JP2023000881A - absorbent article - Google Patents

Abstract

To provide an absorbent article that achieves both improvement in preventing lateral leakage of body fluid and reduction in a sense of discomfort when worn.SOLUTION: An absorbent article 1 has a longitudinal direction X and a width direction Y, and is provided with: an absorbent body 2 provided with a front surface sheet 3, a back surface sheet 4, and an absorbent 5; and leak-proof cuffs. Each leak-proof cuff has an inner leak-proof cuff 8 and an outer leak-proof cuff 9. Each leak-proof cuff has nonwoven fabrics facing each other and an elastic member disposed between the nonwoven fabrics in a stretched state to extend in the longitudinal direction. In a plan view in a maximally stretched state, the inner leak-proof cuff 8 has a region that overlaps the absorbent 5 on each of a skin facing surface and a non-skin facing surface of the absorbent 5. A liquid impermeable sheet 85 arranged in the inner leak-proof cuff 8 is arranged, in a plan view in the maximally stretched state, in at least a part of the overlapping region between the inner leak-proof cuff 8 and the skin facing surface of the absorbent 5, and is arranged so as to be positioned across the entire overlapping region between the inner leak-proof cuff 8 and the non-skin facing surface of the absorbent 5.SELECTED DRAWING: Figure 4

Description

The present invention relates to absorbent articles.

Absorbent articles typically include an absorbent body mainly made of a water-absorbing material such as pulp or a water-absorbing polymer, and a leak-preventing cuff.
The present applicant has proposed a disposable diaper comprising an absorbent body having a central absorbent body, a pair of side absorbent bodies and a separation part, and a covering sheet covering the entire absorbent body, wherein the separation part is in contact with the skin. A disposable diaper has been proposed in which a cover sheet positioned on the face side and a cover sheet positioned on the non-skin contact side are joined and fixed with an adhesive (see Patent Document 1).

In addition, the present applicant has proposed an absorbent main body including an absorbent core, inner three-dimensional gathers disposed on both sides of the absorbent main body, and outer three-dimensional gathers located outside the inner three-dimensional gathers in the width direction. and in which a water-repellent film is continuously arranged from the non-skin-contacting side of the absorbent core to each gather (see Patent Document 2).

In Patent Document 3, a top sheet is wrapped from both sides of an article main body to the back side and adhered to the outer surface of the end portion of a waterproof film, and the fixed end portion of a three-dimensional gather is wrapped to the back side. Disclosed is an absorbent article attached to a body.

JP 2006-247363 A JP 2013-252323 A JP-A-2005-65729

The absorbent articles described in Patent Literatures 1 and 2 have good side leakage prevention performance and leakage prevention properties, but there is room for improvement in terms of reducing the feeling of discomfort in the legs caused by the stiffness of the gathers. there were. In addition, it is difficult for the absorbent article described in Patent Literature 3 to achieve both improved leakproofness and reduced discomfort.

Accordingly, the present invention relates to providing an absorbent article that achieves both improved prevention of lateral leakage of bodily fluids and reduced discomfort when worn.

The present invention has a longitudinal direction corresponding to the front-rear direction of a wearer and a width direction orthogonal thereto, and comprises an absorbent main body comprising a topsheet, a backsheet and an absorbent body, and a leak-proof cuff extending in the longitudinal direction. An absorbent article comprising
The leak-proof cuffs have a pair of inner leak-proof cuffs extending along the longitudinal direction and stretchable in the longitudinal direction, and an outer leak-proof cuff extending along the longitudinal direction and stretchable in the longitudinal direction,
Each of the leak-proof cuffs has a pair of opposing nonwoven fabrics and an elastic member arranged in a stretched state between the nonwoven fabrics to extend along the longitudinal direction,
In a plan view of the absorbent article in the maximum stretched state, the inner leak-proof cuff has a region overlapping the absorbent body on each of the skin-facing surface and the non-skin facing surface of the absorbent body,
The inner leak-proof cuff further comprises a liquid-impermeable sheet,
The liquid-impermeable sheet is
It is arranged on the inner leak-preventing cuff so as to be located in at least a part of the region where the inner leak-preventing cuff and the skin-facing surface of the absorbent body overlap in plan view in the maximum stretched state of the absorbent article. Along with being
It is arranged on the inner leak-proof cuff so as to be positioned over the entire region where the inner leak-proof cuff and the non-skin facing surface of the absorbent body overlap in a plan view of the absorbent article in the maximum stretched state. , which provides an absorbent article.

ADVANTAGE OF THE INVENTION According to this invention, the absorbent article which improved the side leakage prevention of a bodily fluid and reduced discomfort at the time of wearing is provided.

FIG. 1 is a perspective view schematically showing a relaxed state of an underpants-type disposable diaper, which is one embodiment of the absorbent article of the present invention. FIG. 2 is a developed plan view schematically showing the skin-facing surface side (top sheet side) of the absorbent article shown in FIG. 1 in a developed and maximum stretched state. FIG. 3 is a cross-sectional view schematically showing a cross section of the absorbent article shown in FIG. 2 taken along line II. FIG. 4 is a cross-sectional view schematically showing a cross section along line II of the absorbent article shown in FIG. 2 in a relaxed state. FIG. 5 is a cross-sectional view schematically showing another embodiment of the absorbent article of the present invention in a relaxed state. FIG. 6 is a cross-sectional view schematically showing still another embodiment of the absorbent article of the present invention in a relaxed state. FIG. 7 is a cross-sectional view schematically showing still another embodiment of the absorbent article of the present invention in a relaxed state. FIG. 8 is a cross-sectional view schematically showing still another embodiment of the absorbent article of the present invention in a relaxed state. FIG. 9 is a cross-sectional view schematically showing still another embodiment of the absorbent article of the present invention in a relaxed state. FIG. 10 is a cross-sectional view schematically showing still another embodiment of the absorbent article of the present invention in a relaxed state. FIG. 11 is a cross-sectional view schematically showing still another embodiment of the absorbent article of the present invention in a relaxed state.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described based on its preferred embodiments with reference to the drawings. 1 to 4 show one embodiment of an underpants-type disposable diaper, which is a preferred embodiment of the absorbent article of the present invention.

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

As used herein, the term “skin-facing surface” refers to the surface of an absorbent article or its constituent members (e.g., an absorbent body) facing the wearer's skin when the absorbent article is worn, that is, the surface facing the wearer's skin. The "non-skin facing surface" is the side of the absorbent article or its constituent members that faces away from the skin when the absorbent article is worn, i.e., the side that is relatively far from the wearer's skin. on the side. It should be noted that the term "when worn" as used herein means a state in which the absorbent article is maintained in a normal and appropriate wearing position, that is, in a correct wearing position of the absorbent article.

