CN117580558A

CN117580558A - Absorbent article

Info

Publication number: CN117580558A
Application number: CN202280043361.7A
Authority: CN
Inventors: 王建伟; 藏前亮太; 恩田蓝子
Original assignee: Kao Corp
Current assignee: Kao Corp
Priority date: 2021-06-18
Filing date: 2022-06-17
Publication date: 2024-02-20
Also published as: JP2023000881A; WO2022265089A1

Abstract

The absorbent article (1) of the present invention has a longitudinal direction (X) and a width direction (Y), and comprises an absorbent main body (2) having a front sheet (3), a back sheet (4) and an absorber (5), and a leakage preventing cuff. The leak-proof flange is provided with an inner leak-proof flange (8) and an outer leak-proof flange (9). Each leakage preventing cuff has opposed nonwoven fabrics and elastic members extending in the longitudinal direction between the nonwoven fabrics in an elongated state. The inner leakage preventing cuff (8) has a region overlapping the absorbent body (5) on each skin-facing surface and non-skin-facing surface of the absorbent body (5) in a plan view in a maximum extension state. The liquid impermeable sheet (85) disposed on the inner side leakage preventing cuff (8) is disposed at least in a part of the overlapping region of the skin-facing surface of the inner side leakage preventing cuff (8) and the absorbent body (5) and is disposed over the entire overlapping region of the non-skin-facing surface of the inner side leakage preventing cuff (8) and the absorbent body (5) in a plan view in a maximum extension state.

Description

Absorbent article

Technical Field

The present invention relates to an absorbent article.

Background

The absorbent article is typically composed of an absorber mainly composed of a water-absorbent material such as pulp or a water-absorbent polymer, and a leakage preventing cuff.

In addition, the applicant proposes a disposable diaper comprising: an absorber having a central absorber, a pair of side absorbers, and a cut-off portion; and a cover sheet covering the whole of the absorbent body, wherein the cover sheet on the skin contact surface side and the cover sheet on the non-skin contact surface side at the cut-off portion are bonded and fixed by an adhesive (see patent document 1).

Further, the present applicant has proposed an absorbent article comprising an absorbent main body including an absorbent core, and inner three-dimensional folds arranged on both sides of the absorbent main body, and outer three-dimensional folds located on the outer side in the width direction from the inner three-dimensional folds, wherein a water repellent film is arranged continuously from the non-skin contact surface side of the absorbent core to each fold (see patent document 2).

Patent document 3 discloses an absorbent article in which an uppermost sheet is rolled back from both side portions of a main body of the article to adhere to an end outer surface of a waterproof film, and a fixed end portion of a three-dimensional fold is adhered to an end outer surface of the uppermost sheet rolled back.

Prior art literature

Patent literature

Patent document 1: japanese patent laid-open No. 2006-247363

Patent document 2: japanese patent laid-open No. 2013-252323

Patent document 3: japanese patent laid-open publication No. 2005-65729

Disclosure of Invention

The present invention relates to an absorbent article having a longitudinal direction corresponding to the front-back direction of a wearer and a width direction orthogonal thereto, and comprising: an absorbent body having a front sheet, a back sheet, and an absorber; and a leakage preventing cuff extending in a length direction.

In one embodiment, the leakage-proof cuff preferably has: a pair of inner side leakage-proof flanges extending in the length direction and being stretchable in the length direction; and an outer leakage-proof flange extending in the length direction and being stretchable in the length direction.

In one embodiment, each of the leakage preventing cuffs preferably has a pair of nonwoven fabrics facing each other, and an elastic member disposed in an elongated state so as to extend in the longitudinal direction between the nonwoven fabrics.

In one embodiment, the inner leakage preventing cuff preferably has a region overlapping the absorbent body in each of the skin-facing surface and the non-skin-facing surface of the absorbent body in a plan view in a maximum extension state of the absorbent article.

In one embodiment, it is preferred that the inner containment flaps also have a liquid impermeable sheet.

In one embodiment, the liquid-impermeable sheet is preferably disposed on the inner side leakage-proof cuff so as to be located at least in a part of a region where the inner side leakage-proof cuff overlaps the skin-facing surface of the absorbent body when viewed from above in a state of maximum extension of the absorbent article, and the liquid-impermeable sheet is preferably disposed on the inner side leakage-proof cuff so as to be located over the entire region where the inner side leakage-proof cuff overlaps the non-skin-facing surface of the absorbent body when viewed from above in a state of maximum extension of the absorbent article.

Drawings

Fig. 1 is a perspective view schematically showing a loose state of a pants-type disposable diaper according to an embodiment of the absorbent article of the present invention.

Fig. 2 is a developed plan view schematically showing the skin-facing surface side (topsheet side) of the absorbent article shown in fig. 1 in a developed and maximally extended state.

Fig. 3 is a sectional view schematically showing an I-I section of the absorbent article shown in fig. 2.

Fig. 4 is a sectional view schematically showing a section I-I of the absorbent article shown in fig. 2 in a relaxed state.

Fig. 5 is a cross-sectional view schematically showing another embodiment of the absorbent article of the present invention in a relaxed state.

Fig. 6 is a cross-sectional view schematically showing still another embodiment of the absorbent article of the present invention in a relaxed state.

Fig. 7 is a cross-sectional view schematically showing still another embodiment of the absorbent article of the present invention in a relaxed state.

Fig. 8 is a cross-sectional view schematically showing still another embodiment of the absorbent article of the present invention in a relaxed state.

Fig. 9 is a cross-sectional view schematically showing still another embodiment of the absorbent article of the present invention in a relaxed state.

Fig. 10 is a cross-sectional view schematically showing still another embodiment of the absorbent article of the present invention in a relaxed state.

Fig. 11 is a cross-sectional view schematically showing still another embodiment of the absorbent article of the present invention in a relaxed state.

Detailed Description

The absorbent articles described in patent documents 1 and 2 are absorbent articles excellent in side leakage prevention performance and leakage prevention performance, but there is room for improvement in terms of reducing the uncomfortable feeling to the leg caused by the hardening of the fold. In addition, the absorbent article described in patent document 3 has difficulty in improving leakage resistance and reducing uncomfortable feeling.

The invention provides an absorbent article which combines the improvement of side leakage prevention of body fluid and the reduction of uncomfortable feeling when being worn.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. Fig. 1 to 4 show one embodiment of a pants-type disposable diaper as a preferred embodiment of the absorbent article of the present invention.

As shown in fig. 1 and 2, a pants-type disposable diaper (hereinafter simply referred to as "diaper") 1 as an absorbent article includes: an abdomen-side region F disposed on the abdomen side of the wearer and a back-side region R disposed on the back side when the wearer wears the device; and a crotch region M located between the regions of the ventral region F and the dorsal region R. The diaper 1 has a longitudinal direction X extending from the abdomen side to the back side of the wearer through the crotch portion and a width direction Y orthogonal thereto, corresponding to the front-back direction of the wearer. The abdomen-side region F, the crotch region M, and the back-side region R extend continuously along a longitudinal direction X, which is the front-back direction of the wearer. The crotch region M has a excretory part opposing part (not shown) which is disposed to oppose the excretory part of the wearer when the diaper 1 is worn.

