JP7252831B2 - 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, and a surface that is closer to the wearer's skin than the absorbent body. It is provided with a sheet and a leak-proof sheet made of a resin film or the like arranged farther from the wearer's skin than the absorber, and if necessary, an exterior sheet is arranged outside the leak-proof sheet. Sometimes. In such absorbent articles, various improvements for improving appearance and wearability have been studied.

In Patent Document 1, a pattern is printed on the outer surface of a target tape made of a nonwoven fabric for the purpose of improving the visibility of a pattern arranged on the outer side of a diaper, and constituent fibers of the nonwoven fabric are adhered to each other. It is described that the adhesive line is formed in a wave shape extending in the width direction of the diaper.

Further, Patent Document 2 discloses a diaper in which an elastic film is arranged between a top sheet and a back sheet on the back side of the absorbent body for the purpose of improving wearability on the back side of the wearer when changing the diaper. disclosed. In this stretchable film, at least one stretchable layer is sandwiched between two non-stretchable layers, and in the natural state of the diaper, a plurality of wrinkles extending in the longitudinal direction of the product reach the edge on the dorsal side. It is also described in the same document that the back sheet is formed as follows.

Japanese Patent Publication No. 2012-526642 JP 2015-202251 A

By the way, in an absorbent article such as a diaper, the humidity inside the diaper may increase due to sweat of the wearer and water vapor generated from the absorbed and retained excrement liquid. An increase in humidity may cause discomfort when wearing the product or cause skin rashes. is commonly used. In this case, depending on the surrounding environment, water vapor released to the outside through the leak-proof sheet may condense on the non-skin facing surface of the diaper or the like.

Moisture generated by condensation does not seep out from within the absorbent article, but it dampens the clothing located in the abdomen and legs, and induces urine leakage in the wearer due to the perception of dampness of the clothing. There is a risk of causing various discomforts such as increased anxiety about urine leakage. In addition, moisture generated by condensation may mislead the user into thinking that leakage has occurred from the absorbent article. The suppression of such dew condensation is not considered at all in the techniques described in the above-mentioned patent documents.

Accordingly, an object of the present invention is to provide an absorbent article that suppresses discomfort caused by water vapor released to the outside of the absorbent article and misidentification of leakage, and improves comfort when worn.

The present invention comprises 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 perpendicular to the longitudinal direction, An absorbent article comprising 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,
An exterior sheet is arranged on the non-skin facing side of the absorbent main body,
The exterior sheet is formed with longitudinal ridges and grooves alternately having longitudinal ridges and longitudinal grooves extending in the longitudinal direction,
The longitudinal groove shape provides an absorbent article formed in a region overlapping the absorbent body in the thickness direction in the crotch region.

ADVANTAGE OF THE INVENTION According to the present invention, there is provided an absorbent article that suppresses discomfort caused by water vapor released to the outside of the absorbent article and misidentification of leakage, thereby improving comfort when worn.

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. FIG. 3 is a developed plan view schematically showing the non-skin-facing surface side (outer surface side) of the absorbent article shown in FIG. 1 in its unfolded and stretched state. FIG. 4 is a cross-sectional view of the absorbent article shown in FIG. 1 taken along line II-II. FIG. 5 is a developed plan view schematically showing the non-skin facing surface side (outer surface side) in the developed and stretched state in another embodiment of the absorbent article of the present invention. FIG. 6 is a developed plan view schematically showing the non-skin-facing surface side (outer surface side) in the developed and stretched state in still another embodiment of the absorbent article of the present invention. FIG. 7 is a developed plan view schematically showing the non-skin-facing surface side (outer surface side) in the developed and stretched state in still another embodiment of the absorbent article of the present invention. FIG. 8 is a developed plan view schematically showing the non-skin facing surface side (outer surface side) in the developed and stretched state in still another embodiment of the absorbent article of the present invention. FIG. 9 is a developed plan view schematically showing the non-skin facing surface side (outer surface side) in the developed and stretched state in still another embodiment of the absorbent article of the present invention. 10 is a perspective view schematically showing a wearing state of the absorbent article shown in FIG. 9. FIG. FIG. 11(a) is an enlarged view of a main part of the cross section of the absorbent article shown in FIG. 2, and FIG. 11(b) is an enlarged view of a main part of the non-skin facing side of the absorbent article shown in FIG. be.

Hereinafter, the absorbent article of the present invention will be described based on its preferred embodiments. 1 to 4 show an unfolded disposable diaper (hereinafter also simply referred to as "diaper") which is a preferred embodiment of the absorbent article of the present invention. FIG. 1 shows the configuration of the diaper 1 viewed from the side facing the skin. The diaper 1 shown in FIG. It has a longitudinal direction X extending from the side to the dorsal side through the crotch portion and a width direction Y orthogonal thereto. The diaper 1 has a ventral region F and a dorsal region R which are arranged on the wearer's ventral side and dorsal side when the diaper 1 is worn, and a crotch region M located between the ventral region F and the dorsal region R. and have. Each area is an area obtained by dividing the entire length of the diaper 1 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 excretory part facing portion (not shown) that is arranged to face the excretory part of the wearer when the diaper 1 is worn.

As shown in FIGS. 1 and 2, a diaper 1 comprises a liquid-permeable surface sheet 2 forming a skin-facing surface and a liquid-impermeable (including water-repellent) leak-proof sheet forming a non-skin-facing surface. 3. An absorbent body 4 is arranged between the surface sheet 2 and the leak-proof sheet 3, and these members constitute the absorbent main body 1A. 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 1 .

As shown in FIGS. 1 and 2, the diaper 1 includes a liquid-retaining absorbent body 4. As shown in FIG. 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 absorbent body 4 are located inward of the longitudinal edges of the diaper 1 .

In this specification, the "unfolded and stretched state" of the diaper 1 means that the diaper 1 is in the unfolded state, and the elastic members of each part of the diaper 1 in the unfolded state are stretched to the design dimensions (the influence of the elastic members is completely eliminated). It is the same as the dimension when it is spread flat in the state). 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 diaper. This is the side facing away from 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. "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 1 viewed from the non-skin facing side. Although the leak-proof cuff 6 and each elastic member 62, 85, which will be described later, are not shown in the figure, they are only shown as such for the convenience of explanation. It is configured.

