WO2020241556A1

WO2020241556A1 - Absorbent article

Info

Publication number: WO2020241556A1
Application number: PCT/JP2020/020509
Authority: WO
Inventors: 貴史白川; 美奈富田; 拓也幸田
Original assignee: 花王株式会社
Priority date: 2019-05-30
Filing date: 2020-05-25
Publication date: 2020-12-03
Also published as: CN113873979A; JP7315379B2; TW202103663A; JP2020195427A

Abstract

The absorbent article of the present invention is equipped with an absorbent main body (10) including a top sheet (2), an absorber (4), and a leakproof sheet (3). The absorbent main body (10) has a pair of side flap portions (SF, SF) extending from the absorber (4) and a waist flap portion (WF). An exterior sheet (5) is arranged on the non-skin facing surface side of the absorbent main body (10). The exterior sheet (5) has a ridge-and-furrow shape (5A) in which ridges (51) and furrows (52) alternate, extending in the longitudinal direction (X) or the width direction (Y). In the absorbent article, the region where the ridge-and-furrow shape (5A) is formed in the exterior sheet (5) overlaps with elastic members (65) for forming leg gathers in the side flap portions (SF) or with an elastic member (67) for forming a waist gather in the waist flap portion (WF).

Description

Absorbent article

The present invention relates to an absorbent article.

Absorbent articles such as disposable diapers typically include an absorber containing an absorbent material such as a hydrophilic fiber or a water-absorbing polymer and a surface located closer to the wearer's skin than the absorber. It includes a sheet and a leak-proof sheet arranged on the side farther from the wearer's skin than the absorber. 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 includes an inner surface side sheet on the outer surface of the absorber and an outermost surface sheet on the outer surface of the inner surface side sheet, and wrinkles on the inner surface side sheet form irregularities on the outermost surface sheet. , Absorbent articles are listed.

Further, the applicant has previously provided an elastic outer body fixed to the outside of the absorbent body and formed with folds extending in the longitudinal direction of the article, and the height of the folds is in the width direction of the article. We have proposed a pants-type absorbent article in which the lateral region located on the side of the central region is higher than the central region (Patent Document 2).

Patent Document 3 includes a skin-side sheet provided with a plurality of convex portions formed along the longitudinal direction, a ventral elastic region and a dorsal elastic region that expand and contract in the lateral direction, and the elastic regions are contracted. In the state, a pants-type disposable diaper in which the maximum distance between a plurality of wrinkles formed outward in the longitudinal direction from the absorbent core is larger than a predetermined pitch of the convex portion formed in the central portion in the longitudinal direction. Are listed.

Japanese Unexamined Patent Publication No. 2007-11503 Japanese Unexamined Patent Publication No. 2015-100587 JP-A-2017-153735

The present invention includes an absorbent body including a liquid-permeable surface sheet, an absorber and a leak-proof sheet, and has a longitudinal direction corresponding to the front-rear direction of the wearer and a width direction orthogonal to the longitudinal direction. It relates to an absorbent article comprising a ventral region, an inseam region and a dorsal region along the longitudinal direction, wherein the absorber is arranged from the ventral region to the dorsal region.
The absorbent body has a pair of side flaps extending outward in the width direction from both side edges of the absorber from the ventral region to the dorsal region, and the dorsal region. It is preferable to have a waist flap portion extending in the longitudinal direction from the longitudinal end edge of the absorber.
An exterior sheet is arranged on the non-skin facing surface 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. It is preferable to do so.
An elastic member for forming leg gathers is arranged in each of the pair of side flap portions in an extended state so as to extend in the longitudinal direction through the inseam region, or elastic for forming waist gathers is provided on the waist flap portions. It is preferable that the members are arranged in an extended state so as to extend in the width direction.
It is preferable that the region of the exterior sheet in which the ridge shape is formed and the leg gather forming elastic member or the waist gather forming elastic member overlap in the thickness direction of the absorbent article.

The present invention also includes an absorbent body including a liquid permeable surface sheet, an absorber and a leakproof sheet, and has a longitudinal direction corresponding to the front-back direction of the wearer and a width direction orthogonal to the longitudinal direction. The present invention relates to an absorbent article having a ventral region, an inseam region, and a dorsal region along the longitudinal direction, in which the absorber is arranged from the ventral region to the dorsal region.
The absorbent body has a pair of side flaps extending outward in the width direction from both side edges of the absorber from the ventral region to the dorsal region, and the dorsal region. It is preferable to have a waist flap portion extending in the longitudinal direction from the longitudinal end edge of the absorber.
An exterior sheet is arranged on the non-skin facing surface side of the absorbent 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. It is preferable to do so.
An elastic member for forming leg gathers is arranged in each of the pair of side flap portions in an extended state so as to extend in the longitudinal direction through the inseam region, or elastic for forming waist gathers is provided on the waist flap portions. It is preferable that the members are arranged in an extended state so as to extend in the width direction.
It is preferable that the region of the exterior sheet in which the ridge shape is formed and the leg gather forming elastic member or the waist gather forming elastic member overlap in the thickness direction of the absorbent article.

FIG. 1 is a developed plan view schematically showing a skin-facing surface side (inner surface side) in an expanded and extended state in one embodiment of the absorbent article of the present invention. FIG. 2 is a sectional view taken along line II-II of the absorbent article shown in FIG. FIG. 3 is a view showing the arrangement of the ridge structure, the elastic member for forming waist gathers, and the elastic member for forming leg gathers in the exterior sheet shown in FIG. 1, and is a non-skin facing in the unfolded and stretched state of the absorbent article. It is a developed plan view which shows the surface side (outer surface side) schematically. FIG. 4A is a cross-sectional view taken along the width direction of the exterior sheet and the elastic member for forming the waist gather shown in FIG. 3, and FIG. 4B is the elastic member for forming the exterior sheet and the waist gather shown in FIG. It is sectional drawing along the longitudinal direction of. 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. FIG. 8A is a cross-sectional view taken along the width direction of the exterior sheet and the elastic member for forming the waist gather shown in FIG. 7, and FIG. 8B is the elastic member for forming the exterior sheet and the waist gather shown in FIG. It is sectional drawing along the longitudinal direction of. 9 (a) and 9 (b) are explanatory views illustrating the effect at the non-joint portion between the exterior sheet and the absorbent body.

