JP2021106818A - Absorbent article - Google Patents

Abstract

To provide an absorbent article which can satisfy both a holding function of excretion and a wearing feeling of a wearer.SOLUTION: An absorbent article 1 has an absorbent core 31 and a waist elastic member 55. In a front waist region S1, there are provided a central low contraction region LER1 crossing a width center WC of the absorbent article, and a pair of side contraction regions ER1 adjacent to both outer sides of the central low contraction region LER1 in a width direction W. A contractive force of the central low contraction region LER1 in the width direction W is lower than a contractive force of the side contraction region ER1 in the width direction W. The central low contraction region LER1 has a minimum width MI, and a maximum width MA located outside the minimum width MI in a longitudinal direction L. In the longitudinal direction L, an inner end edge IE of the central low contraction region LER1 is located outside an inner end edge 841I of a longitudinal connection part 842.SELECTED DRAWING: Figure 7

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 extending state in a waist circumference region.

Patent Document 1 has an absorption core containing an absorbent material and a waist elastic member arranged in a state of being extended in the width direction in a waist circumference region, and is provided with a central low contraction region and a pair of side contraction regions. Absorbent articles are disclosed. The central low shrinkage region straddles the widthwise center of the absorbent article. The pair of side contraction regions are adjacent to both outer sides of the central low contraction region in the width direction. Further, the contraction force in the width direction of the central low contraction region is lower than the contraction force in the width direction of the side contraction region. Since the wearer's body protrudes from the buttocks on the dorsal side, by making the maximum width of the central low contraction region on the dorsal side larger than the maximum width of the central low contraction region on the ventral side, the wearer's body can be raised on the dorsal side. It is not tightened strongly and the wearer does not feel uncomfortable.

On the other hand, by relatively increasing the contraction force of the side contraction regions adjacent to both outer sides of the central low contraction region in the width direction, it is possible to suppress the decrease in the fit of the waist circumference region. As a result, the absorbent article is less likely to be displaced from the wearer's body, the excrement does not leak to the outside, and the absorbent article can hold the excrement. In the above-mentioned absorbent article, the wearability of the absorbent article is improved while maintaining the function of holding excrement, which is a function of the absorbent article.

JP-A-2017-537726

In the above-mentioned absorbent article, the wearability of the absorbent article is improved by adjusting the maximum width of the dorsal central low shrinkage region relative to the maximum width of the ventral central low shrinkage region. rice field. Therefore, focusing only on one side (ventral side or dorsal side) of the wearer's body, it has not been possible to achieve both the excrement holding function and the wearer's wearing feeling.

Therefore, it has an absorbent core containing an absorbent material and a waist elastic member arranged in a state of being extended in the width direction in the waist circumference region, and is provided with a central low shrinkage region and a pair of side shrinkage regions. It is an object of the present invention to provide an absorbent article that can achieve both a function of holding excrement and a feeling of wearing by the wearer.

The absorbent article according to one embodiment includes a width direction orthogonal to the front-rear direction, a thickness direction, a waist circumference area composed of a first waistline area and a second waistline area, and the first waistline area. It also has an inseam region sandwiched between the second waist circumference region in the front-rear direction, an absorption core containing an absorbing material, and a waist elastic member arranged in the first waist circumference region in a state of being extended in the width direction. .. A central low shrinkage region straddling the width center, which is the center of the absorbent article in the width direction in the first waist circumference region, and a pair of side shrinkage regions 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 region is lower than the contraction force in the width direction of the side contraction region. The central low shrinkage region has a minimum width and a maximum width located outside the front-rear direction with respect to the minimum width. In the anteroposterior direction, the inner edge of the central low shrinkage region is located outside the inner edge of the anterior-posterior junction.

FIG. 1 is a schematic front view of the absorbent article according to the present embodiment. FIG. 2 is a schematic plan view of the absorbent article according to the present embodiment. FIG. 3A is a schematic cross-sectional view of the absorbent article along the line F3A-F3A in FIG. 2, and FIG. 3B is a schematic cross-sectional view of the absorbent article along the line F3B-F3B in FIG. FIG. 4 is a schematic plan view of an absorbent article for explaining the waist elastic member and leg gathers. FIG. 5 is a schematic plan view of an absorbent article for explaining a low shrinkage region and a leak-proof cuff. FIG. 6A is a schematic cross-sectional view of the absorbent article along the line F6-F6 in FIG. 2, and FIG. 6B is a schematic cross-sectional view of the absorbent article showing a state in which the standing portion stands upright. FIG. 7 is a partially enlarged view of a schematic plan view of the absorbent article according to the present embodiment. FIG. 8 is a front view of the absorbent article for explaining the absorbent article in a worn state. FIG. 9 is a side view of the absorbent article for explaining the absorbent article in a worn state. 10A is a schematic cross-sectional view taken along the line F8A-F8A in FIG. 6, FIG. 10B is a schematic cross-sectional view taken along the line F8B-F8B in FIG. It is a figure. FIG. 11 is a schematic view along the front-rear direction L for explaining the bending of the absorption core.

(1) Outline of Embodiment The absorbent article according to one embodiment has a waist circumference region composed of a front-rear direction, a width direction orthogonal to the front-rear direction, a thickness direction, a first waist circumference region, and a second waist circumference region. The inseam region sandwiched between the first waist circumference region and the second waist circumference region in the front-rear direction, the absorption core containing the absorbing material, and the first waist circumference region extending in the width direction are arranged. It has a waist elastic member. A central low shrinkage region straddling the width center, which is the center of the absorbent article in the width direction in the first waist circumference region, and a pair of side shrinkage regions 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 region is lower than the contraction force in the width direction of the side contraction region. The central low shrinkage region has a minimum width and a maximum width located outside the front-rear direction with respect to the minimum width. In the anteroposterior direction, the inner edge of the central low shrinkage region is located outside the inner edge of the anterior-posterior junction. According to this aspect, it is possible to improve the wearing feeling of the wearer while maintaining the function of holding excrement.

According to a preferred embodiment, the first girth region is located on the ventral side of the wearer. Since the height of the ventral iliac crest is lower than the height of the dorsal iliac crest, the area covered by the iliac bones such as internal organs and fat is smaller on the ventral side than on the dorsal side. .. For this reason, the abdomen is more likely to protrude to the outside of the body than the back. Therefore, by arranging the central low contraction region in the abdomen of the wearer, it is possible to reduce the region where the abdomen of the wearer is strongly tightened and improve the wearing feeling.

According to a preferred embodiment, the width of the central low shrinkage region widens toward the outside in the anteroposterior direction. As a result, the width of the central low contraction region becomes wider according to the circumference of the wearer's waist, and the region where the wearer's body is not strongly tightened increases. As a result, the wearing feeling can be improved.

According to a preferred embodiment, the anterior-posterior junction overlaps the side contraction region in the thickness direction. Since the front-rear joint is brought into close contact with the wearer's body due to the contraction of the side contraction region, a gap is less likely to occur between the wearer's body and the front-rear joint. Therefore, leakage of excrement through this gap can be suppressed.

According to a preferred embodiment, the first waist circumference region is arranged on the ventral side of the wearer, the width of the central low contraction region increases toward the outside in the anteroposterior direction, and the central low contraction region is In a wide region extending from the inside of the front-rear joint in the width direction to the outside of the front-rear joint in the width direction, and in a region inside the front-rear joint in the front-rear direction. It has a narrow region, and the length of the wide region in the anteroposterior direction is longer than the length of the narrow region in the anteroposterior direction.
Since the leak-proof cuff extends in the anterior-posterior direction in the inseam area, the anterior-posterior joint is arranged according to the width of the wearer's crotch. Here, since 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, the central low is arranged in the region outside the width direction from the position corresponding to the crotch width of the wearer. The proportion of the area of the contraction region can be increased. As a result, the wearer's body is not strongly tightened in a wide area in the outer region in the width direction from the position corresponding to the wearer's crotch width, and the wearing feeling can be improved.

