阅读说明：本技术 吸收性物品 (Absorbent article ) 是由 七海久孝 野本贵志 于 2018-12-18 设计创作，主要内容包括：吸收性物品(1)具有：互为正交的长度方向(L)、宽度方向(W)及厚度方向(T)；吸收体(1)；以及表面片(20),其配置于比吸收体靠肌肤面侧的位置。表面片具有相比于吸收体的外缘向外侧延伸的延伸部(22)。延伸部具有扩散抑制部(25)。表面片为纺织物或者编织物。(The absorbent article (1) has a longitudinal direction (L), a width direction (W), and a thickness direction (T) that are orthogonal to each other, an absorbent body (1), and a top sheet (20) that is disposed at a position closer to the skin surface side than the absorbent body, the top sheet having an extension (22) that extends outward than the outer edge of the absorbent body, the extension having a diffusion-suppressing part (25), the top sheet being a woven fabric or a knitted fabric.)

1. An absorbent article having:

a length direction, a width direction and a thickness direction which are orthogonal to each other;

an absorbent body; and

a top sheet disposed on the skin surface side of the absorber, wherein,

the surface sheet has an extension extending outward than the outer edge of the absorbent body,

the extension portion is provided with a diffusion suppressing portion,

the surface sheet is a woven or knitted fabric.

2. The absorbent article of claim 1,

the extension portion has a diffusion suppression region having a plurality of diffusion suppression portions arranged at intervals,

the interval is 3mm or less.

3. The absorbent article of claim 2, wherein,

the plurality of diffusion suppressing parts include a plurality of 1 st diffusion suppressing parts arranged at intervals in an arrangement direction and a2 nd diffusion suppressing part arranged at a position shifted in a direction orthogonal to the arrangement direction,

the 2 nd diffusion suppressing portion is disposed between the plurality of 1 st diffusion suppressing portions when viewed along the orthogonal direction.

4. The absorbent article according to claim 3,

the distance between the 1 st diffusion suppression section and the 2 nd diffusion suppression section in the orthogonal direction is 3mm or less.

5. The absorbent article according to any one of claims 2 to 4, wherein,

the diffusion suppressing region extends continuously in the width direction.

6. The absorbent article according to any one of claims 2 to 4, wherein,

the diffusion suppressing region extends continuously along an outer edge of the surface sheet when viewed in a plane in the thickness direction.

7. The absorbent article according to any one of claims 1 to 6, wherein,

the diffusion-suppressing part is constituted by at least a compressed part obtained by compressing the surface sheet in the thickness direction.

8. The absorbent article according to any one of claims 1 to 7, wherein,

the diffusion suppressing portion is formed of at least an opening portion penetrating the top sheet in the thickness direction.

9. The absorbent article according to any one of claims 1 to 8, wherein,

the yarns constituting the woven fabric or the knitted fabric are constituted of non-fusible fibers.

10. The absorbent article according to any one of claims 1 to 9, wherein,

the surface sheet is the woven fabric or the knitted fabric having elasticity.

11. The absorbent article according to any one of claims 1 to 10, wherein,

the absorbent article has a back sheet that is a liquid-impermeable film in contact with the extension,

the diffusion-suppressing part is constituted by at least a compressed part obtained by compressing the front surface sheet and the back surface sheet in the thickness direction,

at the compressed portion, a portion of the back sheet enters between fibers of yarns constituting the woven fabric or the knitted fabric.

12. The absorbent article according to any one of claims 1 to 11, wherein,

the absorbent article has a back sheet that is a liquid-impermeable film in contact with the extension,

the diffusion suppressing part is formed of at least an opening part penetrating the surface sheet in the thickness direction,

a part of the back sheet enters the opening.

Technical Field

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

Background

Patent document 1 discloses an absorbent article including an absorbent body and a topsheet made of nonwoven fabric and disposed on the skin surface side of the absorbent body. Since the nonwoven fabric has liquid permeability, the body fluid of the wearer passes through the topsheet and is absorbed by the absorbent body.

Disclosure of Invention

The seal portion is formed by thermally welding the extension portion of the front sheet and the extension portion of the back sheet extending outward beyond the outer edge of the absorbent body by embossing so as not to expose the absorbent body to the outside. The seal portion is compressed in the thickness direction by the embossing, and therefore has a density higher than that of the periphery of the seal portion. Therefore, the body fluid diffuses from a low-density portion to a high-density portion due to the capillary phenomenon. The extended portion of the top sheet does not overlap the absorbent body, and therefore, the body fluid is less likely to be absorbed by the absorbent body at this extended portion. Therefore, the body fluid diffused in the extension portion of the topsheet is likely to contact the skin, and may cause discomfort to the wearer.

Therefore, an absorbent article capable of suppressing diffusion of body fluid in an extension portion of the top sheet extending outward from the outer edge of the absorbent body is desired.