Detailed description of the invention

In general absorbent articles such as diapers, from the viewpoint of improving the fit to the wearer's skin, the area arranged on the ventral side of the wearer and the area arranged around the wearer's legs Elastic members are arranged in an extended state. 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 irregularities tend to be formed in an irregular shape, and depending on the shape of the irregularities, it may affect the fit to the wearer's skin and the texture on the outer surface of the absorbent article. It was. Each of the above-mentioned patent documents does not disclose a technique capable of controlling the shape of gathers (unevenness) formed by an elastic member.

The present invention relates to an absorbent article that controls the shape of gathers formed on the outer surface of the absorbent article and has excellent fit or texture.

Hereinafter, the absorbent article of the present invention will be described based on its preferred embodiment. 1 to 3 show a deployable disposable diaper (hereinafter, also simply referred to as a "diaper") which is a first embodiment of the absorbent article of the present invention. FIG. 1 shows the configuration of the diaper 1a as viewed from the skin-facing surface side. The diaper 1a shown in the figure corresponds to the wearer's anterior-posterior direction in the deployed and extended state, and the wearer's belly. It has a longitudinal direction X extending from the side to the dorsal side via the crotch portion and a width direction Y orthogonal to the longitudinal direction X. The diaper 1a has an inseam region M located between the ventral region F and the dorsal region R arranged on the ventral side of the wearer and the ventral region F and the dorsal region R when worn. And have. Each region is a region obtained by dividing the total 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 inseam region M has an excretion portion facing portion (not shown) that is arranged to face the excretion portion of the wearer when the diaper 1a is worn.

As shown in FIGS. 1 and 2, the diaper 1a has a liquid-permeable surface sheet 2 that forms a skin-facing surface and a liquid-impermeable (including water-repellent) leak-proof sheet that forms a non-skin-facing surface. It has 3 and. An absorber 4 is arranged between the surface sheet 2 and the leak-proof sheet 3, and these members constitute the absorbent body 10. The surface sheet 2 and the leak-proof sheet 3 each have a size larger than that of the absorber 4, and extend outward from the outer peripheral edge of the absorber 4. As shown in FIG. 1, the surface sheet 2 and the leak-proof sheet 3 extend outward in the width direction Y from both side edges of the absorber 4 along the longitudinal direction X. The longitudinal end edges of the surface sheet 2 and the leak-proof sheet 3 in the present embodiment substantially coincide with the longitudinal end edges of the diaper 1a.

As shown in FIGS. 1 and 2, the diaper 1a includes a liquid-retaining absorber 4. The absorber 4 shown in the figure has a substantially rectangular shape, and is arranged so that the longitudinal direction thereof and the longitudinal direction X of the diaper coincide with each other. The absorber 4 is arranged from the ventral region F to the dorsal region R. As shown in FIG. 2, the absorber 4 is formed by coating an absorbent core 41 having an absorbing performance on a liquid-permeable core wrap sheet 42. The absorber 4 in the present embodiment has a portion confined in the width direction Y in the inseam region M. The longitudinal edge of the absorber 4 is located inward of the longitudinal edge of the diaper 1a.

In the present specification, the "expanded and extended state" of the diaper 1a means that the diaper 1a is in the expanded state, and the elastic member of each part is extended in the expanded state of the diaper 1a to eliminate the influence of the elastic member at all. It refers to the state in which it is expanded to the same size as when it is expanded in a flat state. Further, the "skin facing surface" is a surface facing the wearer's skin when wearing the diaper when focusing on the diaper or its constituent members (for example, an absorber), and the "non-skin facing surface" is the diaper. This is the surface that faces the wearer's skin when 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. "When worn" and "wearing state" refer to a state in which the proper wearing position of the diaper is maintained and worn.

FIG. 3 shows the configuration of the diaper 1a as viewed from the non-skin facing surface side. Although the leak-proof cuff 6 and the elastic member 62 and the like in the leak-proof cuff 6 are not shown in the figure, they are only shown as such for convenience of explanation, and the diaper 1a shown in FIG. 1 is actually shown. It has the same configuration as.

As shown in FIGS. 2 and 3, an exterior sheet 5 is arranged on the non-skin facing surface side of the absorbent main body 10. The exterior sheet 5 is a member that forms the outer surface of the diaper 1a that can be visually recognized from the outside when the diaper 1a is worn. The exterior sheet 5 shown in the figure is arranged on the non-skin facing surface of the absorbent main body 10 in the longitudinal direction X from the ventral region F to the dorsal region R. Further, the exterior sheet 5 forms the outer shape of the unfolded and extended diaper 1a, and the peripheral edge of the exterior sheet 5 forms the contour lines of the ventral region F, the inseam region M, and the dorsal region R, respectively. There is.

As shown in FIGS. 2 and 3, the exterior sheet 5 has a plurality of ridges 51 projecting toward the non-skin facing surface side and extending in one direction, and grooves 52 located between the ridges 51 alternately. It has a formed ridge shape 5A. The exterior sheet 5 is adhered to the leak-proof sheet 3 via a joint portion 53 made of an adhesive at a portion where the groove portion 52 is formed. The ridge portion 51 shown in the figure is formed so as to project 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. The exterior sheet 5 in the present embodiment has a laminated structure in which a plurality of sheets are laminated as described later, but for convenience of explanation, it is shown as a single-layer structure in FIG. The exterior sheet 5 may be a stack of a plurality of sheets, or may be a single layer instead. When the exterior sheet 5 has a single-layer structure, the region defined by the exterior sheet 5 and the leak-proof sheet 3 in the ridge 51 is hollow.

