JP7406989B2 - absorbent articles - Google Patents

Description

The present invention relates to an absorbent article having an absorbent core containing an absorbent material and a waist elastic member arranged in a widthwise extended state in the waist region.

Patent Document 1 has an absorbent core containing an absorbent material and a waist elastic member disposed in a state of being stretched in the width direction in the waist region, and is provided with a central low shrinkage region and a pair of side shrinkage regions. An absorbent article is disclosed. The central low shrinkage region straddles the center of the absorbent article in the width direction. The pair of side shrinkage regions are adjacent to both outer sides of the central low shrinkage region in the width direction. Further, the contraction force in the width direction of the central low contraction area is lower than the contraction force in the width direction of the side contraction areas. Since the wearer's body protrudes from the buttocks on the dorsal side, by making the maximum width of the central low-contraction area on the dorsal side larger than the maximum width of the central low-contraction area on the ventral side, the wearer's body protrudes on the dorsal side. It is not tightly tightened and the wearer does not feel uncomfortable.

On the other hand, by relatively increasing the shrinkage force of the side shrinkage regions adjacent to both outer sides of the central low shrinkage region in the width direction, deterioration of fit in the waist region is suppressed. This makes it difficult for the absorbent article to shift from the wearer's body, and allows the absorbent article to retain excrement without leaking to the outside. In the above-mentioned absorbent article, the wearability of the absorbent article is improved while maintaining the function of retaining excreta, which is the function of the absorbent article.

JP2017-537726A

In the above-mentioned absorbent article, the wearability of the absorbent article is improved by adjusting the maximum width of the central low-contraction region on the dorsal side relative to the maximum width of the central low-contraction region on the ventral side. Ta. For this reason, by focusing only on one side (ventral side or dorsal side) of the wearer's body, it has not been possible to achieve both the function of retaining excrement and the wearer's comfort.

Therefore, an absorbent article is provided that has an absorbent core containing an absorbent material, a waist elastic member disposed in a state of being stretched in the width direction in the waist region, and is provided with a central low shrinkage region and a pair of side shrinkage regions. Therefore, it is an object of the present invention to provide an absorbent article that can achieve both the function of retaining excrement and the comfort of the wearer.

The absorbent article according to one embodiment includes: a front-rear direction; a width direction perpendicular to the front-rear direction; a thickness direction; a waist region including a first waist region and a second waist region; and the first waist region. and a crotch region sandwiched between the second waist region in the front-rear direction, an absorbent core containing an absorbent material, and a waist elastic member disposed in the first waist region in a stretched state in the width direction. . a central low shrinkage region that straddles the width center that is the center of the absorbent article in the width direction in the first waist region; and a pair of side shrinkage regions that are adjacent to both outer sides of the central low shrinkage region in the width direction; is provided. The contraction force in the width direction of the central low contraction area is lower than the contraction force in the width direction of the side contraction areas. The central low shrinkage region has a minimum width and a maximum width located outside the minimum width in the front-rear direction. In the front-rear direction, an inner edge of the central low shrinkage region is located outside an outer edge of the absorbent core.

FIG. 1 is a schematic front view of an absorbent article according to this embodiment. FIG. 2 is a schematic plan view of the absorbent article according to this embodiment. 3A is a schematic cross-sectional view of the absorbent article along line F3A-F3A in FIG. 2, and FIG. 3B is a schematic cross-sectional view of the absorbent article along line F3B-F3B in FIG. 2. FIG. 4 is a schematic plan view of the absorbent article for explaining the waist elastic member. FIG. 5 is a schematic plan view of the absorbent article for explaining the low shrinkage region. FIG. 6 is a front view of the absorbent article for explaining the absorbent article in a worn state. FIG. 7 is a side view of the absorbent article for explaining the absorbent article in a worn state. 8A is a schematic cross-sectional view taken along line F8A-F8A in FIG. 6, FIG. 8B is a schematic cross-sectional view taken along line F8B-F8B in FIG. 6, and FIG. 8C is a schematic enlarged view of FIG. 8B. It is a diagram.

(1) Overview of Embodiments An absorbent article according to one aspect includes a waist region including a front-back direction, a width direction perpendicular to the front-back direction, a thickness direction, a first waist region, and a second waist region. a crotch region sandwiched between the first waist region and the second waist region in the front-rear direction; an absorbent core containing an absorbent material; and an absorbent core that is arranged in the first waist region in a state extending in the width direction. A waist elastic member. a central low shrinkage region that straddles the width center that is the center of the absorbent article in the width direction in the first waist region; and a pair of side shrinkage regions that are adjacent to both outer sides of the central low shrinkage region in the width direction; is provided. The contraction force in the width direction of the central low contraction area is lower than the contraction force in the width direction of the side contraction areas. The central low shrinkage region has a minimum width and a maximum width located outside the minimum width in the front-rear direction. In the front-rear direction, an inner edge of the central low shrinkage region is located outside an outer edge of the absorbent core. According to this aspect, it is possible to achieve both the function of retaining excrement and the comfort of the wearer.

According to one preferred embodiment, the first waist region is located on the ventral side of the wearer. The height of the iliac crest on the ventral side is lower than the height of the iliac crest on the dorsal side, so the area where internal organs and fat are covered by the ilium is smaller on the ventral side than on the dorsal side. . For this reason, the abdomen tends to protrude outward from the body more easily than the back. Therefore, by arranging the central low-contraction region on the wearer's abdomen, it is possible to reduce the region where the wearer's abdomen is strongly tightened and improve the wearing comfort.

According to a preferred aspect, the width of the central low shrinkage region increases toward the outside in the front-rear direction. In the waist area, the height of the iliac crest increases from the center to the sides, so in the center, the area covered by the iliac bones decreases as you move outward in the front-rear direction (towards the waist opening). Become. For this reason, the wearer's body tends to protrude more outward in the front-rear direction, and the circumference of the wearer's torso becomes longer. Therefore, by widening the width of the central low-contraction area toward the outside in the front-rear direction, the width of the central low-contraction area increases according to the circumference of the wearer's torso, and the area does not tightly tighten the wearer's body. increases. As a result, the wearing comfort can be improved.

According to a preferred aspect, the central low shrinkage region has an absorbent main body having a shrinkage force in the width direction greater than 0, having the absorbent core, and extending from the crotch region to the first waist region; The absorbent main body has an extension portion that extends further outward in the front-rear direction than the outer edge of the absorbent core in the front-rear direction, and the central low shrinkage region is located between the extension portion and the thickness direction. overlaps with By contracting the extending portion in the width direction with a weak force, a small gap can be generated between the extending portion and the wearer's body. As a result, while reducing the gap to suppress leakage of excrement, it is possible to improve breathability in the region of the first waist region that overlaps with the extension and tends to become stuffy. It is possible to reduce the wearer's discomfort due to stuffiness and improve the wearing comfort.

