JP7315379B2 - absorbent article - Google Patents

Description

The present invention relates to absorbent articles.

Absorbent articles such as disposable diapers typically include an absorbent body containing absorbent materials such as hydrophilic fibers and water-absorbing polymers, a surface sheet arranged closer to the wearer's skin than the absorbent body, and a leak-proof sheet arranged farther from the wearer's skin than the absorbent body. Since the outer surface and the inner surface of the absorbent article are made of a sheet member, irregularities such as wrinkles and folds may be formed on the outer surface or the inner surface. For example, Patent Document 1 describes an absorbent article that includes an inner sheet on the outer surface of an absorbent body and an outermost sheet on the outer surface of the inner sheet, and unevenness is formed on the outermost sheet by wrinkling of the inner sheet.

In addition, the present applicant has previously proposed a pants-type absorbent article that is fixed to the outside of an absorbent main body and has an elastic outer body formed with folds extending in the longitudinal direction of the article, the height of the folds being higher in the side regions located laterally of the central region than in the central region in the width direction of the article (Patent Document 2).

Patent Document 3 describes an underpants-type disposable diaper that includes a skin-side sheet provided with a plurality of projections formed along the longitudinal direction, and an abdominal elastic region and a back elastic region that stretch in the lateral direction, and in which the maximum interval between a plurality of wrinkles formed longitudinally outward of the absorbent core is greater than a predetermined pitch of the projections formed in the central portion in the longitudinal direction when these elastic regions are contracted.

Japanese Patent Application Laid-Open No. 2007-111503 JP 2015-100587 A JP 2017-153735 A

In general absorbent articles such as diapers, from the viewpoint of improving fit to the wearer's skin, elastic members are arranged in a stretched state in the region arranged on the abdomen of the wearer and the region arranged around the legs of the wearer. Due to the contraction of the elastic member, waist gathers and leg gathers are formed as large irregularities on the outer surface of the absorbent article. Such large unevenness tends to be formed in an irregular shape, and depending on the shape of the unevenness, the fit to the wearer's skin and the texture of the outer surface of the absorbent article may be affected. None of the above patent documents disclose a technology capable of controlling the shape of gathers (unevennesses) formed by elastic members.

Accordingly, an object of the present invention is to control the shape of the gathers formed on the outer surface of the absorbent article and to provide an absorbent article excellent in fit and feel.

The present invention is an absorbent article comprising an absorbent main body including a liquid-permeable surface sheet, an absorbent body and a leak-proof sheet, having a longitudinal direction corresponding to the front-rear direction of a wearer and a width direction orthogonal to the longitudinal direction, and having an abdominal region, a crotch region and a dorsal region along the longitudinal direction, wherein the absorbent body is arranged from the abdominal region to the dorsal region,
The absorbent main body has a pair of side flap portions extending outward in the width direction from both side edges of the absorbent body from the ventral region to the dorsal region, and a waist flap portion extending in the longitudinal direction from the longitudinal edge of the absorbent body in the dorsal region,
An exterior sheet is disposed on the non-skin facing side of the absorbent body, and the exterior sheet has a ridge-groove shape in which longitudinal ridges and longitudinal grooves extending in the longitudinal direction are alternately formed,
An elastic member for forming leg gathers is arranged in each of the pair of side flap portions in a stretched state so as to extend in the longitudinal direction through the crotch region, or an elastic member for forming waist gathers is arranged in a stretched state so as to extend in the width direction on the waist flap portion,
The present invention provides an absorbent article in which the ridge-shaped region of the outer sheet and the elastic member for forming leg gathers or the elastic member for forming waist gathers are overlapped in the thickness direction of the absorbent article.

The present invention also provides an absorbent main body including a liquid-permeable surface sheet, an absorbent body, and a leak-proof sheet, having a longitudinal direction corresponding to the front-rear direction of the wearer and a width direction orthogonal to the longitudinal direction, and having an abdominal region, a crotch region, and a dorsal region along the longitudinal direction, wherein the absorbent body is arranged from the abdominal region to the dorsal region,
The absorbent main body has a pair of side flap portions extending outward in the width direction from both side edges of the absorbent body from the ventral region to the dorsal region, and a waist flap portion extending in the longitudinal direction from the longitudinal edge of the absorbent body in the dorsal region,
An exterior sheet is arranged on the non-skin facing side of the absorbent main body, and the exterior sheet has a ridge groove shape in which width direction ridges and width direction grooves extending in the width direction are alternately formed,
An elastic member for forming leg gathers is arranged in each of the pair of side flap portions in a stretched state so as to extend in the longitudinal direction through the crotch region, or an elastic member for forming waist gathers is arranged in a stretched state so as to extend in the width direction on the waist flap portion,
An absorbent article, wherein a region of the outer sheet in which the groove shape is formed and the elastic member for forming leg gathers or the elastic member for forming waist gathers are overlapped in the thickness direction of the absorbent article.

ADVANTAGE OF THE INVENTION According to this invention, the shape of the gathers formed in the outer surface of an absorbent article is controlled, and the absorbent article which is excellent in fitting property or a touch is provided.

FIG. 1 is a developed plan view schematically showing the skin-facing surface side (inner surface side) in an unfolded and stretched state in one embodiment of the absorbent article of the present invention. FIG. 2 is a cross-sectional view of the absorbent article shown in FIG. 1 taken along line II-II. FIG. 3 is a diagram showing the arrangement of the ridged groove structure, the elastic members for forming waist gathers, and the elastic members for forming leg gathers in the outer sheet shown in FIG. 4(a) is a cross-sectional view along the width direction of the exterior sheet and the waist gather forming elastic member shown in FIG. 3, and FIG. 4(b) is a cross-sectional view along the longitudinal direction of the exterior sheet and the waist gather forming elastic member shown in FIG. FIG. 5 is an explanatory diagram for explaining the effect of the present invention on the waist flap portion of the absorbent article shown in FIG. FIG. 6 is an explanatory diagram for explaining the effect of the present invention on the side flap portion of the absorbent article shown in FIG. FIG. 7 is a view corresponding to FIG. 3 showing another embodiment of the absorbent article of the present invention. 8(a) is a cross-sectional view along the width direction of the exterior sheet and the waist gather forming elastic member shown in FIG. 7, and FIG. 8(b) is a cross-sectional view along the longitudinal direction of the exterior sheet and the leg gather forming elastic member shown in FIG. FIGS. 9(a) and 9(b) are explanatory diagrams for explaining the effect of the non-bonded portion between the exterior sheet and the absorbent body.

