TW201936148A - Absorbent article - Google Patents

Abstract

An absorbent article 1 has a topsheet 10 and an absorbent core 20 disposed on a non-skin-facing surface side of the topsheet 10. The topsheet 10 has: a first topsheet 11 comprising non-heat-sealed fibers; and a second topsheet 12 positioned on the non-skin-facing surface side of the first topsheet 11. An outer edge 11E of the first topsheet 11 in the width direction W is disposed on a skin-facing surface side of the second topsheet 12. There is provided a bonding region RX where the first topsheet 11 and the second topsheet 12 are bonded together. An outer rim of the first topsheet 11 is provided with a free end part 15 that is not bonded to the second topsheet 12.

Description

Absorbent article

The present invention relates to an absorbent article such as a sanitary napkin.

Patent Document 1 discloses an absorbent article such as a sanitary napkin. In the absorbent article of Patent Document 1, a plurality of surface sheets are provided on the skin facing surface side of the absorbent chip.
The surface sheet includes a first surface sheet (a surface sheet of Patent Document 1) and a second surface sheet (a heat-fusible fiber sheet of Patent Document 1) that overlaps the first surface sheet in the thickness direction. The first surface sheet is composed of a non-woven fabric (specifically, a cotton non-woven fabric) containing non-heat-fusible fibers. The first surface sheet is joined to the second surface sheet by a plurality of embossing. Thereby, since the non-heat-fusible fiber is joined to the second surface sheet, it is possible to prevent the non-heat-fusible fiber from falling off.
[Previous Technical Literature]
[Patent Literature]

[Patent Document 1] Japanese Invention Patent No. 5074913

[Problems to be solved by the invention]

In the absorbent article of Patent Document 1, the outer edge of the first surface sheet is joined to the back sheet in the outer side in the width direction of the absorbent sheet (refer to the second drawing of Patent Document 1). Since the outer edge of the first surface sheet joined to the back sheet has high rigidity, the wearer's foot rubs against the outer edge of the first surface sheet, and the wearer's skin is worn when the wearer walks. The problem of deterioration of touch.

Therefore, it is desirable to suppress an absorbent article in which the wearer's skin feels deteriorated while suppressing the detachment of the non-heat-fused fibers.

[Means to solve problems]

An absorbent article according to one aspect includes: a front-back direction, a width direction orthogonal to the front-rear direction, a surface sheet, and an absorption chip disposed on a non-skin opposing surface side of the surface sheet; the surface sheet, The first surface sheet containing the non-heat-fused fibers and the second surface sheet located on the non-skin opposing surface side of the first surface sheet; and the outer edge of the first surface sheet in the width direction is disposed The skin surface of the second surface sheet facing the surface of the second surface sheet is provided with a joint region where the first surface sheet and the second surface sheet are joined, and the outer surface of the first surface sheet is provided with the second surface The free end of the surface sheet joint.

(1) Outline of Embodiments At least the following matters are apparent from the description of the patent specification and the accompanying drawings.

An absorbent article according to one aspect includes: a front-back direction, a width direction orthogonal to the front-rear direction, a surface sheet, and an absorption chip disposed on a non-skin opposing surface side of the surface sheet; the surface sheet, The first surface sheet containing the non-heat-fused fibers and the second surface sheet located on the non-skin opposing surface side of the first surface sheet; and the outer edge of the first surface sheet in the width direction is disposed a skin facing surface side of the second surface sheet; a joint region where the first surface sheet and the second surface sheet are joined; and an outer edge of the first surface sheet: not provided with the second surface The free end of the sheet joint.

According to this aspect, since the non-heat-fusible fibers contained in the first surface sheet are bonded to the second surface sheet in the joint region, it is possible to prevent the non-heat-fusible fibers from falling off. Since the outer edge of the first surface sheet is provided with the free end portion, the rigidity of the outer edge of the first surface sheet is not increased, and deterioration of the skin feel of the wearer can be suppressed.

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

In the absorbent article of Japanese Laid-Open Patent Publication No. Hei 10-118118, the surface sheet is folded in the width direction. The folded portion of the surface sheet is not bonded to the sheet on the non-skin facing side of the surface sheet, and is configured to stand up toward the wearer side. The front end of the folded portion is disposed outward in the width direction. The folded portion is configured to be erectable toward the wearer's side and disposed between the feet when worn. Therefore, when the wearer walks or the like, the front end of the folded portion of the surface sheet is rubbed by the wearer's foot. By the surface sheet being repeatedly rubbed by the foot, there is a possibility that the fibers constituting the surface sheet fall off. In particular, as in the case of the non-thermally-fused fiber sheet, the fiber tends to have no tendency to fall off because the fiber does not have heat-melting properties, as in the case of Japanese Laid-Open Patent Publication No. Hei 10-118118. Therefore, it is desirable to suppress the detachment of the non-heat-fusible fiber located on the outer edge in the width direction of the surface sheet.

According to a preferred embodiment, the distance between the joint region and the outer edge of the first surface sheet in the width direction is shorter than the fiber length of the non-heat-fusible fiber, so that at least a portion of the non-heat-fused fiber is easily formed. The joint area is joined. Therefore, when the outer edge of the first surface sheet is rubbed by the non-heat-fusible fiber in the joint region, the non-heat-fused fiber can be prevented from falling off.

According to a preferred aspect, a press portion for compressing the first surface sheet and the second surface sheet is provided in the joint region.