An absorbent article according to one aspect includes: a length direction, a width direction and a thickness direction which are orthogonal to each other; an absorbent body; and a top sheet disposed on the skin surface side of the absorbent body, wherein the top sheet has an extension portion extending outward from the outer edge of the absorbent body, the extension portion has a diffusion-suppressing portion, and the top sheet is a woven fabric or a knitted fabric.

Drawings

Fig. 1 is a plan view of the absorbent article of the embodiment viewed from the skin surface side.

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

Fig. 3 is a schematic view (cross-sectional view) for explaining a diffusion-suppressing part of embodiment 1.

Fig. 4 is a schematic view (plan view) for explaining the diffusion-suppressing part of embodiment 1.

Fig. 5 is a schematic view (cross-sectional view) for explaining a diffusion-suppressing part of embodiment 2.

Detailed Description

(1) Brief description of the embodiments

At least the following matters will be apparent from the description of the present specification and the accompanying drawings.

An absorbent article according to one aspect includes: a length direction, a width direction and a thickness direction which are orthogonal to each other; an absorbent body; and a top sheet disposed on the skin surface side of the absorbent body, wherein the top sheet has an extension portion extending outward from the outer edge of the absorbent body, the extension portion has a diffusion-suppressing portion, and the top sheet is a woven fabric or a knitted fabric.

When the extended portion of the surface sheet is processed to form the diffusion-suppressing portion, a force is applied to a processing portion (diffusion-suppressing portion) of the extended portion. This increases the density of the processed portion and the periphery thereof.

In the absorbent article of the present application, the surface sheet is a woven fabric or a knitted fabric, and therefore the surface sheet is composed of yarns. The yarns in the processed region and the periphery thereof are continuously connected to the yarns in the unprocessed portion (for example, the portion disposed on the skin surface side of the absorbent body) of the other surface sheet.

Therefore, even if the yarn at the processing portion and the periphery thereof is temporarily pulled toward the processing portion by the force of the processing of the extending portion, the yarn at the processing portion and the periphery thereof is pulled back by the unprocessed portion. Therefore, even if the fibers constituting the yarn are concentrated at the processing portion and the periphery thereof, the concentration of the fibers is alleviated after the processing. On the other hand, in the case where the surface sheet is a nonwoven fabric, the fibers constituting the nonwoven fabric are not aligned in a uniform direction, and therefore, the fibers in the processed region and the periphery thereof are not necessarily continuous with the fibers in the unprocessed portion. Further, since the fibers at the processed portion and the periphery thereof are strongly entangled with each other by the force applied by the processing, the fibers at the processed portion and the periphery thereof are hardly pulled back by the unprocessed portion. Therefore, the fiber concentration state is maintained even after the processing at the processing site and the periphery thereof.

As described above, in the absorbent article of the present application, since the concentration of the fibers at the processed portion (diffusion-suppressing portion) and the periphery thereof is relaxed after the processing, the density of the diffusion-suppressing portion and the periphery thereof is lower than that of the surface sheet of the nonwoven fabric. Therefore, the difference between the density of the diffusion-suppressing part and the periphery thereof and the density of the unprocessed portion is reduced, and thus diffusion of the body fluid from a portion having a low density to a portion having a high density (diffusion of the body fluid due to the difference in density) due to the capillary phenomenon can be suppressed.

According to a preferred embodiment, the extension portion may have a diffusion suppression area in which a plurality of diffusion suppression portions are arranged at intervals. The interval may be 3mm or less.

Since the diffusion-suppressing parts are arranged at a close interval in the diffusion-suppressing region, the diffusion of the body fluid in the diffusion-suppressing region is suppressed by at least one of the plurality of diffusion-suppressing parts, and the body fluid can be suppressed from diffusing over a wide range.

According to a preferred embodiment, the plurality of diffusion reducing portions may include a plurality of 1 st diffusion reducing portions arranged at intervals in the arrangement direction and a plurality of 2 nd diffusion reducing portions arranged at positions shifted in a direction orthogonal to the arrangement direction. The 2 nd diffusion suppressing unit may be disposed between the 1 st diffusion suppressing units when viewed along the orthogonal direction.

Since the 2 nd diffusion suppressing portion is located in a diffusion direction (i.e., orthogonal direction) in which the body fluid diffuses through between the 1 st diffusion suppressing portions, diffusion of the body fluid is suppressed.

According to a preferred embodiment, the distance between the plurality of 1 st diffusion suppressing parts and the 2 nd diffusion suppressing part in the orthogonal direction may be 3mm or less.

Since the distance between the 1 st diffusion suppressing portion and the 2 nd diffusion suppressing portion is short, diffusion of body fluid passing through between the 1 st diffusion suppressing portions can be further suppressed.

