JP7642452B2 - Absorbent articles - Google Patents

Description

The present invention relates to an absorbent article.

The absorbent article typically includes an absorbent body mainly made of a water-absorbent material such as pulp or a water-absorbent polymer.
The present applicant has proposed a disposable diaper comprising an absorbent main body having both side portions in the crotch region which can stand up, and an outer body located on the non-skin-contacting side of the absorbent main body, with leak-proof cuffs formed from a leak-proof cuff-forming sheet and an elastic member, and with an elastic member fixed around the legs between the leak-proof cuff-forming sheet and the outer body (see Patent Document 1).

The applicant has also proposed a disposable diaper that includes an absorbent body having a central absorbent body, a pair of side absorbent bodies, and a cut-off portion, and a cover sheet that covers the entire absorbent body, in which the cover sheet located on the skin-contacting side of the cut-off portion and the cover sheet located on the non-skin-contacting side are bonded and fixed with an adhesive (see Patent Document 2).

JP 2006-81651 A JP 2006-247363 A

The absorbent articles described in Patent Documents 1 and 2 have good side leakage prevention and leak prevention properties, but there is room for improvement in order to further improve the leak prevention properties, particularly the performance in preventing side leakage of body fluids from the crotch area.

Therefore, the present invention is concerned with providing an absorbent article that has excellent leak-proofing properties against bodily fluids.

The present invention provides an absorbent article having a longitudinal direction corresponding to the front-to-rear direction of a wearer and a width direction perpendicular thereto, the article comprising: inner leakproof cuffs provided with a first stretchable region located at a side edge along the longitudinal direction of an absorbent core and stretchable in the longitudinal direction; a second stretchable region extending along the longitudinal direction and stretchable in the longitudinal direction; and outer leakproof cuffs provided with a third stretchable region extending along the longitudinal direction and stretchable in the longitudinal direction, the inner leakproof cuffs being provided with a third stretchable region extending along the longitudinal direction and stretchable in the longitudinal direction,
Each of the stretchable regions is configured by disposing an elastic member extending along the longitudinal direction in a stretched state between a pair of opposing nonwoven fabrics,
The absorbent article is provided, in which the elasticated zones are formed so as to be parallel to each other in a plan view when the absorbent article is in an unfolded and maximum extended state.

The present invention provides an absorbent article with excellent leak-proofing properties against bodily fluids.

FIG. 1 is a perspective view showing a typical natural state of a pants-type disposable diaper which is one embodiment of the absorbent article of the present invention. FIG. 2 is a developed plan view that shows a schematic view of the skin-facing side (top sheet side) of the absorbent article shown in FIG. 1 in a developed and stretched state. FIG. 3 is a cross-sectional view that typically shows a cross section of the absorbent article shown in FIG. 2 taken along line II. FIG. 4 is a cross-sectional view that shows a schematic cross section of the absorbent article shown in FIG. 2 in a relaxed state, taken along line II. FIG. 5 is a cross-sectional view that typically illustrates the absorbent article of the present invention in a worn state. FIG. 6 is a cross-sectional view that illustrates a cross section along the thickness direction of one embodiment of an absorbent sheet. FIG. 7 is a schematic perspective view of the absorbent sheet shown in FIG.

The present invention will now be described based on preferred embodiments with reference to the drawings. Figures 1 to 4 show one embodiment of a pants-type disposable diaper, which is a preferred embodiment of the absorbent article of the present invention.

As shown in Figures 1 and 2, a pants-type disposable diaper (hereinafter, simply referred to as a "diaper") 1 as an absorbent article has a ventral region F arranged on the ventral side of a wearer when worn, a dorsal region R arranged on the dorsal side, and a crotch region M located between the ventral region F and the dorsal region R. The diaper 1 has a longitudinal direction X that extends from the ventral side of the wearer through the crotch region to the dorsal side, corresponding to the front-to-rear direction of the wearer, and a width direction Y that is perpendicular thereto. The ventral region F, the crotch region M, and the dorsal region R extend continuously along the longitudinal direction X, which is the front-to-rear direction of the wearer. The crotch region M has an excretory part facing portion (not shown) that is arranged facing the excretory part of the wearer when the diaper 1 is worn.

In this specification, the "skin-facing side" refers to the side of the absorbent article or its constituent member (e.g., absorbent body) that faces the wearer's skin when the absorbent article is worn, i.e., the side relatively close to the wearer's skin, and the "non-skin-facing side" refers to the side of the absorbent article or its constituent member that faces the opposite side from the skin when the absorbent article is worn, i.e., the side relatively far from the wearer's skin. Note that "when worn" here refers to the normal, appropriate wearing position, i.e., the state in which the absorbent article is maintained in the correct wearing position.

As shown in Figs. 1 and 2, the diaper 1 comprises an absorbent body 2 capable of absorbing and retaining excrement, and an exterior body 10 arranged on the non-skin-facing side of the absorbent body 2. The exterior body 10 is a member that forms the outer shape of the diaper 1. The periphery of the exterior body 10 forms the contour lines of the ventral region F and the back region R of the diaper 1, respectively. The exterior body 10 comprises a ventral exterior body 10F that extends in the width direction Y and is arranged in the ventral region F, and a back exterior body 10R that is separate from the ventral exterior body 10F and extends in the width direction Y and is arranged in the back region R. In other words, the diaper 1 in this embodiment is a pants-type disposable diaper known as a split type. The absorbent body 2 extends in the longitudinal direction X from the ventral region F to the back region R, and is arranged so as to bridge between the ventral exterior body 10F and the back exterior body 10R that are arranged at a predetermined interval in the longitudinal direction X.

The diaper 1 has a pair of side seals S, S formed by joining both sides in the width direction Y of the ventral outer body 10F and both sides in the width direction Y of the dorsal outer body 10R together. This connects the outer bodies 10F, 10R in a ring shape. The diaper 1 also has a waist opening WH through which the wearer's torso passes, and a pair of leg openings LH through which the wearer's lower legs pass. The side seals S are formed by a joining method such as adhesive, heat sealing, or ultrasonic sealing.

In this specification, the "unfolded and maximum stretched state" of the absorbent article or diaper 1 refers to the state in which the diaper 1 is separated at the side seal portion S to be unfolded, and the elastic members of the diaper 1 in the unfolded state are stretched to their maximum extent, until they are the same as the design dimensions, i.e., the dimensions when the diaper 1 is unfolded flat with all the influence of the elastic members eliminated.

The absorbent body 2 is composed of a liquid-permeable top sheet 3 arranged relatively close to the wearer's skin, a liquid-impermeable or poorly liquid-permeable or water-repellent back sheet 4 arranged relatively far from the wearer's skin, and an absorbent body 5 arranged between the two sheets 3, 4. These components that make up the absorbent body 2 are joined together by a known joining method such as an adhesive.

The top sheet and back sheet can be any sheet that has been conventionally used in absorbent articles such as disposable diapers, without any particular restrictions. For example, the top sheet can be made of various nonwoven fabrics. The back sheet can be made of a resin film or a laminate of a resin film and a nonwoven fabric. The core wrap sheet can be made of the same material as the top sheet. The sheet for forming the leak-proof cuffs can be made of the same material as the back sheet.

In this embodiment, the top sheet 3 is a top sheet that covers the skin-facing surface of the absorbent body 5 and has an uneven shape 30 formed on its surface including multiple convex portions and concave portions located around the convex portions. Alternatively, a flat sheet that does not have an uneven shape may be used as the top sheet 3.

As shown in Figures 3 and 4, the top sheet 3 crosses the skin-facing side of the absorbent body 5 (a pair of absorbent body standing parts 50 and non-standing parts 51 described below) in the width direction Y, and the extension parts 3E from both side parts (a pair of absorbent body standing parts 50, 50) along the longitudinal direction X of the absorbent body 5 of the top sheet 3 are wrapped around the non-skin-facing side of the absorbent body 5.

In this embodiment, the pair of extensions 3E, 3E of the topsheet 3 are fixed between the absorbent body 5 and a leakage-preventive cuff-forming sheet 80 described below at first base ends 81 of the inner leakage-preventive cuffs 8 described below. The topsheet 3 does not cover the entire non-skin-facing surface of the absorbent body 5, and the central portion in the width direction Y of the non-skin-facing surface of the absorbent body 5 (the portion located between the pair of first base ends 81, 81) is not covered by the topsheet 3.
In this embodiment, the top sheet 3 is large enough to cover the entire skin-facing surface of the absorbent body 5, covers the entire skin-facing surface of the absorbent body 5 and both side edges along the longitudinal direction X of the absorbent body 5, and further covers a predetermined area extending inward in the width direction Y from both side edges on the non-skin-facing surface of the absorbent body 5.

The absorbent body 5 typically comprises an absorbent core 6 and a core wrap sheet (not shown) that covers the absorbent core 6. The absorbent core 6 comprises at least one of a stack of absorbent natural fibers such as pulp fibers, a mixed stack containing absorbent natural fibers and absorbent polymers, and/or an absorbent sheet having two identical or different fiber sheets and particles of absorbent polymers arranged between the fiber sheets. When the absorbent core comprises both a stack and an absorbent sheet, the sizes of the stack and absorbent sheet in a plan view may be the same or different. The core wrap sheet is made of tissue paper or a water-permeable nonwoven fabric. The core wrap sheet preferably covers the entire skin-facing side and non-skin-facing side of the absorbent core.