According to the press portion, not only the non-skin facing surface side of the first surface sheet but also the skin facing surface side of the second top sheet is stretched over a certain range extending in the thickness direction of the first surface sheet, and the first surface sheet is easy. Engaged. Therefore, in the joint region, the non-heat-fusible fibers are more likely to be bonded to the second surface sheet.

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

The rigidity of the outer edge of the first surface sheet is lowered as compared with the configuration in which the press portion is continuously disposed, and the outer edge of the first surface sheet is easily fitted to the operation of the foot. Therefore, the friction between the outer edge of the first surface sheet and the foot is suppressed, and the non-heat-fused fibers of the first surface sheet can be prevented from falling off.

According to a preferred embodiment, the first surface sheet and the second surface sheet to be described above are provided in the bonding region.

In the configuration in which the first surface sheet and the second surface sheet are joined by the adhesive, heat or pressure is hard to apply to the first surface sheet at the time of bonding. Therefore, the breakage of the non-heat-fusible fiber by the heat or the like at the time of joining is suppressed, and the fall of the fiber of the first surface sheet can be suppressed more.

According to a preferred embodiment, the first surface sheet contains heat-fusible fibers.

Since the first surface sheet contains the heat-fusible fiber, the fusion portion is formed between the fibers by the fusion of the heat-fused fibers, and the non-heat-fusible fibers are less likely to fall off.

According to a preferred embodiment, the second surface sheet contains heat-fusible fibers.

Since the second surface sheet contains the heat-fusible fiber, the fusion portion is formed between the fibers by the fusion of the heat-fusible fibers, and the non-heat-fused fibers of the first surface sheet are stuck to the fusion portion, which makes it difficult to form a fusion portion. Fall off.

According to a preferred aspect, a side sheet covering the outer edge of the absorbent article is disposed on a non-skin facing side of the second top sheet, and an outer edge of the second sheet is located on the first surface. The outer edge of the sheet is closer to the outer side in the width direction, and has a side non-joining region in which the outer edge of the second surface sheet is not joined to the side sheet.

The outer edge of the second top sheet is located outside the first surface sheet in the width direction, and the side non-joining area is raised with respect to the side sheet. Therefore, when the wearer's foot is caught, the outer edge of the second surface sheet is likely to abut against the foot first, compared to the outer edge of the first surface sheet. Further, it is possible to prevent the non-heat-sealing fibers from falling off due to the friction between the outer edge of the first surface sheet and the foot.

According to a preferred aspect, the second surface sheet is folded along a crease in the front-rear direction, and the crease is provided on an outer edge of the second surface sheet.

Since the second surface sheet is folded, it is easily deformed by the crease as a base point when it abuts against the wearer's foot. By the deformation of the second surface sheet, the feeling of the first surface sheet is relaxed, and the falling of the non-heat-fusible fibers of the first surface sheet can be suppressed.

According to a preferred embodiment, the outer edge of the first surface sheet is located on the inner side closer to the width direction than the outer edge of the absorbing chip.

When sandwiched by the wearer's foot, the outer edge of the absorbent chip is more likely to abut the foot first than the outer edge of the first surface sheet. Further, it is possible to prevent the non-heat-sealing fibers from falling off due to the friction between the outer edge of the first surface sheet and the foot.

According to a preferred embodiment, at least a press portion for compressing the first surface sheet and the second surface sheet in the thickness direction is provided.

The free end portion of the first surface sheet is easy to move with respect to the plane direction, and is movable toward the press portion side when it is compressed in the thickness direction when the press portion is formed. Therefore, the force applied to the stretching direction of the first surface sheet can be reduced when the press portion is formed, and the first surface sheet can be prevented from being cracked.

According to a preferred embodiment, the press portion compresses the first surface sheet, the second surface sheet, and the absorption chip.

The first surface sheet, the second surface sheet, and the absorbing sheet are compressed. Compared with the configuration in which only the first surface sheet and the second surface sheet are compressed, the degree of compression is strong, and the first surface sheet is more likely to be ruptured. Therefore, it is preferable to suppress the crack of the first surface sheet by the free end portion.

According to a preferred embodiment, the free end portion overlaps the absorption chip in the thickness direction.

Since the press portion is formed on the absorption chip and the free end portion is overlapped with the absorption chip, the press portion and the free end portion are easily disposed in the vicinity. By disposing the free end portion of the force in the stretching direction, it is disposed in the press portion, and the first surface sheet can be prevented from being cracked.

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

By providing the free end portion on the outer edge of the first surface sheet, it is easy to secure the area of the free end portion, and it is possible to suppress the crack of the first surface sheet.

According to a preferred embodiment, the press portion is recessed from the first surface sheet side toward the second surface sheet side.

The force compressed by the press section is applied from the first surface sheet toward the second surface sheet side. Since the free end portion is provided on the side where the force is applied (the skin facing surface side), the force in the stretching direction is more moderated, and the crack of the first surface sheet can be suppressed.

According to a preferred embodiment, the elongation of the second surface sheet is higher than the elongation of the first surface sheet.

Since the second surface sheet has a higher elongation than the first surface sheet, when the first surface sheet is used and the sheet having a low elongation is joined, the elongation of the entire sheet sheet can be suppressed from being lowered, and the first surface can be reduced. The rupture of the sheet.

According to a preferred embodiment, the adhesion region having the adhesive between the first surface sheet and the second surface sheet is provided on the inner side of the free end portion, and the second region is provided at a plurality of intervals.

