KR20200103685A - Absorbent article - Google Patents

Abstract

The absorbent article 1 of the present invention has a top sheet 10 and an absorbent core 20 disposed on the non-skin facing side of the top sheet 10. The top sheet 10 has a first top sheet 11 containing non-heat-sealed fibers, and a second top sheet 12 positioned on the non-skin side of the first top sheet 11. . The outer edge 11E of the width direction W of the 1st top sheet 11 is arrange|positioned on the skin-facing surface side of the 2nd top sheet 12. A bonding region RX to which the first top sheet 11 and the second top sheet 12 are bonded is provided. A free end 15 that is not bonded to the second top sheet 12 is provided on the outer edge of the first top sheet 11.

Description

Absorbent article

The present invention relates to absorbent articles such as sanitary pads.

In Patent Document 1, absorbent articles such as sanitary pads are disclosed. In the absorbent article of Patent Document 1, a plurality of topsheets are provided on the side of the absorbent core facing the skin.

The top sheet includes a first top sheet (the top sheet of Patent Document 1) and a second top sheet (the heat-sealed fiber sheet of Patent Document 1) overlapping the first top sheet in the thickness direction. The first top sheet is made of a nonwoven fabric (specifically, a cotton nonwoven fabric) containing non-heat-fused fibers. The first top sheet is bonded to the second top sheet by a large number of embosses. Thereby, since the non-heat-fused fibers are bonded to the second surface sheet, it is possible to make it difficult for the non-heat-fused fibers to come off.

Japanese Patent No. 5074913

In the absorbent article of Patent Document 1, the outer edge of the first top sheet is bonded to the back sheet outside the absorbent core in the width direction (see Fig. 2 of Patent Document 1). Since the outer edge of the first top sheet bonded to the back sheet has high rigidity, the wearer's legs rub against the outer edge of the first top sheet, such as when the wearer walks, thereby deteriorating the wearer's touch. there was.

Accordingly, there is a need for an absorbent article capable of suppressing deterioration of the wearer's feel while suppressing the separation of the non-heat-fused fibers.

An absorbent article according to an aspect has a front-rear direction, a width direction orthogonal to the front-rear direction, a top sheet, and an absorbent core disposed on a non-skin facing side of the top sheet, the top sheet, An absorbent article having a first surface sheet containing non-heat-fused fibers and a second surface sheet positioned on a non-skin surface side of the first surface sheet, the outer edge of the first surface sheet in the width direction. ) Is disposed on the side of the skin-facing surface of the second surface sheet, a bonding region in which the first surface sheet and the second surface sheet are bonded is provided, and at an outer edge of the first surface sheet , A free end portion not bonded to the second surface sheet is provided.

1 is a plan view of an absorbent article according to a first embodiment as viewed from the side facing the skin.
FIG. 2 is a cross-sectional view taken along line AA shown in FIG. 1.
3 is an enlarged view of part B shown in FIG. 2.
Fig. 4 is a plan view showing an adhesive region and a sheet pressing portion in the absorbent article according to the first embodiment.
5 is a plan view of the absorbent article according to the second embodiment as viewed from the side facing the skin.
6 is a cross-sectional view taken along line AA shown in FIG. 5.
7 is an enlarged view of portion B shown in FIG. 6.
Fig. 8 is a plan view showing an adhesive region and a sheet pressing portion in the absorbent article according to the second embodiment.

(1) Summary of embodiment

At least the following matters are clarified by description of this specification and accompanying drawings.

The absorbent article according to an aspect has a front-rear direction, a width direction orthogonal to the front-rear direction, a top sheet, and an absorbent core disposed on a non-skin side of the top sheet, wherein the top sheet includes non-heat-fused fibers An absorbent article having a first surface sheet comprising a first surface sheet, and a second surface sheet positioned on a non-skin surface side of the first surface sheet, wherein an outer edge of the first surface sheet in the width direction is the second surface It is disposed on the skin-facing surface side of the sheet, a bonding region in which the first top sheet and the second top sheet are bonded is provided, and at the outer edge of the first top sheet, the second top sheet is not bonded. Free ends are installed.

According to this aspect, in the bonding region, since the non-heat fused fibers contained in the first surface sheet are bonded to the second surface sheet, the non-heat fused fibers can be made difficult to detach. Since the outer edge of the first top sheet is provided with a free end, the rigidity of the outer edge of the first top sheet is not increased, and deterioration of the wearer's touch can be suppressed.

According to a preferred aspect, the distance in the width direction between the bonding region and the outer edge of the first surface sheet is shorter than the fiber length of the non-heat fused fiber.

In the absorbent article of Japanese Unexamined Patent Application Publication No. Hei 10-118118, a top sheet is folded in the width direction. The folded portion of the top sheet is not bonded to the sheet located on the non-skin facing side of the top sheet, and is configured to be able to stand on the wearer's side. The tip end of the folded portion is disposed toward the outside in the width direction. The folded portion is configured to be able to stand on the wearer's side, and is disposed between the legs when worn. Therefore, when the wearer walks or the like, the tip of the folded portion of the top sheet may rub against the wearer's legs. When the top sheet is repeatedly rubbed by the legs, there is a concern that fibers constituting the top sheet may be separated. In particular, as in Japanese Unexamined Patent Application Publication No. Hei 10-118118, in a sheet containing non-heat-sealed fibers, the fibers do not have heat-sealing properties, so the fibers tend to be more easily detached. Therefore, there is a need for an absorbent article capable of suppressing the separation of the non-heat fused fibers in the outer edge in the width direction of the top sheet.