In the embodiment shown in FIGS. 1 to 3, a plurality of ridges 51 and grooves 52 formed in the exterior sheet 5 are formed in a straight line so as to extend in the longitudinal direction X, and alternately in the width direction Y. They are lined up. That is, the ridge portion 51 and the groove portion 52 are formed so as to be parallel to each other. The ridge groove shape 5A having the ridge portion 51 and the groove portion 52 is formed from the ventral region F to the dorsal region R so as to include a region overlapping the absorber 4 in the inseam region M in the thickness direction Z. The diaper 1a is formed so as to reach both ends in the longitudinal direction. That is, the ridge shape 5A is formed not only in the region overlapping the absorber 4 in the thickness direction Z but also on the outer side in the width direction Y of both side edges along the longitudinal direction X of the absorber 4. The ridge shape 5A is continuously formed on the outer periphery of the outer peripheral edge of the absorber 4 from a region overlapping the absorber 4 in the thickness direction Z. In the following description, the ridge portion 51 extending in the longitudinal direction X of the diaper 1a is also referred to as a "longitudinal ridge portion 51", and the groove portion 52 extending in the longitudinal direction X of the diaper 1a is also referred to as a "longitudinal groove portion 52" of the diaper 1a. The ridge groove shape 5A formed so as to extend in the longitudinal direction X is also referred to as “longitudinal ridge groove shape 5A”.
The ridge portion 51 or the groove portion 52 is preferably formed by a method other than consolidation processing such as embossing. The method of forming the ridges 51 and the grooves 52 on the exterior sheet 5 will be described later.

As shown in FIGS. 1 and 2, a pair of leakage-

proof cuffs

6 and 6 may be provided on both sides of the diaper 1a on the skin-facing surface along the longitudinal direction X. The leak-proof cuff 6 is composed of a water-repellent and breathable leak-proof cuff forming sheet 61. One or more thread-like elastic members 62 for forming a leak-proof cuff are arranged in the vicinity of the free end of each leak-proof cuff 6 in an extended state in the longitudinal direction X. The leak-proof cuff 6 stands up at least in the inseam region M when the elastic member 62 arranged in the extended state contracts when the diaper 1a is worn, whereby excrement such as urine flows out of the width direction Y. Stop doing.

As shown in FIGS. 1 and 3, in the diaper 1a of the present embodiment, a pair of

fastening tapes

7 and 7 are provided on both side edges of the waist flap portion WF of the dorsal region R, which will be described later, along the longitudinal direction X. ing. 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 ventral region F of the diaper 1a is provided with a fastening region 7A to which the fastening portion 71 included in the fastening tape 7 can be detachably fastened. As the fastening region 7A, an appropriate material is selected according to the material of the fastening portion 71 included in the fastening tape 7. For example, when the fastening portion 71 is a male material of a mechanical fastener, a fiber sheet that can engage with the male material, for example, a knitted fabric or a non-woven fabric, may be used as the female material of the mechanical fastener as the fastening region 7A. it can. When the fastening portion 71 is an adhesive, for example, a smooth film made of synthetic resin can be used as the fastening region 7A. In the present embodiment, the exterior sheet 5 forming the non-skin facing surface in the ventral region F of the diaper 1a is 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 absorber 4, and forms a leak-proof cuff forming the leak-proof cuff 6. A side flap portion SF is formed together with the sheet 61. The side flap portion SF is a portion made of a member extending outward in the width direction Y from both side edges of the absorber 4 along the longitudinal direction X. In the present embodiment, the side flap portion SF includes a leak-proof cuff forming sheet 61, a leak-proof sheet 3, and an exterior sheet 5 extending outward in the width direction Y from both side edges of the absorber 4. These sheets extend outward from each side edge of the absorber 4 in the width direction Y from the ventral region F to the dorsal region R. These sheets are joined to each other by known joining means such as an adhesive, a heat seal, and an ultrasonic seal at the extending portions of the absorber 4 from both side edges.

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

The diaper 1a of the present embodiment has a waist flap portion WF extending outward from the end edge of the absorber 4 in the longitudinal direction X in the dorsal region R. The waist flap portion WF is a portion made of a member extending outward in the same direction X from the edge of the absorber 4 in the longitudinal direction X. In the present embodiment, the waist flap portion WF is formed from the leak-proof cuff forming sheet 61, the surface sheet 2, the leak-proof sheet 3, and the exterior sheet 5 extending outward in the longitudinal direction X from the edge of the absorber 4. Become. These sheets are joined to each other by known joining means such as an adhesive, a heat seal, and an ultrasonic seal at the extending portion of the absorber 4 from the edge. The waist flap portion WF corresponds to the waist circumference of the wearer when the diaper 1a is worn. Both sides of the waist flap portion WF in the width direction Y are also front and rear ends of the side flap portion SF in the longitudinal direction X.

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

In the diaper 1a, as shown in FIG. 3, the region where the ridge shape 5A is formed in the exterior sheet 5 and the waist elastic member 67 overlap in the thickness direction of the diaper 1a. As a result, in the waist flap portion WF in the dorsal region R, as shown in FIG. 4A, the expansion / contraction direction of the waist elastic member 67 and the extension direction of each of the ridge portion 51 and the groove portion 52 in the ridge groove shape 5A. Are crossing. In the form shown in FIG. 4A, the waist elastic member 67 expands and contracts in the width direction Y of the diaper 1a, and the ridge portion 51 and the groove portion 52 in the ridge groove shape 5A each extend in the longitudinal direction X of the diaper 1a. .. That is, the waist elastic member 67, the ridge portion 51, and the groove portion 52 are orthogonal to each other.

When the diaper 1a is worn, as shown in FIG. 5, the waist elastic member 67 contracts to form waist gathers on the waist flap portion WF as large irregularities. The exterior sheet 5 arranged on the non-skin facing surface side of the waist flap portion WF has a ridge shape 5A extending in a direction intersecting the expansion / contraction 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 portion WF, and the adjacent ridge portions 51 interfere with each other, so that the uneven shape of the waist gather is irregularly formed and becomes distorted. Is suppressed, and the uneven shape is made uniform. Such an effect is also hereinafter referred to as a uniform effect of uneven shape. As a result, the followability of the waist flap portion WF to the wearer's body is improved, and excellent fit is achieved.

In the diaper 1a, as shown in FIG. 3, the region where the ridge shape 5A is formed in the exterior sheet 5 and the leg elastic member 65 overlap each other in the thickness direction of the diaper 1a. As a result, in the side flap portion SF, as shown in FIG. 4B, the expansion / contraction direction of the leg elastic member 65 and the extending direction of each of the ridge portion 51 and the groove portion 52 in the ridge groove shape 5A become parallel. There is. In the form shown in FIG. 4B, the leg elastic member 65 expands and contracts in the longitudinal direction X of the diaper 1a, and the ridge portion 51 and the groove portion 52 in the ridge groove shape 5A each extend in the longitudinal direction X of the diaper 1a. .. That is, the leg elastic member 65, the ridge portion 51, and the groove portion 52 extend in the same direction.