As shown in Figs. 2 and 3, the absorbent core 6 of this embodiment has a laminated structure having an absorbent sheet 60 located on the non-skin-facing side and an auxiliary layer 61 arranged adjacent to the skin-facing side of the absorbent sheet 60. The auxiliary layer 61 is preferably a mixed stack containing at least absorbent natural fibers and absorbent polymers. The absorbent core 6 having such a laminated structure is arranged at least in the crotch region M, and is arranged continuously in at least one of the ventral region F and the dorsal region R in addition to the crotch region M.

In this embodiment, as shown in FIG. 2, the absorbent sheet 60 is rectangular in plan view and is disposed over the entire abdominal region F, crotch region M, and back region R with the longitudinal direction of the absorbent sheet 60 aligned with the longitudinal direction X of the diaper 1. The auxiliary layer 61 has a shape smaller than the planar area of the absorbent sheet 60, and has a portion where the length in the width direction Y increases continuously or stepwise when the auxiliary layer 61 is viewed from the back region R toward the abdominal region F.

In at least the crotch region M of the diaper 1, the absorbent core 6 is configured such that the width in the width direction Y of the auxiliary layer 61 is shorter than the width in the width direction Y of the absorbent sheet 60, and the width direction side regions of the absorbent sheet 60 have portions that extend outward in the width direction Y from both side edges of the auxiliary layer 61 in the width direction Y. On the other hand, the length in the width direction Y of the auxiliary layer 61 in the abdominal region F is approximately the same as the length in the width direction Y of the absorbent sheet 60.

The absorbent body 5 having an absorbent core 6 has, at least in the crotch region M, a pair of absorbent body standing portions 50, 50 located on both sides of the center of the absorbent body 5 in the width direction Y, which stand up toward the wearer's skin when worn, and a non-standing portion 51 located in the center and sandwiched between the pair of absorbent body standing portions 50, 50.
In this embodiment, the absorbent sheet 60 is disposed continuously with both the absorbent standing portion 50 and the non-standing portion 51, and both the absorbent standing portion 50 and the non-standing portion 51 include the absorbent sheet 60. On the other hand, the auxiliary layer 61 is disposed in the non-standing portion 51 but not in the absorbent standing portion 50.

The diaper 1 is provided with a first elasticated zone A1 that is located at a side edge along the longitudinal direction X of the absorbent core 6 and is elastic in the longitudinal direction. The first elasticated zone A1 in this embodiment is disposed so as to extend in the longitudinal direction X.
In this embodiment, as shown in Figs. 2 and 3, a pair of side elastic members 52 for raising the absorbent rising portion 50 is arranged on both sides of the absorbent core 6 in the longitudinal direction X of the absorbent 5. The side elastic member 52 is arranged in a stretched state so as to extend along the longitudinal direction X between the absorbent 5 and the top sheet 3 that is folded in two and opposed along both sides of the absorbent 5 along the longitudinal direction X. The side elastic member 52 is arranged at least in the crotch region M. In this embodiment, both ends of the side elastic member 52 extend to both ends of the absorbent core 6 in the longitudinal direction X, and are arranged continuously in the abdominal region F, the crotch region M, and the back region R. At least both ends of the side elastic member 52 are fixed to at least the absorbent 5 and further to the top sheet 3 by a known fixing method such as an adhesive. The side elastic member 52 may be one as shown in the figure, or may be multiple.

In this embodiment, a pair of side elastic members 52 are disposed on both sides of the absorbent core 6 along the longitudinal direction X between the absorbent body 5 including the absorbent core 6 and the top sheet 3 that is folded in half to face each other, thereby forming a first elastic zone A1 at least in the crotch region M. In other words, the first elastic zone A1 is the region in the absorbent body 5 where the side elastic members 52 are disposed, and this region has elasticity in the longitudinal direction X.

The side elastic members 52 are fixed in a stretched state to both sides of the absorbent body 5 in the width direction Y, so that when the diaper 1 is worn, as shown in FIG. 4, both sides of the absorbent body 5 in the width direction Y stand up as a pair of absorbent body standing parts 50, 50 due to contraction of the side elastic members 52. At this time, the absorbent body 5 forms a tray shape with the non-standing part 51 as the bottom and a pair of absorbent body standing parts 50, 50 extending obliquely from the bottom towards the wearer's skin as the sides.

2 and 3, the auxiliary layer 61 has low basis weight sections 65 that penetrate the auxiliary layer 61 in the thickness direction and extend in the longitudinal direction X. The low basis weight sections 65 are sections in which the basis weight of the constituent material of the auxiliary layer 61 is less than that of the areas of the auxiliary layer 61 other than the low basis weight sections 65, or are sections in which the constituent material of the auxiliary layer 61 is not present. In the latter case, the low basis weight sections 65 are grooves without a bottom. In this embodiment, the low basis weight sections 65 are each rectangular extending along the longitudinal direction X and are intermittently arranged in the width direction Y in the area including the crotch region M.

2, a plurality of low basis weight portions 65 are intermittently arranged in the width direction Y in the crotch region M. Each of the pair of low basis weight portions 65 has a shape that is long in the longitudinal direction X in a plan view, for example, a rectangular shape. The low basis weight portions 65 may extend from the crotch region M to the abdominal region F, or may extend from the crotch region M to the dorsal region R.
By providing the low basis weight portion 65 in the auxiliary layer 61, when the diaper is subjected to an external force such as body pressure, the low basis weight portion functions as a flexible axis, facilitating the deformation of the absorbent body 5 to conform to the wearer's body shape. As a result, the discomfort felt when wearing the diaper is reduced, and the comfort and fit of the diaper are improved. In addition, the low basis weight portion 65 functions as a flow path for excreted liquid, and therefore the high absorption performance of the absorbent body 5 can be effectively achieved.

In the diaper 1 of this embodiment, a pair of inner leakage preventing cuffs 8, 8 are provided separately from the absorbent main body 2 on both sides along the longitudinal direction X of the absorbent main body 2. Each inner leakage preventing cuff 8 is independently configured to include a liquid-resistant or water-repellent and breathable leakage preventing cuff-forming sheet 80, and includes opposing portions formed by folding the sheet 80 in half along the longitudinal direction. Each inner leakage preventing cuff 8 (leak preventing cuff-forming sheet 80) is continuously arranged along the side portion along the longitudinal direction X of the absorbent main body 2 over substantially the entire length of the absorbent main body 2 in the longitudinal direction X.

As the leak-proof cuff forming sheet 80, any material that is used as a leak-proof cuff material in this type of absorbent article, such as nonwoven fabric, can be used without any particular restrictions. For example, a single-layer or multi-layer water-repellent nonwoven fabric, a laminate material of a resin film and a nonwoven fabric, etc. can be used.

The inner leakproof cuff 8 has a first base end 81 where the leakproof cuff-forming sheet 80 is fixed to another member, and a first standing portion 82 where the sheet 80 stands on the wearer side. The first standing portion 82 is a portion of the leakproof cuff-forming sheet 80 that is not fixed to another member. The first standing portion 82 is present at least in the crotch region M.

The first base end 81 is the part that constitutes the standing base end or the standing base end when the first standing portion 82 stands toward the wearer's skin when the diaper 1 is worn, and is the part where the leakproof cuff-forming sheet 80, such as a nonwoven fabric, is fixed to another member, specifically the absorbent body 2 and/or the outer body 10, by a known fixing method such as an adhesive such as hot melt or heat fusion. The first base end 81 extends continuously or discontinuously in the longitudinal direction X over substantially the entire length of the leakproof cuff-forming sheet 80 in the longitudinal direction X.

The first standing portion 82 is configured to include a second stretchable region A2 that extends in the longitudinal direction X and is stretchable in the longitudinal direction.
In this embodiment, as shown in Fig. 3, a first leakage-preventing cuff-forming elastic member 83 is arranged in a stretched state so as to extend along the longitudinal direction X at the free end of the first standing portion 82. A second leakage-preventing cuff-forming elastic member 84 is arranged in a stretched state so as to extend along the longitudinal direction X at an intermediate position between the free end of the first standing portion 82 and the first base end 81. Each elastic member 83, 84 is fixed in a stretched state between a pair of leakage-preventing cuff-forming sheets 80, 80 that are folded in half along the longitudinal direction X and opposed to each other by a fixing method such as adhesive. Each elastic member 83, 84 is independently arranged at least in the crotch region M. In this embodiment, each elastic member 83, 84 has both ends that independently extend to both ends of the inner leakage-preventing cuff 8 in the longitudinal direction X, and is continuously arranged in the abdominal region F, the crotch region M, and the back region R.
There is no particular limitation on the number of elastic members 83, 84, and each may be independently one or more. Alternatively, only one or more first leakage-preventing cuff-forming elastic members 83 may be provided, and the second leakage-preventing cuff-forming elastic members 84 may be omitted.
In the above-described embodiment, an example has been described in which one leakage-preventive cuff-forming sheet 80 is folded in half along the longitudinal direction X to form a pair of sheets facing each other. However, this is not limited to this form, and two separate leakage-preventive cuff-forming sheets 80 may be arranged facing each other, and the above-described elastic members 83, 84 may be arranged between the pair of nonwoven fabrics.

With the above-mentioned configuration, the first standing portion 82 has a region that is stretchable in the longitudinal direction X at least at the free end where the elastic member 83 is disposed, and the free end including the elastic member 83 constitutes the second elasticated zone A2 in this embodiment. The first elasticated zone A1 and the second elasticated zone A2 are provided separately, and the second elasticated zone A2 is formed to be parallel to the first elasticated zone A1 when the diaper is in an extended state. "Parallel" includes both cases where the first elasticated zone A1 and the second elasticated zone A2 are parallel in the strict sense, where they do not cross each other at all, and cases where the first elasticated zone A1 and the second elasticated zone A2 are formed in a meandering manner to the extent that they do not cross each other.
As shown in the embodiment described above, when each elastic member 83, 84 is fixed between the leakproof cuff-forming sheets 80 which are the same member, the inner leakproof cuff 8 can have two stretch zones: one formed by the elastic member 83 and the other formed by the elastic member 84. However, the stretch zones formed as a result of different elastic members being placed between the same sheets are not included in the term "separately provided" in this specification.