In the present specification, the "skin-facing surface" is a surface of the absorbent article or a component (e.g., absorber) thereof that faces the skin side of the wearer when the absorbent article is worn, i.e., is relatively close to the skin side of the wearer, and the "non-skin-facing surface" is a surface of the absorbent article or a component thereof that faces the opposite side of the skin side when the absorbent article is worn, i.e., is relatively far from the skin of the wearer. The term "during wearing" as used herein refers to a state in which a normal proper wearing position, that is, a correct wearing position of the absorbent article is maintained.

As shown in fig. 1 and 2, the diaper 1 has: an absorbent body 2 capable of absorbing and retaining excrement; and an outer body 10 disposed on the non-skin-facing side of the absorbent main body 2. The outer body 10 is a member forming the outer shape of the diaper 1. The peripheral edges of the outer body 10 form the contour lines of the abdomen-side region F and the back-side region R of the diaper 1, respectively. The exterior body 10 includes: an abdomen-side outer body 10F disposed in the abdomen-side region F and extending in the width direction Y; and a rear outer case 10R which is separate from the rear outer case and extends in the width direction Y and is disposed in the rear region R. That is, the diaper 1 of the present embodiment is a disposable diaper known as a divided pant type diaper. The absorbent main body 2 extends in the longitudinal direction X over the entire region from the abdominal region F to the back region R, and is disposed so as to span between the abdominal outer covering 10F and the back outer covering 10R disposed at a predetermined interval in the longitudinal direction X. However, instead of the present embodiment, the outer body 10 may be configured to be disposed continuously over the entire areas of the abdomen-side region F, the crotch region M, and the back-side region R of the outer surface of the diaper 1.

The diaper 1 is formed with a pair of side seals S, S formed by joining the two side portions of the abdomen-side casing 10F in the width direction Y and the two side portions of the back-side casing 10R in the width direction Y to each other. Thus, the outer packages 10F and 10R are annularly connected. The diaper 1 is formed with a waist opening WH through which the waist of the wearer passes and a pair of leg openings LH through which the lower limbs of the wearer pass. The side seal S is formed by a bonding method such as an adhesive, heat sealing, or ultrasonic sealing.

In the present specification, the "maximum extension state" of the absorbent article or the diaper 1 means a state in which the diaper 1 is cut at the side seal S to be unfolded, and the elastic members of each portion of the diaper 1 in the unfolded state are maximally extended to be expanded to the design dimension, that is, to be the same as the dimension when being expanded to the planar shape in a state in which the influence of all the elastic members is removed. The "relaxed state" of the absorbent article (diaper 1) refers to a state in which the absorbent article is not stretched without applying an external force to the elastic members disposed on the absorbent article.

The absorbent body 2 includes: a liquid-permeable front sheet 3 disposed in a position relatively close to the skin of the wearer; a back sheet 4 which is disposed at a position relatively distant from the skin of the wearer and is liquid-impermeable or liquid-impermeable (hereinafter, also referred to as "liquid-resistant" collectively) or water-repellent; and an absorber 5 disposed between the two sheets 3, 4. These members constituting the absorbent main body 2 are integrated with each other by a known joining method such as an adhesive.

As the front sheet and the back sheet, materials conventionally used for absorbent articles such as disposable diapers can be used without particular limitation. For example, various nonwoven fabrics and the like can be used as the front sheet. As the back sheet, a nonwoven fabric having liquid resistance or water repellency, a resin film, a laminate of a resin film and a nonwoven fabric, or the like can be used. The package sheet may be a sheet similar to the front sheet. The sheet for forming the leak-proof flange can be the same as the back sheet.

As shown in fig. 3 and 4, the front sheet 3 crosses the skin-facing surface side of the absorbent body 5 in the width direction Y, and the extension portions 3E of the front sheet 3 from both side edges of the absorbent body 5 in the longitudinal direction X are rolled toward the non-skin-facing surface side of the absorbent body 5.

In the present embodiment, the pair of extending portions 3E and 3E of the front sheet 3 are fixed between the absorbent body 5 and a leak-proof cuff forming sheet 80 described later at first base end portions 81 of the leak-proof cuffs 8 described later. The front sheet 3 does not cover the entire area of the non-skin-facing surface of the absorbent body 5, and the central portion (the portion between the pair of first base end portions 81, 81) in the width direction Y of the non-skin-facing surface of the absorbent body 5 is not covered by the front sheet 3.

In the present embodiment, the front sheet 3 has a size capable of covering the entire area of the skin-facing surface of the absorber 5, and covers the skin-facing surface of the absorber 5 and both side edges of the absorber 5 along the longitudinal direction X so as to extend over the entire area thereof, and covers a predetermined area from the both side edges to the inner side in the width direction Y of the non-skin-facing surface of the absorber 5. The front sheet 3 of the present embodiment is a flat sheet having no concave-convex shape, but instead of this configuration, a sheet having a concave-convex shape formed by including a plurality of convex portions and concave portions located at the periphery of the convex portions on the surface may be used,

the absorbent body 5 typically includes an absorbent core 6 having a single-layer structure or a laminated structure and a core wrap (not shown) covering the absorbent core 6. The absorber 5 is disposed at least in the crotch region M, and is disposed continuously to at least one of the abdominal region F and the back region R outside the crotch region M. In the present embodiment, as shown in fig. 2, the absorber 5 has a rectangular shape in a plan view, and is disposed in the whole of the abdomen-side region F, the crotch region M, and the back-side region R in a state where the longitudinal direction of the absorber 5 coincides with the longitudinal direction X of the diaper 1.

The absorbent core 6 includes at least one of a fiber-like body of water-absorbent natural fibers such as pulp fibers, a mixed fiber-like body containing water-absorbent natural fibers and a water-absorbent polymer, and/or an absorbent sheet having 2 fiber sheets that are the same or different and particles of a water-absorbent polymer disposed between the fiber sheets, for example. When the absorbent core includes both the core and the absorbent sheet, the absorbent core may have the same size in plan view or may have different sizes. The core-spun sheet is formed of cotton paper and water-permeable nonwoven fabric. The core wrap preferably covers the entirety of the skin-facing side and the non-skin-facing side of the absorbent core.

The diaper 1 of the present embodiment is provided with a pair of inner leakage preventing cuffs 8, 8 as leakage preventing cuffs on both sides of the absorbent body 2 in the longitudinal direction X independently of the absorbent body 2. The inner leakage preventing cuff 8 is configured to extend in the longitudinal direction X and to be stretchable in the longitudinal direction.

Each of the inner side leakage preventing cuffs 8 includes a pair of leakage preventing cuff forming sheets 80 which are liquid-resistant or water-repellent and breathable, respectively. The pair of leak-proof cuff forming sheets 80 may include one portion of the sheet 80 which is folded and opposed in the longitudinal direction, or may be constituted by 2 or more sheets 80. The inner leakage preventing cuff 8 of the present embodiment is formed of one leakage preventing cuff forming sheet 80 which is folded and opposed in the longitudinal direction. Each of the inner leakage preventing cuffs 8 extends along the longitudinal direction X and is continuously disposed along the side portion of the absorbent main body 2 along the longitudinal direction X over substantially the entire length of the longitudinal direction X of the absorbent main body 2.

As the leak-proof cuff forming sheet 80, a sheet used as a material of leak-proof cuffs in such an absorbent article as a nonwoven fabric or the like can be used without particular limitation, and for example, a single-layer or multi-layer water repellent nonwoven fabric, a laminate of a resin film and a nonwoven fabric or the like can be used.

