JP2020096749A - Absorbent article - Google Patents

Abstract

To improve fitness to the body in an absorbent article used by being attached to a wear article.SOLUTION: An absorbent article (1) used by being attached to a wear article has: a central area (S1) facing a wearer's excretion port; a rear side area (3) positioned at the back of the central area; and an absorbent core (30) arranged at least in the central area and the rear side area. The absorbent core is provided with a low basis weight part lower in basis weight of the absorbent material than the surroundings. The low basis weight part has: a first low basis weight part (41) extending in a back and forth direction across the central area and the rear side area in the center of a width direction of the absorbent core; and a second low basis weight part (42) extending in the width direction in the rear side area. The first low basis weight part and the second low basis weight part are connected. The length of the second low basis weight part in the back and forth direction is larger than thickness of the absorbent core.SELECTED DRAWING: Figure 1

Description

The present invention relates to an absorbent article that is attached to a wearing article such as a sanitary napkin.

Patent Document 1 discloses an absorbent article having a middle-height portion protruding toward the skin contact surface side and a lateral groove extending in the width direction. The middle height portion extends in the front-rear direction at the center of the absorbent core in the width direction. The middle and high parts allow the absorbent core to fit the excretory opening of the wearer. A plurality of lateral grooves are arranged at intervals in the front-rear direction. The absorbent core is arranged along the roundness of the body extending in the front-back direction of the wearer by the deformation of the absorbent core based on the plurality of lateral grooves.

JP, 2014-104093, A

However, the above-mentioned absorbent article has the following problems.
The absorbent article that is used by being attached to the wearable article as in Patent Document 1 generally does not include a member (for example, a waistband) that presses the absorbent article against the body of the wearer, and The absorbent article is pressed against the body. The absorbent article can be deformed along the roundness of the body by being pressed against the body by the wearing article. However, in a form in which the worn article itself does not adhere to the body, the adhesiveness of the absorbent article also deteriorates, and it may be difficult to realize a shape that conforms to the body.

As a result of various investigations by the applicant, it was found that there is a tendency to use wearing articles having low adhesion in various countries. The absorbent article attached to the wearing article having low adhesion may not be pressed against the body by the wearing article. Therefore, the absorbent article cannot be deformed along the roundness of the body, and it may not be possible to obtain a sufficient fit to the body.

The present invention has been made in view of the above problems, and an object of the present invention is to improve the fit to the body of an absorbent article that is attached to a wearing article and used.

The absorbent article according to one aspect includes a front-rear direction and a width direction orthogonal to each other, a central region facing a wearer's excretory opening, a rear region located rearward of the central region, and at least the central region. And an absorbent core disposed in the rear side area, wherein the absorbent core is provided with a low basis weight portion in which a basis weight of an absorbent material is lower than that of a surrounding area, and the absorbent core is used by being attached to a worn article. The absorbent article according to claim 1, wherein the low basis weight portion is a first low basis weight portion that extends in the front-rear direction across the central region and the rear side region at the center in the width direction of the absorbent core, A second low basis weight portion extending in the width direction in the rear side area, wherein the first low basis weight portion and the second low basis weight portion are connected to each other, and the second low basis weight portion is connected. The length in the front-back direction is longer than the thickness of the absorbent core.

It is a top view of an absorptive article seen from the skin side in a 1st embodiment. It is a top view of an absorptive article seen from the non-skin side in a 1st embodiment. FIG. 3A is a cross-sectional view of the absorbent article taken along the line 3A-3A in FIG. 1. FIG. 4A is a cross-sectional view of the absorbent article taken along the line 4A-4A in FIG. 1. It is a top view of an absorption core. It is a perspective view of the absorbent article in use. It is a top view of the absorptive article seen from the skin side in a 2nd embodiment.

(1) Outline of Embodiment At least the following matters will be made clear by the present specification and the description of the accompanying drawings.
The absorbent article according to one aspect is a front-rear direction and a width direction orthogonal to each other, a central region facing the excretory opening of the wearer, a rear region located rearward of the central region, and at least the central region. And an absorbent core disposed in the rear side area, wherein the absorbent core is provided with a low basis weight portion in which a basis weight of an absorbent material is lower than that of a surrounding area, and the absorbent core is used by being attached to a worn article. The absorbent article according to claim 1, wherein the low basis weight portion is a first low basis weight portion that extends in the front-rear direction across the central region and the rear side region at the center in the width direction of the absorbent core, A second low basis weight portion extending in the width direction in the rear side area, wherein the first low basis weight portion and the second low basis weight portion are connected to each other, and the second low basis weight portion is connected. The length in the front-rear direction is longer than the thickness of the absorbent core.

According to this aspect, the absorbent core in the central region is deformed with the first low basis weight portion as a base point by being subjected to a force directed from the outer side to the inner side in the width direction by being sandwiched by the legs of the wearer. By deforming the absorbent core in a convex shape with the first low basis weight portion as the apex, the absorbent core fits into the excretory opening of the wearer. Since the first low basis weight portion and the second low basis weight portion are connected to each other, the convex deformation having the first low basis weight portion as an apex is transmitted to at least the front edge of the second low basis weight portion. Then, the absorbent core in the rear region is deformed in the front-rear direction with the second low basis weight portion extending in the width direction as a base point. Since the length of the second low basis weight portion in the front-rear direction is longer than the thickness of the absorbent core, the absorbent cores sandwiching the second low basis weight portion in the front-rear direction are deformed when the second low basis weight portion serves as a base point. It is hard to hit. Therefore, the absorbent core is likely to be greatly deformed with the second low basis weight portion as a base point, and easily conforms to the roundness of the body extending in the front-rear direction while maintaining the convex shape with the first low basis weight portion as the apex. Even when the body article is not pressed by the wearing article, the absorbent core in the rear region is likely to be arranged along the roundness of the buttocks. Therefore, it is possible to achieve both the fitting property for the excretory opening and the fitting property for the buttocks.

According to a preferred aspect, the first low basis weight portion and the second low basis weight portion are provided outside the first low basis weight portion in the width direction and on the front side of the second low basis weight portion. The high grammage part in which the grammage of the absorbent material is higher than that of the second low grammage part may be continuous from the front edge of the second low grammage part to the center of the central region in the front-rear direction.

According to this aspect, since the high grammage section is continuous from the second low grammage section to the center in the front-rear direction of the central region, the absorbent core is anterior to the body in the front-rear direction relative to the second low grammage section. It is difficult to form a deformation base point that greatly bends. Therefore, when a force is applied from the outer side in the width direction to the inner side in the width direction, the force is likely to concentrate on the first low basis weight portion without being dispersed. Therefore, it is easy to form a convex shape having the first low basis weight portion as the apex. Further, after the convex shape having the first low basis weight portion as the apex is formed, the deformation having the first low basis weight portion as the apex can be supported by the high basis weight portion, and the convex shape with respect to the body is easily maintained. Therefore, in the vicinity of the region facing the excretory opening, a convex shape having the first low basis weight portion as the apex can be continuously formed, and the absorbent core can be continuously applied in the front-rear direction to absorb body fluid.

