CN114929172A

CN114929172A - Absorbent article

Info

Publication number: CN114929172A
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: 2022-08-19
Anticipated expiration: 2040-12-25
Also published as: WO2021132620A1; CN114929172B

Abstract

Provided is an absorbent article which can achieve both the function of holding excrement and the feeling of wearing by the wearer. An absorbent article (1) has an absorbent core (31) and a waist elastic member (55). A central low shrinkage region (LER1) that crosses the Width Center (WC) of the absorbent article in the front waistline region (S1), and a pair of side shrinkage regions (ER1) that are adjacent to both outer sides of the central low shrinkage region (LER1) in the width direction (W) are provided. The widthwise shrinkage force of the central low-shrinkage region (LER1) is lower than the widthwise shrinkage force of the side-shrinkage region (ER 1). The central low shrinkage region (LER1) has a minimum width (MI) and a maximum width (MA) located on the outer side in the front-rear direction (L) than the minimum width (MI). The inner end edge (IE) of the central low shrinkage region (LER1) is located on the outer side of the inner end edge (841I) of the front-rear joint section (842) in the front-rear direction (L).

Description

Absorbent article

Technical Field

The present invention relates to an absorbent article including an absorbent core containing an absorbent material and a waist elastic member disposed in a stretched state in a width direction in a body peripheral region.

Background

Patent document 1 discloses an absorbent article including an absorbent core containing an absorbent material and a waist elastic member disposed in a body-surrounding region in an extended state in a width direction, the absorbent article being provided with a central low-shrinkage region and a pair of side-shrinkage regions. The central low shrinkage region spans the widthwise center of the absorbent article. The pair of side contracted regions are adjacent to both outer sides of the central low contracted region in the width direction. In addition, the widthwise shrinkage force of the central low-shrinkage region is lower than the widthwise shrinkage force of the side-shrinkage regions. Since the body of the wearer is protruded by the buttocks on the back side, the maximum width of the central low-shrinkage region on the back side is made larger than the maximum width of the central low-shrinkage 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 contracted regions adjacent to both outsides of the central low contracted region in the width direction, the decrease in the fit of the body surrounding region is suppressed. This makes it difficult for the absorbent article to be displaced from the body of the wearer, prevents the leakage of excrement to the outside, and allows the absorbent article to retain excrement. In the absorbent article described above, the function of holding excrement is maintained as a function of the absorbent article, and the wearability of the absorbent article is improved.

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open publication 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 adjusted relative to the maximum width of the central low-shrinkage region on the front side, thereby improving 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 not possible to achieve both the function of holding excrement and the wearing sensation of 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 body-surrounding region in an extended state in a width direction, the absorbent article being provided with a central low-contraction region and a pair of side-contraction regions, and being capable of satisfying both an excrement holding function and a wearing sensation of a wearer.

An absorbent article according to one 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 includes 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 includes an absorbent material, and the waist elastic member is disposed in the 1 st body surrounding region in an extended state in the width direction. A central low shrinkage region that extends across a width center that is a center in the width direction of the absorbent article in the 1 st body area, and a pair of side shrinkage regions that are adjacent to both outer sides of the central low shrinkage region in the width direction are provided. 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 outward in the front-rear direction from the minimum width. An inner end edge of the central low shrinkage region is located outward of an inner end edge of the front-rear joint section in the front-rear direction.

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 includes 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 disposed in the 1 st body surrounding region in an extended state in the width direction. A central low shrinkage region that extends across a width center that is a center in the width direction of the absorbent article in the 1 st body area, and a pair of side shrinkage regions that are adjacent to both outer sides of the central low shrinkage region in the width direction are provided. 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 outward in the front-rear direction from the minimum width. In the width direction, a maximum side edge, which is a side edge of the central low shrinkage region at the maximum width position, is located outward of an inner edge of the front and rear joint portions.

Drawings

Fig. 1 is a schematic front view of the 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 taken along line F3A-F3A in fig. 2, and fig. 3B is a schematic cross-sectional view of the absorbent article taken along 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 illustrating a low shrinkage region and a containment curl.

Fig. 6 a is a schematic cross-sectional view of the absorbent article taken along 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 part stands 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 a 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 sectional view taken along the line F8A-F8A in fig. 8, fig. 10B is a schematic sectional view taken along the line F8B-F8B in fig. 8, and fig. 10C is an enlarged view of the illustration of fig. 8B.

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

Detailed Description

(1) Brief description of the embodiments

An absorbent article according to one 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 configured 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 disposed in the 1 st body surrounding region in an extended state in the width direction. A central low shrinkage region that extends across a width center that is a center in the width direction of the absorbent article in the 1 st body area, and a pair of side shrinkage regions that are adjacent to both outer sides of the central low shrinkage region in the width direction are provided. 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 outward in the front-rear direction from the minimum width. An inner end edge of the central low shrinkage region is located outward of an inner end edge of the front-rear joint section in the front-rear direction. With this configuration, the function of holding excrement can be maintained, and the wearing feeling of the wearer can be improved.

According to a preferred aspect, the 1 st circumferential region is disposed on the abdominal side of the wearer. Since the height of the iliac crest on the ventral side is lower than the height of the iliac crest on the dorsal side, the region covered with the ilia, such as the 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. By disposing the central low-contraction region on the abdomen of the wearer, the region strongly tightening the abdomen of the wearer can be reduced, and the wearing feeling can be improved.

According to a preferred aspect, the width of the central low shrinkage region increases outward in the front-rear direction. In the peripheral region, the height of the iliac crest increases from the central portion to the lateral portions, and therefore, the more outward in the front-rear direction (the side of the waist opening) the central portion, the less the region covered with the ilia. Therefore, the more outward in the front-rear direction, the more easily the body of the wearer protrudes, and the longer the circumferential length of the body circumference of the wearer. By increasing the width of the central low-shrinkage region outward in the front-rear direction, the width of the central low-shrinkage region increases in accordance with the circumferential length of the body circumference of the wearer, and the region that does not tighten the body of the wearer increases. As a result, the wearing feeling can be improved.

According to a preferred aspect, the front-rear joint portion and the side contracted region overlap in the thickness direction. Since the front and rear joint portions are in close contact with the body of the wearer due to contraction of the side contracted regions, a gap is less likely to be formed between the body of the wearer and the front and rear joint portions. Therefore, leakage of excrement passing through the gap can be suppressed.

According to a preferred aspect, the 1 st torso-surrounding region is disposed on the abdominal side of the wearer, the central low-contraction region has a wide region and a narrow region, the wide region extends from a position on the inside in the width direction with respect to the outer edge of the front-rear joint to a position on the outside in the width direction with respect to the outer edge of the front-rear joint, the narrow region is a region on the inside in the front-rear direction with respect to 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 containment beads extend in the front-to-rear direction in the crotch region, and therefore the front-to-rear joint is disposed to conform to the width of the wearer's thigh. Here, since the longitudinal length of the wide region is longer than the longitudinal length of the narrow region, the ratio of the area of the central low-shrinkage region disposed on the outer side in the width direction than the position corresponding to the width of the wearer's thighs can be increased. This makes it possible to prevent the body of the wearer from being strongly tightened with a large area in the region outside the position corresponding to the width of the wearer's thighs in the width direction, thereby improving the wearing feeling.

According to a preferred aspect, the 1 st bodyshell region is disposed on the abdominal 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 bodyshell region, the waist low-basis-weight portion has a rear end edge in the 1 st bodyshell region, and the inner end edge of the front-rear joint portion is located outward of 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 abdominal side of the wearer tends to be bent in the front-back direction (direction away from the body of the wearer) toward the non-skin surface side due to sitting posture, forward bending, or the like. Here, since the difference in rigidity is large in the front and rear of the rear end edge of the waist low basis weight portion, the rear end edge of the waist low basis weight portion is likely to be the origin of bending of the absorbent core. The inner end edges of the front and rear joint portions are located further to the outside than the end edges of the waist low basis weight portions in the front-rear direction, and therefore the inner end edges of the front and rear joint portions are easily located further to the outside in the front-rear direction than the bending base point of the absorbent core. Thereby, the rising portion can rise from the bending base point of the absorbent core. Therefore, a gap is less likely to be formed between the standing point of the standing portion and the bending point of the absorbent core, and leakage of excrement from the gap can be suppressed. Further, the inner portion of the absorbent core is distant from the wearer's body, so that the inner portion of the absorbent core is also distant from the apex of the standing portion existing closer to the wearer's body than the absorbent core. As a result, the height of the rising portion can be secured, and leakage of excrement can be suppressed.

According to a preferred aspect, the waist elastic member includes a continuous elastic member continuously extending from one end portion to the other end portion of the 1 st circumferential region at a position inward in the front-rear direction with respect to the central low-contraction region. The wearer wears the absorbent article so that the continuous elastic member is positioned near the wearer's ilium, thereby enabling the 1 st body region to be continuously fitted in the width direction. Here, since internal organs, fat, and the like located inside the ilium are not easily compressed, the wearer is not likely to feel discomfort in the vicinity of the ilium even if the 1 st body surrounding region is brought into close contact with the body of the wearer. Further, the wearer wears the absorbent article such that the continuous elastic member is positioned in the vicinity of the ilium of the wearer, and the central low-contraction region is disposed in a region above the ilium, that is, a region having an increased circumference of the body circumference. Therefore, in a portion where the circumferential length of the body circumference is long and the wearing sensation is likely to deteriorate, the region that does not tighten strongly against the body of the wearer can be arranged long, and the wearing sensation of the wearer can be improved.