Hereinafter, the absorbent article of the present invention will be described based on its preferred embodiments. 1 to 3 show an unfolded disposable diaper (hereinafter also simply referred to as "diaper") which is a first embodiment of the absorbent article of the present invention. FIG. 1 shows the structure of the diaper 1a viewed from the side facing the skin. The diaper 1a shown in FIG. 1 has a longitudinal direction X corresponding to the front-rear direction of the wearer in its unfolded and stretched state, and extending from the wearer's abdomen to the dorsal side via the crotch, and a width direction Y perpendicular to the longitudinal direction X. The diaper 1a has an abdominal region F and a dorsal region R arranged on the wearer's ventral side and a crotch region M located between the ventral region F and the dorsal region R when the diaper 1a is worn. Each area is an area obtained by dividing the entire length of the diaper 1a in the longitudinal direction X into three equal parts, and extends continuously in the front-rear direction of the wearer. The crotch region M has an excretion part facing part (not shown) that is arranged to face the wearer's excretion part when the diaper 1a is worn.

As shown in FIGS. 1 and 2, the diaper 1a includes a liquid-permeable surface sheet 2 that forms the skin-facing surface, and a liquid-impermeable (including water-repellent) leak-proof sheet 3 that forms the non-skin-facing surface. An absorbent body 4 is arranged between the surface sheet 2 and the leak-proof sheet 3, and these members constitute an absorbent main body 10. - 特許庁The top sheet 2 and the leak-proof sheet 3 each have a dimension larger than that of the absorbent body 4 and extend outward from the outer peripheral edge of the absorbent body 4 . The top sheet 2 and the leak-proof sheet 3 extend outward in the width direction Y from both side edges along the longitudinal direction X of the absorbent body 4, as shown in FIG. Both longitudinal edges of the topsheet 2 and the leak-proof sheet 3 in this embodiment substantially match the longitudinal edges of the diaper 1a.

As shown in FIGS. 1 and 2, the diaper 1a includes a liquid-retaining absorbent body 4. As shown in FIGS. The absorber 4 shown in the figure has a substantially rectangular shape, and is arranged so that its longitudinal direction coincides with the longitudinal direction X of the diaper. The absorber 4 is arranged from the ventral area F to the dorsal area R. As shown in FIG. As shown in FIG. 2, the absorbent body 4 is formed by covering an absorbent core 41 having absorbent performance with a liquid-permeable core wrap sheet 42 . The absorber 4 in the present embodiment has a constricted portion in the width direction Y in the crotch region M. As shown in FIG. Both longitudinal edges of the absorber 4 are located inward of the longitudinal edges of the diaper 1a.

In this specification, the "unfolded and stretched state" of the diaper 1a refers to a state in which the diaper 1a is in the unfolded state, and the elastic members of each part of the diaper 1a in the unfolded state are stretched to reach design dimensions (the same dimensions as when the diaper 1a is flattened while completely eliminating the influence of the elastic members). In addition, when focusing on the diaper or its constituent members (for example, an absorbent body), 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 away from the wearer's skin when the diaper is worn. 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. "During wearing" and "wearing state" refer to a state in which the diaper is worn while maintaining a proper position.

FIG. 3 shows the configuration of the diaper 1a viewed from the non-skin facing side. The figure does not show the leak-preventing cuff 6 and the elastic member 62 of the leak-preventing cuff 6, which will be described later.

As shown in FIGS. 2 and 3, the exterior sheet 5 is arranged on the non-skin facing side of the absorbent body 10 . The outer sheet 5 is a member that forms the outer surface of the diaper 1a that is visible from the outside when the diaper 1a is worn. The exterior sheet 5 shown in the figure is arranged in the longitudinal direction X from the ventral area F to the dorsal area R on the non-skin facing surface of the absorbent body 10 . In addition, the exterior sheet 5 forms the outer shape of the diaper 1a in the unfolded and stretched state, and the peripheral edge of the exterior sheet 5 forms the outlines of the abdominal area F, the crotch area M, and the dorsal area R, respectively.

As shown in FIGS. 2 and 3, the outer sheet 5 has a ridged groove shape 5A in which a plurality of ridges 51 protruding toward the non-skin facing surface and extending in one direction and grooves 52 located between the ridges 51 are alternately formed. The outer sheet 5 is adhered to the leak-proof sheet 3 via a joint portion 53 made of an adhesive at the portion where the groove portion 52 is formed. A ridge portion 51 shown in the figure is formed so as to protrude away from the leak-proof sheet 3, and the inside of the ridge portion 51 is hollow. On the other hand, the leak-proof sheet 3 is substantially flat. Although the exterior sheet 5 in this embodiment has a laminated structure in which a plurality of sheets are laminated as described later, a single layer structure is shown in FIG. 2 for convenience of explanation. The outer sheet 5 may be a laminate of a plurality of sheets, or alternatively may be a single layer. When the outer sheet 5 has a single-layer structure, the area defined by the outer sheet 5 and the leak-proof sheet 3 in the ridge 51 is hollow.

In the embodiment shown in FIGS. 1 to 3, the ridges 51 and grooves 52 formed in the outer sheet 5 are formed in a plurality of straight lines extending in the longitudinal direction X, and are alternately arranged in the width direction Y. That is, the ridges 51 and the grooves 52 are formed parallel to each other. The ridge-groove shape 5A having the ridges 51 and the grooves 52 is formed from the abdomen region F to the back region R so as to include a region that overlaps the absorber 4 in the thickness direction Z in the crotch region M, and is formed to reach both longitudinal direction edges of the diaper 1a. That is, the ridge groove shape 5A is formed not only in the region overlapping the absorber 4 in the thickness direction Z, but also outside in the width direction Y on both side edges along the longitudinal direction X of the absorber 4 . The ridge groove shape 5A is formed continuously from the region overlapping the absorber 4 in the thickness direction Z to the outside of the outer peripheral edge of the absorber 4 . In the following description, the ridges 51 extending in the longitudinal direction X of the diaper 1a are also referred to as "longitudinal ridges 51", the grooves 52 extending in the longitudinal direction X of the diaper 1a are also referred to as "longitudinal grooves 52", and the ridges 5A formed to extend in the longitudinal direction X of the diaper 1a are also referred to as "longitudinal ridges 5A".

As shown in FIGS. 1 and 2, a pair of leak-preventing cuffs 6, 6 may be provided on both sides along the longitudinal direction X of the skin facing surface of the diaper 1a. The leak-proof cuff 6 is composed of a water-repellent and air-permeable leak-proof cuff-forming sheet 61 . In the vicinity of the free end of each leak-proof cuff 6, one or more thread-like leak-proof cuff-forming elastic members 62 are arranged in a stretched state in the longitudinal direction X. As shown in FIG. The leak-proof cuff 6 stands up at least in the crotch area M by contracting the elastic member 62 arranged in a stretched state when the diaper 1a is put on, thereby preventing excrement such as urine from flowing outward in the width direction Y.例文帳に追加

As shown in FIGS. 1 and 3, in the diaper 1a of this embodiment, a pair of fastening tapes 7, 7 are provided on both side edges along the longitudinal direction X of the waist flap portion WF of the back region R, which will be described later. Each fastening tape 7 is arranged so as to extend from both side edges along the longitudinal direction X of the waist flap portion WF. One end of each fastening tape 7 on the inner side in the width direction Y is fixed between the exterior sheet 5 and the leak-proof cuff forming sheet 61 (not shown).

