JP7257360B2 - absorbent article - Google Patents

Description

The present invention relates to absorbent articles comprising a topsheet comprising water absorbent fibers.

Patent Literature 1 discloses an absorbent article having cotton fibers as water absorbent fibers in the top sheet. A top sheet made of cotton fibers has the advantage of being able to achieve a soft touch like that of underwear. However, due to the high water absorbency of cotton fibers, there is a problem that stickiness tends to remain on the surface. Therefore, an absorbent article has been provided in which an auxiliary sheet is arranged on the non-skin surface side of a top sheet having cotton fibers to improve drawing of bodily fluids from the top sheet to the auxiliary sheet side (for example, Patent Document 1). reference).

JP 2019-162218 A

However, a topsheet having cotton fibers has a high diffusivity for bodily fluids, and when bodily fluids are discharged onto the topsheet, they may immediately spread in the planar direction. Body fluids tend to reach the outer edge of the top sheet, and there is a risk of side leakage. In particular, in a lying posture, body fluids tend to spread outward in the width direction and also to the rear side. That is, body fluid discharged from the excretion port tends to diffuse obliquely to the rear side. At this time, if the length in the width direction of the back region of the absorbent article is located inside the apex of the buttocks, there is a risk of leakage at the buttocks.

SUMMARY OF THE INVENTION The present invention has been made in view of such problems, and an object of the present invention is to suppress side leakage in the rear region of an absorbent article having water-absorbent fibers such as cotton fibers.

An absorbent article according to one aspect includes a front-rear direction and a width direction orthogonal to each other, a crotch region facing the vaginal opening of a wearer, a rear side region positioned behind the crotch region, and a crotch region. a front region located forward; absorbent cores disposed in the crotch region, the front region, and the rear region; a top sheet having water-absorbing fibers; and a top sheet disposed between the top sheet and the absorbent core and a liquid-impermeable back sheet disposed on the non-skin surface side of the absorbent core. The water absorbency of the top sheet is higher than that of the auxiliary sheet. The outer edge of the top sheet is located inside the outer edge of the auxiliary sheet in the width direction. The rear side region is provided with a hip flap that extends outward in the width direction from the outer edge of the auxiliary seat and bulges outward in the width direction. The non-skin surface of the hip flap is provided with a flap attaching portion for attaching the hip flap to a worn article.

FIG. 1 is a plan view of an absorbent article according to an embodiment viewed from the skin side. FIG. 2 is a plan view of the absorbent article according to the embodiment viewed from the non-skin surface side. 3 is a cross-sectional view taken along line AA shown in FIG. 1. FIG. FIG. 4 is a plan view of the absorbent core viewed from the skin surface side. FIG. 5 is a schematic enlarged view of the B portion shown in FIG.

(1) Overview of Embodiments At least the following matters will become clear from the description of this specification and the accompanying drawings.
An absorbent article according to one aspect includes a front-rear direction and a width direction orthogonal to each other, a crotch region facing the vaginal opening of a wearer, a rear side region positioned behind the crotch region, and a crotch region. a front region located forward; absorbent cores disposed in the crotch region, the front region, and the rear region; a top sheet having water-absorbing fibers; and a top sheet disposed between the top sheet and the absorbent core and a liquid-impermeable back sheet disposed on the non-skin surface side of the absorbent core. The water absorbency of the top sheet is higher than that of the auxiliary sheet. The outer edge of the top sheet is located inside the outer edge of the auxiliary sheet in the width direction. The rear side region is provided with a hip flap that extends outward in the width direction from the outer edge of the auxiliary seat and bulges outward in the width direction. The non-skin surface of the hip flap is provided with a flap attaching portion for attaching the hip flap to a worn article. According to this aspect, since the top sheet has water-absorbent fibers, the top sheet can quickly draw in bodily fluids and suppress liquid residue on the top sheet. It is possible to suppress lateral leakage due to leakage of bodily fluids, and improve touch feeling. Further, since the outer edge of the top sheet is positioned inward in the width direction from the outer edge of the auxiliary sheet, even if the body fluid spreads to the outer edge of the top sheet, the auxiliary sheet can retain the body fluid. At this time, since the water absorbency of the auxiliary sheet is lower than that of the top sheet, it is possible to prevent body fluid from diffusing excessively in the auxiliary sheet and leaking from the outer edge of the auxiliary sheet, thereby suppressing side leakage. Further, in the rear region, hip flaps are provided that extend outward in the width direction from the auxiliary seat. The hip flap is fastened to the wearing article via the flap fastening portion. Therefore, the hip flap follows the article to be worn even in a sleeping posture, etc., and tends to keep covering the body without twisting. Therefore, even if the body fluid spreads obliquely backward, the hip flap can hold the body fluid and suppress the back leakage.

According to a preferred aspect, the outer edge of the top sheet is located inside the outer edge of the absorbent core in the width direction. The outer edge of the auxiliary sheet is located outside the outer edge of the absorbent core in the width direction. According to this aspect, even if the body fluid spreads to the outer edge of the top sheet, the absorbent core extending outward in the width direction from the top sheet retains the body fluid, thereby suppressing side leakage. In addition, even if the body fluid spreads to the outer edge of the absorbent core, the auxiliary sheet can prevent the body fluid from seeping out and side leakage.

According to a preferred aspect, the absorbent article has at least a core compressed portion obtained by compressing the absorbent core in the thickness direction, and a pair of side sheets covering the outer side portions of the auxiliary sheet. The side sheet is joined to a side joint portion joined to the auxiliary sheet, and to a sheet extending inward in the width direction from the side joint portion and in contact with the non-skin surface of the side seat. There are side non-joints that are not connected. In the stretched state of the absorbent article, the side non-joint portion is arranged in a region that does not overlap with the core compressed portion. According to this aspect, the side sheet is not joined to the auxiliary sheet in the side unjoined portion, and the side sheet can stand up on the wearer's side. The side non-joint portion can further suppress body fluid leakage to the outside in the width direction. In addition, the absorbent article may be worn in a nearly stretched state, that is, in a state in which the non-joint side portions are not substantially erected. At this time, if the side non-joint portion overlaps the core compression portion, when the core compression portion is deformed in the wearing state, the side non-joint portion also constitutes the deformation base point, and the side non-joint portion stands up. In some cases, it is difficult to obtain the effect of preventing side leakage. However, since the side non-joint part does not overlap the core compression part in the extended state, the side non-joint part is not caught in the core compression part, and it is easy to achieve a standing state when worn, preventing side leakage due to the side non-joint part. Easy to get the effect.

According to a preferred aspect, the inner edges of the side sheets are located outside the outer edges of the top sheet in the width direction. The auxiliary sheet is exposed in a region between the side sheet and the top sheet. According to this aspect, body fluids that have diffused outward in the width direction from the outer edge of the top sheet can be drawn in by the auxiliary sheet. In addition, the side sheets are sometimes subjected to water-repellent treatment in order to suppress lateral leakage of bodily fluids. Since the sides of the top sheet are not covered by the side sheets and the auxiliary sheets are exposed, side leakage can be suppressed even if the side sheets are water-repellent.