According to a preferred aspect, the continuous elastic member has a larger contractive force than 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 ilium of the wearer, internal organs, fat, and the like present inside the ilium are less likely to be compressed. Therefore, the 1 st body surrounding region can be firmly brought into close contact with the body of the wearer by the continuous elastic member having a large contractive force in the vicinity of the ilium where the wearer is not likely to feel uncomfortable because the internal organs, fat, and the like are not pressed.

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

According to a preferred aspect, 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 a portion on the front-rear direction inner side than the outer end edge of the absorbent core (hereinafter referred to as an 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 greater the contraction difference between the outer end edge of the absorbent core and the inner core portion, the more easily the inner core portion is separated from the body of the wearer in order to allow the force applied in the width direction to escape. Then, by overlapping the central low shrinkage region where the shrinkage force is low 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 shrink in the width direction. This makes it difficult for the absorbent core to get away from the body, and the excrement can easily reach the absorbent core, thereby further suppressing the leakage of the excrement.

According to a preferred aspect, the absorbent article includes an absorbent body having the absorbent core and extending from the crotch region to the 1 st body peripheral region, the absorbent body includes an extending portion extending to a position further outward in the front-rear direction than the outer edge of the absorbent core, and the central low-shrinkage region and the extending portion overlap in the thickness direction. The abdomen and the back are more likely to protrude outward of the body as they go outward in the front-back direction, and therefore the abdomen and the back protrude outward of the body in a region overlapping with the extending portion in the thickness direction (hereinafter referred to as an extending region) than in a region overlapping with the absorbent core in the thickness direction (hereinafter referred to as a core region). Here, the thickness of the extension region is thinner than that of the core region in an amount without the absorbent core. In the case where the width of the peripheral region is constant, the wearing pressure is lower as the thickness is thinner, and therefore the wearing pressure in the extension region is lower than that in the core region. The extension portion overlaps the central low-shrinkage region having a low shrinkage force in the thickness direction, so that the extension region having a low wearing pressure and not being strongly tightened can be disposed at 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 aspect, the central low shrinkage region overlaps with a region on the outer side in the front-rear direction with respect to the outer end edge of the extension portion in the thickness direction. The abdomen and the back protrude outward from the body in a region outside the front-rear direction (hereinafter referred to as an outer region) from the outer end edge of the extension portion. The thickness of the outer region is thinner than that of the extended region by the amount of no extended portion, so that the wearing pressure of the outer region is lower than that of the extended region. Further, since the outer region overlaps the central low-shrinkage region having a low shrinkage force in the thickness direction, the outer region having a low wearing pressure and not being strongly tightened can be disposed at the portion where the abdomen and the back protrude from the extended region, and the wearing feeling of the wearer can be further improved.

An absorbent article according to another 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 includes 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 disposed in the 1 st body surrounding region in an extended state in the width direction. A pair of central low-shrinkage regions and a pair of side-shrinkage regions are provided, the central low-shrinkage regions extending across the width center, which is the center in the width direction of the absorbent article, in the 1 st bodyshell region, and the side-shrinkage regions being adjacent to both outer sides of the central low-shrinkage region in the width 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 outward in the front-rear direction from the minimum width. In the width direction, a maximum side edge, which is a side edge of the central low shrinkage region at the maximum width position, is located outward of an inner edge of the front and rear joint portions. With this configuration, both the function of holding excrement and the wearing feeling of the wearer can be satisfied.

According to a preferred aspect, the maximum side edge of the central low shrinkage region is disposed further outward than the side edge of the absorbent core in the width direction. Thus, at least a part of the side contracted region is not disposed inward in the width direction of the side edge of the absorbent core, and therefore the absorbent core can be made less likely to stretch inward in the width direction. As a result, the absorbent core is less likely to contract in the width direction, so the absorbent area of the absorbent core can be secured, and leakage of excrement can be suppressed.

According to a preferred aspect, the pair of leakage preventing beads have a width joining portion which is located on the outer side in the width direction than the rising portion and 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 on the outer side in the width direction than the inner side edge of the width joining portion. 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 width joined portion, and therefore the width joined portion can be made less likely to be stretched inward in the width direction. Since the inner edge of the width joining portion serves as a base point for raising the rising portion, the rising portion is not easily pulled inward in the width direction together with the width joining portion. As a result, the excrement can be easily absorbed by the absorbent core before reaching the standing part, and leakage of the excrement can be suppressed.

According to a preferred aspect, the absorbent article includes an absorbent body having the absorbent core, the absorbent body extending from the crotch region to the 1 st body peripheral region, and the maximum side edge of the central low-shrinkage region being located outward of the side edge of the absorbent 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 be stretched 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, an area for holding excrement can be secured.

According to a preferred aspect, the absorbent article includes a leg elastic member, the leg elastic member is disposed in an extended state in the front-rear direction at a position on the outer side in the width direction than the absorbent core in at least the crotch region, and the maximum side edge of the central low shrinkage region is positioned on the outer side than the leg elastic member in the width direction. The leg elastic members contract in the front-back direction, so that the regions where the leg elastic members are arranged (so-called leg gathers) can be made to follow the leg circumferences of the wearer, and leakage of excrement to the outside can be prevented. Here, since the maximum side edge of the central low-shrinkage region is located on the outer side in the width direction than the leg elastic member, at least a part of the side-portion shrunk region is not located 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 to the inner side in the width direction. As a result, the position in the width direction of the leg gathers can be maintained, and the area of the holding region that holds excrement can be maintained.

According to a preferred aspect, the absorbent article includes a leg elastic member, the leg elastic member is disposed in an extended state in the front-rear direction at a position on the outer side in the width direction than the absorbent core in at least the crotch region, and 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 on the inner side than the leg elastic member. Thereby, the leg elastic members are brought closer to the wearer's body by contraction of the side contracted 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 aspect, a minimum side edge, which is a side edge of the central low shrinkage region at the position of the minimum width, is located outward of a side edge of the absorbent core in the width direction. Thus, all the side contracted regions are not disposed inward in the width direction of the side edge of the absorbent core, and therefore the absorbent core can be made less likely to stretch inward in the width direction. As a result, the absorbent core is less likely to contract in the width direction, so the absorbent area of the absorbent core can be secured, and leakage of excrement can be suppressed.

According to a preferred aspect, a minimum side edge, which is a side edge of the central low shrinkage region at the position of the minimum width, is located inward of a side edge of the absorbent core in the width direction. The side edges of the absorbent core are brought closer to the body side of the wearer by contraction of the side contraction regions. In the vicinity of the side edges of the absorbent core, the gap between the absorbent article and the wearer's body is reduced, and leakage of excrement can be suppressed.

According to a preferred aspect, the waist elastic member has a continuous elastic member continuously extending from one end portion to the other end portion of the 1 st torso-encircling region at a position inward in the front-rear direction with respect to the central low-contraction region. The wearer wears the absorbent article so that the continuous elastic member is positioned near the wearer's ilium, thereby enabling the 1 st body region to be continuously fitted in the width direction. Here, since internal organs, fat, and the like located inside the ilium are not easily compressed, the wearer is not likely to feel discomfort even if the 1 st body peripheral region is brought into close contact with the body of the wearer in the vicinity of the ilium. On the other hand, when the wearer wears the absorbent article with the continuous elastic members positioned in the vicinity of the ilium of the wearer, the central low-contraction region is disposed in the region above the ilium, that is, in the region with an increased circumferential length of the body circumference. Therefore, in a portion where the circumference of the body circumference is long and the wearing feeling is likely to deteriorate, the region that does not strongly tighten the body of the wearer can be arranged long, and the wearing feeling of the wearer can be improved.

According to a preferred embodiment, a pair of strand-side (japanese: side) low shrinkage regions and a pair of strand-side shrinkage regions are provided, the strand-side low shrinkage regions extending across the width center at positions inward in the front-rear direction of the continuous elastic member in the 1 st leg-surrounding region, and the pair of strand-side shrinkage regions being adjacent to both outer sides of the strand-side low shrinkage regions in the width direction at positions inward in the front-rear direction of the continuous elastic member. The width-directional shrinkage force of the strand-side low-shrinkage region is lower than the width-directional shrinkage force of the strand-side low-shrinkage region. The strand-side low shrinkage region overlaps with the absorbent core in the thickness direction. Since the portion of the absorbent core that overlaps the low-shrinkage region on the crotch side, which has a low contractive force, in the thickness direction is less likely to contract in the width direction, the absorbent area of the absorbent core can be secured, and leakage of excrement can be suppressed.

