CN114929172B

CN114929172B - Absorbent article

Info

Publication number: CN114929172B
Application number: CN202080090161.8A
Authority: CN
Inventors: 手岛翠; 桥野夕贵; 工藤悦子; 吉冈稔泰
Original assignee: Unicharm Corp
Current assignee: Unicharm Corp
Priority date: 2019-12-27
Filing date: 2020-12-25
Publication date: 2023-08-01
Anticipated expiration: 2040-12-25
Also published as: WO2021132620A1; CN114929172A

Abstract

Provided is an absorbent article which can achieve both the function of retaining excreta and the feel of wearing by a wearer. The absorbent article (1) has an absorbent core (31) and a waist elastic member (55). A central low-shrinkage region (LER 1) extending across the Width Center (WC) of the absorbent article in the front body surrounding region (S1), and a pair of side shrinkage regions (ER 1) adjacent to both outer sides of the central low-shrinkage region (LER 1) in the width direction (W) are provided. The contraction force in the width direction W of the central low contraction region (LER 1) is lower than the contraction force in the width direction W of the side contraction regions (ER 1). The central low-shrinkage region (LER 1) has a minimum width (MI) and a maximum width (MA) located outside the minimum width (MI) in the front-rear direction (L). In the front-rear direction (L), the Inner End (IE) of the central low-shrinkage region (LER 1) is located outside the inner end (841I) of the front-rear joint (842).

Description

Absorbent article

Technical Field

The present invention relates to an absorbent article having an absorbent core containing an absorbent material and a waist elastic member disposed in a body-surrounding region in a state of extending in a width direction.

Background

Patent document 1 discloses an absorbent article having an absorbent core containing an absorbent material and a waist elastic member disposed in a state of being elongated in the width direction in a body-surrounding region, the absorbent article being provided with a central low-contraction region and a pair of side-contraction regions. The central low shrinkage region spans the widthwise center of the absorbent article. A pair of side constricted regions are adjacent to both outer sides of the central low constricted region in the width direction. In addition, the contraction force in the width direction of the central low contraction region is lower than the contraction force in the width direction of the side contraction regions. Since the body of the wearer protrudes from the buttocks on the back side, the maximum width of the central low-contraction region on the back side is made larger than the maximum width of the central low-contraction region on the abdomen side, so that the body of the wearer is not strongly tightened on the back side, and the wearer hardly feels uncomfortable.

On the other hand, by relatively increasing the contraction force of the side contraction regions adjacent to both outer sides of the central low contraction region in the width direction, the decrease in the fitting property of the body surrounding region is suppressed. Thus, the absorbent article is less likely to deviate from the body of the wearer, and the excrement is not leaked to the outside, so that the absorbent article can hold the excrement. In the absorbent article described above, the holding function of the excrement, which is the function of the absorbent article, is maintained, and the wearability of the absorbent article is improved.

Prior art literature

Patent literature

Patent document 1: japanese patent laid-open No. 2017-537726

Disclosure of Invention

In the absorbent article described above, the maximum width of the central low-shrinkage region on the back side is relatively adjusted with respect to the maximum width of the central low-shrinkage region on the abdominal side, thereby achieving an improvement in the wearability of the absorbent article. Therefore, focusing only on one side (the abdominal side or the back side) of the wearer's body, it is impossible to achieve both the function of holding excrement and the feeling of wearing by the wearer.

An object of the present invention is to provide an absorbent article having an absorbent core containing an absorbent material and a waist elastic member disposed in a state of being elongated in a width direction in a body surrounding region, the absorbent article being provided with a central low-shrinkage region and a pair of side-shrinkage regions, and being capable of achieving both a function of retaining excrement and a feeling of wearing by a wearer.

An absorbent article according to one aspect has a front-back direction, a width direction, a thickness direction, a body surrounding region, a crotch region, an absorbent core, and a waist elastic member, wherein the width direction is orthogonal to the front-back direction, the body surrounding region is constituted by a 1 st body surrounding region and a 2 nd body surrounding region, the crotch region is sandwiched between the 1 st body surrounding region and the 2 nd body surrounding region in the front-back direction, the absorbent core contains an absorbent material, and the waist elastic member is arranged in a state of extending in the width direction in the 1 st body surrounding region. A central low-shrinkage region and side-shrinkage regions are provided, the central low-shrinkage region crossing a widthwise center of the absorbent article in the 1 st body-surrounding region, the side-shrinkage regions being a pair, and being adjacent to both outer sides of the central low-shrinkage region in the widthwise direction. The central low shrinkage region has a lower shrinkage force in the width direction than the side shrinkage regions. The central low-shrinkage region has a minimum width and a maximum width, and the maximum width is located outside the minimum width in the front-rear direction. In the front-rear direction, the inner end edge of the central low shrinkage region is located outside the inner end edge of the front-rear joint portion.

An absorbent article according to another aspect includes a front-back direction, a width direction, a thickness direction, a body surrounding region, a crotch region, an absorbent core, and a waist elastic member, wherein the width direction is orthogonal to the front-back direction, the body surrounding region is constituted by a 1 st body surrounding region and a 2 nd body surrounding region, the crotch region is sandwiched between the 1 st body surrounding region and the 2 nd body surrounding region in the front-back direction, the absorbent core contains an absorbent material, and the waist elastic member is arranged in a state of extending in the width direction in the 1 st body surrounding region. A central low-shrinkage region and side-shrinkage regions are provided, the central low-shrinkage region crossing a widthwise center of the absorbent article in the 1 st body-surrounding region, the side-shrinkage regions being a pair, and being adjacent to both outer sides of the central low-shrinkage region in the widthwise direction. The central low shrinkage region has a lower shrinkage force in the width direction than the side shrinkage regions. The central low-shrinkage region has a minimum width and a maximum width, and the maximum width is located outside the minimum width in the front-rear direction. In the width direction, a maximum side edge, which is a side edge of the central low-shrinkage region, is located outside an inner edge of the front-rear joint portion at the maximum width position.

Drawings

Fig. 1 is a schematic front view of an absorbent article of the present embodiment.

Fig. 2 is a schematic plan view of the absorbent article of the present embodiment.

Fig. 3A is a schematic cross-sectional view of the absorbent article along the line F3A-F3A in fig. 2, and fig. 3B is a schematic cross-sectional view of the absorbent article along the line F3B-F3B in fig. 2.

Fig. 4 is a schematic plan view of an absorbent article for explaining waist elastic members and leg gathers.

Fig. 5 is a schematic top view of an absorbent article for illustrating a low shrinkage region and a leak-proof hemming.

Fig. 6 a is a schematic cross-sectional view of the absorbent article along the line F6-F6 in fig. 2, and fig. 6B is a schematic cross-sectional view of the absorbent article showing a state in which the standing portion is standing up.

Fig. 7 is a partially enlarged view of a schematic plan view of the absorbent article of the present embodiment.

Fig. 8 is a front view of an absorbent article for explaining the worn state of the absorbent article.

Fig. 9 is a side view of an absorbent article for explaining the worn state of the absorbent article.

Fig. 10 a is a schematic cross-sectional view taken along line F8A-F8A in fig. 8, fig. 10B is a schematic cross-sectional view taken along line F8B-F8B in fig. 8, and fig. 10C is a schematic enlarged view of fig. 8B.

Fig. 11 is a schematic view along the front-rear direction L for explaining the bending of the absorbent core.

Detailed Description

(1) Summary of the embodiments

An absorbent article according to one embodiment includes a front-back direction, a width direction, a thickness direction, a body surrounding region, a crotch region, an absorbent core, and a waist elastic member, wherein the width direction is orthogonal to the front-back direction, the body surrounding region is composed of a 1 st body surrounding region and a 2 nd body surrounding region, the crotch region is sandwiched between the 1 st body surrounding region and the 2 nd body surrounding region in the front-back direction, the absorbent core contains an absorbent material, and the waist elastic member is arranged in a state of extending in the width direction in the 1 st body surrounding region. A central low-shrinkage region and side-shrinkage regions are provided, the central low-shrinkage region crossing a widthwise center of the absorbent article in the 1 st body-surrounding region, the side-shrinkage regions being a pair, and being adjacent to both outer sides of the central low-shrinkage region in the widthwise direction. The central low shrinkage region has a lower shrinkage force in the width direction than the side shrinkage regions. The central low-shrinkage region has a minimum width and a maximum width, and the maximum width is located outside the minimum width in the front-rear direction. In the front-rear direction, the inner end edge of the central low shrinkage region is located outside the inner end edge of the front-rear joint portion. With this configuration, the excrement holding function can be maintained, and the wearing feeling of the wearer can be improved.

According to a preferred embodiment, the 1 st body surrounding area is disposed on the abdomen side of the wearer. Since the height of the iliac crest on the ventral side is lower than that of the iliac crest on the dorsal side, the region covered with ilium such as viscera and fat on the ventral side is smaller than that on the dorsal side. Therefore, the abdomen is more likely to protrude to the outside of the body than the back. Then, by disposing the central low-contraction region on the abdomen of the wearer, the region that strongly tightens the abdomen of the wearer can be reduced, and the wearing sensation can be improved.

According to a preferred embodiment, the width of the central low-shrinkage region is widened toward the outside in the front-rear direction. In the peripheral region, the height of the iliac crest increases from the central portion to the side portion, and therefore, the more the central portion is toward the outer side (waist opening side) in the front-rear direction, the less the region covered with the iliac crest is. Therefore, the farther outward in the front-rear direction, the more easily the wearer's body protrudes, the longer the circumference of the wearer's body circumference. By widening the width of the central low-contraction region as the outer side in the front-rear direction goes, the width of the central low-contraction region is widened corresponding to the circumference of the body circumference of the wearer, and the region where the body of the wearer is not strongly tightened increases. As a result, the wearing sensation can be improved.

According to a preferred embodiment, the front-rear joint portion and the side portion contraction region overlap in the thickness direction. The front-rear joined portions are brought into close contact with the wearer's body by contraction of the side contracted regions, so that a gap is less likely to occur between the wearer's body and the front-rear joined portions. Thus, leakage of excrement passing through the gap can be suppressed.

According to a preferred embodiment, the 1 st body surrounding region is disposed on the abdomen side of the wearer, the width of the central low shrinkage region is widened toward the outside in the front-rear direction, the central low shrinkage region has a wide region and a narrow region, the wide region extends from a position on the inner side in the width direction than the outer edge of the front-rear joining portion to a position on the outer side in the width direction than the outer edge of the front-rear joining portion, the narrow region is a region on the inner side in the front-rear direction than the wide region, and the length in the front-rear direction of the wide region is longer than the length in the front-rear direction of the narrow region. The leakage preventing cuffs extend in the front-rear direction in the crotch region, and therefore the front-rear joining portions are arranged in accordance with the strand width of the wearer. Here, since the length of the wide area in the front-rear direction is longer than the length of the narrow area in the front-rear direction, the proportion of the area of the central low-shrinkage area disposed on the outer side in the width direction than the position corresponding to the crotch width of the wearer can be increased. Thus, the wearer's body is not strongly tightened over a large area in the region on the outer side in the width direction than the position corresponding to the wearer's crotch width, and the wearing sensation can be improved.

According to a preferred embodiment, the 1 st body surrounding region is disposed on the abdomen side of the wearer, the absorbent core has a waist low basis weight portion having a lower basis weight than the surrounding area in the 1 st body surrounding region, the waist low basis weight portion has a rear end edge in the 1 st body surrounding region, and the inner end edge of the front-rear joint portion is located outside the rear end edge of the waist low basis weight portion in the front-rear direction. The inner portion of the absorbent core on the abdomen side of the wearer tends to bend in the non-skin side direction (direction away from the body of the wearer) in the front-back direction due to sitting posture, forward flexion, and the like. Here, since the difference in rigidity is large in the front and rear of the rear end edge of the waist portion low basis weight portion, the rear end edge of the waist portion low basis weight portion tends to become the bending base point of the absorbent core. In the front-rear direction, the inner end edge of the front-rear joined portion is located outside the end edge of the waist portion lower basis weight portion, so that the inner end edge of the front-rear joined portion is easily located outside the bending base point of the absorbent core in the front-rear direction. Thereby, the standing portion can stand up from the bending base point of the absorbent core. Therefore, a gap is less likely to occur between the standing base point of the standing portion and the curved base point of the absorbent core, and leakage of excrement from the gap can be suppressed. Further, the inner portion of the absorbent core is away from the body of the wearer, so that the inner portion of the absorbent core is also away from the apex of the standing portion existing closer to the body side of the wearer than the absorbent core. As a result, the height of the raised portion can be ensured, and leakage of excrement can be suppressed.

