JP7291668B2 - absorbent article - Google Patents

Description

TECHNICAL FIELD The present invention relates to an absorbent article in which an absorbent core is provided with a core pressing portion.

Patent Literature 1 discloses an absorbent article in which an absorbent core is provided with a core pressing portion. The core compression parts of Patent Document 1 are point-like or linear, and are arranged at intervals in the longitudinal direction and the width direction. The core pressing part is arranged over substantially the entire area of the absorbent core (Figs. 1 and 6 of Patent Document 1).

JP 2014-68745 A

According to the absorbent article of Patent Document 1, the rigidity of the absorbent core can be increased over substantially the entire area of the absorbent core. However, since the rigidity of substantially the entire area of the absorbent core is high, the wearer feels that the absorbent core is hard, which may lead to a decrease in wearing comfort. Therefore, it is conceivable to narrow the range in which the core pressing portion is provided. However, narrowing the area where the core pressing portion is provided may cause problems during manufacturing. More specifically, during the production of absorbent articles, the absorbent core is generally conveyed along the longitudinal direction, and the absorbent articles are conveyed continuously. Since the absorbent core is conveyed at a high speed, narrowing the area where the core compression part is provided reduces the rigidity of the absorbent core, which may cause the absorbent core to turn over or twist during conveyance. could not be transported properly.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and provides an absorbent article capable of appropriately transporting an absorbent core while suppressing deterioration of wearing feeling caused by the rigidity of the absorbent core.

An absorbent article according to one aspect includes a longitudinal direction and a width direction perpendicular to each other, an absorbent core having an absorbent material, and a core compression region provided with a core compression portion obtained by compressing at least the absorbent core in the thickness direction. have. The core compressed area includes a first compressed area arranged at one end in the longitudinal direction of the absorbent core and a second compressed area arranged at the other end in the longitudinal direction of the absorbent core. , have A non-compressed region in which the core compressed portion is not provided is provided between the first compressed region and the second compressed region. The shape of the inner longitudinal edge of the first compressed region is different from the shape of the inner longitudinal edge of the second compressed region.

An absorbent article according to another aspect has a longitudinal direction and a width direction perpendicular to each other, an absorbent core having an absorbent material, and a core compressed portion obtained by compressing at least the absorbent core in the thickness direction. The absorbent article includes a core compressed region provided with the core compressed portion at the longitudinal end of the absorbent core, and a non-core compressed portion not provided inside the core compressed region in the longitudinal direction. and a squeeze area. The basis weight of absorbent material in the core compressed areas is higher than the basis weight of absorbent material in adjacent areas of the uncompressed areas adjacent to the core compressed areas.

FIG. 1 is a plan view of an absorbent article according to an embodiment viewed from the skin side. FIG. 2 is a plan view of the absorbent core according to the embodiment as seen from the skin surface side, and shows the core compression region. FIG. 3 is a plan view of the absorbent core according to the embodiment as seen from the skin surface side, and shows regions where the basis weight of the absorbent material is different.

(1) Overview of Embodiments At least the following matters will become clear from the description of this specification and the accompanying drawings.
An absorbent article according to one aspect includes a longitudinal direction and a width direction perpendicular to each other, an absorbent core having an absorbent material, and a core compression region provided with a core compression portion obtained by compressing at least the absorbent core in the thickness direction. have. The core compressed area includes a first compressed area arranged at one end in the longitudinal direction of the absorbent core and a second compressed area arranged at the other end in the longitudinal direction of the absorbent core. , has A non-compressed region in which the core compressed portion is not provided is provided between the first compressed region and the second compressed region. The shape of the inner longitudinal edge of the first compressed region is different from the shape of the inner longitudinal edge of the second compressed region. According to this aspect, by providing the first compressed area and the second compressed area, the rigidity of the end portions in the longitudinal direction of the absorbent core can be increased. By increasing the rigidity of the ends of the absorbent core in the longitudinal direction, problems during transportation can be suppressed and the absorbent core can be properly transported. In addition, the shape of the inner edge of the first compression region and the shape of the inner edge of the second compression region are different, and the rigidity of one of the first compression region and the second compression region is higher than the rigidity of the other Become. By arranging the side with relatively high rigidity on the downstream side in the transport direction, problems during transport can be further suppressed. In addition, the rigidity of the entire absorbent core can be reduced compared to a configuration in which the rigidity is similarly increased in both the first compression area and the second compression area. In addition, a non-compression area is provided inside the core compression area in the longitudinal direction. The rigidity of the absorbent core can be reduced in the non-squeezed area, and deterioration of wearing comfort can be suppressed. In addition, since the shape of the inner edge of the first compressed area and the shape of the inner edge of the second compressed area are different, the difference in shape can improve the feeling of wearing when the user wears it in an appropriate front-rear direction.

An absorbent article according to another aspect has a longitudinal direction and a width direction perpendicular to each other, an absorbent core having an absorbent material, and a core compressed portion obtained by compressing at least the absorbent core in the thickness direction. The absorbent article includes a core compressed region provided with the core compressed portion at the longitudinal end of the absorbent core, and a non-core compressed portion not provided inside the core compressed region in the longitudinal direction. and a squeeze area. The basis weight of the absorbent material in the core compressed areas is higher than the basis weight of the absorbent material in adjacent areas of the uncompressed areas adjacent to the core compressed areas. According to this aspect, the longitudinal ends of the absorbent core are stiffened by the core squeeze regions and stiffened by the relatively high basis weight. By increasing the rigidity of the ends of the absorbent core in the longitudinal direction, problems during transportation can be suppressed and the absorbent core can be properly transported. In addition, an adjacent region in which the core compressed portion is not provided and the basis weight of the absorbent material is low is provided inside the core compressed region in the longitudinal direction. It is possible to reduce the rigidity of the absorbent core in the adjacent region, thereby suppressing deterioration of wearing comfort.

