JP7409985B2 - absorbent articles - Google Patents

Description

The present invention relates to absorbent articles.

BACKGROUND ART In absorbent articles such as disposable diapers, it is known that a side leak prevention member, also called a leak prevention cuff, a three-dimensional gather, a three-dimensional guard, etc., is provided on the side facing the skin. Typically, a pair of side leakage prevention members are arranged on both sides of the wearer in a direction corresponding to the wearer's front and rear direction, and when the absorbent article is worn, they stand up toward the wearer's skin and prevent urine leakage. It dams up excreta such as stool and feces to prevent side leakage.

The present applicant proposed a disposable diaper including a leak-proof cuff having a plurality of elastic members (Patent Document 1). This leak-proof cuff is folded by being bent at at least two bending portions between the free end and the fixed end. This allows the width of the crotch area to be narrowed while suppressing a drop in leak-proof performance.

Further, Patent Document 2 discloses that, in order to improve the adhesion of the leak-proof cuff, in the leak-proof cuff, contraction approaches from the base end side to the free end as it goes from both ends in the longitudinal direction to an intermediate position in the longitudinal direction. An absorbent article is disclosed that is provided with elastic contraction means that define a line of action.

Further, Patent Document 3 discloses that in the unfolded state of the article, an elastic member in a first leak prevention cuff and an elastic member in a second leak prevention cuff are A diaper is disclosed in which the distance between the diaper and the member in the width direction of the article narrows from the rear of the article toward the front of the article.

Japanese Patent Application Publication No. 2005-198802 Japanese Patent Application Publication No. 2001-252308 Special Publication No. 2006-520250

Absorbent articles such as disposable diapers may slip downward during wear due to the mass of the article itself and the mass of excrement absorbed. The cuff may not adhere sufficiently to the wearer's body, resulting in poor fit. As a result, side leakage of excrement may occur.
Although the absorbent articles of Patent Documents 1 to 3 have good adhesion to the wearer's body of the leak-proof cuff arranged in the crotch area and its surroundings, the adhesion to the wearer's body is further improved. There was room for improvement in this respect.

Therefore, the present invention relates to an absorbent article that improves the fit in the wearer's crotch area.

The present invention is an absorbent article having a vertical direction corresponding to the front-back direction of a wearer and a horizontal direction orthogonal to the vertical direction, and having a pair of leak-proof cuffs extending in the vertical direction provided on the skin-facing surface. hand,
Each of the leak-proof cuffs has a proximal end serving as an upright end of the leak-proof cuff, a free end, and a bent part located between the proximal end and the free end and extending in the longitudinal direction. have,
Each of the leak-proof cuffs has a lower part located between the base end part and the bent part, and an outer part located between the bent part and the free end part and projecting outward in the lateral direction. It is divided into an overhanging part,
The outward projecting portion includes a plurality of elastic members extending in the vertical direction and arranged in a stretched state;
In a natural state, the width along the horizontal direction in the longitudinally central region of the outwardly projecting portion is smaller than the width along the horizontal direction in the longitudinally front region and the longitudinally rear region;
At least in the central region in the longitudinal direction, at least a portion of each elastic member in the longitudinal direction is fixed to the outward projecting portion, and in the region where the elastic member is fixed, the elastic members are adjacent to each other along the lateral direction. The present invention provides an absorbent article in which the above-mentioned matching elastic members are arranged in parallel at intervals.

ADVANTAGE OF THE INVENTION According to this invention, the absorbent article which is excellent in the fit property in a wearer's crotch area is provided.

FIG. 1 is a schematic perspective view of a disposable diaper in its natural state, which is an embodiment of the absorbent article of the present invention. FIG. 2 is a schematic cross-sectional view (corresponding to line II) of the diaper in the natural state shown in FIG. 1, taken along the horizontal direction in the central region in the longitudinal direction. FIG. 3 is a schematic cross-sectional view (corresponding to the II-II line) of the diaper in the natural state shown in FIG. 1, taken along the horizontal direction in the rear region in the longitudinal direction. FIGS. 4(a) and 4(b) are enlarged views of essential parts in a cross section taken in the lateral direction, showing an embodiment of the leak-proof cuff of the diaper in the natural state shown in FIG. 1. FIG. FIG. 5 is a schematic plan view of the design dimensions of the outwardly projecting portion of the leak-proof cuff. FIG. 6 is an enlarged view of a main part of a cross section taken in the lateral direction, showing an example of the embodiment of the leak-proof cuff of the diaper shown in FIG. 2. FIG.

The present invention will be described below based on preferred embodiments thereof with reference to the drawings. 1 to 3 show an expandable disposable diaper (hereinafter also simply referred to as a "diaper") which is a preferred embodiment of the absorbent article of the present invention.

A diaper 1 schematically shown in FIG. 1 has a vertical direction have. The central region in the longitudinal direction X includes an excretory part facing part (not shown) that is arranged to face the excretory part of the wearer when the diaper 1 is worn. The central region in the longitudinal direction It is located in Each region extends continuously in the front-back direction of the wearer.

In this specification, the "natural state" of the diaper means a state in which no external force is applied to the diaper (relaxed state). Specifically, the length of the elastic member disposed in the leak-proof cuff in the vertical direction X is the shortest.
Furthermore, when focusing on a diaper or its constituent parts, the "skin-facing surface" is the surface that faces the wearer's skin when the diaper is worn, and the "non-skin-facing surface" is the surface that faces the wearer's skin when the diaper is worn. This is the side facing away from the . That is, the skin-facing surface is a surface relatively close to the wearer's skin, and the non-skin-facing surface is a surface relatively far from the wearer's skin. "When worn" and "wearing state" refer to a state in which the diaper is worn while maintaining a proper wearing position.

FIG. 2 is a schematic diagram of a cross section along the horizontal direction Y in the central region of the longitudinal direction X of the diaper 1 in a natural state. FIG. 3 is a schematic diagram of a cross section along the horizontal direction Y in the longitudinal direction X rear region of the diaper 1 in a natural state. In FIG. 3, for convenience of explanation, a cross section along the horizontal direction Y in the longitudinal direction X rear region of the diaper 1 is taken as an example. It has the same configuration as the longitudinal direction X rear region. Therefore, the description regarding the longitudinal direction X rear region of the diaper 1 also applies to the longitudinal direction X front region of the diaper 1, unless otherwise specified.

As shown in FIGS. 2 and 3, the diaper 1 includes an absorbent main body 2. As shown in FIGS. The absorbent main body 2 includes a top sheet 21 disposed on the skin-facing surface side, a back sheet 22 disposed on the non-skin-facing surface side, and an absorbent material interposed between the top sheet 21 and the back sheet 22. A body 23 is provided. The top sheet 21, the back sheet 22, and the absorbent body 23 are constructed by integrating them using known bonding means such as adhesive. The absorbent core 23 includes a liquid-retentive absorbent core 24 containing a water-absorbing material, and a core wrap sheet 25 that covers the outer surface of the absorbent core 24. The absorbent body 23 of this embodiment has a rectangular shape in plan view, and is arranged so that its longitudinal direction coincides with the longitudinal direction X of the diaper 1.