It is preferable that at both ends of the inner leakage preventing cuff 8 in the longitudinal direction X, a standing inhibition portion 88 is formed, which is a portion where the standing of the leakage preventing cuff forming sheet 80 is inhibited. A pair of the standing inhibition portions 88 is formed in each of the ventral region F and the dorsal region R, and the portion along the longitudinal direction sandwiched between the standing inhibition portions 88, 88 is the first standing portion 82. The standing inhibition portion 88 is typically formed by fixing the leakage preventing cuff forming sheet 80 to the skin-facing surface (top sheet 3) of the absorbent body 2.

A pair of rising inhibition parts 88 are formed at both ends of the inner leakage prevention cuff 8 in the longitudinal direction X, and therefore, when the diaper 1 is worn, a first rising part 82, which is a part sandwiched between the two rising inhibition parts, rises from the first base end 81 as the rising base end toward the skin side of the wearer due to the contraction force of the leakage prevention cuff-forming elastic members 83, 84. In such a rising state of the inner leakage prevention cuff 8, the rising first rising part 82 blocks the outward movement of bodily fluids, such as urine excreted by the wearer, in the width direction Y, and thus, in combination with the blocking effect of the bodily fluids by the pair of absorber rising parts 50, 50 on both sides of the absorber 5 in the width direction Y, side leakage is effectively suppressed, particularly in the crotch region M.
Furthermore, although not shown in the figure, when the inner leakproof cuff 8 is in the upright state, the contractile force of the leakproof cuff-forming elastic members 83, 84 causes the entire diaper 1 to curve and deform so that the central portion of the absorbent body 2 in the longitudinal direction X becomes convex toward the non-skin-facing side (the back sheet 4 side), making it easier for the diaper 1 to fit the wearer's body shape.

The diaper 1 has a pair of outer leakage prevention cuffs 9 extending in the longitudinal direction at least on both sides in the width direction Y in the crotch region M. In the unfolded and stretched state of the diaper shown in FIG. 2, the outer leakage prevention cuffs 9 are located separately outboard of the inner leakage prevention cuffs 8 in the width direction Y, and include a third stretchable region A3 extending in the longitudinal direction X and stretchable in the longitudinal direction. The third stretchable region A3 is provided separately from the first stretchable region A1 and the second stretchable region A2, and is formed so as to be mutually parallel to the first stretchable region A1 and the second stretchable region A2 when the diaper is in the maximum stretched state.

The outer leakproof cuffs 9 are each independently configured to include a liquid-resistant or water-repellent and breathable outer leakproof cuff-forming sheet 90, similar to the inner leakproof cuffs 8, and include opposing portions formed by folding the sheet 90 in half along the longitudinal direction. Each outer leakproof cuff 9 is continuously arranged in the longitudinal direction over at least the entire crotch region M on both sides of the absorbent body 2 in the width direction Y.

The outer leakproof cuff 9, like the inner leakproof cuff 8, has a second base end 91 where the outer leakproof cuff forming sheet 90 is fixed to another member, and a second standing portion 92 where the sheet 90 can stand up towards the wearer. The second standing portion 92 is a portion of the leakproof cuff forming sheet 90 that is not fixed to another member. The second standing portion 92 is present at least in the crotch region M.

The second base end 91 is the part that becomes the rising base end when the second standing portion 92 rises toward the wearer's skin when the diaper 1 is worn, and is the part where the outer leakage prevention cuff forming sheet 90 such as a nonwoven fabric is joined to another member, specifically the non-skin facing side of the absorbent body 2. The second base end 91 extends continuously or discontinuously in the longitudinal direction X over substantially the entire length of the outer leakage prevention cuff forming sheet 90 in the longitudinal direction X.

The second standing portion 92 is configured to include a third stretchable region A3 that extends in the longitudinal direction X and is stretchable in the longitudinal direction.
3, one or more outer leakage preventing cuff forming elastic members 93 are arranged in a stretched state so as to extend along the longitudinal direction X at the free end of the second standing portion 92. Each elastic member 93 is fixed in a stretched state between the outer leakage preventing cuff forming sheets 90 that are folded in half along the longitudinal direction X and opposed to each other by a fixing method such as adhesive. In this embodiment, one end of each of the elastic members 93 is located in the abdominal region F and the other end is located in the dorsal region R, and each elastic member 93 is arranged continuously in the abdominal region F, the crotch region M and the dorsal region R.
As a result, the second standing portion 92 has an area that is stretchable in the longitudinal direction X at least at the free end where the elastic member 93 is arranged, and the free end including the elastic member 93 constitutes the third stretchable region A3 in this embodiment.

In this way, by forming the outer leakage prevention cuff 9 including the third stretchable region A3, when the diaper 1 is worn, the second standing portion 92 stands up from the second base end 91 as the standing base end toward the wearer's skin side due to the contractile force of the leakage prevention cuff forming elastic member 93, similar to the inner leakage prevention cuff 8. When the outer leakage prevention cuff 9 is in the standing state, the standing second standing portion 92 can effectively prevent leakage of excreted body fluid (excreted fluid) that has unintentionally moved outward in the width direction Y from the standing inner leakage prevention cuff 8 to the outside of the absorbent article. As a result, side leakage is effectively suppressed, particularly in the crotch region M.

As shown in FIG. 2, in the stretched state of the absorbent article (diaper 1), it is preferable that the elastic member 83 for forming the leakage cuffs constituting the second stretch zone A2 included in the inner leakage cuff 8 and the elastic member 93 for forming the outer leakage cuffs constituting the third stretch zone A3 included in the outer leakage cuff 9 are arranged so as not to cross each other. In this embodiment, in the stretched state of the diaper 1, the outer leakage cuffs 9 are positioned on both sides of the inner leakage cuff 8 in the width direction Y so that the two leakage cuffs 8, 9 do not overlap each other. With this configuration, the inner leakage cuff 8 and the outer leakage cuff 9 stand up independently of each other and are easily brought into close contact with the wearer's skin, thereby further improving the leakproofness of excreted liquid.

Unless otherwise specified, the various elastic members in the diaper 1, including the side elastic members 52, may be made of various known elastic materials commonly used in absorbent articles of this type, without any particular restrictions. Examples include synthetic rubbers such as styrene-butadiene, butadiene, isoprene, and neoprene, natural rubber, EVA, elastic polyolefins, and polyurethane. The preferred form of each elastic member is a thread (e.g., rubber thread) or band (e.g., flat rubber) having a rectangular, square, circular, or polygonal cross section, or a multifilament type thread.

The absorbent sheet 60 comprises two identical or different fiber sheets and water-absorbing polymer particles arranged between the fiber sheets. The absorbent sheet 60 contains less fiber material than the auxiliary layer 61, so it is thin and has sufficient liquid absorption performance despite its thinness. Therefore, the first stretchable region A1 allows the absorbent body standing portion 50 to stand up more reliably and prevents side leakage more reliably.

The fiber sheet constituting the absorbent sheet 60 is preferably a non-elastic sheet having liquid permeability or liquid absorbency. Examples of fibers constituting the fiber sheet include absorbent natural fibers such as wood pulp, such as softwood pulp and hardwood pulp, and non-wood pulp, such as cotton pulp and hemp pulp; and synthetic fibers containing resins, such as polyethylene and polypropylene. These may be used alone or in combination of two or more.
The fiber sheet may be in the form of, for example, paper, woven fabric, or nonwoven fabric. The fiber sheet typically has a single layer structure, but may have a laminate structure in which two or more types of fiber sheets are laminated together.

The auxiliary layer 61 is preferably a mixed stack containing at least absorbent natural fibers and absorbent polymers. The absorbent natural fibers may be, for example, the various pulp fibers described above.

The absorbent polymer used in the absorbent sheet 60 and the auxiliary layer 61 may be the same as those commonly used in this type of absorbent article. The absorbent polymer is typically based on a polymer or copolymer of acrylic acid or an alkali metal salt of acrylic acid. Examples include polyacrylic acid and its salts, and polymethacrylic acid and its salts.

The basis weight per fiber sheet constituting the absorbent sheet is preferably 4 g/m ² or more, more preferably 6 g/m ² or more, and preferably 50 g/m ² or less, more preferably 30 g/m ² or less.
In the absorbent sheet, the basis weight of the water-absorbent polymer is preferably 60 g/m ² or more, more preferably 100 g/m ² or more, and preferably 500 g/m ² or less, more preferably 400 g/m ² or less.
The overall basis weight of the auxiliary layer 61 is preferably 100 g/m ² or more, more preferably 200 g/m ² or more, and preferably 1200 g/m ² or less, more preferably 1000 g/m ² or less.

From the viewpoint of improving liquid absorption, the thickness of the absorbent sheet is preferably 0.3 mm or more, more preferably 0.6 mm or more. Furthermore, from the viewpoint of improving the user's experience when using the absorbent sheet or an absorbent article containing the sheet, the thickness of the absorbent sheet is preferably 4 mm or less, more preferably 3 mm or less, and even more preferably 2 mm or less. The above-mentioned thickness of the absorbent sheet is the thickness of the entire absorbent sheet measured under the application of a pressure of 1.7 kPa.