According to a preferred embodiment, the first girth region is located ventral to the wearer, and the absorption core has a waist low basis weight portion in the first girth region that has a lower basis weight than the periphery. The waist low basis weight portion has a rear end edge in the first waist circumference region, and in the front-rear direction, the inner end edge of the front-rear joint portion is outside the rear end edge of the waist low basis weight portion. Located in. On the ventral side of the wearer, the inner portion of the absorption core tends to bend in the anteroposterior direction toward the non-skin surface side (the direction away from the wearer's body) due to the sitting posture and forward bending. Here, since the difference in rigidity is large before and after the rear end edge of the waist low basis weight portion, the rear end edge of the waist low basis weight portion tends to be the bending base point of the absorption core. In the front-rear direction, the inner edge of the front-rear joint is located outside the edge of the waist low basis weight portion, so that the inner edge of the front-rear joint is outside the bending base point of the absorption core in the front-rear direction. It becomes easier to position. As a result, the upright portion can stand up from the bending base point of the absorption core. Therefore, a gap is unlikely to occur between the standing base point of the standing portion and the bending base point of the absorption core, and it is possible to suppress the leakage of excrement from this gap. In addition, as the inner portion of the absorbent core separates from the wearer's body, the inner portion of the absorbent core also separates from the apex of the upright portion that is closer to the wearer's body than the absorbent core. As a result, the height of the standing portion can be secured, and the leakage of excrement can be suppressed.

According to a preferred embodiment, the waist elastic member is continuously extending from one side end portion of the first waist circumference region to the other side end portion in the front-rear direction inside the central low contraction region. It has an elastic member. When the wearer wears the absorbent article so that the continuous elastic member is located near the wearer's ilium, the first waist circumference region can be continuously brought into close contact with each other in the width direction. Here, since the internal organs, fat, and the like existing inside the ilium are less likely to be compressed, the wearer is less likely to feel uncomfortable in the vicinity of the ilium even if the first waistline region is brought into close contact with the wearer's body. In addition, 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 the region above the ilium, that is, the circumference of the waistline. Is placed in the area where is long. Therefore, it is possible to arrange a long region where the wearer's body is not strongly tightened with respect to a portion where the circumference of the waist is long and the wearing feeling tends to deteriorate, and the wearing feeling of the wearer can be improved.

According to a preferred embodiment, the contraction force of the continuous elastic member is larger than the contraction force of the other waist elastic member. When the wearer wears the absorbent article so that the continuous elastic member is located near the wearer's ilium, the internal organs and fats existing inside the ilium are less likely to be compressed. Therefore, the first waist circumference region can be firmly brought into close contact with the wearer's body by the continuous elastic member having a large contraction force in the vicinity of the ilium where the internal organs and fat are not pressed and the wearer does not feel uncomfortable.

According to a preferred embodiment, the absorption core has a waist low basis weight portion having a basis weight lower than the periphery in the first waist circumference region, and the continuous elastic member has the waist low basis weight portion and the thickness. It overlaps in the vertical direction. In the waist low basis weight portion having a low basis weight and low rigidity, the contraction of the continuous elastic member is unlikely to be hindered, so that the first waist circumference region can be firmly brought into close contact with the wearer's body. In addition, since the waist low basis weight portion has a low basis weight, it does not easily swell even if it absorbs excrement. Therefore, even after excretion, the contraction of the continuous elastic member is unlikely to be hindered, so that the first waist circumference region can be firmly brought into close contact with the wearer's body.

According to a preferred embodiment, the central low shrinkage region overlaps the outer edge of the absorption core in the anterior-posterior direction in the thickness direction. Since the outer edge of the absorption core has lower rigidity than the inner portion in the front-rear direction (hereinafter, the inner core portion) of the outer edge of the absorption core, it easily shrinks in the width direction. When the outer edge of the absorption core shrinks in the width direction, the larger the shrinkage difference between the outer edge of the absorption core and the inner core part, the more the inner core part releases the force applied in the width direction. Is easier to separate from the wearer's body. Therefore, since the central low shrinkage region having a low shrinkage force overlaps with the outer edge of the absorption core in the thickness direction, the outer end portion of the absorption core including the outer edge of the absorption core can be made difficult to shrink in the width direction. .. As a result, the absorption core becomes difficult to separate from the body, the excrement can easily reach the absorption core, and the leakage of the excrement can be further suppressed.

According to a preferred embodiment, the absorbent body has the absorbent core and has an absorbent body extending from the inseam region to the first waistline region, wherein the absorbent body is the absorbent core of the absorbent core. It has an extension portion extending outward from the outer edge in the front-rear direction, and the central low shrinkage region overlaps the extension portion in the thickness direction. Since the abdomen and back tend to protrude toward the outside of the body toward the outside in the anterior-posterior direction, the region that overlaps the extension portion in the thickness direction (hereinafter, the extension region) is the region that overlaps the absorption core in the thickness direction. The abdomen and back protrude more toward the outside of the body than (hereinafter referred to as the core area). Here, the thickness of the extension region is thinner than the thickness of the core region because there is no absorbing core. When the width of the waist circumference area is constant, the thinner the thickness, the lower the pressure applied, so that the pressure applied in the extension region is lower than the pressure applied in the core region. By overlapping the central low contraction region with low contraction force in the thickness direction, the extension portion provides an extension region with low pressure and does not tighten strongly with respect to the portion where the abdomen and back protrude from the core region. It can be arranged and the wearing feeling of the wearer can be improved.

According to a preferred embodiment, the central low shrinkage region overlaps the outer region in the anteroposterior direction with respect to the outer edge of the extension portion in the thickness direction. The region outside the anterior-posterior direction (hereinafter referred to as the outer region) from the outer edge of the extension portion has the abdomen and the back protruding more toward the outside of the body than the extension region. Since the thickness of the outer region is thinner than the thickness of the extension region because there is no extension portion, the pressure applied to the outer region is lower than the pressure applied to the extension region. In addition, since the outer region overlaps the central low contraction region with low contraction force in the thickness direction, the pressure applied to the abdomen and back protruding from the extension region is low and the pressure is not strongly tightened. The outer region can be arranged, and the wearing feeling of the wearer can be further improved.

(2) Overall Schematic Configuration of Absorbent Articles The absorbent articles 1 according to the embodiment will be described with reference to FIGS. 1 to 11. The absorbent article 1 is, for example, a pants-type disposable diaper, a tape-type disposable diaper, a shorts-type sanitary napkin, or the like. The absorbent article 1 of the embodiment is a pants-type disposable diaper. In FIG. 11, "BL" indicates the line of the wearer's body. 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, for convenience of explanation, the members may be separated in the thickness direction T, but in an actual product, they are in contact with the thickness direction T.

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 anterior-posterior direction L is defined by the direction extending to the anterior side and the posterior side of the body. In other words, the anteroposterior direction L is a direction extending anterior-posteriorly in the deployed absorbent article 1. Further, the absorbent article 1 has both the front-rear direction L and the width direction W orthogonal to each other in the thickness direction T. The thickness direction T extends to the skin surface side T1 facing 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 girth region composed of a first girth region and a second girth region, and an inseam region S3 sandwiched between the first girth region and the second girth region in the front-rear direction. In the present embodiment, the first waist circumference area is the front waist circumference area S1 arranged on the ventral side of the wearer. The front waist circumference area S1 is a region facing the front waist circumference (abdomen) of the wearer. The second waist circumference area is the rear waist circumference area S2 arranged on the back side of the wearer. The rear waist circumference area S2 is an area facing the rear waist circumference (back) of the wearer. The inseam area S3 is an area located in the inseam of the wearer and arranged between the front waist area S1 and the rear waist area S2.