According to a preferred embodiment, the top sheet is a laminated sheet comprising an upper layer mainly containing cotton fibers and a lower layer mainly containing heat-fusible fibers and positioned closer to the non-skin surface than the upper layer. be. In the top sheet, convex portions protruding toward the skin surface and concave portions protruding toward the non-skin surface extend in the front-rear direction and are provided alternately in the width direction. A fused portion in which the top sheet is fused to the auxiliary sheet is provided at least in a region overlapping with the recess. According to this aspect, body fluid can be diffused in the front-rear direction by the recesses and projections of the top sheet, the area of diffusion in the width direction can be suppressed, and side leakage can be suppressed. In addition, heat-fusible fibers forming the lower layer of the top sheet are fused to the auxiliary sheet, and body fluids can be drawn into the auxiliary sheet through the fused portion. Body fluids discharged onto the top sheet are drawn into the recesses projecting to the non-skin surface side, and drawn into the auxiliary sheet via the fused portions in the regions overlapping the recesses. Body fluids can be easily drawn to the non-skin surface side, and leakage along the top sheet can be suppressed, and the feel of the skin can be improved.

According to a preferred aspect, the average fiber length of the water absorbent fibers of the top sheet may be longer than the interval between the recesses. According to this aspect, the water-absorbent fiber can easily straddle the recesses, and can also guide the body fluid discharged to the region between the recesses to the recesses. In addition, since the recesses are fused to the auxiliary sheet, the water-absorbing fibers are less likely to float due to the fusion-bonding.

According to a preferred aspect, a top bonded portion where the top sheet is bonded to the auxiliary sheet via an adhesive, and a top non-bonded portion where the top sheet is not bonded to the auxiliary sheet via an adhesive. , is provided. The top non-bonded portion and the fused portion are provided in a region extending inward in the width direction from the outer edge of the top sheet. According to this aspect, since the adhesive is not applied to the region extending inward in the width direction from the outer edge of the top sheet, the adhesive does not hinder the drawing of bodily fluids to the non-skin surface side, and the top sheet. body fluids are easily drawn into the auxiliary sheet side at the outer side of the In addition, the region extending inward in the width direction from the outer edge of the top sheet is fused to the auxiliary sheet, so that bodily fluids can be drawn into the auxiliary sheet through the fused portion.

According to a preferred aspect, a plurality of the fused portions are arranged at intervals in the front-rear direction. According to this aspect, the water-absorbing fibers such as cotton fibers are more difficult to stretch than the heat-fusible fibers, and there is a risk that the fibers will break when forming the fused portion. However, since the fused portions are spaced apart from each other, the space between the fused portions serves as a cushioning region, and breakage of the water-absorbing fibers can be suppressed.

According to a preferred aspect, an auxiliary compressed portion is formed outside the outer edge of the top sheet in the width direction by compressing at least the auxiliary sheet in the thickness direction. The auxiliary pressing portion and the fusion-bonded portion are continuous in a plan view. According to this aspect, in the region where the top sheet and the auxiliary sheet overlap, the body fluid is drawn to the non-skin surface side through the fused portion, and the fused portion and the auxiliary pressing portion cross the top sheet outward in the width direction. It can guide body fluids over a wide area, including the Body fluids that have diffused outward in the width direction from the outer edge of the top sheet can be easily drawn toward the auxiliary sheet by the auxiliary pressing portion, and side leakage can be suppressed.

According to a preferred aspect, an auxiliary compressed portion is formed outside the outer edge of the top sheet in the width direction by compressing at least the auxiliary sheet in the thickness direction. The auxiliary pressing portion extends in the front-rear direction. According to this aspect, body fluids that have diffused outward in the width direction from the outer edge of the top sheet can be easily drawn into the auxiliary sheet by the auxiliary pressing portion. Then, the body fluid drawn into the auxiliary sheet can be diffused in the front-rear direction via the auxiliary compression portion, and the lateral leakage of the body fluid over the auxiliary sheet can be suppressed.

According to one preferred aspect, the absorbent core is provided with a low basis weight portion having a lower basis weight of absorbent material than its surroundings. The low basis weight portion has a front-rear low basis weight portion extending in the front-rear direction. The front and rear low basis weight portions are arranged at the center of the absorbent article in the width direction in the rear region. According to this aspect, the widthwise center of the rear side region is easily deformed into a convex shape via the front and rear low basis weight portions. Further, a deformation base point due to the outer edge of the top sheet is formed outside the deformation base point due to the front and rear low basis weight portions in the width direction. More specifically, the auxiliary sheet and the top sheet are arranged inside the outer edge of the top sheet in the width direction, and only the auxiliary sheet is arranged outside the outer edge of the top sheet in the width direction. . A deformation base point is created due to the difference in rigidity due to the presence or absence of the sheet. The front and rear low basis weight portions form convex portions on the inner side in the width direction of the outer edge of the top sheet, and the outer edge of the top sheet is recessed, so the area outside the top sheet covers the outer edge of the top sheet. It is easy to stand up as a deformation base point. Therefore, the absorbent article is deformed in a W shape in a cross-sectional view along the width direction, thereby improving the drawability of bodily fluids from the excretory opening and suppressing lateral leakage.

According to one preferred aspect, the absorbent core is provided with a low basis weight portion having a lower basis weight of absorbent material than its surroundings. The low basis weight portion has a width low basis weight portion extending in the width direction. The outer edge of the top sheet is located outside the outer edge of the width low basis weight portion in the width direction. According to this aspect, the absorbent article can be deformed along the roundness of the body extending in the front-rear direction through the width low basis weight portion. In addition, since the outer edge of the top sheet is located outside the outer edge of the width low basis weight portion in the width direction, even if the body fluid diffuses through the outer edge of the width low basis weight portion, the body fluid is absorbed by the top sheet. It can be held by and suppress side leakage.

According to one preferred aspect, the absorbent core is provided with a low basis weight portion having a lower basis weight of absorbent material than its surroundings. The low basis weight portion has a width low basis weight portion extending in the width direction. An exposed portion where the auxiliary sheet is exposed is provided outside the outer edge of the top sheet in the width direction. The width low basis weight portion is provided in a region overlapping with the exposed portion. According to this aspect, the exposed portion is provided with the width low basis weight portion without the top sheet. Therefore, the exposed portion is more easily deformed than the area where the top sheet is arranged (the area inside the exposed portion in the width direction). It is easy to deform along the roundness of the body extending in the front-rear direction with the width low basis weight portion as a base point, and lateral leakage can be suppressed. On the other hand, the area where the top sheet is arranged, where the top sheet and the auxiliary sheet are arranged, is less deformable than the exposed portion and easily deforms gently. The vaginal opening and the gluteal cleft extending rearward from the vaginal opening are located in the widthwise center of the wearer's crotch. The gently deformed portion can be applied to the delicate vaginal opening or the like, and discomfort of the wearer can be suppressed.