According to the above-described preferred aspect, since the distance in the width direction between the bonding region and the outer edge of the first surface sheet is shorter than the fiber length of the non-heat fused fiber, at least a part of the non-heat fused fiber is easily bonded in the bonding region. Therefore, it is possible to hold the non-heat-sealed fiber by the bonding region, and it is possible to suppress the separation of the non-heat-sealed fiber when the outer edge of the first surface sheet rubs against it.

According to a preferred aspect, in the bonding region, a pressing portion obtained by compressing the first top sheet and the second top sheet is provided.

According to the pressing portion, the first surface sheet is bonded over a certain range extending in the thickness direction of the first surface sheet as well as bonding between the non-skin facing side of the first top sheet and the skin facing side of the second top sheet. easy. Therefore, in the bonding region, the non-heat-fused fibers are more easily bonded to the second surface sheet.

According to a preferred aspect, the crimping portion is disposed at intervals in the front-rear direction or the width direction.

Compared with the configuration in which the pressing portions are arranged continuously, the rigidity of the outer edge of the first top sheet is lowered, and the outer edge of the first top sheet becomes easier to follow the movement of the leg. Therefore, it is possible to suppress the friction between the outer edge of the first surface sheet and the leg, and to suppress the separation of the non-heat fused fibers of the first surface sheet.

According to a preferred aspect, an adhesive for bonding the first top sheet and the second top sheet is provided in the bonding region.

In the configuration in which the first top sheet and the second top sheet are bonded by an adhesive, it is difficult to apply heat or pressure to the first top sheet during bonding. Accordingly, breaking of the non-heat-fused fibers due to heat or the like during bonding can be suppressed, and separation of the fibers of the first surface sheet can be further suppressed.

According to a preferred aspect, the first surface sheet contains heat-sealed fibers.

Since the first surface sheet contains the heat-fused fibers, a fused portion is formed between the fibers by the fusion of the heat-fused fibers, and the non-heat-fused fibers are difficult to detach.

According to a preferred aspect, the second surface sheet contains heat-sealed fibers.

Since the second surface sheet contains the heat-fused fibers, a fused portion is formed between the fibers by fusion of the heat-fused fibers, and the non-heat-fused fibers of the first surface sheet are caught in the fused portion, making it difficult to detach.

According to a preferred embodiment, a side sheet covering an outer edge of the absorbent article is disposed on a side of the non-skin facing surface of the second top sheet, and an outer edge of the second top sheet is an outer side of the first top sheet. It is located outside the edge in the width direction, and has a side non-bonded region in which the outer edge of the second top sheet and the side sheet are not bonded.

The outer edge of the second top sheet is positioned outside the first top sheet in the width direction, and stands with respect to the side sheet in the side non-bonding region. Therefore, when sandwiched by the wearer's leg, the outer edge of the second top sheet tends to touch the leg earlier than the outer edge of the first top sheet. Separation of the non-heat-sealed fiber due to the outer edge of the first surface sheet rubbing against the leg can be further prevented.

According to a preferred embodiment, the second surface sheet is folded based on the folds along the front-rear direction, and the folds are provided on the outer edge of the second surface sheet.

Since the second top sheet is folded, it is easy to deform the folded crack as a starting point when it touches the wearer's leg. By deforming the second top sheet, it is possible to alleviate the contact with the first top sheet and to suppress the separation of the non-heat-fused fibers of the first top sheet.

According to a preferred aspect, the outer edge of the first surface sheet is located inside the outer edge of the absorbent core in the width direction.

When sandwiched by the wearer's leg, the outer edge of the absorbent core tends to contact the leg earlier than the outer edge of the first surface sheet. Separation of the non-heat-sealed fiber due to the outer edge of the first surface sheet rubbing against the leg can be further prevented.

According to a preferred aspect, a pressing portion obtained by compressing at least the first top sheet and the second top sheet in the thickness direction is provided.

The free end of the first surface sheet is easily movable in the planar direction, and can move toward the crimping portion when compressed in the thickness direction at the time of forming the crimping portion. Accordingly, the force in the tensioning direction with respect to the first surface sheet can be reduced when forming the pressing portion, so that the first surface sheet can be prevented from bursting.

According to a preferred aspect, the first surface sheet, the second surface sheet, and the absorbent core are compressed in the pressing portion.

In the configuration in which the first top sheet, the second top sheet, and the absorbent core are compressed, the degree of compression is stronger compared to the configuration in which only the first top sheet and the second top sheet are compressed, and the first top sheet is more likely to burst. . Therefore, it is preferable to suppress tearing of the first top sheet by the free end.

According to a preferred aspect, the free end overlaps the absorbent core in the thickness direction.

Since the crimping portion is formed on the absorbent core and the free end is overlaid on the absorbent core, the crimping portion and the free end are easily arranged close together. By disposing the free end for alleviating the force in the tensile direction near the crimping portion, it is possible to further suppress the first surface sheet from bursting.

According to a preferred aspect, the free end includes an outer edge of the first surface sheet in the width direction and extends in the front-rear direction.

By providing the free end on the outer edge of the first top sheet, it is easy to secure the area of the free end, and tearing of the first top sheet can be further suppressed.

According to a preferred aspect, the pressing portion is concave from the first surface sheet side toward the second surface sheet side.

The force to be compressed by the pressing portion is applied from the first top sheet to the second top sheet side. Since the free end is provided on the side to which the force is applied (the side facing the skin), the force in the tensioning direction can be more relaxed, and tearing of the first surface sheet can be further suppressed.

According to a preferred aspect, the elongation of the second top sheet is higher than that of the first top sheet.

Since the second surface sheet is higher than the elongation of the first surface sheet, even when a sheet of low elongation is used to the first surface sheet, the decrease in the elongation of the entire surface sheet is suppressed and tearing of the first surface sheet is reduced. can do.

