JP2022021551A - Absorbent article - Google Patents

Abstract

To provide an absorbent article excellent in fitness in a wearer's crotch part.SOLUTION: An absorbent article 1 has a vertical direction X and a horizontal direction Y orthogonal to the vertical direction X, and is provided with a pair of leakage prevention cuffs 3 extending in the vertical direction X on the surface facing the skin. The respective leakage prevention cuffs 3 have base end parts 31, free end parts 32, and bending parts 35 positioned therebetween and extending in the vertical direction X. The respective leakage prevention cuffs 3 are divided into lower parts 3A positioned between the base end parts 31 and the bending parts 35 and outward extension parts 3B positioned between the bending part 35 and the free end part 32. The outward extension parts 3B have a plurality of elastic members 37 extending in the vertical direction X and arranged in an extended state. In a natural state, a breadth in a central area in the vertical direction of the outward extension parts 3B is smaller than a breadth in a front area in the vertical direction and a rear area in the vertical direction. The respective elastic members 37 are arranged in a parallel state at an interval along a horizontal direction Y of the adjacent elastic members 37 at a fixed part.SELECTED DRAWING: Figure 1

Description

The present invention relates to an absorbent article.

Absorbent articles such as disposable diapers are known to be provided with a lateral leakage prevention member, which is also called a leakage prevention cuff, a three-dimensional gather, or a three-dimensional guard, on the side facing the skin. This side leakage prevention member is typically arranged on both sides along the direction corresponding to the front-back direction of the wearer, and stands up toward the wearer's skin side when wearing the absorbent article, and urine. Prevents lateral leakage by blocking excrement such as stool and stool.

The present applicant has proposed a disposable diaper provided with a leak-proof cuff having a plurality of elastic members (Patent Document 1). The leak-proof cuff is bent and folded at at least two bending portions between the free end and the fixed end. As a result, the width of the inseam can be narrowed while suppressing the deterioration of the leakage-proof performance.

Further, in Patent Document 2, for the purpose of enhancing the adhesion of the leak-proof cuff, the shrinkage of the leak-proof cuff approaches from the proximal end side to the free end as it goes from both ends in the longitudinal direction toward the intermediate position in the direction. An absorbent article provided with elastic contraction means for forming a line of action is disclosed.

Further, in Patent Document 3, for the purpose of preventing the leakage of excrement both in the lateral direction and in the rear part of the article, the elastic member in the first leakage-proof cuff and the elasticity in the second leakage-proof cuff in the unfolded state of the article are described. Disclosed is a diaper having a shape in which the distance from the member in the width direction of the article becomes narrower from the rear portion of the article toward the front of the article.

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

Absorbent articles such as disposable diapers may slip downward during wear due to the mass of the article itself or the mass of excrement absorbed, and are placed in and around the wearer's inseam to prevent leakage. The cuff does not adhere sufficiently to the wearer's body and the fit may be impaired. As a result, lateral leakage of excrement may occur.
The absorbent articles of Patent Documents 1 to 3 have good adhesion to the wearer's body of the leak-proof cuff arranged in and around the inseam, but further improve the adhesion to the wearer's body. There was room for improvement in terms of points.

Therefore, the present invention relates to an absorbent article having an improved fit in the inseam of the wearer.

The present invention is an absorbent article having a vertical direction corresponding to the front-back direction of the wearer and a horizontal direction orthogonal to the vertical direction, and a pair of leak-proof cuffs extending in the vertical direction are provided on the skin facing surface. hand,
Each of the leak-proof cuffs has a base end portion that is an upright end of the leak-proof cuff, a free end portion, and a bent portion that is located between the base end portion and the free end portion and extends in the vertical direction. Have and
Each of the leak-proof cuffs is located at a lower portion located between the base end portion and the bent portion, and is located between the bent portion and the free end portion, and extends outward in the lateral direction. It is divided into overhanging parts and
The outward overhanging portion has a plurality of elastic members extending in the vertical direction and arranged in an extended state.
In the natural state, the width of the outer overhanging portion along the horizontal direction in the central region in the vertical direction is smaller than the width along the horizontal direction in the front region in the vertical direction and the rear region in the vertical direction.
At least in the central region in the vertical direction, at least a part of each elastic member in the vertical direction is fixed to the outward overhanging portion, and the elastic member is adjacent to the elastic member along the width direction at the fixed portion. It is intended to provide an absorbent article in which the matching elastic members are arranged in parallel at intervals.

According to the present invention, there is provided an absorbent article having an excellent fit in the inseam of the wearer.

FIG. 1 is a schematic perspective view of a disposable diaper according to an embodiment of the absorbent article of the present invention in a natural state. FIG. 2 is a schematic view (corresponding to line I-I) of a cross section along the horizontal direction in the vertical central region of the diaper in the natural state shown in FIG. FIG. 3 is a schematic view (corresponding to line II-II) of a cross section along the horizontal direction in the vertical rear region of the diaper in the natural state shown in FIG. 4 (a) and 4 (b) are enlarged views of a main part of a cross section along the lateral direction showing one embodiment of the leak-proof cuff of the diaper in the natural state shown in FIG. FIG. 5 is a schematic view in a plan view in the design dimensions of the outward overhanging portion of the leak-proof cuff. FIG. 6 is an enlarged view of a main part of a cross section along the lateral direction showing an example of the embodiment of the leakage-proof cuff of the diaper shown in FIG.

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

The diaper 1 schematically shown in FIG. 1 corresponds to the front-back direction of the wearer, and has a vertical direction X extending from the ventral side of the wearer to the dorsal side via the inseam and a lateral direction Y orthogonal to the vertical direction X. Have. The central region in the vertical direction X is configured to include an excretion portion facing portion (not shown) which is arranged to face the excretion portion of the wearer when the diaper 1 is worn. The central region in the vertical direction X is between the anterior region arranged on the ventral side of the wearer's ventral portion when worn and the posterior region arranged on the dorsal side of the excretory portion facing portion when worn. Is located in. Each area extends continuously in the anterior-posterior direction of the wearer.

As used herein, the "natural state" of a diaper means a state in which no external force is applied to the diaper (relaxed state). Specifically, the length of the elastic member arranged on the leak-proof cuff in the vertical direction X is the shortest.
The "skin facing surface" is the surface facing the wearer's skin when the diaper is worn, and the "non-skin facing surface" is the surface facing the wearer's skin when the diaper is worn. Is the side that is directed to the opposite side. That is, the skin-facing surface is the surface relatively close to the wearer's skin, and the non-skin-facing surface is the surface relatively far from the wearer's skin. "When worn" and "wearing state" refer to a state in which the proper wearing position of the diaper is maintained and worn.