The absorbent article 1 may have an absorbent body 20 and an exterior body 50. The absorbent body 20 may be configured as a separate body from the exterior body 50. The absorbent body 20 is arranged at least in the inseam area S3. The absorbent main body 20 may extend from the inseam area S3 to the front waist circumference area S1 in the front-rear direction L, and may extend from the inseam area S3 to the rear waist circumference area S2 in the front-rear direction L. The absorbent body 20 may have an extending portion 24 extending outward in the front-rear direction L from the outer edge of the absorption 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 circumference area S1 and the rear waist circumference region S2. The exterior body 50 is arranged at least in the waist circumference area. The exterior body 50 may be composed of a front exterior body 50A arranged in the front waist circumference area S1 and a rear exterior body 50B arranged in the rear waist circumference area S2.

As shown in FIG. 1, the absorbent article 1 is a side joint that joins the outer portion of the front exterior body 50A arranged in the front waist circumference region S1 in the width direction W and the outer portion of the rear exterior body 50B in the width direction W. It may have a part 16. The side joint portion 16 is defined by a portion in which the outer portion of the front exterior body 50A and the outer portion 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 circumference openings 18 into which the wearer's legs are inserted. Is formed. The waist opening 17 may be defined by the front end edge S1F of the front waist circumference area S1 and the rear end edge S2R of the rear waist circumference area S2.

In the pants-type absorbent article 1, the inseam region S3 may be defined by the inner edge of the side joint 16 in the front-rear direction L. The boundary between the front waist circumference region S1 and the inseam region S3 may be defined by the rear end edge 16R of the side joint portion 16 in the front waist circumference region S1. The boundary between the rear waist circumference region S2 and the inseam region S3 may be defined by the front end edge 16F of the side joint portion 16 in the rear waist circumference region S2. The inseam area S3 may be defined by the area provided with the leg circumference opening 18. The leg circumference 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 inseam area S3 may be defined by the front edge of the leg opening 18. The boundary between the rear waist area S2 and the inseam area S3 may be defined by the rear edge of the leg opening 18.

The outer portion in the present 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 an outer edge in the width direction W. The inner portion in the present specification is a portion that occupies a certain range in the width direction W including the inner edge in the width direction W, and the inner edge is an inner edge in the width direction W. Further, the front end portion and the rear end portion in the present specification are portions that occupy a certain range in the front-rear direction L including the edge in the front-rear direction L, and the front end edge and the rear end edge are edges in the front-rear direction L. The outer edge includes a front edge and a trailing edge, and the outer edge includes a front edge and a trailing edge.

The absorbent body 20 may have an absorber 30, a front surface sheet 41, a back surface sheet 42, and a side sheet 47. The absorber 30 has at least an absorption core 31 containing an absorbing material. The absorbent core 31 (absorbent material) may be composed of, for example, at least one of pulp and a highly absorbent polymer. The absorber 30 may have a core wrap 32 that covers the absorption core 31. The core wrap 32 abuts on the absorption core 31 and covers at least one of the absorption cores 31 in the thickness direction T. The core wrap 32 may sandwich the absorption core 31 in the thickness direction T. The core wrap 32 may wrap the absorption core 31 by folding back on the side of the absorption core 31. The core wrap 32 may be made of, for example, a tissue, a non-woven fabric, or the like.

The absorption core 31 may have a waist low basis weight portion 31L having a basis weight lower than that of the surroundings in the front waist circumference region S1. The waist low basis weight portion 31L may have a trailing edge 31LR in the front waist circumference region S1. The basis weight of the absorbent material of the waist low basis weight portion 31L is the portion of the absorption core 31 having a basis weight higher than that of the waist low basis weight portion 31L (that is, behind the trailing edge 31LR of the waist low basis weight portion 31L). It is lower than the basis weight of the absorption material of the absorption core 31). In the embodiment, the basis weight of the absorbent material of the waist low basis weight portion 31L is 0. In this case, the basis weight of the absorbent material of the waist low basis weight portion 31L may be substantially 0, and the absorption material of the absorption core 31 around the waist low basis weight portion 31L becomes the waist low basis weight portion 31L. It may be spilled. The basis weight of the absorbent material of the waist low basis weight portion 31L may be higher than 0. Further, the absorption core 31 may have a slit 35 extending in the front-rear direction L in the inseam region S3. A pair of slits 35 may be arranged outside the width direction W, which is the center of the width direction W of the absorption core 31.

The surface sheet 41 is located on the skin surface side T1 of the absorber 30. The surface sheet 41 faces the wearer's skin. The surface sheet 41 may have liquid permeability, and may be made of, for example, a non-woven fabric. The back sheet 42 is located on the non-skin surface side T2 of the absorber 30. The back sheet 42 may have liquid impermeable property, and may be made of, for example, a film.

The side sheet 47 is arranged outside the width direction W, which is the center of the width direction W of the absorption core 31. The side seat 47 faces the wearer's skin. The side sheet 47 may extend in the width direction W so as to straddle the center of the absorbent article 1 in the width direction W on the non-skin surface side T2 of the absorption core 31. The side sheet 47 may be arranged on the non-skin surface side T2 of the back surface sheet 42 in a region overlapping the absorber 30 in the thickness direction T. The side sheet 47 may be made of, for example, a non-woven fabric. The side sheet 47 may have a plurality of folds (first fold FL1, second fold FL2, third fold FL3) along the front-rear direction L. The side sheet 47 has a first portion 471 extending outward in the width direction W from the center of the absorbent body 20 in the width direction W to the first fold FL1 on the non-skin surface side T2 of the absorber 30 in the width direction W. May have. The side sheet 47 may form the side edge of the absorbent body 20. The side seat 47 may have a second portion 472 extending inward in the width direction W from the first fold FL1 to the second fold FL2. Further, the side seat 47 may have a third portion 473 extending outward in the width direction W from the second fold FL2 to the third fold FL3. Further, the side seat 47 may have a fourth portion 474 extending inward in the width direction W from the third fold FL3. From the non-skin surface side T2 to the skin surface side T1, the first portion 471, the fourth portion 474, the third portion 473, and the second portion 472 may be arranged in this order.

The exterior body 50 (front exterior body 50A and rear exterior body 50B) is arranged on the non-skin surface side T2 of the absorbent body 20. The exterior body 50 may be composed of a plurality of seat members. The exterior body 50 may have a sheet member arranged on the skin surface side T1 of the absorbent body 20. Further, the exterior body 50 has a waist elastic member 55.

The front exterior body 50A may have a first front seat 51F and a second front seat 52F arranged on the skin surface side T1 of the first front seat 51F. The first front seat 51F may be arranged on the non-skin surface side T2 of the waist elastic member 55. The second front seat 52F may be arranged on the skin surface side T1 of 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 surface side T1. The second front sheet 52F may be arranged on the non-skin side T2 rather than the portion of the first front sheet 51F folded back on the skin side T1. The first front sheet 51F and the second front sheet 52F may be made of, for example, a non-woven fabric.

The rear exterior body 50B may be separated from the front exterior body 50A in the front-rear direction L. The rear exterior body 50B may have a first rear seat 51R and a second rear seat 52R arranged on the skin surface side T1 of the first rear seat 51R. The first rear seat 51R may be arranged on the non-skin surface side T2 of the waist elastic member 55. The second rear seat 52R may be arranged on the skin surface side T1 of the waist elastic member 55. The first rear sheet 51R and the second rear sheet 52R may be composed of, for example, a non-woven fabric.

The waist elastic member 55 is arranged in a state of being extended in the width direction W in the waist circumference region (front waist circumference region S1 or rear waist circumference region S2). 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 in the width direction W from one outer portion of the waist circumference region (front waist circumference region S1 or rear waist circumference region S2) to the other outer portion. The discontinuous elastic member 55N does not extend continuously in the width direction W at least in the center of the width direction W in the waist circumference region. The center of the girth region in the width direction W is at least a region from one outer edge of the absorption core 31 to the other outer edge. The continuous elastic member 55C may have a front continuous elastic member 55CF arranged in the front waist circumference region S1 and a rear continuous elastic member 55CR arranged in the rear waist circumference region S2. The discontinuous elastic member 55N may have a front discontinuous elastic member 55NF arranged in the front waist circumference region S1 and a rear discontinuous elastic member 55NR arranged in the rear waist circumference region S2.