The non-skin facing surface of the abdominal region F of the diaper 1a is provided with a fastening region 7A to which the fastening portion 71 of the fastening tape 7 can be detachably fastened. An appropriate material for the fastening region 7A is selected according to the material of the fastening portion 71 of the fastening tape 7 . For example, when the fastening portion 71 is a male member of a mechanical fastener, the fastening region 7A can be made of a fiber sheet that can be engaged with the male member, such as a knitted fabric or a non-woven fabric, as the female member of the mechanical fastener. Moreover, when the fastening portion 71 is made of an adhesive, a smooth synthetic resin film, for example, can be used as the fastening region 7A. In this embodiment, the outer sheet 5 forming the non-skin-facing surface of the abdomen region F of the diaper 1a serves as the fastening region 7A.

As shown in FIGS. 1 to 3, the exterior sheet 5 extends outward in the width direction Y from both side edges along the longitudinal direction X of the absorbent body 4, and forms a side flap portion SF together with the anti-leak cuff forming sheet 61 constituting the anti-leak cuff 6. The side flap portions SF are portions made of members extending outward in the width direction Y from both side edges along the longitudinal direction X of the absorber 4 . In this embodiment, the side flap portions SF are composed of the leakage prevention cuff forming sheets 61 extending outward in the width direction Y from the both side edges of the absorbent body 4, the leakage prevention sheet 3, and the exterior sheet 5. As shown in FIG. These sheets extend outward in the width direction Y from both side edges of the absorbent body 4 from the ventral area F to the dorsal area R. As shown in FIG. These sheets are bonded to each other at the extending portions from the side edges of the absorbent body 4 by known bonding means such as adhesive, heat sealing, and ultrasonic sealing.

In the diaper 1a of the present embodiment, as shown in FIG. 1, leg gather forming elastic members 65 are arranged in a stretched state so as to extend in the longitudinal direction X through the crotch region M on both side portions along the longitudinal direction X of the diaper 1a, specifically on each of the pair of side flap portions SF, SF. Hereinafter, the leg gather forming elastic member 65 is also referred to as a leg elastic member. Due to the contraction of the leg elastic members 65, leg gathers are formed on the left and right portions around the legs of the wearer, that is, on both sides in the longitudinal direction X of the diaper 1a. In this embodiment, the leg elastic members 65 are fixed in a stretched state along the longitudinal direction X between the anti-leak cuff forming sheet 61 and the anti-leak sheet 3 in the side flap portion SF.

The diaper 1a of this embodiment has a waist flap portion WF extending outward in the longitudinal direction X from the edge of the absorbent body 4 in the longitudinal direction X in the back region R. As shown in FIG. The waist flap portion WF is a portion made of a member that extends outward in the longitudinal direction X from the edge of the absorber 4 in the longitudinal direction X. As shown in FIG. In this embodiment, the waist flap portion WF is composed of a leak-preventive cuff forming sheet 61 extending outward in the longitudinal direction X from the edge of the absorber 4 , a top sheet 2 , a leak-preventive sheet 3 , and an exterior sheet 5 . These sheets are bonded to each other at the extending portions from the edge of the absorbent body 4 by known bonding means such as adhesive, heat sealing, ultrasonic sealing, and the like. The waist flap portion WF corresponds to the circumference of the wearer's waist when the diaper 1a is worn. Both side portions in the width direction Y of the waist flap portion WF are also front and rear end portions in the longitudinal direction X of the side flap portion SF.

In the diaper 1a of the present embodiment, waist gather forming elastic members 67 are arranged in a stretched state so as to extend in the width direction Y in the waist flap portion WF in the back region R, as shown in FIG. Hereinafter, the waist gather forming elastic member 67 is also referred to as a waist elastic member. Due to the contraction of the waist elastic member 67, waist gathers are formed at the waist portion on the back side of the wearer. In this embodiment, the waist elastic member 67 is fixed in a stretched state along the width direction Y between the top sheet 2 and the leak-proof sheet 3 in the waist flap portion WF. The diaper 1a may have the waist elastic member 67 in the waist flap portion WF in the abdominal region F.

In the diaper 1a, as shown in FIG. 3, the region of the exterior sheet 5 in which the ridges and grooves 5A are formed and the waist elastic member 67 overlap in the thickness direction of the diaper 1a. Accordingly, in the waist flap portion WF in the dorsal region R, as shown in FIG. 4A, the stretching direction of the waist elastic member 67 intersects with the extending directions of the ridges 51 and the grooves 52 in the ridge groove shape 5A. In the form shown in FIG. 4(a), the waist elastic member 67 expands and contracts in the width direction Y of the diaper 1a, and the ridges 51 and grooves 52 of the ridge groove shape 5A each extend in the longitudinal direction X of the diaper 1a. That is, the waist elastic member 67 and the ridges 51 and grooves 52 are orthogonal to each other.

When the diaper 1a is worn, as shown in FIG. 5, the contraction of the waist elastic member 67 causes the waist flap portion WF to form large unevenness in the waist gathers. The exterior sheet 5 arranged on the non-skin facing side of the waist flap portion WF has the ridge groove shape 5A extending in the direction intersecting with the stretching direction of the waist elastic member 67 as described above. Such an exterior sheet 5 satisfactorily follows the non-skin facing surface of the waist flap part WF, and the adjacent ridges 51 interfere with each other, so that the uneven shape of the waist gathers is suppressed from being irregularly formed and distorted, and the uneven shape is made uniform. Such an effect is hereinafter also referred to as a uniform effect of uneven shape. This improves the ability of the waist flap portion WF to follow the wearer's body, and provides an excellent fit.

In the diaper 1a, as shown in FIG. 3, the regions of the outer sheet 5 in which the grooves 5A are formed overlap with the leg elastic members 65 in the thickness direction of the diaper 1a. Accordingly, in the side flap portion SF, as shown in FIG. 4B, the stretching direction of the leg elastic member 65 and the extending direction of each of the ridge portions 51 and groove portions 52 in the ridge groove shape 5A are parallel. In the form shown in FIG. 4(b), the leg elastic member 65 expands and contracts in the longitudinal direction X of the diaper 1a, and each of the ridges 51 and the grooves 52 in the ridge groove shape 5A extends in the longitudinal direction X of the diaper 1a. That is, the leg elastic members 65, the ridges 51, and the grooves 52 extend in the same direction.