According to a preferred aspect, the absorbent article has the absorbent core and an absorbent main body extending from the crotch region to the first waist region, and the absorbent main body has the absorbent core. The central low shrinkage region has an extending portion extending further outward in the longitudinal direction than the outer edge in the longitudinal direction, and the central low shrinkage region has a thickness that is greater than the outer edge of the extending portion in the longitudinal direction. overlap in the horizontal direction. The region outside the outer edge of the extension in the front-back direction (hereinafter referred to as the "outer region") is located at a position where the abdomen and back are more outside the body than the region overlapping the extension in the thickness direction (hereinafter referred to as the "extension region"). It is more protruding towards. Since the thickness of the outer region is thinner than the thickness of the extension region due to the absence of the extension portion, the bonding pressure of the outer region is lower than that of the extension region. In addition, since the outer region overlaps the central low-contraction region, which has a low contraction force, in the thickness direction, the pressure applied to the abdomen and back protrusions is lower than that of the extension region, and it does not tighten as strongly. The outer region can be arranged to further improve the wearer's comfort.

According to a preferred aspect, in the width direction, a maximum side edge that is a side edge of the central low shrinkage region at the maximum width position is arranged outside a side edge of the absorbent core. Thereby, at least some of the side contraction regions are not arranged on the inner side in the width direction than the side edges of the absorbent core, so that the absorbent core can be made difficult to be pulled inward in the width direction. As a result, since the absorbent core becomes difficult to shrink in the width direction, the absorbent area of the absorbent core can be secured, and leakage of excrement can be suppressed.

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

According to a preferred aspect, the absorbent article has the absorbent core and an absorbent main body extending from the crotch region to the first waist region, and the absorbent article has the absorbent core at the maximum width position in the width direction. The largest side edge, which is the side edge of the central low shrinkage region, is located outside the side edge of the absorbent main body. As a result, at least some of the side contraction regions are not arranged on the inner side in the width direction than the inner edge of the absorbent main body, so that the absorbent main body can be made difficult to be pulled inward in the width direction. The absorbent main body is less likely to shrink in the width direction, making it easier to maintain a wide state. As a result, an area for holding excrement can be secured.

According to a preferred aspect, the waist elastic member is a continuous member that extends continuously from one side end to the other side end of the first waist region on the inside of the central low shrinkage region in the front-rear direction. It has an elastic member. By having the wearer wear the absorbent article such that the continuous elastic member is located near the wearer's ilium, the first waist region can be brought into continuous contact with the absorbent article in the width direction. Here, since the internal organs, fat, etc. that exist inside the ilium are not easily compressed, the wearer is unlikely to feel uncomfortable even if the first waist region is brought into close contact with the wearer's body near the ilium. On the other hand, when the wearer wears the absorbent article so that the continuous elastic member is located near the wearer's ilium, the central low-contraction region is located above the ilium, that is, around the waist. Placed in the area where the length increases. Therefore, in contrast to a portion where the circumference of the torso is long and the wearing comfort is likely to deteriorate, a long region that does not strongly tighten the wearer's body can be provided, and the wearing comfort for the wearer can be improved.

According to a preferred embodiment, the contraction force of the continuous elastic member is greater than the contraction force of other waist elastic members. When a wearer wears an absorbent article such that the continuous elastic member is located near the wearer's ilium, internal organs, fat, etc. located inside the ilium are not easily compressed. Therefore, the continuous elastic member having a large contractile force can firmly bring the first waist region into close contact with the wearer's body in the vicinity of the iliac bone where the internal organs, fat, etc. are not compressed and the wearer does not feel uncomfortable.

According to a preferred aspect, in the first waist region, a crotch-side low shrinkage region straddling the width center on the inner side of the continuous elastic member in the front-rear direction; , a pair of crotch side side contraction areas adjacent to both outside sides of the crotch side low contraction area in the width direction, and the contraction force of the crotch side low contraction area in the width direction is The contraction force in the width direction of the side contraction areas is lower, and the crotch side low contraction area overlaps the absorbent core in the thickness direction. The portion of the absorbent core that overlaps in the thickness direction with the crotch side low shrinkage region where the shrinkage force is low is difficult to shrink in the width direction, so the absorption area of the absorbent core can be secured and leakage of excrement can be suppressed.

According to a preferred aspect, the side edge of the absorbent core overlaps the crotch-side side contraction region in the thickness direction. Accordingly, due to the contraction of the crotch-side side contraction region, a force directed outward in the width direction acts on the side edges of the absorbent core, making it easier for the absorbent core to be pulled outward in the width direction. As a result, the side edges of the absorbent core are pulled outward in the width direction, and the absorbent core is stretched outward in the width direction. The absorption area of the absorbent core can be secured, and leakage of excrement can be suppressed.

According to a preferred aspect, the absorbent core has a slit extending in the front-rear direction in the crotch region, and in the width direction, an inner edge of the crotch-side side contraction region is located outside of the slit. do. The slit of the absorbent core has lower rigidity than the surrounding area, so it is easily crushed in the width direction. Here, the inner edge of the crotch-side side contraction area is located outside the slit of the absorbent core in the width direction. Therefore, even if the crotch side side contraction area, which has a stronger contraction force than the crotch side low contraction area, contracts in the width direction, the force that causes the slit to contract in the width direction does not act on the slit. This makes it difficult for the slit to be crushed in the width direction. If the slits are not crushed in the width direction, the slits cause a difference in rigidity in the width direction, so that the absorbent core can be easily bent in the width direction using the slits as a base point. By bending the absorbent core in the width direction, it becomes easier to store the absorbent core in the crotch area, thereby improving the wearing comfort.

According to a preferred aspect, the first waist region is disposed on the ventral side of the wearer, and the width of the central low contraction region increases toward the outside in the front-back direction, and The length in the front-rear direction relative to the length in the width direction from the smallest side edge that is the side edge of the central low shrinkage region at the position to the largest side edge that is the side edge of the central low shrinkage region at the minimum width position The slope is the slope of the length in the front-back direction with respect to the length in the width direction from the outermost side edge of the crotch side low-shrinkage region in the front-back direction to the minimum side edge of the central low-shrinkage region. smaller than In young infants who are short in stature, the circumference of their ventral torso changes significantly in the anteroposterior direction compared to adults. Therefore, the circumference of the ventral trunk begins to increase from a distance closer to the ilium on the outer side of the ilium in the anteroposterior direction. Therefore, by reducing the slope of the side edges of the central low-contraction area (the slope from the minimum side edge to the maximum side edge), the width of the central low-contraction area can be made faster according to the circumference of the infant's torso. can be widened to Thereby, it is possible to arrange a region that does not strongly tighten the body according to the circumference of the torso of a young infant, so that the wearing comfort of the young infant can be improved.

(2) Overall schematic configuration of absorbent article An absorbent article 1 according to an embodiment will be described using FIGS. 1 to 8. The absorbent article 1 is, for example, a pants-type disposable diaper, a tape-type disposable diaper, or a shorts-type sanitary napkin. The absorbent article 1 of the embodiment is a pants-type disposable diaper. It should be noted that the drawings are schematic and the ratio of each dimension may differ from the actual one. In the schematic cross-sectional view, each member may be spaced apart in the thickness direction T for convenience of explanation, but in an actual product, each member is in contact with the thickness direction T.