As the top sheet 21, the back sheet 22, and the absorbent core 23, various materials conventionally used in this type of absorbent article can be used without particular limitation. As the top sheet 21, for example, a liquid-permeable nonwoven fabric having a single layer or multilayer structure or an apertured film can be used. As the back sheet 22, a sheet that is liquid-impermeable or hardly liquid-permeable can be used, and for example, a moisture-permeable resin film or a laminate of a resin film and a nonwoven fabric can be used. The absorbent core 24 constituting the absorbent body 23 may be, for example, a fiber stack made of a water-absorbing material such as wood pulp or a water-absorbing polymer, or a sheet-like absorbent structure containing the water-absorbing material. Can be used. As the core wrap sheet 25 constituting the absorber 23, a sheet having liquid permeability can be used, and for example, paper or nonwoven fabric can be used.

The diaper 1 shown in FIGS. 1 to 3 includes a pair of leak-proof cuffs 3, 3 spaced apart in the lateral direction Y on its skin-facing surface. The leak-proof cuffs 3 are arranged so as to extend in the vertical direction X, respectively. The leak-proof cuff 3 includes at least a plurality of elastic members 37 extending in the longitudinal direction X, and preferably includes a cuff-forming sheet 30 that is a sheet material for forming the leak-proof cuff. The cuff forming sheet 30 is made of a non-stretchable sheet material such as non-woven fabric.

The diaper 1 of this embodiment includes a pair of side flap portions 4, 4 extending outward in the lateral direction Y from both side edges of the absorbent body 23 along the longitudinal direction X. In the embodiment shown in FIG. 2, the topsheet 21 covers the entire skin-facing surface of the absorbent core 23, and the backsheet 22 covers the entire non-skin-facing surface of the absorbent core 23. Both sheets 21 and 22 extend outward in the lateral direction Y from both side edges of the absorbent body 23 along the longitudinal direction X, and together with the cuff forming sheet 30 constitute the side flap portion 4. In other words, the side flap portion 4 is located laterally outward of the absorbent body 23 and in a region where the absorbent body 23 is not arranged, and includes the top sheet 21, the back sheet 22, and the cuff forming sheet 30. ing. These plurality of members constituting the side flap portion 4 are joined to each other by known joining means such as adhesive, heat sealing, ultrasonic sealing, or the like.

A plurality of leg elastic members 42 are disposed in an extended state along the longitudinal direction X on each of both sides of the side flap portion 4 of the diaper 1 along the longitudinal direction X. Leg gathers can be formed by contraction of the leg elastic members 42. The leg elastic members 42 are arranged at intervals in the horizontal direction Y at least in the central region in the vertical direction.

As shown in FIG. 1, in the diaper 1 of this embodiment, a pair of fastening tapes 7, 7 are provided in the rear region in the longitudinal direction X. Each fastening tape 7 is arranged so as to extend from both side edges in the width direction Y of the side flap portion 4 located in the rear region in the longitudinal direction X. One end of each fastening tape 7 is fixed between the back sheet 22 and the cuff forming sheet 30.

As shown in FIG. 1, on the non-skin-facing surface of the diaper 1 in the longitudinal direction It is provided. An appropriate material for the landing tape 72 is selected depending on the material of the fastening portion 71 of the fastening tape 7. For example, when the fastening part 71 is a male material of a mechanical fastener, the landing tape 72 can be a fiber sheet that can be engaged with the male material, such as a knitted fabric or a nonwoven fabric, as the female material of the mechanical fastener. . Further, when the fastening portion 71 is made of adhesive, the landing tape 72 may be, for example, a smooth film made of synthetic resin.

As described above, the diaper of the present invention includes a pair of leak-proof cuffs 3, 3. Each leak-proof cuff 3 preferably includes a cuff-forming sheet 30. Each cuff forming sheet 30 is arranged so as to straddle the side edge of the absorbent body 23 in the lateral direction Y. Details of the constituent materials of the leak-proof cuff 3 and the cuff-forming sheet 30 will be described later.

As shown in FIGS. 2 and 3, the cuff forming sheet 30 includes a base end portion 31 extending in the longitudinal direction X over substantially the entire length of the sheet 30 in the longitudinal direction X, and a free end portion 32. The base end portion 31 is a fixed portion fixed to a member other than the cuff forming sheet 30. The free end portion 32 is a portion that is not fixed to any member other than the cuff forming sheet 30. The leak-proof cuff 3 is configured to stand up on the wearer's skin side, with the innermost position in the lateral direction Y at the base end 31 serving as the upright end. The base end portion 31 and the free end portion 32 are preferably arranged at least in the central region in the longitudinal direction X, and may be arranged in the entire region along the longitudinal direction X. Note that the entire length in the longitudinal direction X in this specification means a region including all of the front region, the central region, and the rear region, and is a different concept from "total length" which refers to the length in the longitudinal direction X. Note that both the base end portion 31 and the free end portion 32 may be arranged along the entire length in the vertical direction X. The other member mentioned above is typically a member disposed on the non-skin facing side of the cuff forming sheet 30 so as to be able to come into contact with the sheet 30, and the other member in this embodiment is the top sheet 21. be.

The base end portion 31 is typically formed using a known bonding means such as an adhesive such as hot melt or heat fusion. As shown in FIGS. 2 and 3, the base end portion 31 is located outward in the horizontal direction Y from the side edge of the absorber 23 along the vertical direction X.

As shown in FIGS. 2 and 3, each leak-proof cuff 3, 3 has a bent portion 35 located between a proximal end 31 and a free end 32. As shown in FIGS. The bent portion 35 can be located, for example, approximately at the center of each leak-proof cuff 3, 3 in the width direction X. Alternatively, the bent portion 35 can be positioned offset from the lateral center of the leak-proof cuff 3 toward the free end 32, or conversely, the bent portion 35 can be positioned offset from the lateral center of the leak-proof cuff 3 toward the proximal end 31. It can also be located. The bent portion 35 extends in the vertical direction X, and in this embodiment is formed by bending the cuff forming sheet 30 outward in the horizontal direction Y between the base end portion 31 and the free end portion 32. By forming the bent portion 35, each leak-proof cuff 3, 3 has a lower portion 3A located between the proximal end portion 31 and the bent portion 35, and a portion between the bent portion 35 and the free end portion 32. It is divided into an outward projecting portion 3B located at . The outward projecting portion 3B projects outward from the position of the bent portion 35 in the horizontal direction Y, and is formed over the entire length of the leak-proof cuff 3 in the vertical direction X.

The outwardly projecting portion 3B in this embodiment has a two-layer structure in which one continuous cuff forming sheet 30 is bent in the lateral direction Y to form two opposing surfaces. One surface of the outwardly projecting portion 3B formed by bending the cuff forming sheet 30 forms a contact surface that makes surface contact with the wearer's skin.