According to a preferred embodiment, the waist elastic member includes a continuous elastic member continuously extending from one end portion to the other end portion of the 1 st body peripheral region at a position on the inner side in the front-rear direction than the central low-contraction region. The wearer wears the absorbent article such that the continuous elastic member is positioned adjacent to the ilium of the wearer, thereby enabling the 1 st body peripheral region to be continuously abutted in the width direction. Here, since the viscera, fat, and the like existing on the inner side of the ilium are less likely to be pressed, the wearer is less likely to feel uncomfortable even if the 1 st body surrounding area is brought into close contact with the wearer's body. In addition, the wearer wears the absorbent article such that the continuous elastic member is positioned adjacent to the wearer's ilium, such that the central low-contraction region is disposed in a region above the ilium, i.e., in a region of increased circumference of the body circumference. Therefore, in the portion where the circumference of the body is long and the wearing sensation is liable to be deteriorated, the region which does not strongly tighten the body of the wearer can be arranged long, and the wearing sensation of the wearer can be improved.

According to a preferred embodiment, the contraction force of the continuous elastic member is larger than the contraction force of the other waist elastic members. When the wearer wears the absorbent article such that the continuous elastic member is positioned in the vicinity of the wearer's ilium, internal organs, fat, and the like existing on the inner side of the ilium are less likely to be compressed. Therefore, the 1 st body surrounding area can be firmly attached to the wearer's body by the continuous elastic member having a large contraction force in the vicinity of the ilium where the wearer is not likely to feel uncomfortable without being pressed by the viscera, fat, or the like.

According to a preferred embodiment, the absorbent core has a waist low basis weight portion having a lower basis weight than the surrounding area in the 1 st body surrounding area, and the continuous elastic member and the waist low basis weight portion overlap in the thickness direction. In the waist portion low in basis weight and rigidity, the contraction of the continuous elastic member is less likely to be hindered, and therefore the 1 st body surrounding area can be reliably brought into close contact with the body of the wearer. Further, the low basis weight waist portion has a low basis weight, and therefore is less likely to expand even when absorbing excrement. Therefore, even after the excretion, the contraction of the continuous elastic member is not easily hindered, and therefore the 1 st body surrounding area can be reliably brought into close contact with the body of the wearer.

According to a preferred embodiment, the central low shrinkage region overlaps with the outer edge of the absorbent core in the front-rear direction in the thickness direction. The outer end edge of the absorbent core is less rigid than the portion on the inner side in the front-rear direction than the outer end edge of the absorbent core (hereinafter referred to as the inner core portion), and therefore tends to contract in the width direction. In the case where the outer end edge of the absorbent core is contracted in the width direction, the larger the difference in contraction between the outer end edge of the absorbent core and the inner core portion, the more easily the inner core portion is away from the wearer's body in order to escape the force applied in the width direction. Then, by overlapping the central low-contraction region having a low contraction force with the outer end edge of the absorbent core in the thickness direction, the outer end portion of the absorbent core including the outer end edge of the absorbent core can be made less likely to contract in the width direction. Thus, the absorbent core is less likely to be away from the body, and excrement is likely to reach the absorbent core, thereby further suppressing leakage of excrement.

According to a preferred embodiment, the absorbent article has an absorbent main body having the absorbent core and extending from the crotch region to the 1 st body peripheral region, the absorbent main body has an extension portion extending to a position outside the outer edge of the absorbent core in the front-rear direction, and the central low shrinkage region overlaps with the extension portion in the thickness direction. The more outward in the front-rear direction, the more easily the abdomen and back protrude to the outside of the body, and therefore the abdomen and back protrude to the outside of the body in a region overlapping the extension in the thickness direction (hereinafter referred to as an extension region) than in a region overlapping the absorbent core in the thickness direction (hereinafter referred to as a core region). The thickness of the extension region is smaller than the thickness of the core region by an amount that does not have an absorbent core. In the case where the width of the body surrounding region is fixed, the thinner the thickness is, the lower the wearing pressure is, and therefore the wearing pressure of the extended region is lower than the wearing pressure of the core region. The extension portion overlaps the central low-contraction region having a low contraction force in the thickness direction, so that the extension region having a lower wearing pressure and not being strongly tightened can be arranged in the portion protruding from the abdomen and back than the core region, and the wearing feeling of the wearer can be improved.

According to a preferred embodiment, the central low-shrinkage region overlaps with a region outside the outer edge of the extension in the front-rear direction in the thickness direction. The abdomen and the back protrude further outward in the body than the extension region in a region (hereinafter referred to as an outer region) located further outward in the front-rear direction than the outer edge of the extension portion. The thickness of the outer region is thinner than the thickness of the extension region by the amount without the extension portion, and therefore the wearing pressure of the outer region is lower than the wearing pressure of the extension region. Further, since the outer region overlaps the central low-contraction region having a low contraction force in the thickness direction, the outer region, which is less in wearing pressure and is not strongly tightened, can be disposed at a portion protruding from the abdomen and the back than the extension region, and the wearing feeling of the wearer can be further improved.

The absorbent article of another embodiment has a front-back direction, a width direction, a thickness direction, a body surrounding region, a crotch region, an absorbent core, and a waist elastic member, wherein the width direction is orthogonal to the front-back direction, the body surrounding region is composed of a 1 st body surrounding region and a 2 nd body surrounding region, the crotch region is sandwiched between the 1 st body surrounding region and the 2 nd body surrounding region in the front-back direction, the absorbent core contains an absorbent material, and the waist elastic member is arranged in a state of extending in the width direction in the 1 st body surrounding region. A central low-shrinkage region and side-shrinkage regions are provided, the central low-shrinkage region crossing a widthwise center of the absorbent article in the 1 st body-surrounding region, the side-shrinkage regions being a pair, and being adjacent to both outer sides of the central low-shrinkage region in the widthwise direction. The central low shrinkage region has a lower shrinkage force in the width direction than the side shrinkage regions. The central low-shrinkage region has a minimum width and a maximum width, and the maximum width is located outside the minimum width in the front-rear direction. In the width direction, a maximum side edge, which is a side edge of the central low-shrinkage region, is located outside an inner edge of the front-rear joint portion at the maximum width position. With this configuration, both the function of retaining excrement and the feeling of wearing by the wearer can be achieved.

According to a preferred embodiment, the maximum side edge of the central low shrinkage region is disposed outside the side edge of the absorbent core in the width direction. Thus, at least a part of the side contracted region is not disposed on the inner side in the width direction than the side edges of the absorbent core, and therefore the absorbent core can be made less likely to stretch on the inner side in the width direction. As a result, the absorbent core is less likely to contract in the width direction, and therefore the absorbent area of the absorbent core can be ensured, and leakage of excrement can be suppressed.

According to a preferred embodiment, the pair of leakage preventing beads has a width joint portion which is located outside the rising portion in the width direction and which is joined so as not to rise toward the skin surface side, and the maximum side edge of the central low shrinkage region is located outside the inner side edge of the width joint portion in the width direction. Thus, at least a part of the side shrinkage region is not disposed further inward in the width direction than the inner edge of the width-joined portion, and therefore the width-joined portion can be made less likely to stretch inward in the width direction. Since the inner edge of the width joint portion serves as a base point for the rising of the rising portion, the rising portion is less likely to stretch inward in the width direction along with the width joint portion. As a result, the excrement is easily absorbed by the absorbent core before reaching the standing portion, and leakage of the excrement can be suppressed.

According to a preferred embodiment, the absorbent article has an absorbent main body, the absorbent main body has the absorbent core, the absorbent main body extends from the crotch region to the 1 st body peripheral region, and the maximum side edge of the central low shrinkage region is located outside the side edge of the absorbent main body in the width direction. Thus, at least a part of the side contracted region is not disposed further inward in the width direction than the inner edge of the absorbent main body, and therefore the absorbent main body can be made less likely to stretch inward in the width direction. The absorbent main body is less likely to contract in the width direction and is easily maintained in a wide state. As a result, the area for holding the excrement can be ensured.

According to a preferred embodiment, the absorbent article includes leg elastic members, and the leg elastic members are disposed in a state of being elongated in the front-rear direction at positions outside the width direction of the absorbent core at least in the crotch region, and the maximum side edges of the central low-shrinkage region are positioned outside the leg elastic members in the width direction. The leg elastic members contract in the front-rear direction, so that the region where the leg elastic members are disposed (so-called leg gathers) can be made to follow the leg circumference of the wearer, and leakage of excrement to the outside can be prevented. Here, since the maximum side edge of the central low-contraction region is located on the outer side in the width direction than the leg elastic member, at least a part of the side-contraction region is not disposed on the inner side in the width direction than the leg elastic member, and therefore the leg elastic member can be made less likely to stretch on the inner side in the width direction. As a result, the position of the leg gathers in the width direction can be maintained, and the area of the holding area for holding excrement can be maintained.

According to a preferred embodiment, the absorbent article includes a leg elastic member, and the leg elastic member is disposed in a state of being elongated in the front-rear direction at a position outside the absorbent core in the width direction at least in the crotch region, and a minimum side edge, which is a side edge of the central low-contraction region at the position of the minimum width in the width direction, is located inside the leg elastic member. Thereby, the leg elastic members are brought closer to the wearer's body side by contraction of the side contraction regions. In the vicinity of the leg elastic members, the gap between the absorbent article and the wearer's body is reduced, and leakage of excrement can be suppressed.

According to a preferred embodiment, a minimum side edge, which is a side edge of the central low-shrinkage region at the position of the minimum width in the width direction, is located outside the side edge of the absorbent core. Accordingly, all the side contracted regions are not disposed on the inner side in the width direction than the side edges of the absorbent core, and therefore the absorbent core can be made less likely to stretch on the inner side in the width direction. As a result, the absorbent core is less likely to contract in the width direction, and therefore the absorbent area of the absorbent core can be ensured, and leakage of excrement can be suppressed.

According to a preferred embodiment, a minimum side edge, which is a side edge of the central low-shrinkage region at the position of the minimum width in the width direction, is located inside the side edge of the absorbent core. The side edges of the absorbent core are brought closer to the body side of the wearer by contraction of the side contracted regions. 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.

According to a preferred embodiment, the waist elastic member includes a continuous elastic member continuously extending from one end portion to the other end portion of the 1 st body peripheral region at a position on the inner side in the front-rear direction than the central low-contraction region. The wearer wears the absorbent article such that the continuous elastic member is positioned adjacent to the ilium of the wearer, thereby enabling the 1 st body peripheral region to be continuously abutted in the width direction. Here, since the viscera, fat, and the like existing on the inner side of the ilium are less likely to be compressed, the wearer is less likely to feel uncomfortable even if the 1 st body surrounding area is brought into close contact with the wearer's body in the vicinity of the ilium. On the other hand, the wearer wears the absorbent article such that the continuous elastic member is positioned in the vicinity of the wearer's ilium, and the central low-contraction region is disposed in a region above the ilium, that is, in a region with an increased circumference of the body circumference. Therefore, in the portion where the circumference of the body is long and the wearing sensation is liable to be deteriorated, the region which does not strongly tighten the body of the wearer can be arranged long, and the wearing sensation of the wearer can be improved.