As shown in FIG. 1, the absorbent article 1 has a front-back direction L and a width direction W perpendicular to the front-back direction L. As shown in FIG. The longitudinal direction L is defined by a direction extending toward the front side of the body and the rear side of the body. In other words, the front-back direction L is a direction extending back and forth in the developed absorbent article 1. Further, the absorbent article 1 has a thickness direction T that is perpendicular to both the front-rear direction L and the width direction W. The thickness direction T extends to a skin side T1 facing the wearer and a non-skin side T2 opposite to the skin side.

The absorbent article 1 has a waist region constituted by a first waist region and a second waist region, and a crotch region S3 sandwiched between the first waist region and the second waist region in the front-rear direction. In this embodiment, the first waist region is a front waist region S1 located on the ventral side of the wearer. The front waistline region S1 is a region facing the front waistline (abdomen) of the wearer. The second waistline region is a rear waistline region S2 located on the back side of the wearer. The rear waistline region S2 is a region facing the rear waistline (back) of the wearer. The crotch region S3 is a region located in the crotch of the wearer and arranged between the front waist region S1 and the back waist region S2.

The absorbent article 1 may include an absorbent main body 20 and an exterior body 50. The absorbent main body 20 may be configured separately from the exterior body 50. The absorbent main body 20 is arranged at least in the crotch region S3. The absorbent main body 20 may extend in the front-rear direction L from the crotch region S3 to the front waist region S1, and may extend in the front-rear direction L from the crotch region S3 to the rear waist region S2. The absorbent main body 20 may have an extending portion 24 that extends further outward in the front-rear direction L than the outer edge of the absorbent core 31 in the front-rear direction L. The absorbent main body 20 may overlap the exterior body 50 in the thickness direction T in the front waist region S1 and the back waist region S2. The exterior body 50 is arranged at least in the waist region. The exterior body 50 may include a front exterior body 50A disposed in the front waist region S1 and a rear exterior body 50B disposed in the rear waist region S2.

As shown in FIG. 1, the absorbent article 1 includes a side joint that joins the outer side of the front outer body 50A disposed in the front waist region S1 in the width direction W and the outer side of the rear outer body 50B in the width direction W. 16. The side joint portion 16 is defined by a portion where the outer side of the front exterior body 50A and the outer side of the rear exterior body 50B are locked to each other. The side joint portion 16 may extend along the front-rear direction L in each of the front exterior body 50A and the rear exterior body 50B. With the side joints 16 formed, the absorbent article 1 includes a waist opening 17 through which the wearer's torso is passed, and a pair of leg openings 18 through which the wearer's legs are respectively inserted. is formed. The waist opening 17 may be defined by the front edge S1F of the front waist region S1 and the rear edge S2R of the rear waist region S2.

In the pants-shaped absorbent article 1, the crotch region S3 may be defined by the inner edge of the side joint portion 16 in the front-rear direction L. The boundary between the front waist region S1 and the crotch region S3 may be defined by the rear edge 16R of the side joint portion 16 in the front waist region S1. The boundary between the back waist region S2 and the crotch region S3 may be defined by the front edge 16F of the side joint portion 16 in the back waist region S2. Note that the crotch area S3 may be defined by the area in which the leg opening 18 is provided. The leg opening 18 is a portion recessed inward in the width direction W from the outer edge of the absorbent article 1. The boundary between the front waist area S1 and the crotch area S3 may be defined by the front edge of the leg opening 18. The boundary between the rear waist region S2 and the crotch region S3 may be defined by the rear end edge of the leg opening 18.

Note that the outer side portion in this specification is a portion that occupies a certain range in the width direction W including the outer edge in the width direction W, and the outer edge is the outer edge in the width direction W. In this specification, the inner part is a part occupying a certain range in the width direction W including the inner edge in the width direction W, and the inner edge is the inner edge in the width direction W. Further, the front end portion and the rear end portion in this specification are parts occupying a certain range in the front-back direction L including the edge in the front-back direction L, and the front end edge and the rear end edge are edges in the front-back direction L. The outer edge includes a front edge and a rear edge, and the outer edge includes a front edge and a rear edge.

The absorbent main body 20 may include an absorbent body 30, a top sheet 41, and a back sheet 42. The absorbent body 30 has at least an absorbent core 31 containing an absorbent material. The absorbent core 31 (absorbent material) may be made of, for example, at least one of pulp and superabsorbent polymer. The absorbent core 30 may include a core wrap 32 that covers the absorbent core 31. The core wrap 32 contacts the absorbent core 31 and covers at least one side of the absorbent core 31 in the thickness direction T. The core wrap 32 may sandwich the absorbent core 31 in the thickness direction T. The core wrap 32 may wrap the absorbent core 31 by being folded back on the side of the absorbent core 31. The core wrap 32 may be made of tissue, nonwoven fabric, or the like, for example. Further, the absorbent core 31 may have a slit 35 extending in the front-rear direction L in the crotch region S3. A pair of slits 35 may be arranged on the outside in the width direction W from the width center WC, which is the center of the absorbent core 31 in the width direction W. The top sheet 41 is located closer to the skin surface T1 than the absorber 30. The top sheet 41 faces the wearer's skin. The top sheet 41 only needs to have liquid permeability, and may be made of, for example, a nonwoven fabric. The back sheet 42 is located closer to the non-skin side T2 than the absorber 30. The back sheet 42 only needs to be liquid-impermeable, and may be made of a film, for example.

The exterior body 50 (front exterior body 50A and rear exterior body 50B) is arranged on the non-skin surface side T2 with respect to the absorbent main body 20. The exterior body 50 may be composed of a plurality of sheet members. Note that the exterior body 50 may include a sheet member disposed closer to the skin surface T1 than the absorbent main body 20. The exterior body 50 also includes a waist elastic member 55.

The front exterior body 50A may include a first front sheet 51F and a second front sheet 52F that is disposed closer to the skin surface T1 than the first front sheet 51F. The first front sheet 51F may be arranged on the non-skin surface side T2 with respect to the waist elastic member 55. The second front sheet 52F may be arranged closer to the skin side T1 than the waist elastic member 55. The outer portion of the first front sheet 51F in the front-rear direction L may be folded back to the skin side T1. The second front sheet 52F may be arranged on the non-skin side T2 from the portion of the first front sheet 51F that is folded back to the skin side T1. The first front sheet 51F and the second front sheet 52F may be made of, for example, nonwoven fabric.

The rear exterior body 50B may be spaced apart from the front exterior body 50A in the front-rear direction L. The rear exterior body 50B includes a first rear seat 51R and a first rear seat. The first rear sheet 51R may be arranged closer to the non-skin side T2 than the sex member 55, which may have the second rear sheet 52R arranged closer to the skin side T1 than the waist bullet 51R. The second rear sheet 52R may be arranged closer to the skin side T1 than the waist elastic member 55. The first rear sheet 51R and the second rear sheet 52R may be made of, for example, nonwoven fabric.