As described above, the diaper 1 has an exterior body 10 arranged on the non-skin-facing side of the absorbent core 6. In this embodiment, the exterior body 10 has a ventral exterior body 10F arranged in the ventral region F and a rear exterior body 10R arranged separately from the ventral exterior body 10F in the rear region R. When the diaper 1 is in the unfolded and stretched state shown in FIG. 2, the exterior body 10 has both ends in the longitudinal direction X corresponding to the rear region R that have a rectangular shape with a length in the width direction Y longer than in the longitudinal direction X, and is arranged such that at the center of the longitudinal direction X corresponding to the crotch region M, both sides along the longitudinal direction X of the center are curved.

The exterior body 10 is arranged relatively far from the absorbent body 5 and is composed of an outer layer sheet 11 that forms the outer surface of the diaper 1, and an inner layer sheet 12 that is arranged relatively close to the absorbent body 5 and forms the inner surface of the diaper 1. The two sheets 11, 12 are joined together and integrated by adhesive, fusion, etc.

In this embodiment, waist gathers are formed in the ventral region F and the back region R. The waist gathers are configured to include an outer body 10 and a plurality of elastic members 13 for forming waist gathers fixed to the outer body 10. The plurality of elastic members 13 each extend in the width direction Y and are arranged intermittently in the longitudinal direction X. The waist gathers are produced by fixing the elastic members 13 between the outer layer sheet 11 and the inner layer sheet 12 constituting the outer body 10 in a state in which they are stretched in the width direction Y, and then releasing the elastic members 13 from the stretched state. This allows the outer body 10 to exhibit stretchability in the width direction Y. When the diaper 1 is worn, the elastic members 13 contract to form the substantially continuous annular waist gathers around the entire circumference of the diaper 1.

In this embodiment, leg gathers are formed on the leg edges that form the opening edges of each of the pair of leg openings LH, LH. The leg gathers are configured to include an exterior body 10 and an elastic member 14 for forming leg gathers that is fixed to the exterior body 10. The elastic member 14 is arranged at least in the crotch region M, and preferably extends continuously in the longitudinal direction X from the crotch region M toward the ventral region F and the dorsal region R. The leg gathers are made by fixing the elastic member 14 in a stretched state between the outer layer sheet 11 and the inner layer sheet 12 that constitute the exterior body 10, and then releasing the elastic member 14 from the stretched state. When the diaper 1 is worn, the contraction of the elastic member 14 forms the leg gathers in a substantially continuous ring shape around the entire circumference of the opening edge of the leg opening LH. The elastic member 14 may be one or more.

The sheets 11 and 12 constituting the exterior body 10 may be the same type of sheet or different types of sheets. The sheets 11 and 12 may have elasticity, particularly elasticity in the width direction Y. As the sheets 11 and 12, nonwoven fabrics produced by various manufacturing methods can be used, and specific examples include single-layer nonwoven fabrics or laminated nonwoven fabrics of two or more layers, such as air-through nonwoven fabrics, heat-rolled nonwoven fabrics, spunlace nonwoven fabrics, spunbonded nonwoven fabrics, and meltblown nonwoven fabrics. The sheets 11 and 12 may also be composite sheets in which these nonwoven fabrics and films are laminated together.

Figure 4 shows a schematic cross-sectional view of the absorbent article (diaper 1) in a relaxed state. The relaxed state of the absorbent article (diaper 1) means a state in which no external force is being applied to the elastic members arranged in the absorbent article and the absorbent article is not stretched.

As shown in FIG. 4, when the diaper 1 is in a relaxed state, it is preferable that at least a part of the second standing portion 92 including the third elasticated region A3 is located further outward in the width direction Y than the first standing portion 82 including the second elasticated region A2, and it is more preferable that the second standing portion 92 including the third elasticated region A3 located in the crotch region M is located further outward in the width direction Y than the first standing portion 82 including the second elasticated region A2 located in the crotch region M. With this configuration, the inner leakage prevention cuff 8 and the outer leakage prevention cuff 9 each stand up independently and are more likely to come into contact with the wearer's skin at different positions, making it easier to block the outflow of excreted liquid in the width direction, further improving leakage prevention.

To configure at least a portion of the third elastic zone A3 to be located widthwise outward of the second elastic zone A2 in a plan view, for example, during the manufacturing process of the absorbent article, when the article is stretched, the elastic member 93 constituting the third elastic zone A3 is positioned widthwise outward of the position of the elastic member 83 constituting the second elastic zone A2, and the elastic members 83, 93 are positioned parallel to each other.

As shown in FIG. 4, when the diaper 1 is in a relaxed state, it is preferable that the inner leakage prevention cuff 8 and the outer leakage prevention cuff 9 are both erected, and in this erected state, a space B1 is formed between the inner leakage prevention cuff 8 and the outer leakage prevention cuff 9. The space B1 is formed at least between the inner leakage prevention cuff 8 and the outer leakage prevention cuff 9 in the crotch region M, and extends along the longitudinal direction X. With this configuration, excreted liquid that unintentionally leaks outward in the width direction Y beyond the erect inner leakage prevention cuff 8 can be retained in the space B1, thereby preventing the excreted liquid from leaking outside the absorbent article.

To form the space B1 between the inner leakproof cuff 8 and the outer leakproof cuff 9, for example, in the manufacturing process of the absorbent article, the inner leakproof cuff 8 and the outer leakproof cuff 9 are molded separately, and then the outer leakproof cuff 9 is laminated on the outer surface of the inner leakproof cuff 8 and joined at the longitudinal center of each cuff, but not joined at both longitudinal sides.

As shown in FIG. 4, in the relaxed state of the diaper 1, it is also preferable that the absorbent body standing parts 50 located on both sides in the width direction of the absorbent body 5 and the inner leakage prevention cuffs 8 both stand up, and in this standing state, a second space B2 is formed between the absorbent body 5 and the inner leakage prevention cuffs 8. The second space B2 is formed at least between the absorbent body 5 and the inner leakage prevention cuffs 8 in the crotch region M, and extends along the longitudinal direction X. With this configuration, even if the excreted liquid that comes into contact with the skin-facing surface of the absorbent body 5 flows out in the width direction Y, the excreted liquid is retained in the second space B2, and the excreted liquid retained in the second space B2 can be absorbed from the non-skin-facing surface side of the absorbent body 5 (the absorbent body standing parts 50), so that the excreted liquid can be effectively prevented from leaking outside the absorbent article.

The second space B2 can be formed between the absorbent body 5 and the inner leakproof cuff 8, for example, by using a side elastic member 52 with a higher stretch ratio than the elastic member 83 in the inner leakproof cuff 8, and by ensuring that the absorbent body standing portion 50 and the first standing portion 82 are not joined to each other.

As described above, the inner leakproof cuff 8 has a first base end 81 which is an upright end, and a second stretchable region A2 which is a free end of the first upright portion 82. It is preferable that the second stretchable region A2, specifically the free end of the first upright portion 82 including the elastic member 83, is formed so as to protrude outward in the width direction Y when the absorbent article is in a relaxed state. This configuration allows the second stretchable region A2 of the inner leakproof cuff 8 to be in surface contact with the wearer's skin, thereby improving the adhesion of the leakproof cuff and more effectively reducing leakage of excreted fluid.

As shown in FIG. 4 , the inner leakproof cuff 8 is folded outward at a folding portion 8f extending along the longitudinal direction X between the first base end 81 and the free end of the first standing portion 82, and is divided into a lower region 8b located on the first base end 81 side and an upper region 8u located on the free end side of the first standing portion 82.
When the diaper 1 is in a relaxed state, at least in a plan view of the crotch region, the inner leakage preventing cuffs 8 folded at the folding portions 8f are located inward in the width direction Y from the free ends of the first standing portions 82. Thus, when the diaper 1 is in a relaxed state, the inner leakage preventing cuffs 8 are bent at the folding portions 8f, and the free ends of the first standing portions 82 protrude outward in the width direction. In this embodiment, the inner leakage preventing cuffs 8 are also bent at the positions where the elastic members 84 are disposed. The lower region 8b and the upper region 8u both extend along the longitudinal direction X, and are both substantially rectangular in plan view.

When the absorbent core 6 includes the absorbent sheet 60, it is preferable that, in the relaxed state of the absorbent article, the free end of the inner leakage preventing cuff 8 constituting the second elasticated region A2 is positioned on the side region in the width direction Y of the absorbent sheet 60. With such a configuration, leakage of excreted liquid in the width direction is efficiently prevented, resulting in an absorbent article with superior leakage prevention properties.
In order to position the free end of the inner leakage preventing cuff 8 on the side region in the width direction Y of the absorbent sheet 60, for example, in the manufacturing process of the absorbent article, the elastic member 83 is arranged in a stretched state while folding the leakage preventing cuff-forming sheet 80 of the inner leakage preventing cuff 8 so as to form the lower region 8b and the upper region 8u. In addition, this can be achieved by adopting a configuration in which standing inhibition parts 88 for inhibiting the standing of the leakage preventing cuff-forming sheet 80 are formed at both ends in the longitudinal direction X of the inner leakage preventing cuff 8, and the sheet 80 is fixed to the absorbent sheet or attached to the absorbent body.

The outer leakproof cuff 9, like the inner leakproof cuff 8, has a second base end 91 which is an upright end, and a third stretchable region A3 which is a free end of the second upright portion 92, and it is preferable that the third stretchable region A3, specifically the free end of the second upright portion 92 including the elastic member 93, is formed so as to protrude outward in the width direction Y when the absorbent article is in a relaxed state. With this configuration, the third stretchable region A3 of the outer leakproof cuff 9 can be brought into surface contact with the wearer's skin, improving the adhesion of the leakproof cuff and more effectively reducing the leakage of excreted fluid that has unintentionally flowed out from the inner leakproof cuff 8.