In the succeeding region, the first surface sheet is joined to the second surface sheet; and in the region between the subsequent regions, the first surface sheet and the second surface sheet are not joined. Therefore, there are a portion that is easy to move when a tensile force is applied (a region between the regions), and a portion that is difficult to move (the following region). When a tensile force is applied, the portion that is easy to move moves with the portion that is difficult to move as a base point. By providing the plurality of regions, the force in the stretching direction can be more relaxed in a wider range of the first surface sheet 11, and the cracking of the first surface sheet can be suppressed.

According to a preferred embodiment, the press portion has a first press portion disposed at the free end.

When the first press portion is formed at the free end portion, the region where the first surface sheet and the second surface sheet are not joined is compressed to form the first press portion. Since the first surface sheet and the second surface sheet are not joined at least around the first press portion, the force acting in the stretching direction of the first surface sheet can be alleviated. Therefore, cracking of the first surface sheet can be suppressed more.

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

In comparison with the configuration in which the entire first press portion is formed on the first surface sheet, the force acting on the stretching direction of the first surface sheet can be alleviated at the time of forming the first press portion. Therefore, cracking of the first surface sheet can be suppressed more.

According to a preferred embodiment, the press portions are arranged in a pair at intervals, and the interval between the pair of press portions is not constant.

In the portion where the press portions are spaced apart from each other, since the length of the first surface sheet located in the portion is long, the force in the stretching direction at the time of forming the press portion is weak. On the other hand, in the portion where the press portions are narrowly spaced from each other, since the length of the first surface sheet located in the portion is short, the force in the stretching direction at the time of forming the press portion is strong. Since the portion where the tensile force is strong is mixed with the weaker portion, the force application is not concentrated, and the first surface sheet is prevented from being cracked, as compared with the field where the force is equally applied.

(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 a sanitary napkin, a cotton pad for a weekday, a breast milk pad, an incontinence cotton pad for adults, a fecal cotton pad or an absorbent article such as a sweat-absorbent sheet. In particular, the absorbent article may be an article that is attached to the inside of a wearing article such as a user's underwear.

In the following description, the same or similar parts are denoted by the same or similar symbols. However, it is also necessary to leave the intent as shown in the model, and the ratio of each size may be different from the reality. Therefore, the specific dimensions, etc., should be judged with reference to the following description. In addition, there may be situations in which the relationship between the dimensions and the ratios of the dimensions may be included in the drawings.

Fig. 1 is a plan view of the absorbent article 1 according to the first embodiment as seen from the skin facing side. Here, the "skin facing side" corresponds to the side of the skin facing the wearer during use. "Non-skin facing side" is equivalent to the side opposite to 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 a portion B shown in Fig. 2. Fig. 4 is a plan view showing the succeeding region and the sheet press portion of the absorbent article according to the first embodiment.

The absorbent article 1 is provided with a front-rear direction L and a width direction W. The front-rear direction L is a direction extending from the front side (ventral side) of the wearer toward the rear side (back side) or a direction extending from the rear side of the wearer toward the front side. The width direction W is a direction orthogonal to the front-rear direction L.

The absorbent article 1 includes a front side domain R1, a rear side domain R2, and a central domain R3. The central region R3 includes a drain abutment portion R33 that faces the discharge port of the wearer (for example, a cornice). When the absorbent article 1 is attached to the undergarment, the central region R3 is located at the lower portion of the undergarment of the undergarment. That is, the excretory opening abutment portion R33 is a region disposed under the buttocks of the wearer, that is, between the wearer's feet.

The front side domain R1 is located at the front side of the central domain R3. The front end edge of the front side region R1 regulates the front end edge of the absorbent article 1. The rear side domain R2 is located closer to the rear side than the central domain R3. The rear end edge of the rear side region R2 regulates the rear end edge of the absorbent article 1. The length of the front-back direction L of the rear side region R2 can be longer than the length of the front-back direction L of the central region R3.

In the central region R3, a side flap 3 to be described later can be provided. Further, in the rear side region R2, the hip side wing portion 4 which is swollen outward in the width direction W may be provided. The front end edge of the side flap 3 is defined by the base portion of the side flap 3, and is a portion corresponding to the front side among the two portions recessed toward the inner side in the width direction W. The front end edge of the side flap 3 may also define a boundary between the central domain R3 and the front side domain R1. The rear end edge of the side flap 3 is defined by the base portion of the side flap 3, and the two portions recessed toward the inner side in the width direction W are equivalent to the portion located on the rear side. The rear end edge of the side flap 3 may also define the boundary between the central domain R3 and the rear side domain R2.

The absorbent article 1 includes a top sheet 10 facing the wearer's skin, a back sheet 14 facing the wearer's skin, and an absorbent chip 20 disposed between the surface sheet 10 and the back sheet 14. The surface sheet 10 is disposed closer to the skin facing side T1 than the absorbent chip 20. The back sheet 14 is disposed closer to the non-skin facing side T2 than the absorption chip 20. The absorbing chip 20 is disposed between the surface sheet 10 and the back sheet 14.

The surface sheet 10 is a liquid permeable sheet that permeates a liquid such as a body fluid. The surface sheet 10 covers the central portion of the absorption chip 20 in the width direction W. The surface sheet 10 may extend in the front-rear direction L from the front side domain R1 to the rear side domain R2. The surface sheet 10 may include a first surface sheet 11 and a second surface sheet 12 on the non-skin opposing surface side of the first surface sheet 11.