The inner side leakage preventing cuff 8 has a first base end portion 81 where the leakage preventing cuff forming sheet 80 is fixed to another member, and a first standing portion 82 where the sheet 80 stands up toward the wearer. The first rising portion 82 constitutes a free end portion of the inner side leakage preventing cuff 8, and is a non-fixed portion of the leakage preventing cuff forming sheet 80 with other members. The first rising portion 82 exists at least in the crotch region M.

The first base end portion 81 is a portion that becomes an upright end when the first upright portion 82 is raised toward the skin side of the wearer during wearing of the diaper 1, and is a portion where the leak-proof cuff forming sheet 80 such as nonwoven fabric is fixed to other members, specifically, to the constituent members of the absorbent main body 2 and/or the outer body 10 by a known fixing method such as an adhesive or heat fusion. The first base end portion 81 extends continuously or discontinuously in the longitudinal direction X over substantially the entire length of the longitudinal direction X of the leak-proof cuff forming sheet 80. The first base end portion 81 is located on the non-skin-facing side of the absorbent body 5.

The first rising portion 82 is configured to extend in the longitudinal direction X and to be stretchable in the longitudinal direction.

In the present embodiment, as shown in fig. 2 and 3, a plurality of leakage preventing cuff forming elastic members 83 are disposed in an elongated state so as to extend in the longitudinal direction X on the side of the free end portion of the first rising portion 82 near the free end. The elastic members 83 are fixed in an elongated state between the leak-proof cuff forming sheets 80, 80 which are two-folded in the longitudinal direction X by a fixing method such as an adhesive. The elastic members 83 are independently disposed at least in the crotch region M. In the present embodiment, both ends of each elastic member 83 extend independently to both ends in the longitudinal direction X of the inner leakage preventing cuff 8, and are disposed continuously in the abdomen-side region F, the crotch region M, and the back-side region R.

The number of the elastic members 83 is not particularly limited, and may be 1 or a plurality of elastic members.

With the above-described structure, the inner leakage preventing cuff 8 has a region having stretchability in the longitudinal direction X at least at the free end portion where the elastic member 83 is disposed. In addition, with the above-described configuration, when the diaper 1 is viewed from above in its maximum extension state, the first base end portion 81 is positioned on the non-skin-facing surface side of the absorber 5, and at least the free end portion of the first standing portion 82 on which the elastic member 83 is disposed is positioned on the skin-facing surface side of the absorber 5. That is, in a top view in the maximum extension state of the diaper 1, the inner leakage preventing cuffs 8 have regions overlapping the absorbent body 5 on the skin-facing surface and the non-skin-facing surface of the absorbent body 5, respectively.

As shown in fig. 4, the inner leakage preventing cuff 8 is preferably divided into a lower region 8b located on the first base end portion 81 side and an upper region 8u located on the free end side of the first rising portion 82, between the first base end portion 81 and the free end of the first rising portion 82, by bending a bending portion 8f extending in the longitudinal direction X to the outside in the width direction Y. Thus, the free end portion of the first standing portion 82 is formed so as to protrude outward in the width direction Y in the relaxed state of the absorbent article. The elastic member 83 is disposed at a portion of the upper region 8u extending outward in the width direction Y, and the upper region 8u has stretchability in the longitudinal direction. By forming such a structure, the upper region 8u can be brought into contact with the skin surface of the wearer, and therefore, the body fluid can be reduced from flowing out of the diaper beyond the inner leakage preventing cuff.

In the embodiment shown in fig. 4, at least in the crotch region M, the bent portion 8f is located further inward in the width direction Y than the free end of the first rising portion 82 in the inner leakage preventing cuff 8 in which the bent portion 8f is bent. Thus, in the relaxed state of the diaper 1, the inner leakage preventing cuff 8 is bent at the bent portion 8f, and the free end portion including the free end of the first rising portion 82 extends outward in the width direction Y. The lower region 8b and the upper region 8u each extend along the longitudinal direction X, and each have a substantially rectangular shape in plan view.

As shown in fig. 2, it is preferable that the inside leakage preventing flanges 8 are formed with standing-up preventing portions 88 as portions for preventing the leakage preventing flanges 80 from standing up at both ends in the longitudinal direction X. The pair of standing block portions 88 is formed in the abdomen side region F and the back side region R, respectively, and a portion along the longitudinal direction sandwiched by the two standing block portions 88, 88 is the first standing portion 82. The standing barrier 88 is typically formed by fixing the leak-proof cuff-forming sheet 80 to the front sheet 3 located on the skin-facing side of the absorbent main body 2.

By forming a pair of rising barrier portions 88 at both end portions in the longitudinal direction X of the inner leakage preventing cuff 8, the first rising portion 82, which is a portion sandwiched between the two rising barrier portions, rises toward the skin side of the wearer with the first base end portion 81 as a rising base end by the contraction force of the leakage preventing cuff forming elastic member 83 when the diaper 1 is worn. In such a raised state of the inner leakage preventing cuff 8, the raised first raised portion 82 prevents movement of bodily fluids such as urine excreted by the wearer to the outside in the width direction Y, and thus side leakage in the crotch region M can be effectively suppressed particularly.

In addition, although not shown, in the raised state of the inner leakage preventing cuff 8, the entire diaper 1 is curved and deformed so that the central portion in the longitudinal direction X of the absorbent main body 2 protrudes toward the non-skin-facing surface side (back sheet 4 side) by the contraction force of the leakage preventing cuff forming elastic member 83, and therefore the diaper 1 is easily fitted to the body shape of the wearer.

As the leakage preventing cuffs, the diaper 1 has a pair of outer leakage preventing cuffs 9 extending in the longitudinal direction at least in both side regions in the width direction Y of the crotch region M. In the developed and maximum-extension state of the diaper shown in fig. 2 and 3, the outer leakage preventing cuffs 9 are individually located outside the inner leakage preventing cuffs 8 in the width direction Y, and are configured to extend in the longitudinal direction X and be stretchable in the longitudinal direction. The outer leakage preventing cuffs 9 are formed so as to be parallel to the inner leakage preventing cuffs 8 in the maximum extension state of the diaper. The outer leakage preventing cuffs 9 are disposed on the non-skin-facing side of the absorbent main body 2.

The outer side leakage preventing cuffs 9 each independently include an outer side leakage preventing cuff forming sheet 90 such as a nonwoven fabric having liquid resistance or water repellency and air permeability, similar to the inner side leakage preventing cuffs 8. As shown in the present embodiment, the pair of outer leakage preventing cuff forming sheets 90 may be configured such that one sheet 90 includes two opposed portions along the longitudinal direction, or may be configured by 2 or more sheets 90 instead of this configuration. The outer leakage preventing cuffs 9 are continuously disposed in the longitudinal direction at both side portions in the width direction Y of the absorbent main body 2 at least over the entire crotch region M.

The outer leakage preventing cuff 9 has a second base end portion 91 at which the outer leakage preventing cuff forming sheet 90 is fixed to another member, and a second standing portion 92 at which the sheet 90 can stand up toward the wearer, similarly to the inner leakage preventing cuff 8. The second rising portion 92 is a non-fixed portion of the other members in the outer leakage preventing cuff forming sheet 90. The second rising portion 92 exists at least in the crotch region M.