According to a preferred embodiment, an adhesive region having an adhesive for bonding the first surface sheet and the second surface sheet is provided inside the free end, and a plurality of the adhesive regions are provided with an interval.

In the bonding region, the first top sheet and the second top sheet are bonded, and in the area between the bonding areas, the first top sheet and the second top sheet are not bonded. Therefore, when a force to be pulled is applied, there are a portion that is easy to move (a region between the adhesive regions) and a portion that is difficult to move (a region between the adhesive regions). When a tensile force is applied, the part that is difficult to move is moved to the starting point. By providing a plurality of such regions, the force in the tensile direction can be more relaxed in a wide range of the first surface sheet, and tearing of the first surface sheet can be further suppressed.

According to a preferred aspect, the pressing portion has a first pressing portion disposed at the free end.

In the case of forming the first crimp portion at the free end, the region where the first top sheet and the second top sheet are not bonded is compressed to form a first crimp portion. Since the first top sheet and the second top sheet are not joined at least around the first pressing portion, the force in the tensile direction acting on the first top sheet can be relaxed. Therefore, it is possible to more suppress the first surface sheet from bursting.

According to a preferred aspect, the first pressing portion extends over the free end portion and a region outside the first surface sheet.

Compared with the configuration in which the entire first crimping portion is formed on the first surface sheet, the force in the tensile direction acting on the first surface sheet when the first crimping portion is formed is alleviated. Therefore, it is possible to more suppress the first surface sheet from bursting.

According to a preferred embodiment, the crimping portions are arranged in a pair with an interval in a plan view, and the spacing between the pair of crimping portions is not constant.

In a portion where the distance between the crimp portions is wide, the length of the first surface sheet in the portion is long, so that the force in the tension direction at the time of forming the crimp portion acts weakly. On the other hand, in a portion where the distance between the crimping portions is narrow, the length of the first surface sheet in the portion is short, so that the force in the tensile direction at the time of forming the crimping portion acts strongly. Since the portion where the tensile force acts strongly and the portion that acts weakly are mixed, the force is not concentrated compared to the case where the force is applied evenly, and the bursting of the first surface sheet can be further suppressed.

(2) Configuration of the absorbent article according to the first embodiment

Hereinafter, the absorbent article according to the first embodiment will be described with reference to the drawings. The absorbent article may be an absorbent article such as a sanitary pad, a panty liner, a breast milk pad, an adult incontinence pad, a fecal pad, or a sweat sheet. In particular, the absorbent article may be an article that is used by being attached to the inside of a worn article such as an undergarment of a user.

In addition, in the description of the following drawings, the same or similar reference numerals are attached to the same or similar parts. However, it should be noted that the drawings are schematic, and the ratio of each dimension may differ from that of the actual one. Therefore, specific dimensions and the like should be determined in consideration of the following description. In addition, there are cases where parts having different dimensional relationships and ratios are included in the drawings as well.

1 is a plan view of an absorbent article 1 according to a first embodiment as viewed from the side facing the skin. Here, the "skin facing surface side" corresponds to the side facing the wearer's skin during use. The "non-skin facing side" corresponds to the side facing away from the wearer's skin during use. FIG. 2 is a cross-sectional view taken along line A-A shown in FIG. 1, and FIG. 3 is an enlarged view of portion B shown in FIG. 2. Fig. 4 is a plan view showing an adhesive region and a sheet pressing portion in the absorbent article according to the first embodiment.

The absorbent article 1 has a front-rear direction (L) and a width direction (W). The anteroposterior direction L is a direction extending from the front side (abdominal 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 absorbent article 1 includes a front region R1, a rear region R2, and a center region R3. The central region R3 includes an excretory mouth abutting portion R33 that faces an excretory mouth (for example, a vaginal mouth) of the wearer. When the absorbent article 1 is attached to the undergarment, the central region R3 is located under the crotch of the undergarment. That is, the excretory mouth abutting portion R33 is an area disposed under the wearer's crotch, that is, between the wearer's legs.

The front region R1 is located in front of the central region R3. The shear edge of the front region R1 defines the shear edge of the absorbent article 1. The rear region R2 is located behind the central region R3. The trailing edge of the rear region R2 defines the trailing edge of the absorbent article 1. The length of the rear area R2 in the front-rear direction L may be longer than the length of the center area R3 in the front-rear direction L.

In the center region R3, a blade 3 to be described later may be provided. Further, in the rear region R2, a hip flap 4 bulging outward in the width direction W may be provided. The front edge of the blade 3 is defined by the dead edge of the blade 3, and corresponds to a part positioned on the front side of the two parts that are deeply recessed in the width direction W. The front edge of the blade 3 may define a boundary between the central region R3 and the front region R1. The trailing edge of the blade 3 is defined by the dead edge of the blade 3, and corresponds to a portion located at the rear side of the two portions that are recessed inward in the width direction W most. The rear edge of the blade 3 may define a boundary between the central region R3 and the rear region R2.

The absorbent article 1 is between the top sheet 10 facing the wearer's skin, the back sheet 14 facing away from the wearer's skin, and the top sheet 10 and the back sheet 14. And an absorbent core 20 disposed thereon. The surface sheet 10 is provided on the skin-facing surface side T1 than the absorbent core 20. The back sheet 14 is provided on the non-skin facing surface side T2 than the absorbent core 20. The absorbent core 20 is provided between the top sheet 10 and the back sheet 14.

The top sheet 10 is a liquid-permeable sheet that permeates a liquid such as a body fluid. The top sheet 10 may cover the central portion of the absorbent core 20 in the width direction W. The top sheet 10 may extend in the front-rear direction L from the front region R1 to the rear region R2. The top sheet 10 may have the first top sheet 11 and the second top sheet 12 positioned on the non-skin facing side of the first top sheet 11.