FIG. 2 is a schematic cross-sectional view of the diaper 1 in the natural state along the horizontal direction Y in the vertical direction X central region. FIG. 3 is a schematic cross-sectional view of the diaper 1 in the natural state along the horizontal direction Y in the vertical direction X rear region. In FIG. 3, for convenience of explanation, a cross section along the horizontal direction Y in the vertical X rear region of the diaper 1 is described as an example, but the vertical X front region of the diaper 1 in the present embodiment is the diaper 1. It has the same configuration as the vertical X rear region. Therefore, the description regarding the vertical X rear region of the diaper 1 is appropriately applied to the vertical X front region of the diaper 1 unless otherwise specified.

As shown in FIGS. 2 and 3, the diaper 1 includes an absorbent body 2. The absorbent main body 2 is interposed between the front surface sheet 21 arranged on the skin facing surface side, the back surface sheet 22 arranged on the non-skin facing surface side, and the front surface sheet 21 and the back surface sheet 22. It has a body 23. The front surface sheet 21, the back surface sheet 22, and the absorber 23 are configured by integrating them with a known joining means such as an adhesive. The absorber 23 is configured to include a liquid-retaining absorbent core 24 containing a water-absorbent material and a core wrap sheet 25 covering the outer surface of the absorbent core 24. The absorber 23 of the present embodiment has a rectangular shape in a plan view, and the longitudinal direction thereof and the vertical direction X in the diaper 1 are arranged so as to coincide with each other.

As the front surface sheet 21, the back surface sheet 22, and the absorber 23, various types conventionally used for this type of absorbent article can be used without particular limitation. As the surface sheet 21, for example, a non-woven fabric having a single-layer or multi-layer structure or a perforated film having liquid permeability can be used. As the back surface sheet 22, a sheet having liquid impermeability or liquid impermeability can be used, and for example, a moisture-permeable resin film or a laminate of a resin film and a non-woven fabric can be used. Examples of the absorbent core 24 constituting the absorbent body 23 include a fiber stack made by stacking water-absorbent materials such as wood pulp and a water-absorbent polymer, and a sheet-shaped absorbent structure containing the water-absorbent 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 non-woven fabric can be used.

The diaper 1 shown in FIGS. 1 to 3 is provided with a pair of leakage-proof cuffs 3 and 3 arranged apart from each other in the lateral direction Y on the skin-facing surface thereof. Each of the leak-proof cuffs 3 is arranged so as to extend in the vertical direction X. The leak-proof cuff 3 includes at least a plurality of elastic members 37 extending in the vertical direction X, and preferably includes a cuff-forming sheet 30 which 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 a non-woven fabric.

The diaper 1 of the present embodiment includes a pair of side flap portions 4 and 4 extending outward in the lateral direction Y from both side edges of the absorber 23 along the vertical direction X. In the embodiment shown in FIG. 2, the front surface sheet 21 covers the entire surface of the absorber 23 facing the skin, and the back surface sheet 22 covers the entire non-skin facing surface of the absorber 23. Both sheets 21 and 22 extend outward in the horizontal direction Y from both side edges of the absorber 23 along the vertical direction X, and form a side flap portion 4 together with the cuff forming sheet 30. That is, the side flap portion 4 is located laterally outward of the absorber 23 and is located at a portion where the absorber 23 is not arranged, and includes a front surface sheet 21, a back surface sheet 22, and a 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 an adhesive, a heat seal, and an ultrasonic seal.

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

As shown in FIG. 1, in the diaper 1 of the present embodiment, a pair of fastening tapes 7 and 7 are provided in the rear region in the vertical direction X. Each fastening tape 7 is arranged so as to extend from both side edges in the width direction Y in the side flap portion 4 located in the rear region of the vertical direction X. One end of each fastening tape 7 is fixed between the back surface 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 vertical X front region, a landing tape 72 as a fastening region to which the fastening portion 71 provided on the fastening tape 7 can be detachably fastened is provided. It is provided. As the landing tape 72, an appropriate material is selected according to the material of the fastening portion 71 included in the fastening tape 7. For example, when the fastening portion 71 is a male material of a mechanical fastener, a fiber sheet that can engage with the male material, for example, a knitted fabric or a non-woven fabric, can be used as the female material of the mechanical fastener as the landing tape 72. .. When the fastening portion 71 is an adhesive, for example, a smooth film made of synthetic resin can be used as the landing tape 72.

As described above, the diaper of the present invention includes a pair of leakage-proof cuffs 3, 3. Each leak-proof cuff 3 is preferably configured to include a cuff forming sheet 30. Each cuff forming sheet 30 is arranged so as to straddle the side edges of the absorber 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 vertical direction X over substantially the entire length of the sheet 30 in the vertical direction X, and a free end portion 32. The base end portion 31 is a fixing portion fixed to a member other than the cuff forming sheet 30. The free end portion 32 is a non-fixed portion with a member other than the cuff forming sheet 30. The leak-proof cuff 3 can stand on the skin side of the wearer with the innermost position in the lateral direction Y at the base end portion 31 as the standing end. The base end portion 31 and the free end portion 32 are preferably arranged at least in the central region of the vertical direction X, and may be arranged over the entire area along the vertical direction X. In the present specification, the entire area of the vertical direction X means a region including all of the front region, the central region, and the rear region, and is a concept different from the “total length” indicating the length of the vertical direction X. Both the base end portion 31 and the free end portion 32 may be arranged over the entire length of the vertical direction X. The other member described above is typically a member arranged so as to be in contact with the sheet 30 on the non-skin facing surface side of the cuff forming sheet 30, and the other member in the present embodiment is a surface sheet 21. be.

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

As shown in FIGS. 2 and 3, each leakage-proof cuff 3, 3 has a bent portion 35 located between the base end portion 31 and the free end portion 32. The bent portion 35 can be positioned at substantially the center of each of the leakage-proof cuffs 3 and 3 in the width direction X, for example. Alternatively, the bent portion 35 can be positioned so as to be offset from the lateral center of the leak-proof cuff 3 toward the free end portion 32, and conversely, be offset from the lateral center of the leak-proof cuff 3 toward the base end portion 31. It can also be positioned. The bent portion 35 extends in the vertical direction X, and in the present embodiment, the cuff forming sheet 30 is formed by being bent outward in the lateral direction Y between the base end portion 31 and the free end portion 32. By forming the bent portion 35, each of the leakage-proof cuffs 3 and 3 is located between the lower portion 3A located between the base end portion 31 and the bent portion 35, and between the bent portion 35 and the free end portion 32. It is divided into an outer overhanging portion 3B located at. The outer overhanging portion 3B projects laterally Y outward from the position of the bent portion 35, and is formed over the entire vertical direction X of the leakage-proof cuff 3.

The outward overhanging portion 3B in the present embodiment has a two-layer structure in which one continuous cuff forming sheet 30 is bent in the lateral direction Y to form two facing surfaces. One surface of the outward overhanging portion 3B formed by bending the cuff forming sheet 30 forms a contact surface that comes into contact with the wearer's skin.

