JP7385359B2 - absorbent articles - Google Patents

Description

The present invention relates to an absorbent article provided with a pair of bending base portions extending in the front-rear direction with the widthwise center of the absorbent article in between.

Patent Document 1 discloses an absorbent article having a pair of bending base portions extending in the front-rear direction with the center in the width direction of the absorbent article in between. The bending base portion is arranged in the central region facing the wearer's excretion opening. When the central region is pinched by the wearer's legs when worn, a force is applied to the central region from the outside in the width direction to the inside in the width direction. The central region is deformed using the bending base portions as a base point, and deforms so that the area sandwiched by the bending base portions bulges toward the wearer.

Japanese Patent Application Publication No. 2012-130365

However, when the region sandwiched by the bending base portions deforms so as to bulge toward the wearer, the length of the central region in the width direction becomes shorter. Therefore, there was a risk that body fluids that had spread in the width direction from the bending base point would leak sideways.

Therefore, it is an object of the present invention to provide an absorbent article that can suppress lateral leakage in the central region while ensuring fit to the excretion opening in the region sandwiched by the bending base portions.

The absorbent article according to one aspect includes a front-back direction and a width direction that are orthogonal to each other, a central region facing the wearer's excretion opening, a rear region located behind the central region, and a rear region located behind the central region. An absorbent article having a front region located on the front side, an absorbent core located at least in the central region, and a skin sheet located on the skin surface side of the absorbent core, the central region comprising: A pair of bending base portions are provided that extend in the front-back direction across the widthwise center of the absorbent article, and the maximum width of the absorbent core in the central region is the maximum width of the absorbent core in the front side region. The outer edge of the absorbent core is longer than the width, and the outer edge of the absorbent core is located on the outer side of the bending base point in the width direction, and the center region is a center center portion that includes the center of the center region in the front-rear direction. and a center end portion located on the outer side of the center center portion in the front-rear direction, and the distance in the width direction between the outer edge of the absorbent core at the center center portion and the bending base point portion is It is longer than the distance in the width direction between the outer edge of the absorbent core and the bending base point at the central end.

It is a top view of the absorbent article seen from the skin surface side in an embodiment. It is a top view of the absorbent article seen from the non-skin surface side in an embodiment. FIG. 2 is a cross-sectional view of the absorbent article taken along line AA in FIG. 1. FIG. FIG. 2 is an enlarged view of part B in FIG. 1. FIG. It is a top view of an absorbent core. FIG. 2 is a perspective view of the absorbent article in a worn state. FIG. 2 is a cross-sectional view of the absorbent article in a worn state. FIG. 2 is a cross-sectional view of the absorbent article in a worn state.

(1) Overview of the embodiments At least the following points will become clear from the description of this specification and the accompanying drawings.
The absorbent article according to one aspect includes a front-back direction and a width direction that are orthogonal to each other, a central region facing the wearer's excretion opening, a rear region located behind the central region, and a rear region located behind the central region. An absorbent article having a front region located on the front side, an absorbent core located at least in the central region, and a skin sheet located on the skin surface side of the absorbent core, the central region comprising: A pair of bending base portions are provided that extend in the front-back direction across the widthwise center of the absorbent article, and the maximum width of the absorbent core in the central region is the maximum width of the absorbent core in the front side region. The outer edge of the absorbent core is longer than the width, and the outer edge of the absorbent core is located on the outer side of the bending base point in the width direction, and the center region is a center center portion that includes the center of the center region in the front-rear direction. and a center end portion located on the outer side of the center center portion in the front-rear direction, and the distance in the width direction between the outer edge of the absorbent core at the center center portion and the bending base point portion is It is longer than the distance in the width direction between the outer edge of the absorbent core and the bending base point at the central end.

When the central region is pinched by the wearer's legs when worn, the region sandwiched by the bending base portions of the central region deforms to bulge toward the wearer and fits into the excretory opening. The central region is more susceptible to the force of the wearer's legs than the front region, and the length in the width direction tends to be shorter. However, since the maximum width of the absorbent core in the central region is longer than the maximum width of the absorbent core in the front region, it is easy to ensure the widthwise length of the absorbent core in the central region, and lateral leakage can be suppressed. Furthermore, the central portion is more likely to be placed near the excretion port than the central end portion, and body fluids are more likely to be guided thereto. However, because the distance between the outer edge of the absorbent core and the bending point at the central center is relatively long, even if body fluid is guided to an area outside the bending point at the center in the width direction, side leakage may occur. can be suppressed. Therefore, it is possible to suppress lateral leakage in the central region while ensuring the fit of the region sandwiched by the bending base portions to the excretion port.

According to a preferred aspect, an outer edge of the absorbent core at the central center portion may be located further outward in the width direction than an outer edge of the absorbent core at the central end portion.

The center center part is particularly susceptible to the force of the legs in the central region, and the length in the width direction tends to be shortened. However, since the outer edge of the absorbent core at the central center is located outside the outer edge of the absorbent core in the width direction than the outer edge of the absorbent core at the central end, it is easy to ensure the widthwise length of the absorbent core at the center, and Leakage can be suppressed.

According to a preferred aspect, the bending base portion may be configured by a compressed portion that compresses at least the absorbent core in the thickness direction.

The bending base point made of the compressed part has a difference in rigidity and thickness compared to the surrounding area, and tends to become a base point for deformation. In addition, the bending base portion consisting of the compressed portion has a higher density than the surrounding area and easily draws in body fluids. Therefore, while the body fluid that has reached the bending base point is diffused in the front-rear direction, it is made difficult to diffuse outward in the width direction from the bending base point, and lateral leakage can be further suppressed.

According to a preferable aspect, a side compressed portion in which at least the absorbent core is compressed in the thickness direction is provided in a region outside the bending base portion in the width direction, and the thickness of the side compressed portion is The deepest part in the width direction may be located closer to the skin surface than the deepest part in the thickness direction of the compressed part.

The side compression portions increase the rigidity of the area outside the bending base point in the width direction, and can prevent the area outside the bending base point from becoming too wide when pinched by the legs. Therefore, the length in the width direction of the region outside the bending base point in the width direction can be ensured, and lateral leakage can be suppressed. In addition, because the degree of compression of the side compression part is weak, the rigidity of the area outside the bending point in the width direction does not become too high, and the area outside the bending point in the width direction does not touch the leg. It is possible to suppress the discomfort that occurs when

According to a preferable aspect, the absorbent core in a region sandwiched between the pair of bending base points has a basis weight greater than that of the absorbent core in a region outside the pair of bending bases in the width direction. A high basis weight section may be provided.