When the diaper 1a is worn, the leg gathers are formed as large irregularities on the side flap portion SF due to the contraction of the leg elastic member 65. The exterior sheet 5 arranged on the non-skin facing surface side of the side flap portion SF has a ridge shape 5A extending in the same direction as the expansion and contraction direction of the leg elastic member 65 as described above. In this side flap portion SF, as shown in FIG. 6, the direction in which the concave portions and the convex portions in the leg gathers are alternately arranged intersects with the extending direction of the ridge portion 51 and the groove portion 52. The exterior sheet 5 having the ridge 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 ridge shape 5A so that the side flap portion SF is flat. Convex portions dispersed in the direction are finely formed. Such an effect is also hereinafter referred to as a convex dispersion effect. As a result, good fit is maintained due to the contraction of the leg elastic member 65, and fine irregularities (wrinkles) formed on the non-skin facing surface of the side flap portion SF provide an excellent texture.

Further, since the diaper 1a includes an exterior sheet 5 having a longitudinal ridge groove shape 5A composed of a ridge portion 51 extending in the longitudinal direction and a groove portion 52 in the inseam region M, the diaper 1a is an absorbent article having no ridge groove shape. In comparison, water vapor generated from excrement liquid such as urine absorbed and retained by the absorber 4 can be easily transferred from the inseam region M to the ventral region F and the dorsal region R. As a result, it is possible to suppress the discomfort caused by the water vapor and the misidentification of leakage.

Specifically, since the excretory liquid such as urine is absorbed in and near the excretory portion facing portion in the inseam region M, water vapor generated from the excretory liquid is likely to be generated in the inseam region M. In addition, a large amount of water vapor tends to be released from the inseam region M to the outside of the diaper 1a. In the diaper 1a of the present embodiment, since the ridges 51 and the grooves 52 extending in the longitudinal direction X function as water vapor flow paths, the water vapor generated from the excrement fluid is moved from the inseam region to the ventral region and the dorsal region. I can let you. That is, the water vapor can be easily diffused in the front-rear direction of the wearer, thereby facilitating the release of the water vapor in the diaper 1a. As a result, stuffiness during wearing is reduced, and dew condensation of water vapor generated from the excrement liquid is suppressed. In addition, it is possible to reduce the dampness of clothes caused by the moisture generated by dew condensation, the accompanying induction of urine leakage by the wearer, anxiety about urine leakage, and misidentification of leakage around the legs and waist. Due to the above effects, the diaper 1a can improve the comfort when worn.

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

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

In the diaper 1b, as shown in FIG. 7, the region where the ridge shape 5B is formed in the exterior sheet 5 and the waist elastic member 67 overlap in the thickness direction of the diaper 1b. As a result, in the waist flap portion WF, as shown in FIG. 8A, the expansion / contraction direction of the waist elastic member 67 and the extension direction of each of the ridge portion 56 and the groove portion 57 in the ridge groove shape 5B become parallel. There is. In the form shown in FIG. 8B, the waist elastic member 67 expands and contracts in the width direction Y of the diaper 1b, and the ridge portion 56 and the groove portion 57 in the ridge groove shape 5B each extend in the width direction Y of the diaper 1b. .. That is, the waist elastic member 67, the ridge portion 56, and the groove portion 57 extend in the same direction. As a result, the above-mentioned convex portion dispersion effect is exhibited in the waist flap portion WF. As a result, good fit is maintained due to the contraction of the waist elastic member 67, and fine irregularities (wrinkles) formed on the non-skin facing surface of the waist flap portion WF provide an excellent texture.

In the diaper 1b, as shown in FIG. 7, the region where the ridge shape 5B is formed in the exterior sheet 5 and the leg elastic member 65 overlap in the thickness direction of the diaper 1b. As a result, in the side flap portion SF, as shown in FIG. 8B, the expansion / contraction direction of the leg elastic member 65 and the extension direction of the ridge portion 56 and the groove portion 57 in the ridge groove shape 5B intersect with each other. .. In the form shown in FIG. 8B, the leg elastic member 65 expands and contracts in the longitudinal direction X of the diaper 1a, and the ridges 56 and the grooves 57 in the ridge groove shape 5B each extend in the width direction Y of the diaper 1b. .. That is, the leg elastic member 65, the ridge portion 56, and the groove portion 57 are orthogonal to each other. As a result, the above-mentioned uniform effect of the uneven shape is obtained for the leg gathers formed on the side flap portion SF. As a result, the followability of the side flap portion SF to the wearer's body is improved, and excellent fit is achieved.

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

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

Regarding the waist gather, from the viewpoint of more reliably achieving the above-mentioned uniform effect of the uneven shape or the effect of dispersing the convex portion, the longitudinal ridge shape 5A or the width ridge shape 5B has a width direction Y at least in the waist flap portion WF. It is preferably formed over the entire area.

From the viewpoint of more reliably diffusing the water vapor in the diaper, the longitudinal ridge shape 5A or the width ridge shape 5B includes a region overlapping the absorber 4 in the inseam region M in the thickness direction Z. It is preferably formed from the ventral region F to the dorsal region R, and more preferably formed so as to reach both ends in the longitudinal direction of the diaper 1a. Further, it is more preferable that the longitudinal ridge shape 5A or the width ridge shape 5B includes a region overlapping the absorber 4 located in each of the ventral region F and the dorsal region R in the thickness direction Z.

In the first and second embodiments described above, the exterior sheet 5 is arranged on the non-skin facing surface side of the absorbent main body 10 by being partially bonded to the non-skin facing surface. That is, the

diapers

1a and 1b have a joint portion in which the exterior sheet 5 and the absorbent main body 10 are joined, and a non-joint portion in which the outer sheet 5 and the absorbent main body 10 are not joined. 9 (a) and 9 (b) show cross sections of the exterior sheet 5 and the absorbent body 10 in the non-joint portion 54. The exterior sheet 5 shown in FIGS. 9 (a) and 9 (b) has a longitudinal ridge shape 5A. In the non-joining portion 54, the exterior sheet 5 is separable from the absorbent body 10, so that a space C is formed between the exterior sheet 5 and the absorbent body 10. Since the space C serves as a ventilation path for the water vapor generated in the diaper, the above-mentioned water vapor diffusion effect can be further improved. From the viewpoint of further improving the diffusion effect, the exterior sheet 5 and the absorbent main body 10 are coated in a striped shape, and the joint portion is formed by an adhesive extending in the longitudinal direction X or the width direction Y. preferable. From the viewpoint of more diffusing water vapor from the dorsal region R, it is preferable that at least the dorsal region R has the joint portion and the non-joint portion.