The waist elastic member 55 may be composed of a linear elastic member 55L which is a thread-like or string-like elastic member extending in the width direction W, and may be composed of an elastic sheet 55S which 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 telescopic 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 the linear elastic member 55L and the telescopic sheet 55S, and the discontinuous elastic member 55N is composed of the linear elastic member 55L. The telescopic sheet 55S constitutes the continuous elastic member 55C. The telescopic sheet 55S may be arranged between the first front sheet 51F and the second front sheet 52F in the thickness direction T. The elastic sheet 55S may be arranged on the skin surface side T1 of the linear elastic member 55L.

The front continuous elastic member 55CF composed of the linear elastic member 55L may have a first continuous elastic member 55C1 and a second continuous elastic member 55C2. The first continuous elastic member 55C1 continuously extends from one side end portion of the front waist circumference region S1 to the other side end portion in the front-rear direction L inside the central low-shrinkage region LER1 described later. The second continuous elastic member 55C2 continuously extends from one side end portion of the front waist circumference region S1 to the other side end portion in the front-rear direction L outside the central low contraction region LER1. The first continuous elastic member 55C1 is the overall 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 from the front end edge 16F of the side joint portion 16 in the front waist circumference region S1. It may be placed% to 20% behind. Further, in the front waist circumference region S1, the first continuous elastic member 55C1 is 20% to 90% forward, preferably 40%, from the rear end edge 16R of the side joint portion 16 with respect to the total length of the side joint portion 16 in the front-rear direction L. It may be located 70% forward, more preferably 45% to 65% forward.

The front discontinuous elastic member 55NF composed of the linear elastic member 55L may have 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 a part of the plurality of linear elastic members 55L (first discontinuous elastic member 55N1) in the width direction W, that is, continuously from the outer side of the front waist circumference region S1 toward the inside of the width direction W. The length to extend is different. The second non-continuous 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 extend linearly inward in the width direction W from the side joint portion 16 to the inner edge of the side contraction region ER1 described later. Similarly, the second discontinuous elastic member 55N2 may extend linearly inward in the width direction W from the side joint 16 to the inner edge of the crotch side contraction region ER2 described later.

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

The absorbent article 1 may have leg gathers 70. The leg gather 70 is a gather provided outside the absorption core 31 in the width direction W. The leg gathers 70 may be provided around the leg opening 18 and the leg opening 18. Further, it may be provided on the non-skin surface side T2 of the leak-proof cuff 80.

The leg gather 70 is pulled up toward the wearer's body by the contraction of the leg elastic member 75. The leg gather 70 has a leg elastic member 75. The leg elastic member 75 is arranged in a state of being extended in the front-rear direction L outside the absorption core 31 in the width direction W at least in the inseam region S3. The leg elastic member 75 extends in the front-rear direction L at least in the inseam region S3. The leg elastic member 75 may extend to the front girth region S1 and may extend to the rear girth region S2. The leg elastic member 75 may be arranged on the side seat 47. The leg elastic member 75 may be arranged between the side sheet 47 and the back surface sheet 42 in the thickness direction T. Further, the leg elastic member 75 may be arranged so as to be sandwiched between the side seats 47 in the thickness direction T. Of the plurality of leg elastic members 75, some leg elastic members 75 (for example, the leg elastic members 75 arranged on the outermost side in the width direction W) are arranged so as to be sandwiched between the side sheets 47 in the thickness direction T. May be done. The leg elastic member 75 may be fixed to the side sheet 47 or the back surface sheet 42. Therefore, the leg gather 70 may be composed of a side seat 47 in addition to the leg elastic member 75. The leg gather 70 may be composed of a leg elastic member 75, a side sheet 47, and a back surface sheet 42. The leg elastic member 75 is arranged on other sheet members (sheet members other than the back surface sheet 42 and the side sheet 47) arranged outside the absorption core 31 in the width direction W in the thickness direction T. You may be.

The absorbent article 1 has a pair of leak-proof cuffs 80. The pair of leakage-proof cuffs 80 extend in the front-rear direction L at least in the inseam region, and are arranged on both sides of the width center WC. The pair of leakage-proof cuffs 80 have an upright portion 82 that can stand up toward the skin surface side T1 due to contraction in the front-rear direction L, and a joint portion 84 that is joined so as not to stand up toward the skin surface side T1.

The upright portion 82 can be upright by contraction of the leg side elastic member 85. The leg side elastic member 85 is arranged on the side seat 47 in a state of being extended in the front-rear direction L. The leg side elastic member 85 may be sandwiched between the side seats 47. It may be arranged between the second portion 472 and the third portion 473 of the side seat 47. The leg side elastic member 85 may be fixed to at least one of the second portion 472 and the third portion 473 of the side seat 47. The leg side elastic member 85 may be composed of a single elastic member, or may be composed of a plurality of elastic members arranged at intervals in the width direction W. In this embodiment, it is composed of two elastic members. The leg side elastic member 85 may be composed of a thread-like or string-like elastic member extending in the front-rear direction L.

The joint portion 84 has a front-rear joint portion 841 and a width joint portion 842. The front-rear joint portion 841 is located outside the upright portion 82 in the front-rear direction L, and is joined so as not to stand toward the skin surface side T1. The front-rear joint 841 has an inner edge 841I which is an inner edge in the front-rear direction L. Further, the front-rear joint portion 841 has an inner edge EI which is an inner side edge in the width direction W. The width joining portion 842 is located outside the standing portion 82 in the width direction W, and is joined so as not to stand toward the skin surface side T1. The width junction 842 has an inner edge 842EI, which is an inner side edge in the width direction W. The upright portion 82 can stand up with the inner edge 841I of the front-rear joint portion 841 as the base point in the front-rear direction L, and can stand up with the inner edge 842EI of the width joint portion 842 as the base point in the width direction W.

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

The central low shrinkage region LER1 is a region straddling the width center WC, which is the center of the absorbent article 1 in the width direction W in the front waist circumference region S1. The pair of side contraction regions ER1 are regions adjacent to both outer sides of the central low contraction 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 beyond the side joint portion 16 to the outside in the width direction W. The contraction force of the central low contraction region LER1 in the width direction W is lower than the contraction force of the side contraction region ER1 in the width direction W. Similarly, the crotch-side low contraction region LER2 straddles the width center WC in the front waist circumference region S1. The pair of crotch 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 contraction regions ER2 may extend linearly in the width direction from the inner edge of the crotch side contraction region 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 of the crotch side low contraction region LER2 in the width direction W is lower than the contraction force of the crotch side contraction region ER2 in the width direction W. The central low-shrinkage region LER1 may be located outside 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 circumference 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 contraction region ERRs may extend linearly in the width direction from the inner edge of the dorsal side contraction region ERR to the side joint portion 16 and may extend beyond the side joint portion 16 to the outside 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 region may be made lower than the contraction force in the width direction W of the pair of contraction regions by not arranging the discontinuous elastic member 55N in the extended state. For example, an adhesive for fixing the discontinuous elastic member 55N (for example, a hot melt type adhesive (HMA)) is arranged in a region where the discontinuous elastic member 55N is arranged in an elongated state, and the discontinuous elastic member 55N is arranged in a low shrinkage region. Does not place an adhesive for fixing the discontinuous elastic member 55N. As a result, the discontinuous elastic member 55N is fixed in the stretched state in the region where the adhesive is arranged. In the region where the adhesive is not arranged and sandwiched between the regions where the adhesive is arranged in the width direction W, the discontinuous elastic member 55N is maintained in the stretched state, so that the discontinuous elasticity is maintained in the region. By cutting the member 55N, the cut discontinuous elastic member 55N contracts. As a result, the non-continuous elastic member 55N having shrinkage (that is, in the extended state) is not arranged in the low shrinkage region. Therefore, in the low shrinkage region, the discontinuous elastic member 55N does not continuously extend in the width direction W. In this case, the contraction force in the width direction W of the low contraction region is 0. When the low shrinkage region is provided by the above-mentioned first method, the discontinuous elastic member 55N may have a fixed portion and a non-fixed portion. The fixed portion is a portion arranged in an extended state. The non-fixed portion is a portion that exists in the natural state without being fixed in the extended state.