In addition to the cuff-forming sheet 30, the leak-proof cuff 3 includes a plurality of elastic members 37 extending in the longitudinal direction X and arranged in a stretched state. Specifically, a plurality of thread-like or band-like elastic members 37 are disposed on the outwardly projecting portion 3B of the leak-proof cuff 3. A plurality of elastic members 37 are arranged in the horizontal direction Y so as to be expandable and contractible in the vertical direction X. The elastic members 37 are arranged at least in the central region in the longitudinal direction X of the diaper 1, and are respectively fixed to the outwardly projecting portions 3B in at least the central region in the longitudinal direction X. In some cases, the elastic member 37 extends to the longitudinal direction X front region and rear region as well as the longitudinal direction X central region. At least a portion of each elastic member 37 in the longitudinal direction is fixed to the outer projecting portion 3B in at least the central region in the longitudinal direction X of the diaper 1. In some cases, each elastic member 37 is fixed to the outer projecting portion 3B not only in the central region in the longitudinal direction but also in the front region and the rear region in the longitudinal direction.
The manner in which each elastic member 37 is fixed is, for example, intermittently fixed at a plurality of locations in the longitudinal direction in the central region of the vertical direction X, or continuously fixed within a predetermined length range in the central region in the vertical direction. In addition, there is also an aspect in which it is fixed at a site other than the center region in the vertical direction X. In the case of the former fixed mode, the elastic member 37 can be expanded and contracted in the vertical direction X between the fixed parts at least in the central region in the vertical direction X. In the case of the latter fixing mode, the elastic member 37 can be expanded and contracted in the vertical direction X between at least a portion fixed in the central region in the vertical direction It has become.
In either case, the elastic members 37 are arranged so that adjacent elastic members 37 in the width direction Y are spaced apart and parallel to each other in the portion where the elastic members 37 are fixed.

In this specification, the "parallel state" refers to a first imaginary line along the extending direction of an arbitrary elastic member 37 and an adjacent elastic member 37 in a region where the elastic member 37 is fixed. The second imaginary lines along the extension direction do not intersect with each other (“parallel” in the strict sense), and the angle between the first imaginary line and the second imaginary line is within 2°, preferably within 1°. It encompasses both of being.
Generally, if the dimensions of an absorbent article such as a diaper are designed so that the elastic members 37 are arranged parallel to each other along the longitudinal direction It is generally placed. However, in actual manufacturing, a slight deviation may occur in the arrangement position of the elastic member 37. Therefore, the term "parallel state" means allowing deviation within the range in which the effects of the present invention can be achieved. However, it is also preferable that the elastic member 37 be in a state parallel to the imaginary line along the longitudinal direction X at the portion where the elastic member 37 is fixed.
When determining and measuring the arrangement and dimensions of the elastic member 37 from the absorbent article that is the product, the design dimensions (stretch the elastic member to the maximum and eliminate any effects such as expansion and contraction of the elastic member or bending of the constituent members) (dimensions when the absorbent article is spread out into a flat shape).

In the diaper 1 in its natural state, the width of the outward projecting portion 3B of the leak-proof cuff 3 along the lateral direction Y is different between the central region in the longitudinal direction X and the other regions in the longitudinal direction X. Specifically, the width of the outer projecting portion 3B along the lateral direction Y in the longitudinal direction X center region of the diaper 1 is smaller than the width along the lateral direction Y in the longitudinal direction X front region and the longitudinal direction It has become. With such a configuration, the leak-proof cuff can be more easily brought into close contact with the wearer's crotch area, and the fit of the diaper can be improved. When viewed from the central portion in the longitudinal direction X along the longitudinal front region and the rear region, the width of the outward projecting portion 3B in the lateral direction Y may increase continuously or in a stepwise manner. You may do so.

In the natural state of the diaper, the length W1 (see FIG. 2) of the outward projecting portion 3B along the horizontal direction Y in the longitudinal direction X central region is preferably 4 mm or more, more preferably 9 mm or more, and preferably 24 mm or less. , more preferably 19 mm or less. The length W1 may be the same or different throughout the central region in the longitudinal direction X, provided that the above-mentioned range is satisfied. The length W1 is the length when the outward projecting portion 3B of the leak-proof cuff 3 is projected in a plane in the natural state of the diaper. Here, plane projection literally refers to projection onto a plane when the surface constituted by the outwardly projecting portion 3B is parallel to the plane (the surface on which the diaper is placed) in the diaper's natural state. If the surface formed by the outwardly extending portion 3B is not parallel to the plane (the surface on which the diaper is placed) in the diaper's natural state, the image should be projected from the normal direction of the surface formed by the outwardly extending portion 3B. means.

Further, the length W2 (see FIG. 3) along the horizontal direction Y of the outward projecting portion 3B in the longitudinal direction X front area and the longitudinal direction , preferably 5 mm or more, more preferably 10 mm or more, and preferably 25 mm or less, still more preferably 20 mm or less. The length W2 may be the same or different throughout the longitudinal direction X front region and the longitudinal direction X rear region, provided that the length W2 satisfies the above-mentioned range. Similarly to the length W1, the length W2 is the length when the surface constituted by the outwardly projecting portion 3B is projected onto a plane in the diaper's natural state.

In the natural state of the diaper, the width of the outer projecting portion 3B in the horizontal direction Y is different between the central region in the vertical direction X and the other regions in the vertical direction X, for example, as shown in FIGS. 2 to 4. As shown, in the central region of the longitudinal direction , it is sufficient that bent portions 50 and 60 different from the bent portion 35 are not formed in a region other than the central region in the longitudinal direction X.

FIG. 2 and FIGS. 4(a) and 4(b) show an embodiment of the cross-section of the leak-proof cuff 3 in the horizontal direction Y in the longitudinal direction X center region of the diaper 1. In the leakage prevention cuff 3 shown in FIGS. 2, 4(a) and 4(b), each elastic member 37 disposed on the outward projecting portion 3B is fixed in the width direction Y. Elastic members 37 adjacent to each other are arranged parallel to each other at intervals. For convenience of explanation, some of the leak-proof cuffs 3 shown in the figure are shown with different spacings along the lateral direction Y of the elastic members 37 disposed on the outwardly projecting portion 3B; The spacing between the members 37 in the lateral direction Y may be different at the portion where the elastic member 37 is fixed, as shown in the figure, or alternatively, the spacing may be the same. .

Specifically, as shown in FIG. 2, the leak-proof cuff 3 has a second bent part 50 extending in the vertical direction X, separate from the bent part 35, between the free end part 32 and the bent part 35. It is preferable that By providing the second bent portion 50 in the vertical center region of the leakage prevention cuff 3, the width along the horizontal direction Y of the outward projecting portion 3B in the vertical direction It can be made smaller than the width along. The second bent portion 50 is formed on the outwardly extending portion 3B.

The second bent portion 50 in the embodiment shown in FIG. It extends to X. The second bent portion 50 in this embodiment is located closer to the free end portion 32 with respect to the lateral center portion of the leak-proof cuff 3. The second bent portion 50 in this embodiment is formed by bending the cuff forming sheet 30 located between the free end portion 32 and the outermost elastic member 37 in the lateral direction Y. . In its natural state, the outwardly projecting portion 3B in this embodiment is located between the free end portion 32 and the second bent portion 50 in the longitudinal direction X central region of the diaper 1, with the second bent portion 50 as a flexible axis. It is also preferable that the located outer region 3S stands up toward the wearer's body side or is folded back inward in the lateral direction Y. Note that "folded inward in the lateral direction Y" refers to cases where the outer region 3S is folded back toward the skin-facing surface, and cases where the outer region 3S is folded back toward the non-skin-facing surface. This meaning includes both the case where it is folded and the case where it is folded back.