According to a preferred embodiment, the diffusion-suppressing region may extend continuously in the width direction.

Since the diffusion-suppressing region extends continuously in the width direction, the possibility that the body fluid diffused in the longitudinal direction is blocked by the diffusion-suppressing member can be increased.

According to a preferred embodiment, the diffusion-suppressing region may extend continuously along an outer edge of the top sheet when viewed in plan view in the thickness direction.

The diffusion of body fluid to the outer edge of the surface sheet can be suppressed.

According to a preferred embodiment, the diffusion-suppressing member may be formed of at least a compressed portion obtained by compressing the surface sheet in the thickness direction.

Even if the yarns in the compressed part and the periphery thereof are temporarily pulled toward the processing site by the force of the processing of the extended part for forming the compressed part, the yarns in the compressed part and the periphery thereof are pulled back by the unprocessed portion. Therefore, even if the fibers constituting the yarn are concentrated at the compressed part and the periphery thereof during processing, the concentration of the fibers is alleviated after the processing. Thus, the density of the compressed part and the periphery thereof is lower than that of the surface sheet of the nonwoven fabric, so that the difference between the density of the compressed part and the periphery thereof and the density of the unprocessed part is small, and diffusion of body fluid due to the difference in density can be suppressed.

According to a preferred embodiment, the diffusion preventing section may be formed of at least an opening penetrating the top sheet in the thickness direction.

Even if the yarn around the opening is temporarily pulled toward the processing portion by the force of processing the extending portion to form the opening, the yarn around the opening is pulled back by the unprocessed portion. Therefore, even if the fibers constituting the yarn are concentrated at the periphery of the opening portion during processing, the concentration of the fibers is alleviated after the processing. Thus, the density of the periphery of the opening is lower than that of the surface sheet of the nonwoven fabric, and therefore, the difference between the density of the periphery of the opening and the density of the unprocessed portion is small, and diffusion of body fluid due to the difference in density can be suppressed.

According to a preferred embodiment, the yarns forming the woven fabric or the knitted fabric may be made of non-fusible fibers.

Since the yarn is a non-welded fiber, even if heat treatment is performed during the production of the absorbent article, the occurrence of a welded portion having a high density in the topsheet can be suppressed. As a result, diffusion of body fluid due to the difference in density can be suppressed.

According to a preferred embodiment, the surface sheet may be the woven fabric or the knitted fabric having stretchability.

In the case where the diffusion-suppressing part is formed of a compressed part, the force with which the yarn in the compressed part and the periphery thereof is pulled back by the unprocessed portion is further increased by the expansion and contraction of the surface sheet which is a woven fabric or a knitted fabric, and therefore, the concentration of the fibers constituting the yarn can be further alleviated in the compressed part and the periphery thereof. As a result, the difference between the density of the compressed portion and the periphery thereof and the density of the unprocessed portion can be further reduced, and thus the diffusion of the body fluid due to the difference in density can be further suppressed. In the case where the diffusion-suppressing part is formed of an opening, the force with which the yarn around the opening is pulled back by the unprocessed portion is further increased by the expansion and contraction of the surface sheet, and thus the opening is enlarged. As a result, contact of the fibers constituting the yarn can be further suppressed, and thus diffusion of body fluid along the fibers can be suppressed.

According to a preferred embodiment, the absorbent article may have a back sheet having a film that is in contact with the extension and is liquid-impermeable. The diffusion-suppressing member may be formed of at least a compressed portion obtained by compressing the front sheet and the back sheet in the thickness direction. In the compressed portion, a part of the back sheet may enter between fibers of yarns constituting the woven fabric or the knitted fabric.

Since a part of the back sheet as the liquid-impermeable sheet enters between the fibers constituting the yarn of the compressed part, the diffusion of the body fluid is blocked by a part of the back sheet entering between the fibers, and the diffusion of the body fluid is suppressed.

According to a preferred embodiment, the absorbent article may have a back sheet that is in contact with the extension and is a liquid-impermeable film. The diffusion-suppressing part may be formed of at least an opening penetrating the top sheet in the thickness direction. A part of the back sheet may enter the opening.

Since a part of the back sheet as the liquid impermeable film enters the opening, the diffusion of the body fluid is blocked by the part of the back sheet entering the opening, thereby suppressing the diffusion of the body fluid.

(2) Schematic structure of absorbent article

Hereinafter, the same or similar parts will be denoted by the same or similar reference numerals in the following description of the drawings. Note that the drawings are schematic, and the scale of each dimension and the like are different from those in the actual case. Therefore, specific dimensions and the like should be determined with reference to the following description. In addition, the drawings may include portions having different dimensional relationships and ratios.

Fig. 1 is a plan view of the absorbent article of the embodiment viewed from the skin surface side. Fig. 2 is a sectional view taken along line a-a shown in fig. 1.