The first surface sheet 11 contains non-heat-fused fibers. Non-heat-fused fibers can be exemplified as cotton fibers. The first surface sheet 11 is formed by interlacing 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, and the fibers become difficult to interweave with each other, and the strength cannot be obtained. Where the fiber length of the cotton fiber exceeds 80 mm, there are cases where several of the fibers extend in the width direction, resulting in the possibility that the fiber crosses from the edge of the wearer's thigh to the other side of the thigh. At this time, the liquid excrement adhering to the central portion in the width direction W of the absorbent article 1 is diffused to the two leg portions by the diffusion effect of the liquid of the water retentive fiber, which may give the wearer an uncomfortable feeling. The fiber length is preferably 15 to 60 mm, more preferably 20 to 40 mm. The basis weight (unit weight) of the cotton non-woven fabric is 20 to 150 g/m ² . Further, the first surface sheet 11 may have a two-layer structure. It is also possible to have heat-fusible fibers in the lower layer of the first surface sheet 11. The elongation at break of the first surface sheet 11 may be 30 to 60 N/25 mm in the direction of orientation of the fibers; or may be set in the direction of the orientation of the fibers and the direction of the orthogonal direction of the fibers. After 20 mm, it was measured under the set conditions of a tensile speed of 100 mm/min, and the strength at break was 5 to 10 N/25 mm.

The second surface sheet 12 contains heat-fused fibers. The second surface sheet 12 is formed by fusion of heat-fusible fibers. The surface sheet 10 may further be provided with a side sheet 13. The side sheet 13 extends outside the first surface sheet 11 and the second surface sheet 12 in the width direction. The side sheet 13 is disposed on the non-skin facing surface side of the first top sheet 11 and the second top sheet 12, and does not cover the first surface sheet 11 and the second surface sheet 12.

As shown in FIG. 3, the first surface sheet 11 and the second surface sheet 12 are laminated in the thickness direction T. The first surface sheet 11 and the second surface sheet 12 are joined to each other in the joint region RX. In a region where the first top sheet 11 and the second top sheet 12 overlap, the joint region RX in which the first top sheet 11 and the second top sheet 12 are joined, and the first front sheet 11 and the second surface sheet 12 are not provided. Bonded non-joining area RY. At least a part of the non-joining region RY constitutes a free end portion 15 which will be described later.
The surface sheet 10 may also be further provided with a side sheet 13. The side sheet 13 extends outside the first surface sheet 11 and the second surface sheet 12 in the width direction. The side sheet 13 covers the outer edge of the absorbent article. The side sheet 13 is disposed on the non-skin facing surface side of the first top sheet 11 and the second top sheet 12, and does not cover the first surface sheet 11 and the second surface sheet 12.

The back sheet 14 is a liquid-impermeable sheet. As the back sheet 14, a laminated nonwoven fabric made of a polyethylene sheet, polypropylene or the like, an air-permeable resin film, a non-woven fabric such as a spunbond or a spunlace, and a breathable resin film can be used. Sheets and the like.

The absorption chip 20 is disposed in at least the central region R3 and the rear domain R2. Further, the absorption chip 20 may extend from the central region R3 to the front side region R1. The absorption chip 20 contains an absorbent material that absorbs liquid. The absorption chip 20 can also be covered by a chip film. The absorbing material constituting the absorption chip 20 can be formed, for example, of hydrophilic fibers, pulp, and superabsorbent polymer (SAP). The die film can be composed, for example, of a non-woven fabric or a fiber paper sheet.

As described above, the absorbent article 1 includes the side flaps 3 and the hip side flap portions 4. The side flaps 3 and the hip side wing portions 4 extend outward in the width direction W from the outer edge of the absorbent core 20 of the center region R3. The side flaps 3 and the hip side flaps 4 are formed by laminating the front sheet 10 and the back sheet 14. The side flaps 3 can be formed to fold over the side of the back sheet 14. The side flaps 3 are folded over the non-skin facing side of the crotch of the undergarment during use.

The hip side wing portion 4 is located closer to the rear side than the side flaps 3 and is disposed in the rear side region R2. The hip side flaps 4 are not folded during use and are disposed between the undergarments and the wearer's buttocks. In the present embodiment, the absorbent material is not provided in the buttocks 4 . Instead, an absorbent material may be provided on the buttocks 4 .

A free end portion 15 that is not joined to the second surface sheet is provided on the outer edge of the first surface sheet 11. The free end portion 15 may be a region where the non-skin facing surface of the first top sheet 11 and the skin facing surface of the second top sheet 12 are not joined, and the succeeding region RA is not provided, and the sheet press portion 18 is not provided. region. Further, in the configuration in which the sheet press portion 18 is not provided, the free end portion 15 may be a region in which the succeeding region RA is not provided. Further, the outer edge is a peripheral end of the member, and includes a front end edge and a rear end edge in the front-rear direction, and an outer side edge in the width direction.

In the joint region RX, since the non-heat-fusible fibers contained in the first surface sheet 11 are joined to the second surface sheet 12, it is possible to prevent the non-heat-fusible fibers from falling off. Since the outer edge of the first surface sheet 11 is provided with the free end portion 15, the rigidity of the outer edge 11E of the first surface sheet 11 does not become high, and deterioration of the skin feel of the wearer can be suppressed.

Next, a configuration for suppressing the detachment of the non-heat-sealing fibers of the surface sheet 10 of the absorbent article 1 thus constituted will be described. Since the outer edge 11E of the first surface sheet 11 in the width direction is disposed on the skin facing surface side of the second surface sheet 12, the outer edge 11E of the first surface sheet 11 may be rubbed by the wearer's foot when worn. Non-heat-fused fibers are not melted by heat compared with heat-fused fibers, and the bond between fibers is apt to become weak. Therefore, if the first surface sheet 11 containing the non-heat-fused fibers is rubbed against the wearer's foot, the non-heat-fused fibers are detached. The absorbent article 1 is configured to suppress the detachment of the non-heat-fused fibers located on the surface sheet having the non-heat-fusible fibers (the first surface sheet 11 in the embodiment of the present embodiment).