In the second method, the waist elastic member 55 fixed to the low shrinkage region is cut (cut into pieces) at a plurality of points to form the discontinuous elastic member 55N, whereby the waist elastic member 55 is contracted in the width direction W of the low shrinkage region. The 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 continuously extend in the width direction W. In this case, even if the discontinuous elastic member 55N is fixed in the extended state, the contraction force of the discontinuous elastic member 55N is reduced. Since the discontinuous elastic member 55N in which the contraction force remains is arranged (fixed) in the low shrinkage region provided by the second method described above, the low shrinkage region provided by the second method is provided. Since the contraction force of is larger than 0, it is larger than the contraction force of the low contraction region provided by the first method.

The low contraction region and the pair of contraction regions may be defined by measuring the contraction force of each region. The "shrinkage force" of each region may be measured by the following method. When measuring the contractile force of each region, prepare a test piece to be measured. Both ends of the test piece are sandwiched by the chucks (holding tools) of the tensile tester. At this time, the distance between the chucks is set to 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. The stress applied to the chuck during the movement of the chuck is measured, and the stress (N) obtained in a state of 60% (constant width) from the extended state is defined as "contraction force".

Further, the arrangement of the waist elastic member 55 may define a low shrinkage region and a pair of shrinkage regions. Specifically, the boundary of the low contraction region and the contraction region in the width direction W, that is, the side edge of the low contraction region and the inner edge of the contraction region are directed from the outer portion of the exterior body 50 toward the inside of the width direction W. It can be defined by the inner edge of the continuously extending discontinuous elastic member 55N. 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 by the first method. When a plurality of discontinuous elastic members 55N are arranged at intervals in the front-rear direction L, the side edge of the low contraction region and the inner edge of the contraction region are the inner edge of the discontinuous elastic member 55N adjacent to the front-rear direction L. It is defined by a straight line connecting. The outer edge of the contraction region is the position of the outermost discontinuous elastic member 55N in the front-rear direction L, and the inner edge of the contraction 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 a virtual line connecting the inner edges of the outermost discontinuous elastic member 55N adjacent to the low shrinkage region on both sides in the width direction W, and the inner edge of the low shrinkage region is defined as , Defined by a virtual 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. When there is only one discontinuous elastic member 55N, the outer edge of the contraction region is the position of the outer edge of the discontinuous elastic member 55N, and the inner edge of the contraction region is the position of the discontinuous elastic member 55N. The position of the inner edge. The outer edge of the low shrinkage region is defined by a virtual line connecting the inner edges of the outer edge of the discontinuous elastic member 55N adjacent to the low shrinkage region on both sides in the width direction W, and is defined by the inner edge of the low shrinkage region. Is regulated by a virtual line connecting the inner edges of the inner edge of the discontinuous elastic member 55N adjacent to the low shrinkage region on both sides in the width direction W.

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

(4) Relationship with the pelvis As a result of diligent studies, the present inventor has focused on the pelvis and found that both the function of retaining excrement and the wearing feeling of the wearer are compatible, and completed the present invention. rice field. Specifically, as shown in FIGS. 8 and 9, the height of the iliac crest IC, which is the upper end edge of the wearer's iliac IB, is from the central portion to the lateral side of the wearer's ventral or dorsal side. It is getting higher as you go. Therefore, in the waist circumference region, the more outward in the anterior-posterior direction L, the less the wearer's fat, internal organs, etc. are covered by the iliac IB, and the abdomen and back tend to protrude toward the outside of the body. Therefore, as shown in FIG. 10, in the waist circumference area, the circumference CL of the waist circumference on each of the ventral side and the dorsal side of the wearer becomes longer toward the outside of the front-rear direction L, and the waist circumference area of the absorbent article 1 is worn. It becomes easier to tighten the person's body. Further, due to the contraction of the waist elastic member 55, a force from the outside of the front-rear direction L, which has a longer waist circumference CL, to the inside of the front-rear direction L, which has a shorter waist circumference CL, easily acts on the front waist circumference S1. In particular, the part with a long circumference CL in the waistline area was easy to slip off.

In the absorbent article 1 according to 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 a minimum width MI and a maximum width MA. The maximum width MA is located outside the front-rear direction L with respect to the minimum width MI. As a result, as shown in FIG. 8, the portion of the central low contraction region LER1 having the maximum width MA can cover the portion having a circumference CL longer than the portion having the minimum width MI. As a result, the portion having a longer circumference CL around the waist (that is, the portion where the wearer's body is more easily tightened) is covered with the portion of the maximum width MA of the central low contraction region LER1 whose contraction force is weaker than that of the side contraction region ER1. be able to. Therefore, in the portion where the wearer's body is more easily tightened, the region where the wearer's body is difficult to be tightened due to the weak contraction force (that is, the central low contraction region LER1) can be increased, and the wearer's wearing feeling is improved. can. In addition, in the portion where the circumference CL is long, the contraction force in the width direction W becomes weak, and the force from the outside to the inside in the front-rear direction L can be reduced. As a result, the portion having a long circumference CL around the waist is less likely to slip off, and the wearing feeling of the wearer can be improved.

In addition, since the height of the iliac crest IC in the waist circumference area increases from the central part on the ventral side or the dorsal side toward the side, the side part of the wearer is compared with the central part on the ventral side or the dorsal side. The area where the internal organs, fat, etc. are covered with the iliac IB becomes large. Therefore, even if the side contraction region ER1 is brought into close contact with the wearer's body, the internal organs, fat, and the like are unlikely to be compressed. Since the pair of side contraction regions ER1 are adjacent to both outer sides of the central low contraction region LER1 in the width direction W, the pair of side contraction regions ER1 are more likely to be arranged on the side of the wearer than the central low contraction region LER1. be able to. When the pair of side contraction regions ER1 are arranged on the side portion of the wearer, the wearer does not feel uncomfortable while the front waist circumference region S1 is brought into close contact with the wearer's body by the contraction of the pair of side contraction regions ER1. Therefore, the wearing feeling of the wearer can be improved.

In addition, the absorbent article 1 has a leak-proof cuff 80. When the standing portion 82 of the leak-proof cuff 80 stands up on the skin surface side T1, the excrement is blocked and the lateral leakage of the excrement is prevented. In the front-rear direction L, since the standing portion 82 starts to stand on the skin surface side T1 with the inner end edge 841I of the front-rear joint portion 841 of the leak-proof cuff 80 as a base point, it is front and rear of the inner end edge 841I of the front-rear joint portion 841. The area inside the direction L is the holding area for holding excrement. Here, in the absorbent article 1, the inner end edge IE of the central low shrinkage region LER1 is located outside the inner end edge 841I of the front-rear joint portion 841 in the front-rear direction L. As a result, the contraction force is larger than that of the side contraction region ER1 at a position far from the excrement opening of the excrement that generally exists inside the anterior-posterior direction L (that is, the inseam side) with respect to the holding region. A weak central low shrinkage region LER1 can be provided. In this case, while holding the excrement in the holding region, it is possible to suppress the influence on the holding of the excrement as compared with the case where the central low contraction region LER1 is provided in the holding region. As a result, it is possible to improve the wearing feeling of the wearer while maintaining the holding function of the excrement, and it is possible to achieve both the holding function of the excrement and the wearing feeling of the wearer.