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

The waist elastic member 55 may be composed of a linear elastic member 55L that is a thread-like or string-like elastic member extending in the width direction W, or may be composed of a stretchable sheet 55S that is a sheet-like elastic member. The linear elastic member 55L may extend linearly along the width direction W. The length of the linear elastic member 55L in the front-rear direction L (that is, the thickness of the elastic member) may be, for example, less than 5 mm. The length of the elastic sheet 55S in the front-rear direction L may be, for example, 5 mm or more. In the embodiment, the waist elastic member 55 is composed of a linear elastic member 55L and an elastic sheet 55S. Specifically, the continuous elastic member 55C is composed of a linear elastic member 55L and an elastic sheet 55S, and the discontinuous elastic member 55N is composed of a linear elastic member 55L. The elastic sheet 55S constitutes a continuous elastic member 55C. The elastic sheet 55S may be arranged in the thickness direction T between the first front sheet 51F and the second front sheet 52F. The elastic sheet 55S may be arranged closer to the skin surface T1 than the linear elastic member 55L.

The front continuous elastic member 55CF constituted by the linear elastic member 55L may include a first continuous elastic member 55C1 and a second continuous elastic member 55C2. The first continuous elastic member 55C1 extends continuously from one side end of the front waist region S1 to the other side end on the inner side in the front-rear direction L of the central low contraction region LER1, which will be described later. The second continuous elastic member 55C2 extends continuously from one side end of the front waist region S1 to the other side end on the outer side of the central low shrinkage region LER1 in the front-rear direction L. The first continuous elastic member 55C1 has a width of 5% relative to the entire length of the absorbent article 1 in the front-rear direction L (from the front edge to the rear edge of the absorbent article 1) from the front edge 16F of the side joint portion 16 in the front waist region S1. % to 20% backward. Further, in the front waist region S1, the first continuous elastic member 55C1 extends from 20% to 90% forward, preferably 40%, of the entire length of the side joint 16 in the front-rear direction L from the rear end edge 16R of the side joint 16. 70% forward, more preferably 45% to 65% forward.

The front discontinuous elastic member 55NF constituted by the linear elastic member 55L may include a first discontinuous elastic member 55N1 and a second discontinuous elastic member 55N2. The first discontinuous elastic member 55N1 is composed of a plurality of linear elastic members 55L arranged at intervals in the front-rear direction L. The length of at least part of the plurality of linear elastic members 55L (first discontinuous elastic members 55N1) in the width direction W, that is, continuously from the outer side of the front waist region S1 toward the inner side in the width direction W. The length of extension is different. The second discontinuous elastic member 55N2 is arranged inside the first continuous elastic member 55C1 in the front-rear direction L. The first discontinuous elastic member 55N1 may linearly extend inward in the width direction W from the side joint portion 16 to the inner edge of the side contraction region ER1, which will be described later. Similarly, the second discontinuous elastic member 55N2 may linearly extend inward in the width direction W from the side joint portion 16 to the inner edge of the crotch side contraction region ER2, which will be described later.

The first discontinuous elastic member 55N1 is arranged at least in the side contraction region ER1, which will be described later. The first discontinuous elastic member 55N1 may be disposed discontinuously in the central low shrinkage region LER1. Further, the second discontinuous elastic member 55N2 is arranged at least in the crotch side contraction region ER2, which will be described later. The second discontinuous elastic member 55N2 may be disposed discontinuously in the crotch-side low contraction region LER2. The rear discontinuous elastic member 55NR is arranged at least in the dorsal side contraction region ERR, which will be described later. The rear discontinuous elastic member 55NR may be disposed discontinuously in the dorsal low contraction region LERR.

(3) Low shrinkage region and pair of shrinkage regions The low shrinkage region and pair of shrinkage regions will be explained. The absorbent article 1 is provided with a low shrinkage region and a pair of shrinkage regions. The low shrinkage region is a region in which the shrinkage force in the width direction W is lower than that of a pair of shrinkage regions adjacent in the width direction W. In the embodiment, the low shrinkage regions include a central low shrinkage region LER1, a crotch side low shrinkage region LER2, and a dorsal low shrinkage region LERR, and the pair of shrinkage regions include a pair of side shrinkage regions ER1, a pair of crotch side low shrinkage regions. It has a contraction region ER2 and a dorsal side contraction region ERR.

The central low shrinkage region LER1 is a region that straddles the width center WC, which is the center of the absorbent article 1 in the width direction W, in the front waistline region S1. The pair of side shrinkage regions ER1 are regions adjacent to both outer sides of the central low shrinkage region LER1 in the width direction W. The pair of side contraction regions ER1 may extend linearly in the width direction from the inner edge of the side contraction region ER1 to the side joint portion 16, and may extend to the outside of the side joint portion 16 in the width direction W. The shrinkage force in the width direction W of the central low shrinkage region LER1 is lower than the shrinkage force in the width direction W of the side shrinkage regions ER1. Similarly, the crotch side low shrinkage region LER2 straddles the width center WC in the front waist region S1. The pair of crotch side side contraction regions ER2 are adjacent to both outer sides of the crotch side low contraction region LER2 in the width direction W. The pair of crotch-side side contraction regions ER2 may extend linearly in the width direction from the inner edge of the crotch-side side contraction regions ER2 to the side joint portion 16, and may extend to the outside of the side joint portion 16 in the width direction W. . The contraction force in the width direction W of the crotch side low contraction region LER2 is lower than the contraction force in the width direction W of the crotch side side contraction region ER2. Note that the central low shrinkage region LER1 may be located on the outer side of the crotch side low shrinkage region LER2 in the front-rear direction L. Further, the dorsal low contraction region LERR straddles the width center WC in the rear waist region S2. The pair of dorsal side contraction regions ERR are adjacent to both outer sides of the dorsal low contraction region LERR in the width direction W. The pair of dorsal side contracted regions ERR may extend linearly in the width direction from the inner edge of the dorsal side contracted regions ERR to the side joint portion 16, and may extend to the outside of the side joint portion 16 in the width direction W. . The contraction force in the width direction W of the dorsal low contraction region LERR is lower than the contraction force in the width direction W of the dorsal side contraction region ERR.

In order to provide the low shrinkage region, for example, the following first method or second method can be used. In the first method, the contraction force in the width direction W of the low contraction area may be lower than the contraction force in the width direction W of the pair of contraction areas by not arranging the discontinuous elastic member 55N in a stretched state. For example, an adhesive (for example, hot melt adhesive (HMA)) for fixing the discontinuous elastic member 55N is disposed in a region where the discontinuous elastic member 55N is disposed in a stretched state, and a low shrinkage region is provided. No adhesive is provided to fix the discontinuous elastic member 55N. As a result, the discontinuous elastic member 55N is fixed in an expanded state in the area where the adhesive is placed. In the area where no adhesive is placed and which is sandwiched in the width direction W by the area where the adhesive is placed, the stretched state of the discontinuous elastic member 55N is maintained. By cutting the member 55N, the cut discontinuous elastic member 55N contracts. As a result, the discontinuous elastic member 55N having contractibility (that is, in a stretched state) is not arranged in the low contraction region. Therefore, in the low shrinkage region, the discontinuous elastic member 55N does not extend continuously in the width direction W. In this case, the shrinkage force in the width direction W of the low shrinkage region is 0. Note that when the low shrinkage region is provided by the above-described first method, the discontinuous elastic member 55N may have a fixed portion and a non-fixed portion. A fixed part is a part that is arranged in an extended state. An unfixed part is a part that is not fixed in the stretched state and exists in its natural state.