According to a preferred aspect, the core compression area has a first compression area arranged on one side in the longitudinal direction and a second compression area arranged on the other side in the longitudinal direction. The shape of the inner longitudinal edge of the first compressed region is different from the shape of the inner longitudinal edge of the second compressed region. According to this aspect, the shape of the inner edge of the first compression region and the shape of the inner edge of the second compression region are different, and the rigidity of one of the first compression region and the second compression region is the other Higher than stiffness. By arranging the side with relatively high rigidity on the downstream side in the transport direction, problems during transport can be further suppressed. In addition, the rigidity of the entire absorbent core can be reduced compared to a configuration in which the rigidity is similarly increased in both the first compression area and the second compression area.

According to one preferred aspect, the area of the first compression area is larger than the area of the second compression area. According to this aspect, the area of the first compression region is large, and the rigidity of the first compression region is high. By arranging the first compression area side with relatively high rigidity on the downstream side in the conveying direction, problems during conveying can be further suppressed. In addition, the rigidity of the entire absorbent core can be reduced compared to a configuration in which the rigidity is similarly increased in both the first compression area and the second compression area.

According to a preferred aspect, the core compression region has a bulging compression bulge extending inwardly in the longitudinal direction along the longitudinal direction. The compression bulging portion is provided only in the first compression region out of the first compression region and the second compression region. According to this aspect, the rigidity of the absorbent core can be increased over a wide range in the longitudinal direction in the first compressed region by providing the compressed bulging portion. In addition, since the compression bulging portion is not provided on the second compression region side, the rigidity of the entire absorbent core can be suppressed, and a decrease in wearing comfort can be suppressed.

According to a preferred aspect, the compressed swelling portions are arranged at intervals in the width direction. The non-compression areas are provided between the compression bulges. By providing the compressed bulges at intervals in the width direction, the rigidity of the absorbent core is increased by the compressed bulges, while the non-compressed areas between the compressed bulges ensure flexibility, thereby preventing deterioration of wearing comfort. can be suppressed.

According to one preferred aspect, the first compression area is arranged at the rear end of the absorbent core. The rear end portion of the absorbent article tends to twist under pressure from the buttocks when sitting or the like. By providing the first compression region and the compression bulging portion in the rear side region, the rigidity of the rear side region can be increased, and deformation due to the wearer's pressure can be suppressed. In addition, since the compressed bulging portion extends longitudinally inward along the longitudinal direction, a deformation base point extending in the longitudinal direction is formed in the rear region. Therefore, the rear side region easily conforms to body irregularities due to swelling of the buttocks or the like in a cross section of the body extending in the width direction. The fit of the rear region is improved, and discomfort and leakage when worn can be suppressed.

According to a preferred aspect, at least the absorbent core and the top sheet arranged on the skin surface side of the absorbent core are provided with a main body compressed portion obtained by compressing the absorbent core in the thickness direction. The said main-body compression part overlaps with a part of said compression swelling part. According to this aspect, when body pressure is received from the side, the absorbent article deforms with the main body compressing portion as a base point. At this time, since the body compressed portion overlaps a part of the compressed bulging portion, the compressed bulged portion also serves as a starting point in conjunction with the main body compressed portion, making it easier to induce deformation of the absorbent article. Easy to follow movements. In addition, since the main compressed portion overlaps with a part of the compressed bulging portion, and the main compressed portion does not overlap with the entire compressed bulging portion, it is possible to prevent the stiffness of the absorbent article from becoming too high locally. It is possible to ensure the flexibility of the entire product.

According to a preferred aspect, the body compression part includes a first body compression part arranged closer to the first compression area than the center of the absorbent article in the longitudinal direction, and a center of the absorbent article in the longitudinal direction. and a second body pressing portion disposed closer to the second pressing region than the second pressing region. The shape of the first body pressing portion and the shape of the second body pressing portion are different. According to this aspect, according to the configuration, the entire absorbent article can be designed in a well-balanced manner, such as by increasing the rigidity of one side and suppressing the rigidity of the other side, thereby suppressing the rigidity of the absorbent article as a whole. In addition, since the shape of the first body compression part and the shape of the second body compression part are different, the user can distinguish between the front and back of the absorbent article by the difference in shape, and the operability at the time of wearing can be improved. Furthermore, since the absorbent article can be worn in an appropriate front-to-rear direction, the absorbent article can be securely fitted to the body, and uncomfortable feeling and leakage during wearing can be suppressed.

According to a preferred aspect, the absorbent core includes a high basis weight region provided at a longitudinal end of the absorbent core, and a high basis weight region located inside the high basis weight region in the longitudinal direction. a low basis weight region having a lower basis weight of absorbent material than the weight region. The high basis weight region has the first high basis weight region that overlaps at least a portion of the first compression region, and the second high basis weight region that overlaps at least a portion of the second compression region. The area of the first high basis weight region is greater than the area of the second high basis weight region. The area of the first high basis weight region is large, and the rigidity on the side of the first pressing region is high. By arranging the first compression area side with relatively high rigidity on the downstream side in the conveying direction, problems during conveying can be further suppressed. In addition, the rigidity of the entire absorbent core can be reduced compared to a configuration in which the rigidity is similarly increased in both the first compression area and the second compression area.