In the diaper 1 shown in FIG. 2, the outer region 3S is folded back toward the skin-facing surface. Since the outer region 3S is folded back toward the skin-facing surface side and inward in the lateral direction Y, the diaper becomes even more excellent in preventing leakage of excrement. In the outer projecting portions 3B located in the front region and the rear region in the longitudinal direction X of the diaper 1, each independently , the outer region 3S may or may not be formed.

In the longitudinal direction X center region of the diaper 1, the length of the outer projecting portion 3B including the outer region 3S along the lateral direction Y of the outer region 3S in the longitudinal direction The percentage of the length (that is, the length of the design dimension along the lateral direction Y from the second bent portion 50 to the free end portion 32) is preferably 1% or more, more preferably 2% or more, and preferably It is preferably 30% or less, more preferably 20% or less. With this range, the leak-proof cuff can be brought into closer contact with the wearer's crotch area, further improving the fit of the diaper and more effectively preventing lateral leakage of excrement. .

As another form in which the width along the horizontal direction Y of the outwardly projecting portion 3B in the longitudinally central region is made smaller than the width along the horizontal direction Y of the region other than the longitudinally central region, as shown in FIG. 4(a). , the second bent portion 50 extending in the longitudinal direction It is also preferable to be located between. The second bent portion 50 in this embodiment is formed by bending the cuff forming sheet 30 located between the adjacent elastic members 37 in the outwardly projecting portion 3B. The second bent portion 50 shown in FIG. 4(a) is formed at the center in the lateral direction Y between the free end portion 32 and the bent portion 35, and is formed between the elastic members 37. As far as possible, it may be located closer to the free end 32 with respect to the lateral center of the leak-proof cuff 3, or closer to the bent portion 35 with respect to the lateral center of the leak-proof cuff 3. good.
In its natural state, the outward projecting portion 3B in this embodiment has the second bent portion 50 as a flexible axis, and the free end portion 32 in the longitudinal direction X center region of the diaper 1 and the second bent portion It is also preferable that the outer region 3S located between the outer region 3S and the outer region 3S stands up toward the wearer's body or is folded back inward in the lateral direction Y. In the outer projecting portions 3B located in the front region and the rear region in the longitudinal direction X of the diaper 1, each independently , the outer region 3S may or may not be formed.

Further, in the outer projecting portion 3B in the central region in the longitudinal direction X, if a plurality of elastic members 37 are configured to exist in the outer region 3S, the outer projecting portion 3B is likely to come into surface contact with the skin of the wearer. This is preferable because the adhesion can be further improved. In addition, if a plurality of elastic members 37 are configured to exist in the region along the lateral direction Y between the second folded part 50 and the folded part 35, the outwardly projecting part 3B will be exposed to the wearer's skin. This is preferable because it makes it easier to make stable surface contact with the wearer, and further improves the ability to follow the wearer's movements and the adhesion to the wearer's skin. For example, as will be described later, such a configuration can reduce the elongation stress in the vertical direction This can be easily achieved by arranging a plurality of elastic members 37 so that the elongation stress in the longitudinal direction X of 37 is higher than that of the elastic members 37.

Still another form in which the width along the horizontal direction Y of the outwardly projecting portion 3B in the longitudinally central region is made smaller than the width along the horizontal direction Y of the region other than the longitudinally central region is as shown in FIG. 4(b). In addition, the leak-proof cuff 3 has a second bent part 50 and a third bent part, which respectively extend in the vertical direction It is preferable to have 60. The second bent portion 50 in this embodiment is located closer to the free end portion 32 in the lateral direction Y of the outwardly projecting portion 3B with respect to the lateral center portion of the leak-proof cuff 3. In the lateral direction Y, the third bent portion 60 is located closer to the bent portion 35 of the outward projecting portion 3B with respect to the lateral center of the leak-proof cuff 3. That is, the second bent portion 50 is located further outward in the lateral direction Y than the third bent portion 60. In the present embodiment, the second bent portion 50 is located approximately at the center between the free end portion 32 and the bent portion 35 of the outwardly projecting portion 3B, and the third bent portion 60 is located at the second bent portion. 50 and the bent portion 35. The formation positions of the second bent portion 50 and the third bent portion 60 are based on the position when the outward projecting portion 3B is maximally extended in the lateral direction Y.

When the second bent part 50 and the third bent part 60 are formed in the outward projecting part 3B, as shown in FIG. An inner region 3T located between the inner region 35 and the second bent portion 50 is formed so as to be folded back inward in the lateral direction Y. In addition, the outward projecting portion 3B has a second bent portion in which the outer region 3S located between the second bent portion 50 and the free end portion 32 is folded back outward in the lateral direction Y. Both the portion 50 and the third bent portion 60 are formed by bending the cuff forming sheet 30 located at the outwardly projecting portion 3B. In the outer projecting portions 3B located in the front region and the rear region in the longitudinal direction and an inner region 3T may or may not be formed.

The configurations related to the second bending part 50 and the third bending part 60 described above may satisfy any one of the above-mentioned configurations, or may be configured by combining the above-described configurations. In order to form the second bent portion 50 and the third bent portion 60 described above, for example, the cuff forming sheet 30 is formed so that the second bent portion 50 and the third bent portion 60 described above can be formed at predetermined positions. It is sufficient to use one that has been bent in advance and fixed at the front end and rear end in the longitudinal direction X to form a crease. Alternatively, the elongation stress in the longitudinal direction X of the elastic member 37 located on the inner side in the lateral direction Y of the outwardly projecting portion 3B is set to be higher than the elongation stress in the longitudinal direction X of the elastic member 37 located on the outer side in the lateral direction Y. It may be configured so that it is higher. Details regarding the configuration for changing the elongation stress will be described later.