As shown in FIGS. 1 and 2, the diaper 1 includes an absorbent body 2 capable of absorbing and holding excrement, and an outer body 10 disposed on the non-skin facing side of the absorbent body 2. there is The outer body 10 is a member that forms the outer shape of the diaper 1 . The peripheral edge of the outer body 10 forms contours of the abdominal area F and the dorsal area R of the diaper 1, respectively. The exterior body 10 includes a ventral exterior body 10F that extends in the width direction Y and is arranged in the ventral region F, and a dorsal exterior body 10F that is separate from this and extends in the width direction Y and is arranged in the dorsal region R. and a side exterior body 10R. That is, the diaper 1 in this embodiment is a pants-type disposable diaper known as a split type. The absorbent main body 2 extends in the longitudinal direction X from the ventral region F to the dorsal region R, and includes a ventral exterior body 10F and a dorsal exterior body 10F and the dorsal exterior that are arranged at a predetermined interval in the longitudinal direction X. It is arranged so as to bridge between it and the body 10R. Instead of this embodiment, the outer body 10 may have a form in which the entire abdominal region F, crotch region M, and back region R on the outer surface of the diaper 1 are continuously arranged.

In the diaper 1, a pair of side seal portions S, S are formed by jointing both sides in the width direction Y of the abdominal exterior body 10F and both sides in the width direction Y of the back exterior body 10R. Thereby, the exterior bodies 10F and 10R are connected in a ring. Further, the diaper 1 is formed with a waist opening WH through which the wearer's torso is passed, and a pair of leg openings LH through which the wearer's lower legs are passed. The side seal portion S is formed by a bonding method such as an adhesive, heat sealing, or ultrasonic sealing.

In this specification, the "maximum stretched state" of the absorbent article or the diaper 1 means that the diaper 1 is separated at the side seal portions S to be in an unfolded state, and the elastic members of each portion of the diaper 1 in the unfolded state are stretched to the maximum. , The state of being expanded until it becomes the same as the design size, that is, the size when it is expanded in a plane with the influence of the elastic member completely eliminated. In addition, the "relaxed state" of the absorbent article (diaper 1) means a state in which the absorbent article is not stretched without applying an external force to each elastic member arranged in the absorbent article. .

The absorbent main body 2 consists of a liquid-permeable surface sheet 3 arranged at a position relatively close to the wearer's skin, and a liquid-impermeable or liquid-impermeable surface sheet 3 arranged at a position relatively far from the wearer's skin. The absorbent body 5 includes a back sheet 4 that is resistant to water (hereinafter collectively referred to as "liquid resistance") or water repellent, and an absorbent body 5 interposed between the two sheets 3,4. These members constituting the absorbent main body 2 are integrated by a known bonding method such as an adhesive.

As the topsheet and the backsheet, those conventionally used in absorbent articles such as disposable diapers can be used without particular limitation. For example, various nonwoven fabrics can be used as the surface sheet. As the back sheet, a liquid-resistant or water-repellent nonwoven fabric, a resin film, a laminate of a resin film and a nonwoven fabric, or the like can be used. As the core wrap sheet, the same material as the surface sheet can be used. As the sheet for forming the leak-proof cuff, the same sheet as the back sheet can be used.

As shown in FIGS. 3 and 4, the topsheet 3 traverses the skin-facing surface side of the absorbent body 5 in the width direction Y and extends from both side edges of the topsheet 3 along the longitudinal direction X of the absorbent body 5 . The extended portion 3E is wrapped around the non-skin facing side of the absorbent body 5 .

In this embodiment, the pair of extending portions 3E, 3E of the surface sheet 3 are connected to the absorber 5 and the sheet for forming the leak-proof cuff, which will be described later, at the first base end portion 81 of the inner leak-proof cuff 8, which will be described later. fixed between 80 and The surface sheet 3 does not cover the entire non-skin facing surface of the absorbent body 5, but covers the central portion of the non-skin facing surface of the absorbent body 5 in the width direction Y (between the pair of first base end portions 81, 81). position) is not covered with the surface sheet 3.

In this embodiment, the surface sheet 3 has a size capable of covering the entire skin-facing surface of the absorbent body 5 , and covers the 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 range inward in the width direction Y from both side edges of the non-skin facing surface of the absorbent body 5 . The surface sheet 3 in this embodiment is a flat sheet having no irregularities. A sheet having a shape may be used.

The absorbent body 5 typically includes an absorbent core 6 having a single layer structure or a laminated structure and a core wrap sheet (not shown) covering the absorbent core 6 . The absorber 5 is arranged at least in the crotch region M, and in addition to the crotch region M, it is continuously arranged in at least one of the ventral region F and the back region R. In this embodiment, as shown in FIG. 2, the absorbent body 5 has a rectangular shape in a plan view, and in a state in which the longitudinal direction of the absorbent body 5 is aligned with the longitudinal direction X of the diaper 1, the abdominal area F and the crotch area are arranged. It is distributed over the entire area of M and the dorsal region R.

The absorbent core 6 is, for example, a stack of water-absorbing natural fibers such as pulp fibers, a mixed stack containing water-absorbing natural fibers and a water-absorbing polymer, and/or two identical or different fiber sheets. and at least one type of absorbent sheet comprising water-absorbent polymer particles interposed between the fiber sheets. When the absorbent core includes both the stack and the absorbent sheet, the sizes in plan view may be the same or different. The core wrap sheet is made of tissue paper or water-permeable nonwoven fabric. The core wrap sheet preferably covers the entire skin-facing side and non-skin-facing side of the absorbent core.

In the diaper 1 of this embodiment, a pair of inner leak-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 as leak-preventing cuffs. The inner leak-proof cuff 8 extends in the longitudinal direction X and is configured to be stretchable in the longitudinal direction.

Each inner leak-proof cuff 8 independently includes a pair of leak-proof cuff-forming sheets 80 that are liquid-resistant or water-repellent and breathable. The pair of leakage-preventing cuff-forming sheets 80 may be constructed by folding one sheet 80 in two along the longitudinal direction and including facing portions, and may be constructed by two or more sheets 80. may be The inner leak-preventing cuff 8 in this embodiment is formed by one sheet 80 for forming a leak-preventing cuff that is folded in two and opposed to each other along the longitudinal direction. Each inner leak-proof cuff 8 extends along the longitudinal direction X and is arranged continuously 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. there is

As the leakage-preventing cuff forming sheet 80, a material such as a non-woven fabric, which is used as a material for leakage-prevention cuffs in this type of absorbent article, can be used without particular limitation. , a laminated material of a resin film and a non-woven fabric, or the like can be used.

The inner leak-preventing cuff 8 has a first base end portion 81 to which a sheet 80 for forming a leak-preventing cuff is fixed to another member, and a first standing portion 82 from which the sheet 80 stands on the wearer's side. there is The first upright portion 82 forms a free end portion of the inner leak-proof cuff 8 and is a portion of the leak-proof cuff-forming sheet 80 that is not fixed to other members. The first standing portion 82 exists at least in the crotch region M. As shown in FIG.

The first base end portion 81 is a portion that becomes a standing end when the first standing portion 82 stands up toward the wearer's skin when the diaper 1 is put on. , a portion fixed to another member, specifically, a constituent member of the absorbent main body 2 and/or the exterior body 10 by a known fixing method such as an adhesive or heat sealing. The first base end portion 81 extends continuously or discontinuously in the longitudinal direction X over substantially the entire length of the leak-proof cuff forming sheet 80 . The first base end portion 81 is located on the non-skin facing surface side of the absorbent body 5 .