The high basis weight portion increases the body fluid absorption capacity in the region between the pair of bend base points, reduces the amount of body fluid that reaches the region outside the bend base points in the width direction, and further suppresses lateral leakage. Further, the high basis weight portion increases the thickness of the region between the pair of bending base portions, thereby improving the fit of the region between the pair of bending base portions to the excretion opening. In addition, the high basis weight portion increases the rigidity of the region between the pair of bending base portions, suppressing unintentional twisting or folding when a force directed inward in the width direction is applied, and ensuring a good fit.

According to a preferred aspect, at least a part of the region sandwiched between the pair of bending base portions may be provided with a central compressed portion in which at least the absorbent core is compressed.

According to this aspect, the ability to draw in body fluids in the area between the pair of bending base parts is enhanced, the body fluid reaching the area outside the bending base parts in the width direction is reduced, and side leakage can be further suppressed. . In addition, the central compressed portion increases the rigidity of the area between the pair of bending base portions, suppressing unintentional twisting or folding when a force directed inward in the width direction is applied, and ensuring a good fit.

According to a preferred aspect, a joint is provided for joining the absorbent article to a wearing article, and the joint has a main body joint disposed in a region overlapping with the absorbent core, and the main body joint may be arranged in a region of the central center that does not overlap with an outer edge of the absorbent core.

The force when pinched by the wearer's legs is likely to be applied to the central center, and particularly to the outer edges of the absorbent core at the central center. At this time, since the main body joining portion does not overlap the outer edge of the absorbent core at the central center, the outer edge of the absorbent core at the center is not pulled toward the wearable article and easily stands up against the wearable article. By raising the outer edge of the absorbent core at the center, a wall covering the side of the excretion port is formed, and side leakage can be suppressed.

According to a preferred embodiment, the article has a wing that is folded back toward the non-skin side of the worn article when worn, and in the central region, the outer edge of the absorbent core is located inside the wing in the width direction. good.

According to this aspect, the absorbent core in the central region is not folded back to the non-skin surface side together with the wings, making it easier to stand up against the worn article. By raising the outer edge of the absorbent core in the central region, a wall covering the sides of the excretion port is formed, and lateral leakage can be suppressed.

According to a preferred aspect, the skin sheet includes a top sheet and a pair of side sheets that cover the outer side of the top sheet in the width direction, and each of the pair of side sheets includes a pair of side sheets. A leakage prevention wall is configured, and the leakage prevention wall includes a standing portion that can stand up with respect to the top sheet, and a width fulcrum portion that serves as a standing fulcrum for the standing portion outside the upstanding portion in the width direction. , and the leakage prevention wall may be located outside the bending base portion in the width direction.

According to this aspect, the leakage prevention wall that covers the sides of the excretion port is formed on the outside in the width direction from the bending base portion, so that side leakage can be suppressed. Therefore, when body fluid diffuses to the outside in the width direction from the bending base point, the body fluid can be absorbed by the absorption core outside the bending base point in the width direction, and lateral leakage can be suppressed by the leakage prevention wall.

According to a preferable aspect, an outer edge of the absorbent core at the central center portion may be located on an outer side in the width direction than the width fulcrum portion.

According to this aspect, when the body fluid is not drawn in quickly by the absorbent core or when the absorption capacity of the absorbent core is exceeded, the body fluid remains on the skin sheet and is transmitted to the outside in the width direction. At this time, the width fulcrum part, which is the fulcrum of the upright part of the leakage prevention wall, may be reached. This diffusion of body fluids tends to occur in the central region where body fluids are easily led. Since the outer edge of the absorbent core at the center is located on the outer side in the width direction than the width fulcrum, even if body fluid reaches the width fulcrum, the absorbent core can absorb the body fluid that has reached the width fulcrum, suppressing side leakage. can.

According to a preferred aspect, the outer edge of the absorbent core has a pair of first constricted portions that are arranged at intervals in the width direction and extend inward in the width direction, and the first constricted portions include: , may be arranged on the rear side of the central center.

According to this aspect, when the wearer makes a relatively large movement, a force that tends to twist the absorbent article, particularly in the rear region, acts on the absorbent article. At this time, the pair of first constricted portions absorbs the twist in the rear region, making it difficult for the twist to be transmitted to the central center. Therefore, it is possible to ensure a good fit to the excretion port at the center and to suppress side leakage.

According to one preferable aspect, the first constricted portion may be located in front of the rear end edge of the central region.

According to this aspect, the force directed inward in the width direction applied to the central region can be divided by the first constricted portion, and the rear region can be arranged along the buttocks. In addition, the force from the rear region can be divided by the first constriction, making it difficult for the force applied to the rear region to be applied to the center center, ensuring the widthwise length of the absorbent core at the center, and reducing the lateral Leakage can be suppressed.

According to a preferred aspect, the outer edge of the absorbent core has a pair of second constricted portions that are arranged at intervals in the width direction and extend inward in the width direction, and the second constricted portions include: , may be arranged on the front side of the central center.

According to this aspect, the force from the front side region can be divided by the second constricted portion, the force applied to the front side region is less likely to be applied to the center center, and the length in the width direction of the absorbent core at the center center is ensured, Side leakage can be suppressed.

According to a preferred aspect, the bending base portion may have a curved shape that bulges inward in the width direction from the central end toward the central center.

Since it has a curved shape that bulges inward in the width direction from the central end toward the central center, it is easy to transmit the force directed inward in the width direction between the bending base parts at the central center. The area in between can easily bulge out toward the body, and the fit to the excretory opening can be further improved.

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

In addition, in the description of the following drawings, the same or similar parts are given the same or similar symbols. 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 etc. should be determined with reference to the following explanation. Furthermore, the drawings may include portions with different dimensional relationships and ratios.

FIG. 1 is a plan view of the absorbent article seen from the skin side in the embodiment. FIG. 2 is a plan view of the absorbent article seen from the non-skin side in the embodiment. FIG. 3 is a cross-sectional view taken along line AA shown in FIG. Here, the "skin side" corresponds to the side facing the wearer's skin during use. "Non-skin side" corresponds to the side that is turned away from the wearer's skin during use. In addition, in the cross-sectional view of FIG. 3, for convenience of explanation, the constituent members constituting the absorbent article are spaced apart in the thickness direction. However, in an actual product, the constituent members are in contact with each other in the thickness direction, and a depression is formed by the compressed portion.