The absorbent article having the above structure has an outwardly projecting part formed on the leak-proof cuff, so that the outwardly projecting part and the skin of the wearer are brought into surface contact and adhered to the wearer's entire area in the front and back direction. This can improve the fit of the absorbent article.
In addition, the plurality of elastic members constituting the leak-proof cuff are arranged in parallel at intervals along the horizontal direction Y at the fixed portion, so that at least the center of the longitudinal direction In this area, the leak-proof cuff can be fitted uniformly to the wearer's body along the front and back direction of the wearer corresponding to the longitudinal direction It is possible to prevent leakage to the side (lateral leakage).
Furthermore, the width along the horizontal direction in the longitudinally central region of the outwardly projecting portion of the leak-proof cuff is configured to be smaller than the widths along the horizontal direction in the longitudinally front region and the longitudinally rearward region. For the wearer's abdomen and back, by increasing the contact area between the outwardly protruding part and the wearer's skin, it is possible to prevent lateral leakage of excrement from the abdomen and back, and to reduce the weight of the absorbent article. The crotch area tends to sag downward due to the weight of excrement, so the height and contraction force of the leak-proof cuff can be increased to ensure a tight fit, effectively preventing lateral leakage of excrement from the crotch area.
Further, as a preferred embodiment of the present invention, the cuff forming sheet constituting the leak-proof cuff has the second bent portion or the second bent portion and the third bent portion formed in the longitudinal center region of the leak-proof cuff. The elastic members overlap in the thickness direction, and the thickness, height, and contractile force of the leak-proof cuff can be increased in the longitudinal center region of the leak-proof cuff. As a result, it is possible to further improve the adhesion of the diaper to the wearer's crotch area, and to more effectively prevent lateral leakage of excrement.
In particular, since the plurality of elastic members constituting the leak-proof cuff are arranged parallel to each other at intervals along the lateral direction Y at their fixed portions, there is a second bent portion between the adjacent elastic members. This is advantageous in that the third bent portion can be easily formed along the longitudinal direction X, and lateral leakage of excrement can be effectively prevented over a wide range along the front and back direction of the wearer.

As shown in FIG. 2, the second bent portion 50 is located between the free end portion 32 of the outwardly projecting portion 3B and the elastic member 37 disposed closest to the free end portion 32. As a result, the cuff-forming sheets overlap in the thickness direction and increase in thickness, making it easier to further improve the adhesion between the leak-proof cuff and the wearer's skin.
Further, as shown in FIG. 4(a), the second bent portion 50 extending in the longitudinal direction 37 and the elastic member 37 disposed closest to the folded portion 35, the cuff forming sheets overlap in the thickness direction and the shrinkage force is increased to prevent leakage and wear. This makes it easier to further improve the adhesion to the person's skin.
Further, as shown in FIG. 4(b), in addition to the second bending part 50, a third bending part 60 is formed, so that the cuff forming sheet and the elastic member overlap in multiple layers in the thickness direction and shrinkage. The improved force makes it easier to further improve the adhesion between the leak-proof cuff and the wearer's skin.
Among these, it is advantageous to adopt the embodiment shown in FIG. 4(b) because the adhesion between the leak-proof cuff and the wearer's skin can be significantly improved.

From the viewpoint of making the effects of the present invention more noticeable, it is preferable that the plurality of elastic members 37 disposed on the outwardly projecting portion 3B of the leak-proof cuff 3 include at least two types of elastic members 37 having different elongation stresses. . In this case, in the elastic members 37 disposed on the outwardly projecting portion 3B, the extension stress of the elastic members 37 located inward in the lateral direction Y is greater than the extension stress of the elastic members 37 located outward in the lateral direction Y. It is also preferable that it is high. The arrangement position of the elastic member 37 is based on the position when the outwardly projecting portion 3B is maximally expanded in the lateral direction Y. By using such an elastic member 37, when the diaper is worn, the second folded part and the third folded part can be easily formed in the vertical center region of the leak-proof cuff, and the tightness at the crotch area is improved. Further, it is possible to further effectively prevent side leakage of excrement.

In the outwardly extending portion 3B, in order to make the extensional stress of the elastic member 37 located inward in the lateral direction Y higher than the extensional stress of the elastic member 37 located outward in the lateral direction Y, for example, the outwardly extending portion 3B is These elastic members are arranged so that the expansion magnification of the elastic members 37 located inside the portion 3B in the lateral direction Y is higher than the expansion magnification of the elastic members 37 located outside the outward projecting portion 3B in the lateral direction Y. It is preferable to arrange 37. When three or more elastic members 37 are arranged, the expansion magnification of each elastic member 37 may increase stepwise from the outside to the inside in the lateral direction Y of the outward projecting portion 3B. Alternatively, the expansion magnification of the elastic member 37 located innermost in the lateral direction Y of the outwardly projecting portion 3B may be the highest, and the expansion magnification of the other elastic members 37 may be the same.

The elongation magnification of each elastic member 37 can be measured, for example, by the following method. First, each elastic member 37 disposed on the outwardly extending portion 3B of the leak-proof cuff 3 is taken out, each elastic member 37 is stretched to the maximum in the longitudinal direction, and a permanent marker is applied to each elastic member 37. 2, and make two marks at a constant interval L1 in the expansion/contraction direction. Next, the length L2 of the marked elastic member 37 is measured in a non-stretched state. This measurement is performed three times for each elastic member 37, and the elongation magnification (times) is determined by the arithmetic mean value of the values calculated by the formula "L1/L2". The interval L1 can be, for example, 100 mm.

The elongation magnification of the elastic member 37 measured in the above-mentioned measuring method is such that the elongation magnification of the elastic member 37 located inward of the outward overhanging portion 3B in the lateral direction Y is Provided that the elongation magnification is higher than the elongation magnification of the positioned elastic member 37, the elongation magnification is preferably 1.5 times or more, more preferably 2.0 times or more, and preferably 3. It is 5 times or less, more preferably 3.0 times or less.

Instead of or in addition to the above-mentioned form, in the outward projecting portion 3B, the elongation stress of the elastic member 37 located inward in the lateral direction Y is changed to the elongation stress of the elastic member 37 located outward in the lateral direction Y. For example, in order to make the thickness higher than that of the elastic member 37 located on the inner side of the outer projecting portion 3B in the lateral direction Y, the thickness of the elastic member 37 located on the inner side of the outer projecting portion 3B in the lateral direction It is also preferable to arrange these elastic members 37 so that the height is higher than the thickness. When three or more elastic members 37 are arranged, the thickness of each elastic member 37 may increase stepwise from the outside to the inside in the lateral direction Y of the outward projecting portion 3B. Alternatively, the elastic member 37 located innermost in the lateral direction Y of the outwardly projecting portion 3B may have the largest thickness, and the other elastic members 37 may have the same thickness.
By using such an elastic member 37, the second folded part and the third folded part can be easily formed in the vertical center region of the leak-proof cuff when wearing the diaper, and the tightness at the crotch area can be improved. It is possible to further increase this and further effectively prevent the side leakage of excrement.

The thickness of each elastic member 37 described above refers to the thickness of each elastic member in a non-stretched state. When each elastic member 37 is filamentous, the cross-sectional diameter of each elastic member 37 is measured at three different locations, and expressed as the arithmetic mean value. When each elastic member 37 is strip-shaped, the thickness of each elastic member 37 is determined by measuring the length perpendicular to the stretching direction on the main surface of the elastic member at three different locations on one elastic member 37, and calculating the thickness using the arithmetic method. Expressed as an average value. When each elastic member 37 is composed of a bundle of a plurality of elastic fibers, a sample is obtained by cutting the elastic member to a certain length (e.g. 100 mm) from the leak-proof cuff to be measured. The mass may be divided by the length of the sample and expressed as the thickness (fineness) of the elastic member.

The thickness D1 (see FIG. 5) of the elastic member 37 in the non-stretched state measured by the above-mentioned measuring method is that the thickness of the elastic member 37 located inward in the lateral direction Y of the outward projecting portion 3B is On the condition that the thickness is larger than the thickness of the elastic member 37 located outward in the lateral direction Y of the overhanging portion 3B, each independently expressed in fineness is preferably 150 dtex or more, more preferably 300 dtex. or more, preferably 950 dtex or less, more preferably 800 dtex or less.