The second base end portion 91 is a portion that becomes an upright base end when the second upright portion 92 is raised toward the skin side of the wearer during wearing of the diaper 1, and is a portion where the outer leak-proof cuff forming sheet 90 such as nonwoven fabric is joined to other members, specifically, to the non-skin-facing surface side of the absorbent main body 2. The second base end portion 91 extends continuously or discontinuously in the longitudinal direction X over substantially the entire length of the longitudinal direction X of the outer leakage preventing cuff forming sheet 90. In the present embodiment, the second base end portion 91 is formed at a position overlapping the first base end portion 81 in a plan view.

The second rising portion 92 is configured to extend in the longitudinal direction X and to be stretchable in the longitudinal direction.

In the present embodiment, as shown in fig. 3, one or more outer leakage preventing cuff forming elastic members 93 are disposed in an elongated state so as to extend along the longitudinal direction X at the free end portion of the second rising portion 92 (hereinafter, also referred to as "second free end portion"). The elastic members 93 are fixed in an elongated state between the outer leakage preventing cuff forming sheets 90 which are two-folded in the longitudinal direction X by a fixing method such as an adhesive. In the present embodiment, one end portion of each elastic member 93 is located in the abdomen-side region F, and the other end portion is located in the back-side region R, and each elastic member 93 is continuously disposed in the abdomen-side region F, the crotch region M, and the back-side region R.

Thus, the second rising portion 92 is a region having stretchability in the longitudinal direction X at least at the free end portion where the elastic member 93 is disposed.

As described above, by forming the outer leakage preventing cuff 9, the second rising portion 92 rises toward the skin side of the wearer with the second base end portion 91 as the rising base end by the contraction force of the leakage preventing cuff forming elastic member 93 when the diaper 1 is worn, as in the inner leakage preventing cuff 8. In the raised state of the outer side leakage preventing cuff 9, the raised second raised portion 92 can effectively prevent the excreted body fluid (excreted liquid) that has moved unintentionally further outward in the width direction Y than the raised inner side leakage preventing cuff 8 from leaking out of the absorbent article. As a result, side leakage in the crotch region M can be effectively suppressed in particular.

Returning to the explanation of the inner side leakage preventing cuff 8, the inner side leakage preventing cuff 8 preferably has a liquid impermeable sheet 85 in addition to the leakage preventing cuff forming sheet 80. This can prevent side leakage of body fluid, and can allow the absorber to efficiently absorb body fluid. As the liquid-impermeable sheet 85, for example, a fibrous sheet such as a nonwoven fabric or a resin film having liquid resistance or water repellency and air permeability similar to the leak-proof cuff forming sheet 80 can be used.

In a plan view in the maximum extension state of the diaper 1, the liquid-impermeable sheet 85 is preferably disposed in the inner side leakage-proof cuff 8 so as to be located in at least a part of the region where the inner side leakage-proof cuff 8 overlaps the skin-facing surface of the absorber 5, and so as to be located in the entire region where the inner side leakage-proof cuff 8 overlaps the non-skin-facing surface of the absorber 5. That is, in a plan view in the maximum extension state of the diaper 1, the liquid-impermeable sheet 85 is preferably overlapped with the absorbent body 5 in each of the skin-facing surface and the non-skin-facing surface of the absorbent body 5.

An example of the arrangement of the liquid-impermeable sheet 85 is shown in fig. 3 and 4. The liquid-impermeable sheet 85 is composed of a first liquid-impermeable sheet 86 disposed in the inner leakage preventing cuff 8, and a second liquid-impermeable sheet 87 which is separate from the first liquid-impermeable sheet 86 and extends from both ends in the width direction Y of the back sheet 4. The liquid-impermeable sheets 86 and 87 are each independently disposed at least in the crotch region M, and extend to both end edges in the longitudinal direction X, as in the inner leakage-preventing cuffs 8, and are preferably disposed continuously in the abdomen-side region F, crotch region M, and back-side region R. Each of the liquid impermeable sheets 86, 87 is joined to at least the leakage preventing cuff forming sheet 80. The joining method and the joining portion of each of the liquid-impermeable sheets 86, 87 and the leak-proof cuff forming sheet 80 are not particularly limited as long as the effect of the present invention can be obtained.

The first liquid-impermeable sheet 86 preferably has a portion between the leak-proof cuff forming sheets 80 such as nonwoven fabric disposed in the inner leak-proof cuff 8, and as shown in the present embodiment, the first liquid-impermeable sheet 86 is preferably disposed entirely between the leak-proof cuff forming sheets 80 such as nonwoven fabric disposed in the inner leak-proof cuff 8. By forming such a structure, the uncomfortable feeling caused by the contact of the first liquid-impermeable sheet 86 with the skin of the wearer can be reduced, and the ability of preventing side leakage of body fluid can be further improved.

The second liquid-impermeable sheet 87 in the present embodiment is integrally formed with the back sheet 4. The back sheet 4 of the present embodiment is disposed between the inner leakage preventing cuff 8 and the outer leakage preventing cuff 9. By forming such a structure, not only in the crotch region M where body fluid is discharged, but also in the abdomen-side region F and the back-side region R, side leakage through the inner leakage preventing cuff 8 can be reduced, and the side leakage preventing performance of the entire diaper 1 can be further improved.

As shown in the present embodiment, when there is a portion where the liquid impermeable sheet 85 is integrally formed so as to extend from the back sheet 4, the back sheet 4 is formed as a sheet which is located in the center region in the width direction Y and is disposed between the pair of second base end portions 91, 91. The liquid-impermeable sheet 85 is formed as a sheet located outside the second base end portion 91 in the width direction Y. This description is common throughout the present specification.

As shown in the present embodiment, when the first liquid-impermeable sheet 86 and the second liquid-impermeable sheet 87 are disposed as the liquid-impermeable sheet 85, as shown in fig. 3, in a cross-sectional view of the diaper 1 in the maximum extension state, it is preferable that the end portion 4e of the second liquid-impermeable sheet 87 is located outside the end portion 8s of the first liquid-impermeable sheet 86 located inside in the width direction Y. By forming such a structure, the liquid-impermeable sheets 86 and 87 are formed in the overlapping portions in a plan view, so that the leakage of body fluid from the inside of the inner leakage preventing cuff 8 to the outside of the diaper can be further reduced, and the side leakage preventing performance of the entire diaper 1 can be further improved.

When the first liquid-impermeable sheet 86 and the second liquid-impermeable sheet 87 are disposed as the liquid-impermeable sheet 85, the length W1 (see fig. 4) of the portion in the width direction Y of the portion where the liquid-impermeable sheets 86 and 87 overlap in plan view is preferably 1mm or more, more preferably 5mm or more, preferably 50mm or less, and even more preferably 30mm or less, in the plan view in the maximum extension state of the diaper 1.

When the liquid impermeable sheet 85 has a portion between the leak-proof cuff forming sheets 80 such as nonwoven fabric disposed in the inside leak-proof cuff 8, the free end portion of the inside leak-proof cuff 8 preferably has a portion where the liquid impermeable sheet 85 is not present, and more preferably has a portion where the liquid impermeable sheet 85 is not present in the end region including the free end of the free end portion. In the present embodiment, the end portion 8g of the first liquid-impermeable sheet 86 located on the outer side in the width direction Y is disposed so as not to reach the free end of the inner side leakage preventing cuff 8, and thus a portion where the liquid-impermeable sheet 85 is not present is formed in the end region including the free end of the inner side leakage preventing cuff 8. The end region including the free end of the inner leakage preventing cuff 8 is formed at least in the crotch region M, has a predetermined width from the free end inward in the width direction Y, and extends in the longitudinal direction X.