The leak-proof cuff 3 has, in addition to the cuff forming sheet 30, a plurality of elastic members 37 extending in the vertical direction X and arranged in an extended state. Specifically, a plurality of thread-shaped or strip-shaped elastic members 37 are arranged on the outer overhanging portion 3B of the leak-proof cuff 3. A plurality of elastic members 37 are arranged side by side in the horizontal direction Y in a state of being expandable and contractible in the vertical direction X. The elastic member 37 is arranged at least in the vertical X central region of the diaper 1, and is fixed to the outer overhanging portion 3B at least in the vertical X central region. In some cases, the elastic member 37 extends to the front region and the rear region of the vertical direction X together with the central region of the vertical direction X. In each elastic member 37, at least a part of each elastic member 37 in the vertical direction is fixed to the outward overhanging portion 3B in at least the vertical X central region of the diaper 1. In some cases, each elastic member 37 is fixed to the outward overhanging portion 3B not only in the central region in the vertical direction X but also in the front region and the rear region in the vertical direction X.
As a fixing mode of each elastic member 37, for example, it is intermittently fixed at a plurality of points in the vertical direction in the vertical X central region, or continuously fixed within a predetermined length range in the vertical X central region. At the same time, there is an embodiment in which the portion is fixed in a portion other than the central region of the vertical direction X. In the former fixing mode, the elastic member 37 can be expanded and contracted in the vertical direction X between the portions fixed at least in the central region of the vertical direction X. In the latter fixed mode, the elastic member 37 can expand and contract in the vertical direction X at least between a portion fixed in the vertical X central region and a portion fixed in a region other than the vertical X central region. It has become.
In any case, in each elastic member 37, the elastic members 37 adjacent to each other along the width direction Y are arranged in parallel with each other at a portion where the elastic member 37 is fixed.

In the present specification, the "parallel state" means a first virtual line along the extending direction of an arbitrary elastic member 37 and an elastic member 37 adjacent to the elastic member 37 at a portion where the elastic member 37 is fixed. The second virtual lines along the extending direction do not intersect each other ("parallel" in the strict sense), and the angle between the first virtual line and the second virtual line is within 2 °, preferably within 1 °. Includes both being.
In general, if each elastic member 37 is designed to be arranged in parallel along the vertical direction X in the dimensional design of an absorbent article such as a diaper, the elastic members 37 are parallel to each other even in an actually manufactured article. It is common to be placed. However, in actual manufacturing, the position of the elastic member 37 may be slightly displaced. Therefore, the "parallel state" means to allow the deviation within the range in which the effect of the present invention is exhibited. However, it is also preferable that the elastic member 37 is in a parallel state with the virtual line along the vertical 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 (the elastic member is extended to the maximum to eliminate the influence of expansion and contraction of the elastic member and bending of the constituent members). It shall be carried out based on the dimensions when the absorbent article is spread out in a flat state).

In the natural state of the diaper 1, the width of the outer overhanging portion 3B of the leak-proof cuff 3 along the lateral direction Y is different between the central region of the vertical direction X and the other regions of the vertical direction X. Specifically, the width of the diaper 1 along the horizontal direction Y in the vertical X central region of the outer overhanging portion 3B is smaller than the width along the horizontal direction Y in the vertical X front region and the vertical X rear region. It has become. With such a configuration, the leak-proof cuff can be more easily brought into close contact with the wearer's inseam, and the fit of the diaper can be improved. When viewed from the central portion of the vertical direction X along the vertical front region and the rear region, the width of the outward overhanging portion 3B along the lateral direction Y may be continuously increased or increased stepwise. You may be doing it.

In the natural state of the diaper, the length W1 (see FIG. 2) along the lateral direction Y of the outward overhanging portion 3B in the vertical direction X central region is preferably 4 mm or more, more preferably 9 mm or more, and preferably 24 mm or less. It is more preferably 19 mm or less. The length W1 may be the same or different over the entire vertical X central region, provided that the above range is satisfied. The length W1 is the length when the outer overhanging portion 3B of the leak-proof cuff 3 is projected in a plane in the natural state of the diaper. Here, the plane projection means that when the plane formed by the outward overhanging portion 3B is parallel to the plane (the plane on which the diaper is placed) in the natural state of the diaper, it is literally projected onto the plane. If the surface formed by the outer overhanging portion 3B is not parallel to the plane (the diaper mounting surface) in the natural state of the diaper, project from the normal direction of the surface formed by the outer overhanging portion 3B. To say.

Further, the length W2 (see FIG. 3) along the lateral direction Y of the outward overhanging portion 3B in the vertical X front region and the vertical X rear region is independently larger than the length W1. It is preferably 5 mm or more, more preferably 10 mm or more, preferably 25 mm or less, still more preferably 20 mm or less. The length W2 may be the same or different in the entire vertical X front region and vertical X rear region, provided that the above range is satisfied. Similar to the length W1, the length W2 is the length when the surface formed by the outward overhanging portion 3B is projected in a plane in the natural state of the diaper.

In the natural state of the diaper, for example, FIGS. 2 to 4 show that the width of the outer overhanging portion 3B along the horizontal direction Y differs between the central region of the vertical direction X and the other regions of the vertical direction X. As shown, in the central region of the vertical direction X, one or more bent portions 50, 60 extending in the vertical direction X different from the bent portion 35 are further formed between the free end portion 32 and the bent portion 35. , The bent portions 50 and 60 different from the bent portions 35 may not be formed in the region other than the central region in the vertical direction X.

2 and 4 (a) and 4 (b) show an embodiment of the lateral Y cross section of the leak-proof cuff 3 in the vertical X central region of the diaper 1. In the leakage-proof cuffs 3 shown in FIGS. 2 and 4 (a) and 4 (b), each elastic member 37 arranged on the outer overhanging portion 3B is located in a portion where the elastic member 37 is fixed, in the width direction Y. The elastic members 37 adjacent to each other are arranged in a parallel state at intervals. For convenience of explanation, some of the leak-proof cuffs 3 shown in the figure are shown so that the intervals of the elastic members 37 arranged on the outer overhanging portion 3B along the lateral direction Y are different, but the elastics are adjacent to each other. As shown in the figure, the spacing between the members 37 along the lateral direction Y may be different from each other at the portion where the elastic member 37 is fixed, or may be arranged so as to be the same instead. ..

Specifically, as shown in FIG. 2, the leak-proof cuff 3 has a second bent portion 50 extending in the vertical direction X between the free end portion 32 and the bent portion 35, in addition to the bent portion 35. Is preferable. By providing the second bent portion 50 in the vertical central region of the leakage-proof cuff 3, the width along the lateral Y of the outward overhanging portion 3B in the vertical X central region is set to the lateral Y in the region other than the vertical central region. Can be smaller than the width along. The second bent portion 50 is formed in the outward overhanging portion 3B.