In the second method, the waist elastic member 55 fixed in the low shrinkage region is cut (cut into pieces) at multiple locations to form discontinuous elastic members 55N, thereby reducing the shrinkage force in the width direction W of the low shrinkage region. The contraction force may be lower than the contraction force in the width direction W of the pair of contraction regions. As a result, the discontinuous elastic member 55N does not extend continuously in the width direction W. In this case, even if the discontinuous elastic member 55N is fixed in the stretched state, the contractile force of the discontinuous elastic member 55N is reduced. In addition, since the discontinuous elastic member 55N with remaining shrinkage force is placed (fixed) in the low shrinkage region provided by the second method described above, the low shrinkage region provided by the second method is Since the shrinkage force is greater than 0, it is larger than the shrinkage force of the low shrinkage region provided by the first method.

The low shrinkage region and the pair of shrinkage regions may be defined by measuring the shrinkage force of each region. The "contractile force" of each region may be measured by the following method. When measuring the contraction force in each region, create a test piece to be measured. Both ends of the test piece are clamped by the chuck (clamping tool) of the tensile tester. At this time, the distance between the chucks is 100 mm. Next, with one of the chucks fixed in the width direction W, the other chuck is moved so as to change the distance between the chucks. The moving speed of the chuck at this time is 300 mm/min. While the chuck is moving, the stress applied to the chuck is measured, and the stress (N) obtained when the chuck is 60% (constant width) from the stretched state is defined as the "shrinkage force".

Further, depending on the arrangement of the waist elastic member 55, a low shrinkage region and a pair of shrinkage regions may be defined. Specifically, the boundary in the width direction W between the low shrinkage region and the shrinkage region, that is, the side edge of the low shrinkage region and the inner edge of the shrinkage region, extends from the outer part of the exterior body 50 toward the inner side in the width direction W. It can be defined by the inner edge of the discontinuous elastic member 55N that extends continuously. The side edge of the low shrinkage region and the inner edge of the shrinkage region may be the inner edge of the fixed portion of the discontinuous elastic member 55N when the low shrinkage region is provided in the first method. When a plurality of discontinuous elastic members 55N are arranged at intervals in the front-rear direction L, the side edges of the low contraction regions and the inner edges of the contraction regions are the inner edges of the discontinuous elastic members 55N adjacent in the front-rear direction L. defined by the straight line connecting the The outer edge of the contraction area is the position of the outermost discontinuous elastic member 55N in the front-rear direction L, and the inner edge of the contraction area is the position of the innermost discontinuous elastic member 55N in the front-rear direction L. The outer edge of the low shrinkage area is defined by a virtual line connecting the inner edges of the outermost discontinuous elastic members 55N adjacent to the low shrinkage area on both sides in the width direction W, and the inner edge of the low shrinkage area is , is defined by an imaginary line connecting the inner edges of the innermost discontinuous elastic member 55N adjacent to the low shrinkage region on both sides in the width direction W. Note that when there is one discontinuous elastic member 55N, the outer edge of the contraction area is the outer edge of the discontinuous elastic member 55N, and the inner edge of the contraction area is the position of the outer edge of the discontinuous elastic member 55N. This is the position of the inner edge. The outer edge of the low shrinkage area is defined by a virtual line connecting the inner edge of the outer edge of the discontinuous elastic member 55N adjacent to the low shrinkage area on both sides in the width direction W, and the inner edge of the low shrinkage area is defined by an imaginary line connecting the inner edges of the discontinuous elastic member 55N adjacent to the low shrinkage region on both sides in the width direction W.

The central low shrinkage region LER1 has a minimum width MI and a maximum width MA located outside the minimum width MI in the front-rear direction L. The central low shrinkage region LER1 has a minimum side edge EMI, which is the side edge of the central low shrinkage region LER1 at the position of the minimum width MI, and a maximum side edge EMA, which is the side edge of the central low shrinkage region LER1 at the position of the maximum width MA. , has. As shown in FIG. 4 and the like, the width of the central low shrinkage region LER1 may increase toward the outside in the front-rear direction L. Therefore, the inner edge of the first discontinuous elastic member 55N1 that continuously extends from the outer side of the exterior body 50 toward the inner side in the width direction W is the same as the first discontinuous elastic member 55N1 located on the outer side in the front-rear direction L. It is located on the outer side in the width direction W.

(4) Relationship with the pelvis As a result of intensive studies, the inventor of the present invention focused on the pelvis and discovered that it is possible to achieve both the function of retaining excrement and the comfort of the wearer, and has completed the present invention. Ta. Specifically, as shown in FIGS. 6 and 7, the height of the iliac crest IC, which is the upper edge of the wearer's ilium IB, varies from the center of the wearer's ventral or dorsal side to the side. It gets higher as you go. Therefore, in the waist region, the wearer's fat, internal organs, etc. are less covered by the ilium IB as the wearer moves outward in the front-rear direction L, and the abdomen and back tend to protrude toward the outside of the body. Therefore, as shown in FIG. 8, in the waist region, the circumference CL of the waist on each of the ventral and dorsal sides of the wearer increases as it goes outward in the front-rear direction L, and the waist region of the absorbent article It becomes easier to tighten the body of the person. Furthermore, due to the contraction of the waist elastic member 55, a force directed from the outside in the front-rear direction L, where the circumference CL of the waist region is longer, to the inside in the front-rear direction L, where the circumference CL of the waist region is shorter, tends to act on the front waist region S1. In particular, the portion of the waist area where the circumference CL was long was likely to slip off.

The absorbent article 1 according to the embodiment is provided with a central low shrinkage region LER1 and a pair of side shrinkage regions ER1, and the central low shrinkage region LER1 has a minimum width MI and a maximum width MA. The maximum width MA is located outside the minimum width MI in the front-rear direction L. Thereby, as shown in FIG. 8, the portion of the central low shrinkage region LER1 having the maximum width MA can cover the portion where the circumference CL of the torso is longer than the portion having the minimum width MI. As a result, the part where the circumference CL of the torso is longer (that is, the part where the wearer's body is more likely to be tightened) is covered by the part of the maximum width MA of the central low contraction region LER1, which has a weaker contraction force than the side contraction region ER1. be able to. Therefore, it is possible to enlarge the area where the contraction force is weak and the wearer's body is difficult to tighten (i.e., the central low contraction area LER1), which is a part where the wearer's body is more likely to be tightened, and the wearer's wearing comfort is improved. can. In addition, the contraction force in the width direction W becomes weaker in the portion where the circumference CL of the torso is long, and the force directed from the outside to the inside in the front-rear direction L can be reduced. This makes it difficult for the portion of the torso with a long circumference CL to slip off, thereby improving the wearing comfort of the wearer.