The first standing portion 82 extends in the longitudinal direction X and is configured to be extendable and contractible in the longitudinal direction.
In this embodiment, as shown in FIGS. 2 and 3, a plurality of leakage-preventing cuff-forming elastic members 83 are arranged along the longitudinal direction X on the side near the free end of the first upright portion 82 . is arranged in an extended state so as to extend Each elastic member 83 is, for example, fixed in a stretched state by a fixing method such as an adhesive between the anti-leakage cuff forming sheets 80, 80 which are folded in two along the longitudinal direction X and face each other. Each elastic member 83 is arranged at least in the crotch region M independently. In this embodiment, both ends of each elastic member 83 independently extend to both ends in the longitudinal direction X of the inner leak-proof cuff 8, and the ventral region F, the crotch region M, and the back region. It is arranged continuously in the side region R.
The number of elastic members 83 is not particularly limited, and may be one or more independently.

By having the above-described structure, the inner leak-proof cuff 8 is formed with a stretchable region in the longitudinal direction X at least at the free end where the elastic member 83 is arranged. Further, by having the above-described configuration, when the diaper 1 is viewed from above in its maximum stretched state, the first base end portion 81 is located on the non-skin facing side of the absorbent body 5, and the first upright portion At least the free end portion of 82 where elastic member 83 is arranged is located on the skin-facing side of absorbent body 5 . In other words, the inner leak-proof cuff 8 has a region overlapping the absorbent body 5 on each of the skin-facing surface and the non-skin facing surface of the absorbent body 5 when viewed in plan with the diaper 1 in the maximum stretched state.

As shown in FIG. 4 , the inner leak-proof cuff 8 extends outward in the width direction Y at a bent portion 8 f extending along the longitudinal direction X between the first base end portion 81 and the free end of the first upright portion 82 . It is preferably divided into a lower region 8b located on the first base end portion 81 side and an upper region 8u located on the free end side of the first upright portion 82. As shown in FIG. As a result, the free ends of the first standing portions 82 are formed to protrude outward in the width direction Y in the relaxed state of the absorbent article. The elastic member 83 is arranged at a portion of the upper region 8u that protrudes outward in the width direction Y, and the upper region 8u has stretchability in the longitudinal direction. With such a configuration, the upper region 8u can be in surface contact with the wearer's skin, so body fluids can be prevented from leaking out of the diaper through the inner leak-proof cuff.

In the embodiment shown in FIG. 4, at least in the crotch region M, the inner leak-proof cuff 8 is bent at the bent portion 8f so that the bent portion 8f extends inward in the width direction Y from the free end of the first upright portion 82. positioned. Therefore, in the relaxed state of the diaper 1, the inner leak-proof cuff 8 is bent at the bent portion 8f, and the free ends including the free ends of the first upright portions 82 protrude outward in the width direction Y. As shown in FIG. Both the lower region 8b and the upper region 8u extend along the longitudinal direction X and are substantially rectangular in plan view.

As shown in FIG. 2 , it is preferable that erection inhibiting portions 88 , which are portions of the sheet 80 for forming the leak-proof cuff, being inhibited from standing up, are formed at both ends of the inner leak-proof cuff 8 in the longitudinal direction X. As shown in FIG. . A pair of standing-up inhibiting portions 88 are formed in the ventral region F and the dorsal region R, respectively. The standing-up inhibiting portion 88 is typically formed by fixing the leak-proof cuff-forming sheet 80 to the topsheet 3 positioned on the skin-facing surface of the absorbent body 2 .

A pair of erection-inhibiting portions 88 are formed at both ends of the inner leak-proof cuff 8 in the longitudinal direction X, so that when the diaper 1 is worn, the first erecting portion 82 is a portion sandwiched between the erection-inhibiting portions. However, due to the contractile force of the leakage-preventing cuff-forming elastic member 83, the first base end portion 81 stands up toward the wearer's skin side. In such an upright state of the inner leak-proof cuff 8, the upright first upright portion 82 prevents body fluids such as urine excreted by the wearer from moving outward in the width direction Y. is effectively suppressed.
Although not shown, when the inner leak-preventing cuffs 8 are in an upright state, the contractile force of the leak-preventing cuff-forming elastic members 83 causes the diaper 1 as a whole to become non-existent at the central portion in the longitudinal direction X of the absorbent main body 2 . Since the diaper 1 is curved and deformed so as to be convex on the side facing the skin (the side of the back sheet 4), the diaper 1 can easily fit the shape of the wearer's body.

The diaper 1 has a pair of outer leak-preventing cuffs 9 extending in the longitudinal direction at least on both sides of the crotch region M in the width direction Y as leak-preventing cuffs. 2 and 3, the outer leak-proof cuffs 9 are positioned separately outward in the width direction Y from the inner leak-proof cuffs 8, extend in the longitudinal direction X, It is configured to be stretchable in the longitudinal direction. The outer leak-proof cuffs 9 are formed so as to be parallel to each other with the inner leak-proof cuffs 8 in the maximum stretched state of the diaper. Each outer leak-proof cuff 9 is arranged on the non-skin facing side of the absorbent main body 2 .

The outer leak-proof cuffs 9 each independently include an outer leak-proof cuff-forming sheet 90 such as a liquid-resistant or water-repellent breathable nonwoven fabric, like the inner leak-proof cuff 8. . The pair of outer leakage-preventing cuff forming sheets 90 may be configured by folding one sheet 90 in two along the longitudinal direction and including opposed portions as shown in this embodiment. Alternatively, it may be composed of two or more sheets 90 . Each of the outer leak-proof cuffs 9 is arranged continuously in the longitudinal direction over at least the entire crotch region M on both sides in the width direction Y of the absorbent main body 2 .

As with the inner leak-proof cuff 8, the outer leak-proof cuff 9 has a second base end portion 91 to which a sheet 90 for forming an outer leak-proof cuff is fixed to another member, and the sheet 90 can stand up on the wearer's side. and a second upright portion 92 . The second standing portion 92 is a portion of the outer leak-proof cuff forming sheet 90 that is not fixed to other members. The second standing portion 92 exists at least in the crotch region M. As shown in FIG.

The second base end portion 91 is a portion that becomes a base end when the second standing portion 92 stands up toward the wearer's skin when the diaper 1 is put on, and is made of a non-woven fabric sheet or the like for forming an outer leak-proof cuff. Reference numeral 90 denotes a portion joined to another member, specifically the non-skin-facing surface of the absorbent main body 2 . The second base end portion 91 extends continuously or discontinuously in the longitudinal direction X over substantially the entire length of the outer leak-proof cuff forming sheet 90 . In this embodiment, the second base end portion 91 is formed at a position overlapping the first base end portion 81 in plan view.

The second standing portion 92 extends in the longitudinal direction X and is configured to be extendable and contractible in the longitudinal direction.
In this embodiment, as shown in FIG. 3, one or more outer leak-proof cuffs are formed at the free end of the second upright portion 92 (hereinafter also referred to as the "second free end"). An elastic member 93 is arranged in a stretched state so as to extend along the longitudinal direction X. As shown in FIG. Each elastic member 93 is fixed in a stretched state by a fixing method such as an adhesive agent between the outer leak-proof cuff forming sheets 90 that are folded in two along the longitudinal direction X and face each other. In this embodiment, one end of each elastic member 93 is located in the ventral region F and the other end is located in the dorsal region R. Each elastic member 93 is located in the ventral region F , the crotch region M and the back region R.
As a result, the second upright portion 92 forms a region having stretchability in the longitudinal direction X at least at the free end portion where the elastic member 93 is arranged.

