ER2. As a result, the stretching force of the back side contraction region ERR becomes larger in accordance with the deviation of the absorbent main body 20 in the width direction W, so that the back absorbent main body 20 in particular can be made difficult to shift in the width direction W. .

上述の実施形態、各変更例及びその他実施形態に係る吸収性物品１に係る構成は、適宜組み合わせることが可能であることに留意すべきである。本発明が本明細書中に説明した内容に限定されるものではない。特許請求の範囲の記載により定まる本発明の趣旨及び範囲を逸脱することなく修正及び変更態様として実施することができる。 It should be noted that the configurations of the absorbent article 1 according to the above-described embodiment, each modification example, and other embodiments can be combined as appropriate. The invention is not limited to what has been described herein. Modifications and changes may be made without departing from the spirit and scope of the present invention as defined by the claims.

１：吸収性物品
２０：吸収性本体
２４：延出部
３１：吸収コア
３５：スリット
５５：ウエスト弾性部材
５５ＣＦ：前連続弾性部材（連続弾性部材）
ＥＭＡ：最大側縁
ＥＭＩ：最小側縁
ＥＲ１：サイド収縮領域
ＥＲ２：股側サイド収縮領域
ＬＥＲ１：中央低収縮領域
ＬＥＲ２：股側低収縮領域
ＭＡ：最大幅
ＭＩ：最小幅 1 : Absorbent article 20 : Absorbent main body 24 : Extension part 31 : Absorbent core 35 : Slit 55 : Waist elastic member 55CF : Front continuous elastic member (continuous elastic member)
EMA: Maximum side edge EMI: Minimum side edge ER1: Side contraction area ER2: Crotch side side contraction area LER1: Central low contraction area LER2: Crotch side low contraction area MA: Maximum width MI: Minimum width

Claims

前後方向、及び前記前後方向に直交する幅方向と、厚さ方向と、
第１胴回り域と第２胴回り域により構成される胴回り域と、前記第１胴回り域及び前記第２胴回り域に前記前後方向で挟まれる股下域と、
吸収材料を含む吸収コアと、
前記第１胴回り域において前記幅方向に伸長した状態で配置されるウエスト弾性部材と、を有し、
前記第１胴回り域において吸収性物品の前記幅方向の中心である幅中心を跨ぐ中央低収縮領域と、前記幅方向において前記中央低収縮領域の両外側に隣接する一対のサイド収縮領域と、が設けられ、
前記中央低収縮領域の前記幅方向の収縮力は、前記サイド収縮領域の前記幅方向の収縮力よりも低い吸収性物品であって、
前記中央低収縮領域は、最小幅と、前記最小幅よりも前記前後方向の外側に位置する最大幅と、を有し、
前記前後方向において、前記中央低収縮領域の内端縁は、前記吸収コアの外端縁よりも外側に位置し、
前記ウエスト弾性部材は、前記中央低収縮領域よりも前記前後方向の内側において、前記第１胴回り域の一方の側端部から他方の側端部まで連続的に延びる連続弾性部材を有し、
前記第１胴回り域において、前記連続弾性部材よりも前記前後方向の内側で前記幅中心を跨ぐ股側低収縮領域と、前記連続弾性部材よりも前記前後方向の内側で前記幅方向において前記股側低収縮領域の両外側に隣接する一対の股側サイド収縮領域と、が設けられており、
前記股側低収縮領域の前記幅方向の収縮力は、前記股側サイド収縮領域の前記幅方向の収縮力よりも低く、
前記股側低収縮領域は、前記吸収コアと前記厚さ方向に重なる、吸収性物品。 a front-back direction, a width direction perpendicular to the front-back direction, and a thickness direction;
a waist region formed by a first waist region and a second waist region, and an inseam region sandwiched between the first waist region and the second waist region in the front-rear direction;
an absorbent core including an absorbent material;
a waist elastic member disposed in the first waist region in a stretched state in the width direction;
In the first waist region, a central low shrinkage region straddles the width center that is the center of the absorbent article in the width direction, and a pair of side shrinkage regions adjacent to both outer sides of the central low shrinkage region in the width direction. established,
The widthwise shrinkage force of the central low shrinkage region is lower than the widthwise shrinkage force of the side shrinkage regions,
The central low shrinkage region has a minimum width and a maximum width located outside the minimum width in the front-rear direction,
In the front-rear direction, the inner edge of the central low shrinkage region is located outside the outer edge of the absorbent core,
The waist elastic member has a continuous elastic member that extends continuously from one side end to the other side end of the first waist region on the inside of the central low shrinkage region in the front-rear direction,
In the first girth region, a crotch-side low shrinkage region that straddles the width center on the inside of the continuous elastic member in the front-rear direction, and a crotch-side low-shrinkage region that straddles the width center on the inside of the continuous elastic member in the front-back direction and on the crotch side in the width direction. A pair of crotch side side contraction areas adjacent to both outer sides of the low contraction area are provided,
The contraction force in the width direction of the crotch side low contraction area is lower than the contraction force in the width direction of the crotch side side contraction area,
The absorbent article, wherein the crotch side low shrinkage region overlaps the absorbent core in the thickness direction.