The first top sheet 11 contains non-heat fused fibers. Cotton fiber can be illustrated as a non-thermal fusion fiber. The first surface sheet 11 is formed by interlocking of non-heat fused fibers. The fiber length of the cotton fiber is, for example, 10 to 80 mm. When the fiber length of the cotton fiber is less than 10 mm, the fiber length is too short to entangle the fibers, and there is a fear that sufficient strength may not be obtained. When the fiber length of the cotton fiber exceeds 80 mm, several strands of such fibers extend in the width direction, and there is a possibility that the fibers may be stretched from the edge of the thigh of the wearer to the edge of the other thigh. In that case, due to the diffusion effect of the liquid of the water-retaining fiber, liquid excreta adhered to the central portion of the absorbent article 1 in the width direction (W) may diffuse to both thighs, causing discomfort to the wearer. have. The fiber length is preferably 15 to 60 mm, more preferably 20 to 40 mm. The unit weight of the cotton nonwoven fabric should be 20-150 g/m ² . Moreover, the 1st surface sheet 11 may be a two-layer structure. You may have a heat-sealed fiber in the lower layer of the 1st surface sheet 11. The breaking elongation of the first surface sheet 11 is good if the strength along the fiber orientation direction is 30 to 60 N/25 mm, and the tensile speed after setting the magnetic spacing in the orientation direction and orthogonal to the fiber to 20 mm It is measured under the setting conditions of 100 mm/min, and the strength at break is 5 to 10 N/25 mm.

The second surface sheet 12 includes heat-sealed fibers. The second surface sheet 12 is formed by fusion bonding of heat-sealed fibers. The top sheet 10 may further have a side sheet 13. The side sheet 13 may extend outward in the width direction of the first top sheet 11 and the second top sheet 12. The side sheet 13 is disposed on the non-skin facing side of the first top sheet 11 and the second top sheet 12, and does not cover the first top sheet 11 and the second top sheet 12. not.

As shown in FIG. 3, the 1st top sheet 11 and the 2nd top sheet 12 are laminated in the thickness direction T. The first top sheet 11 and the second top sheet 12 may be bonded in the bonding region RX. In the region where the first surface sheet 11 and the second surface sheet 12 overlap, a bonding region RX in which the first surface sheet 11 and the second surface sheet 12 are joined, and the first surface sheet A non-joined region RY in which (11) and the second topsheet 12 are not joined is provided. At least a part of the non-joined region RY constitutes a free end 15 to be described later.

The top sheet 10 may further have a side sheet 13. The side sheet 13 may extend outward in the width direction of the first top sheet 11 and the second top sheet 12. The side sheet 13 covers the outer edge of the absorbent article. The side sheet 13 is disposed on the non-skin facing side of the first top sheet 11 and the second top sheet 12, and does not cover the first top sheet 11 and the second top sheet 12. not.

The back sheet 14 is a liquid impermeable sheet. As the back sheet 14, a laminated nonwoven fabric mainly made of polyethylene sheet, polypropylene, or the like, a breathable resin film, a spunbond, or a sheet in which a breathable resin film is bonded to a nonwoven fabric such as spunlace can be used.

The absorbent core 20 is disposed at least in the central region R3 and the rear region R2. Further, the absorbent core 20 may extend from the center region R3 to the front region R1. The absorbent core 20 contains an absorbent material that absorbs liquid. The absorbent core 20 may be wrapped by a core wrap. The absorbent material constituting the absorbent core 20 can be formed of, for example, hydrophilic fibers, pulp, and super absorbent polymer (SAP). The core wrap can be composed of, for example, a nonwoven fabric or a tissue sheet.

As described above, the absorbent article 1 has a blade 3 and a hip flap 4. The blade 3 and the hip flap 4 extend outward in the width direction W than the outer edge of the absorbent core 20 in the central region R3. The blade 3 and the hip flap 4 may be constituted by lamination of the top sheet 10 and the back sheet 14. The blade 3 is configured so that it can be folded back to the back sheet 14 side. The blades 3 are folded back to the non-skin surface side of the crotch portion of the underwear during use.

The hip flap 4 is located on the rear side of the blade 3 and is provided in the rear region R2. The hip flap 4 is not folded back during use and is disposed between the underwear and the buttocks of the wearer. In this embodiment, an absorbent material is not provided in the hip flap 4. Instead of this, the hip flap 4 may be provided with an absorbent material.

A free end 15 that is not bonded to the second top sheet 12 is provided on the outer edge of the first top sheet 11. The free end 15 is a region in which the non-skin-facing surface of the first top sheet 11 and the skin-facing surface of the second top sheet 12 are not bonded to each other, and the bonding area RA is not provided, Further, it may be a region in which the sheet pressing portion 18 is not provided. Further, in the configuration without the sheet pressing portion 18, the free end 15 may be an area in which the bonding area RA is not provided. Moreover, the outer edge is a peripheral edge of a member, and includes the front end edge and the rear edge in the front-rear direction, and the outer edge in the width direction.

In the bonding region RX, since the non-heat-fused fibers contained in the first surface sheet 11 are bonded to the second surface sheet 12, the non-heat-fused fibers can be made difficult to detach. Since the free end 15 is provided on the outer edge of the first top sheet 11, the rigidity of the outer edge 11E of the first top sheet 11 is not increased, and deterioration of the wearer's touch can be suppressed. I can.