The absorbent article may be a sports absorbent article. Absorbent articles for sports are absorbent articles suitable for sports. Here, the absorbent article for sports is an absorbent article that meets at least one of the following 1 to 3. 1. At least one of the absorbent article itself, the packaging sheet that wraps the absorbent articles individually, and the package containing multiple absorbent articles is for sports, or has text or designs reminiscent of sports. Absorbent articles. 2. Absorbent articles that indicate that they are for sports use in promotional tools (advertisements, sales promotion materials) for absorbent articles. 3. An absorbent article that can be used without discomfort during movements unique to sports that are not performed in normal life. For example, absorbent articles with flexibility that do not inhibit sports movements such as large leg movements. A durable absorbent article that can be used without damaging the absorbent core or absorbent article even during long-term sports such as running for long periods of time. An absorbent article that does not twist or shift even when the wearer sweats, and does not feel uncomfortable when worn. The present embodiment has a function display pattern reminiscent of sports, and is configured to absorb twisting during sports by the compressed portion forming the function display pattern, so that it can be used without discomfort during sports.

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

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

Wings 3, which will be described later, may be provided in the central region S3. The front edge 3F of the wing 3 is defined by the base of the wing 3, and corresponds to the part located on the front side of the two parts recessed inward in the width direction W. The front edge 3F of the wing 3 may define the boundary between the central region S3 and the front region S1. The rear end edge 3R of the wing 3 is defined by the base of the wing 3, and corresponds to the portion located on the rear side of the two portions recessed inward in the width direction W. The rear edge 3R of the wing 3 may be located between the central region S3 and the rear region S2. Here, the area between the front edge of the wing 3 and the rear edge of the wing 3 in the longitudinal direction L is referred to as a "wing area." Further, the inner edge of the wing is the root of the wing, and is an imaginary line FL1 (see FIG. 1) that connects the front edge 3F of the wing 3 and the rear edge 3R of the wing 3.

Further, in an absorbent article having wings, the central region S3 is substantially the same region as the wing region. Therefore, it should be noted that in this specification, the term "central region S3" can be read as "wing region." Further, in the case of an absorbent article that does not have wings, the central region S3 may be the middle region obtained by dividing the absorbent core 30 into three equal parts in the front-rear direction L, or the In the case of an article, it may be a region having a high basis weight portion 33.

The center region S3 has a center center portion S31 including a center center line S3CL, and a center end portion S32 located outside the center center portion S31 in the front-rear direction L. The central center line S3CL is a line passing through the center of the central region S3 in the front-rear direction L and extending in the width direction W. The center center portion S31 is a region that includes the center center line S3CL and has a certain range in the front-rear direction from the center center line S3CL. The center end portion S32 is configured by a region having a certain range from the front edge of the center region S3 and a region having a certain range from the rear end edge of the center region S3. The central center portion S31 is sandwiched between the central end portions S32 in the front-rear direction. The central center portion S31 is configured by a region located at the center of the regions divided into three equal parts in the rearward direction of the central region S3. Alternatively, a region provided with a wing joint portion 62, which will be described later, may be set as the center center portion S31, and an area outside the center center portion S31 in the front-rear direction may be set as the center end portion S32.

The absorbent article 1 has a skin sheet 10, a non-skin sheet 20, and an absorbent core 30. The skin sheet 10 is provided closer to the skin T1 than the absorbent core 30. The non-skin sheet 20 is provided on the non-skin 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 through, and is made of any sheet-like material that has a structure that allows liquids to pass through, such as nonwoven fabric, woven fabric, perforated plastic sheet, mesh sheet, etc. be done. Further, the skin sheet 10 may include a top sheet 11 that covers the center of the absorbent core 30 in the width direction, and a side sheet 12 that covers the outer side of the top sheet 11 and extends outward from the top sheet 11 in the width direction. . The top sheet 11 covers at least the center of the absorbent core 30 in the width direction W, and the side sheets 12 cover the outer side of the top sheet 11 in the width direction W, and may extend further outward than the top sheet 11 in the width direction W. . For the side sheet 12, a hydrophobic sheet may be used from the viewpoint of leakage prevention. A second sheet may be arranged between the skin sheet and the absorbent core (or core wrap).

Note that the outer portion in the present invention is a portion occupying a certain range in the width direction W including the outer edge in the width direction W, and the outer edge is the outer edge in the width direction W. The inner part in the present invention is a part occupying a certain range in the width direction W including the inner edge in the width direction W, and the inner edge is the inner edge in the width direction W. Further, the front end portion and the rear end portion in the present invention are portions occupying a certain range in the front-rear direction L including the edge in the front-rear direction L, and the front end edge and the rear end edge are edges in the front-rear direction L. The outer end includes a front end and a rear end.

The side sheet 12 may constitute a leakage prevention wall 65. The leakage prevention wall 65 can suppress side leakage. The leakage prevention wall 65 has a standing portion 66 that can stand up against the topsheet 11 and a width fulcrum portion 67 that serves as a standing fulcrum for the standing portion 66 on the outside of the standing portion 66 in the width direction W. good. The upright portion 66 is formed by a portion of the inner side of the side sheet 12 that is not joined to the top sheet 11. The upright portion 66 may include a leak-preventing expandable member that expands and contracts in the front-rear direction. The width fulcrum portion 67 serves as an upright fulcrum for the upright portion 66, and is constituted by a portion where the side sheet 12 is joined to the top sheet 11. According to such a configuration, the side sheet 12 starts from the width fulcrum portion 67 joined to the top sheet 11, and the upright portion where the side sheet 12 can stand up from the top sheet 11 (from the top sheet 11). (the unjoined portion) 66 can stand up. In addition, the leakage prevention wall 65 may have a front-back fulcrum portion 68 that serves as a fulcrum for raising the upright portion 66 on the outer side of the upright portion 66 in the front-rear direction.

The non-skin surface sheet 20 is a liquid-impermeable sheet. The non-skin sheet 20 may be a polyethylene sheet, a laminated nonwoven fabric mainly made of polypropylene, a breathable resin film, spunbond, or a sheet in which a breathable resin film is bonded to a nonwoven fabric such as spunlace. can.

The absorbent core 30 is arranged at least in the central region S3 and the rear region S2. Moreover, the absorbent core 30 may also be arranged in the front region S1. The absorbent core 30 is laminated with absorbent material that absorbs liquid, and may be covered by a core wrap (not shown). The absorbent material that makes up the absorbent core 30 can be formed from, for example, hydrophilic fibers, pulp, and super absorbent polymers (SAP).