As shown in FIG. 4 , the outer leakproof cuff 9 is folded outward at a second folding portion 9f extending along the longitudinal direction X between the second base end 91 and the free end of the second standing portion 92, and is divided into a second lower region 9b located on the second base end 91 side and a second upper region 9u located on the free end side of the second standing portion 92.
When the diaper 1 is in a relaxed state, at least in the crotch region, the outer leakage preventing cuffs 9 folded at the second folds 9f are located inward in the width direction Y from the free ends of the second standing portions 92. Thus, when the diaper 1 is in a relaxed state, the outer leakage preventing cuffs 9 are bent at the second folds 9f, and the free ends of the second standing portions 92 protrude outward in the width direction. The second lower region 9b and the second upper region 9u both extend along the longitudinal direction X, and are both substantially rectangular in plan view.

In the relaxed state of the diaper 1, the relationship between the degree of rise of the absorbent body standing portion 50 including the first stretchable region A1 and the inner leakage prevention cuff 8 including the second stretchable region A2 is preferably configured so that the inner leakage prevention cuff 8 including the second stretchable region A2 rises higher than the absorbent body standing portion 50 including the first stretchable region A1, as shown in FIG. 4. With this configuration, the absorbent body 5 is aligned with the wearer's excretory part and its vicinity, thereby improving liquid absorption and preventing liquid diffusion in the width direction. In addition, the inner leakage prevention cuff 8 is sufficiently in close contact with the wearer, and excreted liquid unintentionally diffused in the width direction Y can be efficiently blocked by the inner leakage prevention cuff 8 and absorbed by the absorbent body 5, thereby further improving the leakage prevention in the width direction.

To make the second elasticated zone A2 stand up higher than the first elasticated zone A1, for example, the nonwoven fabric (leakproof cuff forming sheet 80) constituting the second elasticated zone A2 may be extended outward beyond the widthwise end of the first elasticated zone A1, or an elastic member in the second elasticated zone A2 may be used whose elongation ratio is higher than that of the first elasticated zone.

As for the relationship between the degree of rise of the inner leakage prevention cuff 8 including the second elasticated region A2 and the outer leakage prevention cuff 9 including the third elasticated region A3 in the relaxed state of the diaper 1, as shown in FIG. 4, it is preferable that the inner leakage prevention cuff 8 including the second elasticated region A2 is configured to rise higher in the vertical direction than the outer leakage prevention cuff 9 including the third elasticated region A3. With such a configuration, the inner leakage prevention cuff 8 can be sufficiently attached to the wearer to effectively prevent the outflow of excreted liquid in the width direction Y, and the outer leakage prevention cuff 9 can stop excreted liquid that has unintentionally flowed beyond the inner leakage prevention cuff 8, thereby further improving the leakage prevention of liquid in the width direction. In particular, by adopting a configuration in which the second elasticated region A2 is raised higher than the third elasticated region A3 in combination with the above-mentioned configuration in which the second elasticated region A2 is raised higher in the vertical direction than the first elasticated region A1, it is advantageous in that the leakage prevention of liquid in the width direction can be further improved.

To make the second stretch zone A2 stand up higher than the third stretch zone A3, for example, the stretch ratio of the elastic member in the second stretch zone A2 may be made higher than the stretch ratio of the elastic member in the third stretch zone, or the length of the elastic member 83 that constitutes the second stretch zone A2 along the longitudinal direction may be made longer than the length of the elastic member 93 that constitutes the third stretch zone A3 along the longitudinal direction.

When the diaper 1 is in a relaxed state, the relationship between the degree of rise of the absorbent body standing portion 50 including the first elasticated region A1 and the outer leakproof cuff 9 including the third elasticated region A3 may be configured so that the first elasticated region A1 stands vertically higher than the third elasticated region A3, or the third elasticated region A3 stands vertically higher than the first elasticated region A1.

In this specification, the vertical height of each of the stretchable regions A1, A2, and A3 is a value measured by the following method. Specifically, the diaper 1 in a relaxed state is placed on a horizontal table with the skin-facing side facing up, and the vertical distance from the horizontal table to the free end of the leak-proof cuff in each of the stretchable regions A1, A2, and A3 is compared visually or by a known measurement method.

When viewed in a plan view with the diaper 1 unfolded and in a maximum stretched state, the absorbent core 6 preferably has a bend induction portion 68 extending along the longitudinal direction X, located inward in the width direction Y from the first stretch zone A1. The absorbent core 6 is preferably formed so that the portion between the first stretch zone A1 and the bend induction portion 68 stands up. This reduces the movement of excreted liquid in the width direction, further improving the liquid absorption performance.

The bend induction section 68 is a section that functions as a flexible axis when the widthwise side of the absorbent core 6 rises toward the wearer's skin when the diaper is in a relaxed state, and is the same part as the rising starting point. The bend induction section 68 acts as a flexible axis, and the absorbent core 6 rises due to contraction of the side elastic members 52 arranged in the first stretch zone A1.

The bend induction portion 68, i.e., the rising start point of the absorbent core 6, may be a portion where a stiffness difference or density difference occurs in the absorbent core 6, as shown in the embodiment shown in Fig. 4. Examples of such bend induction portions 68 include positions on both sides in the width direction of the auxiliary layer 61, which is configured to have a shorter width direction length than the absorbent sheet 60, in the absorbent core 6 including the absorbent sheet 60 and the auxiliary layer 61. Another example is a low basis weight portion 65 in the auxiliary layer 61. Alternatively, when the non-skin facing surface of the absorbent body 5 including the absorbent core 6 and another member (e.g., the exterior body 10) arranged opposite to the non-skin facing surface are partially joined with an adhesive or the like around the non-standing portion 51, the boundary between the joined portion and the non-joined portion may be included.
In either case, the bend induction portion 68 can serve as a rising starting point for the absorber rising portion 50 .

The inner leakage preventing cuff 8 is configured to include a pair of opposing leakage preventing cuff-forming sheets 80 made of nonwoven fabric or the like and elastic members 83, 84 disposed therebetween, and preferably further includes a liquid-impermeable film 85 between the leakage preventing cuff-forming sheets 80 as shown in Figures 3 and 4. By further including a film, seepage of urine or feces to the outside of the article is suppressed, and side leakage can be further reduced.
Examples of the material of the film 85 include resin films made of olefin resins such as polyethylene and polypropylene. The resin film may be moisture-permeable. Examples of the moisture-permeable resin film include porous resin films obtained by kneading an inorganic filler into an olefin resin such as polyethylene or polypropylene to form a sheet-like material, and then stretching the material in a uniaxial or biaxial direction.

The diaper 1 having the preferred embodiment described above is advantageous in that it can further improve the fit of the absorbent article when worn, making the diaper comfortable to use, while further improving the leak-proofing of excreted liquid. This will be explained using FIG. 5, which shows a schematic arrangement of the diaper 1 in the crotch area when worn.

5, when the diaper 1 is worn, the absorbent body 5 having the first elasticated region A1 has an absorbent body standing portion 50 including the first elasticated region A1 standing up toward the wearer's skin due to contraction of the side elastic members 52, covering the excretory part P1 of the wearer and its vicinity. This allows excretory liquid such as urine excreted from the excretory part to come into contact with the skin-facing surface of the absorbent body 5 and be absorbed, preventing lateral leakage of the excreted liquid.
If the excreted liquid moves in the diaper width direction Y due to the wearer's movement or change in posture, the excreted liquid is stopped by the inner leakproof cuff 8 that stands toward the wearer's skin, while the excreted liquid is absorbed from the skin-facing or non-skin-facing surface of the absorbent standing portion 50.

When the diaper is worn, as shown in FIG. 5, the second stretchable region A2 of the inner leakproof cuff 8, i.e., the free end of the first standing portion 82, is bent outward in the width direction in a plan view and comes into contact with the groin P2 at the base of the leg and its vicinity. The groin is recessed and has a greater difference in unevenness compared to the leg circumference, so the outer leakproof cuff 9 and the sheet 90 constituting it support the inner leakproof cuff 8 from the outside, raising the inner leakproof cuff 8 high and making surface contact, thereby increasing the adhesion of the inner leakproof cuff 8 to the groin and its vicinity. As a result, it is possible to efficiently prevent excreted liquid that has moved in the width direction from leaking from the groin, and to increase the efficiency with which the absorbent 5 absorbs excreted liquid.

Furthermore, even if the excreted liquid unintentionally flows out in the width direction Y beyond the inner leakage prevention cuff 8 due to further changes in the wearer's movement or posture, the excreted liquid is held back by the outer leakage prevention cuff 9, which is positioned outward of the inner leakage prevention cuff 8 in the width direction Y and stands up toward the wearer's skin, while the excreted liquid is retained in the space B1 formed between the inner leakage prevention cuff 8 and the outer leakage prevention cuff 9. When the diaper is worn, as shown in the figure, the third stretchable region A3 in the outer leakage prevention cuff 9, i.e., the free end of the second standing portion 92, is bent outward and comes into contact with the thigh P3. As a result, leakage of the excreted liquid to the outside of the absorbent article is effectively prevented, resulting in an absorbent article with excellent leak-proofing of excreted liquid.

Below, a preferred embodiment of an absorbent sheet 60 comprising two identical or different fibrous sheets and water-absorbent polymer particles disposed between the two fibrous sheets will be described with reference to Figures 6 and 7.