According to a preferred aspect, the side edges of the absorbent core and the thigh-side contracted regions overlap in the thickness direction. Thus, the force acting outward in the width direction acts on the side edges of the absorbent core due to the contraction of the contracted region of the thigh-side portion, and the absorbent core is easily stretched outward in the width direction. As a result, the side edges of the absorbent core are pulled outward in the width direction, and the absorbent core is pulled outward in the width direction. The absorption area of the absorbent core can be secured, and leakage of excrement can be suppressed.

According to a preferred aspect, the absorbent core has a waist low basis weight portion having a lower basis weight than the surrounding area in the 1 st circumferential region, and the inner edge of the contracted crotch-side region is located outward of the side edge of the waist low basis weight portion in the width direction. The low waist portion has lower rigidity than the surrounding area, and therefore tends to contract in the width direction. Here, the inner edge of the thigh-side contracted region is located further outward in the width direction than the side edge of the waist low basis weight portion. Therefore, even if the side contracted region on the side of the thigh, which has a higher contraction force than the side low contracted region on the side of the thigh, contracts in the width direction, a force for contracting the low waist weight portion in the width direction does not act on the low waist weight portion. This makes it difficult for the waist low basis weight portion to contract in the width direction, and therefore the absorbent area of the absorbent core can be secured, and leakage of excrement can be suppressed.

According to a preferred aspect, the absorbent core has a slit extending in the front-rear direction in the crotch region, and the inner edge of the contracted thigh-side region is located outward of 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 thigh-side contracted region is located further outward in the width direction than the slit of the core. Therefore, even if the strand-side contracted region, which has a stronger contraction force than the strand-side low-contracted region, is contracted in the width direction, a force to contract the slit in the width direction does not act on the slit. This makes the slit less likely to be crushed in the width direction. When the slits are not crushed in the width direction, a difference in rigidity occurs in the width direction due to the slits, and therefore the absorbent core can be easily bent in the width direction with the slits as base points. By bending the absorbent core in the width direction, the absorbent core can be easily accommodated in the crotch region, and the wearing sensation can be improved.

According to a preferred aspect, the 1 st bodice region is disposed on the abdominal side of the wearer, and the width of the central low shrinkage region increases outward in the longitudinal direction, and an inclination of the longitudinal length with respect to the longitudinal length from a minimum side edge, which is a side edge of the central low shrinkage region, at the minimum width position to the maximum side edge of the central low shrinkage region is smaller than an inclination of the longitudinal length with respect to the longitudinal length from a side edge located outermost in the longitudinal direction of the thigh-side low shrinkage region to the minimum side edge of the central low shrinkage region. In the case of a short-sized infant, the change in the circumferential length of the abdominal circumference in the front-rear direction is greater than that of an adult. Therefore, the circumferential length of the abdominal circumference begins to increase at a position more outside than the ilium in the front-rear direction, depending on the distance to the ilium. Then, by reducing the inclination of the side edges of the central low-shrinkage region (the inclination from the smallest side edge to the largest side edge), the width of the central low-shrinkage region can be made wider early according to the girth of the body circumference of a young child of low age. This makes it possible to arrange the region that does not tighten the body strongly in accordance with the circumferential length of the body circumference of the young child, and therefore, the wearing feeling of the young child can be improved.

According to a preferred aspect, the 1 st bodyshell region is disposed on the abdominal side of a wearer, the 2 nd bodyshell region is disposed on the back side of the wearer, and a back-side low-shrinkage region and a back-side-shrinkage region are provided, the back-side low-shrinkage region straddles the width center in the 2 nd bodyshell region, the back-side-shrinkage regions are paired and 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. Since the width of the back-side low-shrinkage region is wider than the width of the thigh-side low-shrinkage region, the back-side absorbent core can be made less likely to shrink in the width direction than the stomach-side absorbent core. This ensures a large absorption area of the back-side absorbent core, and a large storage space for feces and urine. As a result, leakage of excrement can be suppressed.

According to a preferred aspect, the absorbent article has an absorbent body having the absorbent core and extending from the crotch region to the 1 st bodyshell region, the 1 st bodyshell region being disposed on the abdominal side of a wearer, the 2 nd bodyshell 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 spanning the width center in the 2 nd bodyshell region, the pair of back-side contracted regions being adjacent to both outer sides of the back-side low-shrinkage region in the width direction, the contraction force in the width direction of the back-side low-shrinkage region being lower than the contraction force in the width direction of the back-side contracted region, and an inner edge of the thigh-side contracted region being located inward of a side edge of the absorbent body in the width direction, an inner edge of the back-side laterally contracted region is located inward of the inner edge of the thigh-side laterally contracted region in the width direction. Since the back side of the absorbent main body is held by the wearer and touches the arms of the caregiver or touches the floor in a sleeping posture, the back side of the absorbent main body is more likely to be deviated in the width direction than the abdomen side of the absorbent main body. In this case, the elastic force applied to the back-side contracted region of the absorbent main body when the absorbent main body is displaced in the width direction can be made larger than the elastic force applied to the thigh-side contracted region by positioning the inner edge of the back-side contracted region more inward than the inner edge of the thigh-side contracted region. As a result, the stretching force of the back-side contracted region becomes larger in accordance with the deviation in the width direction of the absorbent main body, and therefore, the back-side absorbent main body can be made less likely to deviate in the width direction in particular.

(2) General structure of absorbent article

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

The absorbent article 1 has a body peripheral region including a 1 st body peripheral region and a 2 nd body peripheral region, and a crotch region S3 sandwiched between the 1 st body peripheral region and the 2 nd body peripheral region in the front-rear direction in the crotch region S3. In the present embodiment, the 1 st torso circumferential region is the front torso circumferential region S1 disposed on the ventral side of the wearer. The front waistline region S1 is a region opposed to the front waistline portion (abdomen) of the wearer. The 2 nd torso-surrounding region is a rear torso-surrounding region S2 disposed on the back side of the wearer. The rear torso-surrounding region S2 is a region facing the rear torso-surrounding portion (back) of the wearer. The crotch region S3 is a region located in the crotch of the wearer and disposed between the front waistline region S1 and the rear waistline region S2.

The absorbent article 1 may have an absorbent main body 20 and an exterior body 50. The absorbent main body 20 may be configured independently of the exterior body 50. The absorbent main body 20 is disposed at least in the crotch region S3. The absorbent body 20 may extend in the front-rear direction L from the crotch region S3 to the front body region S1, and may extend in the front-rear direction L from the crotch region S3 to the rear body region S2. The absorbent main body 20 may have an extended portion 24, and the extended portion 24 may extend to a position outside the front-rear direction L with respect to the outer end edge 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 in the front waistline region S1 and the back waistline region S2. The exterior body 50 is disposed at least in the peripheral region. The exterior body 50 includes a front exterior body 50A disposed in the front body surrounding region S1 and a rear exterior body 50B disposed in the rear body surrounding region S2.

As shown in fig. 1, the absorbent article 1 may have side joint portions 16, and the side joint portions 16 may join an outer portion in the width direction W of the front outer cover 50A and an outer portion in the width direction W of the rear outer cover 50B, which are disposed in the front waistline region S1. The side joint portion 16 is defined by a portion where the outer side portion of the front exterior body 50A and the outer side portion of the rear exterior body 50B are joined to each other. The side joint portions 16 may extend in the front-rear direction L in the front outer package 50A and the rear outer package 50B, respectively. In the absorbent article 1, a waist opening 17 through which the body of the wearer passes and a pair of leg hole openings 18 into which the legs of the wearer are inserted are formed in a state where the side joining portions 16 are formed. 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 pant-type absorbent article 1, the crotch region S3 may be defined by the inner end edges of the side joining sections 16 in the front-rear direction L. The boundary between the front surrounding region S1 and the crotch region S3 may be defined by the rear end edge 16R of the side joint portion 16 at the front surrounding region S1. The boundary between the rear body surrounding region S2 and the crotch region S3 may be defined by the front end edge 16F of the side joint portion 16 at the rear body surrounding region S2. The crotch region S3 may be defined by the region in which the leg hole openings 18 are 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 leg hole region S1 and the crotch region S3 may be defined by the front end edge of the leg hole opening 18. The boundary between the rear body surrounding region S2 and the crotch region S3 may be defined by the rear end edge of the leg hole opening 18.

The outer portion in the present specification means a portion that occupies a certain range in the width direction W including an outer edge in the width direction W, and the outer edge means an outer edge in the width direction W. The inner side portion in the present specification means a portion occupying a certain 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 certain range in the front-rear direction L including edges in the front-rear direction L, and the front end portion and the rear end portion 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 absorbent body 30, a topsheet 41, a backsheet 42, and a side sheet 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, pulp and at least one of a super absorbent polymer. The absorbent body 30 may have a core sheet 32 covering the absorbent core 31. The core wrap sheet 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-covering sheets 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 so as to wrap the absorbent core 31. The core sheet 32 may be made of, for example, paper towel, nonwoven fabric, or the like.