The second bent portion 50 in the embodiment shown in FIG. 2 is located between the free end portion 32 in the outward overhanging portion 3B and the elastic member 37 arranged closest to the free end portion 32, and is located in the vertical direction. It extends to X. The second bent portion 50 in the present embodiment is located closer to the free end portion 32 with respect to the lateral central portion of the leak-proof cuff 3. The second bent portion 50 in the present embodiment is formed by bending a cuff forming sheet 30 located between the free end portion 32 and the elastic member 37 arranged on the outermost side in the lateral direction Y. .. In the natural state of the outward overhanging portion 3B in the present embodiment, the second bent portion 50 is used as a flexible axis between the free end portion 32 and the second bent portion 50 in the vertical X central region of the diaper 1. It is also preferable that the located outer region 3S stands up toward the wearer's body side or is folded back toward the lateral Y inward. In addition, "folded inward in the lateral direction Y" means that the outer region 3S is folded toward the skin facing surface side and the outer region 3S is facing the non-skin facing surface side. It is a meaning that includes both the case where it is folded back 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 side. Since the outer region 3S is folded back toward the skin-facing surface side and inward in the lateral direction Y, the diaper is more excellent in the leakage-proof property of excrement. The outer overhanging portions 3B located in the vertical X front region and the rear region of the diaper 1 are independent of each other provided that the above-mentioned width relationship of the outer overhanging portion 3B along the lateral direction Y is satisfied. , The outer region 3S may or may not be formed.

Along the lateral direction Y of the outer region 3S in the vertical X central region with respect to the length of the design dimension along the lateral direction Y of the outer overhanging portion 3B including the outer region 3S in the vertical X central region of the diaper 1. 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 more than 2%. It is preferably 30% or less, more preferably 20% or less. With such a range, the leak-proof cuff can be brought into close contact with the wearer's inseam, the fit of the diaper can be further improved, and lateral leakage of excrement can be prevented more effectively. ..

As shown in FIG. 4A, as another form in which the width of the outer overhanging portion 3B in the vertical central region along the horizontal direction Y is made smaller than the width along the horizontal direction Y in the region other than the vertical central region. The elastic member 37 in which the second bent portion 50 extending in the vertical direction X is arranged closest to the free end portion 32 in the outward overhanging portion 3B and the elastic member 37 arranged closest to the bent portion 35. It is also preferable that it is located between and. The second bent portion 50 in the present embodiment is formed by bending a cuff forming sheet 30 located between adjacent elastic members 37 in the outward overhanging portion 3B. The second bent portion 50 shown in FIG. 4A is formed in the central portion in the lateral direction Y between the free end portion 32 and the bent portion 35, but is formed between the elastic members 37. As long as it is limited, it may be located closer to the free end portion 32 with respect to the lateral central portion of the leak-proof cuff 3, or may be located closer to the bent portion 35 with respect to the lateral central portion of the leak-proof cuff 3. good.
In its natural state, the outward overhanging portion 3B in the present embodiment has the free end portion 32 and the second bent portion 32 in the vertical X central region of the diaper 1 with the second bent portion 50 as the flexible axis as in the above-described embodiment. It is also preferable that the outer region 3S located between the portion 50 and the outer region 3S stands up toward the wearer's body side or is folded inward in the lateral direction Y. The outer overhanging portions 3B located in the vertical X front region and the rear region of the diaper 1 are independent of each other provided that the above-mentioned width relationship of the outer overhanging portion 3B along the lateral direction Y is satisfied. , The outer region 3S may or may not be formed.

Further, in the outer overhanging portion 3B in the vertical direction X central region, if a plurality of elastic members 37 are configured to exist in the outer overhanging portion 3S, the outer overhanging portion 3B is likely to come into contact with the wearer's skin on the surface. This is preferable because the adhesion can be further improved. In addition to this, when a plurality of elastic members 37 are configured to exist in the region along the lateral direction Y between the second bent portion 50 and the bent portion 35, the outer overhanging portion 3B is the wearer's skin. It is preferable because it is stable and easy to come into contact with the surface, and the followability to the wearer's movement and the adhesion to the wearer's skin can be further enhanced. In such a configuration, for example, as will be described later, the extension stress of the elastic member 37 located inside the lateral direction Y of the outward overhanging portion 3B is applied to the extension stress of the elastic member 37 located outside the lateral direction Y, and the elastic member is located outside the lateral direction Y. This can be easily achieved by arranging a plurality of elastic members 37 so as to be higher than the elongation stress of the vertical direction X of 37.

As shown in FIG. 4B, as yet another form in which the width of the outer overhanging portion 3B in the vertical central region along the horizontal direction Y is made smaller than the width along the horizontal direction Y in the region other than the vertical central region. In addition, the leak-proof cuff 3 has a second bent portion 50 and a third bent portion extending in the vertical direction X between the free end portion 32 and the bent portion 35 in the outward overhanging portion 3B, separately from the bent portion 35. It is preferable to have 60. The second bent portion 50 in the present embodiment is located closer to the free end portion 32 in the lateral direction Y of the outward overhanging portion 3B with respect to the lateral central portion of the leak-proof cuff 3. The third bent portion 60 is located closer to the bent portion 35 of the outward overhanging portion 3B in the lateral direction Y with respect to the lateral central portion of the leak-proof cuff 3. That is, the second bent portion 50 is located outside the lateral direction Y with respect to the third bent portion 60. In the present embodiment, the second bent portion 50 is located at a substantially central portion between the free end portion 32 and the bent portion 35 in the outward overhanging portion 3B, and the third bent portion 60 is the second bent portion. It is located approximately in the center between the 50 and the bent portion 35. The forming position of the second bent portion 50 and the third bent portion 60 is based on the position when the outer overhanging portion 3B is extended to the maximum in the lateral direction Y.

When the second bent portion 50 and the third bent portion 60 are formed on the outer overhanging portion 3B, as shown in FIG. 4B, the outer overhanging portion 3B is a bent portion in the vertical X central region. The inner region 3T located between the 35 and the second bent portion 50 is formed so as to be folded inward in the lateral direction Y. In addition to this, in the outer overhanging portion 3B, the outer region 3S located between the second bent portion 50 and the free end portion 32 is folded back toward the lateral Y outward. Both the portion 50 and the third bent portion 60 are formed by bending the cuff forming sheet 30 located in the outward overhanging portion 3B. In the outer overhanging portion 3B located in the vertical direction X front region and the rear region of the diaper 1, each of the outer overhanging portions 3S independently, provided that the relationship of the widths of the outer overhanging portion 3B described above is satisfied. And the inner region 3T may or may not be formed.

The configuration relating to the second bent portion 50 and the third bent portion 60 described above may satisfy any of the above-mentioned configurations, or may be configured by combining the above-mentioned configurations. In order to form the above-mentioned second bent portion 50 and the third bent portion 60, for example, the cuff forming sheet 30 is provided so that the above-mentioned second bent portion 50 and the third bent portion 60 can be formed at a predetermined position. It may be bent in advance and fixed at the front end portion and the rear end portion in the vertical direction X to give a bending habit. Alternatively, the elongation stress in the vertical direction X of the elastic member 37 located inside the lateral direction Y of the outward overhanging portion 3B is larger than the elongation stress in the vertical direction X of the elastic member 37 located outside the lateral direction Y. It may be configured to be high. Details regarding the configuration for changing the elongation stress will be described later.