When the absorbent body 5 is provided with an absorbent sheet 60, the absorbent sheet 60 is preferably made of a first fiber sheet 2a and a second fiber sheet 2b bonded together by an adhesive 2e. This configuration increases the adhesive strength between the two fiber sheets 2a, 2b to increase the strength of the absorbent sheet 60, while reducing polymer shedding and increasing liquid absorption. The adhesive 2e shown in Figures 6 and 7 is disposed on the surface of each fiber sheet 2a, 2b facing the water-absorbent polymer 2c. The outer surfaces of the first fiber sheet 2a and the second fiber sheet 2b shown in the figures are both free of adhesive 2e and other materials.

When the two fibrous sheets 2a, 2b are bonded to each other by the adhesive 2e, it is preferable that the first fibrous sheet 2a and the second fibrous sheet 2b have a portion 2f where the first fibrous sheet 2a and the second fibrous sheet 2b are bonded directly to each other by the adhesive 2e without the water-absorbent polymer 2c (hereinafter, this is also simply referred to as the "directly bonded portion") and a portion 2g where the first fibrous sheet 2a and the second fibrous sheet 2b are bonded to each other by the adhesive 2e via the water-absorbent polymer 2c (hereinafter, this is also referred to as the "indirectly bonded portion"). With this configuration, the water-absorbent polymer 2c is held in a predetermined position on the absorbent sheet 60, which further reduces unintended movement or uneven distribution of the water-absorbent polymer 2c and further enhances the liquid absorbency of the absorbent sheet 60.

The direct bonded areas 2f shown in Figures 6 and 7 are formed in the gaps between the particles of the water-absorbent polymer 2c in the area where the water-absorbent polymer 2c is arranged. When viewed in cross section in the sheet thickness direction, the direct bonded areas 2f are formed by the adhesive 2e in a columnar shape that directly bonds the two fiber sheets 2a, 2b together. Also, as shown in Figures 6 and 7, when the absorbent sheet 60 is viewed in the sheet planar direction, multiple direct bonded areas 2f are formed in a regular or irregular scattered pattern.

As shown in Figures 6 and 7, the indirectly bonded area 2g is an area where the area where the adhesive 2e is applied on the first fiber sheet 2a, the area where the water-absorbent polymer 2c is present, and the area where the adhesive 2e is applied on the second fiber sheet 2b overlap in the thickness direction when the absorbent sheet 60 is viewed in cross section.

As the adhesive 2e, it is preferable to use one having flexibility that can expand in accordance with the swelling change accompanying the liquid absorption of the water-absorbing polymer 2c. Examples of such raw materials include acrylic adhesives containing one or more vinyl monomer (co)polymers (such as ethylene-vinyl acetate copolymers) including 2-ethylhexyl acrylate, butyl acrylate, ethyl acrylate, cyanoacrylate, vinyl acetate, methyl methacrylate, etc., silicone adhesives containing polydimethylsiloxane polymers, etc., as well as natural rubber adhesives containing natural rubber, isoprene adhesives containing one or more polyisoprene, chloroprene, etc., rubber adhesives such as styrene-butadiene copolymers (SBR), styrene-isoprene-styrene block copolymers (SIS), styrene-butadiene-styrene block copolymers (SBS), styrene-ethylene-butadiene-styrene block copolymers (SEBS), and styrene-ethylene-propylene-styrene block copolymers (SEPS). These may be used alone or in combination of two or more. As shown in Figures 6 and 7, when an adhesive 2e is arranged on the surface of each of the fiber sheets 2a, 2b facing the water-absorbent polymer 2c, the adhesive arranged on the first fiber sheet 2a and the adhesive arranged on the second fiber sheet 2b may be the same type or different types.
Of these, from the viewpoint of excellent flexibility and elasticity and enhancing the retention of the water-absorbent polymer, it is preferable that the adhesive 2e is a hot melt adhesive, and it is more preferable to use a rubber-based adhesive, and among the rubber-based adhesives, it is even more preferable to use a styrene-based adhesive.

As shown in Figs. 6 and 7, it is preferable that adhesive 2e is applied to both the surface of the first fiber sheet 2a facing the water-absorbent polymer 2c and the surface of the second fiber sheet 2b facing the water-absorbent polymer 2c. In this case, it is also preferable that the application area of adhesive 2e on the second fiber sheet 2b is larger than the application area of adhesive 2e on the first fiber sheet 2a. With this configuration, the water-absorbent polymer 2c is uniformly held on the second fiber sheet 2b, which has a larger application area of adhesive 2e than the first fiber sheet 2a, and unintended movement or falling off of the water-absorbent polymer 2c is suppressed, and liquid permeability from the first fiber sheet 2a, which has a smaller application area of adhesive 2e than the second fiber sheet 2b, is ensured, and liquid absorbency can be further improved.

In order to make the application area of adhesive 2e on each fiber sheet different from each other, for example, adhesive 2e may be applied discontinuously to the first fiber sheet 2a so as to have non-applied areas, and adhesive 2e may be applied continuously to the entire area of one side of the second fiber sheet 2b.

It is preferable that the first fiber sheet 2a and the second fiber sheet 2b are configured so that their Klemm water absorption heights are different. In detail, when the Klemm water absorption height is measured based on the measurement method described below, the Klemm water absorption height of the first fiber sheet 2a is higher than that of the second fiber sheet 2b. By each fiber sheet having such physical properties, the first fiber sheet 2a side can improve the liquid diffusion in the sheet surface direction, and the diffused liquid can be brought into contact with each absorbent polymer 2c, thereby improving the utilization efficiency of each absorbent polymer 2c. As a result, the liquid absorption can be improved. In addition, the second fiber sheet 2b side has a lower liquid retention property than the first fiber sheet 2a, so that the breathability is improved.

In order to make the above-mentioned effects more pronounced, the Klemm water absorption height C1 of the first fiber sheet 2a is preferably 10 mm or more, more preferably 20 mm or more, even more preferably 25 mm or more, and even more preferably 30 mm or more, and realistically 60 mm or less.
From a similar viewpoint, the Klemm water absorption height C2 of the second fiber sheet 2b is preferably 30 mm or less, more preferably 20 mm or less, and further preferably 10 mm or less, provided that C1>C2, and is realistically 1 mm or more.
The Klemm water absorption height can be measured, for example, in accordance with the test method of JIS P8141.

The absorbent article of the present invention is not limited to the pants-type disposable diaper shown in the above embodiment, but broadly includes articles used to absorb body fluids excreted from the human body (urine, menstrual blood, loose stool, sweat, etc.), including flat-type disposable diapers, sanitary napkins, sanitary shorts, etc., that have so-called fastening tapes.

In the above-described embodiment of the diaper 1, the exterior body 10 is formed separately into a ventral exterior body and a dorsal exterior body. Alternatively, the exterior body 10 may extend continuously from the ventral region F to the dorsal region R.

The present invention has been described above based on its embodiments, but the present invention is not limited to the above embodiments and can be modified as appropriate. Furthermore, all of the above-mentioned embodiments can be used in combination with each other as appropriate.

In addition to the above-described embodiment, the following absorbent article is disclosed.

＜1＞
An absorbent article having a longitudinal direction corresponding to the front-to-rear direction of a wearer and a width direction perpendicular thereto, the article comprising: an inner leakproof cuff having a first stretchable region located at a side edge along the longitudinal direction of an absorbent core and stretchable in the longitudinal direction; a second stretchable region extending along the longitudinal direction and stretchable in the longitudinal direction; and an outer leakproof cuff having a third stretchable region extending along the longitudinal direction and stretchable in the longitudinal direction, the inner leakproof cuff being provided separately from the outer leakproof cuff;
Each of the stretchable regions is configured by disposing an elastic member extending along the longitudinal direction in a stretched state between a pair of opposing nonwoven fabrics,
The elasticated zones are formed so as to be parallel to each other in a plan view when the absorbent article is in an unfolded and maximum extended state.

＜2＞
The absorbent article according to <1> above, wherein, in a relaxed state of the absorbent article, at least a portion of the third elasticated zone is located widthwise outboard of the second elasticated zone in a plan view.
＜3＞
The absorbent article has a ventral region that is disposed on the ventral side when the absorbent article is worn, a dorsal region that is disposed on the dorsal side of a wearer, and a crotch region that is located between the ventral region and the dorsal region,
The absorbent article according to <1> or <2>, wherein in a relaxed state of the absorbent article, the third elasticated zone located in the crotch region is located widthwise outward from the second elasticated zone in a plan view.
＜4＞
The absorbent article described in any one of <1> to <3>, wherein in a relaxed state of the absorbent article, the inner leakproof cuffs and the outer leakproof cuffs are erected, and a space defined by these leakproof cuffs is formed between these leakproof cuffs.
＜5＞
The absorbent core further includes an outer casing disposed on a non-skin facing side thereof,
The exterior body includes a ventral exterior body disposed in the ventral region and a dorsal exterior body disposed in the dorsal region,
The absorbent article according to any one of <1> to <4>, wherein the absorbent body having the absorbent core is arranged so as to span between the ventral exterior body and the dorsal exterior body.