Further, when the side contraction region ER1 contracts inside the inner edge 841EI of the front-rear joint portion 841 in the width direction W, the front-rear joint portion 841 is easily pulled inward in the width direction W. When the front-rear joint portion 841 is displaced inward in the width direction W, the standing base point of the standing portion 82 is displaced inward in the width direction W, and the area of the holding region for holding excrement is reduced. Here, in the absorbent article 1, the maximum side edge EMA of the central low shrinkage region LER1 is located outside the inner edge 841EI of the front-rear joint portion 841 in the width direction W. As a result, at least a part of the side contraction region ER1 (that is, the side contraction region ER1 located outside the maximum side edge EMA of the central low contraction region LER1 in the width direction W) is separated from the inner edge 841EI of the front-rear joint portion 841. Is not arranged inside the width direction W, so that the front-rear joint portion 841 can be made difficult to be pulled inside the width direction W. As a result, the position of the standing base point W in the width direction of the standing portion 82 can be maintained, and the area of the holding region can be maintained. As a result, it is possible to improve the wearing feeling of the wearer while suppressing the leakage of excrement, so that both the holding function of the excrement and the wearing feeling of the wearer can be achieved at the same time.

Further, in the embodiment, the first waist circumference region in which the central low contraction region LER1 is provided is the front waist circumference region S1, that is, it is arranged on the ventral side of the wearer. Since the height of the ventral iliac crest IC is lower than the height of the dorsal iliac crest IC, the internal organs, fat, etc. are covered with the iliac IB on the ventral side as compared with the dorsal side. The area is small. For this reason, the abdomen is more likely to protrude to the outside of the body than the back. Therefore, by arranging the central low contraction region LER1 on the abdomen of the wearer, the region where the abdomen of the wearer is strongly tightened can be reduced and the wearing feeling can be improved.

Further, in the anterior girth region S1, the height of the iliac crest IC increases from the central portion toward the lateral portion. Therefore, in the central portion, the height of the iliac crest IB increases toward the outside of the anterior-posterior direction L (waist opening 17 side). The area covered by is reduced. Therefore, the wearer's body tends to protrude toward the outside of the front-rear direction L, and the circumference CL of the wearer's waist becomes longer. In the present embodiment, the width of the central low contraction region LER1 increases toward the outside of the anteroposterior direction L. As a result, the width of the central low contraction region LER1 becomes wider according to the circumference CL of the wearer's waist, and the region where the wearer's body is not strongly tightened increases. As a result, the wearing feeling can be improved.

Further, as shown in FIG. 7, the front-rear joint portion 841 may overlap the side contraction region ER1 in the thickness direction T. Since the front-rear joint portion 841 is brought into close contact with the wearer's body due to the contraction of the side contraction region ER1, a gap is less likely to occur between the wearer's body and the front-rear joint portion 841. Therefore, leakage of excrement through this gap can be suppressed.

Further, the width of the central low contraction region LER1 may increase toward the outside in the front-rear direction L. In this case, as shown in FIG. 7, the central low shrinkage region LER1 may have a wide region WR and a narrow region NR. The wide region WR extends from the inside of the outer edge 841EO of the front-rear joint portion 841 in the width direction W to the outside of the outer edge 841EO of the front-rear joint portion 841 in the width direction W. The narrow region NR is a region inside the wide region WR in the front-rear direction L. The length LW of the wide region WR in the front-rear direction L may be longer than the length LN of the narrow region NR in the front-rear direction L. Since the leak-proof cuff 80 extends in the front-rear direction L in the inseam region S3, the front-rear joint portion 841 is arranged according to the crotch width of the wearer. Therefore, since the length LW is longer than the length LN, the ratio of the area of the central low shrinkage region LER1 arranged in the region outside the width direction W is larger than the position corresponding to the crotch width of the wearer. Can be done. As a result, the wearer's body is not strongly tightened in a wider area in the region outside the width direction W than the position corresponding to the wearer's crotch width, and the wearing feeling can be improved.

As shown in FIG. 11, on the ventral side of the wearer, the inner portion of the absorption core 31 is in the direction of the non-skin surface side T2 from the lower end of the abdomen in the anteroposterior direction L due to the sitting posture and forward bending (of the wearer). Easy to bend in the direction away from the body). Here, since the difference in rigidity is large before and after the rear end edge 31LR of the waist low basis weight portion 31L, the rear end edge 31LR of the waist low basis weight portion 31L tends to be a bending base point of the absorption core 31. As shown in FIG. 11A, in the front-rear direction L, the inner end edge 841I of the front-rear joint portion 841 is located outside the rear end edge 31LR of the waist low basis weight portion 31L, so that the inner end of the front-rear joint portion 841 is located. The edge 841I is likely to be located outside the bending base point of the absorption core 31 in the front-rear direction L. As a result, the upright portion 82 can stand up from the bending base point of the absorption core 31. Therefore, as shown in FIG. 11B, a gap G is unlikely to occur between the standing base point of the standing portion 82 and the bending base point of the absorption core 31, and it is possible to prevent excrement from leaking from the gap G. In addition, when the inner portion of the absorption core 31 is separated from the wearer's body, the inner portion of the absorption core 31 is also separated from the apex of the standing portion 82 existing on the wearer's body side of the absorption core 31. As a result, the height of the standing portion 82 can be secured, and the leakage of excrement can be suppressed.

The waist elastic member 55 has a first continuous elastic member 55C1 that continuously extends from one side end portion of the front waist circumference region S1 to the other side end portion inside the central low contraction region LER1 in the front-rear direction L. You can. As shown in FIGS. 8 and 9, the wearer wears the absorbent article 1 so that the first continuous elastic member 55C1 is located near the wearer's ilium IB, whereby the front waist circumference region S1 is set to the width direction W. Can be continuously adhered to. Here, since the internal organs, fat, and the like existing inside the ilium IB are less likely to be compressed, the wearer is less likely to feel uncomfortable in the vicinity of the ilium IB even if the anterior waist circumference region S1 is brought into close contact with the wearer's body. Further, when the wearer wears the absorbent article 1 so that the first continuous elastic member 55C1 is located near the ilium IB of the wearer, the central low contraction region LER1 becomes a region above the ilium IB. That is, it is arranged in an area where the circumference of the waist becomes long. Therefore, it is possible to arrange a long region where the wearer's body is not strongly tightened with respect to a portion where the circumference of the waist is long and the wearing feeling tends to deteriorate, and the wearing feeling of the wearer can be improved.

Further, the contraction force of the first continuous elastic member 55C1 may be larger than the contraction force of the other waist elastic member 55. Therefore, there is a region having a higher contractile force than the central low contraction region LER1 and the pair of side contraction regions ER1 inside the central low contraction region LER1 and the pair of side contraction regions ER1 in the anteroposterior direction L. Further, outside the crotch side low contraction region LER1 and the pair of crotch side contraction regions ER2 in the anteroposterior direction L, there is a region having a higher contraction force than the crotch side low contraction region LER1 and the pair of crotch side contraction regions ER2. do. The other waist elastic member 55 may be a waist elastic member 55 having the same waist circumference region as the first continuous elastic member 55C1, or may be a waist elastic member 55 in both the front waist circumference region S1 and the rear waist circumference region S2. .. When the wearer wears the absorbent article 1 so that the first continuous elastic member 55C1 is located near the wearer's iliac IB, the internal organs, fat, etc. are not compressed and the wearer does not feel uncomfortable with the iliac IB. In the vicinity, the first continuous elastic member 55C1 having a large contraction force allows the front waist circumference region S1 to be firmly brought into close contact with the wearer's body.

The first continuous elastic member 55C1 may be arranged 5% to 20% behind the front end edge 16F of the side joint portion 16 in the front waist circumference region S1 with respect to the total length of the absorbent article 1 in the front-rear direction L. As a result, the first continuous elastic member 55C1 can be easily located near the iliac bone IB of the wearer. Further, in the front waist circumference region S1, the first continuous elastic member 55C1 is 20% to 90% forward, preferably 40%, from the rear end edge 16R of the side joint portion 16 with respect to the total length of the side joint portion 16 in the front-rear direction L. It may be located 70% forward, more preferably 45% to 65% forward. As a result, the first continuous elastic member 55C1 can be easily located near the iliac bone IB of the wearer.