前記吸収コアの側縁は、前記股側サイド収縮領域と前記厚さ方向に重なる請求項１に記載の吸収性物品。 The absorbent article according to claim 1, wherein a side edge of the absorbent core overlaps the crotch side contraction region in the thickness direction.

前記吸収コアは、前記股下域において、前記前後方向に延びるスリットを有し、
前記幅方向において、前記股側サイド収縮領域の内側縁は、前記スリットよりも外側に位置する請求項１又は２に記載の吸収性物品。 The absorbent core has a slit extending in the front-rear direction in the crotch region,
The absorbent article according to claim 1 or 2, wherein in the width direction, an inner edge of the crotch-side side contraction region is located outside the slit.

前記第１胴回り域は、着用者の腹側に配置されており、
前記中央低収縮領域の幅が、前記前後方向の外側に向かうにつれて広がっており、
前記最小幅の位置における前記中央低収縮領域の側縁である最小側縁から前記最大幅の位置における前記中央低収縮領域の側縁である最大側縁までの前記幅方向の長さに対する前記前後方向の長さの傾きは、前記股側低収縮領域の前記前後方向において最も外側に位置する側縁から前記中央低収縮領域の前記最小側縁までの前記幅方向の長さに対する前記前後方向の長さの傾きよりも小さい請求項１から３のいずれか１項に記載の吸収性物品。 The first waist region is located on the ventral side of the wearer,
The width of the central low shrinkage region increases toward the outside in the front-rear direction,
The front and back with respect to the length in the width direction from the minimum side edge that is the side edge of the central low shrinkage area at the position of the minimum width to the maximum side edge that is the side edge of the central low shrinkage area at the position of the maximum width. The inclination of the length in the front-rear direction is the slope of the length in the front-rear direction relative to the length in the width direction from the outermost side edge of the crotch side low-shrinkage region in the front-back direction to the minimum side edge of the central low-shrinkage region. The absorbent article according to any one of claims 1 to 3, which is smaller than the slope of the length.

前記中央低収縮領域において前記幅方向における収縮力が０より大きく、
前記吸収コアを有し、かつ前記股下域から前記第１胴回り域へ延びる吸収性本体を有し、
前記吸収性本体は、前記吸収コアの前記前後方向における外端縁よりも前記前後方向の外側にまで延びる延出部を有し、
前記中央低収縮領域は、前記延出部と前記厚さ方向に重なる請求項１から４のいずれか１項に記載の吸収性物品。 In the central low shrinkage region, the shrinkage force in the width direction is greater than 0;
an absorbent body having the absorbent core and extending from the crotch region to the first waist region;
The absorbent main body has an extension portion that extends further outward in the front-rear direction than the outer end edge of the absorbent core in the front-rear direction,
The absorbent article according to any one of claims 1 to 4, wherein the central low shrinkage region overlaps the extending portion in the thickness direction.

前記吸収コアを有し、かつ前記股下域から前記第１胴回り域へ延びる吸収性本体を有し、
前記吸収性本体は、前記吸収コアの前記前後方向における外端縁よりも前記前後方向の外側にまで延びる延出部を有し、
前記中央低収縮領域は、前記延出部の外端縁よりも前記前後方向の外側の領域と前記厚さ方向に重なる請求項１から５のいずれか１項に記載の吸収性物品。 an absorbent body having the absorbent core and extending from the crotch region to the first waist region;
The absorbent main body has an extension portion that extends further outward in the front-rear direction than the outer end edge of the absorbent core in the front-rear direction,
The absorbent article according to any one of claims 1 to 5, wherein the central low shrinkage region overlaps in the thickness direction a region outside the outer end edge of the extension portion in the front-rear direction.

前記連続弾性部材の収縮力は、他のウエスト弾性部材の収縮力よりも大きい請求項１から６のいずれか１項に記載の吸収性物品。 The absorbent article according to any one of claims 1 to 6 , wherein the contraction force of the continuous elastic member is larger than the contraction force of other waist elastic members.

前記幅方向において、前記最大幅の位置における前記中央低収縮領域の側縁である最大側縁は、前記吸収コアの側縁よりも外側に配置される、請求項１から７のいずれか１項に記載の吸収性物品。 Any one of claims 1 to 7 , wherein in the width direction, a maximum side edge that is a side edge of the central low shrinkage region at the position of the maximum width is located outside a side edge of the absorbent core. The absorbent article described in .

前記幅方向において、前記最小幅の位置における前記中央低収縮領域の側縁である最小側縁は、前記吸収コアの側縁よりも内側に位置する請求項１から８のいずれか１項に記載の吸収性物品。 According to any one of claims 1 to 8 , in the width direction, a minimum side edge that is a side edge of the central low shrinkage region at the position of the minimum width is located inside a side edge of the absorbent core. absorbent articles.

前記吸収コアを有し、前記股下域から前記第１胴回り域へ延びる吸収性本体を有し、
前記幅方向において、前記最大幅の位置における前記中央低収縮領域の側縁である最大側縁は、前記吸収性本体の側縁よりも外側に位置する請求項１から９のいずれか１項に記載の吸収性物品。 an absorbent body having the absorbent core and extending from the inseam region to the first waist region;
According to any one of claims 1 to 9 , in the width direction, a maximum side edge that is a side edge of the central low shrinkage region at the position of the maximum width is located outside a side edge of the absorbent main body. Absorbent article as described.