According to a preferred aspect, the absorbent core includes a high basis weight region provided at a longitudinal end of the absorbent core, and a high basis weight region located inside the high basis weight region in the longitudinal direction. a low basis weight region having a lower basis weight of absorbent material than the weight region. The high basis weight region is provided in a region that overlaps with the compressed swelling portion. The low basis weight region is provided in a region that overlaps with the non-compressed region between the compressed bulging portions. According to this aspect, the rigidity of the region provided with the compressed bulging portion can be further enhanced by the high basis weight region. In addition, since the low basis weight area is provided in the non-compressed area, the flexibility of the non-compressed area can be secured, and deterioration of the feeling of wearing can be suppressed.

(2) Overall Schematic Configuration of Absorbent Article Hereinafter, an absorbent article according to an embodiment will be described with reference to the drawings. In addition, in the following description of the drawings, the same or similar reference numerals are given to the same or similar parts. However, it should be noted that the drawings are schematic, and the ratio of each dimension is different from the actual one. Therefore, specific dimensions and the like should be determined with reference to the following description. In addition, portions having different dimensional relationships and ratios may also be included between the drawings. When comparing lengths and positional relationships in the present invention, unless otherwise specified, an absorbent article in a stretched state is used in which the absorbent article is stretched to a state where wrinkles are not formed by the stretchable member.

FIG. 1 is a plan view of an absorbent article 1 according to an embodiment viewed from the skin side. The absorbent article 1 is a sanitary napkin. Note that the absorbent article 1 according to the present invention may be an absorbent article 1 that is used by being attached to a worn article such as underwear, and may be, for example, a light incontinence pad or a panty liner. good. FIG. 2 is a plan view showing the core pressing portion 85 of the absorbent core 30. As shown in FIG. FIG. 3 is a plan view showing regions with different basis weights of absorbent material. Here, the "skin side" corresponds to the side facing the wearer's skin during use. "Non-skin side" corresponds to the side facing away from the wearer's skin during use.

The absorbent article 1 has a longitudinal direction L and a width direction W. As shown in FIG. The longitudinal direction L is a direction extending from the front side (abdominal side) to the rear side (back 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 perpendicular to the longitudinal direction L. As shown in FIG. The absorbent article 1 has a thickness direction extending to the wearer's skin side and non-skin side. The absorbent article 1 includes a front side region S1, a back side region S2, and a crotch region S3. The crotch region S3 is arranged straddling the center of the absorbent article in the longitudinal direction L, and includes an excretory opening contact portion facing the wearer's excretory opening (for example, the vaginal opening). When the absorbent article 1 is worn in underwear, the crotch region S3 is located in the crotch portion of the underwear and is the region between the wearer's crotch, that is, the wearer's legs. The front side region S1 is positioned forward of the crotch region S3. A front edge of the front side region S1 defines a front edge of the absorbent article 1 . The rear side region S2 is located on the rear side of the crotch region S3. A rear edge of the rear side region S2 defines a rear edge of the absorbent article 1 .

The absorbent article may have wings 3 . The wing 3 may be provided in the crotch region S3. The front edge of the wing 3 is defined by the base of the wing 3, and corresponds to the front portion of the two most recessed portions in the width direction W. A front edge of the wing 3 may define a boundary between the crotch region S3 and the front side region S1. The rear edge of the wing 3 is defined by the base of the wing 3, and corresponds to the rearward portion of the two portions that are most recessed inward in the width direction W. As shown in FIG. A rear edge of the wing 3 may define a boundary between the crotch region S3 and the rear side region S2.

The absorbent article 1 includes an absorbent core 30 that absorbs bodily fluids, a liquid-permeable top sheet 10 that is positioned closer to the skin than the absorbent core 30, and a liquid-permeable top sheet 10 that is positioned closer to the non-skin surface than the absorbent core 30. an impermeable backsheet (not shown); The topsheet 10 is oriented against the wearer's skin and the backsheet is oriented away from the wearer's skin. The absorbent core 30 is provided between the topsheet 10 and the backsheet.

The top sheet 10 may cover at least the central portion of the absorbent core 30 in the width direction W. As shown in FIG. The topsheet 10 may extend in the longitudinal direction L from the front side region S1 to the rear side region S2. The top sheet 10 may be composed of, for example, a liquid-permeable sheet such as nonwoven fabric or perforated plastic film. The top sheet 10 may be configured by laminating a plurality of sheets, or may have a second sheet. The backsheet is a liquid-impermeable sheet. The back sheet may be a polyethylene sheet, a laminated nonwoven fabric mainly composed of polypropylene or the like, an air permeable resin film, a sheet in which an air permeable resin film is bonded to a nonwoven fabric such as spunbond or spunlace. The absorbent core 30 is arranged at least in the crotch region S3. Also, the absorbent core 30 may extend from the crotch region S3 to the front region S1. The absorbent core 30 has at least pulp as an absorbent material that absorbs liquid. The absorbent core 30 may be wrapped with a core wrap. The absorbent material that makes up the absorbent core 30 can be formed from, for example, pulp and superabsorbent polymers (SAP). The core wrap can be composed of, for example, non-woven fabrics or tissue sheets. As shown in FIG. 2, the absorbent core 30 is provided with a core compression portion 85 that compresses the absorbent core 30 in the thickness direction. The configuration of the absorbent core 30 will be described in detail later. The absorbent article 1 may have at least a body compressed portion 80 obtained by compressing the absorbent core 30 and the top sheet 10 in the thickness direction. The main body pressing parts 80 are point-like, and are arranged in plurality at intervals.