Further, when the width of the waist region is constant, the thinner the absorbent article 1 is, the lower the wearing pressure becomes. Here, since the inner edge IE of the central low shrinkage region LER1 is located outside the outer edge 31F of the absorbent core 31, the central low shrinkage region LER1 does not overlap with the absorbent core 31 in the thickness direction T. Therefore, compared to the case where the central low shrinkage region LER1 overlaps the absorbent core 31 in the thickness direction T, the wearing pressure in the central low shrinkage region LER1 can be lowered. Thereby, the central low shrinkage region LER1 fits the wearer's body with low wearing pressure, so that the wearer's wearing comfort can be improved.

In addition, in the waist region, the height of the iliac crest IC increases from the center of the ventral or dorsal side toward the sides, so the height of the iliac crest IC increases from the center of the ventral or dorsal side to the side of the wearer compared to the center of the ventral or dorsal side. , the area where internal organs, fat, etc. are covered by the ilium IB becomes larger. Therefore, even if the side contraction region ER1 is brought into close contact with the wearer's body, internal organs, fat, etc. are not likely to be compressed. Therefore, by arranging the pair of side shrinkage regions ER1 adjacent to both outer sides of the center low shrinkage region LER1 in the width direction W, the pair of side shrinkage regions ER1 are arranged closer to the sides of the wearer than the center low shrinkage region LER1. It can be made easier. When the pair of side contraction regions ER1 are arranged on the sides of the wearer, the contraction of the pair of side contraction regions ER1 brings the front waist region S1 into close contact with the wearer's body, but the wearer does not feel uncomfortable. Therefore, the wearer's wearing comfort can be improved.

Here, since the excrement is absorbed and held by the absorbent core 31, the area inside the outer edge 31F of the absorbent core 31 in the front-rear direction L becomes a holding area that holds the excrement. In the embodiment, the central low shrinkage region LER1 does not overlap the absorbent core 31 in the thickness direction T. Specifically, the inner edge IE of the central low shrinkage region LER1 is located outside the outer edge 31F of the absorbent core 31 in the front-rear direction L. Thereby, the central low shrinkage region LER1, which has a weaker shrinkage force than the side shrinkage regions ER1, can be provided outside the holding region in the front-rear direction L. As a result, while the excrement is retained in the retention area, the influence on retention of the excrement can be suppressed compared to the case where the central low contraction area LER1 is provided in the retention area. In addition, since the absorbent core 31 expands by absorbing excrement, by providing a central low-contraction region LER1 with a weak contraction force outside the holding region in the front-rear direction L, the wearer feels comfortable even after excretion. becomes easier to maintain. As a result, the wearer's wearing comfort can be improved while maintaining the excrement retaining function, so that the excrement retaining function and the wearer's wearing comfort can be achieved at the same time.

Moreover, the first waist region in which the central low shrinkage region LER1 is provided is located in the front waist region S1, that is, on the ventral side of the wearer. The height of the iliac crest IC on the ventral side is lower than the height of the iliac crest IC on the dorsal side, so viscera and fat are covered by the iliac IB on the ventral side compared to the dorsal side. The area is small. For this reason, the abdomen tends to protrude outward from the body more easily than the back. Therefore, by arranging the central low contraction region LER1 on the wearer's abdomen, it is possible to reduce the area where the wearer's abdomen is strongly tightened and improve the wearing comfort.

In addition, in the front waist region S1, the height of the iliac crest IC increases as it goes from the center to the side. less area covered by For this reason, the wearer's body tends to protrude more outward in the front-rear direction L, and the circumference CL of the wearer's torso becomes longer. In this embodiment, the width of the central low shrinkage region LER1 increases toward the outside in the front-rear direction L. As a result, the width of the central low-contraction region LER1 increases in accordance with the circumference CL of the wearer's torso, and the region that does not strongly tighten the wearer's body increases. As a result, the wearing comfort can be improved.

Further, in the embodiment, the shrinkage force in the width direction W is greater than 0 in the central low shrinkage region LER1. The central low shrinkage region LER1 overlaps the extension portion 24 in the thickness direction T. Thereby, as shown in FIG. 8C, the extending portion 24 is contracted in the width direction W with a weak force, thereby creating a small gap between the extending portion 24 and the wearer's body. As a result, while suppressing the leakage of excrement by reducing the gap, it is possible to improve breathability in the region of the front waist region S1 that overlaps with the extension portion 24 and tends to become stuffy. It is possible to reduce the wearer's discomfort due to stuffiness and improve the wearing comfort.

Further, the region outside the outer end edge 24F of the extension portion 24 in the front-rear direction L has a lower abdomen and back region than the region overlapping with the extension portion 24 in the thickness direction T (hereinafter referred to as the extension region). It protrudes more outward. Therefore, when the central low shrinkage region LER1 overlaps in the thickness direction T with a region outside the outer end edge 24F of the extension portion 24 in the front-rear direction L (hereinafter referred to as the outside region), the thickness of the outside region is Since the thickness of the outer region is thinner than that of the extension region due to the absence of the extension portion 24, the bonding pressure of the outer region is lower than that of the extension region. In addition, since the outer region overlaps in the thickness direction T with the central low shrinkage region LER1, which has a low contractile force, the pressure is lower and stronger on the protruding abdomen and back than in the extension region. A non-tightening outer region can be provided, further improving the wearer's comfort.

Further, the maximum side edge EMA of the central low shrinkage region LER1 may be arranged outside the side edge 31E of the absorbent core 31. As a result, at least some of the side contraction regions ER1 are not arranged inside the side edge 31E of the absorbent core 31 in the width direction W, so that the absorbent core 31 can be made difficult to be pulled inward in the width direction W. As a result, the absorbent core 31 becomes difficult to shrink in the width direction W, so that the absorption area of the absorbent core 31 can be secured, and leakage of excrement can be suppressed.

Further, the maximum side edge EMA of the central low shrinkage region LER1 may be arranged outside the side edge 20E of the absorbent main body 20. As a result, at least some of the side contraction regions ER1 are not arranged inside the side edge 20E of the absorbent main body 20 in the width direction W, so that the absorbent main body 20 is difficult to be pulled inward in the width direction W. can. As a result, the absorbent body 20 becomes difficult to shrink in the width direction W, so the area of the absorbent body 20 can be secured, and leakage of excrement from the absorbent body 20 can be suppressed.

Further, the minimum side edge EMI of the central low shrinkage region LER1 may be arranged inside the side edge 31E of the absorbent core 31. Thereby, the side edge 31E of the absorbent core 31 approaches the wearer's body side due to the contraction of the side contraction region ER1. The gap between the absorbent article 1 and the wearer's body is reduced near the side edge 31E of the absorbent core 31, and leakage of excrement can be suppressed.