The absorbent core 31 may have a waist low-area-weight portion 31L having a lower weight per area than the periphery in the front waistline region S1. The waist low-basis weight portion 31L may have a rear end edge 31LR in the front waistline region S1. The absorbent material in the waist low basis weight portion 31L has a basis weight lower than that of the absorbent material in the portion of the absorbent core 31 having a higher basis weight than the waist low basis weight portion 31L (i.e., the absorbent core 31 located rearward of the rear end edge 31LR of the waist low basis weight portion 31L). In the embodiment, the weight per unit area of the absorbent material in the waist low unit area weight portion 31L is 0. In this case, the absorbent material of the waist low basis weight portion 31L may have a basis weight of substantially 0, and the absorbent material of the absorbent core 31 around the waist low basis weight portion 31L may protrude into the waist low basis weight portion 31L. The absorbent material in the waist low basis weight portion 31L may have a basis weight higher than 0. In addition, the absorbent core 31 may also have slits 35 extending in the front-back direction L in the crotch region S3. The pair of slits 35 is arranged outward in the width direction W from the width center WC which is the center of the absorbent core 31 in the width direction W.

The topsheet 41 is positioned closer to the skin surface side T1 than the absorber 30. The front sheet 41 is opposed to the wearer's skin. 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 surface side T2 than the absorbent body 30. The back sheet 42 may be constituted of a film, for example, as long as it has liquid impermeability.

The side sheet 47 is disposed outward in the width direction W from the width center WC, which is the center of the absorbent core 31 in the width direction W. The side sheet 47 faces the skin of the wearer. The side sheet 47 may extend in the width direction W so as to extend across the center in 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 closer to the non-skin surface side T2 than the back sheet 42 in the region overlapping the absorbent body 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 FL3) along the front-rear direction L. The side sheet 47 may have a 1 st portion 471 extending from the center of the absorbent body 20 in the width direction W to the 1 st fold FL1 outward in the width direction W at a position closer to the non-skin surface side T2 than the absorbent body 30 in the width direction W. The side sheet 47 may constitute a side edge 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 panel 47 may have a 3 rd part 473 extending outward in the width direction W from the 2 nd fold line FL2 to the 3 rd fold line FL 3. In addition, the side sheet 47 may have a 4 th part 474 extending from the 3 rd fold FL3 inward in the width direction W. 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 toward the skin surface side T1.

The outer package 50 (the front outer package 50A and the rear outer package 50B) is disposed closer to the non-skin surface side T2 than the absorbent main body 20. The exterior body 50 may be formed of a plurality of sheet members. The outer package 50 may have a sheet member disposed closer to the skin surface side T1 than the absorbent main body 20. Further, the outer package 50 has a waist elastic member 55.

The front outer cover 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 outer portion of the 1 st front side sheet 51F 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 exterior body 50B may be separated from the front exterior body 50A in the front-rear direction L. The rear outer cover 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 the torso-surrounding region (the front torso-surrounding region S1 or the rear torso-surrounding region S2) in an elongated state 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 continuously extends from one outer side portion of the torso surrounding region (the front torso surrounding region S1 or the rear torso 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 at the center in the width direction W of the body surrounding region. The center of the body-surrounding region in the width direction W is a region at least from one outer side edge to the other outer side 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 string-like elastic member extending in the width direction W, or may be constituted by an elastic sheet 55S which is a sheet-like elastic member. The linear elastic member 55L may linearly extend 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 less than 5mm, for example. The length of the stretchable sheet 55S in the front-rear direction L may be 5mm or more, for example. In the embodiment, the waist elastic member 55 is composed of a linear elastic member 55L and an extensible sheet 55S. Specifically, the continuous elastic member 55C is composed of a linear elastic member 55L and an expansion piece 55S, and the discontinuous elastic member 55N is composed of a linear elastic member 55L. The stretch panel 55S constitutes a continuous elastic member 55C. The stretch 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 stretch panel 55S may be disposed closer to the skin surface side T1 than the linear elastic member 55L.

The front continuous elastic member 55CF composed of the linear elastic member 55L may have the 1 st continuous elastic member 55C1 and the 2 nd continuous elastic member 55C 2. The 1 st continuous elastic member 55C1 extends continuously from one end to the other end of the front surrounding region S1 at a position inward in the front-rear direction L from a central low-shrinkage region LER1 described later. The 2 nd continuous elastic member 55C2 extends continuously from one end to the other end of the front surrounding region S1 at a position outside the central low-shrinkage region LER1 in the front-rear direction L. The 1 st continuous elastic member 55C1 may be disposed rearward of the front end edge 16F of the side portion joint section 16 in the front waistline 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 torso region S1, the 1 st continuous elastic member 55C1 may be disposed forward from the rear end edge 16R of the side joined portion 16 by 20% to 90%, preferably forward by 40% to 70%, and more preferably forward by 45% to 65%, of the entire length of the side joined portion 16 in the front-rear direction L.

The front discontinuous elastic member 55NF of linear elastic members 55L may have the 1 st discontinuous elastic member 55N1 and the 2 nd discontinuous elastic member 55N 2. The 1 st discontinuous elastic member 55N1 is formed of a plurality of linear elastic members 55L arranged at intervals in the front-rear direction L. At least some of the plurality of linear elastic members 55L (the 1 st discontinuous elastic member 55N1) have different lengths in the width direction W, that is, different lengths continuously extending from the outer side of the front skirt region S1 to the inner side in the width direction W. The 2 nd discontinuous elastic member 55N2 is disposed inward of the 1 st continuous elastic member 55C1 in the front-rear direction L. The 1 st discontinuous elastic member 55N1 may linearly extend from the side joint 16 inward in the width direction W to an inner edge of a side contracted region ER1 described later. Similarly, the 2 nd discontinuous elastic member 55N2 may linearly extend from the side joint 16 inward in the width direction W to an inner edge of a thigh-side contracted region ER2 described later.

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

The absorbent article 1 may have leg gathers 70. The leg gathers 70 are gathers provided on the outer side in the width direction W than the absorbent core 31. The leg gathers 70 may be provided around the leg hole openings 18 and the leg hole openings 18. Further, the leakage preventive 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 an extended state in the front-back direction L at least in the crotch region S3 at positions outward in the width direction W relative to the absorbent core 31. The leg elastic member 75 extends in the front-back direction L at least in the crotch region S3. The leg elastic member 75 may extend to the front torso-surrounding region S1 and may also extend to the rear torso-surrounding region S2. The leg elastic member 75 may be disposed on the side sheet 47. The leg elastic member 75 may be disposed between the side sheet 47 and the back sheet 42 in the thickness direction T. In addition, the leg elastic member 75 may be disposed so as 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 at the outermost sides in the width direction W) of a part of the plurality of leg elastic members 75 may be disposed so as to be sandwiched between the side pieces 47 in the thickness direction T. The leg elastic members 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 sheets 47 in addition to the leg elastic members 75. The leg gathers 70 may also be formed of leg elastic members 75, side sheets 47 and back sheets 42. The leg elastic members 75 may be disposed on another sheet member (a 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 beads 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 preventive beads 80 has a rising portion 82 and a joining portion 84, the rising portion 82 can rise to the skin surface side T1 by contraction in the front-rear direction L, and the joining portion 84 cannot rise to the skin surface side T1 and is joined.

The rising portion 82 can rise by contraction of the leg side elastic member 85. The leg side elastic members 85 are disposed on the side sheets 47 in an extended state in the front-rear direction L. The leg side elastic members 85 may be sandwiched by the side sheets 47. May be provided between the 2 nd part 472 and the 3 rd part 473 of the side sheet 47. The leg side elastic member 85 may be fixed to at least one of the 2 nd part 472 and the 3 rd part 473 of the side sheet 47. The leg side elastic member 85 may be formed of a single elastic member, or may be formed of a plurality of elastic members arranged at intervals in the width direction W. In the present embodiment, the elastic member is composed of two elastic members. The leg side elastic member 85 may be formed of a thread-like or string-like elastic member extending in the front-rear direction L.

The joint 84 has front and rear joints 841 and a width joint 842. The front-rear joint section 841 is located further outward in the front-rear direction L than the rising section 82, and is joined so as not to rise toward the skin surface side T1. The front-rear joint section 841 has an inner end 841I which is an inner end in the front-rear direction L. The front-rear joint 841 has an inner edge EI which is an inner edge in the width direction W. The width engagement portion 842 is located on the outer side in the width direction W than the rising portion 82, and is not joined to rise to the skin surface side T1. The width joint 842 has an inner edge 842EI which is an inner side edge in the width direction W. The rising portion 82 can rise in the front-rear direction L from an inner edge 841I of the front-rear joint portion 841 as a base point, and can rise in the width direction W from an inner edge 842EI of the width joint portion 842 as a base point.

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

A low shrink region and a pair of shrink regions are illustrated. The absorbent article 1 is provided with a low contraction region and a pair of contraction 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 retraction regions have a central low retraction region LER1, a thigh side low retraction region LER2 and a dorsal low retraction region LERR, and the pair of retraction regions has a pair of side retraction regions ER1, a pair of thigh side retraction regions ER2 and a dorsal side retraction region ERR.