The absorbent article 1 of the present embodiment is configured such that the absorbent core 30 can be transported appropriately while suppressing deterioration in wearing comfort due to the rigidity of the absorbent core 30 . Next, a configuration for appropriately transporting the absorbent core 30 while suppressing deterioration of wearing comfort will be described in detail. First, the absorbent core 30 will be described in detail. The absorbent article 1 has core compression regions (first compression region 31 and second compression region 32 ) in which core compression portions 85 are provided in the absorbent core 30 . FIG. 2 is a plan view of the absorbent core 30 as seen from the skin side, showing the core compression area. The core compression region is a region where core compression portions 85 are provided at the ends in the longitudinal direction L of the absorbent core. The core compressed area consists of a first compressed area 31 arranged at one end in the longitudinal direction L of the absorbent core 30 and a second compressed area arranged at the other end in the longitudinal direction L of the absorbent core 30. 32 and . In this embodiment, one side in the longitudinal direction L is the rear side, and the other side in the longitudinal direction L is the front side. Therefore, the first compressed area 31 is an area where the core compressed portion 85 is provided at the rear edge 30R of the absorbent core 30 . The first compressed region 31 of the present embodiment is a region arranged along the rear edge 30R of the absorbent core 30 and extending in the width direction W. As shown in FIG. The second compressed area 32 is an area where the core compressed portion 85 is provided at the front edge 30F of the absorbent core 30 . The second compressed region 32 of the present embodiment is a region arranged along the front edge 30F of the absorbent core 30 and extending in the width direction W. As shown in FIG. The absorbent core 30 may also be provided with a longitudinal compression region 33 in addition to the core compression region. The longitudinal compression area 33 is the area in which the core compression part 85 is provided and is arranged between the first compression area 31 and the second compression area 32 . The longitudinally compressed region 33 of the present embodiment is a region arranged along the outer edge 30E of the absorbent core 30 and extending in the longitudinal direction L. As shown in FIG. The first compressed area 31 , the second compressed area 32 and the longitudinal compressed area 33 are continuous with each other and arranged in a ring along the outer edge of the absorbent core 30 .

Between the first compression area 31 and the second compression area 32, a non-compression area 35 in which the core compression part 85 is not provided is provided. The uncompressed areas 35 are arranged between the left and right longitudinal compressed areas 33 . The non-compressed region 35 is a region other than the first compressed region 31 , the second compressed region 32 and the longitudinal compressed region 33 in the absorbent core 30 . The core compression region is not only the region over which the core compression portions 85 are formed, but also the region in which the core compression portions 85 are not formed in the form in which the core compression portions 85 are formed in a certain pattern. It is a concept that also includes Specifically, in the honeycomb shape in which regular hexagons are combined, as in the present embodiment, the inside of the sides forming the regular hexagon does not have the core compression portion 85 formed therein, but constitutes the core compression region. do. Further, in the form in which a plurality of dot-shaped core compressed portions 85 are provided, the core compressed portions 85 are not formed in the regions between the dots, but constitute core compressed regions. The core compressed region and the longitudinal compressed region 33 of the present embodiment are arranged along the outer edge (including the front edge, the rear edge, and the outer edge) of the absorbent core 30, and the non-compressed region 35 is the core compressed region. It is arranged inside (inner side of the longitudinal direction L and inner side of the width direction W) in plan view from the area and the longitudinal compression area 33 .

The shape of the first inner edge 31S, which is the inner edge in the longitudinal direction L of the first compressed region 31, differs from the shape of the second inner edge 32S, which is the inner edge in the longitudinal direction L of the second compressed region 32. ing. The first inner edge 31S is configured by the boundary between the first compressed area 31 and the non-compressed area 35 . The first inner edge 31S of the present embodiment includes a front edge of the first compressed region 31, a portion extending in the width direction W, and a portion extending in the longitudinal direction L in the compression bulging portion, which will be described later. A second inner edge 32</b>S is formed by a boundary between the second compressed area 32 and the non-compressed area 35 . The second inner edge 32S of the present embodiment is a side that includes the rear edge of the second compressed region 32, extends in the width direction W, and has an arc shape. The length of the first inner edge 31S may be different from the length of the second inner edge 32S.

By providing the first compressed area 31 and the second compressed area 32, the rigidity of the ends in the longitudinal direction L of the absorbent core 30 can be increased. Generally, when transporting the absorbent core 30 during manufacturing, the absorbent core 30 is transported along the longitudinal direction L at high speed. At this time, at the end portion in the longitudinal direction L of the absorbent core 30 positioned on the downstream side in the transport direction, the absorbent core 30 is likely to be turned over or twisted. In addition, when there is a gap between conveying mechanisms such as conveyors that convey the absorbent core 30, if the absorbent core 30 is deformed due to the low rigidity of the absorbent core 30, the absorbent core 30 cannot be delivered smoothly. I was afraid. By increasing the rigidity of the ends of the absorbent core 30 in the longitudinal direction L, problems during transportation can be suppressed, and the absorbent core 30 can be properly transported. Also, the shape of the first inner edge 31S and the shape of the second inner edge 32S are different, and the rigidity of one of the first compression area 31 and the second compression area 32 is higher than the rigidity of the other. By arranging the side with relatively high rigidity on the downstream side in the transport direction, problems during transport can be further suppressed. In addition, the rigidity of the entire absorbent core 30 can be suppressed compared to a configuration in which the rigidity is similarly increased in both the first compression area 31 and the second compression area 32 . In addition, a non-compression area 35 is provided inside the core compression area in the longitudinal direction L. The rigidity of the absorbent core 30 can be reduced in the non-squeezed area 35, and deterioration in wearing comfort can be suppressed. In addition, since the shape of the first inner edge 31S of the first compression region 31 and the shape of the second inner edge 32S of the second compression region 32 are different, the user wears it in an appropriate front-back direction due to the difference in shape. Can sometimes improve fit.