By forming the outer leak-proof cuffs 9 in this manner, when the diaper 1 is put on, the second upright portions 92 cause the elastic members 93 for forming the leak-proof cuffs to contract, similarly to the inner leak-proof cuffs 8 . Due to the force, it stands up toward the wearer's skin side with the second base end portion 91 as the upright base end. In the erected state of the outer leak-proof cuff 9, the erected second erected portion 92 unintentionally moves outward in the width direction Y from the erected inner leak-proof cuff 8. ) can be effectively prevented from leaking out of the absorbent article. As a result, side leakage, particularly in the crotch region M, is effectively suppressed.

Returning to the description of the inner leak-preventing cuff 8, the inner leak-preventing cuff 8 preferably further includes a liquid-impermeable sheet 85 in addition to the sheet 80 for forming the leak-preventing cuff. As a result, side leakage of body fluid can be prevented, and body fluid can be efficiently absorbed by the absorber. The liquid-impermeable sheet 85 can be, for example, a liquid-resistant or water-repellent and air-permeable nonwoven fabric sheet similar to the leak-proof cuff forming sheet 80, or a resin film.

In a plan view of the diaper 1 in the maximum stretched state, the liquid-impermeable sheet 85 is located in at least a part of the region where the inner leak-proof cuff 8 and the skin-facing surface of the absorbent body 5 overlap, and It is preferable that the inner leak-preventing cuff 8 is arranged so as to be positioned over the entire area where the leak-preventing cuff 8 and the non-skin facing surface of the absorbent body 5 overlap. That is, it is preferable that the liquid-impermeable sheet 85 overlaps the absorbent body 5 on each of the skin-facing surface and the non-skin-facing surface of the absorbent body 5 when viewed from above in the maximum stretched state of the diaper 1 .

An example of the arrangement of the liquid impermeable sheet 85 is shown in FIGS. 3 and 4. FIG. The liquid-impermeable sheet 85 is separate from the first liquid-impermeable sheet 86 arranged on the inner leak-proof cuff 8 and the first liquid-impermeable sheet 86, and extends in the width direction of the back sheet 4. and a second liquid-impermeable sheet 87 extending from both Y ends. Each of the liquid-impermeable sheets 86 and 87 is independently arranged at least in the crotch region M, and, like the inner leak-proof cuff 8, extends to both edges in the longitudinal direction X to extend to the ventral region F. , the crotch region M and the back region R. Both the liquid-impermeable sheets 86 and 87 are at least joined to the leak-proof cuff-forming sheet 80 . As long as the effects of the present invention are exhibited, there are no particular restrictions on the joining method and joint sites between the liquid-impermeable sheets 86 and 87 and the leak-proof cuff-forming sheet 80 .

The first liquid-impermeable sheet 86 preferably has a portion disposed between the leak-proof cuff forming sheets 80 such as non-woven fabric in the inner leak-proof cuff 8. As shown in this embodiment, the first liquid-impermeable sheet 86 is More preferably, all of the impermeable sheets 86 are arranged between the leak-proof cuff-forming sheets 80 such as non-woven fabric in the inner leak-proof cuff 8 . With such a configuration, it is possible to further improve prevention of lateral leakage of bodily fluids while reducing discomfort caused by contact of the first liquid-impermeable sheet 86 with the wearer's skin.

Further, the second liquid-impermeable sheet 87 in this embodiment is integrated with the backsheet 4 . The back sheet 4 in this embodiment is arranged between the inner leak-proof cuff 8 and the outer leak-proof cuff 9 . With such a configuration, lateral leakage through the inner leak-proof cuff 8 is reduced not only in the crotch region M where bodily fluids are excreted, but also in the ventral region F and the dorsal region R. As a result, the side leakage prevention performance of the diaper 1 as a whole is further improved.

As in the present embodiment, when there is a portion where the liquid-impermeable sheet 85 is integrally configured so as to extend from the backsheet 4, the backsheet 4 is positioned in the central region in the width direction Y. and a sheet arranged between the pair of second base ends 91 , 91 . Also, the liquid-impermeable sheet 85 is a sheet positioned outward in the width direction Y from the second base end portion 91 . This description is common throughout the specification.

When the first liquid-impermeable sheet 86 and the second liquid-impermeable sheet 87 are arranged as the liquid-impermeable sheet 85 as in the present embodiment, as shown in FIGS. , the end 4e of the second liquid-impermeable sheet 87 is positioned further inward in the width direction Y than the end 8s of the first liquid-impermeable sheet 86 in a cross-sectional view of the diaper 1 in the maximum stretched state. It is preferably located outside in the width direction Y. With such a configuration, the liquid-impermeable sheets 86 and 87 form overlapping portions in plan view, and body fluids are prevented from leaking from the inside of the inner leak-proof cuff 8 to the outside of the diaper. can be further reduced, and the side leakage prevention performance of the entire diaper 1 is further improved.

When the first liquid-impermeable sheet 86 and the second liquid-impermeable sheet 87 are arranged as the liquid-impermeable sheet 85, each liquid-impermeable sheet 86 and the second liquid-impermeable sheet 87 are arranged in a plan view with the diaper 1 in the maximum stretched state. The length W1 (see FIG. 4) in the width direction Y of the overlapping portion of the adhesive sheets 86 and 87 in plan view is each independently preferably 1 mm or more, more preferably 5 mm or more, and preferably 50 mm or less. It is preferably 30 mm or less.

When the liquid-impermeable sheet 85 has a portion disposed between the leak-proof cuff-forming sheets 80 such as non-woven fabric in the inner leak-proof cuff 8, the free end of the inner leak-proof cuff 8 is a liquid-impermeable sheet. It is preferable to have a portion where the free end does not exist, and it is more preferable to have a portion where the liquid-impermeable sheet 85 does not exist in the end region including the free end of the free end. In this embodiment, the end portion 8g of the first liquid-impermeable sheet 86 located on the outer side in the width direction Y is arranged so as not to reach the free end of the inner leak-proof cuff 8. A region where the liquid-impermeable sheet 85 does not exist is formed in the end region including the free end of the leak-proof cuff 8 . The end region including the free end of the inner leak-proof cuff 8 is formed at least in the crotch region M, has a predetermined width inward in the width direction Y, and extends in the longitudinal direction X from the free end.
Since the free end of the inner leak-preventing cuff 8 is a portion that easily touches the wearer's skin, this configuration further enhances the flexibility of the inner leak-preventing cuff 8, making it easier to wear the absorbent article. The discomfort of time can be further reduced.