When the diaper 1a is worn, the contraction of the leg elastic members 65 causes the side flap portions SF to form large uneven leg gathers. The exterior sheet 5 arranged on the non-skin facing side of the side flap portion SF has the ridge groove shape 5A extending in the same direction as the elastic direction of the leg elastic member 65 as described above. In the side flap portion SF, as shown in FIG. 6, the direction in which the concave portions and the convex portions of the leg gathers are alternately arranged intersects with the extending direction of the ridge portions 51 and the groove portions 52 . The exterior sheet 5 having the ridged groove shape 5A well follows the non-skin facing surface of the side flap portion SF, and the leg gathers intersect the extending direction of the ridged groove shape 5A, so that the side flap portion SF has fine protrusions dispersed in the planar direction. Such an effect is hereinafter also referred to as a projection dispersion effect. As a result, the leg elastic member 65 shrinks to maintain a good fit, and fine unevenness (wrinkles) formed on the non-skin-facing surface of the side flap portion SF provides an excellent texture.

In addition, the diaper 1a has the outer sheet 5 having the longitudinal ridges 5A formed of the ridges 51 and the grooves 52 extending in the longitudinal direction in the crotch region M. Therefore, compared to an absorbent article having no ridges, water vapor generated from excrement such as urine absorbed and retained in the absorbent body 4 can be easily transferred from the crotch region M to the abdominal region F and the back region R. As a result, discomfort caused by the water vapor and false recognition of leakage can be suppressed.

Specifically, excretions such as urine are absorbed in the crotch region M at the excretory part facing portion and its vicinity, so water vapor generated from the excretion is likely to be generated in the crotch region M. In addition, a large amount of water vapor tends to be released from the crotch region M to the outside of the diaper 1a. In the diaper 1a of this embodiment, the ridges 51 and the grooves 52 extending in the longitudinal direction X function as flow paths for water vapor, so that the water vapor generated from the excreted fluid can move from the crotch region toward the abdominal region and the back region. That is, the water vapor is easily diffused in the front-rear direction of the wearer, thereby facilitating release of the water vapor in the diaper 1a. As a result, dampness during wearing is reduced, and condensation of water vapor generated from excreted liquid is suppressed. In addition, it is possible to reduce the dampness of the clothes caused by moisture generated by condensation, the accompanying urinary leakage of the wearer, anxiety about urinary leakage, and misidentification of leakage around the legs and waist. Due to the effects described above, the diaper 1a can improve comfort when worn.

FIG. 7 shows a second embodiment of the absorbent article of the invention. The second embodiment will be described mainly with regard to the components different from those of the first embodiment shown in FIGS. 1 to 6, and the same components will be denoted by the same reference numerals and descriptions thereof will be omitted. The description of the first embodiment is appropriately applied to components that are not particularly described.

In the diaper 1b of the second embodiment, the outer sheet 5 has a ridge-groove shape 5B in which width-direction ridges 56 and width-direction grooves 57 extending in the width direction Y are alternately formed. "Width direction ridges" are ridges extending in the width direction Y of the diaper 1b, and "width direction grooves" are grooves extending in the width direction Y of the diaper 1b. The ridge groove shape 5B formed so as to extend in the width direction Y of the diaper 1b is also referred to as the "width direction ridge groove shape 5B". The ridge groove shape 5B in the second embodiment extends in the width direction Y as shown in FIG. Specifically, a plurality of ridges 56 and grooves 57 (not shown in FIG. 7) are linearly formed so as to extend in the width direction Y, and are arranged alternately in the longitudinal direction X. As shown in FIG. That is, the ridges 56 and the grooves 57 are formed parallel to each other. The ridge-groove shape 5B having the ridges 56 and the grooves 57 overlaps the absorber 4 in the crotch region M in the thickness direction Z, is formed between the outermost leg elastic members 65 in the width direction Y, and is formed from the ventral region F to the dorsal region R via the crotch region M in the longitudinal direction X. That is, the ridge groove shape 5B is formed not only in the region overlapping the absorber 4 in the thickness direction Z, but also on both edges of the absorber 4 in the longitudinal direction X outward in the same direction X. As shown in FIG. The ridge groove shape 5B is formed continuously from the region overlapping the absorber 4 in the thickness direction Z to the outside of the outer peripheral edge of the absorber 4 .

In the diaper 1b, as shown in FIG. 7, the regions of the outer sheet 5 in which the ridges and grooves 5B are formed overlap with the waist elastic members 67 in the thickness direction of the diaper 1b. Accordingly, in the waist flap portion WF, as shown in FIG. 8A, the stretching direction of the waist elastic member 67 is parallel to the extending directions of the ridge portions 56 and the groove portions 57 in the ridge groove shape 5B. In the form shown in FIG. 8( a ), the waist elastic member 67 expands and contracts in the width direction Y of the diaper 1b, and each of the ridges 56 and the grooves 57 in the ridge groove shape 5B extends in the width direction Y of the diaper 1b. That is, the waist elastic member 67, the ridges 56 and the grooves 57 extend in the same direction. As a result, in the waist flap portion WF, the above-described convex portion dispersion effect is exhibited. As a result, the waist elastic member 67 shrinks to maintain a good fit, and fine unevenness (wrinkles) formed on the non-skin facing surface of the waist flap portion WF provides an excellent texture.

In the diaper 1b, as shown in FIG. 7, the regions of the outer sheet 5 in which the grooves 5B are formed overlap with the leg elastic members 65 in the thickness direction of the diaper 1b. Accordingly, in the side flap portion SF, as shown in FIG. 8B, the expansion/contraction direction of the leg elastic member 65 intersects with the extending directions of the ridge portions 56 and the groove portions 57 in the ridge groove shape 5B. In the form shown in FIG. 8(b), the leg elastic member 65 expands and contracts in the longitudinal direction X of the diaper 1a, and the ridges 56 and grooves 57 of the ridge groove shape 5B extend in the width direction Y of the diaper 1b. That is, the leg elastic members 65, the ridges 56, and the grooves 57 are orthogonal to each other. As a result, the uniformity effect of the uneven shape described above is exhibited for the leg gathers formed in the side flap portions SF. As a result, the ability to follow the wearer's body in the side flap portions SF is improved, and excellent fit is achieved.

The diaper 1b in the second embodiment can easily release water vapor generated in the diaper 1b . Since the exterior sheet 5 of the second embodiment has the ridge groove shape 5B extending in the width direction Y, the water vapor easily diffuses outward in the width direction Y from the absorber 4 . As a result, the diaper 1b according to the second embodiment can suppress discomfort caused by water vapor and misidentification of leakage, and can improve comfort when worn, as in the first embodiment.