Absorbent core 30 may include thermoplastic resin fibers. The core wrap can be made of, for example, nonwoven fabric or tissue. The core wrap may be disposed on the skin side T1 relative to the absorbent core 30 and on the non-skin side T2 relative to the absorbent core 30, respectively. Alternatively, the absorbent core 30 may not have a core wrap. In this case, the absorbent core 30 only needs to be covered by the skin sheet 10 and the non-skin sheet 20. The absorbent core 30 will be described in detail later.

As mentioned above, the absorbent article 1 has the wings 3. The wings 3 extend outward in the width direction W from the outer edge of the absorbent core 30 in the central region S3. The wing 3 may be configured by laminating a skin sheet 10 and a non-skin sheet 20. The wing 3 is configured to be foldable toward the non-skin sheet 20 side. When in use, the wings 3 are folded back to the non-skin side of the crotch portion of the underwear as a worn article.

In variations, the absorbent article may have a hip flap. Like the wing 3, the hip flap extends outward in the width direction W from the outer edge of the absorbent core 30 in the central region S3, and may be configured by laminating the skin sheet 10 and the non-skin sheet 20. The hip flap may be located on the rear side of the wing 3 and provided in the rear region S2. The hip flap is not folded back in use and is placed between the underwear and the wearer's buttocks. The hip flap may be provided with no absorbent material or may be provided with absorbent material.

As shown in FIG. 2, the absorbent article 1 has a joint portion provided with an adhesive for joining the absorbent article 1 to a wearing article such as underwear. The joint portion may include a main body joint portion 61 located in a region overlapping with the absorbent core 30 and a wing joint portion 62 located on the wing 3 . The main body joint portions 61 extend in the front-rear direction L and are arranged at intervals in the width direction W. The main body joints 61 are not arranged at the article width center line 1WC, which is the center of the absorbent article in the width direction W, but are arranged in a plurality of rows on both sides of the article width center line 1WC in the width direction W. Here, the article width center line 1WC is a line passing through the center of the absorbent article in the width direction W and extending in the front-rear direction L. Specifically, the main body joining portions 61 are arranged in eight rows on each side of the width direction W of the article width center line 1WC. The length of the main body joint 61 located in the outermost row in the width direction W in the front-rear direction may be longer than the length of the other main body joints 61 in the front-rear direction. These joints are provided on the non-skin side of the non-skin sheet 20. The joint portion may be covered with a covering sheet before use. The covering sheet prevents deterioration of the adhesive at the joints before use and is removed by the wearer when the absorbent article is used.

At least in the central region S3 of the absorbent article 1, a pair of bending base portions 71 are provided that extend in the front-back direction across the center of the width direction W of the absorbent article. The bending base portion 71 may be provided only in the central region S3, may straddle the front region S1, or may straddle the rear region S2. The bending base point portion 71 may straddle at least the central center line S3CL, and may be provided not in the entire area in the front-back direction of the center region S3 but in a part of the region in the front-back direction. The front edge 71F of the bending base portion 71 of the present embodiment is located on the rear side of the front edge of the center region S3, and the rear edge 71R of the bending base portion 71 is located further back than the rear edge of the center region S3. may also be located on the front side.

The bending reference points 71 are spaced apart in the width direction W from the article width center line 1WC, and are arranged in pairs with the article width center line 1WC in between. The bending base portion 71 extends in the front-rear direction L. Note that the bending base portion 71 only needs to extend at least in the front-back direction, and may be parallel to the front-back direction L or may be inclined with respect to the front-back direction L. The bending base portion 71 may have a curved shape that bulges inward in the width direction W in a plan view, or may have a curved shape that bulges outward in the width direction W. The bending base portion 71 may be constituted by an aggregate of a plurality of point-like portions, or may be linear.

The bending base portion 71 functions as a deformation base of the absorbent article. The bending base point part 71 may be any base point of deformation due to a difference in rigidity, a difference in thickness, a difference in basis weight of the absorbent core, etc., and specifically, a compression part that compresses at least the absorbent core in the thickness direction. , a low basis weight part where the basis weight of the absorbent core is lower than the surrounding area, a high basis weight part where the basis weight of the absorbent core is higher than the surrounding area, a low thickness area where the absorbent core thickness is thinner than the surrounding area, and a low thickness area where the absorbent core thickness is lower than the surrounding area. It can be configured by at least one of a high thickness part that is thicker than the surrounding area, or a combination thereof.

FIG. 4 is an enlarged view of portion B in FIG. The bending base point part 71 of this embodiment is configured by a bending and pressing part 81 as a pressing part 80 . In the folding and pressing portion 81, the absorbent core 30 and the top sheet 11 as a skin sheet are compressed in the thickness direction. The folding compression section 81 may be configured by an assembly of a low compression section 81L and a high compression section 81H having a stronger degree of compression than the low compression section 81L. The depth of the low compression section 81L is shallower than the depth of the high compression section 81H. That is, the degree of compression in the low compression section 81L is weaker than the degree of compression in the high compression section 81H.

The bending base portion 71 may overlap the absorbent core 30. Preferably, it functions as a deformation reference point for the absorbent core. The outer edge 30E of the absorbent core 30 is located on the outer side in the width direction W than the bending base part 71, and the outer edge 30E of the absorbent core 30 and the bending base part 71 are spaced apart in the width direction W. . Therefore, the absorbent cores are disposed in a region outside the bending base portion 71 in the width direction W and in a region sandwiched between the bending base portions 71.

The pressing section 80 may include a front pressing section 82 , a rear pressing section 83 , a side pressing section 85 , and a central pressing section 86 in addition to the bending pressing section constituting the bending base point section 71 . . In the front compression section 82, the rear compression section 83, the side compression section 85, and the central compression section 86, at least the absorbent core is compressed in the thickness direction, and the skin sheet and the absorption core are compressed in the thickness direction. Good too.

As shown in FIG. 1, the front compressing part 82 may be located in front of the bending base part 71 and may be disposed astride the front area S1 and the central area S3. The rear compression section 83 may be located on the rear side of the bending base point section 71 and may be disposed astride the rear region S2 and the central region S3. Each of the front pressing section 82 and the rear pressing section 83 has an _X- shape having a first line and a second line that intersects with the first line at the intersection, and has an extending section extending in all directions from the intersection. may have.