Another embodiment of the inner leakproof cuff 8 and liquid impermeable sheet 85 is shown in Figures 5-11. In any form, the liquid-impermeable sheet 85 is at least part of the region where the inner leak-proof cuff 8 and the skin-facing surface of the absorbent body 5 overlap in plan view with the absorbent article in its maximum stretched state. and is located over the entire region where the inner leak-proof cuff 8 and the non-skin facing surface of the absorbent body 5 overlap. In the embodiments shown in FIGS. 5 to 11, for convenience of explanation, the inner leak-proof cuff 8 and the outer leak-proof cuff 9 on one side in the width direction are mainly illustrated. The leak-proof cuff 8 and the outer leak-proof cuff 9 are similarly applicable.

In the embodiment shown in FIG. 5, the liquid-impermeable sheet 85 is integrally formed so as to extend outward in the width direction Y from the backsheet 4 . In this embodiment, a liquid-impermeable sheet 85 is arranged between the leak-proof cuff forming sheets 80 such as non-woven fabric in each of the inner leak-proof cuffs 8 . The liquid-impermeable sheet 85 of one of the inner leak-proof cuffs 8 and the liquid-impermeable sheet 85 of the inner leak-proof cuff 8 of the other diaper 1 are connected via the back sheet 4 located in the center region in the width direction Y. distributed as one unit. Instead of this form, the first liquid-impermeable sheet 86 and the second liquid-impermeable sheet 87 extending from the back sheet 4 are separately arranged between the leak-proof cuff forming sheets 80 . may have been The inner leak-proof cuff 8 of the present embodiment is bent outward in the width direction Y at the bent portion 8f to be divided into a lower region 8b and an upper region 8u. The upper region 8u has a portion where the first liquid-impermeable sheet 86 is arranged between the leak-preventive cuff-forming sheets 80. As shown in FIG. Even with such a configuration, the effects of leakage prevention and reduction of uncomfortable feeling when worn are sufficiently exhibited.

In the embodiment shown in FIG. 6, similarly to the embodiment shown in FIG. a seat 87; A second liquid-impermeable sheet 87 is integrally formed so as to extend outward in the width direction Y from the backsheet 4 . In this embodiment, the inner leak-preventing cuff 8 does not have the bent portion 8f, and the free end portion of the inner leak-preventing cuff 8 does not protrude outward in the width direction Y. As shown in FIG. The end portion 4e of the second liquid-impermeable sheet 87 is located on the outer side in the width direction Y than the end portion 8s of the first liquid-impermeable sheet 86 located on the inner side in the width direction Y. An end portion 8 g of the first liquid-impermeable sheet 86 located on the outer side in the width direction Y reaches the region where the elastic member 83 is arranged, but does not reach the free end of the inner leak-proof cuff 8 . Even with such a configuration, the effects of leakage prevention and reduction of uncomfortable feeling when worn are sufficiently exhibited.

In the embodiment shown in FIG. 7, similarly to the embodiment shown in FIG. a seat 87; A second liquid-impermeable sheet 87 is integrally formed so as to extend outward in the width direction Y from the backsheet 4 . The inner leak-proof cuff 8 of the present embodiment is bent outward in the width direction Y at the bent portion 8f to be divided into a lower region 8b and an upper region 8u. The end portion 4e of the second liquid-impermeable sheet 87 is located on the outer side in the width direction Y than the end portion 8s of the first liquid-impermeable sheet 86 located on the inner side in the width direction Y. An end portion 8g of the first liquid-impermeable sheet 86 positioned on the outer side in the width direction Y is positioned on the inner side in the width direction Y from the region where the elastic member 83 is arranged. Even with such a configuration, the effects of leakage prevention and reduction of uncomfortable feeling when worn are sufficiently exhibited.

The embodiment shown in FIG. 8 has a first liquid-impermeable sheet 86 and a second liquid-impermeable sheet 87 arranged on the inner leak-proof cuff 8, similarly to the embodiment shown in FIG. A second liquid-impermeable sheet 87 is integrally formed so as to extend outward in the width direction Y from the backsheet 4 . In this embodiment, the inner leak-proof cuff 8 of this embodiment is bent outward in the width direction Y at the bent portion 8f to be divided into a lower region 8b and an upper region 8u. The position of the end portion 4e of the second liquid-impermeable sheet 87 overlaps the position of the end portion 8s of the first liquid-impermeable sheet 86 located on the inner side in the width direction Y in plan view, or the end portion 8s It is positioned inward in the width direction Y from the . Even with such a configuration, the effects of leakage prevention and reduction of uncomfortable feeling when worn are sufficiently exhibited.

The embodiment shown in FIG. 9 also has a first liquid-impermeable sheet 86 disposed on the inner leak-proof cuff 8 and a second liquid-impermeable sheet 87 separate from the sheet 86 . In the relaxed state of the diaper, the first liquid-impermeable sheet 86 is arranged so as to have a portion exposed on the inner surface in the width direction Y of the inner leak-proof cuff 8 . The inner leak-proof cuff 8 of the present embodiment is bent outward in the width direction Y at the bent portion 8f and divided into a lower region 8b and an upper region 8u. The elastic sheet 86 has a portion disposed between the sheets 80 for forming the leak-proof cuff. Even with such a configuration, the effects of leakage prevention and reduction of uncomfortable feeling when worn are exhibited.

In the embodiment shown in FIG. 10, similarly to the embodiment shown in FIG. a seat 87; In the relaxed state of the diaper, the first liquid-impermeable sheet 86 is arranged so as to have a portion exposed on the inner surface in the width direction Y of the inner leak-proof cuff 8 . The inner leak-proof cuff 8 of the present embodiment is bent outward in the width direction Y at the bent portion 8f to be divided into a lower region 8b and an upper region 8u. In the upper region 8u, the first liquid-impermeable sheet 86 is not arranged between the leak-proof cuff-forming sheets 80. As shown in FIG. Even with such a configuration, the effects of leakage prevention and reduction of uncomfortable feeling when worn are exhibited.

In the embodiment shown in FIG. 11, two anti-cuff forming sheets 80 are arranged to face each other, and a first liquid-impermeable sheet 86 is arranged between the sheets 80 . For other configurations, the description of the embodiment shown in FIGS. 3 and 4 is appropriately applied. Even with such a configuration, the effects of leakage prevention and reduction of uncomfortable feeling when worn are sufficiently exhibited.

The advantage of further improving the fit to the wearer, and the side leakage of body fluid caused by exceeding the upper part of the inner leak-proof cuff 8 or permeating through the constituent members of the inner leak-proof cuff 8 and seeping out is more effective. 3 and 4, the inner leakage prevention cuff 8 shown in FIGS. and the liquid-impermeable sheet 85 are more preferably arranged.

As described above, the diaper 1 has the outer body 10 arranged on the non-skin facing side of the absorbent core 6 . The exterior body 10 in this embodiment has a ventral exterior body 10F arranged in the ventral region F and a dorsal exterior body 10R separately disposed in the dorsal region R. . The outer body 10 has a rectangular shape in which both end regions in the longitudinal direction X corresponding to the dorsal region R are longer in the width direction Y than in the longitudinal direction X when the diaper 1 is in the unfolded and maximum stretched state shown in FIG. and in the central region in the longitudinal direction X corresponding to the crotch region M, both side edges along the longitudinal direction X of the central region are arranged to be curved.