According to a preferred embodiment, a strand-side (japanese: strand-side) low-shrinkage region and a strand-side-shrinkage region are provided, the strand-side low-shrinkage region crossing the width center at a position on the inner side in the front-rear direction of the continuous elastic member in the 1 st body peripheral region, the strand-side-shrinkage region being a pair, and being adjacent to both outer sides of the strand-side low-shrinkage region in the width direction at a position on the inner side in the front-rear direction of the continuous elastic member. The widthwise shrinkage force of the strand side low shrinkage region is lower than the widthwise shrinkage force of the strand side shrinkage region. The strand-side low shrinkage region overlaps the absorbent core in the thickness direction. Since the portion of the absorbent core overlapping the low-shrinkage region on the strand side with low shrinkage force in the thickness direction is less likely to shrink in the width direction, the absorption area of the absorbent core can be ensured, and leakage of excrement can be suppressed.

According to a preferred embodiment, the side edges of the absorbent core and the strand side contracted regions overlap in the thickness direction. Thus, the contraction of the strand side contraction region causes a force to be applied to the side edges of the absorbent core outward in the width direction, and the absorbent core is easily stretched outward in the width direction. As a result, the side edges of the absorbent core are stretched outward in the width direction, and the absorbent core is pulled outward in the width direction. The absorption area of the absorbent core can be ensured, and leakage of excrement can be suppressed.

According to a preferred embodiment, the absorbent core has a waist low basis weight portion having a lower basis weight than the surrounding area in the 1 st body peripheral region, and the inner edge of the strand side gather region is located outside the side edge of the waist low basis weight portion in the width direction. The low basis weight waist portion tends to shrink in the width direction because it has lower rigidity than the surrounding area. Here, the inner edge of the thigh side contraction region is located at the outer side in the width direction than the side edge of the waist weight portion. Therefore, even if the leg side portion contraction region having a stronger contraction force than the leg side portion contraction region contracts in the width direction, the force that contracts the waist portion low basis weight portion in the width direction does not act on the waist portion low basis weight portion. Thus, the waist portion weight portion having a low basis weight is less likely to contract in the width direction, and therefore the absorption area of the absorbent core can be ensured, and leakage of excrement can be suppressed.

According to a preferred embodiment, the absorbent core has a slit extending in the front-rear direction in the crotch region, and the inner edge of the strand side gather region is located outside the slit in the width direction. The slits of the absorbent core are less rigid than the surroundings, and therefore tend to collapse in the width direction. Here, the inner edge of the strand side contraction region is located outside the slit of the core in the width direction. Therefore, even if the strand side shrinkage region having a stronger shrinkage force than the strand side shrinkage region shrinks in the width direction, the force that shrinks the slit in the width direction does not act on the slit. Thus, the slit is less likely to collapse in the width direction. When the slit is not flattened in the width direction, a difference in rigidity occurs in the width direction due to the slit, and therefore the absorbent core can be easily bent in the width direction with the slit as a base point. By bending the absorbent core in the width direction, the absorbent core can be easily accommodated in the crotch region, and thus the wearing sensation can be improved.

According to a preferred embodiment, the 1 st body surrounding region is disposed on the abdomen side of the wearer, the width of the central low shrinkage region is widened toward the outside in the front-rear direction, and the inclination of the length in the front-rear direction with respect to the length in the width direction from the minimum side edge, which is the side edge of the central low shrinkage region at the position of the minimum width, to the maximum side edge of the central low shrinkage region is smaller than the inclination of the length in the front-rear direction with respect to the length in the width direction from the side edge located outermost in the front-rear direction of the thigh side low shrinkage region to the minimum side edge of the central low shrinkage region. In the case of a child of a short length and of a low month age, the change in the circumference of the body on the abdomen side in the front-rear direction is large as compared with that of an adult. Thus, at a position on the outer side in the anterior-posterior direction than the ilium, the circumference of the abdominal girth starts to increase according to the distance near the ilium. Then, by reducing the inclination of the side edges of the central low-shrinkage region (inclination from the smallest side edge to the largest side edge), the width of the central low-shrinkage region can be widened early in accordance with the circumference of the body circumference of the young child of low month age. Thus, the region which does not strongly tighten the body can be arranged in correspondence with the circumference of the body circumference of the child with low age, and thus the wearing feeling of the child with low age can be improved.

According to a preferred embodiment, the 1 st body surrounding region is disposed on the abdomen side of the wearer, the 2 nd body surrounding region is disposed on the back side of the wearer, a back side low shrinkage region and a back side shrinkage region are provided, the back side low shrinkage region crosses the width center in the 2 nd body surrounding region, the back side shrinkage regions are in a pair, the back side low shrinkage region is adjacent to both outer sides of the back side low shrinkage region, the shrinkage force in the width direction of the back side low shrinkage region is lower than the shrinkage force in the width direction of the back side shrinkage region, the back side low shrinkage region overlaps the absorbent core in the thickness direction, and the width of the back side low shrinkage region is wider than the width of the thigh side low shrinkage region. The width of the back side low shrinkage region is wider than the width of the thigh side low shrinkage region, and therefore the back side absorbent core is less likely to shrink in the width direction than the abdomen side absorbent core. This ensures a large absorption area of the back side absorbent core, and ensures a large toilet room. As a result, leakage of excrement can be suppressed.

According to a preferred embodiment, the absorbent article has an absorbent main body having the absorbent core and extending from the crotch region to the 1 st body peripheral region, the 1 st body peripheral region being disposed on the abdomen side of the wearer, the 2 nd body peripheral region being disposed on the back side of the wearer, a back side low shrinkage region and a back side shrinkage region being provided, the back side low shrinkage region crossing the width center in the 2 nd body peripheral region, the back side shrinkage regions being a pair, being adjacent to both outer sides of the back side low shrinkage region in the width direction, the shrinkage force in the width direction of the back side low shrinkage region being lower than the shrinkage force in the width direction of the back side shrinkage region, the inner side edge of the thigh side shrinkage region being located on the inner side than the side edge of the absorbent main body in the width direction, and the inner side edge of the thigh side shrinkage region being located on the inner side than the inner side edge of the thigh side shrinkage region in the width direction. The back side of the absorbent body is touched by the arms of the caretaker by the wearer being held or touched by the floor by the sleeping position, and therefore the back side absorbent body is more likely to deviate in the width direction than the abdomen side absorbent body. By positioning the inner edge of the back-side contracted region further inward than the inner edge of the thigh-side contracted region, the expansion/contraction force applied to the back-side contracted region of the absorbent body when the absorbent body is displaced in the width direction can be made greater than the expansion/contraction force of the thigh-side contracted region. Accordingly, the expansion/contraction force of the back side portion contraction region becomes larger in accordance with the displacement of the absorbent body in the width direction, and therefore, in particular, the back side absorbent body can be made less likely to be displaced in the width direction.

(2) Overall outline structure of absorbent article

The absorbent article 1 according to the embodiment will be described with reference to fig. 1 to 11. The absorbent article 1 is, for example, a pants-type disposable diaper, a belt-type disposable diaper, a pants-type sanitary napkin, or the like. The absorbent article 1 of the embodiment is a pants-type disposable diaper. In fig. 11, "BL" represents a line of the body of the wearer. It should be noted that the drawings are schematic, and the ratio of the respective dimensions and the like sometimes differ from reality. In the schematic cross-sectional view, the members are sometimes separated in the thickness direction T for convenience of explanation, but are connected in the thickness direction T in an actual product.

As shown in fig. 1, the absorbent article 1 has a front-rear direction L and a width direction W orthogonal to the front-rear direction L. The front-rear direction L is defined by the direction extending to the front side and the rear side of the body. In other words, the front-rear direction L is a direction extending in the front-rear direction on the unfolded absorbent article 1. The absorbent article 1 has a thickness direction T orthogonal to the front-rear direction L and the width direction W. The thickness direction T extends toward a skin surface side T1 facing the wearer side and a non-skin surface side T2 opposite to the skin surface side.

The absorbent article 1 has a body surrounding region and a crotch region S3, the body surrounding region is constituted by a 1 st body surrounding region and a 2 nd body surrounding region, and the crotch region S3 is sandwiched between the 1 st body surrounding region and the 2 nd body surrounding region in the front-rear direction. In the present embodiment, the 1 st body surrounding region is the front body surrounding region S1 disposed on the abdomen side of the wearer. The front body surrounding region S1 is a region opposed to the front body surrounding portion (abdomen) of the wearer. The 2 nd body surrounding area is a back body surrounding area S2 arranged on the back side of the wearer. The back body surrounding area S2 is an area opposed to the back body surrounding portion (back) of the wearer. The crotch region S3 is located in the crotch of the wearer and is a region disposed between the front body surrounding region S1 and the rear body surrounding region S2.

The absorbent article 1 may have an absorbent main body 20 and an outer body 50. The absorbent main body 20 may be configured independently of the outer body 50. The absorbent main body 20 is disposed 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 toward the front body surrounding region S1, and may extend in the front-rear direction L from the crotch region S3 toward the rear body surrounding region S2. The absorbent main body 20 may have an extension 24, and the extension 24 may extend to a position outside the outer end edge in the front-rear direction L of the absorbent core 31 in the front-rear direction L. The absorbent main body 20 may overlap the outer body 50 in the thickness direction T on the front body surrounding region S1 and the rear body surrounding region S2. The exterior body 50 is disposed at least in the body surrounding area. The outer body 50 is composed of a front outer body 50A disposed in the front body surrounding region S1 and a rear outer body 50B disposed in the rear body surrounding region S2.

As shown in fig. 1, the absorbent article 1 may have side joining portions 16, and the side joining portions 16 join an outer side portion in the width direction W of the front outer body 50A and an outer side portion in the width direction W of the rear outer body 50B, which are arranged in the front outer body surrounding region S1. The side joint 16 is defined by a portion where the outer side of the front outer body 50A and the outer side of the rear outer body 50B are joined to each other. The side joint 16 may extend in the front-rear direction L in the front outer body 50A and the rear outer body 50B, respectively. In a state where the side joint portions 16 are formed, a waist opening 17 through which the body of the wearer passes and a pair of leg hole openings 18 through which the legs of the wearer are respectively inserted are formed in the absorbent article 1. The waist opening 17 may be defined by a front end edge S1F of the front body surrounding region S1 and a rear end edge S2R of the rear body surrounding region S2.

In the pants-type absorbent article 1, the crotch region S3 may be defined by the inner edge of the side joint 16 in the front-rear direction L. The boundary between the front body surrounding region S1 and the crotch region S3 may be defined by the rear end edge 16R of the side joint 16 at the front body surrounding region S1. The boundary between the back body surrounding region S2 and the crotch region S3 may be defined by the front end edge 16F of the side joint 16 at the back body surrounding region S2. The crotch region S3 may be defined by a region where the leg hole opening 18 is provided. The leg hole 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 body surrounding region S1 and the crotch region S3 may be defined by the front edge of the leg hole opening 18. The boundary between the back body surrounding region S2 and the crotch region S3 may be defined by the rear end edge of the leg hole opening 18.

In the present specification, the outer side portion refers to a portion that occupies a constant range in the width direction W including the outer edge in the width direction W, and the outer edge refers to the outer edge in the width direction W. The inner side in the present specification means a portion that occupies a constant range in the width direction W including an inner edge in the width direction W, and the inner edge means an inner edge in the width direction W. In the present specification, the front end portion and the rear end portion are portions that occupy a predetermined range in the front-rear direction L including edges in the front-rear direction L, and the front end edge and the rear end edge are edges in the front-rear direction L. The outer end portion includes a front end portion and a rear end portion, and the outer end edge includes a front end edge and a rear end edge.

The absorbent main body 20 may have an absorber 30, a front sheet 41, a back sheet 42, and side sheets 47. The absorbent body 30 has at least an absorbent core 31 containing an absorbent material. The absorbent core 31 (absorbent material) is composed of, for example, at least one of pulp and a superabsorbent polymer. The absorbent body 30 may have a core wrap sheet 32 covering the absorbent core 31. The core wrap 32 is in contact with 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 sheet 32 may be folded back at the side of the absorbent core 31, thereby wrapping the absorbent core 31. The core wrap 32 may be made of, for example, paper towel, nonwoven fabric, or the like.