In a region where the first surface sheet 11 and the second surface sheet 12 overlap, a joint region RX in which the first surface sheet 11 and the second surface sheet 12 are joined is provided. The distance between the joint 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-fusible fiber. Therefore, at least a portion of the non-heat-fused fibers are joined at the joint region RX. When the non-heat-fusible fiber can be held by the joint region RX, when the outer edge 11E of the first surface sheet 11 is rubbed, the non-heat-fused fiber can be prevented from falling off. Further, it is preferable that the joint region RX extends in the front-rear direction L. By providing the joint region RX across the entire front-rear direction of the first surface sheet 11, it is possible to effectively prevent the non-heat-sealing fibers from falling off.

The joint region RX is located on the inner side closer to the width direction W than the outer edge 11E of the first surface sheet 11. A non-joining region RY extending inward in the width direction W is provided from the outer edge 11E of the first surface sheet 11. The distance between the joint region RX and the width direction W of the outer edge 11E of the first surface sheet 11 is the length of the non-joining region RY in the width direction W.

Next, the joint region RX of the present embodiment will be described in detail. 4 shows the first surface sheet 11 and the succeeding region RA of the second surface sheet 12 and the sheet press portion 18. Actually, the succeeding region RA and the sheet press portion 18 are overlapped in the thickness direction T, but the convenience of the description is shown in a state in which the front-rear direction is adjacent. The joint region RX is a region where the first surface sheet 11 and the second surface sheet 12 are joined, and specifically, the region where the sheet press portion 18 and the succeeding region RA overlap in the thickness direction T includes: only the sheet press portion is provided The area of 18, and the area where only the area RA is provided. The non-joining region RY is a region where the sheet press portion 18 is not provided and the following region RA is not provided. Further, in another embodiment, the joint region RX may be formed by a region in which only the press portion is provided, or may be formed by a region in which only the succeeding region is provided.

A sheet press portion 18 that compresses (compresses) the first surface sheet 11 and the second surface sheet 12 may be provided in the joint region RX. The sheet press portion 18 is not only the joint between the non-skin facing surface of the first top sheet 11 and the skin facing surface of the second top sheet 12, but also extends over a certain range extending in the thickness direction of the first sheet sheet 11, and is easy to be 1 The surface sheet 11 is joined to the second surface sheet 12. Therefore, in the joint region RX, the non-heat-fusible fibers are joined to the second surface sheet 12, and the fall of the non-heat-fusible fibers can be suppressed.

Further, the sheet press portion 18 may be disposed at a plurality of intervals in the front-rear direction L or the width direction W. The sheet press portion 18 according to the present embodiment extends in the front-rear direction L and is disposed at intervals in the width direction W. The rigidity of the outer edge 11E of the first surface sheet 11 is lowered as compared with the configuration in which the sheet press portion 18 is continuously disposed, and the outer edge 11E of the first surface sheet 11 is likely to follow the movement of the fitting foot. Therefore, the 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 prevented from falling off.

In the joint region RX, a follower region RA may be provided. Next, the region RA has an adhesive for adhering the first surface sheet 11 and the second surface sheet 12. The sheet press portion 18 of 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 surface sheet 11 and the second surface sheet 12 are joined by an adhesive, heat or pressure is hard to be applied to the first surface sheet 11 at the time of bonding. Therefore, it is possible to suppress the breakage of the non-heat-fusible fiber caused by the heat at the time of joining, and to suppress the fall of the fibers of the first surface sheet 11. Further, the non-heat-fusible fiber is difficult to be melted by press working, and the joint strength may be low. With the adhesive, it becomes easy to obtain the desired joint strength.

In the joint region RX, both the succeeding region RA and the sheet press portion 18 can be provided. The bonding strength between the first surface sheet 11 and the second surface sheet can be ensured by the succeeding region RA, and the sheet surface press portion 18 can bond a certain range in the thickness direction of the first surface sheet 11 and the second surface sheet. It can also inhibit the shedding of non-heat-fused fibers. Further, in the joint region RX, the region RA and the sheet press portion 18 may be disposed at different distances. Specifically, the pitch in the width direction of the RA of the following region is shorter than the pitch in the width direction of the sheet press portion 18, and may be one-half the pitch in the width direction of the sheet press portion 18. According to such a configuration, a region in which the strength of the two sides overlapping is strong and a region in which only one of the bonding strengths is low is provided. In the region where the strength is low, the bonding state of the non-heat-fused fibers can be maintained in the region where the strength is high, while ensuring the flexibility of the surface sheet.

Further, the first surface sheet contains heat-fusible fibers together with the non-heat-fused fibers. Since the first surface sheet contains the heat-fusible fiber, the fusion portion is formed between the fibers by the fusion of the heat-fused fibers, and the non-heat-fusible fibers are less likely to fall off. Therefore, the detachment of the heat-fusible fiber can be prevented.

The second surface sheet 12 may contain heat-fusible fibers. Since the second surface sheet 12 contains the heat-fusible fiber, the fusion portion is formed between the fibers by the fusion of the heat-fusible fibers, and the non-heat-fused fibers of the first surface sheet 11 are stuck with the fusion portion. It will become difficult to fall off. Therefore, it is possible to prevent the non-heat-melting fibers from falling off.