The central low-shrinkage region LER1 is a region that extends across the width center WC, which is the center of the absorbent article 1 in the width direction W, in the front body area 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 edges of the side contracted regions ER1 to the side joined portions 16, or may extend to positions outside the side joined portions 16 in the width direction W. The central low shrinkage region LER1 has a lower shrinkage force in the width direction W than the side shrinkage region ER 1. Likewise, the strand-side low shrinkage region LER2 crosses the width center WC in the front waisted region S1. The pair of strand-side contracted regions ER2 are adjacent to both outer sides of the strand-side low contracted region LER2 in the width direction W. The pair of thigh-side contracted side regions ER2 may extend linearly in the width direction from the inner edges of the thigh-side contracted side regions ER2 to the side joint sections 16, or may extend to the outer side in the width direction W than the side joint sections 16. The widthwise W contractive force of the strand-side low-contraction region LER2 is lower than the widthwise W contractive force of the strand-side contraction region ER 2. The central low shrinkage region LER1 may be located outward in the front-rear direction L from the thigh-side low shrinkage region LER 2. In addition, the dorsal low contraction region LERR crosses the width center WC at the posterior torso region S2. The pair of dorsal lateral contraction regions ERR are adjacent to both outer sides of the dorsal low contraction 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 joined portions 16, or may extend to positions outside the side joined portions 16 in the width direction W. The shrinkage force in the width direction W of the back-side low-shrinkage region LERR is lower than the shrinkage force in the width direction W of the back-side shrinkage region ERR.

In order to provide the low shrinkage region, the following method 1 or 2 can be used, for example. In the method 1, the discontinuous elastic member 55N may not be disposed in an extended state, so that the contractive force in the width direction W of the low-contractive region is lower than the contractive force in the width direction W of the pair of contractive regions. For example, an adhesive (e.g., a Hot Melt Adhesive (HMA)) for fixing the discontinuous elastic member 55N is disposed in a region where the discontinuous elastic member 55N is disposed in an extended state, and an adhesive for fixing the discontinuous elastic member 55N is not disposed in a low shrinkage region. Thereby, the discontinuous elastic member 55N is fixed in an extended state in the region where the adhesive is disposed. In a region sandwiched by regions where no adhesive is disposed and where an adhesive is disposed in the width direction W, since the extended state of the discontinuous elastic member 55N is maintained, the discontinuous elastic member 55N is cut in the region, and the cut discontinuous elastic member 55N contracts. Thus, the discontinuous elastic member 55N having contractibility (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 by the above-described method 1, the discontinuous elastic member 55N may have a fixed portion and a non-fixed portion. The fixing portion is a portion disposed 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 contraction region may be cut (cut into large pieces) at a plurality of places to form the discontinuous elastic members 55N 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. Thereby, the discontinuous elastic member 55N does not continuously extend in the width direction W. In this case, even if the discontinuous elastic member 55N is fixed in an extended state, the contractive force of the discontinuous elastic member 55N is reduced. In addition, since the discontinuous elastic member 55N having a residual contractive force is disposed (fixed) in the low-contractive region provided by the above-described method 2, the contractive force of the low-contractive region provided by the method 2 is greater than 0, and therefore greater than the contractive force of the low-contractive region provided by the method 1.

A low shrinkage region and a pair of shrinkage regions can be defined by measuring the shrinkage force of each region. The "shrinkage force" of each region can be measured by the following method. When the contraction force of each region is measured, a sample to be measured is prepared. Both ends of the sample were held by a chuck (holding tool) of a tensile tester. At this time, the distance between the chucks was set to 100 mm. Next, one of the chucks in the width direction W is moved while the other chuck is fixed, so as to change the distance between the chucks. The moving speed of the chuck at this time was set to 300 mm/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% (certain width) was defined as "shrinkage force".

In addition, the low contraction region and the pair of contraction regions may be defined by the arrangement of the waist elastic member 55. Specifically, the boundary between the low shrinkage region and the shrinkage region in the width direction W, that is, the side edge of the low shrinkage region and the inner edge of the shrinkage region can be defined by the inner end edge of the discontinuous elastic member 55N continuously extending from the outer portion of the exterior body 50 to the inner side in the width direction W. In the case where the low shrinkage region is provided by the method 1, the side edges of the low shrinkage region and the inner side edges of the shrinkage region may be inner sides of the fixing portions 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 edge of the contracted region is the position of the outermost discontinuous elastic member 55N in the front-rear direction L, and the inner edge of the contracted region is the position of the innermost discontinuous elastic member 55N in the front-rear direction L. The outer edge of the low shrinkage region is defined by an imaginary line connecting the inner edges of the outermost discontinuous elastic members 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 an imaginary line connecting the inner edges of the innermost discontinuous elastic members 55N adjacent to the low shrinkage region on both sides in the width direction W. In addition, in the case of 1 discontinuous elastic member 55N, 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 an imaginary line connecting the inner edges of the outer edges of the discontinuous elastic members 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 limited by an imaginary line connecting the inner edges of the discontinuous elastic members 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 on the outer side in the front-rear direction L than the minimum width MI. The central low shrink region LER1 has a minimum side edge EMI which is the side edge of the central low shrink region LER1 at the location of the minimum width MI and a maximum side edge EMA which is the side edge of the central low shrink region LER1 at the location of the maximum width MA. As shown in fig. 4 and the like, the width of the central low shrinkage region LER1 may become wider as going outward in the front-rear direction L. Therefore, the inner end edge of the 1 st discontinuous elastic member 55N1 continuously extending from the outer portion of the outer package 50 to the inner side in the width direction W is located outward in the width direction W as the 1 st discontinuous elastic member 55N1 located outward in the front-rear direction L is located.

(4) Relationship with the pelvis

The present inventors have conducted intensive studies and, as a result, have focused on the finding that the pelvis is designed to achieve both the function of retaining excrement and the feeling of wearing of the wearer, and have completed the present invention. Specifically, as shown in fig. 8 and 9, the height of the iliac crest IC, which is the upper edge of the ilium IB of the wearer, increases from the center of the ventral or dorsal side of the wearer to the lateral side. Therefore, in the peripheral region, the fat, the internal organs, and the like of the wearer are less covered with the ilium IB as they go outward in the front-rear direction L, and the abdomen and the back are more likely to protrude outward of the body. Therefore, as shown in fig. 10, the circumferential length CL of the body circumference of each of the abdomen side and the back side of the wearer is longer as the body circumference region goes outward in the front-back direction L, and the body circumference region of the absorbent article 1 is more likely to tighten the body of the wearer. Further, the force that is applied from the outside of the longer circumferential length CL of the torso surrounding region to the inside of the shorter circumferential length CL of the torso surrounding region in the front-rear direction L by contraction of the waist elastic member 55 is likely to act on the front torso surrounding region S1, and particularly, the portion of the torso surrounding region having the longer circumferential length CL is likely to slip off.

In the absorbent article 1 of the embodiment, the central low shrinkage region LER1 and the pair of side shrinkage regions ER1 are provided, and the central low shrinkage region LER1 has the minimum width MI and the maximum width MA. The maximum width MA is located outward in the front-rear direction L from the minimum width MI. As a result, as shown in fig. 8, the portion of the maximum width MA of the central low shrinkage region LER1 can cover a portion in which the circumferential length CL of the body circumference is longer than the portion of the minimum width MI. Thus, a part having a longer circumferential length CL of the body circumference (i.e., a part that is more likely to tighten the body of the wearer) can be covered with the part having the maximum width MA of the central low-shrinkage region LER1, which has a weaker shrinkage force than the side shrinkage regions ER 1. Therefore, the region where the contraction force is weak and the body of the wearer is not easily tightened (i.e., the central low-contraction region LER1) can be increased by the portion that is more likely to tighten the body of the wearer, and the wearing feeling of the wearer can be improved. In addition, in a portion where the circumferential length CL of the body periphery is long, the contraction force in the width direction W is weakened, and the force from the outer side to the inner side in the front-rear direction L can be reduced. This makes it difficult for the longer part CL of the body circumference to slip off, thereby improving the wearing feeling of the wearer.