The ridged groove shapes 5A and 5B can stably maintain the space C at the non-joining portion 54. Specifically, when the space C is crushed in the thickness direction Z, the adjacent ridges 51 of the ridge shape 5A interfere with each other [see FIG. 9A], and the crushed space C returns to the original shape. Recover [see FIG. 9 (b)]. As described above, since the space C is not easily crushed in the non-joint portion 54, the water vapor ventilation path can be stably maintained.

From the viewpoint of improving the followability of the absorbent main body 10 to the non-skin facing surface and further improving the above-mentioned uniform effect of the uneven shape or the effect of dispersing the convex portion, the longitudinal ridge shape 5A and the width direction ridge shape 5B It is preferable that each of the ridges and grooves in the above 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 10% or more, based on the height HG of the gathered protrusions in the waist gather or leg gather. Is 20% or more, preferably 200% or less, and more preferably 100% or less. The height HG of the gathered convex portion means the height of the convex portion formed by the contraction of the leg gather forming elastic member 65 or the waist gather forming elastic member 67 on the non-skin facing surface side of the diaper. The convex portions and concave portions formed on the non-skin facing surface side of the diaper by the contraction of the

elastic members

65 and 67 are also referred to as gather convex portions G1 and gather concave portions G2 (see FIG. 5). The height HG of the gathered convex portion G1 is the distance between the top of the convex portion and the bottom of the concave portion on the non-skin facing surface side, and includes the heights of the

ridges

51 and 56 formed on the exterior sheet 5. The distance. The height HG of the gathered convex portion G1 is obtained by the following method. First, 10 gathered convex portions G1 are arbitrarily selected under a state in which the elastic member forming the leg gather or waist gather is extended to 90% of the maximum extension thereof. With respect to these selected gathered convex portions G1, the heights of the convex portions are measured, and the average value thereof is taken as the height of the gathered convex portions 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, further. It is preferably 2 mm or less. The heights H of the ridges 51 and 56 [see FIGS. 4 (a) and 8 (b)] are the surfaces of the exterior sheet 5 forming the

grooves

52 and 57 and the upper surfaces of the tops of the

ridges

51 and 56. The distance between them. The heights H of the

ridges

51 and 56 can be appropriately adjusted by, for example, changing the constituent materials of the exterior sheet 5 or changing the tension of the exterior sheet 5 applied in a high tension state. ..

The width W1 of the

ridges

51 and 56 along the direction orthogonal to the extending direction [see FIGS. 4 (a) and 8 (b)] is preferably 5% or more with respect to the width W of the gathered protrusions. It is more preferably 10% or more, preferably 200% or less, still more preferably 100% or less.
The width W2 of the

grooves

52 and 57 along the direction orthogonal to the extending direction [see FIGS. 4A and 8B] is preferably 5% or more with respect to the width W of the gathered protrusions. It is more preferably 10% or more, preferably 200% or less, still more preferably 100% or less.
The width W of the gathered convex portion is the distance between the bottom portions of the gathered concave portions G2 adjacent to each other in the expansion / contraction direction of the leg gather forming elastic member 65 or the waist gather forming elastic member 67, and is obtained by the following method. Ten gathered convex portions G1 are arbitrarily selected under the condition that the elastic member forming the leg gather or the waist gather is extended to 90% of the maximum extension thereof. With respect to these selected gathered convex portions G1, the width of the convex portions is measured, and the average value thereof is taken as the width of the gathered convex portion G1.

The

ridges

51 and 56 have a width W1 [see FIGS. 4 (a) and 8 (b)] along a direction orthogonal to the extending direction, preferably 0.2 mm or more, more preferably 0.4 mm or more. Yes, and is preferably 12 mm or less, more preferably 6 mm or less. The

groove portions

52 and 57 have a width W2 [see FIGS. 4 (a) and 8 (b)] along a direction orthogonal to the extending direction thereof, preferably 0.2 mm or more, and more preferably 0.4 mm or more. Further, it is preferably 12 mm or less, more preferably 6 mm or less. The widths W1 and W2 can be appropriately adjusted by, for example, changing the width of the adhesive applied to the exterior sheet 5 and the spacing between the adhesive rows.

From the viewpoint of further improving the uniform effect of the above-mentioned uneven shape, it is preferable that a plurality of

ridges

51 and 56 are formed for each gather convex portion G1. From the same viewpoint as above, the number of

ridges

51 and 56 formed per gathered convex portion G1 is preferably 0.5 or more, more preferably 1 or more, and preferably 20. Below, more preferably 10 or less. The number of

ridges

51 and 56 formed for one gather convex portion G1 is the number of

ridges

51 and 56 with respect to the width W of the gather convex portion G1.

The height H, width W1 and total width W2 described above can be measured by, for example, the following methods. That is, the sample in which the

ridges

51, 56 and the

grooves

52, 57 are formed is cut with a sharp razor along the direction orthogonal to the extending direction of the

ridges

51, 56 and the

grooves

52, 57, and the cutting thereof is performed. By observing the surface, the shortest distance between the surface forming the groove 52 and the upper surface of the top of the ridge 51 is measured, and the obtained value is taken as the height of the ridge. Further, on the cut surface, the total widths of the

ridges

51, 56 and the

grooves

52, 57 in the direction orthogonal to the extending direction of the

ridges

51, 56 and the

grooves

52, 57 are measured, and the total widths of the

ridges

51, 56 and the

grooves

52, 57 are measured. And the width of the

grooves

52 and 57. When it is difficult to measure with the naked eye, the cross section of the cut sample may be observed and measured at a magnification of 20 to 100 times using, for example, a microscope (manufactured by KEYENCE, VHX-1000).

The plan-view shapes of the longitudinal ridge shape 5A and the width ridge shape 5B are not particularly limited, and the ridges and grooves in the respective ridge shapes 5A and 5B may be formed in a corrugated shape and may be linear. It may be formed.