As shown in FIGS. 2 and 3, an exterior sheet 5 is arranged on the non-skin facing side of the absorbent body 1A. The outer sheet 5 is a member that forms the outer surface of the diaper 1 that is visible from the outside when the diaper 1 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 main body 1A. In addition, the exterior sheet 5 forms the outer shape of the diaper 1 in the unfolded and stretched state, and the peripheral edge of the exterior sheet 5 forms the outlines of the ventral area F, the crotch area M, and the dorsal area R. 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 and extending in one direction, and grooves 52 positioned between the ridges 51 alternately. A groove shape 5A is formed. The exterior sheet 5 is joined to the leak-proof sheet 3 via an adhesive 53 at the portion where the groove 52 is formed. In the embodiment shown in the figure, the adhesive 53 forms joint regions that extend in the longitudinal direction X and are intermittently arranged in the width direction Y. As shown in FIG. That is, the exterior sheet 5 and the leak-proof sheet 3 are intermittently joined in the width direction Y in a plurality of joining regions extending in the longitudinal direction X. As shown in FIG. Further, the ridges 51 shown in the same figure are formed so as to protrude away from the leak-proof sheet 3, and the region of the ridges 51 defined by the exterior sheet 5 and the leak-proof sheet 3 is hollow. ing. On the other hand, the leak-proof sheet 3 is substantially flat. The ridged groove shape 5A having the ridged portion 51 and the grooved portion 52 is formed at least in a region overlapping the absorber 4 in the thickness direction Z in the crotch region M.

The outer sheet 5 may be formed of a single layer as shown in FIG. 2, or alternatively, a laminate of a plurality of sheets may be used. Specifically, the exterior sheet 5 is made of two nonwoven fabrics that are intermittently joined at a plurality of locations in the width direction Y of the diaper 1, and one of the two nonwoven fabrics is attached to the other nonwoven fabric. A ridge portion 51 may be formed in the non-bonded portion so as to protrude in a direction away from the other nonwoven fabric. In that case, the ridge 51 preferably has a hollow region defined by one nonwoven fabric and the other nonwoven fabric. Moreover, the two nonwoven fabrics may independently have either a single-layer structure or a laminated structure of two or more layers. Instead of forming a hollow portion between the exterior sheet 5 and the leak-proof sheet 3 or between the two nonwoven fabrics that constitute the exterior sheet 5, the ridge portion 51 has a hollow portion inside the ridge portion. The ridge may have a low-density portion having a lower fiber density than the surface portion.

In the embodiment shown in FIGS. 1 to 3, the ridges 51 and the grooves 52 formed in the exterior sheet 5 are formed in a plurality of straight lines extending in the longitudinal direction X, and alternately in the width direction Y. Lined up. 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 ventral region F to the dorsal region R so as to include a region overlapping the absorber 4 in the crotch region M in the thickness direction Z, It is formed so as to reach both longitudinal ends of the diaper 1 . Further, the ridge groove shape 5A is formed outside in the width direction Y of both side edges along the longitudinal direction X of the absorber 4 in addition to the region overlapping the absorber 4 in the thickness direction Z. As shown in FIG. In the following description, the ridges 51 extending in the longitudinal direction X of the diaper 1 are also referred to as "longitudinal ridges 51", and the grooves 52 extending in the longitudinal direction X of the diaper 1 are also referred to as "longitudinal grooves 52". 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".

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 1 . 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 leakage-preventing cuff 6 stands up at least in the crotch region M by contracting the elastic member 62 arranged in a stretched state when the diaper 1 is put on, thereby preventing excrement such as urine from flowing outward in the width direction Y. prevent

As shown in FIGS. 1 to 4, the exterior sheet 5 extends outward in the width direction Y from both side edges along the longitudinal direction X of the absorbent main body 1A, and the leakage prevention cuffs constituting the leakage prevention cuffs 6 are provided. A side flap portion S is formed together with the forming sheet 61 . The side flap portion S has a pair of ventral side flap portions Sf, Sf formed in the ventral region F and a pair of dorsal side flap portions Sr, Sr formed in the dorsal region R. The absorbent main body 1A has the width of the minimum width portion of the crotch region M and is a region covering the entire length of the diaper 1 in the longitudinal direction X. In each of the side region F and the back region R, it is a portion located outside in the width direction Y from both side edges along the longitudinal direction X of the absorbent main body 1A. In FIG. 1, the boundary line between the absorbent main body 1A and the ventral side flap portion Sf or the dorsal side flap portion Sr of the diaper 1 is indicated by a dashed line. The side flap portions S are not limited to those formed from the exterior sheet 5 and the leak-proof cuff forming sheet 61 . For example, the structure may further include members extending outward in the width direction Y from both side edges of the absorbent body 4 , such as the top sheet 2 and the leak-proof sheet 3 . The members constituting the side flap portions S are preferably joined to each other at the extending portions from the side edges of the absorber 4 by known joining means such as adhesive, heat sealing, and ultrasonic sealing.

As shown in FIGS. 1 and 3, in the diaper 1 of this embodiment, a pair of fastening tapes 7, 7 are provided on a pair of dorsal side flap portions Sr, Sr formed in the dorsal region R. . Each fastening tape 7 is arranged so as to extend from both side edges in the width direction Y of each dorsal side flap portion. One end of each fastening tape 7 is, as shown in FIG.

As shown in FIGS. 1 and 4, ventral and dorsal side flap portions S each include a ventilation portion 1T, which is a portion having fewer constituent members of the side flap portion S than other portions of the side flap portion S. is preferably formed. In this embodiment, the ventilation part 1T in the dorsal side flap part Sr is a part located outside the absorbent main body 1A in the width direction Y and inside the fastening tape 7 in the width direction Y. The ventilation part 1T in the side flap part Sf is formed in substantially the entire area of the ventral side flap part Sf. As shown in FIG. 4, the ventilation part 1T in the present embodiment is a part composed of the exterior sheet 5 and the leakage prevention cuff forming sheet 61 in the side flap part S, and an adhesive or the like is applied between these sheets. Not spliced with

The non-skin facing surface of the abdominal region F of the diaper 1 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. can. 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 the embodiment shown in FIG. 3, the exterior sheet 5 forming the non-skin-facing surface in the ventral region F of the diaper 1 serves as the fastening region 7A.