As shown in Fig. 2, it can be provided that the outer edge 12E of the second surface sheet 12 and the side sheet 13 are not joined to the side non-joining region RZ. The outer edge 12E of the second top sheet 12 is located outside the first surface sheet 11 in the width direction, and is erected with respect to the side sheet 13 in the side non-joining region RZ. Therefore, when the wearer's foot is caught, the outer edge 12E of the second topsheet 12 is more likely to abut the foot than the outer edge 11E of the first topsheet 11. Further, it is possible to prevent the non-heat-sealing fibers from falling off due to the friction between the outer edge 11E of the first surface sheet 11 and the foot.

On the outer edge 12E of the second surface sheet 12, a crease FL extending in the front-rear direction L of the second surface sheet 12 can be formed. Since the second top sheet 12 is folded, it is easily deformed by the crease FL as a base point when it comes into contact with the wearer's foot. For example, in a configuration in which the folded second surface sheets are not joined to each other, the folded second surface sheet is deformed so as to be separated in the thickness direction, and is deformed toward the inner side in the width direction. By the deformation of the second surface sheet 12, the contact feeling with respect to the first surface sheet 11 can be alleviated, and the fall of the non-heat-fusible fibers of the first surface sheet 11 can be suppressed.

The outer edge 11E of the first surface sheet 11 may be located closer to the inner side in the width direction W than the outer edge 20E of the absorption chip 20. When sandwiched by the wearer's foot, the outer edge 20E of the absorbent chip 20 is more likely to abut against the foot first than the outer edge 11E of the first surface sheet 11. Further, it is possible to prevent the non-heat-sealing fibers from falling off due to the friction between the outer edge 11E of the first surface sheet 11 and the foot.

(3) Configuration of the 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 . The same contents as those of the first embodiment described above will be omitted.

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

As shown in Fig. 6, the first surface sheet 11 may be formed to have convex ridges formed on the skin facing surface side. By the formation of the pleat portion, the elongation in the width direction of the first surface sheet having a low elongation due to the amount of convex shape can be increased, so that the crack of the first surface sheet can be reduced.

The press portion 60 can be formed on the first surface sheet 11 and the second surface sheet 12. The press portion 60 compresses at least the first surface sheet 11 and the second surface sheet 12 in the thickness direction. The press portion 60 may compress the first surface sheet 11, the second surface sheet 12, and the absorption chip 20 in the thickness direction. The press portion 60 of the present embodiment compresses the first surface sheet 11, the second surface sheet 12, and the absorption chip 20 in the thickness direction. Further, the absorbent article 1 may be different from the press portion 60, and further includes a sheet press portion 18 that presses the first top sheet 11 and the second surface sheet 12.

Next, a configuration for suppressing cracking of the surface sheet of the absorbent article 1 thus constituted will be described. The absorbent article 1 is configured to suppress cracking of a surface sheet having a non-heat-fusible fiber (the first surface sheet 11 in the embodiment of the present embodiment).

The first surface sheet 11 and the second surface sheet 12 are compressed in the thickness direction when the press portion 60 is formed, and a force that is stretched in the planar direction acts. In this case, the first surface sheet 11 is joined to the second surface sheet 12 as a whole, and the first surface sheet 11 has no degree of freedom in the planar direction, so that it is likely to be pulled in the plane direction. And caused the crack. The free end portion 15 of the first surface sheet 11 is easy to move with respect to the plane direction, and can be moved toward the press portion 60 side when compressed in the thickness direction when the press portion 60 is formed. Therefore, when the press portion 60 is formed, the force applied to the stretching direction of the first surface sheet 11 can be reduced, and the crack of the first surface sheet 11 having the non-heat-sealing fibers such as cotton fibers can be suppressed.

In particular, as in the present embodiment, the first surface sheet 11, the second surface sheet 12, and the press portion 60 in which the absorption chip 20 is compressed are provided, and only the first surface sheet 11 and the second surface sheet 12 are provided. The compressed composition is comparatively strong, and the degree of compression is strong, and the first surface sheet 11 is more easily broken. Therefore, it is preferable to suppress the crack of the first surface sheet 11 by the free end portion 15.

Next, the free end portion 15 will be described in detail. Fig. 8 is a view showing a contact region RA of the first top sheet 11 and the second surface sheet 12, and a sheet press portion 18. Actually, the succeeding region RA and the sheet press portion 18 are overlapped in the thickness direction, but the convenience of the description is shown in a state in which the front-rear direction is adjacent. Next, the region RA is a region where the adhesive of the first surface sheet 11 and the second surface sheet 12 is applied. Next, the area RA may extend in the front-rear direction L, and a plurality of places may be arranged at intervals in the width direction. Then, the length of the region RA in the width direction may be longer than the interval of the region RA in the width direction. In other forms, the area RA may be extended in the width direction W, and a plurality of places may be arranged at intervals in the front-rear direction L.

The sheet press portion 18 is extendable in the front-rear direction L, and is provided at a plurality of intervals in the width direction. The length of the sheet press portion 18 in the width direction may be shorter than the interval between the sheet press portions 18 in the width direction. In other forms, the area RA may be extended in the width direction W, and a plurality of places may be arranged at intervals in the front-rear direction L.

It is possible to provide a region in which the sheet press portion 18 and the succeeding region RA overlap in the thickness direction and a region which does not overlap in the thickness direction. The sheet press portion 18 and the region where the succeeding region RA does not overlap in the thickness direction constitute a non-joining region RY. The region where the sheet press portion 18 and the succeeding region RA overlap in the thickness direction is a region in which only the sheet press portion 18 is provided, and a region in which only the succeeding region RA is provided, and the joint region RX is formed.