According to a preferred aspect, the second low basis weight portion extends from the center of the absorbent core in the width direction toward both outer sides in the width direction, and the width of the second low basis weight portion is the same. The center of the direction may be located rearward of the outer edge of the second low basis weight portion.

In the cross section of the buttocks along the width direction, the center in the width direction is more swollen than the side portions in the width direction. Therefore, in the region facing the roundness of the buttocks, it is preferable to deform the side portion in the width direction more forward than the center in the width direction. According to this aspect, since the side portion in the width direction is located on the front side with respect to the center in the width direction in the deformation with the second low basis weight portion as the base point, the absorbent core is more likely to follow the shape of the body, and the first low It is possible to deform with the second low basis weight portion as the base point while maintaining the convex shape with the basis weight portion as the base point.

According to a preferred aspect, the second low basis weight portion extends from the center of the absorbent core in the width direction toward both outer sides in the width direction, and the width of the second low basis weight portion is the same. The center of the direction may be located in front of the outer edge of the second low basis weight portion.

The convex deformation having the first low basis weight portion as the apex is transmitted from the central area toward the rear side area and is transmitted at least to the front edge of the second low basis weight portion. According to this aspect, since the center of the second low basis weight portion in the width direction protrudes to the front side, the convex deformation having the first low basis weight portion as the apex first causes the second low basis weight portion to be deformed. It is transmitted to the center in the width direction and is transmitted to the outer side in the width direction of the second low basis weight portion. Therefore, the convex deformation with the first low basis weight portion as the base point can be smoothly transmitted to the outer side and the rear side in the width direction with the second low basis weight portion as the base point. Therefore, even when the force to elevate the absorbent core is weak, it is easy to realize the deformation based on the first low basis weight portion and the second low basis weight portion.

According to a preferred aspect, a folding line for folding the absorbent article with the skin surface side inside is provided along the width direction, and the folding line is provided in the second low basis weight portion. May overlap.

When the folding line for folding with the skin side inside is strong, the absorbent article is likely to be deformed so as to be separated from the body due to the folding line. Since the fold line overlaps the second low basis weight portion, it is possible to weaken the crease due to the fold line and suppress deformation such that the absorbent article separates from the body. Further, when the crease due to the fold line is strong, the convex deformation with the first low basis weight portion as a base point may be divided, and the convex deformation may not be easily transmitted to the rear side. However, the weaker crease due to the fold line facilitates transmission in the front-rear direction without dividing the convex deformation having the first low basis weight portion as a base point.

According to a preferred aspect, the outer edge of the absorbent article is formed with a constricted portion that is recessed inward in the width direction, and the second low basis weight portion is the center in the front-rear direction of the central region. It may be located on the rear side with respect to the narrowed portion located on the innermost side in the width direction on the rear side.

According to this aspect, when the deformation base point due to the second low basis weight portion is formed in the front side or the constricted portion with respect to the constricted portion positioned most inside in the width direction, the vicinity of the constricted portion separates from the body, and side leakage occurs. It is easy to occur. However, since the deformation base point by the second low basic weight portion is formed on the rear side of the center in the front-rear direction and on the rear side of the necked portion located on the innermost side in the width direction, the lateral side in the vicinity of the necked portion is formed. Leakage can be suppressed.

According to a preferred aspect, side squeezing portions obtained by squeezing the absorbent core in the thickness direction are formed on both sides in the width direction with respect to the first low basis weight portion, and the side squeezing portions are formed in the front-rear direction. And may be connected to the second low basis weight portion.

According to this aspect, the side squeezing portion having a relatively high rigidity transmits a force toward the first low basis weight portion, and it is easy to form a convex shape based on the first low grammage portion having a relatively low rigidity. .. In addition, after the convex shape having the first low basis weight portion as the apex is formed, the deformation having the first low basis weight portion as the apex can be supported by the side compression portion, and the convex shape with respect to the body is easily maintained. Since the side pressing portion is connected to the second low basis weight portion, it is easy to continuously form a convex shape having the first low basis weight portion as the apex up to the second low basis weight portion.

According to a preferred aspect, the low basis weight portion has a side low basis weight portion extending in the front-rear direction on both sides in the width direction with respect to the first low basis weight portion, and the side low basis weight portion, It may be connected to the second low basis weight portion.

According to this aspect, since the side low basis weight portion is provided, the first low basis weight portion and the side low basis weight portion are deformed in cooperation with each other, and the absorbent core has the width W in the cross section along the width direction. It is easily deformed into a letter shape. Further, since the side low basis weight portion is connected to the second low basis weight portion, a convex shape having the first low basis weight portion as the apex can be continuously formed up to the second low basis weight portion.

According to a preferred aspect, the length of the second low basis weight portion in the front-rear direction may be longer than the length of the first low basis weight portion in the width direction.

According to this aspect, according to this aspect, the absorbent core is likely to be greatly deformed with the second low basis weight portion as a base point. On the other hand, it is difficult for the absorbent core to largely deform from the first low basis weight portion as the base point, and the deformation of the absorbent core from the first low basis weight portion as the base point becomes gentle. If the absorbent core is largely deformed with the first low basis weight as a base point, there is a possibility that a discomfort may occur with respect to the excretory opening or that the width of the absorbent core cannot be secured in the central region and side leakage may occur. The deformation of the absorbent core based on the first low basis weight portion can be moderated, and the problem can be suppressed.

According to a preferred aspect, the low basis weight section has a third low basis weight section extending in the width direction on the rear side of the second low basis weight section, and the third low basis weight section has the third low basis weight section. The length in the front-rear direction may be shorter than the length in the front-rear direction of the second low basis weight portion.

According to this aspect, it is possible to provide a deformation base point that is along the roundness of the body extending in the front-rear direction on the rear side of the second low grammage portion, and it is possible to further improve the fit to the buttocks in the rear side region. In addition, since the length of the third low basis weight portion in the front-rear direction is short, the third low basis weight portion is not significantly deformed from the base point, the third low basis weight portion is not too far from the body, and post-leakage can be suppressed. ..

According to a preferred aspect, the core wrap is arranged on the skin surface side of the absorbent core, and at least the absorbent core and the core wrap are compressed in a region overlapping with the first low basis weight portion. The first squeezed portion is not formed in the region where the portion is formed and overlaps with the second low basis weight portion, and the adhesive portion in which the core wrap and the absorbent core are joined via an adhesive is provided. You may be taken.