As shown in FIG. 1, on both sides along the longitudinal direction X of the diaper 1, a plurality of leg elastic members 85 for forming leg gathers are arranged in a stretched state along the longitudinal direction X. The contraction of member 85 allows leg gathers to be formed. In this embodiment, elastic members are not present in the longitudinal end regions of the abdomen region F and the dorsal region R of the diaper 1, but as long as the effects of the present invention are exhibited, for example, elastic members may be provided. It may be further arranged in a stretched state in the width direction Y so that waist gathers can be formed by contraction of the elastic member.

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, spunlaced nonwoven fabrics, heat roll nonwoven fabrics, meltblown nonwoven fabrics, or laminated nonwoven fabrics thereof can be used. The exterior sheet 5 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.

Among these, it is preferable to use an air-through nonwoven fabric as the exterior sheet 5 from the viewpoint of improving the wearer's comfort by increasing the breathability of the diaper and from the viewpoint of improving the formation efficiency of the ridged groove shape 5A, and the nonwoven fabric is a single layer. It is also preferable to use in

The ridge groove shape 5A having the above-described configuration is obtained, for example, by applying a strip of adhesive to one surface of one sheet to which tension is applied and then applying a plurality of strips of adhesive to the other sheet to which tension is higher than that of the one sheet. is laminated on the adhesive-coated surface of the one sheet to form a laminated sheet, and then the tension applied to the laminated sheet is made lower than the tension applied to the other sheet. be able to.

Taking the leak-proof sheet 3 and the exterior sheet 5 that constitute the diaper 1 as an example, a detailed explanation will be given. Preferably, the adhesive is applied in strips in a plurality of strips so as to extend in the direction along which the leak-proof sheet 3 is conveyed. In other words, in the leak-proof sheet 3, the applied portion (joint region) to which the adhesive is attached and the non-applied portion to which the adhesive is not attached are preferably arranged in a direction intersecting the conveying direction of the leak-proof sheet 3. They are alternately formed in a direction perpendicular to the direction in which the leak-proof sheet 3 is conveyed.

Next, the leak-proof sheet 3 to which the adhesive is applied and the long belt-shaped exterior sheet 5 are attached together while tension is applied in the same direction as the conveying direction of the leak-proof sheet 3 . At this time, the tension applied to the exterior sheet 5 is set in the same direction as the direction in which the leak-proof sheet 3 is conveyed, and is in a state higher than the tension during conveyance of the leak-proof sheet 3 (hereinafter, this state is referred to as the "high tension state"). ”). The exterior sheet 5 in a high-tension state is stretched in the conveying direction compared to the exterior sheet 5 to which no tension is applied, so that the exterior sheet 5 is bonded to the leak-proof sheet 3 in a state where the width of the exterior sheet 5 is reduced. be done.

After that, the tension applied to the laminated sheets is adjusted to the tension applied when the leak-proof sheet 3 is conveyed, and the sheet is conveyed to a downstream process. Since the tension applied to the exterior sheet 5 after the sheets are bonded together becomes lower than the tension applied to the exterior sheet 5 before the sheets are bonded together, the high tension state of the exterior sheet 5 is released. be. As a result, the width of the exterior sheet 5 recovers so as to expand in the width direction Y, and the exterior sheet 5 located in the non-applied portion protrudes away from the leak-proof sheet 3, and the adhesive is applied along the adhesive application direction. The ridge portion 51 extends along the length of the groove. Also, since the exterior sheet 5 positioned at the application portion is fixed without being separated from the leak-proof sheet 3, the exterior sheet 5 positioned at the application portion forms the groove portion 52 extending along the application direction of the adhesive. Thus, the ridge groove shape 5A extending in one direction is formed in the exterior sheet 5. As shown in FIG. In the case of manufacturing the diaper 1 in which the ridges 5A are arranged to extend in the longitudinal direction, the outer packaging is arranged so that the longitudinal direction of the target diaper 1 and the extending direction of the ridges 51 and the grooves 52 are aligned. A laminated sheet including the sheet 5 may be cut to form a diaper.

When forming the ridge groove shape 5A on the exterior sheet 5 composed of a plurality of sheets, for example, an adhesive is applied in a strip shape to the inner layer side sheet constituting the skin-facing side of the diaper 1 in the exterior sheet 5. A plurality of strips are applied, and then the inner layer side sheet and the other sheet in the high tension state are adhered. After that, the high tension state of the other sheet is released, and the groove shape 5A is formed in the other sheet. It is preferable to use an air-through nonwoven fabric for at least the other sheet of the exterior sheet 5 in this embodiment.

According to the absorbent article of the present invention having the above configuration, since the longitudinal ridge groove shape composed of the ridges and grooves extending in the longitudinal direction is formed in the crotch region, no ridge groove shape is formed. Compared to absorbent articles, it is possible to facilitate the movement of water vapor generated from excreted liquids such as urine absorbed and retained in the absorbent body from the crotch region toward the abdominal region and the back region. As a result, it is possible to suppress discomfort caused by water vapor released to the outside of the absorbent article and false recognition of leakage.

Specifically, excretory fluids such as urine are absorbed in the crotch region facing the excretory part and its vicinity, so water vapor generated from excreted fluid is likely to be generated in the crotch region, and the water vapor is released from the crotch region. It is common to be in a state in which a large amount is released to the outside of the absorbent article. In this regard, according to the present invention, the longitudinal ridges are formed in the crotch region, so that the ridges and grooves serve as flow paths for water vapor. It moves from the region toward the ventral region and the dorsal region, and diffuses in the front-rear direction of the wearer to facilitate release. As a result, when the absorbent article of the present invention is worn, the water vapor generated from the excreted fluid is less likely to condense. 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. . Furthermore, since the release of water vapor in the diaper can be accelerated, it is possible to reduce stuffiness when wearing the diaper. That is, according to the absorbent article of the present invention, it is possible to improve comfort when worn.

From the viewpoint of making the above effect more remarkable, as shown in FIG. 4 in the thickness direction Z, it is preferably formed from the ventral region F to the dorsal region R, and is formed so as to reach both ends in the longitudinal direction of the diaper 1 . More preferred. Moreover, it is more preferable that the longitudinal groove shape 5A includes regions overlapping in the thickness direction Z with the absorbers 4 located in the ventral region F and the dorsal region R, respectively.