In place of or in addition to the above-mentioned form, in the outwardly projecting portion 3B, the extension stress of the elastic member 37 located inward in the lateral direction Y is applied to the extension stress of the elastic member 37 located outward in the lateral direction Y. In order to make the stress higher than the stress, for example, the elastic modulus of the resin constituting the elastic member 37 located inward in the lateral direction Y of the outwardly extending portion 3B is set to be higher than that in the outward extending portion 3B in the lateral direction Y. It is also preferable to arrange these elastic members 37 so that the elastic modulus is higher than the elastic modulus of the constituent resin of the elastic members 37. When three or more elastic members 37 are arranged, the elastic modulus of the resin constituting each elastic member 37 may increase stepwise from the outer side to the inner side in the lateral direction Y of the outwardly projecting portion 3B. good. Alternatively, the elastic modulus of the constituent resin of the elastic member 37 located innermost in the lateral direction Y of the outwardly projecting portion 3B may be the largest, and the elastic moduli of the constituent resins of the other elastic members 37 may be the same. Note that the elastic modulus described above is based on the assumption that each elastic member 37 has the same thickness and has the same expansion magnification.
By using such an elastic member 37, the second folded part and the third folded part can be easily formed in the vertical center region of the leak-proof cuff when wearing the diaper, and the tightness at the crotch area can be improved. It is possible to further increase this and further effectively prevent the side leakage of excrement.

In any of the above-mentioned forms, the resin constituting the elastic member 37 may be independently selected from, for example, synthetic rubber such as natural rubber, EVA rubber, styrene-butadiene rubber, butadiene rubber, isoprene rubber, and neoprene rubber; Mention may be made of polyurethanes as well as thermoplastic elastomers. Examples of thermoplastic elastomers include SBS (styrene-butadiene-styrene), SIS (styrene-isoprene-styrene), SEBS (styrene-ethylene-butadiene-styrene), and SEPS (styrene-ethylene-propylene-styrene). Examples include styrene-based elastomers, ethylene-based α-olefin elastomers, olefin-based elastomers such as propylene-based elastomers copolymerized with ethylene, butene, octene, etc., polyester-based elastomers, and polyurethane-based elastomers. These constituent resins can be used alone or in combination of two or more. As for the constituent resin of the elastic member 42, those mentioned above can be used in the same manner.

As the cuff forming sheet 30, a hydrophobic sheet material is preferably used from the viewpoint of reliably fulfilling the role of preventing bodily fluids such as urine from leaking to the outside. Hydrophobic sheet materials include nonwoven fabrics, in particular air-through nonwoven fabrics, spunbond nonwoven fabrics, and meltblown nonwoven fabrics. Alternatively, a multilayer nonwoven fabric such as a spunbond-meltblown-spunbond nonwoven fabric can be used. In addition to these, a hydrophobic resin film, a laminate of the resin film and the nonwoven fabric, etc. can be used as the cuff forming sheet 30.

Further, as the leak-proof cuff 3, elastic sheets described in JP-A-2008-179128 and JP-A-2007-22066 can be used. In this case, as the elastic member 37, for example, fibers made from thermoplastic elastomers such as the above-mentioned styrene elastomers, olefin elastomers, polyester elastomers, and polyurethane elastomers, and elastic resins such as rubber can be used. Moreover, as the sheet material, various nonwoven fabrics explained in connection with the cuff forming sheet 30 can be used.

As described above, the leak-proof cuff 3 preferably includes the elastic member 37 and the non-stretchable cuff-forming sheet 30 made of non-woven fabric. Preferably, the ring crush compressive strength is within a predetermined range. Specifically, the cuff forming sheet 30 has a ring crush compressive strength of preferably 10.0 N/30 mm or less, more preferably 8.0 N/30 mm or less, and still more preferably 7.5 N/30 mm, as measured by the method described below. It is 30 mm or less, and the lower the lower limit is, the more preferable it is, but 1.0 N/30 mm or more is realistic.
By having such physical properties, the cuff forming sheet 30 can be easily bent by external force, so that the leak-proof cuff 3 can easily form the bent portion 35 and the outwardly extending portion 3B in the entire lengthwise direction X, making it easy to wear. It is possible to further improve the fit of the diaper in the entire front and rear direction of the person. Furthermore, the second folded part 50 and the third folded part 60 can be easily formed in the central region of the leak-proof cuff in the vertical direction Side leakage can be more effectively prevented.

Ring crush compressive strength can be measured as follows. First, five rectangular sheets having a length of 150 mm in the longitudinal direction X and 30 mm in the horizontal direction Y are cut out of the cuff forming sheet 30 constituting the leak-proof cuff 3, and these are used as test pieces. Each test piece is rolled into a cylindrical shape in the longitudinal direction of the test piece, and one end of the test piece in the longitudinal direction is overlapped by 5 mm to form a cylinder with a diameter of 45 mm. The upper end in the axial direction) and the lower end are stapled at two places (for example, No. 1 manufactured by Max Co., Ltd.). 10-1M needle] to obtain five cylindrical measurement samples. Note that the direction of the needle is parallel to the circumferential direction. Each measurement sample obtained (initial sample width: 30 mm) was set in a Tensilon compression tester ("RTA-100" manufactured by Orientec Co., Ltd.), and a circular compression plate with a diameter of 70 mm or more was used to test the axial direction of the cylinder ( The maximum load (N/30 mm) when compressed at a compression speed of 10 mm/min in the transverse direction of the sample is measured. Similar measurements were performed on five measurement samples, and the arithmetic mean value thereof was taken as the ring crush compressive strength of the cuff forming sheet 30.

FIG. 5 schematically shows the arrangement position of the elastic member 37 in the design dimensions of the leak-proof cuff 3 and an embodiment of the cuff forming sheet 30. As shown in FIG. 5, the cuff forming sheet 30 constituting the leak-proof cuff 3 has a plurality of high fiber density portions 80 arranged in a scattered pattern on the condition that it is made of a non-stretchable fiber sheet such as a non-woven fabric. It is preferable that the In the high fiber density portion 80, compared to other parts of the cuff forming sheet 30, the distance between the fibers constituting the sheet is shortened, or some or all of the fiber structure disappears and becomes a film, resulting in fibers This is the area where the density is high. With such a configuration, the fold structure in which the high fiber density portion 80, which has a high fiber density and is higher in rigidity than other parts of the sheet material, is the starting point of bending of the sheet material. The anti-leak cuff 3 is successfully formed. As a result, the flexibility of the leak-proof cuff is improved, and the feel and fit of the leak-proof cuff to the wearer's body are improved. Such a high fiber density portion 80 is formed, for example, by previously applying a consolidation process such as embossing to the nonwoven fabric used, or by partially applying an interlacing process using a machine such as needle punching or spunlace to the nonwoven fabric used. be able to.