Next, a configuration for suppressing the separation of the non-heat-sealed fibers from the surface sheet 10 of the absorbent article 1 configured as described above will be described. Since the outer edge 11E in the width direction of the first top sheet 11 is disposed on the side opposite the skin of the second top sheet 12, the wearer's legs prevent the first top sheet 11 from being worn. The outer edge 11E may rub. The non-heat fused fiber is not fused by heat compared to the heat fused fiber, and the bond between the fibers is liable to be weakened. Therefore, when the first surface sheet 11 including non-heat-fused fibers rubs against the wearer's leg, there is a concern that the non-heat-fused fibers may be separated. The absorbent article 1 is configured to suppress the separation of the non-heat-fused fibers in the surface sheet (the first surface sheet 11 in the present embodiment) having non-heat-fused fibers.

In a region where the first top sheet 11 and the second top sheet 12 overlap, a bonding region RX to which the first top sheet 11 and the second top sheet 12 are bonded is provided. The distance between the bonding region RX and the outer edge 11E of the first surface sheet 11 in the width direction W is shorter than the fiber length of the non-heat-fused fiber. Therefore, at least a part of the non-thermal fusion fiber is bonded in the bonding region RX. The non-heat fused fiber can be held by the bonding region RX, and it is possible to prevent the non-heat fused fiber from separating when the outer edge 11E of the first surface sheet 11 rubs against it. Moreover, it is preferable that the bonding region RX extends in the front-rear direction L. By providing the bonding region RX over the entire front-rear direction of the first surface sheet 11, it is possible to effectively prevent separation of the non-heat-fused fibers.

The bonding region RX is located inside the width direction W than the outer edge 11E of the first top sheet 11. A non-joined region RY extending inward in the width direction W from the outer edge 11E of the first top sheet 11 is provided. The distance between the bonding region RX and the width direction W of the outer edge 11E of the first top sheet 11 is the length in the width direction W of the non-joined region RY.

Next, the bonding region RX according to the present embodiment will be described in detail. 4 shows the bonding region RA of the first top sheet 11 and the second top sheet 12 and the sheet pressing portion 18. Actually, the bonding region RA and the sheet pressing portion 18 overlap in the thickness direction T, but for convenience of explanation, they are shown adjacent to each other in the front-rear direction. The bonding region RX is a region in which the first top sheet 11 and the second top sheet 12 are bonded, and specifically, the sheet crimp portion 18 and the bonding area RA are in the thickness direction T A region overlapping with, a region in which only the sheet pressing portion 18 is provided, and a region in which only the bonding region RA is provided. The non-bonded region RY is a region in which the sheet pressing portion 18 is not provided, and the adhesive region RA is not provided. In addition, in another aspect, the bonding region RX may be constituted by only the region in which the crimping portion is provided, or may be constituted by only the region in which the bonding region is provided.

In the bonding region RX, a sheet pressing portion 18 obtained by compressing (pressing) the first top sheet 11 and the second top sheet 12 may be provided. The sheet pressing portion 18 extends in the thickness direction of the first surface sheet 11 as well as the bonding of the non-skin facing surface of the first surface sheet 11 and the skin facing surface of the second surface sheet 12. It is easy to bond the first top sheet 11 and the second top sheet 12 over a certain range. Therefore, the non-heat fused fiber is bonded to the second surface sheet 12 in the bonding region RX, and separation of the non-heat fused fiber can be further suppressed.

Moreover, the sheet|seat crimping part 18 may be arrange|positioned in multiple spaces apart in the front-rear direction (L) or the width direction (W). The sheet pressing portion 18 according to the present embodiment extends in the front-rear direction (L), and is disposed at intervals in the width direction (W). Compared with the configuration in which the sheet pressing portions 18 are continuously arranged, the rigidity of the outer edge 11E of the first top sheet 11 is lowered, and the outer edge of the first top sheet 11 against the movement of the leg (11) It becomes easy to follow. Accordingly, friction between the outer edge 11E of the first surface sheet 11 and the leg can be suppressed, and the non-heat fused fibers of the first surface sheet 11 can be suppressed from being separated.

The bonding area RA may be provided in the bonding area RX. The bonding region RA has an adhesive that bonds the first top sheet 11 and the second top sheet 12 together. The sheet pressing portion 18 according to the present embodiment extends in the front-rear direction (L), and is disposed at intervals in the width direction (W). In the configuration in which the first top sheet 11 and the second top sheet 12 are bonded by an adhesive, it is difficult for heat or pressure to be applied to the first top sheet 11 at the time of bonding. Accordingly, breaking of the non-heat-fused fibers due to heat or the like during bonding can be suppressed, and separation of the fibers of the first surface sheet 11 can be further suppressed. In addition, the non-heat fused fiber is difficult to fusion by compression processing, and the bonding strength may be low. According to the adhesive, it becomes easy to obtain a desired bonding strength.

Both the bonding area RA and the sheet pressing part 18 may be provided in the bonding area RX. The bonding strength between the first surface sheet 11 and the second surface sheet is secured by the bonding area RA, and the thickness direction of the first surface sheet 11 and the second surface sheet is secured by the sheet pressing portion 18 A certain range of can be bonded, and separation of the non-heat-fused fibers can be more suppressed. Moreover, the bonding area|region RX may be provided at different pitches between the bonding area|region RA and the sheet|seat crimping part 18. Specifically, the pitch in the width direction of RA of the bonding region is shorter than the pitch in the width direction of the sheet crimp portion 18 and may be half the pitch of the sheet crimp portion 18 in the width direction. According to such a configuration, a region having strong adhesive strength in which both sides are overlapped and a region having low adhesive strength disposed only on one side are provided. While securing the flexibility of the surface sheet in a region having low adhesive strength, it is possible to maintain the bonded state of the non-heat-sealed fibers in a region having high adhesive strength.