The absorbent core 31 may have a waist low weight-per-area portion 31L having a lower weight-per-area than the surrounding waist in the precursor zone S1. The waist low basis weight portion 31L may have a rear end edge 31LR in the front body surrounding region S1. The absorbent material of the waist low weight-per-area portion 31L has a lower basis weight than the absorbent material of the portion of the absorbent core 31 having a higher basis weight than the waist low weight-per-area portion 31L (i.e., the absorbent core 31 rearward of the rear end edge 31LR of the waist low weight-per-area portion 31L). In the embodiment, the absorbent material of the waist low weight portion 31L has a weight per unit area of 0. In this case, the weight per unit area of the absorbent material in the waist low weight portion 31L may be substantially 0, and the absorbent material in the absorbent core 31 around the waist low weight portion 31L may overflow into the waist low weight portion 31L. The absorbent material of the waist low basis weight portion 31L may have a basis weight higher than 0. The absorbent core 31 may have a slit 35 extending in the front-rear direction L in the crotch region S3. The slits 35 are disposed in a pair outside the width direction W than the width center WC, which is the center of the absorbent core 31 in the width direction W.

The front sheet 41 is positioned closer to the skin surface side T1 than the absorber 30. The front sheet 41 is opposed to the skin of the wearer. The front sheet 41 may be made of, for example, a nonwoven fabric as long as it has liquid permeability. The back sheet 42 is positioned closer to the non-skin side T2 than the absorber 30. The back sheet 42 may be a film, for example, as long as it has liquid impermeability.

The side sheet 47 is disposed outside the width direction W than the width center WC, which is the center of the absorbent core 31 in the width direction W. The side panels 47 are opposite the skin of the wearer. The side sheet 47 may extend in the width direction W so as to cross the center of the width direction W of the absorbent article 1 at a position closer to the non-skin surface side T2 than the absorbent core 31. The side sheet 47 may be disposed on the non-skin surface side T2 of the back sheet 42 in the region overlapping the absorber 30 in the thickness direction T. The side sheet 47 is made of, for example, nonwoven fabric. The side sheet 47 may have a plurality of folds (1 st fold FL1, 2 nd fold FL2, 3 rd fold FL 3) along the front-back direction L. The side sheet 47 may have a 1 st portion 471 extending from the center of the absorbent main body 20 in the width direction W to the outside of the 1 st fold FL1 in the width direction W at a position closer to the non-skin surface side T2 than the absorbent body 30. The side pieces 47 may also constitute side edges of the absorbent main body 20. The side sheet 47 may have a 2 nd portion 472 extending from the 1 st fold FL1 to the 2 nd fold FL2 inward in the width direction W. In addition, the side sheet 47 may have a 3 rd portion 473 extending from the 2 nd crease FL2 to the 3 rd crease FL3 outward in the width direction W. In addition, the side sheet 47 may have a 4 th portion 474 extending inward in the width direction W from the 3 rd fold line FL 3. The 1 st part 471, the 4 th part 474, the 3 rd part 473 and the 2 nd part 472 are arranged in this order from the non-skin surface side T2 to the skin surface side T1.

The outer body 50 (front outer body 50A and rear outer body 50B) is disposed closer to the non-skin surface side T2 than the absorbent main body 20. The outer case 50 may be constituted by a plurality of sheet members. The outer body 50 may have a sheet member disposed closer to the skin surface side T1 than the absorbent main body 20. The outer body 50 further includes a waist elastic member 55.

The front outer body 50A may have a 1 st front side sheet 51F and a 2 nd front side sheet 52F disposed closer to the skin surface side T1 than the 1 st front side sheet 51F. The 1 st front side sheet 51F may be disposed closer to the non-skin surface side T2 than the waist elastic member 55. The 2 nd front side sheet 52F may be disposed closer to the skin surface side T1 than the waist elastic member 55. The portion of the 1 st front side sheet 51F on the outside in the front-rear direction L may be folded back toward the skin surface side T1. The 2 nd front side sheet 52F may be disposed closer to the non-skin surface side T2 than the portion of the 1 st front side sheet 51F folded back to the skin surface side T1. The 1 st front side sheet 51F and the 2 nd front side sheet 52F may be made of nonwoven fabric, for example.

The rear outer body 50B may be separated from the front outer body 50A in the front-rear direction L. The rear outer body 50B may have a 1 st rear side sheet 51R and a 2 nd rear side sheet 52R disposed closer to the skin surface side T1 than the 1 st rear side sheet 51R. The 1 st back side sheet 51R may be disposed closer to the non-skin surface side T2 than the waist elastic member 55. The 2 nd back side sheet 52R may be disposed closer to the skin surface side T1 than the waist elastic member 55. The 1 st back side sheet 51R and the 2 nd back side sheet 52R may be made of, for example, nonwoven fabric.

The waist elastic member 55 is disposed in a body surrounding region (the front body surrounding region S1 or the rear body surrounding region S2) in a state of being elongated in the width direction W. The waist elastic member 55 may be composed of a continuous elastic member 55C and a discontinuous elastic member 55N. The continuous elastic member 55C extends continuously from one outer side portion of the body surrounding region (the front body surrounding region S1 or the rear body surrounding region S2) to the other outer side portion in the width direction W. The discontinuous elastic member 55N does not extend continuously in the width direction W at least in the center of the width direction W of the body surrounding region. The center in the width direction W of the body surrounding region is a region from at least one outer edge to the other outer edge of the absorbent core 31. The continuous elastic member 55C may have a front continuous elastic member 55CF disposed in the front body surrounding region S1 and a rear continuous elastic member 55CR disposed in the rear body surrounding region S2. The discontinuous elastic member 55N may have a front discontinuous elastic member 55NF disposed in the front body surrounding region S1 and a rear discontinuous elastic member 55NR disposed in the rear body surrounding region S2.

The waist elastic member 55 may be constituted by a linear elastic member 55L which is a linear or rope-like elastic member extending in the width direction W, or may be constituted by a stretchable sheet 55S which is a sheet-like elastic member. The linear elastic member 55L may extend linearly in the width direction W. The length of the linear elastic member 55L in the front-rear direction L (i.e., the thickness of the elastic member) may be, for example, less than 5mm. The length of the stretchable sheet 55S in the front-rear direction L may be, for example, 5mm or more. In the embodiment, the waist elastic member 55 is constituted by a linear elastic member 55L and a stretchable sheet 55S. Specifically, the continuous elastic member 55C is constituted by the linear elastic member 55L and the stretchable piece 55S, and the discontinuous elastic member 55N is constituted by the linear elastic member 55L. The expansion and contraction sheet 55S constitutes a continuous elastic member 55C. The stretchable panel 55S may be disposed between the 1 st front side panel 51F and the 2 nd front side panel 52F in the thickness direction T. The stretchable sheet 55S may be disposed closer to the skin surface side T1 than the linear elastic member 55L.

The front continuous elastic member 55CF constituted by the linear elastic member 55L may have the 1 st continuous elastic member 55C1 and the 2 nd continuous elastic member 55C2. The 1 st continuous elastic member 55C1 extends continuously from one end portion to the other end portion of the precursor surrounding area S1 at a position inside the central low contraction area LER1 described later in the front-rear direction L. The 2 nd continuous elastic member 55C2 extends continuously from one end portion to the other end portion of the precursor surrounding area S1 at a position outside the central low contraction area LER1 in the front-rear direction L. The 1 st continuous elastic member 55C1 may be disposed rearward from the front end edge 16F of the side joint 16 at the front body surrounding region S1 by 5% to 20% of the total length (from the front end edge to the rear end edge of the absorbent article 1) in the front-rear direction L of the absorbent article 1. In the front body surrounding region S1, the 1 st continuous elastic member 55C1 may be disposed in front of 20% to 90%, preferably 40% to 70%, more preferably 45% to 65% 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.

The front discontinuous elastic member 55NF constituted by the linear elastic member 55L may have the 1 st discontinuous elastic member 55N1 and the 2 nd discontinuous elastic member 55N2. The 1 st discontinuous elastic member 55N1 is constituted by a plurality of linear elastic members 55L arranged at intervals in the front-rear direction L. At least a part of the plurality of linear elastic members 55L (1 st discontinuous elastic member 55N 1) has different lengths in the width direction W, that is, different lengths extending continuously from the outer side portion of the precursor peripheral region S1 to the inner side in the width direction W. The 2 nd discontinuous elastic member 55N2 is disposed further inward in the front-rear direction L than the 1 st continuous elastic member 55C 1. The 1 st discontinuous elastic member 55N1 may extend linearly from the side joint 16 to the inner side edge of the side contracted region ER1 described later. Similarly, the 2 nd discontinuous elastic member 55N2 may extend linearly from the side joint 16 to the inner side edge of the below-described strand-side contracted region ER 2.

The 1 st discontinuous elastic member 55N1 is disposed at least in the side contracted region ER1 described later. The 1 st discontinuous elastic member 55N1 may be discontinuously disposed in the central low shrinkage region LER1. The 2 nd discontinuous elastic member 55N2 is disposed at least in the below-described strand side contraction region ER2. The 2 nd discontinuous elastic member 55N2 may be discontinuously disposed in the strand side low shrinkage region LER2. The rear discontinuous elastic member 55NR is disposed at least in the back side contracted region ERR described later. The rear discontinuous elastic member 55NR may be discontinuously disposed in the backside low-contraction zone LERR.

The absorbent article 1 may have leg gathers 70. The leg gathers 70 are gathers provided outside the absorbent core 31 in the width direction W. The leg gathers 70 may be provided at the leg hole opening 18 and around the leg hole opening 18. Further, the leakage preventing bead 80 may be provided closer to the non-skin surface side T2.

The leg gathers 70 are pulled up toward the wearer's body side by contraction of the leg elastic members 75. The leg gathers 70 have leg elastic members 75. The leg elastic members 75 are disposed in a state of being stretched in the front-rear direction L at least in the crotch region S3, at positions outside the absorbent core 31 in the width direction W. The leg elastic members 75 extend in the front-rear direction L at least in the crotch region S3. The leg elastic member 75 may extend to the front body surrounding region S1 or to the rear body surrounding region S2. The leg elastic member 75 may be disposed on the side sheet 47. The leg elastic member 75 may be arranged between the side sheet 47 and the back sheet 42 in the thickness direction T. Further, the leg elastic members 75 may be arranged to be sandwiched by the side pieces 47 in the thickness direction T. The leg elastic members 75 (for example, the leg elastic members 75 disposed on the outermost side in the width direction W) of a part of the plurality of leg elastic members 75 may be disposed so as to be sandwiched by the side pieces 47 in the thickness direction T. The leg elastic member 75 may be fixed to the side sheet 47 or the back sheet 42. Thus, the leg gathers 70 may be constituted by the side sheet 47 in addition to the leg elastic members 75. The leg gathers 70 may also be formed of leg elastic members 75, side panels 47, and back panel 42. The leg elastic member 75 may be disposed on the other sheet member (the sheet member other than the back sheet 42 and the side sheet 47) disposed outside the absorbent core 31 in the width direction W in the thickness direction T.

The absorbent article 1 has a pair of leakage preventing cuffs 80. The pair of leakage preventing cuffs 80 extend in the front-rear direction L at least in the crotch region and are disposed on both sides of the width center WC. The pair of leakage preventing cuffs 80 includes a rising portion 82 and a joining portion 84, the rising portion 82 can rise toward the skin surface side T1 by contraction in the front-rear direction L, and the joining portion 84 cannot rise toward the skin surface side T1.