The absorbent article having the above structure has the outer overhanging portion formed on the leak-proof cuff, so that the outer overhanging portion and the wearer's skin are brought into surface contact with each other and adhere to the entire area in the front-rear direction of the wearer. It is possible to improve the property and improve the fit of the absorbent article.
In addition to this, the plurality of elastic members constituting the leak-proof cuff are arranged in a parallel state at the fixed portion at intervals along the lateral direction Y, so that the members are arranged in parallel at least in the center of the vertical direction X. In the region, the leak-proof cuff can be uniformly fitted to the wearer's body along the wearer's anterior-posterior direction corresponding to the longitudinal direction X, and the excrement can be placed outside the lateral direction at any part of the wearer's anterior-posterior direction. It is possible to prevent leakage (lateral leakage) to the direction.
Further, among the outward overhanging portions of the leak-proof cuff, the width along the horizontal direction in the vertical central region is configured to be smaller than the width along the horizontal direction in the vertical front region and the vertical rear region. For the wearer's abdomen and back, the contact area between the outer overhang and the wearer's skin can be increased to prevent lateral leakage of excrement from the abdomen and back, as well as the weight of the absorbent article. The lower crotch, which tends to hang down due to the weight of the excrement, increases the height and contraction force of the leak-proof cuff to improve the fit and effectively prevent lateral leakage of the excrement from the lower crotch.
Further, as a preferred embodiment of the present invention, the cuff forming sheet constituting the leak-proof cuff is formed by forming the second bent portion or the second bent portion and the third bent portion in the vertical central region of the leak-proof cuff. And elastic members overlap in the thickness direction, and the thickness, height, and shrinkage force of the leak-proof cuff can be increased in the vertical central region of the leak-proof cuff. As a result, the adhesion of the diaper at the inseam of the wearer can be further enhanced, and lateral leakage of excrement can be prevented more effectively.
In particular, since the plurality of elastic members constituting the leak-proof cuff are arranged in a parallel state with an interval along the lateral direction Y at the fixed portion, the second bent portion is provided between the adjacent elastic members. And the third bent portion can be easily formed along the vertical direction X, which is advantageous in that lateral leakage of excrement can be effectively prevented in a wide range along the front-back direction of the wearer.

As shown in FIG. 2, the second bent portion 50 is located between the free end portion 32 in the outward overhanging portion 3B and the elastic member 37 arranged closest to the free end portion 32. As a result, the cuff forming sheets are overlapped in the thickness direction, and the thickness is increased, so that it becomes easier to further improve the adhesion between the leak-proof cuff and the wearer's skin.
Further, as shown in FIG. 4A, the elastic member in which the second bent portion 50 extends in the vertical direction X and the second bent portion 50 is arranged closest to the free end portion 32 in the outward overhanging portion 3B. By being located between the 37 and the elastic member 37 arranged closest to the bent portion 35, the cuff forming sheets overlap in the thickness direction, and the leakage-proof cuff is worn by increasing the contraction force. It becomes easier to further improve the adhesion to the person's skin.
Further, as shown in FIG. 4B, the formation of the third bent portion 60 in addition to the second bent portion 50 causes the cuff forming sheet and the elastic member to overlap in multiple layers in the thickness direction and shrink. By improving the force, it becomes easy to further improve the adhesion between the leak-proof cuff and the wearer's skin.
Of these, by adopting the embodiment shown in FIG. 4B, it is advantageous because the adhesion between the leak-proof cuff and the wearer's skin can be remarkably improved.

From the viewpoint of making the effect of the present invention remarkable, it is preferable to use at least two types of elastic members 37 having different elongation stresses as the plurality of elastic members 37 arranged on the outer overhanging portion 3B of the leakage-proof cuff 3. .. In this case, in the elastic member 37 arranged on the outer overhanging portion 3B, the elongation stress of the elastic member 37 located inward in the lateral direction Y is larger than the elongation stress of the elastic member 37 located outside 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 outward overhanging portion 3B is extended to the maximum in the lateral direction Y. By using such an elastic member 37, when the diaper is worn, the second bent portion and the third bent portion can be easily formed in the vertical central region of the leak-proof cuff, and the adhesion at the inseam can be improved. It can be further increased and the lateral leakage of excrement can be prevented more effectively.

In order to make the elongation stress of the elastic member 37 located inward in the lateral direction Y higher than the elongation stress of the elastic member 37 located outward in the lateral direction Y in the outward overhanging portion 3B, for example, the outward overhanging portion 3B. These elastic members so that the extension ratio of the elastic member 37 located inside the lateral direction Y of the portion 3B is higher than the extension ratio of the elastic member 37 located outside the lateral Y of the outer overhanging portion 3B. It is preferable to arrange 37. When three or more elastic members 37 are arranged, the extension ratio of each elastic member 37 may be gradually increased from the lateral Y outward to the inward of the outer overhanging portion 3B. Alternatively, the elastic member 37 located at the innermost side in the lateral direction Y of the outer overhanging portion 3B may have the highest extension ratio, and the other elastic members 37 may have the same extension ratio.

The elongation ratio of each elastic member 37 can be measured by, for example, the following method. First, each elastic member 37 arranged on the outward overhanging portion 3B of the leak-proof cuff 3 is taken out, and each elastic member 37 is extended to the maximum in the longitudinal direction, and an oil-based pen is attached to each elastic member 37. Two marks are made by using L1 at regular intervals in the expansion / contraction direction. Next, the length L2 of the marked elastic member 37 is measured in a non-extended state. This measurement is performed three times for each elastic member 37, and the elongation ratio (times) is obtained from the arithmetic mean value of the values calculated by the formula represented by "L1 / L2". The interval L1 can be, for example, 100 mm.

The extension ratio of the elastic member 37 measured by the above-mentioned measuring method is such that the extension ratio of the elastic member 37 located inward in the lateral direction Y of the outer overhanging portion 3B is outward in the lateral direction Y of the outer overhanging portion 3B. 2. On condition that the elastic members 37 are arranged so as to be higher than the elongation ratio, they are independently, 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.

In place of or in addition to the above-mentioned form, the extensional stress of the elastic member 37 located inward in the lateral direction Y and the extensional stress of the elastic member 37 located outward in the lateral direction Y in the outward overhanging portion 3B. In order to make it higher than that, for example, the thickness of the elastic member 37 located inward in the lateral direction Y of the outer overhanging portion 3B is changed to the thickness of the elastic member 37 located in the lateral direction Y outward of the outer overhanging portion 3B. It is also preferable to arrange these elastic members 37 so as to be higher than the thickness. When three or more elastic members 37 are arranged, the thickness of each elastic member 37 may be gradually increased from the lateral Y outer side to the inner side of the outer overhanging portion 3B. Alternatively, the thickness of the elastic member 37 located at the innermost side in the lateral direction Y of the outer overhanging portion 3B may be the largest, and the thickness of the other elastic members 37 may be the same.
By using such an elastic member 37, the second bent portion and the third bent portion can be easily formed in the vertical central region of the leak-proof cuff when the diaper is worn, and the adhesion at the inseam can be easily formed. It is possible to further increase the amount of excrement and prevent lateral leakage of excrement more effectively.