Since the free end of the inner side leakage preventing cuff 8 is a portion that is easily brought into contact with the skin of the wearer, such a structure can further improve the flexibility of the inner side leakage preventing cuff 8 and further reduce the uncomfortable feeling when the absorbent article is worn.

Further embodiments for the inner leakage-proof cuff 8 and the liquid-impermeable sheet 85 are shown in fig. 5 to 11. In any case, the liquid-impermeable sheet 85 is a sheet that is positioned at least in a part of the region where the inner side leakage preventing cuff 8 overlaps the skin-facing surface of the absorbent body 5 and is positioned over the entire region where the inner side leakage preventing cuff 8 overlaps the non-skin-facing surface of the absorbent body 5 in a plan view in the maximum extension state of the absorbent article. In the embodiments shown in fig. 5 to 11, for convenience of explanation, the inner side leakage preventing flange 8 and the outer side leakage preventing flange 9 of one side in the width direction are mainly illustrated, and each illustrated embodiment is applicable to the inner side leakage preventing flange 8 and the outer side leakage preventing flange 9 of the other side as well.

In the embodiment shown in fig. 5, the liquid-impermeable sheet 85 is integrally formed so as to extend outward in the width direction Y from the back sheet 4. In the present embodiment, the liquid impermeable sheet 85 is disposed between the leak-proof cuff forming sheets 80 such as nonwoven fabric in each of the inner leak-proof cuffs 8. The liquid-impermeable sheet 85 in one inner side leakage-preventing cuff 8 is integrally disposed with the liquid-impermeable sheet 85 in the inner side leakage-preventing cuff 8 of the other diaper 1 via the back sheet 4 located in the central region in the width direction Y. Alternatively, the first liquid-impermeable sheet 86 and the second liquid-impermeable sheet 87 extending from the back sheet 4 may be disposed separately between the leak-proof cuff forming sheets 80. The inner leakage preventing cuff 8 of the present embodiment is folded outward in the width direction Y at a folded portion 8f, and is divided into a lower region 8b and an upper region 8u. In the upper region 8u, the first liquid-impermeable sheet 86 has a portion disposed between the leak-proof cuff forming sheets 80. With this structure, the effects of preventing leakage and reducing discomfort during wearing can be achieved.

In the embodiment shown in fig. 6, as in the embodiment shown in fig. 4, there are provided a first liquid-impermeable sheet 86 disposed in the inner leakage-preventing cuff 8 and a second liquid-impermeable sheet 87 separate from the sheet 86. The second liquid-impermeable sheet 87 is integrally formed so as to extend outward in the width direction Y from the back sheet 4. In the present embodiment, the inner leakage preventing cuff 8 is not formed with the bent portion 8f, and the free end portion of the inner leakage preventing cuff 8 does not protrude outward in the width direction Y. The end portion 4e of the second liquid-impermeable sheet 87 is located outside the end portion 8s of the first liquid-impermeable sheet 86 located inside in the width direction Y. The end 8s of the first liquid-impermeable sheet 86 located on the inner side in the width direction Y is the end on the first base end 81 side of the inner leakage preventing cuff 8, and the end 8g of the first liquid-impermeable sheet 86 located on the outer side in the width direction Y is the end on the free end side of the inner leakage preventing cuff 8. The end portion 8g of the first liquid-impermeable sheet 86 located on the outer side in the width direction Y reaches the region where the elastic member 83 is disposed, but does not reach the free end of the inner side leakage preventing cuff 8. With this structure, the effects of preventing leakage and reducing discomfort during wearing can be achieved.

In the embodiment shown in fig. 7, as in the embodiment shown in fig. 4, there are provided a first liquid-impermeable sheet 86 disposed in the inner leakage-preventing cuff 8 and a second liquid-impermeable sheet 87 separate from the sheet 86. The second liquid-impermeable sheet 87 is integrally formed so as to extend outward in the width direction Y from the back sheet 4. The inner leakage preventing cuff 8 of the present embodiment is folded outward in the width direction Y at a folded portion 8f, and is divided into a lower region 8b and an upper region 8u. The end portion 4e of the second liquid-impermeable sheet 87 is located outside the end portion 8s of the first liquid-impermeable sheet 86 located inside in the width direction Y. The end portion 8g of the first liquid-impermeable sheet 86 located outside in the width direction Y is located inside the region where the elastic member 83 is arranged in the width direction Y. Such a structure can also sufficiently provide leakage prevention and an effect of reducing uncomfortable feeling when worn.

In the embodiment shown in fig. 8, as in the embodiment shown in fig. 4, there are provided a first liquid-impermeable sheet 86 and a second liquid-impermeable sheet 87 disposed on the inner leakage-preventing cuff 8. The second liquid-impermeable sheet 87 is integrally formed so as to extend outward in the width direction Y from the back sheet 4. The inner leakage preventing cuff 8 of the present embodiment is folded outward in the width direction Y at a folded portion 8f, and is divided into a lower region 8b and an upper region 8u. The position of the end portion 4e of the second liquid-impermeable sheet 87 overlaps with the position of the end portion 8s of the first liquid-impermeable sheet 86 located inside in the width direction Y in a plan view or is located inside in the width direction Y from the end portion 8 s. With this structure, the effects of preventing leakage and reducing discomfort during wearing can be achieved.

In the embodiment shown in fig. 9, the inner leakage preventing cuff 8 includes a first liquid impermeable sheet 86 and a second liquid impermeable sheet 87 that is separate from the first liquid impermeable sheet 86. In the relaxed state of the diaper, the first liquid-impermeable sheet 86 is disposed so as to have a portion exposed on the inner side surface in the width direction Y of the inner leakage preventing cuff 8. The inner leakage preventing cuff 8 of the present embodiment is folded outward in the width direction Y at the folded portion 8f, and is divided into a lower region 8b and an upper region 8u, and the first liquid impermeable sheet 86 has a portion disposed between the leakage preventing cuff forming sheets 80 in the upper region 8u. Such a structure also has the effects of preventing leakage and reducing uncomfortable feeling during wearing.

In the embodiment shown in fig. 10, as in the embodiment shown in fig. 9, there are provided a first liquid-impermeable sheet 86 disposed in the inner leakage-preventing cuff 8 and a second liquid-impermeable sheet 87 separate from the sheet 86. In the relaxed state of the diaper, the first liquid-impermeable sheet 86 is disposed so as to have a portion exposed on the inner side surface in the width direction Y of the inner leakage preventing cuff 8. The inner leakage preventing cuff 8 of the present embodiment is folded outward in the width direction Y at a folded portion 8f, and is divided into a lower region 8b and an upper region 8u. In the upper region 8u, the first liquid-impermeable sheet 86 is not disposed between the leak-proof cuff forming sheets 80. With such a configuration, the effects of preventing leakage and reducing the uncomfortable feeling during wearing can be achieved.