The rising portion 82 can be raised by contraction of the leg side elastic member 85. The leg side elastic members 85 are disposed on the side pieces 47 in a state of being elongated in the front-rear direction L. The leg side elastic member 85 may be sandwiched by the side pieces 47. May be disposed between the 2 nd portion 472 and the 3 rd portion 473 of the side panel 47. The leg side elastic member 85 may be secured to at least one of the 2 nd portion 472 and the 3 rd portion 473 of the side panel 47. The leg side elastic member 85 may be constituted by a single elastic member or a plurality of elastic members arranged at intervals in the width direction W. In this embodiment, the elastic member is composed of two elastic members. The leg side elastic member 85 may be constituted by a linear or string-like elastic member extending in the front-rear direction L.

The joint 84 has a front-rear joint 841 and a width joint 842. The front-rear bonding portion 841 is located outside the rising portion 82 in the front-rear direction L, and cannot be bonded to the skin surface side T1 in a rising manner. The front-rear bonding portion 841 has an inner end edge 841I which is an inner end edge in the front-rear direction L. The front-rear bonding portion 841 has an inner edge EI which is an inner side edge in the width direction W. The width joint 842 is located outside the rising portion 82 in the width direction W and is not joined so as to rise toward the skin surface side T1. The width joint 842 has an inner edge 842EI which is an inner edge in the width direction W. The rising portion 82 can rise in the front-rear direction L with the inner edge 841I of the front-rear joint 841 as a base point, and can rise in the width direction W with the inner edge 842EI of the width joint 842 as a base point.

(3) Low shrinkage region and a pair of shrinkage regions

Illustrating a low shrink region and a pair of shrink regions. 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 adjacent shrinkage regions in the width direction W. In an embodiment, the low shrinkage region has a central low shrinkage region LER1, a thigh side low shrinkage region LER2, and a back side low shrinkage region LER, and the pair of shrinkage regions has a pair of side shrinkage regions ER1, a pair of thigh side shrinkage regions ER2, and a back side shrinkage region ERR.

The central low shrinkage region LER1 is a region that spans the width center WC, which is the center of the width direction W of the absorbent article 1, in the precursor zone S1. The pair of side contracted regions ER1 are regions adjacent to both outer sides of the central low contracted region LER1 in the width direction W. The pair of side contracted regions ER1 may extend linearly in the width direction from the inner edge of the side contracted region ER1 to the side joint 16, or may extend to a position outside the side joint 16 in the width direction W. The contraction force in the width direction W of the central low contraction region LER1 is lower than the contraction force in the width direction W of the side contraction regions ER 1. Likewise, the strand side low shrinkage region LER2 spans the width center WC at the precursor peripheral region S1. The pair of strand side shrinkage regions ER2 are adjacent to both outer sides of the strand side low shrinkage region LER2 in the width direction W. The pair of thigh side contraction regions ER2 may extend linearly in the width direction from the inner edge of the thigh side contraction region ER2 to the side joint 16, or may extend to a position outside the side joint 16 in the width direction W. The shrinkage force in the width direction W of the strand-side low shrinkage region LER2 is lower than the shrinkage force in the width direction W of the strand-side shrinkage region ER 2. The central low shrinkage region LER1 may be located outside the strand-side low shrinkage region LER2 in the front-rear direction L. In addition, the back side low shrinkage region LERR spans the width center WC in the back body surrounding region S2. The pair of back side shrinkage regions ERR are adjacent to both outer sides of the back side low shrinkage region LERR in the width direction W. The pair of back side contracted regions ERR may extend linearly in the width direction from the inner edges of the back side contracted regions ERR to the side joint portions 16, or may extend to positions outside the side joint portions 16 in the width direction W. The contraction force in the width direction W of the back-side low contraction region LERR is lower than the contraction force in the width direction W of the back-side contraction region ERR.

For setting the low shrinkage region, for example, the following method 1 or 2 can be used. In the method 1, the discontinuous elastic member 55N may not be arranged in an elongated state, so that the contraction force in the width direction W of the low contraction region is lower than the contraction force in the width direction W of the pair of contraction regions. For example, in the region where the discontinuous elastic member 55N is arranged in the stretched state, an adhesive (for example, a Hot Melt Adhesive (HMA)) for fixing the discontinuous elastic member 55N is arranged, and in the low shrinkage region, an adhesive for fixing the discontinuous elastic member 55N is not arranged. Thus, in the region where the adhesive is disposed, the discontinuous elastic member 55N is fixed in an elongated state. In the region where the adhesive is not disposed and the region where the adhesive is disposed in the width direction W, the discontinuous elastic member 55N is cut in the region because the stretched state of the discontinuous elastic member 55N is maintained, and the cut discontinuous elastic member 55N is contracted. Thus, the discontinuous elastic member 55N having contractility (i.e., in an extended state) is not disposed in the low contraction region. Thus, in the low shrinkage region, the discontinuous elastic member 55N does not extend continuously in the width direction W. In this case, the contraction force in the width direction W of the low contraction region is 0. In addition, in the case where the low shrinkage region is provided using the above-described method 1, the discontinuous elastic member 55N may have a fixed portion and a non-fixed portion. The fixed portion is a portion arranged in an elongated state. The non-fixed portion is a portion that is not fixed in an elongated state but exists in a natural state.

In the method 2, the waist elastic member 55 fixed to the low shrinkage region may be cut (diced) at a plurality of places to form the discontinuous elastic member 55N, so that the shrinkage force in the width direction W of the low shrinkage region is lower than the shrinkage force in the width direction W of the pair of shrinkage regions. Thereby, 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 an extended state, the contraction force of the discontinuous elastic member 55N decreases. Further, since the discontinuous elastic member 55N having the residual contraction force is arranged (fixed) in the low contraction region set by the method 2 described above, the contraction force of the low contraction region set by the method 2 is larger than 0, and thus larger than the contraction force of the low contraction region set by the method 1.

The low shrinkage region and the pair of shrinkage regions may be defined by measuring the shrinkage force of each region. The "contractility" of each region can be measured by the following method. When measuring the contraction force of each region, a sample to be measured is prepared. The two ends of the sample were held by chucks (holding tools) of the tensile tester. At this time, the distance between chucks was set to 100mm. Next, one of the chucks is moved while being fixed in the width direction W, so that the distance between the chucks is changed. The moving speed of the chuck at this time was set to 300mm/min. During the movement of the chuck, the stress applied to the chuck was measured, and the stress (N) obtained from the elongated state in a state of 60% (a certain width) was defined as "shrinkage force".

In addition, the low contraction zone and the pair of contraction zones may be defined by the arrangement of the waist elastic member 55. Specifically, the boundary between the low shrinkage region and the width direction W of the shrinkage region, that is, the side edge of the low shrinkage region and the inner edge of the shrinkage region can be defined by the inner edge of the discontinuous elastic member 55N that extends continuously from the outer side of the outer body 50 to the inner side in the width direction W. In the case where the low shrinkage region is provided using the method 1, the side edges of the low shrinkage region and the inner side edges of the shrinkage region may be inner side edges of the fixed portion of the discontinuous elastic member 55N. When the plurality of discontinuous elastic members 55N are arranged at intervals in the front-rear direction L, the side edges of the low shrinkage region and the inner edges of the shrinkage region are defined by straight lines connecting the inner edges of the discontinuous elastic members 55N adjacent in the front-rear direction L. The outer end edge of the contracted region is the position of the discontinuous elastic member 55N that is outermost in the front-rear direction L, and the inner end edge of the contracted region is the position of the discontinuous elastic member 55N that is innermost in the front-rear direction L. The outer edge of the low-shrinkage region is defined by a virtual line that is connected to the inner edge of the outermost discontinuous elastic member 55N adjacent to the low-shrinkage region on both sides in the width direction W, and the inner edge of the low-shrinkage region is defined by a virtual line that is connected to the inner edge of the innermost discontinuous elastic member 55N adjacent to the low-shrinkage region on both sides in the width direction W. In addition, in the case where the number of discontinuous elastic members 55N is 1, the outer end edge of the contracted region is the position of the outer end edge of the discontinuous elastic member 55N, and the inner end edge of the contracted region is the position of the inner end edge of the discontinuous elastic member 55N. The outer edge of the low shrinkage region is defined by a virtual line that is connected to the inner edge of the outer edge of the discontinuous elastic member 55N adjacent to the low shrinkage region on both sides in the width direction W, and the inner edge of the low shrinkage region is defined by a virtual line that is connected to the inner edge of the discontinuous elastic member 55N adjacent to the low shrinkage region on both sides in the width direction W.

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 a 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 a side edge of the central low shrinkage region LER1 at the position of the maximum width MA. As shown in fig. 4 and the like, the width of the central low shrinkage region LER1 may be widened as going to the outside in the front-rear direction L. Accordingly, the 1 st discontinuous elastic member 55N1 extending continuously from the outer side portion of the outer body 50 to the inner side in the width direction W has an inner end edge located further outward in the front-rear direction L than the 1 st discontinuous elastic member 55N 1.

(4) Relationship with pelvis

The present inventors have made intensive studies and as a result, have focused on the discovery of a configuration that combines the function of retaining excrement with the feeling of wearing by the wearer, and have completed the present invention. Specifically, as shown in fig. 8 and 9, the height of the upper edge of the ilium IB, that is, the ilium ridge IC of the wearer increases from the center portion of the abdomen side or the back side of the wearer to the side portions. Therefore, in the body surrounding area, the fat, viscera, etc. of the wearer are not covered with the ilium IB as going to the outside in the front-rear direction L, and the abdomen and back are more likely to protrude to the outside of the body. Thus, as shown in fig. 10, the longer the circumference CL of the body periphery of each of the abdomen side and the back side of the wearer is, the more the body periphery region of the absorbent article 1 is easily pulled up the body of the wearer, as going to the outside in the front-back direction L. Further, the contraction of the waist elastic member 55 makes the outer side of the body surrounding region having a longer peripheral length CL more likely to act on the front body surrounding region S1 by a force directed inward in the front-rear direction L having a shorter peripheral length CL, and particularly, the portion of the body surrounding region having a longer peripheral length CL is likely to slip off.

In the absorbent article 1 of the embodiment, a central low-shrinkage region LER1 and a pair of side-shrinkage regions ER1 are provided, 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. As a result, as shown in fig. 8, the portion of the central low-shrinkage region LER1 having the maximum width MA can cover a portion of the circumference CL longer than the portion of the minimum width MI. Thus, the portion of the central low contraction region LER1 having a smaller contraction force than the side contraction regions ER1 can be used to cover the portion of the circumference CL of the body circumference longer (i.e., the portion of the body of the wearer which is more likely to be tightened). Thus, the region where the contraction force is weak and the body of the wearer is less likely to be tightened (i.e., the central low contraction region LER 1) can be increased by the portion where the body of the wearer is more likely to be tightened, and the wearing sensation of the wearer can be improved. In addition, in the portion where the peripheral length CL of the body circumference is long, the contraction force in the width direction W is reduced, and the force from the outside to the inside in the front-rear direction L can be reduced. Thus, the portion of the body circumference having a longer circumference CL is less likely to slip off, and the wearing sensation of the wearer can be improved.

In addition, in the body surrounding area, the height of the ilium ridge IC increases from the central portion of the abdomen side or the back side to the side portion, so that when the central portion of the abdomen side or the back side is compared on the side portion of the wearer, the area covered with the ilium IB such as viscera and fat increases. Therefore, even if the side contracted region ER1 is brought into close contact with the wearer's body, the viscera, fat, etc. are not easily pressed. In the width direction W, the pair of side contracted regions ER1 are adjacent to both outer sides of the central low contracted region LER1, so that the pair of side contracted regions ER1 can be disposed closer to the side of the wearer than the central low contracted region LER1. When the pair of side contracted regions ER1 are disposed on the side of the wearer, the wearer does not feel uncomfortable even if the front body surrounding region S1 is brought into close contact with the wearer' S body by contraction of the pair of side contracted regions ER1. Therefore, the wearing sensation of the wearer can be improved.