The thickness of each elastic member 37 described above refers to the thickness of each elastic member in a non-extended state. When each elastic member 37 is thread-shaped, the diameter of the cross section of each elastic member 37 is measured at three different points for one elastic member 37, and is represented by an arithmetic mean value thereof. When each elastic member 37 has a band shape, the thickness of each elastic member 37 is calculated by measuring the length orthogonal to the extension direction on the main surface of the elastic member at three different points for one elastic member 37. Expressed as an average value. When each elastic member 37 is composed of a bundle of a plurality of elastic fibers, a sample obtained by cutting out the elastic member from the leakage-proof cuff to be measured to a certain length (example: 100 mm) is used as a sample. 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 measured by the above-mentioned measuring method in the non-extended state is such that the thickness of the elastic member 37 located inward in the lateral direction Y of the outward overhanging portion 3B is outward. In terms of fineness, each of them is independently, preferably 150 dtex or more, more preferably 300 dtex, on condition that they are arranged so as to be larger than the thickness of the elastic member 37 located on the lateral Y outer side of the overhanging portion 3B. The above is preferably 950 dtex or less, and more preferably 800 dtex or less.

Further, instead of or in addition to the above-mentioned form, in the outward overhanging portion 3B, the extensional 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 in the lateral direction Y outward. In order to make it higher than the stress, for example, the elastic modulus of the constituent resin of the elastic member 37 located inward in the lateral direction Y of the outward overhanging portion 3B is located in the lateral direction Y outside of the outward overhanging portion 3B. It is also preferable to arrange these elastic members 37 so as to have a higher elastic modulus than the elastic modulus of the constituent resin of the elastic member 37. When three or more elastic members 37 are arranged, the elastic modulus of the constituent resin of each elastic member 37 gradually increases from the lateral Y outward to the inward of the outer overhanging portion 3B. good. Alternatively, the elastic modulus of the constituent resin of the elastic member 37 located at the innermost side in the lateral direction Y of the outer overhanging portion 3B may be the largest, and the elastic modulus of the constituent resin of the other elastic member 37 may be the same. The elastic modulus described above is based on the premise that the elastic members 37 have the same thickness and the elongation ratios are the same.
By using such an elastic member 37, the second bent portion and the third bent portion can be easily formed in the vertical central region of the leak-proof cuff when the diaper is worn, and the adhesion at the inseam can be easily formed. It is possible to further increase the amount of excrement and prevent lateral leakage of excrement more effectively.

In any of the above-mentioned forms, as the resin constituting the elastic member 37, for example, natural rubber, EVA rubber, styrene-butadiene rubber, butadiene rubber, isoprene rubber, neoprene rubber and other synthetic rubbers can be used independently. Examples include polyurethane and thermoplastic elastomers. Examples of the thermoplastic elastomer include SBS (styrene-butadiene-styrene), SIS (styrene-isoprene-styrene), SEBS (styrene-ethylene-butadiene-styrene), and SEPS (styrene-ethylene-propylene-styrene). Examples thereof include olefin-based elastomers such as styrene-based elastomers, ethylene-based α-olefin elastomers and propylene-based elastomers obtained by copolymerizing ethylene, butene, octene and the like, polyester-based elastomers, and polyurethane-based elastomers. These constituent resins may be used alone or in combination of two or more. As the constituent resin of the elastic member 42, the above-mentioned one can be used in the same manner.

As the cuff forming sheet 30, a hydrophobic sheet material is preferably used from the viewpoint of surely fulfilling a role of preventing leakage of body fluid such as urine to the outside. Examples of the hydrophobic sheet material include non-woven fabrics, and more particularly, air-through non-woven fabrics, spunbonded non-woven fabrics, and melt-blown non-woven fabrics. Alternatively, a non-woven fabric having a multi-layer structure such as a spunbond-melt blown-spunbond non-woven fabric can be used. In addition to these, as the cuff forming sheet 30, a hydrophobic resin film, a laminate of the resin film and the non-woven fabric, and the like can be used.

Further, as the leak-proof cuff 3, the 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, a fiber made of an elastic resin such as a styrene-based elastomer, an olefin-based elastomer, a thermoplastic elastomer such as a polyester-based elastomer and a polyurethane-based elastomer, or an elastic resin such as rubber can be used. Further, as the sheet material, various non-woven fabrics described in the cuff forming sheet 30 can be used.

As described above, the leak-proof cuff 3 is preferably configured to include the elastic member 37 and the non-stretchable cuff-forming sheet 30 made of a non-woven fabric, and the cuff-forming sheet 30 constituting the leak-proof cuff 3. It is preferable that the ring crush compressive strength is in a predetermined range. Specifically, the cuff forming sheet 30 has a ring crush compressive strength measured by a method described later, preferably 10.0 N / 30 mm or less, more preferably 8.0 N / 30 mm or less, still more preferably 7.5 N /. It is preferably 30 mm or less, and the lower the lower limit is, the more preferable, but 1.0 N / 30 mm or more is realistic.
By having such physical properties, the cuff forming sheet 30 is easily bent by an external force, so that the leak-proof cuff 3 can be easily formed with the bent portion 35 and the outward overhanging portion 3B in the entire vertical direction X, and can be worn. It is possible to further improve the fit of the diaper in the entire area in the front-back direction of the person. Further, the second bent portion 50 and the third bent portion 60 can be easily formed in the vertical X central region of the leak-proof cuff, further enhancing the adhesion of the diaper at the wearer's inseam, and excrement. Lateral leakage can be prevented more effectively.

The ring crush compressive strength can be measured as follows. First, five cuff-forming sheets 30 constituting the leak-proof cuff 3 are cut into a rectangular shape having a length of 150 mm along the vertical direction X and a length of 30 mm along the horizontal direction Y, and these are used as test pieces. Each test piece is rolled into a cylinder in the longitudinal direction of the test piece, and one end and the other end of the test piece in the longitudinal direction are overlapped by 5 mm to form a cylinder having a diameter of 45 mm. Staples [for example, manufactured by Max Co., Ltd., No. 10-1M needle] is used to fasten to obtain 5 cylindrical measurement samples. The direction of the needle is parallel to the circumferential direction. Each of the obtained measurement samples (initial sample width; 30 mm) is set in a Tencilon compression tester (“RTA-100” manufactured by Orientec Co., Ltd.), and a circular compression plate with a diameter of 70 mm or more is used in the axial direction of the cylinder ( In the lateral direction of the sample), the maximum load (N / 30 mm) shown when compressed at a compression rate of 10 mm / min is measured. Similar measurements are made for the five measurement samples and their arithmetic mean is taken as the ring crush compression strength of the cuff forming sheet 30.