The side compressing portions 85 have a curved shape in plan view, and are provided in plurality at intervals. The side compressed portion 85 may have a linear shape in which a convex shape that swells inward in the width direction W and a convex shape that swells outward in the width direction W are continuous in the front-rear direction. The side compressing portion 85 may be provided mainly on the outer side of the bending base portion 71 in the width direction W, on the front side of the front compressing portion 82 , and on the rear side of the rear compressing portion 83 . The side compressed portion 85 may also be provided in a region overlapping each of the bending base point portion 71, the front compressed portion 82, and the rear compressed portion 83. The side compressed portion 85 may extend further inward in the width direction W than the bending base portion 71 , may extend toward the rear side than the front compressed portion 82 , or may extend further than the rear compressed portion 83 . It may extend to the front.

The central pressing portion 86 is provided in a region sandwiched between the pair of bending base portions 71 . A plurality of central compressing portions 86 are arranged in a dot shape at intervals in the front-rear direction and the width direction W. The central pressing section 86 may be provided in the region where the high basis weight section 33 is arranged. The depth of the central compressed portion 86 may be deeper than at least the side compressed portions 85. That is, the bottom surface of the central pressing section 86 may be located closer to the non-skin surface side T2 than the bottom surface of the side pressing section 85. According to this configuration, when the central region S3 fits into the vaginal opening, the central compressing portion 86 easily draws body fluids such as menstrual blood toward the absorbent core 30 side.

(3) Detailed configuration of absorbent core Next, with reference to FIG. 5, the configuration of the absorbent core 30 will be described in more detail. FIG. 5 is a plan view of the absorbent core 30. The length of the absorbent core 30 in the width direction W varies in the front-rear direction. The maximum width WMS3 of the absorbent core 30 in the central region S3 is longer than the maximum width WMS1 of the absorbent core 30 in the front region S1. When the absorbent article 1 is pinched by the wearer's legs when worn, a force is applied to the front region S1 and the central region S3 from the outside in the width direction W to the inside in the width direction W. At this time, the center region S3 is more susceptible to the force of the wearer's legs than the front region S1, and the length in the width direction W is likely to be shorter. However, since the maximum width WMS3 of the absorbent core 30 in the central region S3 is longer than the maximum width WMS1 of the absorbent core 30 in the front side region S1, it is easy to secure the length in the width direction W of the absorbent core 30 in the central region S3, and Leakage can be suppressed.

Note that the maximum width WMS3 of the absorbent core 30 in the central region S3 may be the same as the maximum width WMS2 of the absorbent core in the rear region, or may be shorter than the maximum width of the absorbent core in the rear region S2. . The absorbent core of the rear region S2 is arranged so as to cover the buttocks, and may be provided relatively widely. In addition, the absorbent core in the rear region S2 is less susceptible to the force of being pinched by the wearer's legs when worn, and is less likely to be deformed by the force of being pinched by the wearer's legs, unlike the front and central regions. .

Further, the outer edge 30E of the absorbent core 30 in the central region S3 may have a convex shape that swells outward in the width direction W, and the outer edge 30E of the absorbent core 30 in the center center portion S31 is the same as that of the absorbent core 30 in the central end S32. 30 may be located on the outer side in the width direction W than the outer edge 30E of 30. Note that, in at least a portion of the central center portion S31, the outer edge 30E of the absorbent core 30 only needs to be located on the outer side in the width direction W than the outer edge 30E of the absorbent core 30 at the center end portion S32. The maximum width WMS3 of the absorbent core 30 in the central region S3 may be located on the central center line S3CL. The force directed inward in the width direction W is most likely to be applied to the center center portion S31 within the center region S3. By ensuring the length of the absorbent core 30 in the width direction W at the central center portion S31, lateral leakage can be further suppressed.

As shown in FIG. 1, the distance in the width direction W between the outer edge 30E of the absorbent core and the bending base point 71 may change in the front-rear direction. The distance G11 in the width direction W between the outer edge 30E of the absorbent core 30 and the bending base part 71 at the central center part S31 is the distance G12 in the width direction between the outer edge 30E of the absorbent core and the bending base part 71 at the central end S32. , longer than G13. The distance G11 is the distance between the outer edge 30E of the absorbent core 30 and the outer edge of the bending base portion 71 at the central center S31. G12 is the distance between the outer edge 30E of the absorbent core and the outer edge of the bending base point 71 at the center end S32 located on the front side of the central center S31. G13 is the distance between the outer edge 30E of the absorbent core and the outer edge of the bending base point 71 at the center end S32 located on the rear side of the central center S31. G11 may vary within the central center S31, and G12 and G13 may vary within the central edge S32. In the case where G11, G12, and G13 change, it is sufficient that the maximum value of G11 is longer than the maximum value of G12, and the maximum value of G11 is longer than the maximum value of G13. Furthermore, G12 and G13 may be different.

The distance in the width direction W between the outer edge 30E of the absorbent core 30 and the bending base point part 71 may become longer toward the central center line S3CL. In this embodiment, the outer edge 30E of the absorbent core 30 has a curved shape that bulges outward in the width direction W from the center end S32 toward the center center S31, and the bending base point 71 extends from the center end S32 to the center center S31. It has a curved shape that swells inward in the width direction W toward the center center S31. These configurations realize G11>G12 and G11>G13.

Another configuration for realizing G11>G12 and G11>G13 is that the outer edge 30E of the absorbent core 30 has a curved shape that bulges outward in the width direction W from the center end S32 toward the center center S31, and is folded. A configuration in which the bending base point 71 is parallel to the front-back direction, and both the outer edge 30E of the absorbent core 30 and the bending base point 71 swell outward in the width direction W from the center end S32 toward the central center S31. An example may be a configuration in which the bending base portion 71 has a curved shape and the bending base portion 71 expands more gently.

Furthermore, in order to further ensure the length in the width direction W of the absorbent core 30 in the central center portion S31, the maximum width WMS3 of the absorbent core 30 in the central region S3 is provided over a certain range extending in the front-rear direction L. good. When a force directed inward in the width direction W is applied, widening is more easily suppressed, and side leakage can be suppressed. The outer edge of the absorbent core 30 at the central center portion S31 of this embodiment extends in parallel along the front-rear direction L from the central center line S3CL.