In addition, the absorbent article 1 has a leakage preventing hem 80. The rising portion 82 of the leakage preventing bead 80 rises toward the skin surface side T1, thereby intercepting excrement and preventing side leakage of excrement. Since the rising portion 82 starts rising toward the skin surface side T1 with the inner end edge 841I of the front-rear bonding portion 841 of the leak-proof bead 80 as a base point in the front-rear direction L, a region inside the front-rear bonding portion 841I in the front-rear direction L serves as a holding region for holding excrement. Here, in the absorbent article 1, the inner edge IE of the central low shrinkage region LER1 is located outside the inner edge 841I of the front-rear bonding portion 841 in the front-rear direction L. Thus, the central low-contraction region LER1 having a contraction force weaker than that of the side contraction region ER1 can be provided at a position farther from the excretory opening of the excretory substance, which is normally located on the inner side (i.e., the crotch side) in the front-rear direction L than the holding region. In this case, the excrement can be held by the holding area, and the influence on the holding of the excrement can be suppressed as compared with the case where the central low shrinkage area LER1 is provided in the holding area. As a result, the excrement holding function can be maintained and the wearing sensation of the wearer can be improved, so that both the excrement holding function and the wearing sensation of the wearer can be achieved.

In addition, when the side portion contraction region ER1 contracts at a position inside the width direction W than the inside edge 841EI of the front and rear joining portion 841, the front and rear joining portion 841 tends to stretch inward in the width direction W. When the front-rear joining portion 841 is deviated inward in the width direction W, the standing base point of the standing portion 82 is deviated inward in the width direction W, and the area of the holding area for holding excrement is reduced. Here, in the absorbent article 1, the maximum side edge EMA of the central low shrinkage region LER1 is located outside the inner side edge 841EI of the front-rear bonding portion 841 in the width direction W. Accordingly, at least a part of the side contracted region ER1 (that is, the side contracted region ER1 located outside the maximum side edge EMA of the central low contracted region LER1 in the width direction W) is not disposed inside the inner side edge 841EI of the front-back joined portion 841 in the width direction W, and therefore the front-back joined portion 841 can be made less likely to stretch inside the width direction W. As a result, the position of the standing base point W of the standing portion 82 in the width direction can be maintained, and the area of the holding area can be maintained. This can suppress leakage of excrement and enhance the wearing sensation of the wearer, and thus can achieve both the excrement holding function and the wearing sensation of the wearer.

In the embodiment, the 1 st body surrounding region provided with the central low shrinkage region LER1 is the front body surrounding region S1, that is, is disposed on the abdomen side of the wearer. Since the height of the iliac edge IC on the ventral side is lower than that of the iliac edge IC on the dorsal side, the region covered with the iliac IB, such as viscera and fat, is smaller on the ventral side than on the dorsal side. Therefore, the abdomen is more likely to protrude to the outside of the body than the back. Then, by disposing the central low-contraction region LER1 in the abdomen of the wearer, the region strongly tightening the abdomen of the wearer can be reduced, and the wearing sensation can be improved.

In the anterior peripheral region S1, the height of the ilium ridge IC increases from the central portion to the side portions, and therefore the region covered with the ilium IB decreases toward the outer side (the waist opening 17 side) in the anterior-posterior direction L in the central portion. Therefore, the farther outward in the front-rear direction L, the more likely the body of the wearer protrudes, the longer the circumference CL of the body circumference of the wearer. In the present embodiment, the width of the central low shrinkage region LER1 becomes wider as going to the outside in the front-rear direction L. Accordingly, the width of the central low-contraction region LER1 is widened in accordance with the circumference CL of the body circumference of the wearer, and the region where the body of the wearer is not strongly tightened is increased. As a result, the wearing sensation can be improved.

In addition, as shown in fig. 7, the front-rear bonding portion 841 may overlap with the side contracted region ER1 in the thickness direction T. The front-rear bonding portion 841 is in close contact with the wearer's body due to contraction of the side contracted region ER1, and therefore, a gap is less likely to be generated between the wearer's body and the front-rear bonding portion 841. Thus, leakage of excrement passing through the gap can be suppressed.

In addition, the width of the central low shrinkage region LER1 may be widened as going to the outside in the front-rear direction L. In this case, as shown in fig. 7, the central low shrinkage region LER1 may have a wide region WR and a narrow region NR. The wide region WR extends from a position inside the outer edge 841EO of the front-rear joint 841 in the width direction W to a position outside the outer edge 841EO of the front-rear joint 841 in the width direction W. The narrow region NR is a region on the inner side of the wide region WR in the front-rear direction L. The length LW of the wide region WR in the front-rear direction L may be longer than the length LN of the narrow region NR in the front-rear direction L. The leakage preventing curl 80 extends in the front-rear direction L in the crotch region S3, and therefore the front-rear joining portion 841 is arranged in accordance with the strand width of the wearer. Thus, the length LW is longer than the length LN, and the proportion of the area of the central low-shrinkage region LER1 disposed in the region outside the position corresponding to the wearer's thigh width in the width direction W can be increased. Thus, the wearer's body is not strongly tightened over a large area in the region outside in the width direction W from the position corresponding to the wearer's crotch width, and the wearing sensation can be improved.

As shown in fig. 11, the abdomen side of the wearer is easily bent in the non-skin side T2 direction (direction away from the body of the wearer) at a portion inside the absorbent core 31 in the front-back direction L than the lower end of the abdomen due to sitting posture, forward flexion, and the like. Here, since the rigidity difference is large in the front-rear direction of the rear end edge 31LR of the waist low basis weight portion 31L, the rear end edge 31LR of the waist low basis weight portion 31L tends to become the bending base point of the absorbent core 31. As shown in fig. 11 a, the inner end 841I of the front-rear bonding portion 841 is located outside the rear end 31LR of the waist low basis weight portion 31L in the front-rear direction L, so that the inner end 841I of the front-rear bonding portion 841 is easily located outside the bending base point of the absorbent core 31 in the front-rear direction L. Thereby, the rising portion 82 can rise from the bending base point of the absorbent core 31. Therefore, the gap G is less likely to occur between the rising base point of the rising portion 82 and the curved base point of the absorbent core 31 as shown in B of fig. 11, and leakage of excrement from the gap G can be suppressed. Further, the inner portion of the absorbent core 31 is away from the wearer's body, so that the inner portion of the absorbent core 31 is also away from the apex of the standing portion 82 existing closer to the wearer's body than the absorbent core 31. As a result, the height of the raised portion 82 can be ensured, and leakage of excrement can be suppressed.

The waist elastic member 55 may have a 1 st continuous elastic member 55C1 extending continuously from one end portion to the other end portion of the front body surrounding region S1 at a position further inward in the front-rear direction L than the central low contraction region LER 1. As shown in fig. 8 and 9, the wearer wears the absorbent article 1 such that the 1 st continuous elastic member 55C1 is positioned in the vicinity of the ilium IB of the wearer, and the front body surrounding region S1 can be continuously attached in the width direction W. Here, since the viscera, fat, and the like existing on the inner side of the ilium IB are less likely to be compressed, the wearer is less likely to feel uncomfortable even if the front body surrounding region S1 is brought into close contact with the wearer' S body in the vicinity of the ilium IB. The wearer wears the absorbent article 1 such that the 1 st continuous elastic member 55C1 is positioned in the vicinity of the wearer's ilium IB, and the central low-contraction region LER1 is disposed in a region above the ilium IB, that is, in a region with an increased circumference of the body circumference. Therefore, the region of the body of the wearer, which is not strongly tightened, can be disposed longer for the portion of the body circumference where the wearing sensation is easily deteriorated, and the wearing sensation of the wearer can be improved.

In addition, the contraction force of the 1 st continuous elastic member 55C1 may be larger than the contraction force of the other waist elastic members 55. Therefore, there is a region in which the contraction force is higher than that of the central low contraction region LER1 and the pair of side contraction regions ER1 at positions on the inner side in the front-rear direction L than the central low contraction region LER1 and the pair of side contraction regions ER 1. Further, there are regions in which the shrinkage force is higher than the strand side low shrinkage region LER2 and the pair of strand side shrinkage regions ER2 at positions outside in the front-rear direction L than the strand side low shrinkage region LER2 and the pair of strand side shrinkage regions ER 2. The other waist elastic member 55 may be the waist elastic member 55 in the same body surrounding region as the 1 st continuous elastic member 55C1, or may be the waist elastic member 55 in both the front body surrounding region S1 and the rear body surrounding region S2. When the wearer wears the absorbent article 1 such that the 1 st continuous elastic member 55C1 is positioned in the vicinity of the ilium IB of the wearer, the 1 st continuous elastic member 55C1 having a large contraction force can firmly adhere the front body surrounding region S1 to the wearer' S body in the vicinity of the ilium IB where the wearer is not likely to feel uncomfortable without being pressed by internal organs, fat, or the like.

The 1 st continuous elastic member 55C1 may be disposed rearward from the front end edge 16F of the cut-off side portion joining portion 16 at the front body surrounding region S1 by 5% to 20% of the total length in the front-rear direction L of the absorbent article 1. Thus, the 1 st continuous elastic member 55C1 can be easily positioned in the vicinity of the ilium IB of the wearer. In the front body surrounding region S1, the 1 st continuous elastic member 55C1 may be disposed in front of 20% to 90%, preferably 40% to 70%, more preferably 45% to 65% 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. Thus, the 1 st continuous elastic member 55C1 can be easily positioned in the vicinity of the ilium IB of the wearer.

The contraction force of the waist elastic member 55 can be measured, for example, as follows. The length H0 in the width direction W of the effective length portion of the waist elastic member 55 in a state where the absorbent article 1 is maximally elongated in the front-rear direction L to such an extent that wrinkles generated in the absorbent article 1 are no longer visible is measured. Next, the waist elastic member 55 is detached from the absorbent article 1, and the length H1 in the width direction W of the effective length portion of the waist elastic member 55 is measured. The contraction force of the waist elastic member 55 can be calculated by "contraction force=h0/H1". Instead of the contraction force, the magnitude of the contraction force may be compared by a gauge that defines the thickness of the waist elastic member 55.

Further, the 1 st continuous elastic member 55C1 may overlap the waist low basis weight portion 31L in the thickness direction T. In the waist low basis weight portion 31L having a low basis weight and low rigidity, the contraction of the 1 st continuous elastic member 55C1 is less likely to be hindered, and therefore the front body surrounding region S1 can be reliably brought into close contact with the body of the wearer. Further, the low waist weight portion 31L has a low weight per unit area, and therefore is less likely to expand even when absorbing excrement. Therefore, even after the excretion, the contraction of the 1 st continuous elastic member 55C1 is not easily hindered, and therefore the front body surrounding area S1 can be reliably brought into close contact with the body of the wearer.

As shown in fig. 7, the central low shrinkage region LER1 may overlap with the outer end edge 31O in the front-back direction L of the absorbent core 31 in the thickness direction T. The outer edge 31O of the absorbent core 31 tends to contract in the width direction W because it has lower rigidity than a portion (hereinafter referred to as an inner core portion) located inward in the front-rear direction L than the outer edge 31O of the absorbent core 31. In the case where the outer end edge 31O of the absorbent core 31 is contracted in the width direction W, the larger the difference in contraction between the outer end edge 31O of the absorbent core 31 and the inner core portion, the more easily the inner core portion is away from the wearer's body in order to escape the force applied in the width direction W. When the central low shrinkage region LER1 overlaps the outer edge 31O of the absorbent core 31 in the thickness direction T, the outer end portion of the absorbent core 31 including the outer edge 31O of the absorbent core 31 can be made less likely to shrink in the width direction W. Thus, the absorbent core 31 is less likely to be away from the body, and excrement is likely to reach the absorbent core 31, thereby further suppressing leakage of excrement.