According to a preferred aspect, the absorbent article has at least a core compressed portion in which the absorbent core is compressed in the thickness direction. The core compressed portion includes a first compressed portion where the top sheet and the absorbent core are compressed together in a region overlapping with the top sheet, and a region where the auxiliary sheet extends outward in the width direction from the top sheet. and a second pressed portion in which the auxiliary sheet and the absorbent core are pressed together. The said 1st pressing part and the said 2nd pressing part continue in a row by planar view. According to this aspect, the first compressed portion where both the absorbent core and the top sheet are compressed and the second compressed portion where both the absorbent core and the auxiliary sheet are compressed are connected. The core compressed portion is formed in a region beyond the topsheet from the region overlapping the topsheet. Therefore, in the region overlapping with the top sheet, the body fluid discharged onto the top sheet can be drawn into the absorbent core, and the body fluid can be guided outward in the width direction over a wide range to the region beyond the top sheet. Body fluids that have diffused beyond the top sheet can be drawn into the non-skin surface side via the core compression portion, and lateral leakage of body fluids can be suppressed.

(2) Structure of Absorbent Article Hereinafter, an absorbent article according to an embodiment will be described with reference to the drawings. The absorbent article may be an absorbent article such as a sanitary napkin, pantiliner, light incontinence liner, breastfeeding pad, adult incontinence pad, fecal pad or sweat wipe. An absorbent article is an article that is attached to the inside of a wearable article such as a user's underwear. In addition, in the following description of the drawings, the same or similar reference numerals are given to the same or similar parts. However, it should be noted that the drawings are schematic and the ratio of each dimension may differ from the actual one. Therefore, specific dimensions and the like should be determined with reference to the following description. In addition, there are cases where portions having different dimensional relationships and ratios are included between the drawings.

FIG. 1 is a plan view of an absorbent article 1 according to an embodiment viewed from the skin side. Here, the "skin side" corresponds to the side facing the wearer's skin during use. "Non-skin side" corresponds to the side facing away from the wearer's skin during use. FIG. 2 is a plan view of the absorbent article 1 according to the embodiment viewed from the non-skin surface side. 3 is a cross-sectional view taken along line AA shown in FIG. 1. FIG. FIG. 4 is a plan view of the absorbent core viewed from the skin surface side.

The absorbent article 1 has a front-rear direction L and a width direction W. As shown in FIG. The front-rear direction L is a direction extending from the wearer's front side (abdominal side) to the rear side (dorsal side), or a direction extending from the wearer's back side to the front side. The width direction W is a direction perpendicular to the front-rear direction L. As shown in FIG. The absorbent article 1 has a thickness direction T extending from a wearer's skin side T1 and a non-skin side T2. The absorbent article 1 includes a front side region R1, a back side region R2, and a crotch region R3. The crotch region R3 is arranged across the center of the absorbent article in the front-rear direction L, and is arranged to face the wearer's vaginal opening. When the absorbent article 1 is worn in underwear, the crotch region R3 is located in the crotch portion of the underwear and is the region between the wearer's crotch, that is, the wearer's legs. The front side region R1 is positioned forward of the crotch region R3. A front edge of the front side region R1 defines a front edge of the absorbent article 1 . The rear side region R2 is located on the rear side of the crotch region R3. The rear edge of the rear region R2 defines the rear edge of the absorbent article 1. As shown in FIG.

A wing 3 may be provided in the crotch region R3. In addition, a hip flap 4 bulging outward in the width direction W may be provided in the rear region R2. The front edge of the wing 3 is defined by the root of the wing 3, and corresponds to the front portion of the two most recessed portions in the width direction W. A front edge of the wing 3 may define a boundary between the crotch region R3 and the front side region R1. The rear edge of the wing 3 is defined by the base of the wing 3, and corresponds to the rearward portion of the two portions that are most recessed inward in the width direction W. As shown in FIG. A rear edge of the wing 3 may define a boundary between the crotch region R3 and the rear side region R2. The hip flap 4 extends outward in the width direction W from the outer edge of the auxiliary seat, which will be described later, and bulges outward in the width direction W. As shown in FIG. The wings 3 are folded back to the non-skin side T2 of the worn article when worn, and the hip flaps 4 are not folded back to the non-skin side T2 of the worn article and are arranged along the inner surface of the worn article. Here, the outer portion in the present invention is a portion occupying a certain range in the width direction including the edge in the width direction W, and the outer edge is the edge in the width direction. Further, the outer edge in the present invention is an edge positioned outside in the front-rear direction L, and the inner edge is an edge positioned inside in the front-rear direction.

The absorbent article 1 comprises an absorbent core 31 that absorbs bodily fluids, a top sheet 11 that is arranged closer to the skin surface side T1 than the absorbent core 31 and has water-absorbent fibers, and is arranged between the absorbent core 31 and the top sheet 11. and a liquid-impermeable back sheet 20 disposed on the non-skin surface side T2 of the absorbent core 31. The topsheet 11 is oriented against the wearer's skin and the backsheet 20 is oriented away from the wearer's skin.

The top sheet 11 is a sheet that contacts the wearer's skin, and may cover the central portion of the absorbent core 31 in the width direction W. The top sheet 11 may extend in the front-rear direction L from the front region R1 to the rear region R2. The topsheet 11 has water absorbent fibers. The top sheet 11 is mainly composed of water-absorbent fibers such as cotton fibers and rayon fibers (hydrophobic fibers coated with a hydrophilic oil agent are hydrophilic fibers, but non-water-absorbent fibers are excluded). The term "mainly" as used herein means that the fiber ratio of water-absorbent fibers in the fibers of the top sheet 11 is 50% or more. According to the top sheet 11, it is possible to improve the migration of sweat from the skin to the top sheet and the feeling of wearing in a well-balanced manner. More preferably, the topsheet 11 may consist substantially only of water-absorbing fibers. The top sheet 11 substantially composed of only water-absorbent fibers may contain thermoplastic resin fibers and binder fibers at a fiber ratio of less than 10%. According to the top sheet 11, the transferability of sweat from the skin to the top sheet and the feeling of wearing can be further improved. In another form, the topsheet 11 may be 100% cotton fibers. The top sheet 11 can be exemplified by a cotton nonwoven fabric, and the fiber length of cotton fibers may be 5 to 35 mm. The length in the width direction W of the top sheet 11 may be less than 55 mm. 55 mm is the width of the average female perineum plus 10 mm. The top sheet 11 that achieves a soft touch touches the perineum and improves the feeling of wearing.

As used herein, the term "water absorbent" can be easily understood by those skilled in the art, for example, pulp is water absorbent. Likewise, it can be readily appreciated that thermoplastic fibers are non-absorbent. Absorbent fibers refer to fibers containing cellulose or derivatives thereof, such as cellulose contained in cotton, rayon, etc., or viscose. The moisture content of the absorbent fibers is preferably 6% or more, more preferably 10% or more. Non-absorbent fibers, on the other hand, preferably have such a moisture content of less than 6%, more preferably less than 4%. The water absorption can be evaluated by the moisture content. The higher the moisture content, the higher the water absorption, and the lower the moisture content, the lower the water absorption.