In addition, since the height of the iliac crest IC increases from the center of the ventral side or the dorsal side toward the lateral side in the peripheral region, the region covered with the ilia IB, such as the viscera and fat, increases on the lateral side of the wearer as compared with the center of the ventral side or the dorsal side. Therefore, even if the side contraction region ER1 is brought into close contact with the body of the wearer, it is less likely to press internal organs, fat, and the like. The pair of side contracted regions ER1 are adjacent to both outer sides of the central low contracted region LER1 in the width direction W, and the pair of side contracted regions ER1 can be arranged closer to the side of the wearer than the central low contracted region LER 1. When the pair of side contracted regions ER1 are disposed on the sides of the wearer, the wearer is less likely to feel discomfort even if the front waistline region S1 is brought into close contact with the body of the wearer by contraction of the pair of side contracted regions ER 1. Therefore, the wearing feeling 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 preventive cuff 80 rises toward the skin surface side T1 to intercept excrement and prevent side leakage of excrement. Since the rising portion 82 starts rising toward the skin surface side T1 from the inner end edge 841I of the front-rear joint portion 841 of the leakproof bead 80 as a starting point in the front-rear direction L, a region on the inner side in the front-rear direction L than the inner end edge 841I of the front-rear joint portion 841 becomes a holding region for holding excrement. Here, in the absorbent article 1, the inner end edge IE of the central low shrinkage region LER1 is located outward in the front-rear direction L from the inner end edge 841I of the front-rear joint section 841. Thus, the central low-contraction region LER1, which has a weaker contraction force than the side contraction regions ER1, can be provided at a position farther from the excretory opening of excrement, which is normally located inward in the front-back direction L (i.e., the crotch side) than the body surrounding region than the holding region. In this case, the excrement can be held by the holding region, and the influence on the holding of the excrement can be suppressed as compared with the case where the central low contraction region LER1 is provided in the holding region. As a result, the wearing sensation of the wearer can be improved while maintaining the function of holding excrement, and the function of holding excrement and the wearing sensation of the wearer can be simultaneously satisfied.

When the side contracted region ER1 is contracted inward in the width direction W from the inner edge 841EI of the front-rear joint 841, the front-rear joint 841 is easily stretched inward in the width direction W. When the front and rear joint sections 841 are displaced inward in the width direction W, the base point of the rising section 82 is displaced inward in the width direction W, and the area of the holding region for holding excrement decreases. Here, in the absorbent article 1, the largest side edge EMA of the central low-shrinkage region LER1 is located outward in the width direction W from the inner side edge 841EI of the front-rear joint section 841. Accordingly, at least a part of the side contracted region ER1 (i.e., the side contracted region ER1 located outward in the width direction W from the maximum side edge EMA of the central low contracted region LER1) is not located inward in the width direction W from the inner side edge 841EI of the front and rear joint 841, and therefore the front and rear joint 841 can be made less likely to be stretched inward in the width direction W. As a result, the position in the width direction W of the raising base point of the raising portion 82 can be maintained, and the area of the holding region can be maintained. This can suppress leakage of excrement and improve the wearing feeling of the wearer, and therefore can achieve both the excrement holding function and the wearing feeling of the wearer.

In the embodiment, the 1 st bust region provided with the central low contraction region LER1 is the front bust region S1, that is, is disposed on the abdominal side of the wearer. Since the height of the iliac crest IC on the ventral side is lower than the height of the iliac crest IC on the dorsal side, the region covered with the iliac IB, such as the internal organs 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. By disposing the central low contraction region LER1 on the abdomen of the wearer, the region strongly tightening the abdomen of the wearer can be reduced, and the wearing feeling can be improved.

In the front body surrounding region S1, the height of the iliac crest IC increases from the center to the sides, and therefore the region covered with the ilia IB decreases in the center outward in the front-back direction L (toward the waist opening 17). Therefore, the more outward in the front-rear direction L, the more easily the body of the wearer protrudes, and the longer the circumferential length CL around the body of the wearer is. In the present embodiment, the width of the central low shrinkage region LER1 increases outward in the front-rear direction L. As a result, the width of the central low contraction region LER1 becomes wider according to the circumferential length CL of the body circumference of the wearer, and the region that does not tighten the body of the wearer is increased. As a result, the wearing sensation can be improved.

In addition, as shown in fig. 7, the front-rear joint section 841 may overlap the side contracted region ER1 in the thickness direction T. Since the front-back joint 841 is in close contact with the body of the wearer due to contraction of the side contracted region ER1, a gap is less likely to be formed between the body of the wearer and the front-back joint 841. Therefore, leakage of excrement passing through the gap can be suppressed.

In addition, the width of the central low shrinkage region LER1 may become wider as going outward in the front-rear direction L. In this case, as shown in fig. 7, the central low shrinkage region LER1 may have a wide-width region WR and a narrow-width region NR. The wide region WR extends from a position inward in the width direction W of the outer side edge 841EO of the front-rear joint section 841 to a position outward in the width direction W of the outer side edge 841EO of the front-rear joint section 841. The narrow region NR is a region inward in the front-rear direction L from the wide region WR. The length LW in the front-rear direction L of the wide region WR may be longer than the length LN in the front-rear direction L of the narrow region NR. The containment beads 80 extend in the front-rear direction L in the crotch region S3, and therefore the front-rear joint 841 is disposed in accordance with the width of the wearer' S thigh. Therefore, the length LW is longer than the length LN, and the ratio of the area of the central low-shrinkage region LER1 disposed in the region outside the position corresponding to the wearer's crotch width in the width direction W can be increased. This makes it possible to improve the wearing feeling without strongly tightening the body of the wearer with a large area in the region outside the position corresponding to the width of the wearer's thigh in the width direction W.

As shown in fig. 11, the abdomen side of the wearer is easily bent in the direction of the non-skin surface side T2 (in the direction away from the body of the wearer) in the front-back direction L at a portion inside the absorbent core 31 with respect to the lower end of the abdomen due to sitting posture, forward bending, or the like. Here, since the difference in rigidity is large in the front and rear 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 is likely to be the origin of bending of the absorbent core 31. As shown in a of fig. 11, the inner end edges 841I of the front-rear joint portions 841 are located outward in the front-rear direction L from the rear end edge 31LR of the waist low-basis-weight portion 31L, so that the inner end edges 841I of the front-rear joint portions 841 are easily located outward in the front-rear direction L from the bending base point of the absorbent core 31. Thereby, the rising portion 82 can rise from the bending base point of the absorbent core 31. Therefore, as shown in fig. 11B, a gap G is less likely to be formed between the rising base point of the rising portion 82 and the bending base point of the absorbent core 31, and leakage of excrement from the gap G can be suppressed. Further, the inner portion of the absorbent core 31 is distant from the wearer's body, and the inner portion of the absorbent core 31 is also distant from the apex of the standing portion 82 which is present closer to the wearer's body than the absorbent core 31. As a result, the height of the rising 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 continuously extending from one end to the other end of the front waistline region S1 at a position inward in the front-to-back direction L with respect to the central low stretch 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 near the ilium IB of the wearer, and the front waistline region S1 can be continuously brought into close contact with each other in the width direction W. Here, since internal organs, fat, and the like located inside the ilium IB are not easily compressed, the wearer is not likely to feel discomfort even if the front surrounding region S1 is brought into close contact with the body of the wearer in the vicinity of the ilium IB. Further, 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 central low contraction region LER1 is disposed in a region above the ilium IB, that is, a region having an increased circumferential length of the body circumference. Therefore, the region that does not strongly tighten the body of the wearer can be arranged longer in the portion where the circumference of the body circumference is longer and the wearing feeling is liable to deteriorate, and the wearing feeling of the wearer can be improved.

In addition, the contraction force of the 1 st continuous elastic member 55C1 may be greater than the contraction force of the other waist elastic members 55. Therefore, there are regions where the contraction force is higher than the central low contraction region LER1 and the pair of side contraction regions ER1 at positions inward 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 contractive force is higher than the thigh-side low-contraction region LER2 and the pair of thigh-side contracted regions ER2 at positions outside in the front-rear direction L than the thigh-side low-contraction region LER2 and the pair of thigh-side contracted regions ER 2. The other waist elastic members 55 may be the same waist elastic member 55 in the front waistline region S1 and the back waistline region S2 as the first continuous elastic member 55C 1. 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 front surrounding region S1 can be firmly attached to the body of the wearer by the 1 st continuous elastic member 55C1 having a large contractive force in the vicinity of the ilium IB where the wearer is not likely to feel uncomfortable due to the fact that the internal organs, fats, and the like are not compressed.

Further, the 1 st continuous elastic member 55C1 may be disposed rearward from the front end edge 16F of the る side joined portion 16 at the front waistline region S1 by 5% to 20% of the entire length in the front-rear direction L of the absorbent article 1. This makes it easy to position the 1 st continuous elastic member 55C1 near the ilium IB of the wearer. In the front torso-surrounding region S1, the 1 st continuous elastic member 55C1 may be disposed forward from the rear end edge 16R of the side joined portion 16 by 20% to 90%, preferably forward by 40% to 70%, and more preferably forward by 45% to 65% of the entire length of the side joined portion 16 in the front-rear direction L. This makes it easy to position the 1 st continuous elastic member 55C1 near the ilium IB of the wearer.

The contraction force of the waist elastic member 55 can be measured, for example, in the following manner. The length H0 in the width direction W of the effective length portion of the waist elastic member 55 was measured in a state where the absorbent article 1 was maximally extended in the front-rear direction L to such an extent that the wrinkles generated in the absorbent article 1 could no longer be recognized. 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.