From the viewpoint of achieving the uniform effect of the uneven shape or the dispersion effect of the convex portions more reliably, it is preferable that the groove shapes 5A and 5B in the first and second embodiments are formed in the following ranges in the exterior sheet.
From the viewpoint of more reliably achieving the uniform effect of the uneven shape or the dispersion effect of the convex portion of the leg gather, the longitudinal ridge shape 5A or the width direction ridge shape 5B is preferably formed over the entire area in the longitudinal direction X at least in the side flap portion SF.

From the viewpoint of more reliably achieving the uniform effect of the uneven shape or the dispersion effect of the convex portion of the waist gather, the longitudinal ridge shape 5A or the width direction ridge shape 5B is preferably formed over the entire width direction Y at least in the waist flap portion WF.

From the viewpoint of ensuring the diffusion effect of water vapor in the diaper, the longitudinal groove shape 5A or the width direction groove shape 5B is preferably formed from the ventral region F to the dorsal region R so as to include a region overlapping the absorber 4 in the thickness direction Z in the crotch region M, and more preferably formed to reach both longitudinal ends of the diaper 1a. Further, it is more preferable that the longitudinal ridges 5A or the widthwise ridges 5B include regions overlapping in the thickness direction Z with the absorber 4 located in the ventral region F and the dorsal region R, respectively.

In the above-described first and second embodiments, the exterior sheet 5 is partially joined to the non-skin facing surface of the absorbent body 10, so that it is arranged on the non-skin facing surface side. That is, the diapers 1a and 1b have a joint portion where the outer sheet 5 and the absorbent body 10 are joined and a non-joint portion where they are not joined. 9(a) and 9(b) show cross sections of the exterior sheet 5 and the absorbent main body 10 at the non-bonded portion 54. FIG. The exterior sheet 5 shown in FIGS. 9(a) and 9(b) has longitudinal grooves 5A. Since the exterior sheet 5 can be separated from the absorbent main body 10 at the non-bonded portion 54 , a space C is formed between the exterior sheet 5 and the absorbent main body 10 . Since the space C serves as an air passage for water vapor generated in the diaper, the above-described water vapor diffusion effect can be further improved. From the viewpoint of further improving the diffusion effect, it is preferable that the outer sheet 5 and the absorbent main body 10 are coated in stripes, and the joint portion is formed by an adhesive extending in the longitudinal direction X or the width direction Y. From the viewpoint of diffusing water vapor from the dorsal region R, at least the dorsal region R preferably has the joint portion and the non-joint portion.

The ridge groove shapes 5A and 5B can stably maintain the space C in the non-bonded portion 54. As shown in FIG. Specifically, when the space C is crushed in the thickness direction Z, adjacent ridges 51 of the ridge groove shape 5A in FIG. 9A interfere with each other [see FIG. As described above, the space C is hard to be crushed at the non-bonded portion 54, so that the water vapor ventilation path can be stably maintained.

From the viewpoint of improving the conformability to the non-skin-facing surface of the absorbent body 10 and further improving the uniform effect of the uneven shape or the dispersion effect of the convex portions, each ridge and groove in the longitudinal ridge groove shape 5A and the width direction ridge groove shape 5B preferably has the following configuration.
The height H of the ridges 51 and 56 [see FIGS. 4(a) and 8(b)] is preferably 10% or more, more preferably 20% or more, and preferably 200% or less, more preferably 100% or less, of the height HG of the gather projections in the waist gathers or leg gathers. The height HG of the gathers protrusions means the height of the protrusions formed by contraction of the leg gathers forming elastic member 65 or the waist gathers forming elastic member 67 on the non-skin facing side of the diaper. The protrusions and recesses formed on the non-skin facing side of the diaper by the contraction of these elastic members 65 and 67 are also referred to as gather protrusions G1 and gather recesses G2 (see FIG. 5). The height HG of the gathered projection G1 is the distance between the top of the projection and the bottom of the recess on the non-skin facing side, and is a distance including the height of the ridges 51 and 56 formed on the exterior sheet 5. The height HG of the gathers convex G1 is obtained by the following method. First, 10 gather convex portions G1 are arbitrarily selected under a state in which the elastic member forming the leg gathers or waist gathers is stretched to 90% of its maximum stretch. The heights of these selected gathered protrusions G1 are measured, and the average value thereof is taken as the height of the gathered protrusions G1.

The height H of the ridges 51 and 56 (see FIGS. 4(a) and 8(b)) is preferably 0.2 mm or more, more preferably 0.4 mm or more, and preferably 3 mm or less, more preferably 2 mm or less. The height H of the ridges 51 and 56 (see FIGS. 4A and 8B) is the distance between the surface of the exterior sheet 5 forming the grooves 52 and 57 and the top surface of the ridges 51 and 56 . The height H of the ridges 51 and 56 can be appropriately adjusted, for example, by changing the constituent material of the exterior sheet 5 or changing the tension applied to the exterior sheet 5 in a high tension state.

The width W1 (see FIGS. 4A and 8B) of the ridges 51 and 56 along the direction orthogonal to their extending direction is preferably 5% or more, more preferably 10% or more, and preferably 200% or less, and more preferably 100% or less, of the width W of the gather projection.
The grooves 52 and 57 have a width W2 (see FIGS. 4(a) and 8(b)) along the direction orthogonal to their extending direction, which is preferably 5% or more, more preferably 10% or more, and preferably 200% or less, more preferably 100% or less, of the width W of the gather projection.
The width W of the gathers protrusion is the distance between the bottoms of the gathers recesses G2 adjacent in the stretching direction of the leg gathers forming elastic member 65 or the waist gathers forming elastic member 67, and is obtained by the following method. Under the condition that the elastic member forming the leg gathers or the waist gathers is stretched to 90% of its maximum stretch, 10 gather convex portions G1 are arbitrarily selected. The widths of these selected gathered protrusions G1 are measured, and the average value thereof is taken as the width of the gathered protrusions G1.

The width W1 (see FIGS. 4A and 8B) of the ridges 51 and 56 along the direction orthogonal to their extending direction is preferably 0.2 mm or more, more preferably 0.4 mm or more, and preferably 12 mm or less, more preferably 6 mm or less. The grooves 52 and 57 have a width W2 (see FIGS. 4(a) and 8(b)) along the direction perpendicular to their extending direction, preferably 0.2 mm or more, more preferably 0.4 mm or more, and preferably 12 mm or less, more preferably 6 mm or less. The widths W1 and W2 can be appropriately adjusted, for example, by changing the width of the adhesive applied to the exterior sheet 5 or the interval between the adhesive lines.

From the viewpoint of further improving the effect of uniformity of the uneven shape described above, it is preferable that a plurality of ridges 51 and 56 are formed for each gathering convex G1. From the same point of view as above, the number of ridges 51 and 56 formed per gathered convex G1 is preferably 0.5 or more, more preferably 1 or more, and preferably 20 or less, more preferably 10 or less. The number of ridges 51 and 56 formed for one gathers protrusion G1 is the number of ridges 51 and 56 with respect to the width W of the gathers protrusion G1.