A method for measuring the moisture content will be described below. The moisture content was calculated according to the moisture content test method of JIS P8203. That is, after leaving the fiber sample (sheet to be measured for moisture content) in a test room at a temperature of 40 ° C. and a relative humidity of 80% RH for 24 hours, the weight W (g) of the fiber sample before absolute drying treatment in the room was measured. After that, the fiber sample was completely dried by allowing it to stand for 1 hour in an electric dryer (manufactured by Isuzu Manufacturing Co., Ltd.) at a temperature of 105±2°C. After the absolute dry treatment, in a standard test room at a temperature of 20 ± 2 ° C. and a relative temperature of 65 ± 2%, Si silica gel (for example, (manufactured by Toyoda Kako Co., Ltd.) is placed in a glass desiccator (for example, manufactured by Techjam Co., Ltd.) and allowed to stand until the temperature of the fiber sample reaches 20±2°C. After that, the constant weight W' (g) of the fiber sample is weighed, and the moisture content of the fiber sample is obtained by the following formula.
Moisture content (%) = (WW'/W') x 100

When obtaining a fiber sample from the absorbent article, two sheets for comparison are taken out under the same conditions. Specifically, when comparing the water absorbency of the top sheet and the water absorbency of the auxiliary sheet, both the top sheet and the auxiliary sheet are cut out in areas where no embossing is formed. When the top sheet and the auxiliary sheet are not bonded by an adhesive, after cutting, the top sheet and the auxiliary sheet are separated to obtain the fiber sample. In addition, when the top sheet and the auxiliary sheet are joined with an adhesive, the adhesive is dissolved using toluene, and the adhesive is kept under standard conditions (temperature 23±2° C., relative humidity 50±5%) for 24 hours. Use dried. The fiber samples obtained in this manner are sized 100 mm×100 mm in single or multiple sheets. If a fiber sample with dimensions of 100 mm x 100 mm cannot be obtained from one absorbent article, fiber samples cut out from the absorbent article taken out of the package packed in the same packing material (cardboard) may be combined. . It may also be measured at 80 mm x 125 mm or 50 mm x 200 mm if it is difficult to collect the above dimensions. Let the moisture content (%) be the average value of n=10.

The auxiliary sheet 13 may contain heat-fusible fibers. The water absorbency of the top sheet 11 is higher than that of the auxiliary sheet 13 . The outer edge 11E of the top sheet 11 is located inside the outer edge 13E of the auxiliary sheet 13 in the width direction W. As shown in FIG. Therefore, the auxiliary sheet 13 extends outward in the width direction W from the top sheet 11 . The absorbent article 1 may have a pair of side sheets 12 . A pair of side sheets 12 are provided on both sides of the center of the absorbent article 1 in the width direction W so as to cover the outer side of the auxiliary sheet 13 . The side seat 12 may extend outward in the width direction W relative to the auxiliary seat 13 . The water absorbency of the side sheets 12 is lower than that of the top sheet 11 and lower than that of the auxiliary sheet 13 . The side sheet 12 may have a folded portion that is folded back toward the non-skin surface side T2 at the inner edge 12I of the side sheet 12 . As shown in FIG. 3 , a side joint portion 43 where the side sheet 12 is joined to the auxiliary sheet 13 and a side joint portion 43 extending inward in the width direction W from the side joint portion 43 , and the side sheet 12 is a non-surface portion of the side sheet 12 . A side non-bonded portion 44 that is not bonded to the sheet that contacts the surface may be provided. The side joint portion 43 may be a portion where the folded portion forming the non-skin surface of the side sheet 12 is joined to the skin surface of the auxiliary sheet 13 . The side joint portion 43 may be spaced apart from the inner edge 12I of the side seat 12 and may be arranged outside in the width direction W of the inner edge 12I. The side joint portion 43 may be a portion where the side sheet 12 is joined to the auxiliary sheet 13 with an adhesive such as a hot-melt adhesive, or the side sheet 12 is joined to the auxiliary sheet 13 by thermal welding, ultrasonic welding, or the like. It may be a portion that is fused to. The side non-joint portion 44 is provided at the inner edge 12I of the side seat 12 and extends outward in the width direction W from the inner edge 12I. As shown in FIG. 5, the absorbent article 1 may be formed with an auxiliary compressed portion 15 formed by compressing at least the auxiliary sheet 13 in the thickness direction T. As shown in FIG. The auxiliary pressing part 15 may compress at least the auxiliary sheet 13 in a region that does not overlap with the top sheet 11 , and the side sheets 12 may be compressed together with the auxiliary sheet 13 . may be compressed. For convenience of explanation, FIGS. 1 and 3 omit the auxiliary pressing unit 15 .

The backsheet 20 is a liquid-impermeable sheet. The back sheet 20 may be a polyethylene sheet, a laminated nonwoven fabric mainly composed of polypropylene or the like, an air permeable resin film, a sheet in which an air permeable resin film is bonded to a nonwoven fabric such as spunbond or spunlace. The non-skin surface of the backsheet 20 may be provided with a fastening portion 70 for fastening the absorbent article 1 to a worn article (such as underwear). The fastening portion 70 may be a portion to which an adhesive such as a hot-melt adhesive is applied, or a portion to which an engaging member such as a mechanical fastener is provided. The fastening portion 70 includes a body fastening portion 71 arranged in a region overlapping the absorbent core 31, a wing fastening portion 73 provided on the wing 3, a flap fastening portion 74 provided on the hip flap 4, may have The fastening portion 70 may be covered with a packaging sheet or a release sheet for individually wrapping the absorbent article 1 before use of the absorbent article 1 .

The absorbent core 31 is arranged in the crotch region R3, the front region R1, and the rear region R2, and provided between the auxiliary sheet 13 and the back sheet 20. As shown in FIG. The absorbent core 31 comprises an absorbent material that absorbs liquids. The absorbent core 31 may be wrapped with a core wrap 32 as shown in FIG. The core wrap 32 can be composed of, for example, a nonwoven fabric or a tissue sheet. The absorbent material that makes up the absorbent core 31 can be formed from, for example, pulp and superabsorbent polymers (SAP).

As shown in FIG. 4, the absorbent core 31 includes a high basis weight portion 25 in which the basis weight of the absorbent material is higher than the surroundings and a low basis weight portion (including slits) 26 in which the basis weight of the absorbent material is lower than the surroundings. and may be provided. More specifically, a high basis weight portion 25 is provided at the center of the absorbent core 31 in the front-rear direction L. As shown in FIG. The high basis weight part 25 straddles the crotch region R3 and the rear region R2, and straddles the center of the absorbent core 31 in the width direction W. The basis weight of the absorbent material of the high basis weight portion 25 is 600 g/m ² . The low basis weight portion 26 has a front-rear low basis weight portion extending in the front-rear direction L and a width low basis weight portion extending in the width direction W. The front and rear low basis weight portion has a first front and rear low basis weight portion 261 arranged in the front region R1 and a second front and rear low basis weight portion 262 arranged in the rear region R2. The width low basis weight portion has a first width low basis weight portion 263 and a second width low basis weight portion 264 arranged in the rear region R2. The first width low basis weight portion 263 extends in the width direction W from the outer edge 31E of the absorbent core 31 toward the inside in the width direction W in the rear region R2. The first width low basis weight portions 263 are arranged as a pair, spaced apart from each other in the left and right direction. The second width low basis weight portion 264 is arranged on the rear side of the first width low basis weight portion 263 . The second width low basis weight portion 264 continues to the rear end edges of the second front and rear low basis weight portions 262 . The first front and rear low basis weight part 261 , the second front and rear low basis weight part 262 and the second width low basis weight part 264 straddle the center of the absorbent core 31 in the width direction W. Each low basis weight portion 26 and each high basis weight portion 25 are separated from each other in plan view. The basis weight of the absorbent material in the low basis weight portion 26 is 100 g/m ² . The basis weight of the absorbent core 31 other than the low basis weight portion 26 and the high basis weight portion 25 is 300 g/m ² . The absorbent article 1 may have at least a core compressed portion 35 in which the absorbent core 31 is compressed in the thickness direction T. As shown in FIG. The core pressing portion 35 may be formed by compressing at least the absorbent core 31 , and the absorbent core 31 , the auxiliary sheet 13 and the top sheet 11 may all be compressed in the thickness direction T. The auxiliary sheet 13 may be compressed in the thickness direction T together. The core pressing portion 35 may be formed integrally with the auxiliary pressing portion 15, or may be formed integrally with the fusion bonding portion 19, which will be described later.