As another embodiment different from the embodiment shown in Figs. 1 to 4, it is also preferable to employ the embodiment of the non-skin facing surface of the diaper 1 shown in Figs. 5 to 8 . The embodiment described below will be described with a focus on points that differ from the above-described embodiment, and the description of the above-described embodiment will be appropriately applied to points that are not particularly described. The same reference numerals are assigned to the same points as in the above-described embodiment, and the description thereof is omitted.

In the embodiment shown in FIG. 5 , a plurality of widthwise ridges 56 extending in the width direction Y of the diaper and widthwise grooves 57 are alternately provided on the non-skin facing surface side of the exterior sheet 5 in the ventral region F. A directional groove shape 5B is formed. As shown in the figure, the widthwise ridges 5B may be formed in a wavy shape in a plan view of the diaper 1, or may be formed in a straight line extending in the width direction. The width direction ridges 5B are arranged so as to extend over the central region and both side regions of the absorbent article 1 in the width direction Y, preferably the region where the longitudinal ridges 5A are formed and the thickness Overlapping in direction Z. The forming region of the widthwise groove shape 5B and the fastening region 7A described above may overlap each other or may be different. By having such a configuration, a water vapor flow path extending in the width direction Y of the diaper 1 is further formed, so that the water vapor that has moved from the crotch region M to the abdominal region F and the abdominal region F and The water vapor generated from the vicinity thereof can be diffused and emitted in the abdominal direction and the direction along the waist. As a result, misidentification of leaks, especially in the abdomen, can be reduced.

Moreover, in the embodiment shown in FIG. 6, the width direction ridge groove shape 5B having the width direction ridge portions 56 and the width direction groove portions 57 alternately forms a non-skin layer of the exterior sheet 5 in the ventral region F and the dorsal region R. They are respectively formed on the opposing surface sides. Each width direction ridge groove shape 5B shown in FIG.

The width direction ridges 5B are arranged so as to extend over the central region and both side regions of the absorbent article 1 in the width direction Y, preferably the region where the longitudinal ridges 5A are formed and the thickness They overlap each other in the direction Z. As shown in the figure, the width direction groove shape 5B formed in the dorsal region R is, when viewed along the width direction Y, the formation region of the width direction groove shape 5B and the arrangement of the fastening tape 7. position overlaps. Alternatively, the widthwise ridges 5B formed in the dorsal region R may be formed longitudinally inward of the arrangement position of the fastening tape 7 in a plan view of the diaper 1 . By having such a structure, the flow paths for water vapor extending in the width direction Y of the diaper 1 are formed on both the ventral side and the dorsal side. The water vapor that has moved to the region R, and the water vapor generated from the ventral region F, the dorsal region R, and their vicinity can be diffused and released in the front-rear direction and the waist circumference direction of the wearer. As a result, false recognition of leaks, especially in both the abdomen and the back, can be reduced. In addition, in the dorsal region R, the sweat of the wearer and water vapor resulting from the sweat are likely to be generated, so that the efficiency of transpiration of sweat can be enhanced to further reduce stuffiness when worn. As a result, it is possible to further enhance the comfort during wearing.

In the embodiment shown in FIG. 7, a second exterior member separate from the exterior sheet is arranged on the non-skin facing side of the exterior sheet 5, and the width direction ridge groove shape 5B is formed in the second exterior member. It is The second exterior member shown in the figure is a landing tape 7B that constitutes a fastening region 7A of the fastening tape 7. As shown in FIG. The landing tape 7B is arranged on the non-skin facing side of the ventral region F as a separate sheet from the exterior sheet 5 . In the present embodiment, the forming region of the widthwise groove shape 5B and the fastening region 7A described above overlap each other.

The landing tape 7B has a rectangular shape in plan view, and is arranged so that the longitudinal direction of the landing tape 7B, the width direction Y of the diaper 1, and the extending direction of the width direction ridges 5B are aligned with each other. ing. The landing tape 7B is joined to at least the central region in the width direction Y of the non-skin-facing surface of the ventral region F by a known joining means such as an adhesive, heat sealing, or ultrasonic sealing. The landing tape 7B in this embodiment may be formed with, for example, a widthwise ridge groove shape 5B, and then the landing tape 7B may be joined to the exterior sheet 5. As shown in FIG. With such a structure, water vapor generated from excrement and sweat can be diffused and released in the direction around the waist, and the water vapor released outside the diaper can be prevented from re-introducing into the diaper. , resulting in enhanced wearer comfort. From the viewpoint of making this effect remarkable, it is preferable that the landing tape 7B is arranged so as to overlap in the thickness direction Z with the longitudinal groove shape 5A formed in the ventral region F.

In the embodiment shown in FIG. 8, a second exterior member (landing tape 7B) having widthwise ridges 5B is arranged on the non-skin-facing side of the exterior sheet 5 in the ventral region F. As shown in FIG. In addition to this, a width direction ridge groove shape 5B is further arranged on the non-skin facing surface side of the exterior sheet 5 in the back region R. The widthwise ridges 5B formed in the dorsal region R are formed in a portion of the exterior sheet 5 where the second exterior member is not arranged. In the present embodiment, the widthwise ridges 5B formed in the dorsal region R are formed directly on the exterior sheet 5. As shown in FIG. With such a configuration, the water vapor generated from the excreted liquid absorbed in the crotch region M can be diffused and released in multiple directions, and the water vapor released to the outside of the diaper can be released by the second exterior member. Reflow into the diaper can be prevented. In addition, in the dorsal region R, the width direction ridges 5B are formed in the part where the second exterior member is not arranged, so that the sweat transpiration efficiency is improved and the stuffiness when worn is reduced. can do. As a result, it is possible to further enhance the comfort during wearing. From the viewpoint of making this effect even more remarkable, the width direction ridge groove shape 5B formed in the ventral region F and the dorsal region R has a longitudinal direction extending to the ventral region F and the dorsal region R, respectively. It is also preferable that it is formed so as to overlap in the thickness direction Z with the directional ridge groove shape 5A.