The contraction force of the waist elastic member 55 can be measured by, for example, the following method. Measure the length H0 in the width direction W of the effective length portion of the waist elastic member 55 in a state where the absorbent article 1 is extended to the maximum in the front-rear direction L so that the wrinkles generated in the absorbent article 1 cannot be visually recognized. 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 by "contraction force = H0 / H1". Instead of the contraction force, the magnitude of the contraction force may be compared by a count that defines the thickness of the waist elastic member 55.

Further, the first 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 first continuous elastic member 55C1 is unlikely to be hindered, so that the front waist circumference region S1 can be firmly brought into close contact with the wearer's body. Further, since the waist low basis weight portion 31L has a low basis weight, it does not easily swell even if it absorbs excrement. Therefore, even after excretion, the contraction of the first continuous elastic member 55C1 is unlikely to be inhibited, so that the front waist circumference region S1 can be firmly brought into close contact with the wearer's body.

As shown in FIG. 7, the central low shrinkage region LER1 may overlap the outer edge 31O of the absorption core 31 in the front-rear direction L and the thickness direction T. Since the outer end edge 31O of the absorption core 31 has lower rigidity than the inner portion (hereinafter, the inner core portion) in the front-rear direction L than the outer end edge 31O of the absorption core 31, it easily shrinks in the width direction W. When the outer edge 31O of the absorption core 31 contracts in the width direction W, the larger the shrinkage difference between the outer edge 31O of the absorption core 31 and the inner core portion, the more the inner core portion releases the force applied in the width direction W. Therefore, the inner core portion is easily separated from the wearer's body. When the central low shrinkage region LER1 overlaps the outer end edge 31O of the absorption core 31 in the thickness direction T, the outer end portion of the absorption core 31 including the outer end edge 31O of the absorption core 31 is unlikely to shrink in the width direction W. can do. As a result, the absorption core 31 becomes difficult to separate from the body, the excrement can easily reach the absorption core 31, and the leakage of the excrement can be further suppressed.

The central low shrinkage region LER1 may overlap the extending portion 24 in the thickness direction T. As described above, the abdomen and the back tend to protrude toward the outside of the body toward the outside in the anterior-posterior direction. The abdomen and back protrude more toward the outside of the body than the region overlapping in the thickness direction T (hereinafter referred to as the core region). Here, the thickness of the extension region is thinner than the thickness of the core region because there is no absorption core 31. When the width of the waist circumference area is constant, the thinner the thickness, the lower the pressure applied, so that the pressure applied in the extension region is lower than the pressure applied in the core region. By overlapping the central low contraction region LER1 with low contraction force in the thickness direction T, the extension portion 24 has a low pressure applied to the portion where the abdomen and back protrude from the core region and does not tighten strongly. The protruding area can be arranged, and the wearing feeling of the wearer can be improved.

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 extending portion 24 in the thickness direction T. In this case, as shown in FIG. 10C, the extension portion 24 is contracted in the width direction W with a weak force, so that a small gap can be generated between the extension portion 24 and the wearer's body. As a result, it is possible to improve the air permeability of the region where excrement is likely to get stuffy by overlapping with the extending portion 24 in the front waist circumference region S1 while suppressing the leakage of excrement by reducing the gap. It is possible to reduce the discomfort caused by the wearer's stuffiness and improve the wearing feeling.

The central low contraction region LER1 may overlap the region outside the front-rear direction L with respect to the outer edge 24F of the extension portion 24 in the thickness direction T. In the region outside the extending portion 24 in the anteroposterior direction L from the outer edge 24F (hereinafter, the outer region), the abdomen and the back protrude more toward the outside of the body than the extending region. Since the thickness of the outer region is thinner than the thickness of the extension region due to the absence of the extension portion 24, the pressure applied to the outer region is lower than the pressure applied to the extension region. In addition, since the outer region overlaps the central low contraction region LER1 with low contraction force in the thickness direction T, the pressure applied is low and strong with respect to the portion where the abdomen and back protrude from the extension region. The outer region that is not tightened can be arranged, and the wearing feeling of the wearer can be further improved.

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

Further, in the width direction W, the maximum side edge EMA of the central low shrinkage region LER1 may be located outside the inner edge 842EI of the width joining portion 842. As a result, at least a part of the side contraction region ER1 is not arranged inside the width direction W with respect to the inner edge 842EI of the width joint portion 842, so that the width joint portion 842 is less likely to be pulled inward in the width direction W. can. Since the inner edge 842EI of the width joint portion 842 serves as a base point for the standing portion 82 to stand, the standing portion 82 is less likely to be pulled inward in the width direction W together with the width joint portion 842. As a result, the excrement is easily absorbed by the absorption core 31 before reaching the upright portion 82, and the leakage of the 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 body 20. As a result, at least a part of the side contraction region ER1 is not arranged inside the side edge 20E of the absorbent body 20 in the width direction W, so that the absorbent body 20 is less likely to be pulled inward in the width direction W. can. As a result, the absorbent main body 20 is less likely to shrink in the width direction W, so that the area of the absorbent main body 20 can be secured and excrement can be suppressed from leaking from the absorbent main body 20.

Further, in the width direction W, the maximum side edge EMA of the central low shrinkage region LER1 may be located outside the leg elastic member 75. When the absorbent article 1 has a plurality of leg elastic members 75, the maximum side edge EMA may be located at least outside the innermost leg elastic member 75 in the width direction W, and may be located outside the outermost leg elastic member 75. May also be located on the outside. By contracting the leg elastic member 75 in the front-rear direction L, the leg gather 70 on which the leg elastic member 75 is arranged can be aligned with the wearer's legs, and excrement can be prevented from leaking to the outside. Here, the maximum side edge EMA of the central low contraction region LER1 is located outside the leg elastic member 75, so that at least a part of the side contraction region ER1 is inside the leg elastic member 75 in the width direction W. Since it is not arranged, the leg elastic member 75 can be made difficult to be pulled inward in the width direction W. As a result, the position of the leg gather 70 in the width direction W can be maintained, and the area of the holding region for holding the excrement can be maintained.

Further, in the width direction W, the minimum side edge EMI of the central low shrinkage region LER1 may be located inside the leg elastic member 75. When the absorbent article 1 has a plurality of leg elastic members 75, the smallest side edge EMI may be located inside the outermost leg elastic member 75 and inside the innermost leg elastic member 75. May be located. Due to the contraction of the side contraction region ER1, the leg elastic member 75 approaches the wearer's body side. The gap between the absorbent article 1 and the wearer's body is reduced in the vicinity of the leg elastic member 75, and leakage of excrement 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 absorption core 31. As a result, the side edge 31E of the absorption 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 in the vicinity of the side edge 31E of the absorbing core 31, and leakage of excrement can be suppressed.

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

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

Further, in the width direction W, the inner edge of the crotch side contraction region ER2 may be located outside the side edge of the waist low basis weight portion 31L. As a result, even if the crotch 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 waist low basis weight portion 31L has the waist low basis weight portion 31L in the width direction. The force to contract does not work. Further, the contraction of the side contraction region ER1 pulls the waist low basis weight portion 31L to the outside in the width direction W. As a result, the waist low basis weight portion 31L, which has lower rigidity than the surroundings and easily shrinks in the width direction W, does not easily shrink in the width direction W, so that the absorption area of the absorption core 31 can be secured and excrement leaks. It can be suppressed.

Further, the inner edge of the crotch side contraction region ER2 may be located outside the slit 35. Since the slit 35 of the absorption core 31 has lower rigidity than the surroundings, it is easily crushed in the width direction W. Here, the inner edge of the crotch side contraction region ER2 is located outside the slit 35 of the absorption core 31 in the width direction W. Therefore, even if the crotch 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 contracts the slit 35 in the width direction W does not act on the slit 35. As a result, the slit 35 is less likely to be crushed in the width direction W. When the slit 35 is not crushed in the width direction W, a difference in rigidity is generated in the width direction W due to the slit 35, so that the absorption core 31 can be easily bent in the width direction W with the slit 35 as a base point. By bending the absorption core 31 in the width direction W, the absorption core 31 can be easily stored in the inseam area S3, so that the wearing feeling can be improved.