The area of the first compressed area 31 may be larger than the area of the second compressed area 32 . The area of the 1st compression area|region 31 is large, and the rigidity of the 1st compression area|region 31 becomes high. By arranging the side of the first compression region 31 having relatively high rigidity on the downstream side in the conveying direction, problems during conveying can be further suppressed. In addition, the rigidity of the entire absorbent core 30 can be suppressed compared to a configuration in which the rigidity is similarly increased in both the first compression area 31 and the second compression area 32 . Also, the length of the first inner edge 31S may be longer than the length of the second inner edge 32S. By arranging the side of the first compression region 31 having relatively high rigidity on the downstream side in the conveying direction, problems during conveying can be further suppressed. Also, the core compression area and the longitudinal compression area 33 may be provided on at least part of the outer edge of the absorbent core 30 . The outer edge of the absorbent core 30 is likely to be hit more strongly by air during transportation. By providing the core pressing portion 85 on the outer edge of the absorbent core 30, problems during transportation of the absorbent core 30 can be further suppressed.

The core compression region may have a bulging compression bulge 36 extending inward in the longitudinal direction L along the longitudinal direction L. The compressed bulge 36 may have a straight portion extending parallel to the longitudinal direction L. The compressed swelling portion 36 may be provided only in the first compressed area 31 of the first compressed area 31 and the second compressed area 32 . That is, the compressed swelling portion 36 is provided in the first compressed area 31 and not provided in the second compressed area 32 . By providing the compression bulging portion 36 , the rigidity of the absorbent core 30 can be increased over a wide range in the longitudinal direction L in the first compression region 31 . In addition, since the compression bulging portion 36 is not provided on the side of the second compression region 32, the rigidity of the entire absorbent core 30 can be suppressed, and deterioration of the feeling of wearing can be suppressed.

The compressed bulging portions 36 may be spaced apart in the width direction W. Non-squeezed areas 35 may be provided between the squeezed bulges 36 . A pair of compressed swelling portions 36 of the present embodiment are provided on both sides of the center of the absorbent core 30 in the width direction W thereof. By providing the compressed bulging portions 36 at intervals in the width direction W, the rigidity of the absorbent core 30 is increased by the compressed bulged portions 36, while the non-compressed regions 35 between the compressed bulged portions 36 ensure flexibility. , the deterioration of the feeling of wearing can be suppressed. The widthwise length of the non-compressed regions 35 located between the compressed bulging portions 36 may be longer than the widthwise length W36 of each compressed bulging portion 36 . It becomes easier to ensure the flexibility of the non-squeezed region 35 .

The first compressed area 31 may be located at the rear end of the absorbent core 30 . The rear end portion of the absorbent core 30 is a region that includes the rear edge of the absorbent core 30 and extends forward from the rear end portion over a certain range (for example, the length in the longitudinal direction is 10 mm). The rear end portion of the absorbent article 1 tends to twist under pressure from the buttocks when sitting or the like. By providing the first compression region 31 including the compression bulging portion 36 in the rear side region S2, the rigidity of the rear side region S2 can be increased, and deformation due to the wearer's pressure can be suppressed. In addition, since the compressed swelling portion 36 extends inward in the longitudinal direction L along the longitudinal direction L, a deformation base point extending in the longitudinal direction L is formed in the rear side region S2. Therefore, the rear side region S2 easily conforms to the unevenness of the body formed by the swelling of the buttocks or the like in the cross section of the body extending in the width direction W. The fit of the rear side region S2 can be improved, and uncomfortable feeling and leakage when worn can be suppressed. In the present embodiment, the first compressed region 31 is arranged at the rear end portion of the absorbent core 30, and the second compressed region 32 is arranged at the front end portion of the absorbent core 30. A compressed region 31 may be located at the front end of the absorbent core 30 and a second compressed region 32 may be located at the rear end of the absorbent core 30 . The absorbent core 30 may be transported so that the front end of the absorbent core 30 is on the downstream side in the transport direction.

The core compression part 85 may have a honeycomb shape combining regular hexagons. Since the sides 851 forming the regular hexagon extend in multiple directions, it is flexible and easily deformable. In addition, the core pressing portion 85 has a point-like portion 852 spaced apart from the sides 851 of the regular hexagon inside the regular hexagon. Since the dotted portions are provided, the rigidity of the inside of the regular hexagon is increased, and while the honeycomb shape flexibly deforms, the rigidity can be partially increased, and the absorption core 30 can be prevented from twisting.