In the embodiment shown in fig. 11, 2 leak-proof cuff forming sheets 80 are arranged so as to face each other, and a first liquid impermeable sheet 86 is arranged between the sheets 80. Other configurations can be applied to the description of the embodiment shown in fig. 3 and 4. With this structure, the effects of preventing leakage and reducing discomfort during wearing can be achieved.

The arrangement of the inner side leakage preventing cuff 8 and the liquid impermeable sheet 85 shown in fig. 3 and 4 is more preferable from the viewpoint of achieving both the advantage of further improving the fit to the wearer, the advantage of further effectively preventing the side leakage of body fluid due to the leakage over the upper portion of the inner side leakage preventing cuff 8 or through the constituent members of the inner side leakage preventing cuff 8, and the advantage of improving the softness of the absorbent article when worn and effectively reducing the uncomfortable feeling such as stiffness.

As described above, the diaper 1 has the outer body 10 disposed on the non-skin-facing side of the absorbent core 6. The exterior body 10 of the present embodiment includes a ventral exterior body 10F disposed in a ventral region F and a dorsal exterior body 10R disposed in a dorsal region R separately therefrom. In the developed and maximum-extension state of the diaper 1 shown in fig. 2, the outer body 10 has a rectangular shape in which the length in the width direction Y is longer than the length in the length direction X in both end regions in the length direction X corresponding to the back side region R, and is disposed in a central region in the length direction X corresponding to the crotch region M so that both side edge portions of the central region along the length direction X are curved.

The outer body 10 is disposed at a relatively distant position from the absorber 5, and includes an outer layer sheet 11 forming the outer surface of the diaper 1, and an inner layer sheet 12 forming the inner surface of the diaper 1 disposed at a relatively close position to the absorber 5. The two sheets 11 and 12 are joined to each other by an adhesive, fusion, or the like to be integrated.

In the present embodiment, waistline wrinkles are formed in the ventral region F and the dorsal region R. The waistline gather includes an outer body 10 and a plurality of waistline gather-forming elastic members 13 fixed to the outer body 10. The plurality of elastic members 13 extend in the width direction Y and are arranged at intervals in the longitudinal direction X. The waistline gather is produced by fixing the elastic member 13 in a state of being elongated in the width direction Y between the outer sheet 11 and the inner sheet 12 constituting the outer body 10, and then releasing the elastic member 13 from the elongated state. This allows the outer package 10 to exhibit stretchability in the width direction Y. Further, when the diaper 1 is worn, the waist gather is formed in a substantially continuous loop shape over the entire circumference of the diaper 1 by contraction of the elastic members 13.

In the present embodiment, leg gathers are formed in leg edges forming opening edges of each of the pair of leg openings LH, LH. The leg gathers include an outer body 10 and leg gather forming elastic members 14 fixed to the outer body 10. The leg gathers are produced by fixing the elastic member 14 in an extended state between the outer sheet 11 and the inner sheet 12 constituting the outer body 10, and then releasing the elastic member 14 from the extended state. When the diaper 1 is worn, the elastic members 14 contract, so that substantially continuous annular leg gathers are formed over the entire periphery of the opening edge portions of the leg opening portions LH. The number of the elastic members 14 may be 1 or a plurality.

The two sheets 11 and 12 constituting the exterior body 10 may be the same kind of sheets as each other, or may be different kinds of sheets. The sheets 11, 12 may have stretchability, particularly in the width direction Y. As the sheets 11, 12, nonwoven fabrics by various production methods can be used, and specifically, for example, a single-layer nonwoven fabric or a laminate nonwoven fabric of 2 or more layers composed of a hot air nonwoven fabric, a hot-rolled nonwoven fabric, a spun-laced nonwoven fabric, a spun-bond nonwoven fabric, a melt-blown nonwoven fabric, or the like can be exemplified. The sheets 11 and 12 may be composite sheets in which these nonwoven fabrics and films are laminated and integrated.

As shown in fig. 2, in the maximum extension state of the absorbent article (diaper 1), it is preferable that the leakage preventing cuff forming elastic member 83 included in the inner leakage preventing cuff 8 and the outer leakage preventing cuff forming elastic member 93 included in the outer leakage preventing cuff 9 are disposed so as not to intersect each other. In the present embodiment, in the maximum extension state of the diaper 1, the outer leakage preventing cuffs 9 are located at positions where the two leakage preventing cuffs 8, 9 do not overlap each other in both sides of the inner leakage preventing cuffs 8 in the width direction Y. By forming such a structure, the inner leakage preventing cuff 8 and the outer leakage preventing cuff 9 stand up independently, and are easily adhered to the skin of the wearer, so that leakage preventing performance of excreted liquid is further improved.

As the material of the various elastic members in the diaper 1, various known elastic materials commonly used in such an absorbent article can be used without particular limitation unless otherwise specified. Examples of the thermoplastic resin include synthetic rubber such as styrene-butadiene, isoprene, and chloroprene rubber, natural rubber, EVA, stretchable polyolefin, and polyurethane. As the form of each elastic member, a linear elastic member having a rectangular, square, circular, polygonal cross section or the like (such as a rubber thread) or a belt (such as a flat rubber), a multifilament linear elastic member or the like can be preferably used independently.

As shown in fig. 4, the outer leakage preventing cuff 9 has a second base end 91 as a rising end and a free end including a free end of the second rising portion 92, and is preferably formed so that the free end of the second rising portion 92 including the elastic member 93 protrudes outward in the width direction Y in a relaxed state of the absorbent article, as in the case of the inner leakage preventing cuff 8. With such a configuration, the portion of the outer leakage preventing cuff 9 protruding outward in the width direction Y can be brought into contact with the skin surface of the wearer, so that the adhesion of the leakage preventing cuff can be improved, and leakage of excreta liquid unintentionally flowing out from the inner leakage preventing cuff 8 can be further effectively reduced.

As shown in fig. 4, the outer leakage preventing cuff 9 is formed between the second base end portion 91 and the free end of the second rising portion 92, and is folded outward in the width direction Y at a second folded portion 9f extending in the longitudinal direction X, and is divided into a second lower region 9b located on the second base end portion 91 side and a second upper region 9u located on the free end side of the second rising portion 92. This embodiment is also applicable to the embodiments shown in fig. 5 to 11.

In the relaxed state of the diaper 1, the second folded portion 9f is located at a position inside the free end of the second standing portion 92 in the width direction Y in the outer leakage preventing cuff 9 folded at least in the crotch region M. The elastic member 93 is disposed at a portion protruding outward in the width direction Y in the second upper region 9u. Thus, in the relaxed state of the diaper 1, the outer leakage preventing cuff 9 is bent at the second bending portion 9f, and the free end portion of the second rising portion 92 extends outward in the width direction Y. The second lower region 9b and the second upper region 9u each extend along the longitudinal direction X, and each are formed in a substantially rectangular shape in a plan view.

The diaper 1 of each of the above embodiments has been described as a form in which the stretchable region is not provided in the absorbent body 5, but may be configured such that an elastic member or the like is disposed in the absorbent body 5 as necessary, and the absorbent body 5 has stretchability.