FIG. 5 schematically shows an 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 scattered on the condition that it is composed of a non-stretchable fiber sheet such as a non-woven fabric. It is preferable to have it in. In the high fiber density portion 80, as compared with other parts of the cuff forming sheet 30, the distance between the fibers constituting the sheet is shortened, or a part or all of the fiber structure disappears to form a film, so that the fibers are formed. It is a part where the density is high. By having such a configuration, the fold structure in which the high fiber density portion 80 having high fiber density and high rigidity as compared with other parts of the sheet material is the starting point of bending of the sheet material is formed. It is successfully formed on the leak-proof cuff 3. 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 subjecting the nonwoven fabric to be used by compaction processing such as embossing in advance, or by partially subjecting the nonwoven fabric to be entangled by a machine such as needle punching or spunlacing. be able to.

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

Further, when the high fiber density portion 80 is formed on the cuff forming sheet 30, as shown in FIG. 5, the distance W5 along the lateral direction Y between the adjacent elastic members 37 in the leakage-proof cuff 3 is the lateral direction Y. It is preferable that the distance between the high fiber density portions 80 adjacent to each other is larger than W6. With such a configuration, the sheet can be easily bent between the adjacent elastic members 37, so that the second bent portion 50 and the third bent portion 60 are successfully formed in the outward overhanging portion 3B. Become so. As a result, the fit between the central region of the vertical direction X and the inseam of the wearer is further improved, and lateral leakage of excrement can be prevented.

The distance W5 (see FIG. 5) between adjacent elastic members 37 along the lateral direction Y is preferably 1 mm or more, more preferably 2 mm or more, preferably 9 mm or less, still more preferably 10 mm or less. Further, the distance W6 (see FIG. 5) between the high fiber density portions 80 adjacent to each other 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. It is preferably 5.0 mm or less, more preferably 4.5 mm or less.

When the leak-proof cuff 3 includes an elastic member 37 and a cuff-forming sheet 30, as shown in FIG. 6, the outward overhanging portion 3B of each leak-proof cuff 3 is a cuff-forming sheet 30. It is preferable to have a joint portion 90 for joining the elastic member 37 and the elastic member 37. The portion where the joint portion 90 is formed is a portion where the elastic member 37 is fixed to the outward overhanging portion 3B. Each elastic member 37 in the present embodiment extends in the vertical direction X and is arranged in a parallel state at the forming portion of the joint portion 90 corresponding to the fixing portion of the elastic member 37, and the adjacent elastic members 37 are arranged in the lateral direction Y. They are arranged at intervals along. At the same time, it is also preferable that the joint portion 90 extends in the vertical direction X and is 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 overlapping with the position where the elastic member 37 is arranged in the thickness direction, and is not formed at the position where the elastic member 37 is not arranged. An adhesive or the like is typically arranged on the joint portion 90, and it is preferable that the joint portion 90 is formed at least at a position corresponding to the arrangement position of the elastic member 37 in the vertical X central region of the diaper 1. It is more preferable that the elastic member 37 is formed over the entire position corresponding to the arrangement position in the vertical direction X.
With such a configuration, even when the elastic member 37 is strongly fixed by the cuff forming sheet 30 and an external force is applied, the arrangement interval of the elastic member 37 along the lateral direction Y is set to the central region of the vertical direction X. , Preferably, it can be easily maintained constant over the entire vertical direction X. As a result, the leak-proof cuff can be uniformly fitted to the wearer's body along the wearer's anterior-posterior direction corresponding to the vertical direction X, and lateral leakage of excrement can be prevented at any part of the wearer's anterior-posterior direction. It can be effectively prevented.
In addition to this, since a portion having low rigidity can be formed in the portion of the outer overhanging portion 3B that does not have the joint portion 90, the portion that does not have the joint portion 90 becomes a flexible shaft and the sheet is easily bent. Become. As a result, the second bent portion 50 and the third bent portion 60 are successfully formed in the outward overhanging portion 3B, and the fit between the central region of the vertical direction X and the inseam of the wearer is further improved. , Side leakage of excrement can be prevented.

As the absorbent article having the above structure, a deployable disposable diaper has been described as an example, but any absorbent article having a leak-proof cuff can be applied. Examples of such absorbent articles include, but are not limited to, deployable disposable diapers, pants-type disposable diapers, incontinence pads, sanitary napkins, and the like.

Although the present invention has been described above based on the preferred embodiment thereof, the present invention is not limited to the above-described embodiment. For example, in the above-described embodiment, the embodiment in which the second bent portion 50 and the third bent portion 60 are not formed in the outer overhanging portion 3B located in the front region and the rear region of the diaper 1 in the vertical direction X will be described as an example. However, on condition that "length W1 <length W2" is satisfied, the second bent portion 50 and the third bent portion are formed on the outer overhanging portion 3B located in the front region and the rear region of the vertical direction X of the diaper 1. At least one of 60 may be formed.

Further, in the leak-proof cuff 3 in the present embodiment, as shown in FIGS. 2, 3 and 4, only the outer overhanging portion 3B protruding laterally Y outward from the bent portion 35 is formed. Instead of this, in addition to the outward overhanging portion 3B protruding outward in the lateral direction Y from the position of the bent portion 35, the inward overhanging portion protruding inward in the lateral direction Y from the position of the bent portion 35 is further added. It may be provided.

Further, the following absorbent articles are disclosed with respect to the above-described embodiment of the present invention.
<1>
An absorbent article having a vertical direction corresponding to the front-back direction of the wearer and a horizontal direction orthogonal to the vertical direction, and a pair of leak-proof cuffs extending in the vertical direction provided on the skin facing surface. The leak-proof cuff has a base end portion that is an upright end of the leak-proof cuff, a free end portion, and a bent portion that is located between the base end portion and the free end portion and extends in the vertical direction. Each of the leak-proof cuffs is located at a lower portion located between the base end portion and the bent portion, and is located between the bent portion and the free end portion, and extends outward in the lateral direction. The outer overhanging portion is divided into a lateral overhanging portion, and the outer overhanging portion has a plurality of elastic members extending in the vertical direction and arranged in an extended state. The width along the lateral direction in the central region is smaller than the width along the lateral direction in the longitudinal front region and the longitudinal rear region, and at least in the longitudinal central region, each elastic member is at least in the longitudinal direction. A part of the elastic member is fixed to the outer overhanging portion, and the elastic members adjacent to each other along the width direction are arranged in parallel at a space where the elastic member is fixed. , Absorbent goods.