According to this aspect, the first low basis weight portion is more likely to be subjected to a stronger force by the legs than the second low basis weight portion. The first squeezing portion increases the rigidity of the first low basis weight portion, and the shape of the first low grammage portion is maintained even when a strong force is applied by the legs, and the first low grammage portion serves as the apex. It is easy to maintain the convex shape. Further, the force acting on the second low basis weight portion is likely to be weaker than that on the first low basis weight portion. Since the first compressed portion is not formed in the second low basis weight portion, the core wrap and the absorbent core are joined together while suppressing the uncomfortable feeling without increasing the rigidity of the second low basis weight portion too much. Bodily fluid can be drawn into the body to prevent leakage.

(2) Absorbent article according to the first embodiment Hereinafter, the absorbent article according to the first embodiment will be described with reference to the drawings. Absorbent articles include sanitary napkins, panty liners, and adult incontinence pads. The absorbent article may be an article used by being attached to the inside of a wearing article such as underwear.

In the following description of the drawings, the same or similar parts are denoted by the same or similar reference numerals. However, it should be noted that the drawings are schematic and the ratios of the respective dimensions may differ from the actual ones. Therefore, specific dimensions should be determined in consideration of the following description. In addition, there may be a case where the drawings include parts in which dimensional relationships and ratios are different from each other.

FIG. 1 is a plan view of the absorbent article as seen from the skin surface side in the first embodiment. FIG. 2 is a plan view of the absorbent article as seen from the non-skin surface side in the first embodiment. FIG. 3 is a cross-sectional view taken along the line 3A-3A shown in FIG. FIG. 4 is a cross-sectional view taken along the line 4A-4A shown in FIG. Here, the “skin surface side” corresponds to the side facing the wearer's skin during use. The "non-skin side" corresponds to the side facing away from the wearer's skin during use.

The absorbent article 1 has a front-back direction L, a width direction W, and a thickness direction T. The front-rear direction L is a direction extending from the front side (abdominal side) of the wearer to the rear side (back side), or a direction extending from the rear side of the wearer to the front side. The width direction W is a direction orthogonal to the front-rear direction L. The thickness direction T is a direction extending from the wearer's skin surface side T1 to the non-skin surface side T2, and is a direction orthogonal to the front-rear direction L and the width direction W. The skin surface side T1 corresponds to the side facing the wearer's skin during use. The non-skin surface side T2 corresponds to the side opposite to the skin surface side T1, that is, the side facing away from the wearer's skin during use.

The absorbent article 1 has a central area S1, a front area S2, and a rear area S3. The central region S1 is a region facing the excretory opening (eg, vaginal opening) of the wearer. When the absorbent article is worn on the underwear, the central area S1 is located at the crotch portion of the underwear. That is, the central region S1 is a region that is arranged between the wearer's inseam, that is, between the wearer's legs. The front area S2 is located in front of the central area S1. The front edge of the front region S2 defines the front edge of the absorbent article 1. The rear area S3 is located rearward of the central area S1. The rear edge of the rear region S3 defines the rear edge of the absorbent article 1. The length of the rear side region S3 in the front-rear direction L may be longer than the length of the central region S1 in the front-rear direction L.

The wing 3 described later may be provided in the central area S1. Further, a hip flap 4 that bulges outward in the width direction W may be provided in the rear side area S3. The front end edge of the wing 3 is defined by the base of the wing 3, and corresponds to the portion located on the front side of the two most recessed portions inward in the width direction W. The front edge of the wing 3 may define the boundary between the central area S1 and the front area S2. The rear end edge of the wing 3 is defined by the root of the wing 3, and corresponds to a portion located on the rear side of the two most recessed portions inward in the width direction W. The rear edge of the wing 3 may be located between the central area S1 and the rear area S3. Here, the region between the front end edge of the wing 3 and the rear end edge of the wing 3 in the front-rear direction L is referred to as a “wing area”. In the absorbent article having wings, the central area S1 is substantially the same area as the wing area. Therefore, it should be noted that in the present specification, the term "central region S1" can be read as "wing region".

The absorbent article 1 includes a skin sheet 10, a non-skin sheet 20, and an absorbent core 30. The skin sheet 10 is provided on the skin surface side T1 of the absorbent core 30. The non-skin surface sheet 20 is provided on the non-skin surface side T2 with respect to the absorbent core 30. The absorbent core 30 is provided between the skin sheet 10 and the non-skin sheet 20.

The skin sheet 10 is a liquid-permeable sheet that allows liquids such as body fluids to pass therethrough, and is made of any sheet-like material having a liquid-permeable structure, such as non-woven fabric, woven fabric, perforated plastic sheet, and mesh sheet. To be done. Further, the skin sheet 10 may be configured by a surface sheet that covers the center of the absorbent core 30 in the width direction and a side sheet that covers the outer edge of the surface sheet and extends outward in the width direction from the surface sheet. The topsheet may cover at least the center in the width direction of the absorbent core, and the side sheets may cover the outer edges of the topsheet in the width direction W and extend outward in the width direction W with respect to the topsheet. As the side sheet, a hydrophobic sheet may be used from the viewpoint of leakproofness.

The non-skin surface sheet 20 is a liquid impermeable sheet. As the non-skin surface sheet 20, a polyethylene sheet, a laminated non-woven fabric mainly composed of polypropylene, a breathable resin film, a sheet in which a breathable resin film is joined to a non-woven fabric such as spunbond or spunlace is used. it can.

The absorbent core 30 is arranged at least in the central region S1 and the rear region S3. Further, the absorbent core 30 may extend from the central area S1 to the front area S2. The absorbent core 30 is laminated with an absorbent material that absorbs liquid, and may be covered with a core wrap 31. The absorbent material that constitutes the absorbent core 30 can be formed of, for example, hydrophilic fibers, pulp, and super absorbent polymer (SAP). The absorbent core 30 may include thermoplastic resin fibers. The core wrap 31 can be made of, for example, a non-woven fabric or a tissue. The core wraps 31 may be arranged on the skin surface side T1 with respect to the absorbent core 30 and on the non-skin surface side T2 with respect to the absorption core 30, respectively, and arranged on the skin surface side T1 and the non-skin surface side T2. The core wrap 31 may be formed of the same sheet or may be formed of different sheets. As a modification, the absorbent core 30 may not have the core wrap. In this case, the absorbent core 30 may be covered with the skin sheet 10 and the non-skin sheet 20.

As described above, the absorbent article 1 has the wings 3 and the hip flaps 4. The wings 3 and the hip flaps 4 extend outside the outer edge of the absorbent core 30 in the central region S1 in the width direction W. The wings 3 and the hip flaps 4 may be formed by stacking a skin sheet 10 and a non-skin sheet 20. The wings 3 are configured to be folded back toward the non-skin surface sheet 20 side. The wing 3 is folded back to the non-skin side of the crotch portion of the underwear when used.

The hip flaps 4 are located on the rear side of the wings 3 and are provided in the rear side area S3. The hip flap 4 is not folded back during use and is placed between the underwear and the buttocks of the wearer. In this embodiment, the hip flap 4 is not provided with an absorbent material. Alternatively, the hip flap 4 may be provided with an absorbent material.