The height H, width W1 and overall width W2 described above can be measured, for example, by the following method. That is, a sample in which the ridges 51, 56 and the grooves 52, 57 are formed is cut with a sharp razor along the direction perpendicular to the extending direction of the ridges 51, 56 and the grooves 52, 57, and the cut surface is observed to measure the shortest distance between the surface forming the grooves 52 and the upper surface of the top of the ridges 51, and the obtained value is taken as the height of the ridges. Further, on the cut surface, the full width of each of the ridges 51, 56 and grooves 52, 57 in the direction orthogonal to the extending direction of the ridges 51, 56 and grooves 52, 57 is measured, and the width of each of the ridges 51, 56 and grooves 52, 57 is determined. If it is difficult to measure with the naked eye, the cross section of the cut sample may be observed with a microscope (VHX-1000, manufactured by KEYENCE) at a magnification of 20 to 100 times for measurement.

The plan view shape of the longitudinal ridge groove shape 5A and the width direction ridge groove shape 5B is not particularly limited, and the ridges and grooves in each of the ridge groove shapes 5A and 5B may be formed in a wavy shape or linearly.

In addition, from the viewpoint of further improving the uniform effect of the uneven shape or the dispersion effect of the convex portions, the numbers of the ridges 51 and 56 and the grooves 52 and 57 are each independently preferably 8/10 cm or more, more preferably 16/10 cm or more, preferably 100/10 cm or less, and further preferably 80/10 cm or less. The respective numbers of the ridges 51, 56 and the grooves 52, 57 can be adjusted, for example, by appropriately changing the processing dimensions in shaping the ridges and grooves 5A, 5B. The numbers of the ridges 51 and 56 and the grooves 52 and 57 are the number of ridges that intersect the imaginary straight line drawn in the direction orthogonal to the extending direction of the ridges 51 and 56 and the grooves 52 and 57, and the number of the grooves that intersect the imaginary straight line. If the numbers of the ridges 51, 56 and the grooves 52, 57 differ depending on the position where the imaginary straight line is drawn, the largest number among these numbers is adopted.

Each of the exterior sheets 5 in the first and second embodiments described above is obtained by overlapping two non-stretchable sheets and partially joining them. Specifically, the exterior sheet 5 is a composite sheet in which two non-stretchable sheets 50a and 50b are applied in stripes and bonded together via an adhesive [see FIGS. 4(a) and 8(b)]. In such a composite sheet, two non-stretchable sheets 50a and 50b are joined at grooves 52 and 57 via an adhesive. In addition, in the ridges 51 and 56 of the composite sheet, one of the two non-stretchable sheets 50a protrudes away from the other non-stretchable sheet in an adhesive non-arranged portion (not shown) where no adhesive is applied, thereby forming the ridges 51 and 56. Therefore, the exterior sheet 5 in the first and second embodiments is provided with an uneven shape (ridges and grooves) without using an elastic member.

When the diapers 1a and 1b have a joint portion where the outer sheet 5 and the absorbent body 10 are joined and a non-joined portion 54 where the outer sheet 5 and the absorbent main body 10 are joined, the non-joined portion 54 preferably overlaps the adhesive non-arranged portions of the two non-stretchable sheets 50a and 50b of the composite sheet in the thickness direction of the diapers 1a and 1b from the viewpoint of further improving the vapor diffusion effect.

The exterior sheet 5 described above can be formed, for example, by the following method. First, on one surface of the long strip-shaped non-stretchable sheet 50b, a plurality of strips of adhesive are applied so as to extend in the conveying direction of the sheet 50b. As a result, in the non-stretchable sheet 50b, the adhesive-arranged portion where the adhesive is arranged and the adhesive-unarranged portion where the adhesive is not arranged are alternately formed in a direction intersecting the conveying direction of the sheet 50b (hereinafter also referred to as the cross direction), preferably in a direction orthogonal to the conveying direction. The non-stretchable sheet 50b on which the adhesive is applied in this way is hereinafter also referred to as the adhesive-arranged sheet 50b.

Next, tension is applied to another non-stretchable sheet 50a in the conveying direction to bring the sheet 50a into a high tension state. The non-stretchable sheet 50a in the high tension state is also referred to as a tension imparting sheet 50a. Then, the tension imparting sheet 50a is attached to the adhesive placement sheet 50b via the adhesive placement portion. The tension applied to the tension applying sheet 50a is set higher than the tension applied to the adhesive placement sheet 50b during conveyance. Since the tension imparting sheet 50a in a high tension state is stretched in the conveying direction compared to the adhesive arrangement sheet 50b to which no tension is imparted, the tension imparting sheet 50a is bonded to the adhesive arrangement sheet 50b in a state where the width thereof is reduced. The two laminated sheets 50a and 50b are transported to a downstream process with the tension imparted to the tension imparting sheet 50a being the same as the tension applied to the adhesive placement sheet 50b during transport.

The tension imparted to the tension imparting sheet 50a after the sheets 50a and 50b are adhered to each other becomes lower than the tension imparted before the sheets are adhered to each other, so the high tension state of the tension imparting sheet 50a is released. As a result, the tension applying sheet 50a spreads in the cross direction. Along with this spreading, the tension applying sheet 50a protrudes in a direction away from the adhesive placement sheet 50b. This protruding portion serves as a ridge 51 extending along the application direction of the adhesive. In addition, since the tension imparting sheet 50a in the adhesive placement portion of the exterior sheet 5 is fixed without separating from the adhesive placement sheet 50b, the adhesive placement portion becomes the groove portion 52 extending along the adhesive application direction. Thus, the exterior sheet 5 having the ridge grooves 5A and 5B extending in one direction is obtained.

When the exterior sheet 5 has a single layer structure, the exterior sheet 5 can be formed by the following method. First, an adhesive is applied to the long band-shaped leak-proof sheet 3 in stripes so as to extend in the conveying direction (longitudinal direction of the leak-proof sheet 3). Next, tension is applied to the non-stretchable sheet in the conveying direction to bring it into a high tension state. That is, the non-stretchable sheet is stretched in the conveying direction. Next, the non-stretchable sheet in the high tension state and the leak-proof sheet 3 are adhered together. After this bonding, the high tension state of the non-stretchable sheet is released, so that the non-stretchable sheet is formed with ridges 5A and 5B protruding in the direction away from the leak-proof sheet 3. As shown in FIG. As a result, the exterior sheet 5 having a single-layer structure is obtained.