The outer layer sheet 11 is arranged at a position relatively distant from the absorbent body 5 and forms the outer surface of the diaper 1, and the outer layer sheet 11 is arranged at a position relatively close to the absorbent body 5 and forms the inner surface of the diaper 1. It is configured including an inner layer sheet 12 . Both sheets 11 and 12 are joined together and integrated with each other by an adhesive, fusion, or the like.

In this embodiment, waist area gathers are formed in the ventral area F and the dorsal area R. As shown in FIG. The waist gathers include an outer body 10 and a plurality of waist gather forming elastic members 13 fixed to the outer body 10 . The plurality of elastic members 13 extend in the width direction Y and are intermittently arranged in the longitudinal direction X. As shown in FIG. The waist gathers fix the elastic member 13 between the outer layer sheet 11 and the inner layer sheet 12 of the exterior body 10 in a state of being stretched in the width direction Y, and then release the elastic member 13 from the stretched state. It is made by Thereby, the exterior body 10 can exhibit stretchability in the width direction Y. As shown in FIG. Further, when the diaper 1 is worn, the contraction of the elastic member 13 forms the substantially continuous annular gathers around the waist over the entire circumference of the diaper 1 .

In this embodiment, leg gathers are formed at the leg edges forming the opening edges of the pair of leg openings LH, LH. The leg gather includes an outer body 10 and leg gather-forming elastic members 14 fixed to the outer body 10 . The leg gathers are produced 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, contraction of the elastic member 14 forms the substantially continuous annular leg gathers over the entire circumference of the opening edge of the leg opening LH. The number of elastic members 14 may be one or plural.

The two sheets 11 and 12 forming the exterior body 10 may be sheets of the same type, or may be sheets of a different type. The sheets 11 and 12 may have stretchability, particularly stretchability in the width direction Y. As the sheets 11 and 12, nonwoven fabrics produced by various methods can be used. Laminated nonwoven fabrics with more than one layer may be mentioned. Also, the sheets 11 and 12 may be composite sheets in which these nonwoven fabrics and films are laminated together.

As shown in FIG. 2, in the maximum stretched state of the absorbent article (diaper 1), the leakage-preventing cuff forming elastic member 83 included in the inner leakage-preventing cuff 8 and the outer leakage-preventing cuff included in the outer leakage-preventing cuff 9 The forming elastic members 93 are preferably arranged so as not to intersect with each other. In this embodiment, the outer leak-proof cuff 9 is positioned on both sides of the inner leak-proof cuff 8 in the width direction Y so that the two leak-proof cuffs 8, 9 do not overlap each other when the diaper 1 is in the maximum stretched state. With such a configuration, the inner leak-proof cuff 8 and the outer leak-proof cuff 9 stand up independently and can be easily brought into close contact with the wearer's skin, thereby further preventing leakage of excrement. improves.

As materials for various elastic members in the diaper 1, unless otherwise specified, various known elastic materials commonly used in absorbent articles of this type can be used without particular limitation. Examples thereof include synthetic rubbers such as styrene-butadiene, butadiene, isoprene and neoprene, natural rubbers, EVA, elastic polyolefins, and polyurethanes. The shape of each elastic member is independent of each other, and the cross section is rectangular, square, circular, polygonal, etc., in the form of thread (such as thread rubber) or band (such as flat rubber), or multifilament type thread. can be preferably used.

As shown in FIG. 4, the outer leak-proof cuff 9 has a free end including a second base end portion 91, which is an upright end, and a free end of the second upright portion 92, similar to the form of the inner leak-proof cuff 8. It is preferable that the free end portion of the second standing portion 92 including the elastic member 93 protrude outward in the width direction Y in the relaxed state of the absorbent article. By having such a configuration, the portion of the outer leak-proof cuff 9 that protrudes outward in the width direction Y can be brought into surface contact with the wearer's skin. Leakage of the excreted liquid that has unintentionally flowed out from the inner leak-proof cuff 8 can be reduced more effectively.

As shown in FIG. 4 , the outer leak-proof cuff 9 has a width direction Y at a second bent portion 9 f extending along the longitudinal direction X between the second base end portion 91 and the free end of the second upright portion 92 . It is bent outward to be divided into a second lower region 9b located on the second base end portion 91 side and a second upper region 9u located on the free end side of the second upright portion 92 . This form is similarly applicable to the forms shown in FIGS.

In the relaxed state of the diaper 1 , the outer leak-proof cuff 9 bent at the second bent portion 9 f is located at least in the crotch region M so that the second bent portion 9 f is wider in the width direction Y than the free ends of the second upright portions 92 . located inward. The elastic member 93 is arranged at a portion projecting outward in the width direction Y in the second upper region 9u. Therefore, in the relaxed state of the diaper 1, the outer leak-proof cuff 9 is bent at the second bent portion 9f, and the free end of the second upright portion 92 protrudes outward in the width direction Y. As shown in FIG. Both the second lower region 9b and the second upper region 9u extend along the longitudinal direction X and are substantially rectangular in plan view.

The diaper 1 in each of the above-described embodiments has been described as a form in which the absorbent body 5 is not provided with a stretchable region, but if necessary, the absorbent body 5 may be provided with an elastic member or the like. may be configured to have elasticity.
As such a form, for example, a pair of side elastic members for facilitating standing up of the width direction both sides of the absorbent body 5 are stretched on both side edges along the longitudinal direction X of the absorbent core 6 in the absorbent body 5. A form arranged in a state can be mentioned. Such side elastic members are preferably arranged at least in the crotch region M, and more preferably both ends of the side elastic members extend to both edges in the longitudinal direction X of the absorbent core 6 and are ventral region F. , the crotch region M and the back region R. At least both ends of the side elastic members are fixed to at least the absorbent body 5 by a known fixing method such as an adhesive. One side elastic member or a plurality of side elastic members may be provided.
Since the side elastic members are fixed in a stretched state on both sides of the absorbent body 5 in the width direction Y, when the diaper 1 is worn, both sides of the absorbent body 5 in the width direction Y are attached to the wearer's skin. Stand up to the side. The standing portion can block the movement of the body fluid in the width direction Y, thereby preventing side leakage of the body fluid.

It is preferable that the absorbent core 6 has bending guide portions extending along the longitudinal direction X at inner positions of both sides in the width direction Y thereof. The bending guide portion is a portion that functions as a flexible shaft when the width direction side portions of the absorbent core 6 stand up toward the wearer's skin in the relaxed state of the diaper. It is the same part as the standing starting point of the body 5 . The bending guide portion can be formed, for example, by configuring the absorbent core 6 so that there is a rigidity difference or a density difference. As a result, the uprightness of the absorbent body 5 can be enhanced, the movement of the excreted liquid in the width direction can be reduced, and the liquid absorption performance can be further enhanced.

The diaper 1 having the preferred embodiment described above further enhances the fit and flexibility of the absorbent article when worn, thereby reducing discomfort such as stiffness when worn.

In the diaper 1 of the above-described embodiment, the exterior body 10 is formed separately into an abdominal exterior body and a dorsal exterior body. It may be in a form continuously extending from the dorsal region R to the dorsal region R.