Here, the measurement of the "basis weight of the absorbent core" in this specification can be measured by the following method. In the case where multiple absorbent articles are contained in a package, remove 5 absorbent articles from the same package and place them in an atmosphere of 20°C ± 2°C and relative humidity 60% ± 5% RH. Use a sample that has been left for 12 hours. For absorbent articles wrapped in individual wrapping sheets, etc., the package is opened, the folded absorbent article is unfolded, the portion whose basis weight is to be measured is cut out from the absorbent article, and the weight of the cut-out portion is measured. do. Next, the absorbent core is removed from the cut portion, and the weight of the top sheet, back sheet, etc. other than the absorbent core is measured. In addition, when the absorbent core remains with an adhesive or the like, it is completely removed with toluene or the like, and the measurement is performed after drying at room temperature for 24 hours. The basis weight is calculated based on the area of the part whose basis weight is to be measured by removing the weight of the portion other than the absorbent core from the weight of the cut out portion. If there are multiple areas for measuring the basis weight of the absorbent core, and the multiple areas are covered with the same sheet (top sheet, core wrap, etc.), the sheets are considered to have the same basis weight. Therefore, the basis weight of the absorbent core may be measured without peeling off the sheet after cutting out the portion to be measured for basis weight from the absorbent article.

The absorbent article 1 according to the present embodiment is configured to be able to suppress lateral leakage in the rear side region R2 while improving touch feeling with the water absorbent fibers. Next, a detailed description will be given of a configuration that achieves both improved feel and suppression of side leakage. Since the top sheet 11 has water-absorbing fibers, the top sheet 11 can quickly draw in body fluids, and can suppress liquid residue on the top sheet 11 . It is possible to suppress lateral leakage due to leakage of bodily fluids, and improve touch feeling. Further, the outer edge 11E of the top sheet 11 is located inside the outer edge 13E of the auxiliary sheet 13 in the width direction W. As shown in FIG. Therefore, even if the body fluid spreads to the outer edge 11</b>E of the top sheet 11 , the auxiliary sheet 13 can retain the body fluid. At this time, since the water absorbency of the auxiliary sheet 13 is lower than the water absorbency of the top sheet 11, the body fluid is prevented from diffusing excessively in the auxiliary sheet 13 and leaking from the outer edge 13E of the auxiliary sheet 13, thereby preventing side leakage. can be suppressed. Further, in the rear region R2, a hip flap 4 extending outward in the width direction W from the auxiliary seat 13 is provided. The hip flap 4 is fastened to the wearing article via the flap fastening portion 74 . Therefore, the hip flaps 4 follow the article to be worn even in a sleeping posture, etc., and easily continue to cover the body without twisting. Therefore, even if the bodily fluid spreads obliquely backward, the hip flap 4 can hold the bodily fluid and suppress the back leakage. Also, the hip flap 4 may have a reinforcing sheet. The hip flap 4 is even less likely to get twisted, and can continue to cover the body while following the article to be worn.

The outer edge 11E of the top sheet 11 may be located inside the outer edge 31E of the absorbent core 31 in the width direction W. Further, the outer edge 13E of the auxiliary sheet 13 may be positioned outside the outer edge 31E of the absorbent core 31 in the width direction W. According to this configuration, even if the body fluid spreads to the outer edge 11E of the top sheet 11, the absorbent core 31 extending outward in the width direction W from the top sheet 11 retains the body fluid and suppresses side leakage. . In addition, even if the body fluid spreads to the outer edge 31E of the absorbent core 31, the auxiliary sheet 13 can prevent the body fluid from seeping out and side leakage.

In the stretched state of the absorbent article, the side non-joint portion 44 may be arranged in a region that does not overlap the core compressed portion 35 . The stretched state is a state in which the absorbent article is stretched to the point where no wrinkles are formed. The core compressing portion 35 of the present embodiment is arranged in a region that does not overlap with the side sheet 12 and is arranged only inside the side sheet 12 in the width direction W. As shown in FIG. In the side non-joint portion 44, the side sheet 12 is not joined to the auxiliary sheet 13, and can stand up on the wearer's side. Leakage of bodily fluids to the outside in the width direction W can be further suppressed by the side non-joint portions 44 . In addition, the absorbent article 1 may be worn in a state close to being stretched, that is, in a state in which the side non-bonded portions 44 are not substantially erected. At this time, if the side non-joint portion 44 overlaps the core compression portion 35, when the core compression portion 35 is deformed in the wearing state, the side non-joint portion 44 also constitutes a deformation base point. It may be difficult for the portion 44 to stand up, and it may be difficult to obtain the effect of preventing side leakage. However, since the side non-joint portion 44 does not overlap the core compression portion 35 in the stretched state, the side non-joint portion 44 is not caught in the core compression portion 35, and the side non-joint portion 44 tends to stand up when worn. It is easy to obtain the effect of preventing side leakage due to

The core pressing parts 35 may not be continuous in the front-rear direction L, but may be arranged at intervals. A region between the core compressing portions 35 in the front-rear direction L constitutes a non-compressing region in which the core compressing portions 35 are not provided. The non-squeezed area may be provided between the rear edge of the wing 3 and the maximum width position located on the outermost side in the width direction W of the hip flap 4 as well. The rear edge of the wing 3 is arranged in the vicinity of the perineum, and the maximum width position of the hip flap 4 is arranged at the apex of the swelling of the buttocks. The area from the vicinity of the perineum to the apex of the swelling of the buttocks is a region where the body is likely to be undulated, but the non-compressed region is flexibly deformed and can maintain fit to the body. Further, a core pressing portion 35 extending in the width direction W may be provided in the rear region R2. The core compression portion 35 extending in the width direction W can suppress the diffusion of body fluids to the rear edge of the absorbent article, thereby suppressing the rear leakage.