＜6＞
The absorbent article according to any one of <1> to <5>, wherein the absorbent core is composed of at least one of a stack of absorbent natural fibers, a mixed stack containing absorbent natural fibers and an absorbent polymer, and/or an absorbent sheet having two identical or different fiber sheets and particles of absorbent polymer disposed between the fiber sheets.
＜７＞
The absorbent core comprises an absorbent sheet having two identical or different fibrous sheets and particles of a water-absorbing polymer disposed between the fibrous sheets;
A laminated structure including an auxiliary layer disposed adjacent to the skin-facing surface of the absorbent sheet,
The absorbent article according to any one of <1> to <6>, wherein the auxiliary layer is a mixed stack containing at least absorbent natural fibers and absorbent polymers.
＜8＞
The absorbent article according to <7> above, wherein the side regions of the absorbent sheet extend outward in the width direction beyond the side edges of the auxiliary layer in a plan view.
＜9＞
the inner leakproof cuff has a base end portion which is a standing end of the inner leakproof cuff, a second stretchable region which is a free end portion, and a bent portion which is located between the base end portion and the free end portion and extends in a longitudinal direction,
The absorbent article according to any one of <1> to <8>, wherein, in a relaxed state and in a plan view of the absorbent article, the second elasticated zone is configured to protrude outward in the width direction at the folded portion.

＜10＞
The absorbent core comprises an absorbent sheet having two identical or different fibrous sheets and particles of a water-absorbing polymer disposed between the fibrous sheets;
A laminated structure including an auxiliary layer disposed adjacent to the skin-facing surface of the absorbent sheet,
The auxiliary layer is a mixed stack containing at least a water-absorbent natural fiber and a water-absorbent polymer,
The side regions of the absorbent sheet extend outward in the width direction beyond the side edges of the auxiliary layer in a plan view,
The absorbent article according to <9>, wherein, in a relaxed state of the absorbent article, the second elasticated zone is located on the side zone of the absorbent sheet in a plan view.
<11>
The absorbent article according to any one of <1> to <10>, wherein the inner leakage preventing cuff further includes a liquid-impermeable film disposed between the pair of opposing nonwoven fabrics.
＜12＞
The absorbent core has a bend induction portion extending along the longitudinal direction at a position inward in the width direction from the first elasticated region in a plan view in an unfolded and maximum stretched state,
The absorbent article according to any one of <1> to <11> , wherein in a relaxed state of the absorbent article, the absorbent core is configured to stand between the first stretch zone and the bend induction portion.

＜13＞
The absorbent article according to any one of <1> to <12>, wherein, in a relaxed state of the absorbent article, the second elasticated zone stands up higher in the vertical direction than the first elasticated zone.
＜14＞
The absorbent article according to any one of <1> to <13>, wherein, in a relaxed state of the absorbent article, the second elasticated zone stands up higher in the vertical direction than the third elasticated zone.
＜15＞
The absorbent article according to any one of <1> to <14>, wherein, in a plan view in a spread and maximum stretched state of the absorbent article, the elastic member constituting the second stretchable region and the elastic member constituting the third stretchable region are in a non-intersecting state.

＜16＞
A surface sheet is disposed on the skin-facing surface of the absorbent body having the absorbent core, the surface sheet covering the skin-facing surface being disposed on the skin-facing surface,
The absorbent article according to any one of <1> to <15>, wherein the top sheet is a top sheet having an uneven shape formed on a surface thereof including a plurality of convex portions and concave portions located around the convex portions.
＜１７＞
The absorbent article described in <16>, wherein the top sheet traverses the skin-facing side of the absorbent body in the width direction, and the extensions from both side portions of the top sheet along the longitudinal direction of the absorbent body are wrapped around the non-skin-facing side of the absorbent body.
＜18＞
The inner leakproof cuff has a base end which becomes an upstanding end of the inner leakproof cuff,
The absorbent article according to <17>, wherein the extension portion of the top sheet is fixed at the base end between the absorbent body and a sheet for forming the inner leakproof cuff.

＜19＞
The absorbent article according to <17> or <18>, wherein the top sheet does not cover the entire non-skin facing surface of the absorbent body.
＜20＞
The absorbent article according to <19>, wherein the topsheet does not cover a central portion in a width direction of the non-skin facing surface of the absorbent body.
＜21＞
The absorbent article according to any one of <17> to <20>, wherein the top sheet covers the entire skin-facing surface of the absorbent body and the entire both side portions along the longitudinal direction of the absorbent body, and covers a predetermined range of an area extending inward in the width direction from the both side portions on the non-skin-facing surface of the absorbent body.

＜22＞
The absorbent article has a ventral region that is disposed on the ventral side when the absorbent article is worn, a dorsal region that is disposed on the dorsal side of a wearer, and a crotch region that is located between the ventral region and the dorsal region,
The absorbent core comprises an absorbent sheet having two identical or different fibrous sheets and particles of a water-absorbing polymer disposed between the fibrous sheets;
A laminated structure including an auxiliary layer disposed adjacent to the skin-facing surface of the absorbent sheet,
the absorbent sheet has a rectangular shape in a plan view, and is disposed over the entirety of the abdominal region, the crotch region, and the back region with a longitudinal direction of the absorbent sheet aligned with a longitudinal direction of the absorbent article;
The absorbent article described in any one of <1> to <21>, wherein the auxiliary layer has a shape smaller than the planar area of the absorbent sheet, and has a portion in which the width direction length increases continuously or stepwise when the auxiliary layer is viewed from the dorsal region toward the ventral region.
＜23＞
The absorbent article has a ventral region that is disposed on the ventral side when the absorbent article is worn, a dorsal region that is disposed on the dorsal side of a wearer, and a crotch region that is located between the ventral region and the dorsal region,
The absorbent article according to any one of <1> to <22>, wherein the elastic member is disposed at least in the crotch region.
＜24＞
The absorbent article described in <23>, wherein both ends of the elastic member extend to both ends of the absorbent core in the longitudinal direction and are continuously arranged in the abdominal region, the crotch region and the back region.

＜25＞
The absorbent article according to any one of <1> to <24>, wherein at least both ends of the elastic member are fixed to an absorbent body including at least the absorbent core.
＜26＞
The inner leakage preventing cuff has a base end portion which is a standing end of the inner leakage preventing cuff and a standing portion which stands on the wearer side,
The standing portion is configured to include a second stretchable region that is a free end portion extending in a longitudinal direction and capable of stretching in the longitudinal direction,
A first elastic member is disposed in the second elastic region in a stretched state so as to extend along a longitudinal direction,
The absorbent article according to any one of <1> to <25>, wherein a second elastic member is arranged in a stretched state so as to extend along the longitudinal direction at an intermediate position between the second elasticated region and the base end.

＜27＞
The absorbent article described in <26>, wherein the first elastic member and the second elastic member are folded in half along the longitudinal direction and fixed between opposing sheets for forming the inner leakproof cuff.
＜28＞
The absorbent article has a ventral region that is disposed on the ventral side when the absorbent article is worn, a dorsal region that is disposed on the dorsal side of a wearer, and a crotch region that is located between the ventral region and the dorsal region,
The absorbent article described in <26> or <27>, wherein the first elastic member and the second elastic member each independently extend to both longitudinal ends of the inner leakproof cuff and are continuously arranged in the abdominal region, the crotch region and the back region.

＜29＞
The outer leakproof cuff has an upstanding portion that stands on the wearer side,
The standing portion includes a third stretchable region that extends in the longitudinal direction and constitutes a free end portion that is stretchable in the longitudinal direction,
The absorbent article according to any one of <1> to <28>, wherein an elastic member is arranged in the third elasticated region in a stretched state so as to extend along the longitudinal direction.
＜30＞
The absorbent article according to <29>, wherein the elastic member is folded in half along the longitudinal direction and fixed between the opposing forming sheets of the outer leakage preventing cuffs.
＜31＞
The absorbent article has a ventral region that is disposed on the ventral side when the absorbent article is worn, a dorsal region that is disposed on the dorsal side of a wearer, and a crotch region that is located between the ventral region and the dorsal region,
The absorbent article according to <29> or <30>, wherein one end of the elastic member is located in the ventral region and the other end is located in the dorsal region, and the elastic member is continuously arranged in the ventral region, the crotch region and the dorsal region.

＜32＞
The absorbent core comprises an absorbent sheet having two identical or different fibrous sheets and particles of a water-absorbing polymer disposed between the fibrous sheets;
A laminated structure including an auxiliary layer disposed adjacent to the skin-facing surface of the absorbent sheet,
The auxiliary layer has a low basis weight portion in which the basis weight of the constituent material is less than that of other regions or in which the constituent material is not present,
The absorbent article according to any one of <1> to <31>, wherein the low basis weight portion penetrates the auxiliary layer in a thickness direction and extends in a longitudinal direction.
＜33＞
The absorbent article according to <32> above, wherein the low basis weight portion is a groove having no bottom.
＜34＞
The absorbent article has a ventral region that is disposed on the ventral side when the absorbent article is worn, a dorsal region that is disposed on the dorsal side of a wearer, and a crotch region that is located between the ventral region and the dorsal region,
The absorbent article according to <32> or <33>, wherein the low basis weight portions have a rectangular shape extending along the longitudinal direction and are arranged intermittently in the width direction in a region including the crotch region.

＜35＞
The absorbent article according to any one of <1> to <34>, wherein the inner leakproof cuff has, at both ends in the longitudinal direction, a standing-inhibiting portion where the sheet for forming the inner leakproof cuff is inhibited from standing up.
＜36＞
The absorbent article has a ventral region that is disposed on the ventral side when the absorbent article is worn, a dorsal region that is disposed on the dorsal side of a wearer, and a crotch region that is located between the ventral region and the dorsal region,
The standing inhibition portion is formed in a pair in each of the ventral region and the dorsal region,
The absorbent article according to <35>, wherein the upright inhibition portion is formed by fixing a sheet for forming the inner leakage prevention cuff to a skin-facing surface of an absorbent body including the absorbent core.
＜３７＞
The inner leakproof cuff has an upstanding portion that stands on the wearer side,
The absorbent article according to <35> or <36>, wherein a portion of the inner leakage preventing cuff along the longitudinal direction sandwiched between the upright inhibition portions is the upright portion.