As such a mode, for example, a configuration in which a pair of side elastic members for making the widthwise side portions of the absorber 5 easily stand up is arranged in an elongated state at both side edges of the absorbent core 6 of the absorber 5 in the longitudinal direction X is possible. Such side elastic members are preferably disposed at least in the crotch region M, and more preferably, both ends of the side elastic members are disposed continuously in the abdomen-side region F, crotch region M, and back-side region R so as to extend to both end edges in the longitudinal direction X of the absorbent core 6. At least both ends of the side elastic members are fixed to at least the absorbent body 5 by a known fixing method such as an adhesive. The number of the side elastic members may be 1 or more.

The side elastic members are fixed in an elongated state to both side portions in the width direction Y of the absorber 5, and the both side portions in the width direction Y of the absorber 5 stand up toward the skin side of the wearer when the diaper 1 is worn. The rising portion blocks movement of body fluid in the width direction Y, and can prevent side leakage of body fluid.

The absorbent core 6 preferably has curved guide portions extending in the longitudinal direction X at positions inside both side portions in the width direction Y thereof. The curved guide portion is a portion that functions as a flexible shaft when the lateral side portion of the absorbent core 6 in the width direction is raised toward the skin side of the wearer in the relaxed state of the diaper, and is the same portion as the starting point of the rising of the absorbent body 5 including the absorbent core 6. The bending guide portion can be formed by, for example, forming a difference in rigidity or density in the absorbent core 6. This can improve the rising property of the absorber 5, reduce the movement of the excreted liquid in the width direction, and further improve the liquid absorption performance.

The diaper 1 having the above preferred embodiment is configured to further improve the fit and softness of the absorbent article when the absorbent article is worn, and to reduce the uncomfortable feeling such as stiffness when the diaper is worn.

The diaper 1 according to the above embodiment is formed such that the outer body 10 is separated into the abdomen-side outer body and the back-side outer body, and instead of this configuration, the outer body 10 may be formed such that it extends continuously from the abdomen-side region F to the back-side region R.

In order to improve the flexibility of the inner side leakage preventing cuff 8 and further improve the fit to the wearer, one or more second leakage preventing cuff forming elastic members are preferably further disposed in the intermediate region between the free end of the first rising portion 82 and the first base end portion 81. In this case, the second leakage preventing cuff forming elastic member is disposed so as to extend in the longitudinal direction X, and is fixed in an elongated state between the pair of opposing leakage preventing cuff forming sheets 80 by a fixing method such as an adhesive. The second leakage preventing cuff forming elastic member is preferably disposed at least in the crotch region M.

The present invention has been described based on the embodiments, and the present invention is not limited to the embodiments described above and can be appropriately modified. All of the above embodiments can be appropriately combined with each other and used.

With respect to the above embodiments, the following absorbent articles are further disclosed.

<1>

An absorbent article having a longitudinal direction corresponding to a front-rear direction of a wearer and a width direction orthogonal thereto, and comprising: an absorbent body having a front sheet, a back sheet, and an absorber; and a leakage prevention cuff extending in a longitudinal direction, wherein, in the absorbent article,

the leakage-proof flange has: a pair of inner side leakage-proof flanges extending in the length direction and being stretchable in the length direction; and an outer leakage-proof flange extending along the length direction and being telescopic in the length direction,

each of the leakage preventing cuffs has a pair of opposed nonwoven fabrics, and elastic members disposed in an elongated state so as to extend in a longitudinal direction between the nonwoven fabrics,

the inner leakage preventing cuff has a region overlapping the absorbent body in each of the skin-facing surface and the non-skin-facing surface of the absorbent body in a plan view in a maximum extension state of the absorbent article,

the inner leak-proof flange is also provided with a liquid-impermeable sheet,

the liquid-impermeable sheet is disposed on the inner side leakage-proof flange so as to be located in at least a part of a region where the inner side leakage-proof flange overlaps the skin-facing surface of the absorbent body when viewed from above in a state of maximum extension of the absorbent article, and the liquid-impermeable sheet is disposed on the inner side leakage-proof flange so as to be located in the entire region where the inner side leakage-proof flange overlaps the non-skin-facing surface of the absorbent body when viewed from above in a state of maximum extension of the absorbent article.

<2>

The absorbent article according to item <1>,

the liquid-impermeable sheet is disposed so as to overlap the absorbent body in each of the skin-facing surface and the non-skin-facing surface of the absorbent body in a plan view in the maximum extension state of the absorbent article.

<3>

The absorbent article according to the above <1> or <2>,

at both longitudinal ends of the inner leakage preventing cuff, a rising prevention portion is formed as a portion for preventing the nonwoven fabric from rising.

<4>

The absorbent article according to any one of the above items <1> to <3>,

the outer leakage preventing cuff is disposed on a non-skin-facing side of the absorbent main body,

the back sheet is disposed between the inner leakage preventing cuff and the outer leakage preventing cuff.

<5>

The absorbent article according to any one of the above items <1> to <4>,

the liquid-impermeable sheet has: a first liquid impermeable sheet disposed on the inner side leakage-preventing cuff; and second liquid-impermeable sheets extending from both ends in the width direction of the back sheet,

the second liquid-impermeable sheet is integrally formed so as to extend outward in the width direction from the back sheet.

<6>

The absorbent article according to the above <5>,

Has a ventral region arranged on the ventral side of the wearer when worn, a dorsal region arranged on the dorsal side, and a crotch region between the ventral region and the dorsal region,

each liquid-impermeable sheet is independently disposed at least in the crotch region.

<7>

The absorbent article according to the above <5> or <6>,

each liquid-impermeable sheet is continuously disposed in the abdomen-side region, the crotch region, and the back-side region so as to extend to both end edges in the longitudinal direction.

<8>

The absorbent article according to any one of the above items <5> to <7>,

the inner leakage preventing flange is provided with a bending part which bends the free end part to the outer side in the width direction between the base end part which is a standing end and the free end part which comprises the free end,

the position of the end portion of the second liquid-impermeable sheet overlaps with the position of the end portion of the first liquid-impermeable sheet located on the inner side in the width direction in a plan view, or is located on the inner side in the width direction than the end portion of the first liquid-impermeable sheet located on the inner side in the width direction.

<9>

The absorbent article according to any one of the above items <5> to <7>,

the end portion of the second liquid-impermeable sheet is located at a position on the outer side in the width direction than the inner side end portion in the width direction of the first liquid-impermeable sheet when viewed in cross section in the maximum extension state of the absorbent article.

<10>

The absorbent article according to item <9> above,

in a plan view of the absorbent article in a maximum extension state, the length W1 in the width direction of the portion where the liquid-impermeable sheets overlap in a plan view is preferably 1mm or more, more preferably 5mm or more,

the length W1 is preferably 50mm or less, more preferably 30mm or less.

<11>

The absorbent article according to the above <9> or <10>,

the end portion of the second liquid-impermeable sheet is disposed at a position outside in the width direction than the end portion of the first liquid-impermeable sheet located inside in the width direction,

the end portion of the first liquid-impermeable sheet located on the outer side in the width direction is located on the inner side in the width direction than the region of the inner side leakage preventing cuff where the elastic member is disposed.

<12>

The absorbent article according to any one of the above items <9> to <12>,

the first liquid-impermeable sheet is disposed entirely between the nonwoven fabrics of the inner side leakage-preventing cuffs.

<13>

The absorbent article according to the above <9> or <10>,

in a relaxed state of the diaper, the first liquid-impermeable sheet is disposed so as to have a portion exposed to the inner side in the width direction of the inner side leakage preventing cuff,

the first liquid-impermeable sheet has a portion disposed between the nonwoven fabrics in the free end portion of the inner leakage preventing cuff.