As shown in FIG. 2, the absorbent article 1 has an adhesive portion provided with an adhesive for joining the absorbent article 1 to a wearing article such as underwear. The adhesive section may include a main body adhesive section 61 arranged in a region overlapping with the absorbent core 30, a wing adhesive section 63 arranged in the wing 3, and a flap adhesive section 64 arranged in the hip flap 4. The main body adhesive portions 61 extend in the front-rear direction L and are arranged at intervals in the width direction W. The main body adhesive portions 61 are not arranged on the article width center 1CW which is the center of the absorbent article in the width direction W, but are arranged in two rows on each side of the article width center 1CW in the width direction W. These adhesive portions are provided on the non-skin surface side of the non-skin surface sheet 20. The adhesive section 60 may be covered with a covering sheet before use. The cover sheet prevents deterioration of the adhesive in the adhesive portion before use and is removed by the wearer when using the absorbent article.

The absorbent article 1 may have at least a compressed portion 80 formed by compressing the absorbent core 30 in the thickness direction. In the compression unit 80, at least the absorbent core 30 may be compressed in the thickness direction, the absorbent core 30 and the skin sheet may be compressed in the thickness direction, or the absorption core 30 and the core wrap 31 may be compressed in the thickness direction. The absorbent core 30, the core wrap 31, and the skin sheet 10 may be compressed in the thickness direction. The compression unit 80 may include a side compression unit 85 and a first compression unit 81. The side compression parts 85 are provided on both sides in the width direction W with respect to the first low basis weight part 41, and extend in the front-rear direction L. The 1st pressing part 81 may be arrange|positioned in the area|region which overlaps with the 1st low basic weight part 41.

The absorbent article 1 may be folded around the fold line before use, and a fold line for folding the absorbent article 1 in the front-rear direction L may be provided. The fold lines may be provided at intervals in the front-rear direction L. The folding line extends along the width direction W and may have a first folding line FL1 and a second folding line FL2. The first fold line FL1 is closest to the rear end edge of the absorbent article 1 in the front-rear direction L, and the second fold line FL2 is closest to the front end edge of the absorbent article 1 in the front-rear direction L. The first fold line FL overlaps with a second low grammage portion 42, which will be described later, and forms the fold line of the present invention. In the modification, another folding line extending in the width direction W may be arranged between the first folding line FL1 and the second folding line FL2. The first fold line FL1 and the second fold line FL2 are lines for folding the absorbent article 1 with the skin surface side T1 of the absorbent article 1 inside when the absorbent article is packaged (before use). The fold line can be specified by the position of the fold, and in the form in which the fold of the absorbent article 1 is difficult to specify, the fold line of the cover sheet or the like folded with the absorbent article is used as a reference. The position may be specified. When the absorbent article 1 is folded, the wings 3 and the hip flaps 4 are folded so as to cover the skin surface side of the absorbent core 30, and then the first fold line FL1 and the second fold line FL2 are folds. Therefore, in a state where the wings 3 and the hip flaps 4 are folded, a region where the wings 3 and the hip flaps 4 overlap (for example, the second low basis weight portion 42) easily has a crease.

(3) Detailed Configuration of Absorbent Core Next, the configuration of the absorbent core 30 will be described more specifically with reference to FIGS. 1 to 5. FIG. 5 is a plan view of the absorbent core 30. The absorbent core 30 is provided with a low grammage portion in which the grammage of the absorbent material is lower than that of the surrounding area. The low basis weight section may include a first low basis weight section 41, a second low basis weight section 42, a third low basis weight section 43, and a side low basis weight section 45. Here, the “low basis weight part” means a region having an absorbent material having a lower basis weight than the surrounding absorbent core 30 or a region having no absorbent material. As described above, the “low grammage portion” is a concept including a region in which the grammage of the absorbent core 30 is zero. Even when the “low basis weight portion” is a region having no absorbent material, the core wrap may wrap the entire absorbent core across the low basis weight portion. In this case, even if the absorbent core 30 is divided into a plurality of regions, the absorbent core 30 is integrally formed by the core wrap.

The basis weight of the absorbent core 30 in the low basis weight portion is preferably 180 g/m ² or less, more preferably 120 g/m ² or less. The deformation based on the low basis weight portion can be promoted, and the bodily fluid flowing out from the excretion opening can be quickly drawn into the absorbent core 30 and suppressed from being transmitted to the skin surface of the absorbent article 1. Further, the basis weight of the absorbent core 30 in the low basis weight portion may be substantially 0 g/m ² . When the basis weight of the low basis weight part is 0 g/m ² , it is preferable to use a tissue as the core wrap in order to prevent transmission leak. The difference between the basis weight of the absorbent core 30 in the low basis weight portion and the basis weight of the absorbent core 30 around the low basis weight portion may be 100 g/m ² or more, and preferably 200 g/m ² or more. May be Further, the basis weight of the absorbent core 30 in the low basis weight portion is preferably 80% or less, and more preferably 60% or less of the basis weight of the absorbent core 30 around the low basis weight portion. If the grammage of the low grammage part is too high, the crushed part may become too hard and may not be easily deformed. Therefore, the above range is preferable. The 1st low basic weight part 41, the 2nd low basic weight part 42, the 3rd low basic weight part 43, and the side low basic weight part 45 serve as a boundary where rigidity of absorption core 30 changes. Therefore, the first low basis weight portion 41, the second low basis weight portion 42, the third low basis weight portion 43, and the side low basis weight portion 45 correspond to regions where the absorbent core 30 is easily deformed.

The first low basis weight portion 41 extends in the front-rear direction L across the central region S1 and the rear region S3 at the center of the absorbent core 30 in the width direction W. The first low basis weight portion 41 may straddle the article width center 1CW. The first low basis weight section 41 is connected to the second low basis weight section 42. The first low basis weight portion 41 may be arranged between the center S1CL in the front-rear direction L of the central region S1 and the second low basis weight portion 42, and the front edge of the first low basis weight portion 41 is It may be located at the front edge 30F of the core 30. The first low basis weight portion 41 may extend beyond the second low basis weight portion 42 to the rear side. The rear end edge of the first low basis weight portion 41 may be located rearward of the center of the rear side region S3 in the front-rear direction L, or may be located at the rear end edge 30R of the absorbent core 30. In particular, in order to transmit the convex deformation having the first low basis weight portion 41 as a base point to the entire area of the absorbent core 30 in the front-rear direction L, the first low basis weight portion 41 includes the front end edge 30F and the rear edge of the absorbent core 30. It preferably extends to the edge 30R. In addition, in a modification, even if the low basic weight part different from the first low basic weight part 41 extends in the front-rear direction L in the center of the width direction W of the absorbent core 30 behind the second low basic weight part 42. Good. The low grammage portion different from the first low grammage portion 41 is a low grammage portion having a width different from the width of the first low grammage portion 41, and is continuous in the front-rear direction L like the first low grammage portion 41. It is possible to exemplify the low grammage portions that are arranged at intervals in the front-rear direction L.