When manufacturing a diaper 1a in which the ridges and grooves are arranged to extend in the longitudinal direction, the outer sheet 5 or a laminated sheet including the outer sheet 5 may be cut so that the longitudinal direction of the target diaper 1a coincides with the extending direction of the ridges and the grooves to form the diaper. In the case of manufacturing a diaper 1b in which the ridges and grooves are arranged to extend in the width direction, the outer sheet 5 or a laminated sheet including the outer sheet 5 may be cut so that the width direction of the intended diaper 1b and the extending direction of the ridges and grooves are aligned to form the diaper. The "laminated sheet including the exterior sheet 5" includes a laminated sheet in which the exterior sheet 5 and the leak-proof sheet 3 are bonded together.

The material forming each part of the diaper in the embodiment described above will be described in detail. As the surface sheet 2, the leak-proof sheet 3, and the absorbent body 4, those conventionally used in absorbent articles can be used without particular limitation. As the surface sheet 2, for example, a liquid-permeable nonwoven fabric, a perforated film, or the like can be used. As the leak-proof sheet 3, a liquid impermeable resin film, a laminate of a resin film and a non-woven fabric, or the like can be used. As the absorbent core 41 of the absorber 4, an aggregate of hydrophilic fibers such as wood pulp and hydrophilized synthetic fibers, or an aggregate holding a water-absorbing polymer can be used. As the core wrap sheet 42, the same material as the top sheet 2 can be used. Moreover, a water-repellent nonwoven fabric can be used as the sheet 61 for forming the leak-proof cuff.

Moreover, as the exterior sheet 5, it is preferable to use a non-stretchable sheet having no stretchability. Nonwoven fabrics produced by various methods can be used for the exterior sheet 5, for example, spunbond nonwoven fabrics, air-through nonwoven fabrics, spunlace nonwoven fabrics, heat roll nonwoven fabrics, meltblown nonwoven fabrics, or laminated nonwoven fabrics thereof can be used. The outer sheet 5 is
It may be composed of a single sheet as shown in FIG. 2, or alternatively may be composed of a laminate of a plurality of sheets.
The “non-stretchable” of the non-stretchable sheet refers to a sheet having an elongation recovery rate (%) of 20% or less measured by the following [Method for measuring elongation recovery rate], or a sheet that breaks before being stretched 100%. The non-stretchable sheet preferably has a maximum elongation of 90% or less.
[Method for measuring elongation recovery rate]
A sample piece of an elastic sheet with a length of 50 mm and a width of 25 mm was prepared, and a tensile tester (“Tensilon” RTC-1210A from Orientec Co., Ltd.) was used to fix the sample piece at a chuck interval of K0. K1. The elongation recovery rate at 100% elongation is calculated from the following formula.
Elongation recovery rate at 100% elongation (%) = [(K2-K1) / (K2-K0)] × 100

Although the present invention has been described above based on its preferred embodiments, the present invention is not limited to the above-described embodiments. For example, although the ridge grooves 5A and 5B in each embodiment have been described as linear, they may be modified as long as the effects of the present invention are exhibited, and may be, for example, a wave shape.

Moreover, although the diapers 1a and 1b of the above-described embodiment have both the waist elastic member 67 and the leg elastic member 65, they may have only one of these elastic members.

Further, the following absorbent article is disclosed in relation to the embodiment of the present invention described above.
<1>
An absorbent article comprising an absorbent main body including a liquid-permeable surface sheet, an absorbent body and a leak-proof sheet, having a longitudinal direction corresponding to the front-rear direction of a wearer and a width direction orthogonal to the longitudinal direction, having an abdominal region, a crotch region and a dorsal region along the longitudinal direction, wherein the absorbent body is arranged from the ventral region to the dorsal region,
The absorbent article has a pair of side flap portions extending outward in the width direction from both side edges of the absorbent body from the abdominal region to the dorsal region, and a waist flap portion extending outward in the longitudinal direction from the longitudinal edge of the absorbent body in the dorsal region,
An exterior sheet is arranged on the non-skin facing side of the absorbent main body, and the exterior sheet has a longitudinal ridge groove shape in which longitudinal ridges and longitudinal grooves extending in the longitudinal direction are alternately formed,
An elastic member for forming leg gathers is arranged in each of the pair of side flap portions in a stretched state so as to extend in the longitudinal direction through the crotch region, or an elastic member for forming waist gathers is arranged in a stretched state so as to extend in the width direction on the waist flap portion,
An absorbent article according to claim 1, wherein the ridge-shaped region of the outer sheet and the elastic member for forming leg gathers or the elastic member for forming waist gathers are overlapped in the thickness direction of the absorbent article.

<2>
An absorbent article comprising an absorbent main body including a liquid-permeable surface sheet, an absorbent body and a leak-proof sheet, having a longitudinal direction corresponding to the front-rear direction of a wearer and a width direction orthogonal to the longitudinal direction, having an abdominal region, a crotch region and a dorsal region along the longitudinal direction, wherein the absorbent body is arranged from the ventral region to the dorsal region,
The absorbent article has a pair of side flap portions extending outward in the width direction from both side edges of the absorbent body from the abdominal region to the dorsal region, and a waist flap portion extending outward in the longitudinal direction from the longitudinal edge of the absorbent body in the dorsal region,
An exterior sheet is arranged on the non-skin facing side of the absorbent main body, and the exterior sheet has a width direction ridge groove shape in which width direction ridges and width direction grooves extending in the width direction are alternately formed,
An elastic member for forming leg gathers is arranged in each of the pair of side flap portions in a stretched state so as to extend in the longitudinal direction through the crotch region, or an elastic member for forming waist gathers is arranged in a stretched state so as to extend in the width direction on the waist flap portion,
An absorbent article according to claim 1, wherein the ridge-shaped region of the outer sheet and the elastic member for forming leg gathers or the elastic member for forming waist gathers are overlapped in the thickness direction of the absorbent article.

<3>
When the convex portion formed by the contraction of the elastic member for forming leg gathers or the elastic member for forming waist gathers is defined as the convex portion of gathers,
The absorbent article according to <1> or <2> above, wherein the height of the longitudinal ridges or the widthwise ridges is 10% or more and 200% or less, preferably 20% or more and 100% or less, with respect to the height of the gathered protrusions.
<4>
The absorbent article according to any one of <1> to <3> above, wherein the lengthwise ridges or widthwise ridges have a height of 0.2 mm or more and 3 mm or less, preferably 0.4 mm or more and 2 mm or less.
<5>
When the convex portion formed by the contraction of the elastic member for forming leg gathers or the elastic member for forming waist gathers is defined as the convex portion of gathers,
The absorbent article according to any one of <1> to <4>, wherein the longitudinal ridges or the widthwise ridges have a width along a direction perpendicular to the extending direction of 5% or more and 200% or less, preferably 10% or more and 100% or less, with respect to the width of the gathered convex portion.
<6>
The absorbent article according to any one of <1> to <5>, wherein the longitudinal ridges or the widthwise ridges have a width along a direction perpendicular to the extending direction of 0.2 mm or more and 12 mm or less, preferably 0.4 mm or more and 6 mm or less.
<7>
The absorbent article according to any one of <1> to <6>, wherein the longitudinal grooves or the widthwise grooves have a width along a direction orthogonal to their extending direction of 5% or more and 200% or less, preferably 10% or more and 100% or less, with respect to the width of the gather protrusions in the waist gathers or the leg gathers.
<8>
The absorbent article according to any one of <1> to <7>, wherein the width along the direction orthogonal to the extending direction of the longitudinal groove or the width direction groove is 0.2 mm or more and 12 mm or less, preferably 0.4 mm or more and 6 mm or less.
<9>
The absorbent article according to any one of <1> to <8>, wherein each number of the longitudinal ridges, the longitudinal grooves, the widthwise ridges, and the widthwise grooves is independently 8/10 cm or more and 100/10 cm or less, preferably 16/10 cm or more and 80/10 cm or less.
<10>
The absorbent article according to any one of <1> to <9>, wherein the ridged groove shape is formed over the entire length in at least the side flap portion.