The waist elastic member 55 also includes a first continuous elastic member 55C1 that extends continuously from one side end to the other side end of the front waist region S1 on the inside of the central low shrinkage region LER1 in the front-rear direction L. may have. As shown in FIGS. 6 and 7, when the wearer wears the absorbent article 1 such that the first continuous elastic member 55C1 is located near the wearer's ilium IB, the front waist region S1 is can be brought into continuous contact with the Here, since the internal organs, fat, etc. that exist inside the ilium IB are not easily compressed, the wearer is unlikely to feel uncomfortable even if the front waist region S1 is brought into close contact with the wearer's body in the vicinity of the ilium IB. In addition, when the wearer wears the absorbent article 1 such that the first continuous elastic member 55C1 is located near the ilium IB of the wearer, the central low contraction region LER1 is located above the ilium IB. That is, it is arranged in a region where the circumference of the torso is long. Therefore, in contrast to a portion where the circumference of the torso is long and the wearing comfort is likely to deteriorate, a long region that does not strongly tighten the wearer's body can be provided, and the wearing comfort for the wearer can be improved.

Further, the contraction force of the first continuous elastic member 55C1 may be greater than the contraction force of the other waist elastic members 55. Therefore, on the inner side of the central low shrinkage region LER1 and the pair of side contractile regions ER1 in the front-rear direction L, there is a region having a higher contractile force than the central low shrinkage region LER1 and the pair of side contractile regions ER1. Further, on the outer side of the crotch-side low-shrinkage region LER1 and the pair of crotch-side side-shrinkage regions ER2 in the front-rear direction L, there is a region having a higher contractile force than the crotch-side low-shrinkage region LER1 and the pair of crotch-side side shrinkage regions ER2. do. The other waist elastic members 55 may be waist elastic members 55 in the same waistline region as the first continuous elastic member 55C1, or may be waist elastic members 55 in both the front waistline region S1 and the back waistline region S2. . When the wearer wears the absorbent article 1 such that the first continuous elastic member 55C1 is located near the ilium IB of the wearer, internal organs, fat, etc. are not compressed, and the wearer does not feel uncomfortable at the ilium IB. Nearby, the first continuous elastic member 55C1 having a large contractile force can firmly bring the front waist region S1 into close contact with the wearer's body.

Note that the first continuous elastic member 55C1 may be arranged 5% to 20% behind the front edge 16F of the side joint portion 16 in the front waist region S1 with respect to the entire length of the absorbent article 1 in the front-rear direction L. Thereby, the first continuous elastic member 55C1 can be easily positioned near the wearer's iliac bone IB. Further, in the front waist region S1, the first continuous elastic member 55C1 extends from 20% to 90% forward, preferably 40%, of the entire length of the side joint 16 in the front-rear direction L from the rear end edge 16R of the side joint 16. 70% forward, more preferably 45% to 65% forward. Thereby, the first continuous elastic member 55C1 can be easily positioned near the wearer's iliac bone IB.

The contractile force of the waist elastic member 55 can be measured, for example, by the following method. Measure the length H0 of the effective length portion of the waist elastic member 55 in the width direction W with the absorbent article 1 stretched to the maximum in the front-rear direction L to the extent that the wrinkles that had occurred in the absorbent article 1 are no longer visible. do. Next, the waist elastic member 55 is removed from the absorbent article 1, and the length H1 of the effective length portion of the waist elastic member 55 in the width direction W is measured. Then, the contraction force of the waist elastic member 55 can be calculated from "contraction force=H0/H1". Note that instead of the contraction force, the size of the contraction force may be compared based on the count that defines the thickness of the waist elastic member 55.

Further, the crotch side low shrinkage region LER2 may overlap the absorbent core 31 in the thickness direction T. The portion of the absorbent core 31 that overlaps in the thickness direction T with the crotch side low shrinkage region LER2 with low shrinkage force is difficult to shrink in the width direction W. Therefore, the absorption area of the absorbent core 31 can be secured, and leakage of excrement can be suppressed.

Further, the side edge 31E of the absorbent core 31 may overlap the crotch-side side contraction region ER2 in the thickness direction T. Thereby, due to the contraction of the crotch-side side contraction region ER2, a force directed outward in the width direction W acts on the side edge 31E of the absorbent core 31, and the absorbent core 31 is easily pulled outward in the width direction W. As a result, the side edges 31E of the absorbent core 31 are pulled outward in the width direction, and the absorbent core 31 is stretched outward in the width direction W. The absorption area of the absorbent core 31 can be secured, and leakage of excrement can be suppressed.

Further, the inner edge of the crotch-side side contraction region ER2 may be located outside the slit 35. The slit 35 of the absorbent core 31 has lower rigidity than the surrounding area, and therefore is easily crushed in the width direction W. Here, the inner edge of the crotch-side side contraction region ER2 is located on the outer side of the slit 35 of the absorbent core 31 in the width direction W. Therefore, even if the crotch side side contraction region ER2, which has a stronger contraction force than the crotch side low contraction region LER2, contracts in the width direction W, the force that causes the slit 35 to contract in the width direction W does not act on the slit 35. This makes it difficult for the slit 35 to be crushed in the width direction W. When the slits 35 are not crushed in the width direction W, a difference in rigidity occurs in the width direction W due to the slits 35, so that the absorbent core 31 can be easily bent in the width direction W using the slits 35 as a base point. By bending the absorbent core 31 in the width direction W, the absorbent core 31 can be easily stored in the crotch region S3, so that the wearing comfort can be improved.

In addition, the slope (L1/W1) of the length L1 in the front-rear direction with respect to the length W1 in the width direction W from the minimum side edge EMI to the maximum side edge EMA of the central low shrinkage region LER1 is It is smaller than the slope (L2/W2) of the length L2 in the front-rear direction L with respect to the length W2 in the width direction W from the outermost side edge of the central low contraction region LER1 to the minimum side edge EMI in the front-rear direction L. good. In young infants who are short in stature, the change in the circumference CL of the ventral trunk in the anteroposterior direction L is large compared to adults. Therefore, the circumference CL of the ventral trunk starts to increase from a distance closer to the ilium IB on the outer side of the ilium IB in the anteroposterior direction L. Therefore, by reducing the slope from the minimum side edge EMI to the maximum side edge EMA (the slope L1/W1 of the side edge of the central low contraction region LER1), the center The width of the low shrinkage region LER1 can be increased quickly. As a result, it is possible to arrange a region that does not strongly tighten the body in accordance with the circumference CL of the torso of a young infant, so that the wearing comfort of the young infant can be improved.