Each of the high fiber density parts 80 shown in FIG. 5 has an elliptical shape in plan view, and is formed at intervals in both the vertical direction X and the horizontal direction Y. The planar shape of the high fiber density portion 80 may be an isotropic shape such as a perfect circle, square, regular hexagon, or regular octagon, or may be an anisotropic shape such as a rectangle or an ellipse.

Further, when the high fiber density portion 80 is formed in the cuff forming sheet 30, as shown in FIG. It is preferable that the distance W6 between adjacent high fiber density parts 80 be larger than the interval W6. With this configuration, the sheet is easily folded between adjacent elastic members 37, so that the second folded portion 50 and the third folded portion 60 are successfully formed on the outwardly extending portion 3B. Become so. As a result, the fit between the central region in the longitudinal direction X and the wearer's crotch area is further improved, and lateral leakage of excrement can be prevented.

The distance W5 (see FIG. 5) between adjacent elastic members 37 in the lateral direction Y is preferably 1 mm or more, more preferably 2 mm or more, and preferably 9 mm or less, and even more preferably 10 mm or less. Further, the interval W6 (see FIG. 5) between adjacent high fiber density portions 80 in the lateral direction Y is preferably 0.5 mm or more, more preferably 1.0 mm or more, provided that W5>W6 is satisfied. Preferably it is 5.0 mm or less, more preferably 4.5 mm or less.

Further, when the leak-proof cuff 3 is configured to include an elastic member 37 and a cuff-forming sheet 30, as shown in FIG. It is preferable to have a joint portion 90 for joining the elastic member 37 and the elastic member 37. The region where the joint portion 90 is formed is the region where the elastic member 37 is fixed to the outwardly extending portion 3B. Each elastic member 37 in this embodiment is arranged in a parallel state extending in the vertical direction They are arranged at intervals along the At the same time, it is also preferable that the joint portions 90 extend in the vertical direction X and are formed intermittently at a distance in the horizontal direction Y.
In the form shown in the figure, the joint portion 90 is formed at a position that overlaps the position where the elastic member 37 is arranged in the thickness direction, and is not formed at a position where the elastic member 37 is not arranged. An adhesive or the like is typically disposed at the joint 90, and the joint 90 is preferably formed at least at a position corresponding to the arrangement position of the elastic member 37 in the longitudinal direction X central region of the diaper 1. , it is more preferable that the elastic member 37 is formed in the entire area corresponding to the position where the elastic member 37 is arranged in the longitudinal direction X.
With this configuration, the elastic members 37 can be more firmly fixed to the cuff forming sheet 30, and even when an external force is applied, the arrangement interval of the elastic members 37 in the horizontal direction Y can be adjusted to the center area in the vertical direction X. , preferably can be easily maintained constant over the entire lengthwise direction X. As a result, the leak-proof cuff can be fitted uniformly to the wearer's body along the wearer's front and back direction corresponding to the longitudinal direction It can be effectively prevented.
In addition, since a low-rigidity portion can be formed in the portion of the outwardly projecting portion 3B that does not have the joint portion 90, the portion that does not have the joint portion 90 serves as a flexible shaft, making it easier for the sheet to bend. Become. As a result, the second bent portion 50 and the third bent portion 60 are successfully formed on the outwardly extending portion 3B, and the fit between the central region in the longitudinal direction X and the wearer's crotch area is further improved. , it is possible to prevent the side leakage of excrement.

Although the absorbent article having the above configuration has been described using a deployable disposable diaper as an example, the present invention is applicable to any absorbent article having a leak-proof cuff. Examples of such absorbent articles include, but are not limited to, expandable disposable diapers, pants-type disposable diapers, incontinence pads, sanitary napkins, and the like.

Although the present invention has been described above based on its preferred embodiments, the present invention is not limited to the above-described embodiments. For example, in the above-mentioned embodiment, an example is described in which the second folded part 50 and the third folded part 60 are not formed in the outward projecting part 3B located in the front region and the rear region in the longitudinal direction X of the diaper 1. However, on the condition that "length W1<length W2" is satisfied, the second folded part 50 and the third folded part are formed on the outer projecting part 3B located in the front region and the rear region in the longitudinal direction X of the diaper 1. At least one of 60 may be formed.

In addition, in the leak-proof cuff 3 according to the present embodiment, as shown in FIGS. 2, 3, and 4, only an outward projecting portion 3B projecting outward in the lateral direction Y from the bent portion 35 is formed. , instead of this, in addition to the outward projecting portion 3B projecting outward in the lateral direction Y from the position of the bending portion 35, an inward projecting portion projecting inward in the horizontal direction Y from the position of the bending portion 35. It may be provided.

Regarding the embodiment of the present invention described above, the following absorbent article is further disclosed.
<1>
An absorbent article having a longitudinal direction corresponding to the front-back direction of the wearer and a lateral direction perpendicular to the longitudinal direction, and having a pair of leak-proof cuffs extending in the longitudinal direction provided on the skin-facing surface, The leak-proof cuff has a proximal end serving as an upright end of the leak-proof cuff, a free end, and a bent part located between the proximal end and the free end and extending in the longitudinal direction. , each leak-proof cuff has a lower portion located between the base end portion and the bent portion, and an outer portion located between the bent portion and the free end portion and projecting outward in the lateral direction. The outward projecting portion has a plurality of elastic members extending in the vertical direction and arranged in a stretched state, and in a natural state, the outward projecting portion has a plurality of elastic members extending in the longitudinal direction. The width along the horizontal direction in the central region is smaller than the width along the horizontal direction in the longitudinal front region and the longitudinal rear region, and at least in the longitudinal central region, each of the elastic members has a width along the longitudinal direction. A part of the elastic member is fixed to the outward projecting portion, and in the region where the elastic member is fixed, each of the elastic members adjacent to each other along the width direction are arranged in parallel with an interval. , absorbent articles.

<2>
The leak-proof cuff has a second bent portion extending in the longitudinal direction between the free end portion and the bent portion, and the second bent portion includes the free end portion and the bent portion of the free end portion. The outward projecting portion is located between the elastic member disposed closest to the elastic member, and the outward projecting portion has an outer region located between the free end portion and the second bent portion in the longitudinal center region. The absorbent article according to <1> above, wherein the absorbent article stands up toward the wearer's body side or is folded back toward the lateral inward side.
<3>
The leak-proof cuff has a second bent portion extending in the longitudinal direction between the free end portion and the bent portion, and the second bent portion is disposed closest to the free end portion. and the elastic member disposed closest to the bent portion, and the outwardly projecting portion is located between the free end portion and the second bent portion in the longitudinal center region. The absorbent article according to <1>, wherein the outer region located between the absorbent article and the outer region stands up toward the wearer's body side or is folded back toward the inner side in the lateral direction.