＜３８＞
The absorbent core comprises an absorbent sheet having two identical or different fibrous sheets and particles of a water-absorbing polymer disposed between the fibrous sheets;
A laminated structure including an auxiliary layer disposed adjacent to the skin-facing surface of the absorbent sheet,
The auxiliary layer is a mixed stack containing at least a water-absorbent natural fiber and a water-absorbent polymer,
The absorbent natural fiber is pulp fiber,
The absorbent article according to any one of <1> to <37>, wherein the absorbent polymer used in the absorbent sheet and the auxiliary layer is a polymer or copolymer of acrylic acid or an alkali metal salt of acrylic acid.
＜３９＞
The absorbent article according to <38>, wherein the basis weight per sheet of the fiber sheet constituting the absorbent sheet is preferably 4 g/m2 or ^more , more preferably 6 g/m2 or ^more , and preferably 50 g/ ^m2 or less, more preferably 30 g/ ^m2 or less.

＜40＞
In the absorbent sheet, the basis weight of the water-absorbent polymer is preferably 60 g/m ² or more, more preferably 100 g/m ² or more, and preferably 500 g/m ² or less, more preferably 400 g/m ² or less. The absorbent article according to <38> or <39>.
＜41＞
The absorbent article according to any one of <38> to <40>, wherein the total basis weight of the auxiliary layer is preferably 100 g/ ^m2 or more, more preferably 200 g/ ^m2 or ^more , and preferably 1200 g/ ^m2 or less, more preferably 1000 g/m2 or less.
＜42＞
The absorbent article according to any one of <38> to <41>, wherein the thickness of the absorbent sheet is preferably 0.3 mm or more, more preferably 0.6 mm or more, and preferably 4 mm or less, more preferably 3 mm or less, and even more preferably 2 mm or less.

＜43＞
The absorbent core further includes an outer casing disposed on a non-skin facing side thereof,
The absorbent article according to any one of <1> to <42>, further comprising a waist gather that includes the outer body and a plurality of elastic members that extend in the width direction of the outer body and are intermittently arranged in the longitudinal direction.
＜44＞
The absorbent article has a ventral region that is disposed on the ventral side when the absorbent article is worn, a dorsal region that is disposed on the dorsal side of a wearer, and a crotch region that is located between the ventral region and the dorsal region,
The absorbent article according to <43>, wherein the waist gathers are formed in the ventral region and the back region.
＜45＞
The absorbent article has a ventral region that is disposed on the ventral side when the absorbent article is worn, a dorsal region that is disposed on the dorsal side of a wearer, and a crotch region that is located between the ventral region and the dorsal region,
The absorbent core further includes an outer casing disposed on a non-skin facing side thereof,
The absorbent article according to any one of <1> to <44>, further comprising leg gathers including the exterior body and an elastic member extending in the longitudinal direction through the crotch region.

＜46＞
The absorbent body having the absorbent core has an absorbent sheet having two identical or different fibrous sheets and particles of a water-absorbing polymer disposed between the fibrous sheets,
The absorbent article according to any one of <1> to <45>, wherein the absorbent sheet is formed by bonding the two fibrous sheets to each other with an adhesive.
＜47＞
The absorbent article according to <46>, wherein the adhesive is disposed on each of the two fiber sheets on a surface facing the water-absorbent polymer.
＜48＞
The absorbent article according to <47>, wherein an area of the adhesive applied to one of the two fibrous sheets is larger than an area of the adhesive applied to the other fibrous sheet.

＜49＞
The absorbent article according to any one of <46> to <48>, wherein the two fiber sheets have a portion where they are directly bonded to each other by the adhesive without using the water-absorbent polymer, and a portion where they are bonded to each other by the adhesive via the water-absorbent polymer.
＜50＞
The absorbent article according to any one of <46> to <49>, wherein a rubber-based adhesive is used as the adhesive.
＜51＞
The absorbent article according to <50> above, wherein the rubber-based adhesive is a styrene-based adhesive.
＜52＞
The absorbent article according to any one of <46> to <51>, wherein the adhesive is a hot melt adhesive.

1. Pants-type disposable diapers (absorbent articles)
2 Absorbent body 3 Top sheet 4 Back sheet 5 Absorbent body 6 Absorbent core 60 Absorbent sheet 61 Auxiliary layer 8 Inner leakproof cuff 9 Outer leakproof cuff 10 Outer body A1 First stretchable region A2 Second stretchable region A3 Third stretchable region X Longitudinal direction Y Width direction F Abdominal region M Crotch region R Dorsal region

Claims (11)

An absorbent article having a longitudinal direction corresponding to the front-rear direction of a wearer and a width direction perpendicular to the longitudinal direction, the article comprising an absorbent body and an exterior body disposed on a non-skin-facing side of the absorbent body,
The absorbent body is configured to include a top sheet arranged relatively close to the wearer's skin, a back sheet arranged relatively far from the wearer's skin, and an absorbent body interposed between the two sheets,
The absorbent body includes an absorbent core;
The absorbent body is provided with a first stretchable region located on a side edge along the longitudinal direction of the absorbent core and stretchable in the longitudinal direction, an inner leakproof cuff having a second stretchable region extending along the longitudinal direction and stretchable in the longitudinal direction, and an outer leakproof cuff having a third stretchable region extending along the longitudinal direction and stretchable in the longitudinal direction ,
Each of the stretchable regions is configured by disposing an elastic member extending along the longitudinal direction in a stretched state between a pair of opposing nonwoven fabrics,
The elasticated regions are formed so as to be parallel to each other in a plan view when the absorbent article is in an unfolded and maximum stretched state,
When viewed from above in a state in which the absorbent article is unfolded and maximally stretched, the elastic members constituting the third elasticated region are linearly arranged from one end to the other end, and the elastic members constituting the second elasticated region and the elastic members constituting the third elasticated region are in a non-intersecting state;
When the absorbent article is in a relaxed state, the second elasticated zone stands vertically higher than the first elasticated zone, and the second elasticated zone stands vertically higher than the third elasticated zone,
An absorbent article, wherein in a relaxed state of the absorbent article, the inner leak-proof cuff and the outer leak-proof cuff are erected to form a space between these leak-proof cuffs defined by these leak-proof cuffs. The absorbent article according to claim 1, wherein, in a relaxed state of the absorbent article, at least a portion of the third stretch zone is located outward in the width direction from the second stretch zone in a plan view. The absorbent article has a ventral region that is disposed on the ventral side when the absorbent article is worn, a dorsal region that is disposed on the dorsal side of a wearer, and a crotch region that is located between the ventral region and the dorsal region,
The absorbent article according to claim 1 or 2, wherein, in a relaxed state of the absorbent article, the third elasticated zone located in the crotch region is located widthwise outward of the second elasticated zone in a plan view. The exterior body includes a ventral exterior body disposed in the ventral region and a dorsal exterior body disposed in the dorsal region,
The absorbent article according to claim 3 , wherein the absorbent body including the absorbent core is disposed so as to span between the ventral exterior body and the rear exterior body. The absorbent core comprises an absorbent sheet having two identical or different fibrous sheets and particles of a water-absorbing polymer disposed between the fibrous sheets;
A laminated structure including an auxiliary layer disposed adjacent to the skin-facing surface of the absorbent sheet,
The absorbent article according to any one of claims 1 to 4 , wherein the auxiliary layer is a mixed laminate containing at least water-absorbent natural fibers and water-absorbent polymers. The absorbent article according to claim 5 , wherein the side regions of the absorbent sheet extend outward in the width direction beyond the side edges of the auxiliary layer in a plan view. the inner leakproof cuff has a first base end portion which is a standing end of the inner leakproof cuff, a second stretchable region which is a free end portion, and a first bent portion which is located between the first base end portion and the free end portion and extends in a longitudinal direction,
The absorbent article according to any one of claims 1 to 6 , wherein, in a relaxed state and in a plan view of the absorbent article, the second elasticated zone protrudes outward in a width direction at the first bent portion. the outer leakproof cuff has a second base end portion which is a standing end of the outer leakproof cuff, a third stretchable region which is a free end portion, and a second bent portion which is located between the second base end portion and the free end portion and extends in a longitudinal direction,
The absorbent article according to claim 7 , wherein, in a relaxed state and in a plan view, the third elasticated zone protrudes outward in the width direction at the second bent portion. The absorbent core comprises an absorbent sheet having two identical or different fibrous sheets and particles of a water-absorbing polymer disposed between the fibrous sheets;
A laminated structure including an auxiliary layer disposed adjacent to the skin-facing surface of the absorbent sheet,
The auxiliary layer is a mixed stack containing at least a water-absorbent natural fiber and a water-absorbent polymer,
The side regions of the absorbent sheet extend outward in the width direction beyond the side edges of the auxiliary layer in a plan view,
9. The absorbent article according to claim 7 or 8 , wherein, in a relaxed state of the absorbent article, the second elasticated zones are located on the side zones of the absorbent sheet in a plan view. The absorbent article according to any one of claims 1 to 9, wherein the inner leakproof cuff further comprises a liquid-impermeable film disposed between the pair of opposing nonwoven fabrics. The absorbent core has a bend induction portion extending along the longitudinal direction at a position inward in the width direction from the first elasticated region in a plan view in an unfolded and maximum stretched state,
The absorbent article according to any one of claims 1 to 10, wherein in a relaxed state of the absorbent article, the absorbent core is configured to stand up between the first stretch zone and the bend induction portion.

Images