Further, from the viewpoint of further improving the above-mentioned uniform effect of the uneven shape or the effect of dispersing the convex portions, the number of the

ridges

51, 56 and the

grooves

52, 57 may be 8/10 cm or more independently. It is more preferably 16 pieces / 10 cm or more, more preferably 100 pieces / 10 cm or less, and further preferably 80 pieces / 10 cm or less. The number of the

ridges

51, 56 and the

grooves

52, 57 can be adjusted, for example, by appropriately changing the processing dimensions in the shaping of the ridge shapes 5A and 5B. The number of the

ridges

51, 56 and the

grooves

52, 57 is the number of the ridges that intersect the virtual straight lines when a virtual straight line is drawn in the direction orthogonal to the extending direction of the

ridges

51, 56 and the

grooves

52, 57. The number and the number of grooves intersecting the virtual straight line. If the numbers of the

ridges

51 and 56 and the

grooves

52 and 57 differ depending on the position where the virtual straight line is drawn, the largest of these numbers is adopted.

The exterior sheet 5 in the first and second embodiments described above is formed by stacking two non-stretchable sheets and partially joining them. Specifically, the exterior sheet 5 is composed of a composite sheet in which two

non-stretchable sheets

50a and 50b are joined via an adhesive coated in a striped shape [FIGS. 4 (a) and 8 (FIG. 8). b) See]. In such a composite sheet, two

non-stretchable sheets

50a and 50b are joined to each other in the

grooves

52 and 57 via an adhesive. Further, in the

ridges

51 and 56 of the composite sheet, one of the two non-stretchable sheets 50a is separated from the other non-stretchable sheet in the adhesive non-arranged portion (not shown) to which the adhesive is not arranged. It protrudes so as to be separated, whereby

ridges

51 and 56 are formed. 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 in which the exterior sheet 5 and the absorbent main body 10 are bonded and a non-bonded portion 54 in which the exterior sheet 5 and the absorbent main body 10 are bonded, from the viewpoint of further improving the diffusion effect of water vapor, It is preferable that the non-joining portion 54 overlaps with the adhesive non-arranged portion of the two

non-stretchable sheets

50a and 50b of the composite sheet in the thickness direction of the

diapers

1a and 1b.

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

Next, tension is applied to another non-stretchable sheet 50a in the transport direction to bring the sheet 50a into a high-tensile state. The non-stretchable sheet 50a in the high tension state is also referred to as a tension applying sheet 50a. Then, the tension applying sheet 50a is attached to the adhesive arrangement sheet 50b via the adhesive arrangement portion. The tension applied to the tension applying sheet 50a is set higher than the tension at the time of transporting the adhesive arrangement sheet 50b. Since the tension applying sheet 5a in the high tension state is elongated in the transport direction as compared with the adhesive arrangement sheet 5b to which no tension is applied, the adhesive is arranged in a state where the width of the tension applying sheet 5a is reduced. It is bonded to the sheet 5b. The two bonded sheets 5a and 5b are transported to a downstream process so that the tension applied to the tension applying sheet 50a becomes the tension at the time of transporting the adhesive arrangement sheet 50b.

Since the tension applied to the tension applying sheets 50a after the

sheets

50a and 50b are bonded to each other is lower than the tension applied before the sheets are bonded to each other, the high tension state of the tension applying sheet 50a is released. Will be done. As a result, the tension applying sheet 50a expands in the intersecting direction. With this expansion, the tension applying sheet 50a protrudes in the direction away from the adhesive arranging sheet 50b. This protruding portion becomes a ridge portion 51 extending along the application direction of the adhesive. Further, since the tension applying sheet 50a in the adhesive arranging portion of the exterior sheet 5 is fixed without being separated from the adhesive arranging sheet 50b, the adhesive arranging portion has a groove portion 52 extending along the adhesive application direction. Become. In this way, the exterior sheet 5 having the ridged groove shapes 5A and 5B extending in one direction can be obtained.

When the exterior sheet 5 has a single-layer structure, the exterior sheet 5 can be formed by the following method. First, the adhesive is applied to the long strip-shaped leak-proof sheet 3 so as to extend in the transport direction (longitudinal direction of the leak-proof sheet 3) and in a striped shape. Next, tension is applied to the non-stretchable sheet in the transport direction to bring it into a high-tensile state. That is, the non-stretchable sheet is stretched in the transport direction. Next, the non-stretchable sheet in the high tension state and the leak-proof sheet 3 are bonded together. After this bonding, the high-tensile state of the non-stretchable sheet is released, so that the non-stretchable sheet is formed with ridged groove shapes 5A and 5B protruding in a direction away from the leak-proof sheet 3. As a result, the exterior sheet 5 having a single-layer structure can be obtained.

When manufacturing a diaper 1a in which the ridge groove shape is arranged so as to extend in the longitudinal direction, the exterior sheet 5 or the exterior sheet 5 or the diaper so that the longitudinal direction of the target diaper 1a and the extending direction of the ridge and the groove match. The diaper may be formed by cutting the bonding sheet containing this. Further, in the case of manufacturing a diaper 1b in which the ridge groove shape is arranged so as to extend in the width direction, the exterior sheet is provided so that the width direction of the target diaper 1b and the extending direction of the ridge and the groove match. The diaper may be formed by cutting 5 or the bonding sheet containing the same. Examples of the "bonded sheet including the exterior sheet 5" include a bonded sheet in which the exterior sheet 5 and the leak-proof sheet 3 are bonded together.