Moreover, the 1st surface sheet may contain heat-fused fiber together with non-heat-fused fiber. Since the first surface sheet contains the heat-fused fibers, a fused portion is formed between the fibers by the fusion of the heat-fused fibers, and the non-heat-fused fibers are difficult to detach. Therefore, it is possible to more prevent separation of the heat-sealed fibers.

The 2nd topsheet 12 may contain a heat-sealed fiber. Since the second surface sheet 12 contains heat-fused fibers, a fusion portion is formed between the fibers by the fusion bonding of the heat-fused fibers, and the non-heat-fused fibers of the first surface sheet 11 are caught and separated from the fusion portion. It becomes difficult. Therefore, it is possible to more prevent the separation of the non-heat fused fiber.

As shown in FIG. 2, a side non-joined region RZ to which the outer edge 12E of the second top sheet 12 and the side sheet 13 are not joined may be provided. The outer edge 12E of the 2nd topsheet 12 is located outside the width direction than the 1st topsheet 11, and stands with respect to the side sheet 13 in the side non-bonding area RZ. . Therefore, when sandwiched by the wearer's leg, the outer edge 12E of the second top sheet 12 tends to contact the leg earlier than the outer edge 11E of the first top sheet 11. Separation of the non-heat fused fiber due to the outer edge 11E of the first top sheet 11 rubbing against the leg can be further prevented.

In the outer edge 12E of the second top sheet 12, a folded gold FL extending in the front-rear direction L of the second top sheet 12 may be formed. Since the second top sheet 12 is folded, it is easy to deform the folded gold FL as a starting point when it touches the wearer's leg. For example, in a configuration in which the folded second surface sheets are not bonded to each other, the folded second surface sheets are deformed so as to fall in the thickness direction and deformed inward in the width direction. When the second top sheet 12 is deformed, the contact with the first top sheet 11 is alleviated, and separation of the non-heat-fused fibers of the first top sheet 11 can be suppressed.

The outer edge 11E of the first top sheet 11 may be located inside the width direction W than the outer edge 20E of the absorbent core 20. When sandwiched by the wearer's leg, the outer edge 20E of the absorbent core 20 is more likely to contact the leg earlier than the outer edge 11E of the first surface sheet 11. Separation of the non-heat fused fiber due to the outer edge 11E of the first top sheet 11 rubbing against the leg can be further prevented.

(3) Configuration of absorbent article according to the second embodiment

Next, the absorbent article 1 according to the second embodiment will be described with reference to FIGS. 5 to 8. Description of the same contents as in the first embodiment described above will be omitted.

5 is a plan view of the absorbent article 1 according to the second embodiment as viewed from the side facing the skin. FIG. 6 is a cross-sectional view taken along line A-A shown in FIG. 5, and FIG. 7 is an enlarged view of portion B shown in FIG. 6. Fig. 8 is a plan view showing an adhesive region and a sheet pressing portion in the absorbent article according to the second embodiment.

The first surface sheet 11 may be formed so as to form convex wrinkles on the skin-facing surface side as shown in FIG. 6. By forming the corrugated portion, since the elongation in the width direction of the first surface sheet having low elongation can be increased by a convex shape, tearing of the first surface sheet can be reduced.

The first top sheet 11 and the second top sheet 12 may be provided with a pressing portion 60. The crimping portion 60 compresses at least the first top sheet 11 and the second top sheet 12 in the thickness direction. The crimping portion 60 may compress the first top sheet 11, the second top sheet 12, and the absorbent core 20 in the thickness direction. The crimping portion 60 of the present embodiment compresses the first top sheet 11, the second top sheet 12, and the absorbent core 20 in the thickness direction. In addition, the absorbent article 1 may further include a sheet crimp portion 18 obtained by compressing the first top sheet 11 and the second top sheet 12 apart from the crimp portion 60.

Next, a configuration for suppressing tearing of the top sheet of the absorbent article 1 configured as described above will be described. The absorbent article 1 is configured to suppress tearing of the surface sheet (the first surface sheet 11 in the present embodiment) having non-heat-fused fibers.

The first top sheet 11 and the second top sheet 12 are compressed in the thickness direction when the pressing portion 60 is formed, and a force exerted in the plane direction acts. At this time, in the configuration in which the entire first surface sheet 11 is bonded to the second surface sheet 12, the first surface sheet 11 has no degree of freedom in movement in the plane direction, and is stretched in the plane direction. There is a fear that it will burst due to the power that becomes. The free end 15 of the first surface sheet 11 is easily movable in the planar direction, and can move toward the crimping portion 60 when it is compressed in the thickness direction at the time of forming the crimping portion 60. Accordingly, the force in the tensile direction relative to the first surface sheet 11 is reduced when forming the pressing portion 60, and tearing of the first surface sheet 11 having non-heat fused fibers such as cotton fibers can be suppressed. have.

In particular, as in the present embodiment, in the configuration in which the first top sheet 11, the second top sheet 12, and the absorbent core 20 have the compressed portion 60, the first top sheet 11 and Compared with the configuration in which only the second top sheet 12 is compressed, the degree of compression is stronger, and the first top sheet 11 is more likely to burst. Therefore, it is preferable to suppress tearing of the first top sheet 11 by the free end 15.

Next, the free end 15 will be described in detail. FIG. 8 shows the bonding region RA of the first top sheet 11 and the second top sheet 12, and the sheet pressing portion 18. Actually, the bonding region RA and the sheet pressing portion 18 overlap in the thickness direction, but for convenience of explanation, they are shown adjacent to each other in the front-rear direction. The bonding area RA is an area to which the adhesive of the first top sheet 11 and the second top sheet 12 is applied. The bonding regions RA extend in the front-rear direction L, and may be provided in a plurality with an interval in the width direction. The length of the adhesive region RA in the width direction may be longer than the interval in the width direction of the adhesive region RA. In another aspect, the bonding region RA extends in the width direction W, and may be provided in a plurality with an interval in the front-rear direction L.