The central low shrinkage region LER1 may overlap the extension 24 in the thickness direction T. As described above, the more outward in the front-rear direction, the more easily the abdomen and back protrude outward of the body, and therefore the abdomen and back protrude outward of the body in the region overlapping the extension 24 in the thickness direction (hereinafter referred to as the extension region) than in the region overlapping the absorbent core 31 in the thickness direction T (hereinafter referred to as the core region). The thickness of the extension region is smaller than the thickness of the core region by an amount that does not have the absorbent core 31. In the case where the width of the body surrounding region is fixed, the thinner the thickness is, the lower the wearing pressure is, and therefore the wearing pressure of the extended region is lower than the wearing pressure of the core region. The extension portion 24 overlaps the central low-contraction region LER1 having a low contraction force in the thickness direction T, so that an extension region having a lower wearing pressure and not being strongly tightened can be arranged in a portion protruding from the abdomen and back than the core region, and the wearing feeling of the wearer can be improved.

In addition, in the central low shrinkage region LER1, the shrinkage force in the width direction W may be larger than 0. The central low shrinkage region LER1 may overlap the extension 24 in the thickness direction T. In this case, as shown in fig. 10C, the extension 24 contracts in the width direction W with a weak force, so that a small gap can be created between the extension 24 and the wearer's body. As a result, leakage of excrement can be suppressed by reducing the gap, and the air permeability of the region prone to hot flashes due to overlapping with the extension 24 in the precursor surrounding region S1 can be improved. The discomfort caused by hot flashes to the wearer can be reduced and the wearing sensation can be improved.

The central low shrinkage region LER1 may overlap with a region outside the outer end edge 24F of the extension 24 in the front-rear direction L in the thickness direction T. The abdomen and the back protrude further to the outside of the body than the extension region in a region (hereinafter referred to as an outside region) outside the outer edge 24F of the extension portion 24 in the front-rear direction L. The thickness of the outer region is thinner than the thickness of the extended region by the amount without the extension 24, and thus the wearing pressure of the outer region is lower than the wearing pressure of the extended region. Further, since the outer region overlaps the central low-contraction region LER1 having a low contraction force in the thickness direction T, the outer region, which is less in wearing pressure and is not strongly tightened, can be disposed at a portion protruding from the abdomen and the back than the extension region, and the wearing feeling of the wearer can be further improved.

In addition, the maximum side edge EMA of the central low shrinkage region LER1 may be disposed further outside than the side edge 31E of the absorbent core 31. As a result, at least a part of the side contracted region ER1 is not disposed further inward in the width direction W than the side edges 31E of the absorbent core 31, and therefore the absorbent core 31 can be made less likely to stretch inward in the width direction W. As a result, the absorbent core 31 is less likely to contract in the width direction W, and therefore the absorbent area of the absorbent core 31 can be ensured, and leakage of excrement can be suppressed.

In the width direction W, the maximum side edge EMA of the central low shrinkage region LER1 may be located outside the inner side edge 842EI of the width joint 842. Accordingly, at least a part of the side portion contracted region ER1 is not disposed further inward in the width direction W than the inner edge 842EI of the width joint 842, and therefore the width joint 842 can be made less likely to stretch inward in the width direction W. Since the inner edge 842EI of the width joint portion 842 serves as a base point for the rising of the rising portion 82, the rising portion 82 is not easily stretched inward in the width direction W together with the width joint portion 842. As a result, the excrement is easily absorbed by the absorbent core 31 before reaching the rising portion 82, and leakage of the excrement can be suppressed.

The maximum side edge EMA of the central low shrinkage region LER1 may be disposed further outside than the side edge 20E of the absorbent main body 20. As a result, at least a part of the side contracted region ER1 is not disposed further inward in the width direction W than the side edges 20E of the absorbent main body 20, and therefore the absorbent main body 20 can be made less likely to stretch inward in the width direction W. As a result, the absorbent main body 20 is less likely to contract in the width direction W, and therefore the area of the absorbent main body 20 can be ensured, and leakage of excrement from the absorbent main body 20 can be suppressed.

In addition, in the width direction W, the maximum side edge EMA of the central low shrinkage region LER1 may be located further outside than the leg elastic members 75. In the case where the absorbent article 1 includes a plurality of leg elastic members 75, the maximum side edge EMA may be located at least outside the innermost leg elastic member 75 in the width direction W or may be located outside the outermost leg elastic member 75. The leg elastic members 75 contract in the front-rear direction L, so that the leg gathers 70 on which the leg elastic members 75 are disposed can be made to follow the leg circumference of the wearer, and leakage of excreta to the outside can be prevented. Here, since the maximum side edge EMA of the central low-shrinkage region LER1 is located outside the leg elastic members 75, at least a part of the side-shrinkage regions ER1 are not disposed inside the leg elastic members 75 in the width direction W, and therefore the leg elastic members 75 can be made less likely to stretch inside the width direction W. As a result, the position of the leg gathers 70 in the width direction W can be maintained, and the area of the holding area for holding excrement can be maintained.

In addition, in the width direction W, the minimum side edge EMI of the central low shrinkage region LER1 may be located further inward than the leg elastic members 75. In the case where the absorbent article 1 has a plurality of leg elastic members 75, the minimum side edge EMI may be located inside the outermost leg elastic members 75 or inside the innermost leg elastic members 75. The leg elastic members 75 are brought closer to the wearer's body side by contraction of the side contracted regions ER 1. In the vicinity of the leg elastic members 75, the gap between the absorbent article 1 and the wearer's body is reduced, and leakage of excrement can be suppressed.

In addition, the minimum side edge EMI of the central low shrinkage region LER1 may be disposed further inward than the side edge 31E of the absorbent core 31. Thereby, the side edges 31E of the absorbent core 31 are brought closer to the wearer's body side by contraction of the side contracted regions ER 1. In the vicinity of the side edges 31E of the absorbent core 31, the gap between the absorbent article 1 and the wearer's body is reduced, and leakage of excrement can be suppressed.

In addition, the strand-side low shrinkage region LER2 may overlap the absorbent core 31 in the thickness direction T. The portion of the absorbent core 31 overlapping the strand-side low shrinkage region LER2 having a low shrinkage force in the thickness direction T is less likely to shrink in the width direction W. Thus, the absorption area of the absorbent core 31 can be ensured, and leakage of excrement can be suppressed.

In addition, the side edges 31E of the absorbent core 31 may overlap the strand-side contracted region ER2 in the thickness direction T. As a result, a force directed outward in the width direction W acts on the side edges 31E of the absorbent core 31 by the contraction of the strand side contracted region ER2, and the absorbent core 31 is easily stretched outward in the width direction W. As a result, the side edges 31E of the absorbent core 31 are stretched outward in the width direction, and the absorbent core 31 is elongated outward in the width direction W. The absorption area of the absorbent core 31 can be ensured, and leakage of excrement can be suppressed.

In the width direction W, the inner edge of the thigh side contraction region ER2 may be located outside the side edge of the waist weight portion 31L. Thus, even if the leg side contraction region ER2 having a stronger contraction force than the leg side contraction region LER2 contracts in the width direction W, the force that contracts the waist low-unit-area weight portion 31L in the width direction does not act on the waist low-unit-area weight portion 31L. The waist low basis weight portion 31L is stretched outward in the width direction W by contraction of the side contracted region ER 1. As a result, the waist low-unit-area weight portion 31L having lower rigidity than the surrounding area and being liable to contract in the width direction W is less liable to contract in the width direction W, and therefore the absorption area of the absorbent core 31 can be ensured, and leakage of excrement can be suppressed.

The inner edge of the strand side contraction region ER2 may be located outside the slit 35. The slits 35 of the absorbent core 31 have lower rigidity than the surrounding area, and therefore tend to collapse in the width direction W. Here, the inner edge of the strand side contraction region ER2 is located outside the slit 35 of the absorbent core 31 in the width direction W. Therefore, even if the strand-side contraction region ER2 having a stronger contraction force than the strand-side contraction region LER2 contracts in the width direction W, the force that contracts the slit 35 in the width direction W does not act on the slit 35. Thereby, the slit 35 is less likely to collapse in the width direction W. If the slit 35 is not flattened in the width direction W, the slit 35 causes a difference in rigidity in the width direction W, and therefore the absorbent core 31 can be easily bent in the width direction W with the slit 35 as a base point. By bending the absorbent core 31 in the width direction W, the absorbent core 31 is easily accommodated in the crotch region S3, and thus the wearing sensation can be improved.

The inclination (L1/W1) of the length L1 of the central low shrinkage region LER1 in the front-rear direction L with respect to the length W1 of the width direction W from the minimum side edge EMI to the maximum side edge EMA may be smaller than the inclination (L2/W2) of the length L2 of the strand-side low shrinkage region LER2 in the front-rear direction L with respect to the length W2 of the width direction W from the side edge located outermost in the front-rear direction L to the minimum side edge EMI of the central low shrinkage region LER 1. In the case of a child of a short length and of a low month age, the change in the circumference CL of the abdomen side body in the front-rear direction L is large as compared with that of an adult. Thus, at a position outside the ilium IB in the anterior-posterior direction L, the circumference CL of the abdominal-side body circumference starts to increase according to the distance to the ilium IB. Then, by reducing the inclination from the minimum side edge EMI to the maximum side edge EMA (the inclination L1/W1 of the side edge of the central low shrinkage region LER 1), the width of the central low shrinkage region LER1 can be widened early in accordance with the circumference CL of the body circumference of the young child of low month age. Thus, the region which does not strongly tighten the body can be arranged in correspondence with the circumference CL of the body circumference of the child with low age, and thus the wearing feeling of the child with low age can be improved.

Further, the maximum side edge EMA that is easily disposed above the iliac edge IR may be located outside the center of the side joint 16 and the side edge 20E of the absorbent main body 20 in the width direction W. In addition, in consideration of the shape of the ilium IB, in order to secure a region that does not tighten the body more strongly than the outer side of the absorbent main body 20 in the width direction W to be wider, the length in the width direction W from the inner side edge of the 1 st discontinuous elastic member 55N that is the outermost side in the front-rear direction L of the 1 st discontinuous elastic members 55N that overlap the absorbent main body 20 in the thickness direction T to the inner side edge of the 1 st discontinuous elastic member 55N that is the innermost side in the front-rear direction L of the 1 st discontinuous elastic members 55N that do not overlap the absorbent main body 20 in the thickness direction T may be made the largest among the lengths in the width direction W between the inner side edges of the 1 st discontinuous elastic members 55N1 that are adjacent in the front-rear direction L.

In addition, the back side low shrinkage region LERR may overlap the absorbent core 31 in the thickness direction T. The width of the backside low shrinkage region LER may be wider than the width of the strand side low shrinkage region LER 2. This makes it possible to make the back side absorbent core 31 less likely to contract in the width direction W than the front side absorbent core 31. This ensures a wide absorption area of the back side absorbent core 31, and thus a wide space for accommodating urine and feces. As a result, leakage of excrement can be suppressed.

(5) Other embodiments

The above-described embodiments and modifications are described for illustrative purposes, and the present invention can be implemented in other modes. For example, the central low shrinkage region LER1 may be provided in the back body surrounding region S2, or the central low shrinkage region LER1 may be provided in both the front body surrounding region S1 and the back body surrounding region S2.

In addition, in the width direction W, the minimum side edge EMI of the central low shrinkage region LER1 may be located outside the side edge of the absorbent core 31. Accordingly, all the side contracted regions ER1 are not disposed further inward in the width direction W than the side edges of the absorbent core 31, and therefore the absorbent core 31 can be made less likely to stretch inward in the width direction W. As a result, the absorbent core 31 is less likely to contract in the width direction W, and therefore the absorbent area of the absorbent core 31 can be ensured, and leakage of excrement can be suppressed.

In the width direction W, the inner edge of the strand-side contracted region ER2 may be located further inward than the side edge of the absorbent main body 20. Further, in the width direction W, the inner edge of the back side portion contraction region ERR may be located further inward than the inner edge of the thigh side portion contraction region ER 2. The back side of the absorbent main body 20 is touched by the arms of the caretaker by the wearer being held or touched by the floor due to the sleeping posture, and therefore the back side absorbent main body 20 is more likely to deviate in the width direction than the abdomen side absorbent main body 20. When the inner edge of the back side contraction region ERR is located further inward than the inner edge of the thigh side contraction region ER2, the expansion/contraction force applied to the back side contraction region ERR of the absorbent body when the absorbent body is deviated in the width direction can be made larger than the expansion/contraction force of the thigh side contraction region ER 2. Accordingly, the expansion and contraction force of the back side portion contraction region ERR becomes larger in accordance with the displacement of the absorbent main body 20 in the width direction W, and therefore, in particular, the back side absorbent main body 20 can be made less likely to be displaced in the width direction W.