The inclination (L1 / W1) of the length L1 in the anteroposterior 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 contraction region LER1 is the anteroposterior direction of the crotch side low contraction region LER2. It may be 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 in L to the minimum side edge EMI of the central low contraction region LER1. In young infants with short stature, the change in the perimeter CL of the ventral waist circumference in the anterior-posterior direction L is larger than that in adults. Therefore, on the outer side of the anterior-posterior direction L than the ilium IB, the circumference CL of the ventral waistline begins to increase from a distance close to the ilium IB. Therefore, by reducing the inclination from the minimum side edge EMI to the maximum side edge EMA (inclination L1 / W1 of the side edge of the central low contraction region LER1), the center is adjusted according to the circumference CL of the waist of a young infant. The width of the low shrinkage region LER1 can be widened early. As a result, it is possible to arrange a region that does not strongly tighten the body according to the circumference CL of the young child, so that the wearing feeling of the young child can be improved.

The maximum side edge EMA, which is likely to be arranged above the iliac crest IR, is located outside the width direction W from the center of the width direction W between the side joint 16 and the side edge 20E of the absorbent body 20. You may. Further, in consideration of the shape of the iliac bone IB, in order to secure a wider area outside the absorbent body 20 in the width direction W where the body is not strongly tightened, the first one overlapping the absorbent body 20 in the thickness direction T. The most of the first discontinuous elastic members 55N that do not overlap the absorbent body 20 in the thickness direction T from the inner edge of the first discontinuous elastic member 55N that is the outermost of the discontinuous elastic members 55N in the front-rear direction L. The length of the width direction W to the inner edge of the first discontinuous elastic member 55N inside the front-rear direction L is the length of the width direction W between the inner end edges of the first discontinuous elastic member 55N1 adjacent to the front-rear direction L. It may be the largest of them.

Further, the dorsal low contraction region LERR may overlap the absorption core 31 in the thickness direction T. The width of the dorsal low contraction region LERR may be wider than the width of the crotch side low contraction region LER2. As a result, the dorsal absorption core 31 can be made less likely to shrink in the width direction W than the ventral absorption core 31. As a result, a large absorption area of the absorption core 31 on the dorsal side can be secured, and a wide accommodation space for stool can be secured. As a result, it is possible to suppress the leakage of excrement.

(5) Other Embodiments The above-described embodiments and modifications are for the purpose of exemplifying explanations, and the present invention may be implemented in other embodiments. For example, the central low contraction region LER1 may be provided in the rear waist circumference region S2, or the central low contraction region LER1 may be provided in both the front waist circumference region S1 and the rear waist circumference region S2.

Further, in the width direction W, the minimum side edge EMI of the central low shrinkage region LER1 may be located outside the side edge of the absorption core 31. As a result, all the side contraction regions ER1 are not arranged inside the width direction W with respect to the side edge of the absorption core 31, so that the absorption core 31 can be made difficult to be pulled inward in the width direction W. As a result, the absorption core 31 is less likely to shrink in the width direction W, so that the absorption area of the absorption core 31 can be secured and the leakage of excrement can be suppressed.

Further, in the width direction W, the inner edge of the crotch side contraction region ER2 may be located inside the side edge of the absorbent body 20. Further, 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. Since the dorsal side of the absorbent body 20 hits the caregiver's arm by hugging or the floor depending on the sleeping posture, the dorsal absorbent body 20 is wider than the ventral absorbent body 20. Easy to shift. 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 that hangs on the absorbent body when the absorbent body is displaced in the width direction. The stretching force of the crotch side contraction region ER2 can be made larger than the stretching force of the crotch side contraction region ER2. As a result, the elastic force of the dorsal side contraction region ERR becomes larger according to the deviation of the absorbent body 20 in the width direction W, so that the absorbent body 20 on the dorsal side can be made less likely to be displaced in the width direction W. ..

It should be noted that the above-described embodiments, modifications, and configurations of the absorbent article 1 according to the other embodiments can be combined as appropriate. The present invention is not limited to what is described herein. It can be implemented as an amendment or modification without deviating from the gist and scope of the present invention determined by the description of the claims.

1: Absorbent article 20: Absorbent body 24: Extension 31: Absorption core 31L: Waist low basis weight portion 55: Waist elastic member 55CF: Front continuous elastic member (continuous elastic member)
80: Leakage-proof cuff 82: Standing portion 84: Joint portion 841: Front and rear joint portion ER1: Side contraction region LER1: Central low contraction region MA: Maximum width MI: Minimum width WR: Wide region NR: Narrow region

Claims (12)

The front-back direction, the width direction orthogonal to the front-back direction, and the thickness direction,
A girth area composed of a first girth area and a second girth area, and an inseam area sandwiched between the first girth area and the second girth area in the front-rear direction.
Absorption core containing absorbent material and
It has a waist elastic member arranged in a state of being extended in the width direction in the first waist circumference region, and has.
A central low shrinkage region straddling the width center, which is the center of the absorbent article in the width direction in the first waist circumference region, and a pair of side shrinkage regions adjacent to both outer sides of the central low shrinkage region in the width direction. Is provided,
An absorbent article in which the widthwise contraction force of the central low shrinkage region is lower than the widthwise contraction force of the side contraction region.
It has a pair of leak-proof cuffs that extend in the anterior-posterior direction at least in the inseam area and are arranged on both sides of the width center.
The pair of leak-proof cuffs
An upright portion that can stand up toward the skin surface due to the contraction in the anteroposterior direction,
It has a front-rear joint portion that is located outside the front-rear direction with respect to the upright portion and is joined so as not to stand up toward the skin surface side.
The central low shrinkage region has a minimum width and a maximum width located outside the front-rear direction with respect to the minimum width.
An absorbent article in which the inner edge of the central low shrinkage region is located outside the inner edge of the anterior-posterior joint in the anterior-posterior direction. The absorbent article according to claim 1, wherein the first waist circumference area is arranged on the ventral side of the wearer. The absorbent article according to claim 1 or 2, wherein the width of the central low shrinkage region widens toward the outside in the anteroposterior direction. The absorbent article according to any one of claims 1 to 3, wherein the front-rear joint portion overlaps the side contraction region in the thickness direction. The first waist circumference area is arranged on the ventral side of the wearer.
The width of the central low shrinkage region widens toward the outside in the anteroposterior direction.
The central low shrinkage region
A wide region extending from the inside of the front-rear joint in the width direction to the outside of the outer edge of the front-rear joint in the width direction.
It has a narrow region which is an inner region in the front-rear direction with respect to the wide region.
The absorbent article according to any one of claims 1 to 4, wherein 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. The first waist circumference area is arranged on the ventral side of the wearer.
The absorption core has a waist low basis weight portion in which the basis weight is lower than the surrounding area in the first waist circumference area.
The waist low basis weight portion has a trailing edge in the first waist circumference area and has a trailing edge.
The absorbent article according to any one of claims 1 to 5, wherein the inner end edge of the front-rear joint portion is located outside the rear end edge of the waist low basis weight portion in the front-rear direction. 1 The absorbent article according to any one of 6 to 6. The absorbent article according to claim 7, wherein the contraction force of the continuous elastic member is larger than the contraction force of another waist elastic member. The absorption core has a waist low basis weight portion having a basis weight lower than that of the surroundings in the first waist circumference region.
The absorbent article according to claim 7 or 8, wherein the continuous elastic member overlaps the waist low basis weight portion in the thickness direction. The absorbent article according to any one of claims 1 to 9, wherein the central low shrinkage region overlaps the outer edge of the absorption core in the front-rear direction and the thickness direction. It has the absorbing core and has an absorbing body extending from the inseam area to the first waistline area.
The absorbent body has an extension extending outward in the anteroposterior direction from the outer edge of the absorbent core.
The absorbent article according to claim 10, wherein the central low shrinkage region overlaps the extending portion in the thickness direction. The absorbent article according to claim 11, wherein the central low shrinkage region overlaps the outer region in the front-rear direction with respect to the outer edge of the extension portion in the thickness direction.

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