The sheet pressing portions 18 extend in the front-rear direction (L), and may be provided in plural with an interval in the width direction (W). The length of the sheet crimping portion 18 in the width direction may be shorter than the interval of the sheet crimping portion 18 in the width direction. In another aspect, the bonding region RA extends in the width direction W, and may be provided in a plurality with an interval in the front-rear direction L.

A region where the sheet pressing portion 18 and the bonding region RA overlap in the thickness direction and a region that does not overlap in the thickness direction may be provided. A region in which the sheet pressing portion 18 and the bonding region RA do not overlap in the thickness direction constitutes the non-bonding region RY. The area where the sheet crimp portion 18 and the bonding area RA overlap in the thickness direction, the area in which only the sheet crimp portion 18 is provided, and the area in which only the bonding area RA is provided constitute the bonding area RX.

The bonding region RA may be located inside the outer edge of the first top sheet 11. That is, the bonding region RA may be located inside the width direction than the outer edge 11E in the width direction of the first surface sheet 11, and outside the front-rear direction L of the first surface sheet 11 It may be located inside the front-rear direction than the far edge 11F. Further, the bonding region RA positioned outside the most widthwise direction may be positioned outside the sheet pressing portion 18 positioned outside the most widthwise direction in the width direction. In such a configuration, the free end 15 becomes a region between the outer edge 11E of the first top sheet 11 and the bonding region RA located outside the most widthwise direction. Further, the bonding region RA positioned outside the most front-rear direction may be positioned outside the width direction than the sheet pressing portion 18 positioned outside the most front-rear direction. In such a configuration, the free end 15 becomes a region between the outer edge 11F of the first surface sheet 11 and the bonding region RA located outside the front-rear direction.

The free end 15 includes the outer edge 11E in the width direction of the first top sheet 11 and may extend in the front-rear direction L. In general, the absorbent article 1 has a length in the front-rear direction (L) longer than that in the width direction (W). Therefore, by providing the free end 15 on the outer edge 11E of the first top sheet 11, it is easy to secure the area of the free end 15, and further suppresses tearing of the first top sheet 11 can do.

The free end 15 may overlap the absorbent core 20 in the thickness direction T. Since the crimping portion 60 is formed on the absorbent core 20 and the free end 15 is overlapped with the absorbent core 20, the crimping portion 60 and the free end 15 are easily disposed close to each other. By disposing the free end 15 for alleviating the force in the tensioning direction near the crimping portion 60, it is possible to more suppress the first surface sheet 11 from bursting.

A plurality of bonding regions RA may be provided at intervals. In the bonding area RA, the first top sheet 11 and the second top sheet 12 are bonded, and in the area between the bonding areas RA, the first top sheet 11 and the second top sheet 12 ) Are not joined. Therefore, when a force to be pulled is applied, there are a portion that is easy to move (a region between the adhesive regions) and a portion that is difficult to move (a region between the adhesive regions). When a tensile force is applied, the part that is difficult to move is moved to the starting point. By providing a plurality of such regions, the force in the tensile direction can be more relaxed in a wide range of the first surface sheet, and tearing of the first surface sheet 11 can be further suppressed.

The crimping portion 60 may be located inside the outer edge of the first top sheet 11. That is, the crimping portion 60 may be located inside the width direction than the outer edge of the first surface sheet 11 in the width direction, and before and after the outer edge of the first surface sheet 11 in the front and rear direction L It may be located inside the direction. The crimping part 60 may have a first crimping part 61 and a second crimping part 62.

The first crimping portion 61 may be disposed at the free end 15. In the case of forming the first pressing portion 61 at the free end, the area where the first surface sheet 11 and the second surface sheet 12 are not bonded is compressed to form the first pressing portion 61 do. Since the first surface sheet 11 and the second surface sheet 12 are not joined at least around the first pressing portion 61, the force in the tension direction acting on the first surface sheet 11 is relieved. can do. Therefore, it is possible to more suppress the first surface sheet from bursting. Moreover, the 2nd crimping part 62 may be provided in the bonding area|region RX to which the 1st surface sheet and the 2nd surface sheet were bonded.

The first pressing portion 61 may extend over the free end 15 and a region outside the first top sheet 11. At least the side sheet 13 may be disposed outside the first surface sheet 11. Compared with the configuration in which the entire first pressing portion 61 is formed on the first surface sheet, the force in the tensioning direction acting on the first surface sheet when the first pressing portion 61 is formed is alleviated. Therefore, it is possible to more suppress the first surface sheet from bursting.

The crimping portion 60 may be concave from the first top sheet 11 side toward the second top sheet 12 side. The force compressed by the pressing portion 60 is applied from the first top sheet 11 side to the second top sheet 12 side. Since the free end 15 is provided on the sheet located on the side to which the force is applied (the side facing the skin), the force in the tensile direction can be more relaxed, and tearing of the first surface sheet 11 can be further suppressed. I can.

The crimping portions 60 may be arranged in pairs at an interval in plan view. The interval between the pair of crimping parts 60 does not need to be constant. That is, as shown in FIG. 5, a first region R11 with a narrow gap between the pair of crimping portions 60 and a gap between the pair of crimping portions 60 is wider than that of the first region R11. You may have a second region R12. In a portion where the distance between the crimp portions 60 is wide, the length of the first surface sheet in the portion is long, so that the force in the tension direction at the time of formation of the crimp portions 60 acts weakly. On the other hand, in a portion where the distance between the pressing portions 60 is narrow, since the length of the first surface sheet 11 in the portion is short, the force in the tension direction at the time of formation of the pressing portion 60 acts strongly. . Since the portion where the tensile force acts strongly and the portion that acts weakly are mixed, the force is not concentrated compared to the case where the force is applied evenly, and the bursting of the first surface sheet can be further suppressed.