<2>
The leak-proof cuff has a second bent portion extending in the vertical direction between the free end portion and the bent portion, and the second bent portion is the free end portion and the free end portion. The outer overhanging portion is located between the elastic member arranged closest to the elastic member, and the outer overhanging portion is an outer region located between the free end portion and the second bent portion in the vertical central region. The absorbent article according to <1>, wherein the absorbent article stands up toward the wearer's body side or is folded back inward in the lateral direction.
<3>
The leak-proof cuff has a second bent portion extending in the vertical direction between the free end portion and the bent portion, and the second bent portion is arranged closest to the free end portion. Located between the elastic member and the elastic member arranged closest to the bent portion, the outward overhanging portion is located in the vertical central region of the free end portion and the second bent portion. The absorbent article according to <1>, wherein the outer region located between the portions stands up toward the wearer's body side or is folded back 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>
The <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 portion and the bent portion and the outer region. The absorbent article according to any one of the above.
<6>
The leak-proof cuff has a second bent portion and a third bent portion extending in the vertical direction between the free end portion and the bent portion, respectively, and the second bent portion is closer to the free end portion. The third bent portion is located closer to the bent portion, and the outer overhanging portion is located between the bent portion and the second bent portion in the central region in the vertical direction. The area is folded inward in the lateral direction, and the outer area located between the second bent portion and the free end is folded outward in the lateral direction. The absorbent article according to <1> above.
<7>
Each leak-proof cuff is configured to include the elastic member and a cuff-forming sheet made of a non-woven fabric, and the cuff-forming sheet has a plurality of high fiber density portions in a scattered pattern and is adjacent to each other. The absorbent article according to any one of <1> to <6>, wherein the distance between the members along the lateral direction is larger than the distance between the high fiber density portions adjacent to each other in the lateral direction.

<8>
The absorbent article according to any one of <1> to <7>, wherein at least two kinds of elastic members having different elongation stresses are arranged.
<9>
Each leak-proof cuff is configured to include the elastic member and a cuff-forming sheet, and each leak-proof cuff has a joint portion for joining 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 intermittently formed 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. 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 so as to deviate from the lateral center of the leakage-proof cuff toward the free end portion.
<12>
The absorbent article according to any one of <1> to <10>, wherein the bent portion is located so as to deviate from the lateral center of the leakage-proof cuff toward the base end portion.
<13>
The absorbent article according to any one of <1> to <12>, wherein the outward overhanging portion projects outward in the lateral direction from the position of the bent portion.
<14>
The absorbent article according to any one of <1> to <13>, wherein the outward overhanging portion is formed in the entire vertical direction of the leak-proof cuff.

<15>
The absorbent article according to any one of <1> to <14>, wherein the elastic member extends to the front region and the rear region in the vertical direction together with the central region in the vertical direction.
<16>
The width of the outward overhanging portion along the horizontal direction continuously increases when viewed from the central portion in the vertical direction along the front region in the vertical direction and the rear region in the vertical direction. > To the absorbent article according to any one of <15>.
<17>
In the natural state of the absorbent article, the length W1 of the outward overhanging portion in the vertical central region along the lateral direction is 4 mm or more and 24 mm or less, preferably 9 mm or more and 19 mm or less. The absorbent article according to any one of <16>.
<18>
The length W2 of the outer overhanging portion in the longitudinal front region and the longitudinal rear region along the lateral direction is 5 mm or more and 25 mm or less, preferably 10 mm or more and 20 mm or less, said <1> to <17>. The absorbent article according to any one of the above.
<19>
At the portion where the elastic member is fixed, the first virtual line along the extending direction of any of the elastic members and the second virtual line along the extending direction of the elastic member adjacent to the elastic member are mutually aligned. The absorbent article according to any one of <1> to <18>, wherein the absorbent article does not intersect and the angle between the first virtual line and the second virtual line is within 2 °.
<20>
The absorbent article according to <19>, wherein the angle between the first virtual line and the second virtual line is within 1 °.

1 Absorbent article 2 Absorbent body 3 Leakage-proof cuff 30 Cuff forming sheet 31 Base end 32 Free end 35 Bending part 37 Elastic member 3A Lower part 3B Outer overhanging part 50 Second bending part 60 Third bending part 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-back direction of the wearer and a horizontal direction orthogonal to the vertical direction, and 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 base end portion that is an upright end of the leak-proof cuff, a free end portion, and a bent portion that is located between the base end portion and the free end portion and extends in the vertical direction. Have and
Each of the leak-proof cuffs is located at a lower portion located between the base end portion and the bent portion, and is located between the bent portion and the free end portion, and extends outward in the lateral direction. It is divided into overhanging parts and
The outward overhanging portion has a plurality of elastic members extending in the vertical direction and arranged in an extended state.
In the natural state, the width of the outer overhanging portion along the horizontal direction in the central region in the vertical direction is smaller than the width along the horizontal direction in the front region in the vertical direction and the rear region in the vertical direction.
At least in the central region in the vertical direction, at least a part of each elastic member in the vertical direction is fixed to the outward overhanging portion, and the elastic member is adjacent to the elastic member along the width direction at the fixed portion. An absorbent article in which the matching elastic members are arranged in parallel at intervals. The leak-proof cuff has a second bent portion extending in the vertical direction between the free end portion and the bent portion.
The second bent portion is located between the free end portion and the elastic member arranged closest to the free end portion.
In the outward overhanging portion, in the vertical central region, the outer region located between the free end portion and the second bent portion stands up toward the wearer's body side, or said. The absorbent article according to claim 1, which is folded inward in the lateral direction. The leak-proof cuff has a second bent portion extending in the vertical direction between the free end portion and the bent portion.
The second bent portion is located between the elastic member arranged closest to the free end portion and the elastic member arranged closest to the bent portion.
In the outward overhanging portion, in the vertical central region, the outer region located between the free end portion and the second bent portion stands up toward the wearer's body side, or said. The absorbent article according to claim 1, which is folded inward in the lateral direction. The leak-proof cuff has a second bent portion and a third bent portion extending in the vertical direction between the free end portion and the bent portion, respectively.
The second bent portion is located near the free end portion, and the third bent portion is located near the bent portion.
In the outward overhanging portion, the inner region located between the bent portion and the second bent portion is folded back inward in the lateral direction in the central region in the vertical direction, and the second portion is formed. 2. The absorbent article according to claim 1, wherein the outer region located between the bent portion and the free end portion is folded outward in the lateral direction. Each leakage-proof cuff is configured to include the elastic member and a cuff-forming sheet made of a non-woven fabric.
The cuff forming sheet has a plurality of high fiber density portions in a scattered pattern.
The absorbent article according to any one of claims 1 to 4, wherein the distance between the adjacent elastic members along the lateral direction is larger than the distance between the adjacent high fiber density portions in the lateral direction. The absorbent article according to any one of claims 1 to 5, wherein at least two kinds of elastic members having different elongation stresses are arranged. Each leak-proof cuff is configured to include the elastic member and a cuff forming sheet.
Each leakage-proof cuff has a joint portion for joining 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 leak-proof cuff is configured to include 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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