The region RA may then be located closer to the inner side than the outer edge of the first surface sheet 11. In other words, the succeeding region RA may be located closer to the inner side in the width direction than the outer edge 11E of the first surface sheet 11 in the width direction, and may be located closer to the outer edge 11F than the front end direction L of the first surface sheet 11 The inside of the direction. Further, the outermost region RA in the width direction may be closer to the outer side in the width direction than the outermost sheet press portion 18 located in the width direction. In such a configuration, the free end portion 15 is a region between the outer edge 11E of the first surface sheet 11 and the outermost region RA located in the width direction. Further, the outermost contact region RA located in the front-rear direction may be located closer to the outer side in the width direction than the outermost sheet press portion 18 located in the front-rear direction. With such a configuration, the free end portion 15 is a region between the outer end edge 11F of the first surface sheet 11 and the outermost edge region RA located in the front-rear direction.

The free end portion 15 may include the outer edge 11E in the width direction of the first surface sheet 11 and extend in the front-rear direction L. Generally, the absorbent article 1 has a length in the front-rear direction L that is longer than the length in the width direction W. Therefore, by providing the free end portion 15 at the outer edge 11E of the first surface sheet 11, the area of the free end portion 15 can be easily secured, and the crack of the first surface sheet 11 can be suppressed.

The free end portion 15 is overlapped with the absorption chip 20 in the thickness direction T. Since the pressurizing chip 60 is formed in the absorbing chip 20, since the free end portion 15 is superposed on the absorbing chip 20, the press portion 60 and the free end portion 15 are easily arranged in the vicinity. By disposing the free end portion 15 for relieving the force in the stretching direction in the vicinity of the press portion 60, it is possible to suppress the first surface sheet 11 from being cracked.

Next, the area RA can be set at a plurality of intervals. In the succeeding region RA, the first surface sheet 11 and the second surface sheet 12 are joined, and the first surface sheet 11 and the second surface sheet 12 are not joined in the region between the subsequent regions RA. Therefore, when a tensile force is applied, there are a portion that is easy to move (a region between the regions), and a portion that is difficult to move (the following region). When a tensile force is applied, a portion that is easy to move is moved with a portion that is difficult to move as a base point. By providing a plurality of portions in the region, the force in the stretching direction can be relaxed in a wider range of the first surface sheet, and the cracking of the first surface sheet 11 can be suppressed.

The press portion 60 may be located closer to the inner side than the outer edge of the first surface sheet 11. In other words, the press portion 60 may be located closer to the inner side in the width direction than the outer edge of the first surface sheet 11 in the width direction, and may be located closer to the front-rear direction than the outer end edge of the first front sheet 11 in the front-rear direction L. Inside. The press portion 60 may include a first press portion 61 and a second press portion 62.

The first press portion 61 can be disposed at the free end portion 15. When the first press portion 61 is formed at the free end portion, the region where the first surface sheet 11 and the second surface sheet 12 are not joined is compressed to form the first press portion 61. Since the first surface sheet 11 and the second surface sheet 12 are not joined at least around the first press portion 61, the force acting in the stretching direction of the first surface sheet 11 can be alleviated. Therefore, cracking of the first surface sheet can be suppressed more. Further, the second press portion 62 may be provided in the joint region RX where the first surface sheet and the second surface sheet are joined to each other.

The first press portion 61 can span the free end portion 15 and a region closer to the outer side than the first surface sheet 11. At least the side sheet 13 may be disposed closer to the outer side than the first surface sheet 11. In comparison with the configuration in which the entire first press portion 61 is formed on the first surface sheet, the force acting on the stretching direction of the first surface sheet can be alleviated at the time of forming the first press portion 61. Therefore, cracking of the first surface sheet can be suppressed more.

The press portion 60 is recessed from the first surface sheet 11 side toward the second surface sheet 12 side. The force compressed by the press portion 60 is applied from the first surface sheet 11 side toward the second surface sheet 12 side. Since the free end portion 15 is provided on the sheet on the side where the force is applied (the side facing the skin surface), the force in the stretching direction is more moderated, and the crack of the first surface sheet 11 can be suppressed.

The press section 60 can be disposed in a pair at intervals in a plan view. The interval between the pair of press portions 60 may not be constant. In other words, as shown in Fig. 5, the first region R11 in which the pair of press portions 60 are spaced apart from each other and the second region R12 in which the interval between the pair of press portions 60 is wider than the first region R11 may be provided. . In the portion where the press portions 60 are spaced apart from each other, since the length of the first surface sheet located in the portion is long, the force in the stretching direction at the time of forming the press portion 60 is weak. On the other hand, in the portion where the press portions 60 are spaced apart from each other, since the length of the first surface sheet 11 located in the portion is short, the force in the stretching direction at the time of forming the press portion 60 is strong. Since the portion where the tensile force is strong is mixed with the weaker portion, the force application is not concentrated, and the first surface sheet is prevented from being cracked, as compared with the field applied by the force.

The elongation of the second surface sheet 12 can be made higher than the elongation of the first surface sheet 11. Since the second surface sheet 12 has a higher elongation than the first surface sheet 11, the first surface sheet 11 can be used to suppress the surface of the first surface sheet 11 by using a sheet having a relatively low elongation. The decrease in the elongation of the entire sheet can reduce the crack of the first surface sheet.