<4>
The absorbent article according to <2> or <3>, wherein a plurality of the elastic members are arranged in the outer region.
<5>
<2> to <4>, wherein a plurality of the elastic members are arranged in each of the region along the lateral direction between the second bent part and the bent part and the outer region. The absorbent article according to any one of the above.
<6>
The leak-proof cuff has a second bent part and a third bent part extending in the longitudinal direction between the free end part and the bent part, and the second bent part is closer to the free end part. The third bent portion is located closer to the bent portion, and the outward projecting portion is located closer to the inner portion located between the bent portion and the second bent portion in the longitudinal center region. The square area is folded back inward in the lateral direction, and the outer area located between the second bent part and the free end part is folded back in the outward direction in the lateral direction. The absorbent article according to <1> above.
<7>
Each of the leak-proof cuffs includes the elastic member and a cuff-forming sheet made of a non-woven fabric, and the cuff-forming sheet has a plurality of scattered high fiber density portions, and the adjacent elastic The absorbent article according to any one of <1> to <6>, wherein the distance between the members in the lateral direction is larger than the distance between the high fiber density parts adjacent in the lateral direction.

<8>
The absorbent article according to any one of <1> to <7>, wherein at least two kinds of the elastic members having different elongation stresses are arranged.
<9>
Each of the leak-proof cuffs includes the elastic member and a cuff-forming sheet, and each of the leak-proof cuffs has a joint portion that joins the cuff-forming sheet and the elastic member; The absorbent article according to any one of <1> to <8>, wherein the joint portion extends in the vertical direction and is formed intermittently in the horizontal direction.
<10>
Each of the leak-proof cuffs includes the elastic member and a cuff-forming sheet, and the cuff-forming sheet has a ring crush compressive strength of 10.0 N/30 mm or less, <1> to The absorbent article according to any one of <9>.

<11>
The absorbent article according to any one of <1> to <10>, wherein the bent portion is located offset from the lateral center of the leak-proof cuff toward the free end.
<12>
The absorbent article according to any one of <1> to <10>, wherein the bent portion is located offset from the lateral center of the leak-proof cuff toward the proximal end.
<13>
The absorbent article according to any one of <1> to <12>, wherein the outwardly projecting portion projects outward in the lateral direction beyond the position of the folded portion.
<14>
The absorbent article according to any one of <1> to <13>, wherein the outwardly projecting portion is formed over the entire length of the leak-proof cuff in the longitudinal direction.

<15>
The absorbent article according to any one of <1> to <14>, wherein the elastic member extends not only to the longitudinal center region but also to the longitudinal front region and rear region.
<16>
The width of the outward projecting portion along the horizontal direction increases continuously when viewed from the longitudinal center portion to the longitudinal front region and the longitudinal rear region, The absorbent article according to any one of > to <15>.
<17>
In the natural state of the absorbent article, the length W1 of the outwardly projecting portion in the longitudinal center region along the horizontal direction is 4 mm or more and 24 mm or less, preferably 9 mm or more and 19 mm or less, <1> to The absorbent article according to any one of <16>.
<18>
<1> to <17> above, wherein the length W2 of the outward projecting portion in the longitudinal direction front region and the longitudinal direction rear region along the horizontal direction is 5 mm or more and 25 mm or less, preferably 10 mm or more and 20 mm or less. The absorbent article according to any one of the above.
<19>
In a region where the elastic member is fixed, a first imaginary line along the extending direction of any of the elastic members and a second imaginary line along the extending direction of the elastic member adjacent to the elastic member are mutually The absorbent article according to any one of <1> to <18>, wherein the first imaginary line and the second imaginary line do not intersect, and the angle formed by the first imaginary line and the second imaginary line is within 2°.
<20>
The absorbent article according to <19>, wherein the first imaginary line and the second imaginary line form an angle of 1° or less.

1 Absorbent article 2 Absorbent main body 3 Leak-proof cuff 30 Cuff forming sheet 31 Base end portion 32 Free end portion 35 Folded portion 37 Elastic member 3A Lower portion 3B Outward projecting portion 50 Second bent portion 60 Third bent portion 80 High Fiber density part 90 Joint part X Vertical direction Y Horizontal direction

Claims (8)

An absorbent article having a vertical direction corresponding to the front-to-back direction of the wearer and a horizontal direction perpendicular to the vertical direction, and having a pair of leak-proof cuffs extending in the vertical direction provided on the skin-facing surface,
Each of the leak-proof cuffs has a proximal end serving as an upright end of the leak-proof cuff, a free end, and a bent part located between the proximal end and the free end and extending in the longitudinal direction. have,
Each of the leak-proof cuffs has a lower part located between the base end part and the bent part, and an outer part located between the bent part and the free end part and projecting outward in the lateral direction. It is divided into an overhanging part,
The outward projecting portion includes a plurality of elastic members extending in the vertical direction and arranged in a stretched state;
In a natural state, the width along the horizontal direction in the longitudinally central region of the outwardly projecting portion is smaller than the width along the horizontal direction in the longitudinally front region and the longitudinally rear region;
At least in the central region in the longitudinal direction, at least a portion of each elastic member in the longitudinal direction is fixed to the outward projecting portion, and in the region where the elastic member is fixed, the elastic members are adjacent to each other along the lateral direction. An absorbent article, wherein the matching elastic members are arranged in parallel at intervals. The leak-proof cuff has a second bent portion extending in the longitudinal direction between the free end portion and the bent portion,
the second bent portion is located between the free end and the elastic member disposed closest to the free end;
The outward projecting portion has an outer region located between the free end portion and the second bent portion in the longitudinal center region that stands up toward the wearer's body side, or The absorbent article according to claim 1, wherein the absorbent article is folded laterally inward. The leak-proof cuff has a second bent portion extending in the longitudinal direction between the free end portion and the bent portion,
The second bent portion is located between the elastic member disposed closest to the free end portion and the elastic member disposed closest to the bent portion,
The outward projecting portion has an outer region located between the free end portion and the second bent portion in the longitudinal center region that stands up toward the wearer's body side, or The absorbent article according to claim 1, wherein the absorbent article is folded laterally inward. The leak-proof cuff has a second bent part and a third bent part, each extending in the longitudinal direction, between the free end part and the bent part,
The second bent portion is located closer to the free end, and the third bent portion is located closer to the bent portion,
In the outward projecting portion, an inner region located between the bent portion and the second bent portion is folded back inward in the horizontal direction in the longitudinal center region, and The absorbent article according to claim 1, wherein an outer region located between the two-folded portion and the free end portion is folded back toward the outer side in the lateral direction. Each of the leak-proof cuffs includes the elastic member and a cuff-forming sheet made of nonwoven fabric,
The cuff forming sheet has a plurality of scattered high fiber density portions,
The absorbent article according to any one of claims 1 to 4, wherein a distance between adjacent elastic members in the lateral direction is larger than a distance between the high fiber density portions adjacent in the lateral direction. The absorbent article according to any one of claims 1 to 5, wherein at least two kinds of the elastic members having different elongation stresses are arranged. Each of the leak-proof cuffs includes the elastic member and a cuff-forming sheet,
Each of the leak-proof cuffs has a joint portion that joins the cuff-forming sheet and the elastic member,
The joint portion extends in the vertical direction and is formed intermittently in the horizontal direction. The absorbent article according to any one of claims 1 to 6. Each of the leak-proof cuffs includes the elastic member and a cuff-forming sheet,
The absorbent article according to any one of claims 1 to 7, wherein the cuff forming sheet has a ring crush compressive strength of 10.0 N/30 mm or less.

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