Note that the maximum side edge EMA, which is likely to be placed above the iliac crest IR, is located outside in the width direction W from the center in the width direction W between the side joint portion 16 and the side edge 20E of the absorbent main body 20. You can. In addition, in consideration of the shape of the iliac bone IB, in order to secure a wide area outside the absorbent main body 20 in the width direction W where the body is not strongly tightened, the first From the inner edge of the first discontinuous elastic member 55N that is the outermost one in the front-rear direction L among the discontinuous elastic members 55N, The length in the width direction W to the inner edge of the first discontinuous elastic member 55N on the inner side in the longitudinal direction L is the length in the width direction W between the inner edges of the first discontinuous elastic members 55N1 adjacent in the longitudinal direction L. It's good to be the biggest of all.

(5) Other embodiments The above-described embodiments and modified examples are for the purpose of illustrative explanation, and the present invention may be implemented in other embodiments. For example, the central low shrinkage region LER1 may be provided in the rear waistline region S2, or the central low shrinkage region LER1 may be provided in both the front waistline region S1 and the rear waistline region S2.

Further, the back low shrinkage region LERR may overlap the absorbent core 31 in the thickness direction T. The width of the back low shrinkage region LERR may be wider than the width of the crotch low shrinkage region LER2. Thereby, the absorbent core 31 on the back side can be made more difficult to shrink in the width direction W than the absorbent core 31 on the ventral side. Thereby, the absorption area of the absorbent core 31 on the back side can be secured widely, and a large space for accommodating stool can be secured. As a result, leakage of excrement can be suppressed.

Further, in the width direction W, the inner edge of the crotch side side contraction region ER2 may be located inner than the side edge of the absorbent main body 20. Furthermore, in the width direction W, the inner edge of the dorsal side contraction region ERR may be located inside the inner edge of the crotch side contraction region ER2. The dorsal side of the absorbent main body 20 hits the arm of a caregiver when being held or hits the floor depending on the sleeping position, so the absorbent main body 20 on the dorsal side is wider in the width direction than the absorbent main body 20 on the ventral side. Easy to slip off. When the inner edge of the dorsal side contraction region ERR is inside the inner edge of the crotch side contraction region ER2, the dorsal side contraction region ERR hangs on the absorbent body when the absorbent body shifts in the width direction. It is possible to make the elastic force of the crotch side contraction region ER2 larger than that of the crotch side contraction region ER2. As a result, the stretching force of the back side contraction region ERR becomes larger in accordance with the deviation of the absorbent main body 20 in the width direction W, so that the back absorbent main body 20 in particular can be made difficult to shift in the width direction W. .

It should be noted that the configurations of the absorbent article 1 according to the above-described embodiment, each modification example, and other embodiments can be combined as appropriate. The invention is not limited to what has been described herein. Modifications and changes may be made without departing from the spirit and scope of the present invention as defined by the claims.

1 : Absorbent article 20 : Absorbent main body 24 : Extension part 31 : Absorbent core 35 : Slit 55 : Waist elastic member 55CF : Front continuous elastic member (continuous elastic member)
EMA: Maximum side edge EMI: Minimum side edge ER1: Side contraction area ER2: Crotch side side contraction area LER1: Central low contraction area LER2: Crotch side low contraction area MA: Maximum width MI: Minimum width

Claims (10)

a front-back direction, a width direction perpendicular to the front-back direction, and a thickness direction;
a waist region formed by a first waist region and a second waist region, and an inseam region sandwiched between the first waist region and the second waist region in the front-rear direction;
an absorbent core including an absorbent material;
a waist elastic member disposed in the first waist region in a stretched state in the width direction;
In the first waist region, a central low shrinkage region straddles the width center that is the center of the absorbent article in the width direction, and a pair of side shrinkage regions adjacent to both outer sides of the central low shrinkage region in the width direction. established,
The widthwise shrinkage force of the central low shrinkage region is lower than the widthwise shrinkage force of the side shrinkage regions,
The central low shrinkage region has a minimum width and a maximum width located outside the minimum width in the front-rear direction,
In the front-rear direction, the inner edge of the central low shrinkage region is located outside the outer edge of the absorbent core,
The waist elastic member has a continuous elastic member that extends continuously from one side end to the other side end of the first waist region on the inside of the central low shrinkage region in the front-rear direction,
In the first girth region, a crotch-side low shrinkage region that straddles the width center on the inside of the continuous elastic member in the front-rear direction, and a crotch-side low-shrinkage region that straddles the width center on the inside of the continuous elastic member in the front-back direction and on the crotch side in the width direction. A pair of crotch side side contraction areas adjacent to both outer sides of the low contraction area are provided,
The contraction force in the width direction of the crotch side low contraction area is lower than the contraction force in the width direction of the crotch side side contraction area,
The absorbent article, wherein the crotch side low shrinkage region overlaps the absorbent core in the thickness direction. The absorbent article according to claim 1, wherein a side edge of the absorbent core overlaps the crotch side contraction region in the thickness direction. The absorbent core has a slit extending in the front-rear direction in the crotch region,
The absorbent article according to claim 1 or 2, wherein in the width direction, an inner edge of the crotch-side side contraction region is located outside the slit. The first waist region is located on the ventral side of the wearer,
The width of the central low shrinkage region increases toward the outside in the front-rear direction,
The front and back with respect to the length in the width direction from the minimum side edge that is the side edge of the central low shrinkage area at the position of the minimum width to the maximum side edge that is the side edge of the central low shrinkage area at the position of the maximum width. The inclination of the length in the front-rear direction is the slope of the length in the front-rear direction relative to the length in the width direction from the outermost side edge of the crotch side low-shrinkage region in the front-back direction to the minimum side edge of the central low-shrinkage region. The absorbent article according to any one of claims 1 to 3, which is smaller than the slope of the length. In the central low shrinkage region, the shrinkage force in the width direction is greater than 0;
an absorbent body having the absorbent core and extending from the crotch region to the first waist region;
The absorbent main body has an extension portion that extends further outward in the front-rear direction than the outer end edge of the absorbent core in the front-rear direction,
The absorbent article according to any one of claims 1 to 4, wherein the central low shrinkage region overlaps the extending portion in the thickness direction. an absorbent body having the absorbent core and extending from the crotch region to the first waist region;
The absorbent main body has an extension portion that extends further outward in the front-rear direction than the outer end edge of the absorbent core in the front-rear direction,
The absorbent article according to any one of claims 1 to 5, wherein the central low shrinkage region overlaps in the thickness direction a region outside the outer end edge of the extension portion in the front-rear direction. The absorbent article according to any one of claims 1 to 6 , wherein the contraction force of the continuous elastic member is larger than the contraction force of other waist elastic members. Any one of claims 1 to 7 , wherein in the width direction, a maximum side edge that is a side edge of the central low shrinkage region at the position of the maximum width is located outside a side edge of the absorbent core. The absorbent article described in . According to any one of claims 1 to 8 , in the width direction, a minimum side edge that is a side edge of the central low shrinkage region at the position of the minimum width is located inside a side edge of the absorbent core. absorbent articles. an absorbent body having the absorbent core and extending from the inseam region to the first waist region;
According to any one of claims 1 to 9 , in the width direction, a maximum side edge that is a side edge of the central low shrinkage region at the position of the maximum width is located outside a side edge of the absorbent main body. Absorbent article as described.

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