In addition, 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 waistline region S1 can be reliably brought into close contact with the body of the wearer. In addition, the waist low basis weight portion 31L is low in basis weight and therefore is less likely to swell even when absorbing excrement. Therefore, even after excretion, the contraction of the 1 st continuous elastic member 55C1 is not easily hindered, and therefore the front waistline region 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 the outer end edge 31O in the front-rear direction L of the absorbent core 31 in the thickness direction T. The outer end edge 31O of the absorbent core 31 is less rigid than a portion on the inner side in the front-rear direction L than the outer end edge 31O of the absorbent core 31 (hereinafter referred to as an inner core portion), and therefore tends to contract in the width direction W. In the case where the outer end edge 31O of the absorbent core 31 is contracted in the width direction W, the greater the contraction difference between the outer end edge 31O of the absorbent core 31 and the inner core portion, the more easily the inner core portion is separated from the body of the wearer in order to allow the force applied in the width direction W to escape. In the case where the central low shrinkage region LER1 overlaps the outer end edge 31O of the absorbent core 31 in the thickness direction T, the outer end portion of the absorbent core 31 including the outer end edge 31O of the absorbent core 31 can be made less likely to shrink in the width direction W. This makes it difficult for the absorbent core 31 to move away from the body, and the excrement can easily reach the absorbent core 31, thereby further suppressing the leakage of the excrement.

The central low shrinkage region LER1 may overlap the extension 24 in the thickness direction T. As described above, the abdomen and the back are more likely to protrude outward of the body as going outward in the front-rear direction, and therefore the abdomen and the back protrude outward of the body in the region overlapping with the extending portion 24 in the thickness direction (hereinafter referred to as an extending region) than in the region overlapping with the absorbent core 31 in the thickness direction T (hereinafter referred to as a core region). Here, the thickness of the extension region is thinner than that of the core region in an amount without the absorbent core 31. In the case where the width of the peripheral region is constant, the wearing pressure is lower as the thickness is thinner, and therefore the wearing pressure in the extension region is lower than that in 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 low wearing pressure and not being strongly tightened can be disposed at a portion protruding the abdomen and back from 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 C of fig. 10, the extended portion 24 contracts in the width direction W with a weak force, so that a small gap can be generated between the extended portion 24 and the wearer's body. As a result, leakage of excrement can be suppressed by reducing the gap, and breathability of the region that is prone to become hot due to overlapping with the extension portion 24 at the front body surrounding region S1 can be improved. The uncomfortable feeling of the wearer caused by hot flashes can be reduced and the wearing feeling can be improved.

The central low shrinkage region LER1 may overlap with a region outside the outer end edge 24F of the extension portion 24 in the front-rear direction L in the thickness direction T. The abdomen and back portions protrude outward of the body from the region (hereinafter referred to as an outer region) outward in the front-rear direction L from the outer end edge 24F of the extension portion 24 than the extension region. The thickness of the outer region is thinner than that of the extended region by the amount without the extended portion 24, so that the wearing pressure of the outer region is lower than that 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 having a low fitting pressure and not being strongly tightened can be disposed at the portion where the abdomen and back are protruded from the extension region, and the wearing feeling of the wearer can be further improved.

The maximum side edge EMA of the central low-shrinkage region LER1 may be disposed outward of the side edge 31E of the absorbent core 31. Thus, at least a part of the side contracted region ER1 is not disposed inward in the width direction W of the side edge 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, so the absorption area of the absorbent core 31 can be ensured, and leakage of excrement can be suppressed.

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

The maximum side edge EMA of the central low shrinkage region LER1 may be disposed outward of the side edge 20E of the absorbent main body 20. Thus, at least a part of the side contraction region ER1 is not disposed inward of the side edge 20E of the absorbent main body 20 in the width direction W, 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 body 20 is less likely to contract in the width direction W, so that the area of the absorbent body 20 can be ensured, and leakage of excrement from the absorbent body 20 can be suppressed.

In addition, the maximum side edges EMA of the central low contraction region LER1 may be located further outward than the leg elastic members 75 in the width direction W. When the absorbent article 1 includes a plurality of leg elastic members 75, the maximum side edges EMA may be located at least on the outer side in the width direction W than the innermost leg elastic member 75, or may be located on the outer side than the outermost leg elastic member 75. The leg elastic members 75 contract in the front-back direction L, so that the leg gathers 70 in which the leg elastic members 75 are disposed can be made to follow the leg circumferences of the wearer, and leakage of excrement to the outside can be prevented. Here, the maximum side edges EMA of the central low-contraction region LER1 are positioned outward of the leg elastic members 75, so that at least a part of the side contraction regions ER1 are not positioned inward of the leg elastic members 75 in the width direction W, and therefore the leg elastic members 75 can be made less likely to stretch inward in the width direction W. As a result, the position in the width direction W of the leg gathers 70 can be maintained, and the area of the holding region that holds excrement can be maintained.

In addition, the smallest side edge EMI of the central low shrinkage region LER1 may be located inward of the leg elastic members 75 in the width direction W. When the absorbent article 1 includes a plurality of leg elastic members 75, the minimum side edge EMI may be positioned inward of the outermost leg elastic member 75 or inward of the innermost leg elastic member 75. The leg elastic members 75 are brought closer to the wearer's body side by contraction of the side contraction regions ER 1. In the vicinity of the leg elastic members 75, the gap between the absorbent article 1 and the body of the wearer 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 inward of the side edge 31E of the absorbent core 31. Thereby, the side edges 31E of the absorbent core 31 are brought closer to the body of the wearer by contraction of the side contracted regions ER 1. In the vicinity of the side edge 31E of the absorbent core 31, the gap between the absorbent article 1 and the body of the wearer is reduced, and leakage of excrement can be suppressed.

In addition, the strand-side low contraction region LER2 may overlap the absorbent core 31 in the thickness direction T. The portion of the absorbent core 31 that overlaps the low contraction force thigh-side low contraction region LER2 in the thickness direction T is less likely to contract in the width direction W. Thus, the absorption area of the absorbent core 31 can be secured, and leakage of excrement can be suppressed.

In addition, the side edges 31E of the absorbent core 31 may overlap the thigh-side contracted region ER2 in the thickness direction T. Thus, the contraction of the thigh-side contracted region ER2 causes a force to be applied to the side edge 31E of the absorbent core 31 outward in the width direction W, 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 secured, and leakage of excrement can be suppressed.

Further, the inner edge of the thigh-side contracted region ER2 may be located outward of the side edge of the waist low basis weight portion 31L in the width direction W. Thus, even if the thigh-side contracted region ER2, which has a higher contraction force than the thigh-side low contracted region LER2, is contracted in the width direction W, the force that contracts the waist low basis weight portion 31L in the width direction does not act on the waist low basis weight portion 31L. Further, the waist low portion 31L is stretched outward in the width direction W by contraction of the side contraction region ER 1. This makes the waist low-basis weight portion 31L, which has lower rigidity than the surroundings and is likely to contract in the width direction W, less likely to contract in the width direction W, and therefore, the absorbent area of the absorbent core 31 can be secured, and leakage of excrement can be suppressed.

Further, the inner edge of the thigh-side contracted region ER2 may be located further outside than the slit 35. The slits 35 of the absorbent core 31 are less rigid than the surroundings, and therefore are likely to be crushed in the width direction W. Here, the inner edge of the thigh-side contracted region ER2 is positioned further outward in the width direction W than the slit 35 of the absorbent core 31. Thus, even if the strand-side contracted region ER2, which is stronger in contraction force than the strand-side low contracted region LER2, is contracted in the width direction W, a force to contract the slits 35 in the width direction W does not act on the slits 35. This makes the slit 35 less likely to be crushed in the width direction W. When the slits 35 are not crushed in the width direction W, a difference in rigidity occurs in the width direction W due to the slits 35, and therefore the absorbent core 31 can be easily bent in the width direction W from the slits 35. By curving the absorbent core 31 in the width direction W, the absorbent core 31 can be easily accommodated in the crotch region S3, and 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 in 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 thigh-side low shrinkage region LER2 in the front-rear direction L with respect to the length W2 in 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 short-aged child, the change in the circumferential length CL of the abdominal circumference in the front-rear direction L is greater than that of an adult. Therefore, the circumferential length CL of the body circumference on the ventral side starts to increase at a position more anterior-posterior than the ilium IB in the L direction, depending on 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 contraction region LER1), the width of the central low contraction region LER1 can be made to widen early in accordance with the girth CL of the body circumference of a young child of low age. This makes it possible to arrange the region that does not tighten the body strongly in accordance with the circumferential length CL of the body circumference of the young child, and therefore, the wearing feeling of the young child can be improved.

The maximum side edge EMA which is easily arranged above the iliac crest IR may be located outward in the width direction W from the center in the width direction W of the side joining portion 16 and the side edge 20E of the absorbent main body 20. In addition, in consideration of the shape of the ilium IB, in order to secure a wide region in which the body is not strongly tightened at a position outside the absorbent body 20 in the width direction W, the length in the width direction W from the inner edge of the outermost 1 st discontinuous elastic member 55N in the front-rear direction L among the 1 st discontinuous elastic members 55N overlapping the absorbent body 20 in the thickness direction T to the inner edge of the innermost 1 st discontinuous elastic member 55N in the front-rear direction L among the 1 st discontinuous elastic members 55N not overlapping the absorbent body 20 in the thickness direction T may be the largest among the lengths in the width direction W between the inner edges of the 1 st discontinuous elastic members 55N1 adjacent in the front-rear direction L.