In the embodiment shown in FIG. 9, a plurality of flap elastic members 87 extending in the width direction Y are arranged on each of the dorsal side flap portions Sr, Sr. The flap elastic members 87 are arranged from the ventilation part 1T in the back side flap part Sr to the leakproof sheet 3 in the absorbent main body 1A, and each flap elastic member 87 extends substantially parallel to each other. In this embodiment, for convenience of explanation, the second exterior member (landing tape 7B) having the widthwise groove shape 5B is arranged in the ventral region F, and the widthwise groove in the dorsal region R. A mode in which the shape 5B is not formed will be described, but instead of this, a mode in which the above-described embodiments are appropriately combined may be used. For example, the diaper 1 may have widthwise grooves 5B formed in both the ventral area F and the dorsal area R.

FIG. 10 schematically shows the worn state of the diaper 1 of the embodiment shown in FIG. When the diaper 1 is worn, the ventral side flap portion Sf and the back side flap portion Sr are arranged so as to overlap each other. Specifically, the ventral side flap portion Sf is arranged on the wearer's skin facing surface side, and the dorsal side flap portion Sr is arranged so as to cover the non-skin facing surface side of the ventral side flap portion Sf. , the fastening tape 7 is fixed to the landing tape 7B as the fixing region 7A, and the worn state is maintained. When viewed outward from the wearer's body surface, the ventral side flap portion Sf and the dorsal side flap portion Sr overlap in this order.

In this state, it is preferable that a highly breathable region 1V having high air permeability exists in a region where the ventral side flap portion Sf and the dorsal side flap portion Sr overlap each other. Moreover, it is also preferable that the high air permeability region 1V is formed so as to be positioned in the extending direction of the widthwise groove shape 5B. The highly breathable region 1V refers to a region where at least the leakproof sheet 3 is not arranged when the diaper 1 is worn. With such a configuration, the water vapor diffused in the direction along the waist via the width direction ridge groove shape 5B is more likely to be released from the high ventilation region 1V, thereby further reducing stuffiness in the diaper. be able to.

Further, the flap elastic member 87 extending in the width direction Y is preferably arranged so as to overlap the high ventilation region 1V formed by overlapping the ventral side and dorsal side flap portions Sf and Sr. With such a configuration, the high ventilation region 1V is easily expanded and contracted along with the elastic member 87 to follow changes in the posture of the wearer. Since the water vapor diffused in the direction is more likely to be released from the high ventilation region 1V, it is possible to further reduce stuffiness in the diaper.

From the viewpoint of further enhancing the effects described above, the high ventilation region 1V is such that the members formed by overlapping the ventral side and dorsal side flap portions Sf and Sr are different from the other members constituting the side flap portions S. In particular, it is more preferable that the ventilation portions 1T in the ventral and dorsal side flap portions Sf and Sr are overlapped with each other.

In the case where the diaper 1 is formed with the grooves 5B in the width direction, the water vapor that has moved from the crotch region M to the ventral region F can be efficiently released in the width direction Y, and the comfort when worn is improved. , the cross-sectional area along the longitudinal direction X of the width direction groove portion 57 is preferably larger than the cross-sectional area along the width direction Y of the longitudinal direction groove portion 52 . Specifically, the cross-sectional area along the longitudinal direction X of the width direction groove portion 57 is preferably 0.5 mm ² or more, more preferably 0.8 mm ² or more, and preferably 10 mm ² or less, more preferably 5 mm ² . It is below. Similarly, the cross-sectional area along the width direction Y of the longitudinal groove 52 is preferably 0.1 mm ² or more, more preferably 0.3 mm ^{2 or more, and preferably 5 mm 2 or} less, more preferably 2 mm ² or less. is.

The cross-sectional area of each groove 52, 57 can be measured, for example, by the following method. In the portion where the longitudinal direction groove 52 or the width direction groove 57 of the outer sheet 5 is formed, the outer sheet 5 is cut with a sharp razor along the direction orthogonal to the extending direction of the groove to be measured. get a face Using a microscope (for example, Digital Microscope VHX-1000 manufactured by Keyence Corporation), the area where two adjacent ridges and a groove disposed between the ridges exist is included in the field of view of the cut surface. Observe at a magnification of 10 to 100 times with no load. Next, from the obtained observation image, the outline of the non-skin facing surface of the ridge and groove on the cut surface and the top of the ridge are specified, respectively, and the imaginary straight line connecting each top of the ridge and the line of the ridge and groove Measure the area of the area enclosed by the outline of the non-skin facing surface. This measurement is performed on five or more grooves, and the arithmetic average value of the areas is taken as the cross-sectional area of the grooves to be measured. Further, when an external force acts on the outer sheet to be measured for a long time, it is specifically incorporated into an absorbent article such as a disposable diaper, and the absorbent article is stored in a state of being compressed and filled in a package. If so, in order to eliminate the influence of the external force, remove the outer sheet from the absorbent article, leave it for one day or more in an environment of normal temperature and normal pressure, and cut it with a razor as described above.

When a sheet-like second exterior member is further provided, the second exterior member is made of a material that is more dense than the material of the exterior sheet 5, from the viewpoint of effectively preventing the water vapor released to the outside of the diaper from flowing back into the diaper. High ventilation resistance is preferred.

Specifically, the ventilation resistance of the second exterior member is preferably 0.005 kPa s/m or more, more preferably 0.01 kPa s/m or more, and preferably 0.2 kPa s/m or less. 0.1 kPa·s/m or less is more preferable. In addition, the ventilation resistance of the exterior sheet 5 is preferably 0.001 kPa·s/m or more, more preferably 0.003 kPa·s/m or more, and preferably 0.1 kPa·s/m or less, and 0.05 kPa·s/m or less. s/m or less is more preferable. Airflow resistance can be measured using, for example, AUTOMATIC AIR-PERMEABILITY TESTER KES-F8-AP1 (air permeability tester) manufactured by Kato Tech. A large value of airflow resistance obtained by the above-described measurement method means that it takes time for air to pass through, and thus means that the air permeability of the material to be measured is low.

When the landing tape 7B is used as the second exterior member, the material constituting the landing tape 7B is preferably a material capable of fixing the fastening tape 7. For example, a fiber sheet such as various nonwoven fabrics similar to the exterior sheet 5, , a resin film, or the like can be used. From the viewpoint of improving air permeability, it is preferable to use a fiber sheet such as various non-woven fabrics similar to the exterior sheet 5 .