Note that the structures of the absorbent article 1 of the above-described embodiments, modifications, and other embodiments can be appropriately combined. The present invention is not limited to the description in the present specification. The present invention can be implemented in various modifications and variations without departing from the spirit and scope of the present invention as defined in the appended claims.

Further, the entire contents of japanese patent application nos. 2019-239805 and 2019-239810, which were filed on the 12 th month and 27 th days of 2019, are incorporated into the present specification by reference.

Description of the reference numerals

1. An absorbent article; 20. an absorbent body; 24. an extension; 31. an absorbent core; 31L, low basis weight waist portion; 55. a waist elastic member; 55CF, front continuous elastic member (continuous elastic member); 80. leak-proof hemming; 82. a rising part; 84. a joint; 841. front and rear joint parts; ER1, lateral constriction region; LER1, central low shrinkage region; MA, maximum width; MI, minimum width; WR, wide area; NR, narrow area.

Claims

1. An absorbent article having a front-back direction, a width direction, a thickness direction, a body surrounding region, a crotch region, an absorbent core, and a waist elastic member,

the width direction is orthogonal to the front-rear direction,

the body surrounding area is composed of a 1 st body surrounding area and a 2 nd body surrounding area,

the crotch region is sandwiched by the 1 st body surrounding region and the 2 nd body surrounding region in the front-rear direction,

the absorbent core comprises an absorbent material and,

the waist elastic member is disposed in the 1 st body surrounding area in a state of being elongated in the width direction,

The absorbent article is provided with a central low-shrinkage region that spans the widthwise center of the absorbent article, i.e., the widthwise center, in the 1 st body-surrounding region, and a pair of side-shrinkage regions that are adjacent to both outer sides of the central low-shrinkage region in the widthwise direction,

the widthwise shrinkage force of the central low shrinkage region is lower than the widthwise shrinkage force of the side shrinkage regions,

wherein,,

the absorbent article has a pair of leakage preventing cuffs which extend in the front-rear direction at least in the crotch region and are arranged on both sides of the width center,

the pair of leak-proof beads has an upright portion and a front-rear engaging portion,

the rising portion can rise toward the skin surface side by utilizing the contraction in the front-rear direction,

the front-rear joint part is positioned outside the rising part in the front-rear direction and cannot be joined to the skin surface side in a rising manner,

the central low-shrinkage region has a minimum width and a maximum width, the maximum width being located further outside in the front-rear direction than the minimum width,

In the front-rear direction, an inner end edge of the central low shrinkage region is located outside an inner end edge of the front-rear joint portion, the inner end edge of the central low shrinkage region being an inner end edge of the central low shrinkage region in the front-rear direction, the inner end edge of the front-rear joint portion being an inner end edge of the front-rear joint portion in the front-rear direction,

the front-rear joining portion overlaps the side constricted region in the thickness direction.

2. The absorbent article of claim 1, wherein,

the 1 st body surrounding area is arranged on the abdomen side of the wearer,

the width of the central low shrinkage region becomes wider as going to the outside in the front-rear direction,

the central low shrinkage region has a wide area and a narrow area,

the wide area extends from a position on the inner side in the width direction than the outer side edge of the front and rear joint portion to a position on the outer side in the width direction than the outer side edge of the front and rear joint portion,

the narrow area is an area on the inner side of the wide area in the front-rear direction,

the length of the wide area in the front-rear direction is longer than the length of the narrow area in the front-rear direction.

3. An absorbent article having a front-back direction, a width direction, a thickness direction, a body surrounding region, a crotch region, an absorbent core, and a waist elastic member,

the width direction is orthogonal to the front-rear direction,

the absorbent core comprises an absorbent material and,

wherein,,

the 1 st body surrounding area is arranged on the abdomen side of the wearer,

the absorbent core has a waist portion having a lower basis weight than the surrounding waist portion in the 1 st body surrounding region,

the waist portion low basis weight portion has a rear end edge in the 1 st body peripheral region,

In the front-rear direction, the inner end edge of the front-rear joint portion is located outside the rear end edge of the waist portion weight portion.

4. The absorbent article of claim 1, wherein,

the central low shrinkage region overlaps with an outer end edge of the absorbent core in the front-rear direction in the thickness direction.

5. The absorbent article of claim 4, wherein,

the absorbent article having an absorbent main body having the absorbent core and extending from the crotch region toward the 1 st body-surrounding region,

the absorbent body has an extension portion extending to a position outside the front-rear direction than the outer end edge of the absorbent core,

the central low shrinkage region overlaps the extension in the thickness direction.

6. The absorbent article of claim 5, wherein,

the central low-shrinkage region overlaps with a region outside the outer end edge of the extension in the front-rear direction in the thickness direction.

7. An absorbent article having a front-back direction, a width direction, a thickness direction, a body surrounding region, a crotch region, an absorbent core, an absorbent main body, an outer body, and a waist elastic member,

The width direction is orthogonal to the front-rear direction,

the absorbent core comprises an absorbent material and,

the absorbent body has the absorbent core,

the outer body is disposed on the non-skin surface side of the absorbent main body,

wherein,,

in the width direction, a side edge of the central low shrinkage region, that is, a maximum side edge, is located outside an inner edge of the front-rear joint portion at the position of the maximum width,

the waist elastic member has a discontinuous elastic member that extends continuously from an outer side portion of the body surrounding region toward an inner side in the width direction and does not extend continuously in the width direction at least in a center of the body surrounding region in the width direction,

the discontinuous elastic member is composed of a linear elastic member which is a linear or rope-like elastic member extending linearly in the width direction,

The boundary between the central low-shrinkage region and the side-shrinkage regions in the width direction is defined by the inner edge in the width direction of a portion of the discontinuous elastic member that extends continuously from the outer side portion of the outer body to the inner side in the width direction.

8. The absorbent article of claim 7, wherein,

in the width direction, the maximum side edge of the central low shrinkage region is disposed outside the side edge of the absorbent core.

9. The absorbent article according to claim 7 or 8, wherein,

the pair of leakage preventing beads has a width joint portion which is located outside the rising portion in the width direction and which is joined so as not to rise toward the skin surface side, and the maximum side edge of the central low shrinkage region is located outside the inner side edge of the width joint portion in the width direction.

10. The absorbent article of claim 7, wherein,

the absorbent article has an absorbent main body having the absorbent core, extending from the crotch region toward the 1 st body peripheral region, and the maximum side edge of the central low shrinkage region being located outside the side edge of the absorbent main body in the width direction.

11. The absorbent article of claim 7, wherein,

the absorbent article has leg elastic members which are disposed in an elongated state in the front-rear direction at least in the crotch region at positions outside the absorbent core in the width direction,

in the width direction, the maximum side edge of the central low shrinkage region is located outside the leg elastic member.

12. The absorbent article of claim 7, wherein,

in the width direction, a side edge of the central low shrinkage region, that is, a minimum side edge, at the position of the minimum width is located further inward than the leg elastic member.

13. The absorbent article of claim 7, wherein,

in the width direction, a side edge of the central low shrinkage region, that is, a minimum side edge, is located outside a side edge of the absorbent core at the position of the minimum width.

14. The absorbent article of claim 7, wherein,

in the width direction, a side edge of the central low shrinkage region, that is, a minimum side edge, at the position of the minimum width is located inside a side edge of the absorbent core.

15. The absorbent article according to claim 1 or 7, wherein,

the 1 st body surrounding area is arranged on the abdomen side of the wearer.

16. The absorbent article according to claim 1 or 7, wherein,

the width of the central low shrinkage region is widened as going to the outside in the front-rear direction.

17. The absorbent article according to claim 1 or 7, wherein,

the waist elastic member has a continuous elastic member continuously extending from one end portion to the other end portion of the 1 st body peripheral region at a position on the inner side in the front-rear direction than the central low contraction region.

18. An absorbent article having a front-back direction, a width direction, a thickness direction, a body surrounding region, a crotch region, an absorbent core, and a waist elastic member,

the width direction is orthogonal to the front-rear direction,

The absorbent core comprises an absorbent material and,

wherein,,

the waist elastic member has a continuous elastic member continuously extending from one end portion to the other end portion of the 1 st body peripheral region at a position on the inner side in the front-rear direction than the central low contraction region,

the contraction force of the continuous elastic member is greater than the contraction force of the other waist elastic members.

19. An absorbent article having a front-back direction, a width direction, a thickness direction, a body surrounding region, a crotch region, an absorbent core, and a waist elastic member,

the width direction is orthogonal to the front-rear direction,

the absorbent core comprises an absorbent material and,

wherein,,

the continuous elastic member overlaps the waist low basis weight portion in the thickness direction.

20. The absorbent article of claim 17, wherein,

the absorbent article is provided with a strand side low shrinkage region and a pair of strand side shrinkage regions,

The strand-side low shrinkage region spans the width center at the 1 st body surrounding region at a position inward of the continuous elastic member in the front-rear direction,

the pair of strand side contraction regions are adjacent to both outer sides of the strand side low contraction region in the width direction at positions on the inner sides of the continuous elastic member in the front-rear direction,

the widthwise shrinkage force of the strand side low shrinkage region is lower than the widthwise shrinkage force of the strand side shrinkage region,

the strand-side low shrinkage region overlaps the absorbent core in the thickness direction.

21. The absorbent article of claim 20, wherein,

the side edges of the absorbent core overlap the strand side contracted regions in the thickness direction.

22. The absorbent article of claim 20 or 21, wherein,

in the width direction, the inner edge of the strand side contraction region is located outside the side edge of the waist portion weight portion.

23. The absorbent article of claim 20 or 21, wherein,

The absorbent core has slits extending in the front-rear direction in the crotch region,

in the width direction, the inner edge of the strand side contraction region is located outside the slit.

24. The absorbent article of claim 20 or 21, wherein,

the 1 st body surrounding area is arranged on the abdomen side of the wearer,

an inclination of the length of the central low shrinkage region in the front-rear direction with respect to the length in the width direction from a side edge at the position of the minimum width, that is, a minimum side edge, to a side edge of the central low shrinkage region at the position of the maximum width, that is, a maximum side edge, is smaller than an inclination of the length of the strand side low shrinkage region in the front-rear direction with respect to the length in the width direction from an outermost side edge in the front-rear direction to the minimum side edge of the central low shrinkage region.

25. The absorbent article of claim 20 or 21, wherein,

the 1 st body surrounding area is arranged on the abdomen side of the wearer, the 2 nd body surrounding area is arranged on the back side of the wearer,

The absorbent article is provided with a back-side low-shrinkage region crossing the width center at the 2 nd body-surrounding region, and a pair of back-side-shrinkage regions adjacent to both outer sides of the back-side low-shrinkage region,

the contraction force in the width direction of the back side low contraction area is lower than the contraction force in the width direction of the back side contraction area,

the back side low shrinkage region overlaps the absorbent core in the thickness direction,

the width of the backside low-shrink region is wider than the width of the strand side low-shrink region.

26. The absorbent article as in claim 20 or 21, wherein,

the absorbent article has an absorbent main body having the absorbent core and extending from the crotch region toward the 1 st body-surrounding region,

the absorbent article is provided with a back-side low shrinkage region crossing the width center at the 2 nd body peripheral region, and a pair of back-side shrinkage regions adjacent to both outer sides of the back-side low shrinkage region in the width direction,

in the width direction, the inner side edge of the strand side contracted region is located further inward than the side edge of the absorbent main body,

in the width direction, an inner edge of the back side portion contraction region is located inward of the inner edge of the thigh side portion contraction region.