The elongation of the second top sheet 12 may be higher than the elongation of the first top sheet 11. Since the second surface sheet 12 is higher than the elongation of the first surface sheet 11, even when a sheet having a relatively low elongation is used for the first surface sheet 11 and the first surface sheet is bonded, the surface It is possible to suppress a decrease in the elongation of the entire sheet and reduce tearing of the first surface sheet.

In addition, the elongation can be measured using a tensile tester (autograph manufactured by Shimadzu Corporation). Specifically, a test piece obtained by cutting the first and second surface sheets into a size of 25 mm x 40 mm is cut, and separated by maintaining the joint at a low temperature so that each material does not extend. After setting the distance between the measurement terminals of the tensile tester to 20 mm, it is measured under the conditions of setting a tensile speed of 100 mm/min, and the value of the elongation at break is obtained. The measurement is performed three times, and the average value is taken as the elongation of each sheet.

As mentioned above, although this invention was demonstrated in detail using the above-mentioned embodiment, it is clear to those skilled in the art that this invention is not limited to the embodiment described in this specification. The present invention can be implemented as a modified and changed aspect without departing from the spirit and scope of the present invention determined by the description of the claims. Accordingly, the description of the present specification is for illustrative purposes only, and does not have any limiting meaning with respect to the present invention.

Industrial availability

It is possible to provide an absorbent article capable of suppressing deterioration of the wearer's touch while suppressing the separation of the non-heat-fused fibers.

1: absorbent article 11: first surface sheet (surface sheet)
11E: outer edge 12: second surface sheet (surface sheet)
12E: outer edge 13: side sheet (surface sheet)
18: pressing portion 20: absorbent core
20E: outer edge R1: anterior region
R2: rear area R3: center area
RA: bonding area RX: bonding area
RY: non-junction area RZ: side non-junction area

Claims (20)

Forward and backward directions,
A width direction orthogonal to the front-rear direction, and
With a surface sheet,
Having an absorbent core disposed on the non-skin facing side of the top sheet,
The top sheet is an absorbent article having a first top sheet comprising a non-heat-sealed fiber and a second top sheet positioned on a side of the non-skin facing side of the first top sheet,
The outer edge in the width direction of the first top sheet is disposed on the side of the second top sheet facing the skin,
A bonding region in which the first surface sheet and the second surface sheet are joined is provided,
An absorbent article, wherein a free end portion not bonded to the second top sheet is provided on an outer edge of the first top sheet. The method of claim 1,
The absorbent article, wherein a distance in the width direction between the bonding region and the outer edge of the first surface sheet is shorter than a fiber length of the non-heat-fused fiber. The method according to claim 1 or 2,
The absorbent article, wherein a pressing portion obtained by compressing the first top sheet and the second top sheet is provided in the bonding region. The method of claim 3,
The absorbent article, wherein the pressing portions are arranged at intervals in the front-rear direction or the width direction. The method according to any one of claims 1 to 4,
The absorbent article, wherein an adhesive for bonding the first top sheet and the second top sheet is provided in the bonding region. The method according to any one of claims 1 to 5,
The absorbent article, wherein the first surface sheet contains heat-sealed fibers. The method according to any one of claims 1 to 6,
The absorbent article, wherein the second surface sheet contains heat-sealed fibers. The method according to any one of claims 1 to 7,
A side sheet covering the outer edge of the absorbent article is disposed on the side of the second surface sheet facing the non-skin portion,
The outer edge of the second top sheet is located outside the outer edge of the first top sheet in the width direction,
An absorbent article having an outer edge of the second top sheet and a side non-bonded region in which the side sheet is not bonded. The method of claim 8,
The second surface sheet is folded based on the folded gold along the front-rear direction,
The folded gold is provided on an outer edge of the second top sheet. The method according to any one of claims 1 to 9,
The absorbent article, wherein the outer edge of the first top sheet is located inside the width direction than the outer edge of the absorbent core. The method of claim 1,
At least the first surface sheet and the second surface sheet are compressed in a thickness direction, and a pressing portion is provided,
At least a part of the bonding region is a region in which the pressing portion is provided. The method of claim 11,
The absorbent article in which the first surface sheet, the second surface sheet, and the absorbent core are compressed in the pressing portion. The method of claim 12,
The absorbent article, wherein the free end overlaps the absorbent core in a thickness direction. The method according to any one of claims 11 to 13,
The free end portion includes an outer edge of the first surface sheet in the width direction, and extends in the front-rear direction. The method according to any one of claims 11 to 14,
The absorbent article, wherein the pressing portion is concave from the first top sheet side toward the second top sheet side. The method according to any one of claims 11 to 15,
The absorbent article having an elongation of the second top sheet higher than that of the first top sheet. The method according to any one of claims 11 to 16,
An adhesive region having an adhesive for bonding the first surface sheet and the second surface sheet is provided inside the free end,
The absorbent article, wherein a plurality of the adhesive regions are provided at an interval. The method according to any one of claims 11 to 17,
The absorbent article, wherein the crimp portion has a first crimp portion disposed at the free end. The method of claim 18,
The absorbent article, wherein the first pressing portion extends over the free end portion and a region outside the first surface sheet. The method according to any one of claims 11 to 19,
The crimping portions are arranged in pairs with an interval in a plane view,
The absorbent article, wherein the interval between the pair of pressing portions is not constant.

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