The widthwise groove portion 57 in the widthwise groove shape 5B is preferably formed by consolidating the constituent material from which the widthwise groove shape 5B is formed. Since the width direction groove portion 57 is compacted, the high-density portion and the low-density portion of the constituent material are formed at regular intervals. Released water vapor is prevented from reentering the diaper, resulting in increased comfort for the wearer. When the widthwise grooves 57 are formed by densification, the widthwise ridges 56 located between the widthwise grooves 57 are not densified, or the degree of densification is weaker than that of the widthwise grooves 57 . ing.

In order to form such a width direction ridge groove shape 5B, for example, the constituent member or constituent material to be formed is subjected to embossing, or a mold having a shape complementary to the desired shaping shape is used. It can be performed by applying a process such as pressing against a member or the like to shape it. Further, when distributing diapers to the market, when a plurality of diapers 1 provided with the second exterior member having the widthwise groove shape 5B formed in the ventral region F are arranged adjacent to each other and stored in a compressed state, The second outer member of one diaper 1 and the outer sheet of the other diaper 1 are brought into contact and pressed. As a result, the dorsal region R of the other diaper 1 can be formed in a shape complementary to the widthwise groove shape 5B formed in the second exterior member in the process of market distribution.

From the viewpoint of reducing discomfort caused by water vapor released to the outside of the diaper and misrecognition of leakage and improving the feel of the diaper, the numbers of the ridges 51 and the grooves 52 forming the ridge-groove shape 5A are independent of each other. It is preferably 8 lines/10 cm or more, more preferably 16 lines/10 cm or more, and preferably 100 lines/10 cm or less, further preferably 80 lines/10 cm or less. The numbers of the ridges 51 and the grooves 52 can be appropriately adjusted, for example, by changing the application width of the adhesive linearly applied to the exterior sheet 5 and the interval between the adhesive lines. The numbers of the ridges 51 and the grooves 52 are counted by aligning an imaginary straight line extending in a direction orthogonal to the extending direction of the ridges 51 and the grooves 52 in a plane view of the seat. , the number of ridges intersecting the imaginary straight line is the number of ridges 51, the number of grooves intersecting the imaginary straight line is the number of grooves 52, and the number of ridges 51 existing per 10 cm of the imaginary straight line and the number of grooves 52 are obtained. If the numbers of the ridges 51 and the grooves 52 differ depending on the position where the imaginary straight line is drawn, the maximum of these numbers is the number of the ridges 51 existing per 10 cm, or the number of the grooves 52 existing per 10 cm. defined as the number of

From the same point of view, the height H1 (see FIG. 11(a)) of the longitudinal ridges 51 is preferably 0.2 mm or more, more preferably 0.4 mm or more, and preferably 3 mm or less, more preferably is 2 mm or less. The height H1 of the ridge 51 is the distance between the surface of the outer sheet 5 forming the groove 52 and the top surface of the ridge 51 . The height H1 of the ridges 51 can be adjusted, for example, by changing the application width of the adhesive linearly applied to the exterior sheet 5 and the interval between the adhesive lines, by changing the constituent material of the exterior sheet 5, or by changing the high tension. It can be appropriately adjusted by changing the tension applied to the exterior sheet 5 in the state.

From the same point of view, the total width W1 (see FIG. 11(a)) of the longitudinal ridge 51 along the width direction Y is preferably 0.2 mm or more, more preferably 0.4 mm or more. It is 12 mm or less, more preferably 6 mm or less. The overall width W2 (see FIG. 11(a)) along the width direction Y of the longitudinal groove 52 is preferably substantially non-existent (that is, the overall width W2 is zero), more preferably greater than 0 mm, and even more preferably is 0.2 mm or more, preferably 5 mm or less, more preferably 2 mm or less. Each of the full widths W1 and W2 can be appropriately adjusted by, for example, changing the width of the adhesive applied to the exterior sheet 5 or the spacing between the adhesive rows.

The height H1, the overall width W1 and the overall width W2 described above can be measured, for example, by the following methods. That is, the sample in which the ridges 51 and the grooves 52 are formed is cut with a sharp razor along the direction orthogonal to the extending direction of the ridges 51 and the grooves 52, and the cut surface is observed with the microscope described above. Then, the shortest distance between the non-skin facing surface forming the groove 52 and the upper surface (non-skin facing surface) of the top of the ridge 51 is measured, and the obtained value is defined as the height H1 of the ridge. In the cut plane, the boundary points between the ridges 51 and the grooves 52 are specified from the contour lines of the non-skin-facing surfaces of the ridges 51 and the grooves 52, and the shortest distance between the boundary points measured so as to sandwich the ridges 51. (see FIG. 11(a)) is the total width W1, and the shortest distance between the boundary points (see FIG. 11(a)) measured across the groove 52 is the total width W2. The boundary point refers to a boundary point where the convex shape observed on the cut surface changes to a straight line extending along the contour of the groove, and a boundary point where the straight line changes to a convex shape, and the boundary point is , can be specified by obtaining an inflection point from a tangent line drawn with respect to the outline of the ridge 51 and the groove 52 . If the boundary point cannot be specified, the intersection of the imaginary straight line connecting the midpoints at the height H1 of each ridge 51 and the contour line on the non-skin facing surface of the ridge 51 is the boundary point between the boundary points measured. The shortest distance is the full width W1, and the full width W2 is zero. Further, when an external force acts on the outer sheet to be measured for a long time, it is specifically incorporated into an absorbent article such as a disposable diaper, and the absorbent article is stored in a state of being compressed and filled in a package. If so, in order to eliminate the influence of the external force, remove the outer sheet from the absorbent article, leave it for one day or more in an environment of normal temperature and normal pressure, and cut it with a razor as described above.

In addition, from the viewpoint of reducing discomfort caused by water vapor released to the outside of the diaper and misrecognition of leakage and improving the texture of the diaper, the widthwise ridges 56 and the widthwise grooves 57 that constitute the widthwise ridged groove shape 5B. is preferably 5/10 cm or more, more preferably 10/10 cm or more, and preferably 50/10 cm or less, and 30/10 cm. More preferably: The number of width-direction ridges 56 and width-direction grooves 57 can be adjusted, for example, by appropriately changing processing dimensions in shaping the width-direction ridges. The number of width-direction ridges 56 and width-direction grooves 57 is calculated by drawing an imaginary straight line extending in a direction perpendicular to the extending direction of width-direction ridges 56 and width-direction grooves 57 in a plan view of the seat. The number of ridges intersecting the virtual straight line is the number of width direction ridges 56, and the number of grooves crossing the virtual straight line is the number of width direction grooves 57, and width direction ridges 56 present per 10 cm of the virtual straight line. and the number of width direction grooves 57 are calculated. If the number of width-direction ridges 56 and width-direction grooves 57 differs depending on the position where the imaginary straight line is drawn, the maximum of these numbers is the number of width-direction ridges 56 existing per 10 cm, or 10 cm It is defined as the number of width direction grooves 57 that are present on each side.