<11>
The absorbent article according to any one of <1> to <10>, wherein the ridged groove shape is formed over the entire width in at least the waist flap portion.
<12>
The exterior sheet consists of a composite sheet in which two non-stretchable sheets are bonded via an adhesive applied in stripes,
The two non-stretchable sheets are joined via the adhesive in the longitudinal groove or the widthwise groove,
In the longitudinal ridges or the widthwise ridges, one of the two non-stretchable sheets is separated from the other non-stretchable sheet in the adhesive non-arrangement portion where the adhesive is not arranged.
<13>
The absorbent article according to any one of <1> to <12>, wherein at least the dorsal region has a joint portion where the outer sheet and the absorbent body are joined and a non-joint portion where the outer sheet and the absorbent body are not joined.
<14>
The absorbent article according to <12>, wherein at least the dorsal region has a joint portion where the outer sheet and the absorbent body are joined and a non-joined portion, and the non-joined portion overlaps the adhesive non-arranged portion in the thickness direction of the absorbent article.

1 Absorbent article (disposable diaper)
10 Absorbent main body 2 Surface sheet 3 Leakage-proof sheet 4 Absorber 5 Exterior sheet 5A Longitudinal ridge 51 Longitudinal ridge 52 Longitudinal ridge 54 Non-bonded portion 5B Width ridge 56 Width ridge 57 Width groove 7 Fastening tape F Abdominal region M Inseam region R Back region SF Side Flap part WF Waist flap part X Longitudinal direction Y Width direction Z Thickness direction

Claims (6)

An absorbent article comprising an absorbent main body including a liquid-permeable surface sheet, an absorbent body and a leak-proof sheet, having a longitudinal direction corresponding to the front-rear direction of a wearer and a width direction orthogonal to the longitudinal direction, having an abdominal region, a crotch region and a dorsal region along the longitudinal direction, wherein the absorbent body is arranged from the ventral region to the dorsal region,
The absorbent article has a pair of side flap portions extending outward in the width direction from both side edges of the absorbent body from the abdominal region to the dorsal region, and a waist flap portion extending outward in the longitudinal direction from the longitudinal edge of the absorbent body in the dorsal region,
An exterior sheet is arranged on the non-skin facing side of the absorbent main body, and the exterior sheet has a longitudinal ridge groove shape in which longitudinal ridges and longitudinal grooves extending in the longitudinal direction are alternately formed,
An elastic member for forming leg gathers is arranged in each of the pair of side flap portions in a stretched state so as to extend in the longitudinal direction through the crotch region, or an elastic member for forming waist gathers is arranged in a stretched state so as to extend in the width direction on the waist flap portion,
The regions of the outer sheet in which the longitudinal ridges are formed and the elastic members for forming leg gathers or the elastic members for forming waist gathers overlap in the thickness direction of the absorbent article,
The exterior sheet consists of a composite sheet in which two non-stretchable sheets are bonded via an adhesive applied in stripes,
In the longitudinal groove, the two non-stretchable sheets are joined via the adhesive,
In the longitudinal ridges, one of the two non-stretchable sheets protrudes away from the other non-stretchable sheet at the adhesive non-arrangement portion where the adhesive is not applied, regardless of contraction of the elastic member for forming leg gathers or the elastic member for forming waist gathers . An absorbent article comprising an absorbent main body including a liquid-permeable surface sheet, an absorbent body and a leak-proof sheet, having a longitudinal direction corresponding to the front-rear direction of a wearer and a width direction orthogonal to the longitudinal direction, having an abdominal region, a crotch region and a dorsal region along the longitudinal direction, wherein the absorbent body is arranged from the ventral region to the dorsal region,
The absorbent article has a pair of side flap portions extending outward in the width direction from both side edges of the absorbent body from the abdominal region to the dorsal region, and a waist flap portion extending outward in the longitudinal direction from the longitudinal edge of the absorbent body in the dorsal region,
An exterior sheet is arranged on the non-skin facing side of the absorbent main body, and the exterior sheet has a width direction ridge groove shape in which width direction ridges and width direction grooves extending in the width direction are alternately formed,
An elastic member for forming leg gathers is arranged in each of the pair of side flap portions in a stretched state so as to extend in the longitudinal direction through the crotch region, or an elastic member for forming waist gathers is arranged in a stretched state so as to extend in the width direction on the waist flap portion,
The region of the outer sheet in which the widthwise groove shape is formed and the elastic member for forming leg gathers or the elastic member for forming waist gathers overlap in the thickness direction of the absorbent article,
The exterior sheet consists of a composite sheet in which two non-stretchable sheets are bonded via an adhesive applied in stripes,
In the width direction groove, the two non-stretchable sheets are joined via the adhesive,
In the width direction ridge, one of the two non-stretchable sheets protrudes away from the other non-stretchable sheet at the adhesive non-arranged portion where the adhesive is not arranged, regardless of contraction of the leg gather forming elastic member or the waist gather forming elastic member . The absorbent article according to claim 1 or 2, wherein the longitudinal groove shape or the width direction groove shape is formed over the entire length in at least the side flap portion. The absorbent article according to any one of claims 1 to 3 , wherein the longitudinal groove shape or the width direction groove shape is formed over the entire width direction at least in the waist flap portion. The absorbent article according to any one of claims 1 to 4, wherein at least the dorsal region has a joint portion where the exterior sheet and the absorbent main body are joined and a non-joint portion where the outer sheet and the absorbent body are not joined. The absorbent article according to any one of claims 1 to 5, wherein at least the dorsal region has a joint portion where the outer sheet and the absorbent body are joined and a non-joined portion, and the non-joined portion overlaps the adhesive non-arranged portion in the thickness direction of the absorbent article.

Images