The side low basis weight portion 45 may extend in the front-rear direction L on both sides of the first low basis weight portion 41 in the width direction W. The side low basis weight portion 45 may straddle the central area S1 and the rear area S3. The side low basis weight portion 45 may be separated from the first low basis weight portion 41 in the width direction W, and the distance may be at least longer than the thickness of the absorbent core 30, preferably 10 mm or more. May be The position and length of the side low basis weight portion 45 in the front-rear direction L may be the same as the first low basis weight portion 41. That is, the front edge of the side low basis weight portion 45 may be located at the front edge of the absorbent core 30. The side low basis weight portion 45 may be connected to the second low basis weight portion 42, and may extend beyond the second low basis weight portion 42 to the rear side. The rear end edge of the side low basis weight portion 45 may be located rearward of the center of the rear side region S3 in the front-rear direction L, or may be located at the rear end edge 30R of the absorbent core 30. The length of the first low basis weight portion 41 in the width direction W and the length of the side low basis weight portion 45 in the width direction W may be constant or may not be constant. The length of the side low basis weight portion 45 in the width direction W may be equal to or less than the length of the first low basis weight portion 41 in the width direction W.

The second low basis weight portion 42 extends in the width direction W in the rear side area S3. The second low basis weight portion 42 may not be arranged in the central area S1 and may be arranged rearward of the central area S1. The length of the second low basis weight portion 42 in the front-rear direction L may be constant or may not be constant. The length L42 of the second low basis weight portion 42 in the front-rear direction L is longer than the thickness T30 (see FIG. 3) of the absorbent core 30. The “thickness of the absorbent core” here is the thickness of the absorbent core 30 in the region adjacent to the second low basis weight portion 42. Further, in the form in which the length of the second low basis weight portion 42 in the front-rear direction L changes, the maximum length of the second low basis weight portion 42 in the front-rear direction L is set to the absorbent core 30 adjacent to the portion. Longer than the thickness of.

In addition, the measurement of the "basis weight and thickness of the absorbent core" in the present specification is performed by the following measuring method. When the absorbent article 1 is enclosed in a package or the like, a sample taken out from the package and left in that state for 12 hours in an atmosphere of 20° C.±2° C. and a relative humidity of 60%±5% RH is used. In the absorbent article wrapped with a wrapping sheet or the like, the package is opened, the folded absorbent article is unfolded, and the thickness of the portion for measuring the basis weight of the absorbent article is measured. Next, the portion for measuring the basis weight is cut out from the absorbent article, and the weight of the cut out portion is measured. Then, the absorbent core is removed from the cut out portion, and the thickness and weight of the top sheet, the back sheet, and the like other than the absorbent core are measured. When the absorbent core remains with an adhesive or the like, it is completely removed with toluene or the like, dried for 24 hours at room temperature, and then measured. The thickness of the absorbent core is measured by removing the thickness other than the absorbent core from the initially measured thickness of the absorbent article. Further, the weight other than the absorbent core is removed from the weight of the cut out portion, and the basis weight is calculated based on the area of the portion where the basis weight is measured.

The third low basis weight portion 43 extends in the width direction W in the rear side area S3. The third low basis weight portion 43 is located rearward of the second low basis weight portion 42 and is separated from the second low basis weight portion 42. The length of the third low basis weight portion 43 in the front-rear direction L may be constant or may not be constant. The second low basis weight portion 42 and the third low basis weight portion 43 may reach the outer edge of the absorbent core 30 or may be located inside the outer edge of the absorbent core 30 in the width direction W. .. The second low basis weight portion 42 and the third low basis weight portion 43 reach the outer edge of the absorbent core 30, so that the second low basis weight portion 42 and the third low basis weight portion 43 are used as base points for absorption. The core 30 is more easily deformed.

(4) Deformation Mode of Wearing Absorbent Article Next, the deformation mode of the absorbent article thus configured when worn will be described with reference to FIG. 6 and the like. FIG. 6 is a diagram schematically showing the absorbent article in use. The central region S1 receives a force from the outer side to the inner side in the width direction W. More specifically, when the wearing article with the absorbent article attached is pulled up, the wearing article and the absorbent article are pulled up while being caught inward by the legs, so that the central region S1 has an outer side in the width direction W. A force is applied from the inside. Further, in the state where the worn article is worn, since it is sandwiched between the legs of the wearer, a force from the outer side to the inner side in the width direction W is applied to the central region S1. At this time, the absorbent core 30 in the central area S1 deforms with the first low basis weight portion 41 as a base point. The absorbent core 30 is deformed into a convex shape with the first low basis weight portion 41 as the apex, so that the absorbent core 30 fits into the excretory opening of the wearer.

The first low basis weight portion 41 is provided across the central area S1 and the rear side area S3, and the first low basis weight portion 41 and the second low basis weight portion 42 are connected to each other. The convex deformation with the measuring portion 41 as the apex is transmitted to at least the front end edge of the second low basic weight portion 42. Then, the absorbent core 30 in the rear side region S3 is deformed in the front-rear direction L with the second low basis weight portion 42 extending in the width direction W as a base point, and is deformed along the body line extending in the front-rear direction L. Specifically, when a convex shape having the first low basis weight portion 41 as the apex is formed when the wearing article is pulled up, the absorbent article having the convex shape already formed is placed in the crotch of the wearer and worn. When the article is worn so as to cover the body, the article is deformed in the front-rear direction L with the second low basis weight portion 42 as a base point, and is deformed along the line of the body extending in the front-rear direction L. Since the length L42 of the second low basis weight portion 42 in the front-rear direction L is longer than the thickness T30 of the absorbent core 30, the second low basis weight portion 42 is moved in the front-rear direction during deformation with the second low basis weight portion 42 as a base point. It is difficult for the absorbent cores 30 sandwiched between L to collide with each other. Therefore, the absorbent core 30 is likely to be greatly deformed from the second low basis weight portion 42 as a base point, and along the roundness of the body extending in the front-rear direction L while maintaining the convex shape with the first low basis weight portion 41 as the apex. easy. That is, the convex shape having the first low basis weight portion 41 as the apex is difficult to be divided by the second low basis weight portion 42. Even when a wearing article with low adhesion is worn, even when the body article is not pressed by the wearing article, the absorbent core 30 in the central area S1 fits in the excretion opening while absorbing the rear area S3. The core 30 is likely to be arranged along the roundness of the buttocks. Therefore, it is possible to achieve both the fitting property for the excretory opening and the fitting property for the buttocks. Preferably, the first low basis weight portion 41 may be continuous from the front end edge 42F of the second low basis weight portion 42 to the center S1CL in the front-rear direction L of the central region S1. When a force is applied from the outer side to the inner side in the width direction W, the convex shape with the first low basis weight portion 41 as the apex continues from the center S1CL in the front-rear direction L of the central region S1 to the second low basis weight portion 42. Formed. Further, since the first low basis weight portion 41 extends to the rear side of the second low basis weight portion 42, the convex shape having the first low basis weight portion 41 as the apex forms the second low basis weight portion 42. Beyond that, it becomes easier to reach the rear side.