As shown in FIG. 5, the outer edge 30E of the absorbent core 30 is provided with a constricted portion 90 that is constricted inward in the width direction W. As shown in FIG. The constricted portion includes a first constricted portion 91 located on the rear side of the central center portion S31, and a second constricted portion 92 located on the front side of the central central portion S31. The first constricted portion 91 and the second constricted portion 92 are arranged as a pair with the article width center line 1WC sandwiched therebetween and spaced apart from each other in the width direction W. The constricted portion 90 is formed by a cutout portion of the absorbent core 30 or a thin portion that is thinner than other portions of the absorbent core 30 . In the illustrated example, it is configured by a part of the absorbent core 30 that is cut out. Note that the shape of the constricted portion can be changed as necessary.

The first constricted portion 91 extends inward in the width direction W from the outer edge 30E of the absorbent core 30. The first constricted portion includes an inner end (tip) 91A located at the inner edge in the width direction, a first rear edge 91C extending rearward from the inner end 91A, and a first front edge 91B extending frontward from the inner end 91A. , a rear outer end 91E that is the intersection of the first rear edge 91C and the outer edge 30E of the absorbent core, and a front outer end 91D that is the intersection of the first front edge 91B and the outer edge 30E of the absorbent core. The inner end (tip) 91A is biased toward the front of the center of the first constricted portion 91 in the front-rear direction. The length of the first front edge 91B in the front-rear direction is shorter than the length of the first rear edge 91C in the front-rear direction. The length of the first constricted portion 91 in the front-rear direction L becomes shorter toward the inside in the width direction W.

The second constricted portion 92 extends inward in the width direction W from the outer edge 30E of the absorbent core 30. The second constricted portion 92 includes an inner end (tip) 92A located at the inner edge in the width direction, a second rear edge 92C extending rearward from the inner end 92A, and a second front edge extending frontward from the inner end 92A. 92B, a rear outer end 92E that is the intersection of the second rear edge 92C and the outer edge 30E of the absorbent core, and a front outer end 92D that is the intersection of the second front edge 92B and the outer edge 30E of the absorbent core, have The inner end (tip) 92A is biased toward the rear of the center of the second constricted portion 92 in the front-rear direction. The length of the second front edge 92B in the front-rear direction is longer than the length of the second rear edge 92C in the front-rear direction. The length of the second constricted portion 92 in the front-rear direction becomes shorter toward the inside in the width direction W.

The basis weight of the absorbent core 30 may be constant or may be partially different. The absorbent core 30 may be provided with a high basis weight portion 33 having a higher basis weight than the surrounding absorbent cores 30 . The high basis weight portion 33 of this embodiment is a region where the basis weight of the absorbent core is T higher than the region outside the bending base point portion 71 in the width direction W. The high basis weight portion 33 may be provided in at least a portion of the region sandwiched between the pair of bending base portions 71 .

(4) Deformation when worn Next, the deformation when worn will be described based on FIGS. 6 to 8. FIG. 6 is a perspective view schematically showing a state in which the absorbent article is attached to underwear S as a wearable article. 7 and 8 show the wearing condition based on the cross section shown in FIG. 3. 7 shows a state in which no force is applied inward in the width direction W, and FIG. 8 shows a state in which a force directed inward in the width direction W is applied. The absorbent article of the present embodiment is configured to ensure fit to the excretion port while suppressing lateral leakage in the central region S3.

When the central region S3 is pinched by the wearer's legs when worn, a force is applied to the central region S3 from the outside in the width direction W to the inside in the width direction W. At this time, the absorbent article deforms with the bending base portion 71 as a base point. The region sandwiched by the bending base portions 71 of the central region S3 is deformed so as to bulge toward the wearer, and fits into the excretion opening.

The center region S3 is more susceptible to the force of the wearer's legs than the front region, and the length in the width direction W is likely to be shorter. However, since the maximum width WMS3 of the absorbent core in the central region S3 is longer than the maximum width WMS1 of the absorbent core in the front side region S1, it is easy to ensure the length in the width direction W of the absorbent core in the central region S3, and lateral leakage is suppressed. can.

Also, within the center region S3, the center center portion S31 is most susceptible to the force of the wearer's legs, and the length in the width direction W is likely to be shortened. Furthermore, the central center portion S31 is more likely to be disposed near the excretion port than the central end portion S32, and body fluids are more likely to be guided thereto. However, since the distance between the outer edge 30E of the absorbent core 30 and the bending base part 71 at the center center part S31 is relatively long, body fluids may leak in the area outside the bending base part 71 in the width direction W at the center center part S31. Even if the body fluid is guided, the absorbent core located outside the bending base point 71 in the width direction W can absorb the body fluid and suppress lateral leakage. On the other hand, the center end portion S32 is more likely to be disposed away from the excretion port than the central center portion S31, and body fluids are less likely to be guided thereto. Therefore, even if the distance between the outer edge 30E of the absorbent core 30 and the bending base point 71 at the central end S32 is relatively short, side leakage of body fluid can be suppressed. Therefore, while ensuring the fit of the region sandwiched by the bending base portions 71 to the excretion port, it is possible to suppress lateral leakage in the central region S3.

The outer edge 30E of the absorbent core 30 at the central center portion S31 may be located on the outer side in the width direction W than the outer edge 30E of the absorbent core 30 at the center end portion S32. Even within the center region S3, the center center portion S31 is most susceptible to the force of the wearer's legs, and the length in the width direction W is likely to be shortened. However, the outer edge 30E of the absorbent core 30 at the center center S31 is located on the outer side in the width direction W than the outer edge 30E of the absorbent core 30 at the center end S32, and It is easy to ensure the length, and side leakage can be suppressed.

The bending base portion 71 may have a curved shape that bulges inward in the width direction W from the central end portion S32 toward the central center portion S31. Since it has a curved shape that bulges inward in the width direction W from the center end S32 toward the center center S31, it is easy to transmit the force directed inward in the width direction W between the bending base points 71 at the center center S31, The region between the bending base portions 71 is more likely to swell toward the body, and the fit to the excretory opening can be further improved.

The bending base point part 71 may be configured by a bending pressing part 81. The folded and compressed portion 81 has a difference in rigidity and thickness compared to the surrounding area, and tends to serve as a deformation base point. In addition, the folded and compressed portion 81 has a higher density than the surrounding area, and easily draws in body fluids. Therefore, while the body fluid that has reached the bending base point 71 is diffused in the front-rear direction L, it is made difficult to diffuse outward in the width direction W from the bending base point 71, and lateral leakage can be further suppressed.