Further, the elongation can be measured using a tensile tester (automatic chart manufactured by Shimadzu Corporation). Specifically, the test piece having a size of 25 mm × 40 mm was cut out from the first surface sheet and the second surface sheet, and the joint portion was kept at a low temperature without being stretched. After the measurement terminals of the tensile tester were set to 20 mm, the measurement was performed under the set conditions of the tensile speed of 100 mm/min, and the value of the elongation at break was determined. The measurement was performed three times, and the average value was taken as the elongation of each sheet.

As described above, the present invention has been described in detail using the embodiments described above, and the present invention is not limited to the embodiments described in the specification. The present invention can be modified and modified without departing from the spirit and scope of the invention as defined by the appended claims. Therefore, the description of the specification is intended to be illustrative, and is not intended to limit the invention.

[Industrial availability]

It is possible to provide an absorbent article which can suppress the deterioration of the wearer's skin while suppressing the shedding of the non-heat-fused fibers.

1‧‧‧Absorbables

11‧‧‧First surface sheet (surface sheet)

11E‧‧‧ outer edge

12‧‧‧Second surface sheet (surface sheet)

12E‧‧‧ outer edge

13‧‧‧Side sheet (surface sheet)

18‧‧‧Squeeze Department

20‧‧‧absorbing chip

20E‧‧‧ outer edge

R1‧‧‧ front side domain

R2‧‧‧ rear side domain

R3‧‧‧Central Domain

RA‧‧‧Next area

RX‧‧‧ joint area

RY‧‧‧non-joined area

RZ‧‧‧Side non-joined area

Fig. 1 is a plan view of the absorbent article according to the first embodiment as seen from the skin facing side.

Fig. 2 is a cross-sectional view taken along line A-A shown in Fig. 1.

Fig. 3 is an enlarged view of a portion B shown in Fig. 2.

Fig. 4 is a plan view showing the adhesive region and the sheet press portion of the absorbent article according to the first embodiment.

Fig. 5 is a plan view of the absorbent article according to the second embodiment as seen from the skin facing side.

Fig. 6 is a cross-sectional view taken along line A-A shown in Fig. 5.

Fig. 7 is an enlarged view of a portion B shown in Fig. 6.

Fig. 8 is a plan view showing the adhesion region and the sheet press portion of the absorbent article according to the second embodiment.

Claims (20)

An absorbent article having: Front and rear direction, and a width direction orthogonal to the front-rear direction, and Surface sheet, and An absorption chip disposed on the non-skin facing side of the surface sheet; The surface sheet includes a first surface sheet containing non-thermally-fused fibers and a second surface sheet located on the non-skin opposing surface side of the first surface sheet, and is characterized by: The outer edge of the first surface sheet in the width direction is disposed on the skin facing surface side of the second surface sheet; a joint region in which the first surface sheet and the second surface sheet are joined; The outer edge of the first surface sheet is provided with a free end portion that is not joined to the second surface sheet. The absorbent article of claim 1, wherein The distance between the joint region and the outer edge of the first surface sheet in the width direction is shorter than the fiber length of the non-heat-fusible fiber. An absorbent article according to claim 1 or 2, wherein A press portion for compressing the first surface sheet and the second surface sheet is provided in the joint region. An absorbent article according to claim 3, wherein The press portion is disposed at intervals in the front-rear direction or the width direction. An absorbent article according to claim 1 or 2, wherein An adhesive for adhering the first surface sheet and the second surface sheet to the bonding region is provided. An absorbent article according to claim 1 or 2, wherein The first surface sheet contains heat-fusible fibers. An absorbent article according to claim 1 or 2, wherein The second surface sheet contains heat-fusible fibers. An absorbent article according to claim 1 or 2, wherein a side sheet covering the outer edge of the absorbent article is disposed on a non-skin facing surface side of the second surface sheet; The outer edge of the second surface sheet is located outside the outer edge of the first surface sheet in the width direction, and And a side non-joining region in which the outer edge of the second surface sheet and the side sheet are not joined. The absorbent article of claim 8, wherein The second surface sheet is folded with the crease along the front-rear direction as a base point; The pleats are provided on the outer edge of the second surface sheet. An absorbent article according to claim 1 or 2, wherein The outer edge of the first surface sheet is located on the inner side closer to the width direction than the outer edge of the absorption chip. The absorbent article of claim 1, wherein At least a press portion for compressing the first surface sheet and the second surface sheet in the thickness direction is provided; At least a part of the joint region is a region in which the press portion is provided. The absorbent article of claim 11, wherein In the press portion, the first surface sheet, the second surface sheet, and the absorption chip are compressed. The absorbent article of claim 12, wherein The free end portion is overlapped with the absorption chip in the thickness direction. The absorbent article according to any one of claims 11 to 13, wherein 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 absorbent article according to any one of claims 11 to 13, wherein The press portion is recessed from the first surface sheet side toward the second surface sheet side. The absorbent article according to any one of claims 11 to 13, wherein The elongation of the second surface sheet is higher than the elongation of the first surface sheet. The absorbent article according to any one of claims 11 to 13, wherein a bonding region having an adhesive subsequent to the first surface sheet and the second surface sheet is disposed on the inner side than the free end portion; The above-mentioned succeeding regions are plural places at intervals. The absorbent article according to any one of claims 11 to 13, wherein The press section has a first press section disposed at the free end. An absorbent article according to claim 18, wherein The first press portion is spanned over the free end portion and a region outside the first surface sheet. The absorbent article according to any one of claims 11 to 13, wherein The press portions are arranged in a pair at intervals; The interval between the pair of press sections is not constant.