The compressed bulging portion 36 may extend inward in the longitudinal direction L from the imaginary line FL connecting the outer edges of the first compressed regions 31 . According to this configuration, the rigidity of the inner region in the longitudinal direction L is increased from the first compressed region 31 arranged along the rear edge of the absorbent core 30, and not only the rear end portion of the absorbent core 30 but also the rear Curling of the absorbent core 30 can be suppressed over a wide range extending inward in the longitudinal direction L from the ends. Moreover, the length W36 in the width direction W of the compressed bulging portion 36 may be longer than the length W33 in the width direction W of the longitudinal compressed region 33 . Since the length W36 in the width direction W of the compressed swelling portion 36 is relatively long, the curling of the absorbent core 30 can be suppressed over a wide range in the width direction W of the absorbent core 30 . In addition, since the length W33 in the width direction W of the longitudinal compression region 33 is relatively short, the outer edge 30E of the absorbent core 30 is prevented from becoming too hard, and when the outer edge 30E of the absorbent core 30 hits the leg, Discomfort can be suppressed. In addition, in a form in which the length W36 in the width direction W of the compressed swelling portion 36 and the length W33 in the width direction W of the longitudinal compressed region 33 change, the maximum width may be compared.

The first inner edge 31S includes a side portion 31S1 extending outward in the longitudinal direction L toward the inner side in the width direction W from the outer edge of the first inner edge 31S, and an inner side in the width direction W from the inner edge of the side portion 31S1. and an interior 31S2 extending inwardly in the longitudinal direction L toward the . The interior 31S2 may extend inward in the longitudinal direction L from the imaginary line FL that connects the outer edges of the first compressed regions 31 . The interior 31S2 may be linear extending in the longitudinal direction L. According to such a configuration, it is possible to prevent the absorbent core 30 from being turned over over a wide range extending inward in the longitudinal direction L from the rear end portion of the absorbent core 30 .

The body compression portion 80 may overlap a portion of the compression bulge portion 36 . In the area where the compressed body portion 80 and the compressed bulging portion 36 overlap, the compressed core portion 85 and the compressed body portion 80 are formed, and the absorbent core 30 is compressed multiple times. The body compressing portion 80 of the present embodiment is point-shaped. A plurality of point-like main body compression portions 80 overlap the compression bulge portion 36 . The absorbent article deforms with the main body compressing portion 80 as a base point when it receives body pressure from the side when worn. At this time, since the compressed body portion 80 overlaps a part of the expanded compressed portion 36, the compressed expanded portion 36 also serves as a starting point in conjunction with the compressed body portion 80, making it easier to induce deformation of the absorbent article 1. , easy to follow the shape and movement of the body. In addition, since the compressed body portion 80 overlaps a part of the compressed bulging portion 36 and does not overlap the entire compressed bulged portion 36, the stiffness of the absorbent article 1 may locally become too high. can be suppressed, and the flexibility of the entire absorbent article 1 can be ensured.

The main body compression part 80 includes a first main body compression part 81 arranged on the side of the first compression region 31 from the article longitudinal center 1CL, which is the center of the absorbent article in the longitudinal direction L, and a second compression part 81 arranged from the article longitudinal center 1CL. and a second body pressing portion 82 arranged on the side of the region 32 . The first body compression part 81 of the present embodiment is the body compression part 80 positioned rearward of the article longitudinal center 1CL, and the second body compression part 82 is the body compression positioned forward of the article longitudinal center 1CL. part 80; The first main body compression portion 81 overlaps the compression bulge portion 36 . Therefore, while increasing the rigidity of the absorbent core 30 on the side of the first compression region 31 having the bulging portion 36, the base point of deformation by the bulging portion 36 is provided on the side of the first compression region 31, thereby improving fit to the body. .

The shape of the first body pressing portion 81 and the shape of the second body pressing portion 82 may be different. According to this configuration, the entire absorbent article 1 can be designed in a well-balanced manner, such as by increasing the rigidity of one side while suppressing the rigidity of the other side, thereby suppressing the rigidity of the absorbent article 1 as a whole. In addition, since the shape of the first body compression part 81 and the shape of the second body compression part 82 are different, the user can distinguish between the front and back of the absorbent article 1 by the difference in shape, and the operability at the time of wearing can be improved. . Furthermore, since the absorbent article can be worn in an appropriate front-to-rear direction, the absorbent article can be securely fitted to the body, and uncomfortable feeling and leakage during wearing can be suppressed. In this embodiment, the area of the second body compression part 82 is larger than the area of the first body compression part 81 , and the area of the first compression region 31 is larger than the area of the second compression region 32 . Therefore, while the rigidity of the rear end portion of the absorbent core 30 is increased by the first compression region 31, the rigidity of the front end portion of the absorbent core 30 can be increased by the second main body compression portion 82, and the rigidity of the absorbent article as a whole can be improved in a well-balanced manner. can increase

The area of the first body compression part 81 may be smaller than the area of the second body compression part 82 . Since the area of the first compression region 31 is larger than the area of the second compression region 32 and the area of the first body compression portion 81 is smaller than the area of the second body compression portion 82, the core compression region causes the rear end of the absorbent core to While increasing the rigidity of the front end portion of the absorbent article, the compression body portion 80 can increase the rigidity of the front end portion of the absorbent article. Therefore, the rigidity of the absorbent article as a whole can be designed in a well-balanced manner while suppressing problems during transportation of the absorbent core. Therefore, it is possible to prevent problems such as local hard or soft local hard or soft front and rear ends of the absorbent article when worn.