As shown in FIG. 6, the deepest part DM85 of the side compressed part 85 in the thickness direction may be located closer to the skin surface side T1 than the deepest part DM81 of the folded compressed part 81 in the thickness direction. That is, the degree of compression of the side compressing portion 85 may be weaker than the degree of compression of the bending compressing portion 81. According to this configuration, the rigidity of the area outside the bending base part 71 in the width direction W is increased by the side compressing part 85, and when pinched by the legs, the area outside the bending base part 71 in the width direction W is increased. It is possible to prevent the area from becoming too wide. Therefore, the length in the width direction W of the region outside the bending base point portion 71 in the width direction W can be ensured, and lateral leakage can be suppressed. Further, since the region outside the bending base point portion 71 in the width direction W is compressed to a weak degree by the side compressing portions 85, the rigidity does not become too high, and discomfort when touching the leg can be suppressed.

In addition, in the form in which the folding compression part 81 has the high compression part 81H and the low compression part 81L, the deepest part DM85 of the side compression part 85 is located on the skin surface side T1 rather than the deepest part of the high compression part 81H. The deepest part DM85 of the side compressed part 85 may be the same depth as the deepest part of the low compressed part 81L on the non-skin surface side or in the thickness direction.

The high basis weight portion 33 may be provided in the region sandwiched between the pair of bending base portions 71 . The high basis weight portion 33 increases the body fluid absorption capacity in the region between the pair of bend base points 71, reduces the body fluid that reaches the area outside the bend base point portions 71 in the width direction W, and prevents side leakage. It can be controlled more. Further, the high basis weight portion 33 increases the thickness of the region between the pair of bending base portions 71, so that the fit of the region between the pair of bending base portions 71 to the excretion opening can be improved. In addition, the high basis weight portion 33 increases the rigidity of the region between the pair of bending base portions 71, suppressing unintentional twisting or bending when a force directed inward in the width direction W is applied, and improving fit. Can be secured.

A central compressed portion 86 may be provided in the region sandwiched between the pair of bending base portions 71 . According to this configuration, the ability to draw body fluids in the area between the pair of bending base points 71 is enhanced, the body fluid reaching the area outside the bending base points 71 in the width direction W is reduced, and side leakage is prevented. It can be controlled more. In addition, the central compressed portion 86 increases the rigidity of the region between the pair of bending base portions 71, suppressing unintentional twisting or folding when force is applied inward in the width direction W, and ensuring a good fit. can.

The main body joint portion 61 may be arranged in a region that does not overlap with the outer edge 30E of the absorbent core 30 in the central center portion S31. The main body joint portion 61 may be arranged on the inner side in the width direction W than the outer edge 30E of the absorbent core 30 in the central center portion S31. The force when being pinched by the wearer's legs is likely to be applied to the center center S31, and particularly to the outer edge 30E of the absorbent core 30 at the center center S31. At this time, since the main body joining portion 61 does not overlap the outer edge 30E of the absorbent core 30 at the center center S31, the outer edge 30E of the absorbent core 30 at the center center S31 is not pulled toward the wearable article and is attached to the wearable article. It becomes easier to stand up. By raising the outer edge 30E of the absorbent core 30 at the central center S31, a wall covering the side of the excretion port is formed, and side leakage can be suppressed.

In the central region S3, the outer edge 30E of the absorbent core 30 may be located inside the wings 3 in the width direction W. That is, the outer edge 30E of the absorbent core is spaced apart from the inner edge of the wing (imaginary line FL1) and is located on the inner side of the inner edge of the wing in the width direction W. According to this configuration, the absorbent core 30 in the central region S3 is not folded back to the non-skin surface side together with the wings 3, and it becomes easier to stand up against the worn article. By raising the outer edge 30E of the absorbent core 30 in the central region S3, a wall covering the sides of the excretion port is formed, and lateral leakage can be suppressed.

The leakage prevention wall 65 may be located outside the bending base point 71 in the width direction W. That is, the inner edge of the upright portion constituting the inner edge of the leakage prevention wall 65 may be located on the outer side of the bending base portion 71 in the width direction W. In addition, in the form having a leak-proof elastic member, when the absorbent article is stretched until no wrinkles are formed in the leak-preventing elastic member, the leak-preventing wall is wider than the bending base portion 71 in the width direction W. It only needs to be located on the outside. According to this configuration, the leakage prevention wall that covers the sides of the excretion port is formed outside the bending base portion 71 in the width direction W, and lateral leakage can be suppressed. Therefore, when body fluid diffuses to the outside of the bending base point 71 in the width direction W, the body fluid is absorbed by the absorption core outside the bending base point 71 in the width direction W, and the leakage prevention wall prevents side leakage. can be suppressed.

The outer edge 30E of the absorbent core 30 at the central center portion S31 may be located on the outer side in the width direction W than the width fulcrum portion 67. When the body fluid is not drawn in quickly by the absorbent core 30 or when the absorption capacity of the absorbent core 30 is exceeded, the body fluid remains on the skin sheet 10 and is transmitted to the outside in the width direction W. At this time, the width fulcrum portion 67, which is the fulcrum of the upright portion of the leakage prevention wall, may be reached. This diffusion of body fluids tends to occur in the central portion S31 where body fluids are easily guided. Since the outer edge 30E of the absorbent core 30 at the central center S31 is located on the outer side of the width fulcrum 67 in the width direction W, even if body fluid reaches the width fulcrum 67, the reached body fluid is not absorbed by the absorbent core 30. It can be absorbed and suppress side leakage. Note that the outer edge 30E of the absorbent core 30 may be located on the outer side in the width direction W than the width supporting point 67 in at least a portion of the central center portion S31, but more preferably, the outer edge 30E of the absorbent core 30 It may be located on the outer side of the width direction W than the width fulcrum part 67 in the entire area in the front-rear direction.

The first constricted portion 91 may be arranged on the rear side of the central center portion S31. When the wearer makes a relatively large movement during sports or the like, a force that tends to twist the absorbent article is applied particularly to the rear region S2. At this time, the pair of first constricted portions 91 absorbs the twisting of the rear region S2, making it difficult for the twisting to be transmitted to the central central portion S31. Therefore, it is possible to both ensure a good fit to the excretion port in the central portion S31 and suppress side leakage.

Moreover, the rear compression part 83 may be provided on the rear side of the central center part S31. The rear compression part 83 is _X -shaped in plan view. The _X- shaped base point allows it to deform, absorb twisting, and release force in all directions along the extension. The rear compression section 83 also absorbs the twisting of the rear side region S2, making it difficult for the twisting to be transmitted to the central center section S31. Therefore, it is possible to both ensure a good fit to the excretion port in the central portion S31 and suppress side leakage.