From the same point of view, the overall width W3 (see FIG. 11(b)) along the longitudinal direction X of the width direction ridges 56 is preferably 1 mm or more, more preferably 2 mm or more, and preferably 10 mm or less, more preferably is 5 mm or less. A full width W4 (see FIG. 11(b)) along the longitudinal direction X of the width direction groove 57 is preferably substantially non-existent (that is, the full width W4 is zero), more preferably greater than 0 mm, and even more preferably. is 0.5 mm or more, preferably 3 mm or less, more preferably 1.5 mm or less. The overall widths W3 and W4 can be adjusted, for example, by appropriately changing the processing dimensions in shaping the widthwise ridges. The full widths W3 and W4 are the minimum lengths at the time of measurement.

The overall width W3 and the overall width W4 described above can be measured, for example, by the following method. That is, a sharp razor is used to cut along the direction orthogonal to the extending direction of the widthwise ridges 56 and the widthwise grooves 57, and the cut surface is observed with the microscope described above. The shortest distance between the non-skin facing surface forming the width direction groove 57 and the upper surface (non-skin facing surface) of the top of the width direction ridge 56 is measured, and the obtained value is the height of the width direction ridge 56. (not shown). Further, on the cut surface, from the outline of the non-skin-facing surface of the width-direction ridges 56 and the width-direction grooves 57, the boundary points between the width-direction ridges 56 and the width-direction grooves 57 are identified, and the width-direction ridges 56 The shortest distance between the boundary points (see FIG. 11(b)) measured to sandwich the width W3, and the shortest distance between the boundary points measured to sandwich the width direction groove portion 57 (see FIG. 11(b)) The total width is W4. Boundary points can be identified in a manner similar to that described above. When the boundary point is unclear, the crossing point between the imaginary straight line connecting the midpoints of the heights of the widthwise ridges 56 and the contour line on the non-skin-facing surface of the widthwise groove 57 was measured as the boundary point. Let the shortest distance between the boundary points be the full width W3 and the full width W4 be zero. Further, when an external force acts on the outer sheet to be measured for a long time, it is specifically incorporated into an absorbent article such as a disposable diaper, and the absorbent article is stored in a state of being compressed and filled in a package. If so, in order to eliminate the influence of the external force, remove the outer sheet from the absorbent article, leave it for one day or more in an environment of normal temperature and normal pressure, and cut it with a razor as described above.

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 longitudinal groove shape 5A in each embodiment has been described as linear, it can be changed as long as the effects of the present invention are exhibited, and may be, for example, a wave shape. Similarly, although the width direction ridge groove shape 5B in each embodiment has been described as having a wavy shape, it can be changed as long as the effects of the present invention are exhibited, and for example, it may be a shape such as a linear shape. .

Further, the following absorbent article is disclosed in relation to the embodiment of the present invention described above.
<1>
Equipped with 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, along the longitudinal direction An absorbent article comprising an abdominal region, a crotch region and a dorsal region, wherein the absorbent body is arranged from the abdominal region to the dorsal region,
An exterior sheet is arranged on the non-skin facing side of the absorbent main body,
The exterior sheet is formed with longitudinal ridges and grooves alternately having longitudinal ridges and longitudinal grooves extending in the longitudinal direction,
The absorbent article, wherein the longitudinal groove shape is formed in a region overlapping the absorbent body in the thickness direction in the crotch region.

<2>
the exterior sheet and the leak-proof sheet are intermittently joined in the width direction in the joining region extending in the longitudinal direction;
The absorbent article according to <1>, wherein the longitudinal ridges are formed to protrude away from the leak-proof sheet.
<3>
The absorbent article according to <2>, wherein in the longitudinal ridges, regions defined by the exterior sheet and the leak-proof sheet are hollow.
<4>
The absorbent article according to any one of <1> to <3>, wherein the exterior sheet is an air-through nonwoven fabric.
<5>
The absorbent article according to any one of <1> to <4>, wherein the longitudinal groove shape is formed from the ventral region to the dorsal region.

<6>
The non-skin facing surface of the exterior sheet in the ventral region is formed with a widthwise ridge groove shape alternately having widthwise ridges and widthwise grooves extending in the widthwise direction. The absorbent article according to any one of <5>.
<7>
The non-skin-facing surface of the exterior sheet in each of the ventral region and the dorsal region has a widthwise ridge groove shape alternately having widthwise ridges and widthwise grooves extending in the width direction. The absorbent article according to any one of <1> to <6>.
<8>
The absorption according to <6> or <7>, wherein a second exterior member is arranged on the non-skin-facing surface side of the exterior sheet, and the width direction ridge groove shape is formed in the second exterior member. sexual goods.
<9>
The width direction ridge groove shape in the ventral region is formed in a second exterior member arranged on the non-skin facing surface side of the exterior sheet,
The absorbent article according to <8>, wherein the width direction ridge groove shape in the back region is formed in the exterior sheet on which the second exterior member is not arranged.

<10>
The absorbent article according to <8> or <9>, wherein the second exterior member has a higher airflow resistance than the material forming the exterior sheet.
<11>
The ventilation resistance of the second exterior member is 0.005 kPa s/m or more and 0.2 kPa s/m or less, preferably 0.01 kPa s/m or more and 0.1 kPa s/m or less. 10> the absorbent article.
<12>
<10> The airflow resistance of the outer sheet is 0.001 kPa·s/m or more and 0.1 kPa·s/m or less, preferably 0.003 kPa·s/m or more and 0.05 kPa·s/m or less. Or the absorbent article according to <11>.