From the viewpoint of enhancing the bendability of the inner leak-proof cuff 8 and further improving the fit to the wearer, one or more Preferably, a second leak-proof cuff-forming elastic member is further arranged. In this case, the second leak-preventing cuff-forming elastic member is arranged to extend along the longitudinal direction X, and is fixed between a pair of opposing leak-preventing cuff-forming sheets 80 in a stretched state by a fixing method such as an adhesive. Fixed. The second leak-proof cuff-forming elastic member is preferably arranged at least in the crotch region M. As shown in FIG.

Although the present invention has been described based on the embodiments, the present invention is not limited to the above embodiments and can be modified as appropriate. Moreover, all of the embodiments described above can be used in combination with each other as appropriate.

The following absorbent articles are further disclosed regarding the embodiment mentioned above.
<1>
An absorbent body having a longitudinal direction corresponding to the front-rear direction of a wearer and a width direction perpendicular to the longitudinal direction, and comprising a topsheet, a backsheet and an absorbent body, and a leak-proof cuff extending in the longitudinal direction. an article,
The leak-proof cuffs have a pair of inner leak-proof cuffs extending along the longitudinal direction and stretchable in the longitudinal direction, and an outer leak-proof cuff extending along the longitudinal direction and stretchable in the longitudinal direction,
Each of the leak-proof cuffs has a pair of opposing nonwoven fabrics and an elastic member arranged in a stretched state between the nonwoven fabrics to extend along the longitudinal direction,
In a plan view of the absorbent article in the maximum stretched state, the inner leak-proof cuff has a region overlapping the absorbent body on each of the skin-facing surface and the non-skin facing surface of the absorbent body,
The inner leak-proof cuff further comprises a liquid-impermeable sheet,
The liquid-impermeable sheet is
It is arranged on the inner leak-preventing cuff so as to be located in at least a part of the region where the inner leak-preventing cuff and the skin-facing surface of the absorbent body overlap in plan view in the maximum stretched state of the absorbent article. Along with being
It is arranged on the inner leak-proof cuff so as to be positioned over the entire region where the inner leak-proof cuff and the non-skin facing surface of the absorbent body overlap in a plan view of the absorbent article in the maximum stretched state. , absorbent articles.

<2>
In a plan view of the absorbent article in the maximum stretched state, the liquid-impermeable sheet is arranged so as to overlap the absorbent body on each of the skin-facing surface and the non-skin-facing surface of the absorbent body. The absorbent article according to <1>.
<3>
The absorbent article according to <1> or <2> above, wherein standing-up inhibiting portions, which are portions of the nonwoven fabric that are inhibited from standing up, are formed at both ends in the longitudinal direction of the inner leak-proof cuff.
<4>
The outer leak-proof cuff is arranged on the non-skin facing side of the absorbent main body,
The absorbent article according to any one of <1> to <3>, wherein the back sheet is arranged between the inner leak-proof cuff and the outer leak-proof cuff.
<5>
The liquid-impermeable sheet has a first liquid-impermeable sheet arranged on the inner leak-proof cuff and a second liquid-impermeable sheet extending from both ends of the back sheet in the width direction,
In a cross-sectional view of the absorbent article in the maximum stretched state, the end portion of the second liquid-impermeable sheet is positioned more outward in the width direction than the inner end portion in the width direction of the first liquid-impermeable sheet. The absorbent article according to any one of <1> to <4>.

<6>
In plan view in the maximum stretched state of the absorbent article, the length W1 in the width direction of the portion where each liquid-impermeable sheet overlaps in plan view is independently preferably 1 mm or more, more preferably 5 mm or more. and
The absorbent article according to <5> above, wherein the length W1 is preferably 50 mm or less, more preferably 30 mm or less.
<7>
The absorbent article according to <5> or <6>, wherein each liquid-impermeable sheet is independently arranged at least in the crotch region.
<8>
Each liquid-impermeable sheet extends to both edges in the longitudinal direction, and is arranged continuously in the abdominal area, the crotch area and the dorsal area, according to <5> to <7>. Absorbent article according to any one.
<9>
The absorbent article according to any one of <5> to <8>, wherein all of the first liquid-impermeable sheet is disposed between the nonwoven fabrics of the inner leak-proof cuff.

<10>
The liquid-impermeable sheet has a first liquid-impermeable sheet arranged on the inner leak-proof cuff and a second liquid-impermeable sheet extending from both ends of the back sheet in the width direction,
The absorbent article according to any one of <1> to <9> above, wherein the second liquid-impermeable sheet is integrally formed so as to extend outward in the width direction from the backsheet.
<11>
The inner leak-proof cuff does not have a bent portion formed by bending the free end portion outward in the width direction between the base end portion serving as the standing end and the free end portion including the free end,
The end portion of the second liquid-impermeable sheet is arranged so as to be positioned further outward in the width direction than the end portion positioned on the inner side in the width direction of the first liquid-impermeable sheet,
The end of the first liquid-impermeable sheet located on the outer side in the width direction reaches the region of the inner leak-proof cuff where the elastic member is arranged, and reaches the free end of the inner leak-proof cuff. The absorbent article according to <10> above, which is arranged so as not to
<12>
The inner leak-proof cuff has a bent portion formed by bending the free end portion outward in the width direction between a base end portion serving as an upright end and a free end portion including the free end,
The end portion of the second liquid-impermeable sheet is arranged so as to be positioned further outward in the width direction than the end portion positioned on the inner side in the width direction of the first liquid-impermeable sheet,
<10>, wherein the end portion of the first liquid-impermeable sheet positioned on the outer side in the width direction is positioned on the inner side in the width direction of the region of the inner leak-proof cuff where the elastic member is arranged; The absorbent article described.

<13>
The inner leak-proof cuff has a bent portion formed by bending the free end portion outward in the width direction between a base end portion serving as an upright end and a free end portion including the free end,
The position of the end of the second liquid-impermeable sheet overlaps the position of the end located on the inner side in the width direction of the first liquid-impermeable sheet in plan view, or the position of the end of the first liquid-impermeable sheet The absorbent article according to <10> above, which is positioned inward in the width direction from the end portion positioned inward in the width direction.
<14>
The inner leak-proof cuff has a bent portion formed by bending the free end portion outward in the width direction between a base end portion serving as an upright end and a free end portion including the free end,
In the relaxed state of the diaper, the first liquid-impermeable sheet is arranged so as to have an exposed portion on the inner surface in the width direction of the inner leak-proof cuff,
The absorbent article according to <10> above, wherein the first liquid-impermeable sheet has a portion disposed between the nonwoven fabrics at the free end of the inner leak-proof cuff.
<15>
The inner leak-proof cuff has a bent portion formed by bending the free end portion outward in the width direction between a base end portion serving as an upright end and a free end portion including the free end,
In the relaxed state of the diaper, the first liquid-impermeable sheet is arranged so as to have an exposed portion on the inner surface in the width direction of the inner leak-proof cuff,
The absorbent article according to <10> above, wherein the first liquid-impermeable sheet has a portion not disposed between the nonwoven fabrics at the free end of the inner leak-proof cuff.