The first constricted portion 91 may be located in front of the rear edge of the central region S3. The force directed inward in the width direction W applied to the central region S3 can be divided by the first constricted portion 91, and the rear region S2 can be arranged along the buttocks. In addition, the force from the rear side region S2 can be divided by the first constricted portion 91, and the force applied to the rear side region S2 is less likely to be applied to the center center portion S31, and the force in the width direction W of the absorbent core 30 at the center center portion S31 is reduced. The length can be secured and side leakage can be suppressed.

The second constricted portion 92 may be arranged on the front side of the central center portion S31. Since the second constricted portion 92 is provided in front of the center center portion S31, the deformation base point of the absorbent core 30 is formed in front of the center center portion S31. Generally, in a cross section along the front-rear direction L of the body, the front side of the excretory opening has a curved shape with a steeper slope than the rear side, making it difficult for the absorbent core 30 to follow the body. However, the second constricted portion 92 forms a base point for the deformation of the absorbent core 30 in front of the excretion port, making it easier for the area in front of the excretion port to conform to the body. Absorption of body fluids becomes higher in the area in front of the excretion port, and as a result, less body fluid diffuses outward in the width direction W from the excretion port, and lateral leakage can be reduced. Further, the force from the front side region S1 can be divided by the second constricted portion 92, and the force applied to the front side region S1 is less likely to be applied to the center center portion S31, so that the length in the width direction W of the absorbent core 30 at the center center portion S31 It is possible to secure and suppress side leakage.

Further, the front compressing part 82 may be provided on the front side of the central center part S31. The front compression part 82 is _X -shaped in plan view. The _X- shaped base point allows it to deform, absorb twisting, and release force in all directions along the extension. The front compressed portion 82 also absorbs the twist of the front side region S1, making it difficult for the twist to be transmitted to the central center portion S31. Therefore, it is possible to both ensure a good fit to the excretion port in the central portion S31 and suppress side leakage.

Although the present invention has been described in detail using the embodiments described above, it is clear to those skilled in the art that the present invention is not limited to the embodiments described herein. The present invention can be implemented as modifications and variations without departing from the spirit and scope of the present invention as defined by the claims. Therefore, the description in this specification is for the purpose of illustrative explanation and does not have any limiting meaning on the present invention.

It is possible to provide an absorbent article that can suppress lateral leakage in the central region while ensuring fit to the excretion port in the region sandwiched by the bending base portions.

1 : Absorbent article 3 : Wing 10 : Skin sheet 11 : Top sheet 12 : Side sheet 20 : Non-skin sheet 30 : Absorbent core 30E : Outer edge 33 : High basis weight part 61 : Main body joint part 65 : Leak prevention Wall 66 : Standing part 67 : Width fulcrum part 71 : Bending base part 80 : Squeezing part 81 : Bending squeezing part 81H : High squeezing part 81L : Low squeezing part 82 : Front squeezing part 83 : Back squeezing part 85 : Side squeezing Part 86 : Central compressed part 91 : First constricted part 92 : Second constricted part DM81 : Deepest part of the bent compressed part DM85 : Deepest part of the side compressed part S1 : Front side area S2 : Rear side area S3 : Central area S31 : Center center portion S32: Center end portion

Claims (10)

The front-rear direction and the width direction are orthogonal to each other,
A central area facing the wearer's excretion opening;
a rear region located on the rear side of the central region;
a front region located anterior to the central region;
an absorbent core disposed in at least the central region;
An absorbent article comprising a skin sheet located closer to the skin than the absorbent core,
A pair of bending base portions are provided in the central region and extend in the front-rear direction across the center of the width direction of the absorbent article,
The maximum width of the absorbent core in the central region is longer than the maximum width of the absorbent core in the front region,
The outer edge of the absorbent core is located further outward in the width direction than the bending base point,
The central region has a central center portion including the center of the central region in the front-rear direction, and a central end portion located outside the central center portion in the front-rear direction,
The distance in the width direction between the outer edge of the absorbent core at the center center and the bending base point is the distance between the outer edge of the absorbent core at the center end located on the front side of the center center and the bending point. longer than the distance in the width direction of the base point, and longer than the distance in the width direction between the outer edge of the absorbent core at the central end located on the rear side of the central center and the bending base point;
The outer edge of the absorbent core in the central region has a curved shape that swells outward in the width direction from the central end toward the central center,
In the absorbent article, the maximum width of the absorbent core in the central region is located on a central center line that passes through the center of the central region in the front-rear direction and extends in the width direction. The absorbent core in a region sandwiched between the pair of bending base portions includes a high basis weight portion having a higher basis weight than the absorbent core in a region outside the pair of bending base portions in the width direction. The absorbent article according to claim 1, wherein the absorbent article is provided with an absorbent article according to claim 1 . A joint part is provided for joining the absorbent article to a wearing article,
The joint part has a main body joint part arranged in a region overlapping with the absorbent core,
The absorbent article according to claim 1 or 2 , wherein the main body joint portion is arranged in a region that does not overlap with an outer edge of the absorbent core in the central portion. It has wings that are folded back to the non-skin side of the worn article when worn,
The absorbent article according to any one of claims 1 to 3 , wherein in the central region, an outer edge of the absorbent core is located inside the wings in the width direction. The skin sheet has a top sheet and a pair of side sheets that cover the outer side of the top sheet in the width direction,
Each of the pair of side sheets constitutes a pair of leakage prevention walls,
The leakage prevention wall has an upright portion that can stand up with respect to the top sheet, and a width fulcrum portion that serves as an upright fulcrum for the upright portion outside the upright portion in the width direction,
The absorbent article according to any one of claims 1 to 4 , wherein the leakage prevention wall is located outside the bending base portion in the width direction. The absorbent article according to claim 5 , wherein an outer edge of the absorbent core at the center center portion is located on the outer side in the width direction than the width fulcrum portion. The outer edge of the absorbent core has a pair of first constricted portions that are spaced apart in the width direction and extend inward in the width direction;
The absorbent article according to any one of claims 1 to 6 , wherein the first constricted portion is located on the rear side of the central center portion. The absorbent article according to claim 7 , wherein the first constricted portion is located in front of a rear edge of the central region. The outer edge of the absorbent core has a pair of second constricted portions that are spaced apart in the width direction and extend inward in the width direction;
The absorbent article according to any one of claims 1 to 8 , wherein the second constricted portion is located in front of the central center portion. The absorbent article according to any one of claims 1 to 9 , wherein the bending base portion has a curved shape that swells inward in the width direction from the central end toward the central center. .

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