The low grammage portion extending in the width direction W is not formed in front of the second low grammage portion 42. Outside the first low basis weight portion 41 in the width direction W and in front of the second low basis weight portion 42, the basis weight of the absorbent material is higher than that of the first low basis weight portion 41 and the second low basis weight portion 42. The high grammage portion 48 having a high height is continuous from the front edge 42F of the second low grammage portion 42 to the center S1CL in the front-rear direction L of the central region S1. The high grammage portions 48 may be arranged on both sides of the first low grammage portion 41 in the width direction W, and one high grammage portion 48 is shown by hatching in FIG. 1. The high grammage portion 48 may be arranged between the first low grammage portion 41 and the side low grammage portion 45 in the width direction W. In W, it may be disposed between the first low basis weight portion 41 and the outer edge 30E of the absorbent core 30. The high grammage portion 48 may be disposed at least between the second low grammage portion 42 and the center S1CL of the central region S1 in the front-rear direction L in the front-rear direction L, and the second low grammage portion 42 and the absorbent core. It may be arranged between the front edges 30F of 30. It should be noted that the high grammage section 48 only needs to have a higher grammage of the absorbent material than the first low grammage section 41 and the second low grammage section 42, and the second low grammage section 42 and the third low grammage section 42. It may have the same basis weight as other areas, such as the area between 43 and the area outside the side low basis weight portion 45 in the width direction W, and may not be the area having the highest basis weight in the absorbent core 30. ..

Since the high grammage portion 48 is continuous from the second low grammage portion 42 to the center of the central region S1 in the front-rear direction L, the absorbent core 30 is disposed in front of the second low grammage portion 42 in the front-rear direction L of the body. It is difficult to form a deformation base point that greatly bends. Therefore, when a force is applied from the outer side in the width direction W to the inner side in the width direction W, the force is likely to concentrate on the first low basis weight portion 41 without being dispersed. Therefore, it is easy to form a convex shape with the first low basis weight portion 41 as the apex. Further, after the convex shape having the first low basis weight portion 41 as the apex is formed, the deformation having the first low basis weight portion 41 as the apex can be supported by the high basis weight portion 48, and the convex shape for the body is maintained. Easy to do. Therefore, in the vicinity of the region facing the excretion opening, a convex shape having the first low basis weight portion 41 as the apex can be continuously formed, and the absorbent core 30 can be continuously applied in the front-rear direction L to absorb body fluid.

The second low basis weight portion 42 may extend from the center of the absorbent core 30 in the width direction W toward both outsides in the width direction W. The second low basis weight portion 42 may extend linearly along the width direction W, or may extend curvilinearly along the width direction W. The center of the second low basis weight portion 42 in the width direction W may be located rearward of the outer edge of the second low basis weight portion 42. That is, the second low basis weight portion 42 may have a curved shape in which the center of the second low basis weight portion 42 in the width direction W projects rearward. It is preferable that the deformation of the absorbent core 30 based on the second low basis weight portion 42 be along the roundness of the body extending in the front-rear direction L while maintaining the convex shape with the first low basis weight portion 41 as the apex. .. In the cross section of the buttocks along the width direction W, the center in the width direction W is swelled more than the side portions in the width direction W. Therefore, in the region facing the roundness of the buttocks, it is preferable to deform the side portion in the width direction W more forward than the center in the width direction W. The deformation based on the second low basis weight portion 42 is formed such that the side portion in the width direction W is formed on the front side rather than the center in the width direction W, and the absorbent core 30 is more likely to follow the shape of the body. The second low basis weight portion 42 can be deformed while maintaining the convex shape with 41 as the base point. Therefore, the absorbent core 30 is deformed so as to follow the roundness of the buttocks in the front-rear direction L and the roundness in the width direction W, and the buttocks can be covered with the absorbent article 1 having a rounded shape.

A low grammage portion that extends in the front-rear direction L at the center of the absorbent core 30 in the width direction W may be provided on the rear side of the second low grammage portion 42. In the present embodiment, the first low basis weight portion 41 extends in the front-rear direction L at the center of the absorbent core 30 in the width direction W even on the rear side of the second low basis weight portion 42. According to such a configuration, a convex deformation having the center in the width direction W of the absorbent core 30 as an apex can be formed on the rear side of the second low basis weight portion 42, and the fit property with respect to the gap between the buttocks can be obtained. It is possible to further improve the leakage and suppress the leakage of body fluid.

The first fold line FL for folding the absorbent article may overlap the second low basis weight portion 42. It is sufficient that at least a part of the first folding line FL1 overlaps the second low basis weight portion 42. When the folding line for folding with the skin side inside is strong, the absorbent article is likely to be deformed so as to be separated from the body due to the folding line. Since the fold line overlaps the second low basis weight portion 42, it is possible to weaken the crease due to the fold line and suppress deformation such that the absorbent article 1 separates from the body. Further, when the crease due to the fold line is strong, the convex deformation with the first low basis weight portion 41 as a base point may be divided, and the convex deformation may not be easily transmitted to the rear side. However, the weaker crease due to the fold line facilitates transmission in the front-rear direction L without dividing the convex deformation with the first low basis weight portion 41 as the base point. Further, the first fold line FL1 may be formed in a region where the second low basis weight portion 42 overlaps the region extending from the first low basis weight portion 41 in the front-rear direction L. The crease due to the first folding line FL1 is weakened, and it becomes easy to continuously form the convex shape having the first low basis weight portion 41 as the apex in the front-rear direction without being affected by the first folding line FL1.

As shown in FIG. 1, the outer edge 1E of the absorbent article is formed with a constricted portion that is recessed inward in the width direction W. The constricted portion is a portion that is recessed inward in the width direction W with respect to the front and rear regions. The constricted portion includes a first constricted portion 71 located at the front end edge of the wing 3, a second constricted portion 72 located at the rear end edge of the wing 3, and a third constricted portion located near the center of the hip flap 4 in the front-rear direction L. A section 73 is provided. A second constricted portion 72 and a third constricted portion 73 are provided on the rear side of the center of the central region S1 in the front-rear direction L. The second constricted portion 72 is recessed inward in the width direction W with respect to the third constricted portion, and is located on the innermost side in the width direction W on the rear side with respect to the center of the central region S1 in the front-rear direction L of the present invention. Constriction". The second low basis weight portion 42 may be located rearward of the second constricted portion 72 located on the innermost side in the width direction W on the rear side of the center of the central region S1 in the front-rear direction L. When the deformation base point of the second low basis weight portion 42 is formed on the front side of the second constricted portion 72 located on the innermost side in the width direction W or in the second constricted portion 72, the vicinity of the second constricted portion 72 separates from the body. Lateral leakage is likely to occur. However, since the deformation base point of the second low basis weight portion 42 is formed on the rear side of the second constricted portion 72, lateral leakage in the vicinity of the second constricted portion 72 can be suppressed.