As shown in FIG. 1 , the core pressing portion 35 includes a first pressing portion R31 in which the top sheet 11 and the absorbent core 31 are both pressed in a region overlapping the top sheet 11, and a first pressing portion R31 in which the auxiliary sheet 13 is wider than the top sheet 11 in the width direction. It may have a second pressed portion R32 in which the auxiliary sheet 13 and the absorbent core 31 are pressed together in the region extending outward of W. The first compressed portion R31 and the second compressed portion R32 may be continuous in plan view. In addition, the form in which the first compressed part R31 and the second compressed part R32 are connected is not only the form in which they are adjacent to each other (the form in physical contact), but also the form in which they are separated from each other but adjacent to each other (predetermined (for example, 5 mm or less) and not physically in contact with each other). According to this aspect, the first compressed portion R31 in which both the absorbent core 31 and the top sheet 11 are compressed and the second compressed portion R32 in which both the absorbent core 31 and the auxiliary sheet 13 are compressed are connected. The core compressed portion 35 is formed in a region beyond the top sheet 11 from the region overlapping the top sheet 11 . Therefore, in the region overlapping with the top sheet 11, the body fluid discharged onto the top sheet 11 is drawn into the absorbent core 31, and the body fluid is guided outward in the width direction W to the region beyond the top sheet 11 in a wide range. be able to. Body fluids that have diffused beyond the top sheet 11 can be drawn into the non-skin surface side via the core compression portion 35, and lateral leakage of the body fluids can be suppressed.

The inner edge 12I of the side sheet 12 may be positioned outside in the width direction W of the outer edge 11E of the top sheet 11 . That is, the side sheet 12 and the top sheet 11 may be spaced apart in the width direction W. In the area between the side sheet 12 and the top sheet 11, the auxiliary sheet 13 is exposed. That is, the auxiliary sheet 13 constitutes the surface of the absorbent article 1 in the area between the side sheet 12 and the top sheet 11 . The auxiliary sheet 13 can draw in body fluids that have diffused outward in the width direction W from the outer edge 11</b>E of the top sheet 11 . In addition, the side sheet 12 may be subjected to a water-repellent treatment in order to suppress lateral leakage of bodily fluids. Since the sides of the top sheet 11 are not covered by the side sheets 12 and the auxiliary sheets 13 are exposed, even if the side sheets 12 are water-repellent, side leakage can be suppressed.

FIG. 5 is a schematic enlarged view of the B portion shown in FIG. The top sheet 11 may have a two-layer structure. More specifically, the top sheet 11 includes an upper layer 11A that mainly contains cotton fibers (more than 50%), and cotton fibers and heat-fusible fibers (hydrophobic fibers coated with a hydrophilic oil). and a lower layer 11B mixed with non-absorbent fibers). The top sheet 11 may be provided with protrusions 17 protruding to the skin side T1 and recesses 18 protruding to the non-skin side T2. The boundary between the protrusions 17 and the recesses 18 can be midway in the thickness direction T between the peak 17P on the skin surface of the top sheet 11 and the bottom point 18P on the skin surface of the top sheet 11 . The protrusions 17 and the recesses 18 may extend in the front-rear direction L and be alternately provided in the width direction. The convex portion 17 and the concave portion 18 may be provided integrally with the upper layer 11A and the lower layer 11B. The concave portions 18 and convex portions 17 of the top sheet 11 diffuse the body fluid in the front-rear direction L, suppress the area over which the body fluid spreads in the width direction W, and suppress lateral leakage.

A fused portion 19 is formed in which the top sheet 11 is fused to the auxiliary sheet 13 . The fusion-bonded portion 19 is provided in a region that overlaps at least the recessed portion 18 . The fused portion 19 can be formed by embossing or welding (heat welding, ultrasonic welding, etc.), and is formed by fusing the heat-fusible fibers contained in the lower layer 11B. In addition, the heat-fusible fibers forming the lower layer 11B of the top sheet 11 are fused to the auxiliary sheet 13, so that bodily fluids can be drawn into the auxiliary sheet 13 through the fused portions 19. FIG. The bodily fluids discharged onto the top sheet 11 are drawn into the recesses 18 projecting to the non-skin side T2, and drawn into the auxiliary sheet 13 via the fused portions 19 in the regions overlapping the recesses 18. As shown in FIG. Bodily fluids can be easily drawn into the non-skin surface side T2, and leakage along the top sheet 11 can be suppressed, and the touch can be improved. The convex portions 17, the concave portions 18 and the fused portions 19 of the present embodiment are formed by embossing the top sheet 11 and the auxiliary sheet 13 in a laminated state. Therefore, the convex portion 17 and the concave portion 18 are formed in both the upper layer 11A and the lower layer 11B. The auxiliary sheet 13 has an auxiliary convex portion that protrudes in the thickness direction (non-skin side T2) in the region overlapping with the convex portion 17, and has an auxiliary convex portion that protrudes in the thickness direction (skin side T1) in the region overlapping with the concave portion 18. is formed with an auxiliary concave portion that is recessed into the The fused portions 19 are spaced apart in the front-rear direction L in the region where the recess 18 and the auxiliary recess overlap. In addition, as shown in FIG. 5, auxiliary convex portions and auxiliary concave portions are formed in areas of the auxiliary sheet 13 where the top sheet 11 does not overlap (areas extending outward in the width direction W from the outer edge 11E of the top sheet 11). It doesn't have to be.

The average fiber length of the water absorbent fibers of the top sheet 11 may be longer than the interval G18 between the recesses 18 . The interval G18 between the concave portions 18 is the interval between adjacent concave portions 18 in the width direction W, and is the length in the width direction W of one convex portion 17 . The water-absorbing fibers easily straddle the recesses 18 and can guide the body fluid discharged to the area between the recesses 18 to the recesses 18 . In addition, since the top sheet 11 is fused to the auxiliary sheet 13 in the concave portions 18, the water-absorbing fibers are less likely to be lifted by the fusion-bonding. In addition, the average fiber length of the fiber is measured individually on a glass plate with a scale, "A7.1.1 A method (standard method)" in "A7.1 Measurement of fiber length" in Annex A of JIS L 1015: 2010. It can be measured according to "Method for measuring fiber length". The above method is a test method corresponding to ISO 6989 issued in 1981.

As shown in FIG. 3, the non-skin surface of the top sheet 11 is coated with an adhesive HMA. A top joint portion 41 where the top sheet 11 is joined to the auxiliary sheet 13 with an adhesive and a top non-joint portion 42 where the top sheet 11 is not joined to the auxiliary sheet 13 with an adhesive are provided. . The top joint portion 41 is a region where the non-skin surface of the top sheet 11 and the auxiliary sheet 13 are adhered. The top joint portions 41 may extend in the front-rear direction L and be spaced apart in the width direction W. As shown in FIG. In the region extending inward in the width direction W from the outer edge 11E of the top sheet 11, there are a top unbonded portion 42 and a fused portion 19 (see FIG. 5) where the top sheet 11 is fused to the auxiliary sheet 13. may be provided. Since the adhesive HMA is not attached to the region extending inward in the width direction W from the outer edge 11E of the top sheet 11, the adhesive does not hinder the drawing of bodily fluids to the non-skin side T2. Body fluids can be transferred to the auxiliary sheet 13 side in the outer portion. In addition, the top sheet 11 is fused to the auxiliary sheet 13 in a region extending inward in the width direction W from the outer edge 11E of the top sheet 11, and body fluids are drawn into the auxiliary sheet 13 through the fused portion 19. be able to.