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

Further, as the exterior sheet 5, it is preferable to use a non-stretchable sheet having no elasticity. As the exterior sheet 5, for example, non-woven fabrics produced by various manufacturing methods can be used, and for example, spunbonded non-woven fabrics, air-through non-woven fabrics, spunlace non-woven fabrics, heat roll non-woven fabrics, melt blown non-woven fabrics, laminated non-woven fabrics thereof and the like can be used. As shown in FIG. 2, the exterior sheet 5 may be composed of one sheet, or may be composed of a laminated body of a plurality of sheets instead.
The "non-stretchable" of the non-stretchable sheet means a sheet having a stretch recovery rate (%) of 20% or less measured by the following [measurement method of stretch recovery rate], or a sheet that breaks before being stretched 100%. .. The non-stretchable sheet preferably has a maximum elongation of 90% or less.
[Measurement method of elongation recovery rate]
Prepare a sample piece of elastic sheet with a length of 50 mm and a width of 25 mm, and fix the sample piece between the chucks (chuck interval K0) using a tensile tester (Orientec Co., Ltd. "Tencilon" RTC-1210A). , The length of the sample piece when the stress becomes 0 when the length is extended to K2 (K2 = K0 × 2) at a speed of 300 mm / min and then returned at the same speed as the tensile speed. Let be the length K1 after elongation and recovery. The elongation recovery rate at 100% elongation is calculated from the following equation.
Growth recovery rate at 100% elongation (%) = [(K2-K1) / (K2-K0)] × 100

Although the present invention has been described above based on the preferred embodiment thereof, the present invention is not limited to the above-described embodiment. For example, the ridge groove shapes 5A and 5B in each embodiment have been described as having a linear shape, but they can be changed as long as the effects of the present invention are exhibited, and may be a shape such as a waveform.

Further, although the

diapers

1a and 1b of the above-described embodiment include both the waist elastic member 67 and the leg elastic member 65, the

diapers

1a and 1b may include only one of these elastic members.

The following absorbent articles are further disclosed with respect to the above-described embodiment of the present invention.
<1>
It is provided with an absorbent body including a liquid-permeable surface sheet, an absorber and a leak-proof sheet, has a longitudinal direction corresponding to the front-back direction of the wearer and a width direction orthogonal to the longitudinal direction, and is along the longitudinal direction. An absorbent article comprising a ventral region, an inseam region and a dorsal region, wherein the absorber is arranged from the ventral region to the dorsal region.
The absorbent article comprises a pair of side flaps extending outward in the width direction from each of the side edges of the absorber from the ventral region to the dorsal region, and in the dorsal region. It has a waist flap portion extending outward in the longitudinal direction from the longitudinal end edge of the absorber.
An exterior sheet is arranged on the non-skin facing surface side of the absorbent body, and the exterior sheet has a longitudinal ridge shape in which longitudinal ridges and longitudinal grooves extending in the longitudinal direction are alternately formed. Have and
A leg gather forming elastic member is arranged in each of the pair of side flap portions in an extended state so as to extend in the longitudinal direction through the inseam region, or the waist flap portion is provided with an elastic member for forming waist gathers. The members are arranged in an extended state so as to extend in the width direction.
An absorbent article in which the region of the exterior sheet in which the ridge shape is formed and the leg gather forming elastic member or the waist gather forming elastic member overlap in the thickness direction of the absorbent article.

<2>
It is provided with an absorbent body including a liquid-permeable surface sheet, an absorber and a leak-proof sheet, has a longitudinal direction corresponding to the front-back direction of the wearer and a width direction orthogonal to the longitudinal direction, and is along the longitudinal direction. An absorbent article comprising a ventral region, an inseam region and a dorsal region, wherein the absorber is arranged from the ventral region to the dorsal region.
The absorbent article comprises a pair of side flaps extending outward in the width direction from each of the side edges of the absorber from the ventral region to the dorsal region, and in the dorsal region. It has a waist flap portion extending outward in the longitudinal direction from the longitudinal end edge of the absorber.
An exterior sheet is arranged on the non-skin facing surface side of the absorbent 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. Have and
A leg gather forming elastic member is arranged in each of the pair of side flap portions in an extended state so as to extend in the longitudinal direction through the inseam region, or the waist flap portion is provided with an elastic member for forming waist gathers. The members are arranged in an extended state so as to extend in the width direction.
An absorbent article in which the region of the exterior sheet in which the ridge shape is formed and the leg gather forming elastic member or the waist gather forming elastic member overlap in the thickness direction of the absorbent article.

<3>
When the convex portion formed by the contraction of the leg gather forming elastic member or the waist gather forming elastic member is referred to as a gather convex portion.
The height of the longitudinal ridge or the width ridge is 10% or more and 200% or less, preferably 20% or more and 100% or less with respect to the height of the gathered convex portion. The absorbent article according to <2>.
<4>
The absorption according to any one of <1> to <3>, wherein the height of the longitudinal ridge or the width ridge is 0.2 mm or more and 3 mm or less, preferably 0.4 mm or more and 2 mm or less. Sex goods.
<5>
When the convex portion formed by the contraction of the leg gather forming elastic member or the waist gather forming elastic member is referred to as a gather convex portion.
The width of the longitudinal ridge or the width ridge along the direction orthogonal to the extending direction is 5% or more and 200% or less, preferably 10% or more and 100% with respect to the width of the gather convex portion. The absorbent article according to any one of <1> to <4> below.
<6>
The width of the longitudinal ridge or the width ridge along the direction orthogonal to the extending direction is 0.2 mm or more and 12 mm or less, preferably 0.4 mm or more and 6 mm or less. The absorbent article according to any one of 5>.
<7>
When the convex portion formed by the contraction of the leg gather forming elastic member or the waist gather forming elastic member is referred to as a gather convex portion.
The width of the longitudinal groove or the width groove along the direction orthogonal to the extending direction is 5% or more and 200% or less, preferably 10% or more and 100% or less with respect to the width of the gather convex portion. The absorbent article according to any one of <1> to <6>.
<8>
The width of the longitudinal groove portion or the width direction groove portion along the direction orthogonal to the extending direction is 0.2 mm or more and 12 mm or less, preferably 0.4 mm or more and 6 mm or less, said <1> to <7>. The absorbent article according to any one of.
<9>
The number of each of the longitudinal ridges, the longitudinal grooves, the width ridges, and the width grooves is independently 8/10 cm or more and 100/10 cm or less, preferably 16/10 cm or more. The absorbent article according to any one of <1> to <8>, which is 80 pieces / 10 cm or less.
<10>
The absorbent article according to any one of <1> to <9>, wherein the ridge shape is formed over the entire area in the longitudinal direction at least in the side flap portion.