<14>

The absorbent article according to the above <9> or <10>,

the first liquid-impermeable sheet has a portion not disposed between the nonwoven fabrics in the free end portion of the inner leakage preventing cuff.

<15>

The absorbent article according to any one of the above items <1> to <14>,

the inner leak-proof flange has: a base end portion which becomes a standing end; a free end portion comprising a free end; and a bending portion extending in a longitudinal direction between the base end portion and the free end portion,

The bending portion is bent outward in the width direction and is divided into a lower region located on the base end portion side and an upper region located on the free end side.

<16>

The absorbent article of item <15>,

in a relaxed state of the absorbent article, the free end portion in the inner leakage preventing cuff is formed so as to protrude outward in the width direction.

<17>

The absorbent article of item <16>,

the elastic member in the inner leakage preventing cuff is disposed at a portion of the upper region extending outward in the width direction,

the upper region is formed to have stretchability in the longitudinal direction.

<18>

The absorbent article according to any one of the above items <15> to <17>,

in the upper region, the first liquid-impermeable sheet has a portion disposed between the nonwoven fabrics in the inner leakage-preventing cuffs.

<19>

The absorbent article according to the above <9> or <10>,

the inner leakage preventing flange is arranged between a base end part which is a standing end and a free end part which comprises a free end, a bending part which bends the free end part to the outer side in the width direction is not formed,

The end portion of the second liquid-impermeable sheet is disposed so as to be located outside the end portion of the first liquid-impermeable sheet located inside in the width direction,

the end portion of the first liquid-impermeable sheet located on the outer side in the width direction is disposed so as to reach the region of the inner side leakage-preventing cuff where the elastic member is disposed and not to reach the free end of the inner side leakage-preventing cuff.

<20>

The absorbent article according to any one of the above items <1> to <4>,

the liquid-impermeable sheet formed so as to extend outward in the width direction from the back sheet is disposed between the nonwoven fabrics in the respective inner side leakage-preventing cuffs,

the liquid-impermeable sheet in one of the inner side leakage-preventing cuffs is integrally formed with the liquid-impermeable sheet in the other inner side leakage-preventing cuff via the back sheet.

<21>

The absorbent article of <20>,

the liquid-impermeable sheets are disposed between the nonwoven fabrics in the inner leakage-preventing cuffs.

<22>

The absorbent article according to any one of the above items <1> to <21>,

the inner leakproof flange is formed by two opposite non-woven fabrics which are folded along the length direction.

<23>

The absorbent article according to any one of the above items <1> to <22>,

the inner leakage preventing cuff is formed by disposing 2 nonwoven fabrics in a facing manner.

<24>

The absorbent article according to any one of the above items <1> to <23>,

the liquid-impermeable sheet has a portion disposed between the nonwoven fabrics in the inner leakage-preventing cuffs.

<25>

The absorbent article according to any one of the above items <1> to <24>,

the inner leakage preventing cuff has a base end portion and a free end portion which are standing ends,

the free end portion has a portion where the liquid-impermeable sheet is absent.

<26>

In the absorbent article of <25>,

the end region including the free end in the free end has a portion where the liquid-impermeable sheet is not present.

<27>

In the absorbent article of <25> or <26>,

an end region including a free end of the inner leakage preventing cuff is formed at least in the crotch region, and extends in the longitudinal direction with a predetermined width inward in the width direction from the free end.

<28>

The absorbent article according to any one of the above items <25> to <27>,

one or more elastic members are disposed in an elongated state between the nonwoven fabrics in an intermediate region between the base end portion and the free end portion of the inner leakage preventing cuff.

<29>

The absorbent article according to any one of the above items <1> to <28>,

in the maximum extension state of the absorbent article, the elastic member in the inner leakage preventing cuff and the elastic member in the outer leakage preventing cuff are arranged in a state of not intersecting each other.

<30>

The absorbent article according to any one of the above items <1> to <29>,

the outer leakage-proof flange has a second base end portion which becomes a standing end and a second free end portion which includes a free end,

in the relaxed state of the absorbent article, the second free end portion is formed so as to protrude outward in the width direction.

<31>

The absorbent article according to any one of the above items <1> to <30>,

the absorbent body further has an elastic member disposed at least in the crotch region, and is configured to have stretchability.

<32>

The absorbent article according to any one of the above items <1> to <31>,

the absorbent body is provided with an absorbent core,

the absorbent body is configured to have stretchability by disposing a pair of side elastic members in an elongated state at both longitudinal side edges of the absorbent core.

<33>

The absorbent article according to any one of the above items <1> to <32>,

the absorbent body is provided with an absorbent core,

the absorbent core has curved guide portions extending in the longitudinal direction at positions inside both side portions in the width direction thereof,

the curved guide portion is configured to function as a flexible shaft when the lateral side portion of the absorbent core is raised toward the skin side of the wearer in a relaxed state of the absorbent article.

Industrial applicability

According to the present invention, an absorbent article that can improve both prevention of side leakage of body fluid and reduction of discomfort during wearing can be provided.

Claims

1. An absorbent article having a longitudinal direction corresponding to a front-rear direction of a wearer and a width direction orthogonal thereto, and comprising: an absorbent body having a front sheet, a back sheet, and an absorber; and a leakage prevention cuff extending in a length direction, the absorbent article characterized in that:

the inner leak-proof flange is also provided with a liquid-impermeable sheet,

2. The absorbent article of claim 1, wherein:

3. The absorbent article of claim 1 or 2, wherein:

4. An absorbent article according to any one of claims 1 to 3, wherein:

5. The absorbent article of any one of claims 1-4, wherein:

6. The absorbent article of claim 5, wherein:

7. The absorbent article of claim 6, wherein:

8. The absorbent article of any one of claims 5-7, wherein:

9. The absorbent article of any one of claims 5-7, wherein:

10. The absorbent article of claim 9, wherein:

11. The absorbent article of claim 9 or 10, wherein:

12. The absorbent article of claim 9, wherein:

13. The absorbent article of claim 9, wherein:

14. The absorbent article of any one of claims 1-13, wherein:

15. The absorbent article of claim 14, wherein:

16. The absorbent article of claim 15, wherein:

17. The absorbent article of any one of claims 14-16, wherein:

18. The absorbent article of claim 9, wherein:

19. The absorbent article of any one of claims 1-4, wherein:

20. The absorbent article of claim 19, wherein:

21. The absorbent article of any one of claims 1-20, wherein:

22. The absorbent article of any one of claims 1-21, wherein:

23. The absorbent article of any one of claims 1-22, wherein:

24. The absorbent article of any one of claims 1-23, wherein:

25. The absorbent article of claim 24, wherein:

26. The absorbent article of claim 24 or 25, wherein:

27. The absorbent article of any one of claims 24-26, wherein:

28. The absorbent article of any one of claims 1-27, wherein:

29. The absorbent article of any one of claims 1-28, wherein:

30. The absorbent article of any one of claims 1-29, wherein:

31. The absorbent article of any one of claims 1-30, wherein:

the absorbent body is provided with an absorbent core,

32. The absorbent article of any one of claims 1-31, wherein:

the absorbent body is provided with an absorbent core,