Side compression parts 85 extending in the front-rear direction L may be formed on both sides of the first low basis weight part 41 in the width direction W. The side squeezing section 85 transmits a force toward the first low basis weight section 41, and it is easy to form a convex shape with the first low basis weight section 41 having a relatively low rigidity as a base point. Further, after the convex shape with the first low basis weight portion 41 as the apex is formed, the deformation with the first low basis weight portion 41 as the apex can be supported by the side squeeze 85 part, and the convex shape with respect to the body is maintained. easy. Further, the side pressing portion 85 may be connected to the second low basis weight portion 42. Since the side pressing portion 85 is connected to the second low basis weight portion 42, it is easy to continuously form a convex shape having the first low basis weight portion 41 as the apex up to the second low basis weight portion 42.

Side low basis weight portions 45 are provided on both outer sides of the first low basis weight portion 41 in the width direction W. The absorbent core 30 is deformed with the side low basis weight portion 45 and the first low basis weight portion 41 as base points. More specifically, when a force is applied from the outer side to the inner side in the width direction W, the absorbent core 30 is deformed with the pair of side low basis weight portions 45 as a base point, and the region between the side low basis weight portions 45 is on the wearer side. Rise to. At this time, since the first low basis weight portion 41 is provided between the side low basis weight portions 45, the region between the side low basis weight portions 45 deforms with the first low basis weight portion 41 as the apex. By providing the side low basis weight portion 45, the first low basis weight portion 41 and the side low basis weight portion deform in cooperation with each other, and the absorbent core deforms into a W shape in a cross section along the width direction. Easy to do. Further, the deformation with the first low basis weight portion 41 as the apex is stable. The side low basis weight portion 45 may be connected to the second low basis weight portion 42. Since the side low basis weight portion 45 is connected to the second low basis weight portion 42, a convex shape having the first low basis weight portion 41 as an apex can be continuously formed up to the second low basis weight portion 42.

Further, the second high grammage portion 49 may be provided outside the side low grammage portion 45 in the width direction. The second high basis weight portion 49 may be arranged between the side low basis weight portion 45 and the outer edge of the absorbent core. The length in the width direction of the second high grammage portion 49 may be longer than the length in the width direction of the high grammage portion 48. It should be noted that the high basis weight section 48 and the second high basis weight section 49 need only have a higher basis weight of the absorbent material than the first low basis weight section 41 and the second low basis weight section 42. The amount does not have to be constant. Further, the basis weight of the high basis weight section 48 and the basis weight of the second high basis weight section 49 may be different.

The compression unit 80 may be arranged outside the side low basis weight portion 45 in the width direction W. The rigidity of the outer region in the width direction W is higher than that of the side low basis weight portion 45, and the side difference between the side low basis weight portions facilitates deformation due to the difference in rigidity. This makes it easier to raise. In addition, the region outside the side low basis weight part 45 in the width direction W has higher rigidity due to the compression part 80, is less likely to be affected by the W-shaped deformation of the absorbent core, and lateral leakage can be suppressed.

The main body adhesive section 61 may be arranged in a region that does not overlap the first low basis weight section 41 and the side low basis weight section 45. That is, the main body adhesive portion 61 is arranged between the first low basis weight portion 41 and the side low basis weight portion 45 in the width direction, and the first low basis weight portion 41 is arranged between the main body adhesive portions 61 in the width direction. It may be arranged. Due to the rigidity difference between the region where the main body adhesive portion 61 is arranged and the first low basis weight portion 41, the first low basis weight portion 41 is easily deformed at the base point. Similarly, due to the difference in rigidity between the region where the main body adhesive portion 61 is arranged and the side low basis weight portion 45, the side low basis weight portion 45 is easily deformed at the base point. Moreover, since the region overlapping the first low basis weight portion 41 and the side low basis weight portion 45 is not joined to the wearing article via the main body adhesive portion 61, it is easily deformed flexibly, and as a deformation starting point of the absorbent core. Easy to function.

The length L42 of the second low basis weight portion 42 in the front-rear direction L may be longer than the length W41 of the first low basis weight portion 41 in the width direction W. According to this aspect, the absorbent core 30 is likely to be greatly deformed with the second low basis weight portion 42 as the base point. On the other hand, it is difficult for the absorbent core 30 to largely deform from the first low basis weight portion 41 as a base point, and the deformation of the absorbent core 30 based on the first low basis weight portion 41 becomes moderate. If the absorbent core 30 is largely deformed with the first low basis weight as a base point, there is a possibility that an uncomfortable feeling may occur in the excretory opening, or the width of the absorbent core 30 in the central region S1 cannot be ensured, and side leakage may occur. .. The deformation of the absorbent core 30 based on the first low basis weight portion 41 can be moderated, and the defect can be suppressed.

The third low basis weight section 43 may be provided on the rear side of the second low basis weight section 42. A deformable base point that extends along the roundness of the body extending in the front-rear direction L can be provided on the rear side of the second low basis weight portion 42, and the fit to the buttocks in the rear side region can be further improved. The length of the third low basis weight portion 43 in the front-rear direction L may be shorter than the length of the second low basis weight portion 42 in the front-rear direction L. A deformable base point that extends along the roundness of the body extending in the front-rear direction L can be provided on the rear side of the second low basis weight portion 42, and the fit to the buttocks in the rear side region can be further improved. In addition, since the length of the third low basis weight portion 43 in the front-rear direction L is short, the absorbent core is not easily deformed from the third low basis weight portion 43 as a base point, and the third low basis weight portion 43 is too far from the body. It is possible to suppress after-leakage. Further, in an absorbent article such as a sanitary napkin for night use, in which the back side region has a long length in the front-rear direction, a low basis weight portion extending in the width direction is provided rearward of the third low basis weight portion. May be provided. That is, a plurality of low grammage portions may be provided on the rear side of the second low grammage portion 42. In an absorbent article in which the back side region has a long length in the front-rear direction, the back side region can be easily arranged along the roundness of the buttocks.

The shape of the third low basis weight portion 43 is preferably a shape along the second low basis weight portion 42. For example, in the case where the second low basis weight portion 42 has a curved shape in which the center of the second low basis weight portion 42 in the width direction W projects rearward, the third low basis weight portion 43 and the third low basis weight portion 43 also. The center of the basis weight portion 43 in the width direction W may have a curved shape protruding rearward. When the absorbent core 30 is deformed, the second low grammage portion 42 and the third low grammage portion 43 are less likely to interfere with each other, and it is easy to realize the deformation based on each of them.