<16>
The liquid-impermeable sheet configured to extend outward in the width direction from the back sheet is arranged between the non-woven fabrics of the inner leak-proof cuffs,
<1> to the above, wherein the liquid-impermeable sheet in one of the inner leak-proof cuffs and the liquid-impermeable sheet in the other inner leak-proof cuff are integrated via the back sheet; The absorbent article according to any one of <4>.
<17>
The absorbent article according to <16>, wherein each of the liquid-impermeable sheets is arranged between the nonwoven fabrics of the inner leak-proof cuff.
<18>
The absorbent article according to any one of <1> to <17>, wherein the inner leakage-preventing cuff is formed of nonwoven fabrics that are folded in half along the longitudinal direction and face each other.
<19>
The absorbent article according to any one of <1> to <17>, wherein the inner leak-proof cuff is formed by arranging two sheets of the nonwoven fabric facing each other.

<20>
The absorbent article according to any one of <1> to <19>, wherein the liquid-impermeable sheet has a portion disposed between the nonwoven fabrics of the inner leak-proof cuff.
<21>
The inner leak-proof cuff has a base end serving as an upright end and a free end,
The absorbent article according to any one of <1> to <20>, wherein the free end has a portion where the liquid-impermeable sheet does not exist.
<22>
The absorbent article according to <21> above, which has a region where the liquid-impermeable sheet does not exist in an end region including the free end of the free end.
<23>
An end region including a free end of the inner leak-proof cuff is formed at least in the crotch region, has a predetermined width inward in the width direction from the free end, and extends in the longitudinal direction. The absorbent article according to <22>.

<24>
The inner leak-proof cuff has a base end serving as an upright end, a free end including a free end, and a bent portion positioned between the base end and the free end and extending in the longitudinal direction,
<1> to <23>, wherein the bent portion is bent outward in the width direction and divided into a lower area located on the base end side and an upper area located on the free end side. Absorbent article according to any one.
<25>
The absorbent article according to <24>, wherein one or more elastic members are arranged in a stretched state between nonwoven fabrics in an intermediate region between the base end portion and the free end of the inner leak-proof cuff. .
<26>
The absorbent article according to <24> or <25>, wherein the free end portion of the inner leak-proof cuff protrudes outward in the width direction when the absorbent article is in a relaxed state.
<27>
The elastic member of the inner leak-proof cuff is arranged at a portion of the upper region that protrudes outward in the width direction,
The absorbent article according to <26> above, wherein the upper region is formed to have stretchability in the longitudinal direction.

<28>
The liquid-impermeable sheet has a first liquid-impermeable sheet arranged on the inner leak-proof cuff and a second liquid-impermeable sheet extending from both ends of the back sheet in the width direction,
The absorbent article according to any one of <24> to <27>, wherein the upper region has a portion where the first liquid-impermeable sheet is arranged between the nonwoven fabrics of the inner leak-proof cuff.
<29>
The elastic members of the inner leak-preventing cuff and the elastic members of the outer leak-preventing cuff are arranged so as not to cross each other when the absorbent article is stretched to the maximum. 28>.
<30>
The outer leak-proof cuff has a second base end serving as an upright end and a second free end including a free end,
The absorbent article according to any one of <1> to <29> above, wherein the second free end portion is formed to protrude outward in the width direction when the absorbent article is in a relaxed state.

<31>
The absorber according to any one of <1> to <30>, further comprising an elastic member arranged at least in the crotch region, and configured to have stretchability. absorbent article.
<32>
The absorbent body comprises an absorbent core,
<1> to the above, wherein a pair of side elastic members are arranged in a stretched state on both side edges along the longitudinal direction of the absorbent core, whereby the absorbent body is configured to have elasticity. The absorbent article according to any one of <31>.
<33>
The absorbent body comprises an absorbent core,
The absorptive core has bending guide portions extending along the longitudinal direction X at inner positions of both sides thereof in the width direction Y,
The bending guide portion functions as a flexible shaft when the widthwise side portions of the absorbent core 6 stand up toward the wearer's skin in the relaxed state of the absorbent article. The absorbent article according to any one of <1> to <32>.

1 Pants-type disposable diaper (absorbent article)
2 Absorbent main body 3 Top sheet 4 Back sheet 5 Absorber 8 Inner leak-proof cuff 85 Liquid-impermeable sheet 9 Outer leak-proof cuff 10 Exterior body X Longitudinal direction Y Width direction F Abdominal area M Inseam area R Back area

Claims (7)

An absorbent body having a longitudinal direction corresponding to the front-rear direction of a wearer and a width direction perpendicular to the longitudinal direction, and comprising a topsheet, a backsheet and an absorbent body, and a leak-proof cuff extending in the longitudinal direction. an article,
The leak-proof cuffs have a pair of inner leak-proof cuffs extending along the longitudinal direction and stretchable in the longitudinal direction, and an outer leak-proof cuff extending along the longitudinal direction and stretchable in the longitudinal direction,
Each of the leak-proof cuffs has a pair of opposing nonwoven fabrics and an elastic member arranged in a stretched state between the nonwoven fabrics to extend along the longitudinal direction,
In a plan view of the absorbent article in the maximum stretched state, the inner leak-proof cuff has a region overlapping the absorbent body on each of the skin-facing surface and the non-skin facing surface of the absorbent body,
The inner leak-proof cuff further comprises a liquid-impermeable sheet,
The liquid-impermeable sheet is
It is arranged on the inner leak-preventing cuff so as to be located in at least a part of the region where the inner leak-preventing cuff and the skin-facing surface of the absorbent body overlap in plan view in the maximum stretched state of the absorbent article. Along with being
It is arranged on the inner leak-proof cuff so as to be positioned over the entire region where the inner leak-proof cuff and the non-skin facing surface of the absorbent body overlap in a plan view of the absorbent article in the maximum stretched state. , absorbent articles. The outer leak-proof cuff is arranged on the non-skin facing side of the absorbent main body,
2. The absorbent article according to claim 1, wherein the backsheet is disposed between the inner leak-proof cuff and the outer leak-proof cuff. The liquid-impermeable sheet has a first liquid-impermeable sheet arranged on the inner leak-proof cuff and a second liquid-impermeable sheet extending from both ends of the back sheet in the width direction,
In a cross-sectional view of the absorbent article in the maximum stretched state, the end portion of the second liquid-impermeable sheet is positioned more outward in the width direction than the inner end portion in the width direction of the first liquid-impermeable sheet. The absorbent article according to claim 1 or 2. 4. The absorbent article according to any one of claims 1 to 3, wherein the inner leak-proof cuff is formed of nonwoven fabrics that are folded in two along the longitudinal direction and face each other. 5. The absorbent article according to claim 4, wherein the liquid-impermeable sheet has a portion disposed between the nonwoven fabrics of the inner leak-proof cuff. The inner leak-proof cuff has a base end serving as an upright end and a free end,
The absorbent article according to any one of claims 1 to 5, wherein the free end has a portion where the liquid-impermeable sheet does not exist. The inner leak-proof cuff has a base end serving as an upright end, a free end including a free end, and a bent portion positioned between the base end and the free end and extending in the longitudinal direction,
7. The body according to any one of claims 1 to 6, wherein the bent portion is bent outward in the width direction to be divided into a lower area located on the base end side and an upper area located on the free end side. Absorbent article according to the paragraph.

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