The absorbent core 30 may have regions with different basis weights of absorbent material. FIG. 3 is a plan view of the absorbent core 30 viewed from the skin surface side, and shows areas where the basis weight of the absorbent material is different. The regions where the basis weight of the absorbent material differs are the first region R1 provided at the end of the absorbent core 30 in the longitudinal direction L, and the region adjacent to the first region R1 and inside the first region R1 in the longitudinal direction L. a second region R2 located in the second region R2, a third region R3 located inside the second region R2 in the longitudinal direction L and centered in the width direction W of the absorbent core 30; and a fourth region R4 positioned inside in the direction L and positioned laterally in the width direction W of the absorbent core 30 . The third region R3 is sandwiched between the left and right fourth regions R4. In FIG. 3, the first region R1 to the fourth region R4 are hatched differently. The basis weight of the absorbent material differs from the first region R1 to the fourth region R4. In the present embodiment, the basis weight of the first region R1 is 250 g/m ² , the basis weight of the second region R2 is 200 g/m ² , and the basis weight of the third region R3 is 600 g/m 2 . ² , and the basis weight of the fourth region R4 is 280 g/m ² . The basis weight of the second region R2<the basis weight of the first region R1<the basis weight of the fourth region R4<the basis weight of the third region R3.

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

The basis weight of the absorbent material in the first region R1 is lower than the basis weight of the absorbent material in the second region R2. The first region R1 constitutes the "high basis weight region" of the present invention, and the second region R2 constitutes the "low basis weight region" of the present invention. The “high basis weight region” of the present invention may have a higher basis weight than the adjacent regions, and may have a lower basis weight than the regions (the third and fourth regions) located inside the adjacent regions in the longitudinal direction. good too. The first region R1 as a high basis weight region includes a first high basis weight region R11 where at least a portion of the first compression region 31 overlaps, and a second high basis weight region R12 where at least a portion of the second compression region 32 overlaps. and have The first high basis weight region R11 may overlap at least a portion of the first compression region 31 , and may overlap the entire first compression region 31 . The first high basis weight region R<b>11 of the present embodiment may coincide with the range of the first pressing region 31 . Moreover, the second high basis weight region R12 may overlap at least a portion of the second pressing region 32 and may overlap the entire second pressing region 32 . The second high basis weight region R<b>12 of the present embodiment may match the range of the second pressing region 32 . The first high basis weight region R11 of the present embodiment is arranged at the rear end portion of the absorbent core 30, and the second high basis weight region R12 is arranged at the front end portion of the absorbent core 30. As shown in FIG. Therefore, the basis weight of the absorbent material in the core compressed areas (the first compressed area 31 and the second compressed area) is higher than the basis weight of the absorbent material in the adjacent areas of the non-compressed areas 35 adjacent to the core compressed area. By having the first high basis weight region R11 and the second high basis weight region R12, the rigidity of the region where the core pressing portion 85 is provided can be further increased, and the rigidity of the end portion of the absorbent core 30 can be further increased. can be done. In addition, it is sufficient that the basis weight of the absorbent material in at least one of the first compressed area 31 and the second compressed area 32 is higher than the basis weight of the absorbent material in the adjacent area. In a spike embodiment, the basis weight of the absorbent material in both the first and second compression zones 31 and 32 is higher than the basis weight of the absorbent material in the adjacent zones.

The area of the first high basis weight region R11 may be larger than the area of the second high basis weight region R12. The area of the first high basis weight region R11 is large, and the rigidity on the first pressing region 31 side is high. By arranging the side of the first compression region 31 having relatively high rigidity on the downstream side in the conveying direction, problems during conveying can be further suppressed. In addition, the rigidity of the entire absorbent core 30 can be suppressed compared to a configuration in which the rigidity is similarly increased in both the first compression area 31 and the second compression area 32 .

The first region R<b>1 as the high basis weight region may be provided in a region overlapping with the compressed swelling portion 36 . The first region R<b>1 may overlap at least a portion of the compressed bulging portion 36 , and may overlap the entire compressed bulging portion 36 . The rigidity of the area where the compressed bulge 36 is provided can be further enhanced by the high basis weight area. The second region R<b>2 as the low basis weight region may be provided in a region overlapping the non-compressed region 35 between the compressed bulging portions 36 . The second region R2 may overlap at least a portion of the non-compressed region 35 and may overlap the entire non-compressed region 35 . Since the low basis weight area is provided in the non-compressed area 35, the flexibility of the non-compressed area 35 can be secured, and deterioration of wearing comfort can be suppressed.

The basis weight of the absorbent material in the first compressed areas 31 is higher than the basis weight of the absorbent material in the adjacent areas of the non-compressed areas 35 adjacent to the first compressed areas 31 and the basis weight of the absorbent material in the second compressed areas 32. may be higher than the basis weight of the absorbent material in the adjacent areas of the uncompressed areas 35 adjacent to the second compressed areas 32 . In the present embodiment, the range of the first region R1 and the range of the first compression region are the same, and the range of the first region R1 and the range of the second compression region 32 are the same, the first compression region 31 and The basis weight of the absorbent material in the second compressed region 32 is the basis weight of the absorbent material in the first region R1. The second region in the present embodiment is adjacent to the first region and constitutes the "adjacent region" of the invention. The ends of the absorbent core 30 in the longitudinal direction L are stiffened by the first and second compressed regions 31 and 32 and are stiffened by the relatively high basis weight. By increasing the rigidity of the ends of the absorbent core 30 in the longitudinal direction L, problems during transportation can be suppressed, and the absorbent core 30 can be properly transported. Further, the core compressed portion 85 is not provided inside the first compressed region 31 and the second compressed region 32 in the longitudinal direction L, and the basis weight of the absorbent material is low. It is possible to reduce the rigidity of the absorbent core 30 in the adjacent region, thereby suppressing deterioration in wearing comfort.