<11>
The absorbent article according to any one of <1> to <10>, wherein the ridge shape is formed at least in the waist flap portion over the entire area in the width direction.
<12>
The exterior sheet is composed of a composite sheet in which two non-stretchable sheets are joined via an adhesive coated in a striped shape.
In the longitudinal groove portion or the width direction groove portion, the two non-stretchable sheets are joined via the adhesive.
In the longitudinal ridge or the width ridge, one of the two non-stretchable sheets is separated from the other non-stretchable sheet in the adhesive non-arranged portion to which the adhesive is not arranged. The absorbent article according to any one of <1> to <11>, which is protruding from the above.
<13>
At least one of the above <1> to <12>, the dorsal region has a joint portion in which the exterior sheet and the absorbent body are joined, and a non-joint portion in which the exterior sheet and the absorbent body are not joined. Absorbent article described in.
<14>
At least the dorsal region has a joint portion to which the exterior sheet and the absorbent body are joined, and a non-joint portion which is not joined, and the non-joint portion includes the adhesive non-arranged portion and the absorption portion. The absorbent article according to <12>, which overlaps in the thickness direction of the sex article.

According to the present invention, an absorbent article having excellent fit or texture is provided by controlling the shape of gathers formed on the outer surface of the absorbent article.

Claims

It is provided with an absorbent body including a liquid-permeable surface sheet, an absorber and a leak-proof sheet, has a longitudinal direction corresponding to the front-back direction of the wearer and a width direction orthogonal to the longitudinal direction, and is along the longitudinal direction. An absorbent article comprising a ventral region, an inseam region and a dorsal region, wherein the absorber is arranged from the ventral region to the dorsal region.
The absorbent article comprises a pair of side flaps extending outward in the width direction from each of the side edges of the absorber from the ventral region to the dorsal region, and in the dorsal region. It has a waist flap portion extending outward in the longitudinal direction from the longitudinal end edge of the absorber.
An exterior sheet is arranged on the non-skin facing surface side of the absorbent body, and the exterior sheet has a longitudinal ridge shape in which longitudinal ridges and longitudinal grooves extending in the longitudinal direction are alternately formed. Have and
A leg gather forming elastic member is arranged in each of the pair of side flap portions in an extended state so as to extend in the longitudinal direction through the inseam region, or the waist flap portion is provided with an elastic member for forming waist gathers. The members are arranged in an extended state so as to extend in the width direction.
An absorbent article in which the region of the exterior sheet in which the ridge shape is formed and the leg gather forming elastic member or the waist gather forming elastic member overlap in the thickness direction of the absorbent article.
It is provided with an absorbent body including a liquid-permeable surface sheet, an absorber and a leak-proof sheet, has a longitudinal direction corresponding to the front-back direction of the wearer and a width direction orthogonal to the longitudinal direction, and is along the longitudinal direction. An absorbent article comprising a ventral region, an inseam region and a dorsal region, wherein the absorber is arranged from the ventral region to the dorsal region.
The absorbent article comprises a pair of side flaps extending outward in the width direction from each of the side edges of the absorber from the ventral region to the dorsal region, and in the dorsal region. It has a waist flap portion extending outward in the longitudinal direction from the longitudinal end edge of the absorber.
An exterior sheet is arranged on the non-skin facing surface side of the absorbent 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. Have and
A leg gather forming elastic member is arranged in each of the pair of side flap portions in an extended state so as to extend in the longitudinal direction through the inseam region, or the waist flap portion is provided with an elastic member for forming waist gathers. The members are arranged in an extended state so as to extend in the width direction.
An absorbent article in which the region of the exterior sheet in which the ridge shape is formed and the leg gather forming elastic member or the waist gather forming elastic member overlap in the thickness direction of the absorbent article.
When the convex portion formed by the contraction of the leg gather forming elastic member or the waist gather forming elastic member is referred to as a gather convex portion.
The absorbent article according to claim 1 or 2, wherein the height of the longitudinal ridge or the width ridge is 10% or more and 200% or less with respect to the height of the gathered protrusion.
The absorbent article according to any one of claims 1 to 3, wherein the height of the longitudinal ridge or the width ridge is 0.2 mm or more and 3 mm or less.
When the convex portion formed by the contraction of the leg gather forming elastic member or the waist gather forming elastic member is referred to as a gather convex portion.
Claims 1 to 4 in which the width of the longitudinal ridge or the width ridge along the direction orthogonal to the extending direction is 5% or more and 200% or less with respect to the width of the gather convex portion. The absorbent article according to any one of the above.
The absorbency according to any one of claims 1 to 5, wherein the longitudinal ridge or the width ridge has a width of 0.2 mm or more and 12 mm or less along a direction orthogonal to the extending direction thereof. Goods.
When the convex portion formed by the contraction of the leg gather forming elastic member or the waist gather forming elastic member is referred to as a gather convex portion.
Any of claims 1 to 6, wherein the width of the longitudinal groove or the width groove along the direction orthogonal to the extending direction is 5% or more and 200% or less with respect to the width of the gather convex portion. Or the absorbent article according to item 1.
The absorbent article according to any one of claims 1 to 7, wherein the longitudinal groove portion or the width direction groove portion has a width of 0.2 mm or more and 12 mm or less along a direction orthogonal to the extending direction thereof.
Claims 1 to 8 wherein the number of each of the longitudinal ridge portion, the longitudinal groove portion, the width direction ridge portion, and the width direction groove portion is independently 8/10 cm or more and 100/10 cm or less. The absorbent article according to any one of the above.
The absorbent article according to any one of claims 1 to 9, wherein the ridge shape is formed over the entire area in the longitudinal direction at least in the side flap portion.
The absorbent article according to any one of claims 1 to 10, wherein the ridge shape is formed at least in the waist flap portion over the entire area in the width direction.
The exterior sheet is composed of a composite sheet in which two non-stretchable sheets are joined via an adhesive coated in a striped shape.
In the longitudinal groove portion or the width direction groove portion, the two non-stretchable sheets are joined via the adhesive.
In the longitudinal ridge or the width ridge, one of the two non-stretchable sheets is separated from the other non-stretchable sheet in the adhesive non-arranged portion where the adhesive is not arranged. The absorbent article according to any one of claims 1 to 11, which is prominent in the above.
The aspect according to any one of claims 1 to 12, wherein at least the dorsal region has a joint portion in which the exterior sheet and the absorbent body are joined, and a non-joint portion in which the exterior sheet and the absorbent body are not joined. Absorbent article.
At least the dorsal region has a joint portion to which the exterior sheet and the absorbent body are joined, and a non-joint portion which is not joined, and the non-joint portion includes the adhesive non-arranged portion and the absorption portion. The absorbent article according to claim 12, which overlaps in the thickness direction of the sex article.