<13>
The numbers of width-direction ridges and width-direction grooves that constitute the width-direction ridge-groove shape are each independently preferably 5/10 cm or more, more preferably 10/10 cm or more, The absorbent article according to any one of <6> to <12> above, which is preferably 50 lines/10 cm or less, more preferably 30 lines/10 cm or less.
<14>
The absorbent article according to any one of <6> to <13>, wherein the widthwise ridges have a total width along the longitudinal direction of 1 mm or more and 10 mm or less, preferably 2 mm or more and 5 mm or less.
<15>
The full width along the longitudinal direction of the width direction groove portion is substantially non-existent, or is preferably more than 0 mm and 3 mm or less, more preferably 0.5 mm or more and 1.5 mm or less, the above <6> to <14> The absorbent article according to any one of 14>.

<16>
The absorbent article according to any one of <6> to <15>, wherein the cross-sectional area of the widthwise groove is larger than the cross-sectional area of the longitudinal groove.
<17>
The absorbent article according to <16> above, wherein the cross-sectional area along the longitudinal direction of the width direction groove is 0.5 mm ² or more and 10 mm ² or less, preferably 0.8 mm ² or more and 5 mm ^{2 or} less.
<18>
The absorbent article according to <16> or <17> above, wherein the cross-sectional area along the width direction of the longitudinal groove is 0.1 mm ² or more and 5 mm ² or less, preferably 0.3 mm ² or more and 2 mm ^{2 or} less. .
<19>
The absorbent article according to any one of <6> to <18>, wherein the widthwise groove is formed by consolidating the material from which the widthwise groove is formed.

<20>
a pair of ventral side flap portions each extending outward in the width direction of the absorbent body in the ventral region;
a pair of dorsal side flap portions extending outward in the width direction of the absorbent body in the dorsal region,
Each dorsal side flap portion is provided with a fastening tape,
A landing tape for fastening the fastening tape is arranged in the ventral region,
The ventral side flap portion and the dorsal side flap portion are formed so as to overlap each other when the absorbent article is worn,
The absorbent article according to any one of <1> to <19>, wherein a highly breathable region is present in a region where the abdominal side flap portion and the dorsal side flap portion overlap each other.
<21>
An elastic member is arranged on each of the dorsal side flap portions,
The absorbent article according to <20>, wherein the elastic member and the highly breathable region overlap when the absorbent article is worn.

<22>
Any one of <1> to <21> above, wherein the number of longitudinal ridges is 8/10 cm or more and 100/10 cm or less, preferably 16/10 cm or more and 80/10 cm or less. absorbent article.
<23>
The number of the longitudinal grooves is 8/10 cm or more and 100/10 cm or less, preferably 16/10 cm or more and 80/10 cm or less, according to any one of <1> to <22>. absorbent article.
<24>
The absorbent article according to any one of <1> to <23>, wherein the longitudinal 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.
<25>
The absorbent article according to any one of <1> to <24>, wherein the longitudinal ribs have a total width along the width direction of 0.2 mm or more and 12 mm or less, preferably 0.4 mm or more and 6 mm or less. .
<26>
<1> to <25>, wherein the full width along the width direction of the longitudinal groove portion is substantially absent, or is preferably more than 0 mm and 5 mm or less, more preferably 0.2 mm or more and 2 mm or less. Absorbent article according to any one of.

1 Absorbent article (disposable diaper)
1A Absorbent main body 1V High ventilation area 2 Surface sheet 3 Leakproof sheet 4 Absorber 5 Exterior sheet 5A Longitudinal ridges 51 Longitudinal ridges 52 Longitudinal ridges 5B Width ridges 56 Width ridges 57 Width direction Groove 7 Fastening tape 7B Landing tape 87 Flap elastic member S Side flap F Abdominal region M Inseam region R Back region X Longitudinal direction Y Width direction Z Thickness direction

Claims (10)

Equipped with 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, along the longitudinal direction An absorbent article comprising an abdominal region, a crotch region and a dorsal region, wherein the absorbent body is arranged from the abdominal region to the dorsal region,
An exterior sheet is arranged on the non-skin facing side of the absorbent main body,
The exterior sheet is formed with longitudinal ridges and grooves alternately having longitudinal ridges and longitudinal grooves extending in the longitudinal direction,
The longitudinal groove shape is formed in a region overlapping the absorber in the crotch region in the thickness direction,
An absorbent article, wherein the non-skin-facing surface of the exterior sheet in the ventral region is formed with a width-direction ridge-groove shape having width-direction ridges and width-direction grooves alternately extending in the width direction. 2. The absorbent article of claim 1, wherein said longitudinal ridges extend from said ventral region to said dorsal region. The non-skin-facing surface of the exterior sheet in each of the ventral region and the dorsal region has a width-direction ridge-groove shape having width-direction ridges and width-direction grooves alternately extending in the width direction. Item 3. The absorbent article according to Item 1 or 2 . 4. The second exterior member according to any one of claims 1 to 3 , wherein a second exterior member is arranged on the non-skin facing side of the exterior sheet, and the width direction ridge groove shape is formed in the second exterior member. absorbent article. The width direction ridge groove shape in the ventral region is formed in a second exterior member arranged on the non-skin facing surface side of the exterior sheet,
4. The absorbent article according to claim 3 , wherein said widthwise ridges in said dorsal region are formed in said exterior sheet on which said second exterior member is not arranged. 6. The absorbent article according to claim 4 , wherein the second exterior member has a higher airflow resistance than the material forming the exterior sheet. 7. The absorbent article according to any one of claims 1 to 6 , wherein the cross-sectional area of the widthwise groove is larger than the cross-sectional area of the longitudinal groove. 8. The absorbent article according to any one of claims 1 to 7 , wherein the widthwise groove is formed by consolidating the material from which the widthwise groove is formed. a pair of ventral side flap portions each extending outward in the width direction of the absorbent body in the ventral region;
a pair of dorsal side flap portions extending outward in the width direction of the absorbent body in the dorsal region,
Each dorsal side flap portion is provided with a fastening tape,
A landing tape for fastening the fastening tape is arranged in the ventral region,
The ventral side flap portion and the dorsal side flap portion are formed so as to overlap each other when the absorbent article is worn,
9. The absorbent article according to any one of claims 1 to 8 , wherein a highly breathable region is present in a region where the abdominal side flap portion and the dorsal side flap portion overlap each other. An elastic member is arranged on each of the dorsal side flap portions,
10. The absorbent article according to claim 9 , wherein the elastic member and the high ventilation region overlap when the absorbent article is worn.

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