The first region R1 as a high basis weight region has a bulging basis weight portion R5 extending inward in the longitudinal direction L along the longitudinal direction L. The bulging portion R5 may be provided only in the first high basis weight region R11 of the first high basis weight region R11 and the second high basis weight region R12. That is, the basis weight swelling portion R5 is provided in the first high basis weight region R11 and is not provided in the second high basis weight region R12. By providing the basis weight swelling portion R5, the rigidity of the absorbent core 30 can be increased over a wide range in the longitudinal direction L in the first high basis weight region R11. Moreover, since the second high basis weight region R12 is not provided with the basis weight bulging portion R5, the rigidity of the entire absorbent core 30 can be suppressed, and the wearing comfort can be suppressed.

The basis weight swelling portions R5 may be arranged at intervals in the width direction W. A second region R2 as a low basis weight region may be provided between the basis weight swelling portions R5. The basis weight bulge portion R5 of the present embodiment matches the range of the compressed bulge portion 36, and the second region R2 as the low basis weight region is arranged in the non-compressed region 35. As shown in FIG. By providing the basis weight swelling portions R5 at intervals in the width direction W, the rigidity of the absorbent core 30 is increased by the basis weight swelling portions R5, and a low basis weight region (second region) can ensure flexibility and suppress deterioration of wearing comfort.

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

1: absorbent article 30: absorbent core 31: first compression region (core compression region)
31S: first inner edge 32: second compression area (core compression area)
32S: second inner edge 35: non-compressed area 36: compressed bulge portion 80: main body compressed portion 81: first main body compressed portion 82: second main body compressed portion 85: core compressed portion FL: imaginary line R1: first area (high basis weight area)
R11: first high basis weight region R12: second high basis weight region R2: second region (adjacent region, low basis weight region)
R3: Third region R4: Fourth region R5: Basis weight swelling portion S1: Front side region S2: Rear side region S3: Crotch region L: Longitudinal direction W: Width direction

Claims (8)

a longitudinal direction and a width direction perpendicular to each other;
an absorbent core having an absorbent material;
an absorbent article having a core compression region provided with a core compression portion that compresses at least the absorbent core in the thickness direction,
The core compression area includes a first compression area arranged at one end in the longitudinal direction of the absorbent core and a second compression area arranged at the other end in the longitudinal direction of the absorbent core. and
Between the first compression region and the second compression region, a non-compression region in which the core compression portion is not provided is provided,
The shape of the inner edge in the longitudinal direction of the first compression region is different from the shape of the inner edge in the longitudinal direction of the second compression region,
The core compressed region has a compressed bulge extending inwardly in the longitudinal direction along the longitudinal direction,
The compressed bulging portion is provided only in the first compressed region out of the first compressed region and the second compressed region ,
The absorbent article, wherein the first compressed region is provided at the longitudinal outer edge of the absorbent core . The compressed swelling portions are arranged at intervals in the width direction,
2. The absorbent article according to claim 1, wherein said non-compressed regions are provided between said compressed bulging portions. 3. The absorbent article according to claim 1 or 2, wherein said first compressed area is located at the rear end of said absorbent core. At least the absorbent core and a top sheet disposed on the skin surface side of the absorbent core are compressed in the thickness direction, and have a main body pressing portion,
4. The absorbent article according to any one of claims 1 to 3, wherein said body compressed portion overlaps with a portion of said compressed swelling portion. The main body compression part includes a first main body compression part arranged closer to the first compression area than the center of the absorbent article in the longitudinal direction, and a second compression area that is closer to the center of the absorbent article in the longitudinal direction. a second body compression part disposed on the side;
The absorbent article according to claim 4, wherein the shape of the first compressed body portion and the shape of the second compressed body portion are different. The absorbent core includes a high basis weight region provided at the longitudinal end of the absorbent core, and an absorbent material located inside the high basis weight region in the longitudinal direction relative to the high basis weight region and containing more absorbent material than the high basis weight region. and a low basis weight region having a low basis weight of
The high basis weight region is provided in a region overlapping with the compressed swelling portion,
The absorbent article according to any one of claims 1 to 5, wherein the low basis weight region is provided in a region overlapping the non-compressed region between the compressed bulging portions. a longitudinal direction and a width direction perpendicular to each other;
an absorbent core having an absorbent material;
an absorbent article having a core compression region provided with a core compression portion that compresses at least the absorbent core in the thickness direction,
The core compression area includes a first compression area arranged at one end in the longitudinal direction of the absorbent core and a second compression area arranged at the other end in the longitudinal direction of the absorbent core. and
Between the first compression region and the second compression region, a non-compression region in which the core compression portion is not provided is provided,
The shape of the inner edge in the longitudinal direction of the first compression region is different from the shape of the inner edge in the longitudinal direction of the second compression region,
The absorbent core includes a high basis weight region provided at the longitudinal end of the absorbent core, and an absorbent material located inside the high basis weight region in the longitudinal direction relative to the high basis weight region and containing more absorbent material than the high basis weight region. and a low basis weight region having a low basis weight of
The high basis weight region has a first high basis weight region that overlaps at least a portion of the first compression region and a second high basis weight region that overlaps at least a portion of the second compression region,
The absorbent article, wherein the area of the first high basis weight region is greater than the area of the second high basis weight region. The absorbent article according to any one of claims 1 to 7, wherein the area of the first compressed area is larger than the area of the second compressed area.

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