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

(5) Other embodiments

The above-described embodiments and modifications are intended to be illustrative, and the present invention may be implemented in other forms. For example, the central low shrinkage region LER1 may be provided in the rear body area S2, or the central low shrinkage region LER1 may be provided in both the front body area S1 and the rear body area S2.

In addition, the minimum side edge EMI of the central low shrinkage region LER1 may be located outward of the side edge of the absorbent core 31 in the width direction W. Accordingly, all the side contracted regions ER1 are not disposed inward in the width direction W relative to 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, so the absorption area of the absorbent core 31 can be ensured, and leakage of excrement can be suppressed.

Further, the inner edge of the thigh-side contracted region ER2 may be located inward of the side edge of the absorbent main body 20 in the width direction W. Further, the inner edge of the dorsal side contracted region ERR may be located more inward than the inner edge of the thigh side contracted region ER2 in the width direction W. Since the back side of the absorbent main body 20 is held by the wearer and touches the arms of the caregiver or touches the floor in a sleeping posture, the back side of the absorbent main body 20 is more likely to be deviated in the width direction than the abdomen side of the absorbent main body 20. When the inner edge of the back-side contracted region ERR is located inward of the inner edge of the thigh-side contracted region ER2, the stretching force applied to the back-side contracted region ERR of the absorbent main body when the absorbent main body is displaced in the width direction can be made larger than the stretching force applied to the thigh-side contracted region ER 2. Accordingly, the stretching force of the back-side contracted region ERR becomes larger in accordance with the displacement in the width direction W of the absorbent main body 20, and therefore, the back-side absorbent main body 20 can be made less likely to be displaced in the width direction W in particular.

It should be noted that the structures of the absorbent article 1 of the above-described embodiment, each modification, and other embodiments can be combined as appropriate. The present invention is not limited to the contents described in the present specification. The present invention can be implemented in modified and altered forms without departing from the spirit and scope of the present invention defined by the claims.

In addition, the entire contents of japanese patent application nos. 2019-239805 and 2019-239810, which were filed on 27.12.2019, are incorporated in the present specification by reference.

Description of the reference numerals

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

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 between the 1 st body peripheral region and the 2 nd body peripheral region in the front-rear direction,

the absorbent core contains an absorbent material and is,

the waist elastic member is disposed in the 1 st circumferential region in an elongated state in the width direction,

the absorbent article is provided with a central low shrinkage region that crosses the width center, which is the center in the width direction of the absorbent article, in the 1 st girth region, and a pair of side shrinkage regions that are adjacent to both outer sides of the central low shrinkage region in the width direction,

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

wherein the content of the first and second substances,

the absorbent article having a pair of containment beads extending in the front-rear direction at least in the crotch region and disposed on either side of the width center,

the pair of leakage-proof beads have a rising portion and front and rear engaging portions,

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

the front and rear joining portions are located on the outer side in the front-rear direction than the rising portion and are joined so as not to rise toward the skin surface side,

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

an inner end edge of the central low shrinkage region is located outward of an inner end edge of the front-rear joint section in the front-rear direction.

2. The absorbent article of claim 1,

the front and rear joint portions overlap the side contracted regions in the thickness direction.

3. The absorbent article according to claim 1 or 2, wherein,

the 1 st girth region is disposed on the ventral side of the wearer,

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

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

the wide region extends from a position inward in the width direction of the outer edge of the front-rear joint part to a position outward in the width direction of the outer edge of the front-rear joint part,

the narrow width region is a region located inward in the front-rear direction than the wide width region,

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

4. The absorbent article according to any one of claims 1 to 3, wherein,

the 1 st body area is disposed on the ventral side of the wearer,

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

the waist low basis weight portion has a rear end edge in the 1 st torso-surrounding region,

the inner end edge of the front-rear joint portion is located further outward than the rear end edge of the waist portion low basis weight portion in the front-rear direction.

5. The absorbent article according to any one of claims 1 to 4, wherein,

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

6. The absorbent article according to claim 5,

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

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

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

7. The absorbent article of claim 6,

the central low shrinkage region overlaps with a region on the outer side in the front-rear direction than an outer end edge of the extension portion in the thickness direction.

8. 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 crotch region is sandwiched between the 1 st and 2 nd body peripheral regions in the front-rear direction,

the absorbent core contains an absorbent material and is,

wherein the content of the first and second substances,

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

the pair of leakage preventing curls has a rising portion and front and rear joining portions,

the central low shrinkage region has a minimum width and a maximum width, the maximum width being located on an outer side in the front-rear direction than the minimum width,

in the width direction, a side edge of the central low shrinkage region at the maximum width position, that is, a maximum side edge, is located outward of an inner edge of the front and rear joint portions.

9. The absorbent article of claim 8,

the maximum side edge of the central low shrinkage region is located outward of the side edge of the absorbent core in the width direction.

10. The absorbent article according to claim 8 or 9,

the pair of leakage preventing beads have a width joining portion that is located on the outer side in the width direction than the rising portion and 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 on the outer side in the width direction than the inner edge of the width joining portion.

11. The absorbent article according to any one of claims 8 to 10, wherein,

the absorbent article includes an absorbent main body having the absorbent core, extending from the crotch region to the 1 st body-surrounding region, and the maximum side edge of the central low-shrinkage region is located outward of the side edge of the absorbent main body in the width direction.

12. The absorbent article according to any one of claims 8 to 11,

the absorbent article has a leg elastic member that is disposed in a state of being stretched in the front-rear direction at least in the crotch region and at a position outside the absorbent core in the width direction,

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

13. The absorbent article according to any one of claims 8 to 12, wherein,

the absorbent article has a leg elastic member disposed in an extended state in the front-back direction at least in the crotch region at a position outside the absorbent core in the width direction,

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

14. The absorbent article according to any one of claims 8 to 13, wherein,

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

15. The absorbent article according to any one of claims 8 to 14, wherein,

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

16. The absorbent article according to any one of claims 1 to 15, wherein,

the 1 st body area is disposed on the abdominal side of the wearer.

17. The absorbent article according to any one of claims 1 to 16, wherein,

the width of the central low shrinkage region becomes wider as going to the outer side in the front-rear direction.

18. The absorbent article according to any one of claims 1 to 17,

the waist elastic member has a continuous elastic member continuously extending from one end portion to the other end portion of the 1 st torso-surrounding region at a position inward in the front-rear direction with respect to the central low-contractible region.

19. The absorbent article of claim 18,

the continuous elastic member has a larger contractive force than the other waist elastic members.

20. The absorbent article of claim 18 or 19,

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

21. The absorbent article of claim 18,

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

the thigh-side low-shrinkage region crosses the width center at a position on the inner side in the front-rear direction than the continuous elastic member in the 1 st torso-surrounding region,

the pair of thigh-side contracted regions are adjacent to both outer sides of the thigh-side low contracted region in the width direction at positions inward in the front-rear direction of the continuous elastic member,

the width-directional shrinkage force of the strand-side low-shrinkage regions is lower than the width-directional shrinkage force of the strand-side low-shrinkage regions,

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

22. The absorbent article of claim 21,

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

23. The absorbent article of claim 21 or 22,

the inner edges of the thigh-side contracted regions are located outward of the side edges of the waist low-basis-weight portions in the width direction.

24. The absorbent article according to any one of claims 21 to 23, wherein,

the absorbent core has a slit extending in the front-back direction in the crotch region,

an inner edge of the thigh-side contracted region is located more outward than the slit in the width direction.

25. The absorbent article according to any one of claims 21 to 24, wherein,

the 1 st girth region is disposed on the ventral side of the wearer,

the inclination of the longitudinal length of the central low shrinkage region with respect to the longitudinal length from the lateral edge at the position of the minimum width, i.e., the minimum side edge, to the lateral edge at the position of the maximum width, i.e., the maximum side edge, of the central low shrinkage region is smaller than the inclination of the longitudinal length of the strand-side low shrinkage region with respect to the longitudinal length from the lateral edge located outermost in the longitudinal direction to the minimum side edge of the central low shrinkage region.

26. The absorbent article according to any one of claims 21 to 25, wherein,

the 1 st torso-surrounding region is disposed on the ventral side of the wearer, the 2 nd torso-surrounding region is disposed on the back side of the wearer,

the absorbent article is provided with a back-side low-shrinkage region that spans the width center at the 2 nd girth region, and a pair of back-side shrinkage regions that are adjacent to both outer sides of the back-side low-shrinkage region,

the width-directional shrinkage force of the back-side low-shrinkage region is lower than the width-directional shrinkage force of the back-side shrinkage region,

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

the width of the dorsal low shrink regions is wider than the width of the thigh-side low shrink regions.

27. The absorbent article according to any one of claims 21 to 25,

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

the width-directional contractive force of the back-side low-contraction region is lower than the width-directional contractive force of the back-side contraction region,

an inner edge of the thigh-side contracted region is located more inward than a side edge of the absorbent main body in the width direction,

an inner side edge of the back-side contracted area is located more inward than the inner side edge of the thigh-side contracted area in the width direction.