The 1st pressing part 81 is formed in the area|region which overlaps with the 1st low basic weight part 41, and the 1st pressing part 81 is not formed in the area|region which overlaps with the 2nd low basic weight part 42. An adhesive portion 35 in which the core wrap 31 and the absorbent core 30 are joined may be provided. In the first pressing unit 81 of the present embodiment, the core wrap located on the skin surface side of the absorbent core 30, the absorbent core 30, and the core wrap located on the non-skin surface side of the absorbent core 30 are compressed. There is. The first low basis weight portion 41 is more likely to be subjected to a stronger force by the legs than the second low basis weight portion 42. The rigidity of the first low basis weight portion 41 is increased by the first pressing portion 81, and the shape of the first low basis weight portion 41 is maintained even when a strong force is applied by the legs. It is easy to maintain the convex shape with 41 as the apex. Further, the force acting on the second low basis weight portion 42 tends to be weaker than that on the first low basis weight portion 41. By joining the core wrap 31 and the absorbent core 30 while suppressing the uncomfortable feeling without excessively increasing the rigidity of the second low basis weight portion 42 by not forming the first compressed portion in the second low basis weight portion 42. Thereby, the body fluid can be drawn into the absorbent core 30 and the transmission leakage can be suppressed.

(5) Absorbent article according to second embodiment Next, the absorbent article 1X according to the second embodiment will be described based on FIG. 7. In the following description of the second embodiment, the same components as those in the first embodiment will be designated by the same reference numerals and description thereof will be omitted. In the absorbent article 1X according to the second embodiment, the shape of the second low basis weight portion 42 is different from that of the second low basis weight portion 42X of the absorbent article according to the first embodiment. The second low basis weight portion 42X according to the second embodiment has a curved shape in which the center of the second low basis weight portion 42X in the width direction W projects forward.

The convex deformation having the first low basis weight portion 41 as the apex is transmitted from the central region S1 toward the rear side region S3 and is transmitted at least to the front edge of the second low basis weight portion 42X. Since the center of the second low basis weight portion 42X in the width direction W is protruded to the front side, the convex deformation with the first low basis weight portion 41 as the apex is first performed in the width direction of the second low basis weight portion 42. It is transmitted to the center of W and is transmitted to the outer side in the width direction W of the second low basis weight portion 42X. The convex deformation with the first low basis weight portion 41 as the base point is smoothly transmitted to the outer side and the rear side in the width direction W with the second low basis weight portion 42X as the base point. Therefore, even when the force to elevate the absorbent core 30 is weak, it is easy to realize the deformation based on the first low basis weight portion 41 and the second low basis weight portion 42X.

Although the present invention has been described in detail above using the above-described embodiments, it is obvious to those skilled in the art that the present invention is not limited to the embodiments described in this specification. The present invention can be implemented as modified and changed modes without departing from the spirit and scope of the present invention defined by the description of the claims. Therefore, the description of the present specification is for the purpose of exemplifying explanation, and does not have any restrictive meaning to the present invention.

According to this aspect, it is possible to provide an absorbent article that is used by being attached to a wearing article and that can improve the fit to the body.

1: Absorbent article 10: Skin surface sheet 20: Non-skin surface sheet 30: Absorption core 41: First low basis weight part 42: Second low basis weight part 43: Third low basis weight part 45: Side low basis weight Part 81: 1st pressing part 85: Side pressing part L: Front-back direction W: Width direction T: Thickness direction S1: Central area S2: Front side area S3: Rear side area 1CW: Article width center

Claims (11)

Front-back direction and width direction orthogonal to each other,
A central area facing the wearer's excretory opening,
A rear side area located behind the central area,
At least the central region and an absorbent core arranged in the rear region,
An absorbent article used by being attached to a wearing article,
The absorbent core is provided with a low basis weight portion in which the basis weight of the absorbent material is lower than the surroundings,
The low basis weight portion includes a first low basis weight portion extending in the front-rear direction across the central region and the rear side region at the center of the absorbent core in the width direction, and the width in the rear side region. A second low basis weight portion extending in the direction,
The first low basis weight portion and the second low basis weight portion are connected,
The absorbent article in which the length of the second low basis weight portion in the front-rear direction is longer than the thickness of the absorbent core. On the outer side in the width direction of the first low basis weight portion and on the front side of the second low basis weight portion, the basis weight of the absorbent material is higher than that of the first low basis weight portion and the second low basis weight portion. 2. The absorbent article according to claim 1, wherein the high grammage part having a high value is continuous from the front edge of the second low grammage part to the center of the central region in the front-rear direction. The second low basis weight portion extends from the center of the absorbent core in the width direction toward both outer sides in the width direction,
The absorbent article according to claim 1 or 2, wherein a center of the second low basis weight portion in the width direction is located rearward of an outer edge of the second low basis weight portion. The second low basis weight portion extends from the center of the absorbent core in the width direction toward both outer sides in the width direction,
The absorbent article according to claim 1 or 2, wherein the center of the second low basis weight portion in the width direction is located on the front side with respect to the outer edge of the second low basis weight portion. A fold line for folding with the skin side of the absorbent article inside is provided along the width direction,
The absorbent article according to any one of claims 1 to 4, wherein the fold line overlaps the second low basis weight portion. On the outer edge of the absorbent article, a constricted portion that is recessed inward in the width direction is formed,
The second low basis weight portion is located on the rear side of a constricted portion located on the innermost side in the width direction on the rear side with respect to the center of the central region in the front-rear direction. The absorbent article according to any one of claims. On both sides in the width direction with respect to the first low basis weight portion, side squeezing portions obtained by squeezing the absorbent core in the thickness direction are formed,
The absorbent article according to any one of claims 1 to 6, wherein the side compression portion extends in the front-rear direction and is connected to the second low basis weight portion. The low basis weight portion has side low basis weight portions extending in the front-rear direction on both sides in the width direction with respect to the first low basis weight portion,
The absorbent article according to any one of claims 1 to 7, wherein the side low grammage section is connected to the second low grammage section. The absorptivity according to any one of claims 1 to 8, wherein a length of the second low basis weight portion in the front-rear direction is longer than a length of the first low basis weight portion in the width direction. Goods. The low basis weight portion has a third low basis weight portion extending in the width direction on the rear side of the second low basis weight portion,
The absorptivity according to any one of claims 1 to 9, wherein a length of the third low basis weight portion in the front-rear direction is shorter than a length of the second low basis weight portion in the front-rear direction. Goods. Having a core wrap arranged on the skin side of the absorbent core,
In a region overlapping the first low basis weight portion, at least a first compressed portion obtained by compressing the absorbent core and the core wrap is formed,
The area where the second low basis weight section overlaps is provided with an adhesive section in which the first squeezed section is not formed and the core wrap and the absorbent core are joined via an adhesive. 11. The absorbent article according to any one of claims 10 to 10.

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