A plurality of fused portions 19 may be arranged at intervals in the front-rear direction L. As shown in FIG. Water-absorbent fibers such as cotton fibers are more difficult to stretch than heat-fusible fibers, and there is a risk that the fibers will break when the fused portion 19 is formed. However, since the fused portions 19 are arranged at intervals, the space between the fused portions 19 serves as a buffer region, and breakage of the water-absorbing fibers can be suppressed. 1 and 3, the fused portion 19 is omitted for convenience of explanation.

Auxiliary pressing portions 15 may be formed outside the outer edge 11</b>E of the top sheet 11 in the width direction W. The auxiliary pressing part 15 may extend in the front-rear direction L. The configuration in which the auxiliary pressing portions 15 extend in the front-rear direction L includes not only a linear configuration extending in the front-rear direction L, but also a configuration in which a plurality of auxiliary pressing portions 15 are arranged side by side in the front-rear direction L. The auxiliary pressing parts 15 of the present embodiment are dot-shaped, and are arranged in plurality in the front-rear direction L at intervals. According to this aspect, body fluids that have diffused outward in the width direction W from the outer edge 11</b>E of the top sheet 11 are easily drawn into the auxiliary sheet 13 by the auxiliary pressing portions 15 . Then, the body fluid drawn into the auxiliary sheet 13 can be diffused in the front-rear direction L via the auxiliary pressing portion 15, and lateral leakage of the body fluid over the auxiliary sheet 13 can be suppressed. Preferably, the auxiliary pressing part 15 may be arranged in the entire front-rear direction L of the region extending outward in the width direction from the outer edge of the absorbent core 31 . Body fluids diffusing from the outer edge of the absorbent core 31 can be drawn in by the auxiliary compressing portion 15 to suppress lateral leakage. The auxiliary compressed portion 15 may be formed together with the fused portion 19 . More specifically, the top sheet 11 and the auxiliary sheet 13 are compressed in the thickness direction while the top sheet 11 and the auxiliary sheet 13 are overlapped. The fused portion 19 may be formed in the region where the top sheet 11 and the auxiliary sheet 13 are laminated, and the auxiliary pressing portion 15 may be formed in the region where only the auxiliary sheet 13 is arranged.

The auxiliary pressing portion 15 and the fusion-bonded portion 19 may be continuous in plan view. For example, in a state where the top sheet 11 and the auxiliary sheet 13 are overlapped, the top sheet 11 and the auxiliary sheet 13 are compressed in the thickness direction T, and the area where the top sheet 11 and the auxiliary sheet 13 are overlapped and the auxiliary sheet 13 are compressed. embossed across the region extending outward in the width direction W from the top sheet 11. - 特許庁As a result, the auxiliary compressed portion 15 and the fusion-bonded portion 19 are formed to be continuous in plan view. In addition, the configuration in which the auxiliary pressing portion 15 and the fusion bonding portion 19 are connected is not limited to the configuration in which they are adjacent to each other (the configuration in which they are physically in contact), but also the configuration in which they are separated from each other but adjacent to each other (a predetermined interval). (e.g., 5 mm or less) arranged side by side and not in physical contact with each other). According to this configuration, in the region where the top sheet 11 and the auxiliary sheet 13 overlap, bodily fluids are drawn to the non-skin surface side through the fused portions 19, and are drawn outward in the width direction W by the fused portions 19 and the auxiliary pressing portions 15. Body fluids can be led over a wide range to the area beyond the top sheet 11. - 特許庁Body fluids that have diffused outward in the width direction W from the outer edge 11E of the top sheet 11 can be easily drawn toward the auxiliary sheet 13 by the auxiliary pressing portions 15, and lateral leakage can be suppressed.

The front and rear low basis weight portions are arranged at the center in the width direction W of the absorbent article 1 in the rear side region R2. In the present embodiment, the second front and rear low basis weight portions 262 are arranged at the center of the absorbent article 1 in the width direction W in the rear region R2. According to this aspect, the center of the rear region R2 in the width direction W is easily deformed into a convex shape via the second front and rear low basis weight portions 262 . Further, a deformation base point by the outer edge 11</b>E of the top sheet 11 is formed outside the deformation base point by the second front and rear low basis weight portions 262 in the width direction. More specifically, the auxiliary sheet 13 and the top sheet 11 are arranged inside the outer edge 11E of the top sheet 11 in the width direction W, and outside the outer edge 11E of the top sheet 11 in the width direction W, Only the auxiliary seat 13 is arranged. A deformation base point is created due to the difference in rigidity due to the presence or absence of the sheet. A convex portion formed by the second front and rear low basis weight portions 262 is formed inside the outer edge of the top sheet 11 in the width direction W, and the outer edge 11E of the top sheet 11 is recessed. The area tends to rise with the outer edge 11E of the top sheet 11 as a deformation base point. Therefore, the absorbent article is deformed into a W-shape in a cross-sectional view along the width direction W, thereby improving the drawability of bodily fluids from the excretory opening and suppressing lateral leakage.

The outer edge 11E of the top sheet 11 may be positioned outside in the width direction W of the outer edge of the width low basis weight portion. In the present embodiment, the outer edge of the second width low basis weight portion 264 is positioned inside in the width direction W of the outer edge 11E of the top sheet 11 . A deformation base point extending in the width direction W is formed by the second width low basis weight portion 264, and the absorbent article is deformed along the roundness of the body extending in the front-rear direction L via the second width low basis weight portion 264. can be done. In addition, since the outer edge 11E of the top sheet 11 is located outside the outer edge of the second width low basis weight portion 264 in the width direction W, body fluids diffuse through the outer edge of the second width low basis weight portion 264. However, the body fluid can be retained by the top sheet 11 and lateral leakage can be suppressed.

The width low basis weight part may be provided in a region overlapping with the exposed part where the auxiliary sheet 13 is exposed. The exposed portion is located outside the outer edge 11E of the top sheet 11 in the width direction W and is a portion where the auxiliary sheet 13 is exposed on the skin surface side of the absorbent article 1 . The exposed portion is provided between the outer edge 11E of the top sheet 11 and the inner edge 12I of the side sheet 12 . In the present embodiment, the first width low basis weight portion 263 is provided in a region overlapping with the exposed portion. In the exposed portion, the top sheet 11 and the side sheet 12 are not arranged, and the first width low basis weight portion 263 is provided. Therefore, the exposed portion is wider than the region where the top sheet 11 is arranged (the region inside the exposed portion in the width direction W) and the region where the side sheet 12 is arranged (the region outside the exposed portion in the width direction W). is also easily deformed. It is easy to deform along the roundness of the body extending in the front-rear direction L with the first width low basis weight portion 263 as a base point, and lateral leakage can be suppressed. On the other hand, the region where the top sheet 11 is arranged, where the top sheet 11 and the auxiliary sheet 13 are arranged, is less deformable than the exposed portion and is more likely to deform smoothly. The vaginal opening and the gluteal cleft extending rearward from the vaginal opening are positioned at the center of the wearer's crotch in the width direction W. The gently deformed portion can be applied to the delicate vaginal opening or the like, and discomfort of the wearer can be suppressed.

Although the present invention has been described in detail using the above embodiments, it will be apparent to those skilled in the art that the present invention is not limited to the embodiments described herein. The present invention can be implemented with modifications and variations without departing from the spirit and scope of the invention defined by the claims. Accordingly, the descriptions herein are for the purpose of illustration and description, and are not intended to have any limiting meaning with respect to the present invention.

1: Absorbent article 11 : Top sheet 11E : Outer edge 11A of top sheet : Upper layer 11B : Lower layer 12 : Side sheet 12I : Inner edge 13 of side sheet : Auxiliary sheet 13E : Outer edge 15 of auxiliary sheet : Auxiliary pressing part 17 : Convex portion 18 : Concave portion 19 : Fusion-bonded portion 20 : Back sheet 31 : Absorbent core 31E : Outer edge 41 of absorbent core : Top joint portion 42 : Top non-joint portion 43 : Side joint portion 44 : Side non-joint portion R1 : Front side region R2: Rear side region R3: Inseam region L: Front-back direction T: Thickness direction T1: Skin side T2: Non-skin side W: Width direction

Claims (13)

a front-rear direction and a width direction perpendicular to each other;
a crotch region facing the wearer's vaginal opening;
a rear side region located behind the crotch region;
a front region located forward of the crotch region;
an absorbent core disposed in the crotch region, the front region, and the rear region;
a top sheet having absorbent fibers;
an auxiliary sheet disposed between the top sheet and the absorbent core;
An absorbent article comprising a liquid-impermeable back sheet disposed on the non-skin side of the absorbent core,
The water absorbency of the top sheet is higher than the water absorbency of the auxiliary sheet,
the outer edge of the top sheet is located inside the outer edge of the auxiliary sheet in the width direction;
The rear side region is provided with a hip flap that extends outward in the width direction from the outer edge of the auxiliary seat and bulges outward in the width direction,
The non-skin surface of the hip flap is provided with a flap fastening portion for fastening the hip flap to a worn article,
a top bonded portion where the top sheet is bonded to the auxiliary sheet via an adhesive; a top non-bonded portion where the top sheet is not bonded to the auxiliary sheet via the adhesive; A fused portion fused to the auxiliary sheet is provided,
In a region extending inward in the width direction from the outer edge of the top sheet, the top non-bonded portion is provided extending in the front-rear direction, and the fused portions are provided at intervals in the front-rear direction. Absorbent article. a front-rear direction and a width direction perpendicular to each other;
a crotch region facing the wearer's vaginal opening;
a rear side region located behind the crotch region;
a front region located forward of the crotch region;
an absorbent core disposed in the crotch region, the front region, and the rear region;
a top sheet having absorbent fibers;
an auxiliary sheet disposed between the top sheet and the absorbent core;
An absorbent article comprising a liquid-impermeable back sheet disposed on the non-skin side of the absorbent core,
The water absorbency of the top sheet is higher than the water absorbency of the auxiliary sheet,
the outer edge of the top sheet is located inside the outer edge of the auxiliary sheet in the width direction;
The rear side region is provided with a hip flap that extends outward in the width direction from the outer edge of the auxiliary seat and bulges outward in the width direction,
The non-skin surface of the hip flap is provided with a flap fastening portion for fastening the hip flap to a worn article,
The absorbent article has at least a core compression portion that compresses the absorbent core in the thickness direction, and a pair of side sheets that cover the outer side of the auxiliary sheet,
In the stretched state of the absorbent article, the inner edges of the side sheets are located outside the outer edges of the top sheet in the width direction, and the area between the side sheets and the top sheet is the auxiliary sheet. An absorbent article in which is exposed. the outer edge of the top sheet is located inside the outer edge of the absorbent core in the width direction,
3. The absorbent article according to claim 1, wherein the outer edge of said auxiliary sheet is located outside the outer edge of said absorbent core in said width direction. The absorbent article has at least a core compression portion that compresses the absorbent core in the thickness direction, and a pair of side sheets that cover the outer side of the auxiliary sheet,
The side sheet is joined to a side joint portion joined to the auxiliary sheet, and to a sheet extending inward in the width direction from the side joint portion and in contact with the non-skin surface of the side seat. with no side non-joints,
4. The absorbent article according to any one of claims 1 to 3, wherein the side non-joint portion is arranged in a region that does not overlap with the core compressed portion when the absorbent article is stretched. The top sheet is a laminated sheet of an upper layer mainly containing cotton fibers and a lower layer mainly containing heat-fusible fibers and located on the non-skin side of the upper layer,
In the top sheet, convex portions protruding to the skin surface side and concave portions protruding to the non-skin surface side extend in the front-rear direction and are alternately provided in the width direction,
The absorbent article according to any one of claims 1 to 4, wherein a fused portion in which the top sheet is fused to the auxiliary sheet is provided at least in a region overlapping with the recess. 6. The absorbent article according to claim 5, wherein the average fiber length of said water absorbent fibers of said top sheet is longer than the distance between said recesses. In the auxiliary sheet, an auxiliary convex portion that protrudes toward the non-skin surface side is formed in a region that overlaps with the convex portion, and an auxiliary concave portion that is concave toward the skin surface side is formed in a region that overlaps with the concave portion. The absorbent article according to claim 5 or 6. An auxiliary compressed portion is formed by compressing at least the auxiliary sheet in the thickness direction outside the outer edge of the top sheet in the width direction,
The absorbent article according to any one of claims 5 to 7 , wherein the auxiliary pressing portion and the fused portion are continuous in plan view. An auxiliary compressed portion is formed by compressing at least the auxiliary sheet in the thickness direction outside the outer edge of the top sheet in the width direction,
The absorbent article according to any one of claims 1 to 8 , wherein the auxiliary pressing portion extends in the front-rear direction. The absorbent core is provided with a low basis weight portion having a lower basis weight of absorbent material than the surrounding area,
The low basis weight portion has a front-rear low basis weight portion extending in the front-rear direction,
The absorbent article according to any one of claims 1 to 9 , wherein the front and rear low basis weight portions are arranged at the center of the absorbent article in the width direction in the rear region. The absorbent core is provided with a low basis weight portion having a lower basis weight of absorbent material than the surrounding area,
The low basis weight portion has a width low basis weight portion extending in the width direction,
The absorbent article according to any one of claims 1 to 10 , wherein the outer edge of the top sheet is located outside the outer edge of the width low basis weight portion in the width direction. The absorbent core is provided with a low basis weight portion having a lower basis weight of absorbent material than the surrounding area,
The low basis weight portion has a width low basis weight portion extending in the width direction,
An exposed portion where the auxiliary sheet is exposed is provided outside the outer edge of the top sheet in the width direction,
The absorbent article according to any one of claims 1 to 10 , wherein the width low basis weight portion is provided in a region overlapping with the exposed portion. The absorbent article has at least a core compression part in which the absorbent core is compressed in the thickness direction,
The core compressed portion includes a first compressed portion where the top sheet and the absorbent core are compressed together in a region overlapping with the top sheet, and a region where the auxiliary sheet extends outward in the width direction from the top sheet. a second compressed portion in which the auxiliary sheet and the absorbent core are compressed together in
The absorbent article according to any one of claims 1 to 12 , wherein the first compressed portion and the second compressed portion are continuous in plan view.

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