The absorbent article 1 has a longitudinal direction L, a width direction W, and a thickness direction t that are orthogonal to each other, "skin surface side" corresponds to a side that faces the skin of the wearer during use, "non-skin surface side" corresponds to a side that faces the skin of the wearer during use.

The absorbent article 1 has a crotch region S1, a front region S2, and a back region S3. The crotch region S1 is a region opposite to the excretory opening of the wearer, for example, the vaginal opening. When the absorbent article 1 is worn in underwear, the crotch region S1 is a region disposed in the crotch portion of the underwear and between the legs of the wearer.

The front region S2 is located more anteriorly than the crotch region S1. The rear region S3 is located rearward of the crotch region S1.

The absorbent article 1 has an absorbent body 10, a front sheet 20, a back sheet 30, and a side sheet 40.

The absorbent body 10 is a member containing an absorbent material. The absorbent body 10 is not particularly limited, but may include a hydrophilic fiber layer such as pulp and a Super Absorbent Polymer (SAP), or a combination thereof.

The topsheet 20 is disposed on the skin surface side of the absorbent body 10. The surface sheet 20 is a woven or knitted fabric. The surface sheet 20 may be a woven fabric or a knitted fabric having elasticity.

Woven and knitted fabrics are made from yarns made by bundling and twisting a plurality of fibers. The textile fabric is constructed by weaving yarns. For example, the surface sheet 20 may be a woven fabric obtained by weaving with any one of a plain weave, a twill weave, and a satin weave (japanese pearl coated article). The knitted fabric is formed by knitting yarns. For example, the top sheet 20 may be a knitted fabric knitted from any one of plain, tricot, circular rib (japanese: フライス), bead (japanese: deer's bone), honeycomb, double knit (japanese: ダンボールニット), and loop (japanese: fur). The arrangement of the fibers making up the woven and knit fabrics is aligned along the length of the yarn. The yarns that make up the woven or knitted fabric may also be comprised of non-fusible fibers. Non-fusible fibres are, for example, cotton, rayon, cellulose, silk, etc.

The nonwoven fabric is a three-dimensional fiber aggregate formed by bonding or mechanically winding each of the independently dispersed fibers with an adhesive or heat. The arrangement of the fibers constituting the nonwoven fabric is random.

The top sheet 20 has an extension 22 extending outward from the outer edge of the absorbent body 10. The extension portion 22 has a diffusion suppressing portion 25. The diffusion-suppressing part 25 may be formed by, for example, processing in which a force is applied in the thickness direction T. The diffusion-suppressing part 25 may have a smaller length in the thickness direction T than an unprocessed portion where the extension part 22 is not processed, for example. Therefore, the length of the diffusion-suppressing part 25 of the top sheet 20 (the extending part 22) in the thickness direction T is smaller than the length of the unprocessed part of the top sheet 20 in the thickness direction T. The diffusion suppressing unit 25 will be described in detail later. The extension portion 22 may have a diffusion suppression region R in which a plurality of diffusion suppression portions 25 are arranged at intervals.

The back sheet 30 is disposed on the non-skin surface side of the absorbent body 10. The back sheet 30 is a liquid impermeable film. The back sheet 30 is in contact with the extension 22. Specifically, the portion of the back sheet 30 extending outward of the outer edge of the absorbent body 10 is in contact with the extending portion 22.

The side sheet 40 is disposed on the outer side in the width direction W. The side sheet 40 covers the outer edge (outer end in the width direction W) of the surface sheet 20. In order to prevent menstrual blood from flowing beyond the side sheet 40 to the outside of the absorbent article 1, the side sheet 40 is preferably hydrophobic or water-repellent.

(3) Diffusion suppressing part 25

Fig. 3 is a schematic diagram (cross-sectional view) for explaining the diffusion-suppressing member 25, specifically, the diffusion-suppressing member 25 is a cross-sectional view in the longitudinal direction L and the thickness direction T, and fig. 4 is a schematic diagram (top view) for explaining the diffusion-suppressing member 25, and is a top view of the diffusion-suppressing member 25 as viewed from the skin surface side (thickness direction T).

As shown in fig. 3, in the present embodiment, the diffusion-suppressing member 25 is constituted by a compressed portion 25A obtained by compressing the top sheet 20 in the thickness direction T. The compressed portion 25A may be formed by compressing the surface sheet 20 in the thickness direction T by embossing using a circular pin, for example. The compressed portion 25A (diffusion-suppressing portion 25) may be circular in a plan view from the skin surface side.

Since the surface sheet 20, which is a woven fabric or a knitted fabric, is made of yarns, the yarns of the compressed part 25A and the peripheral part 251 thereof are continuously connected to the yarns of the unprocessed portion 252 of the other surface sheet. Therefore, even if the yarns of the compressed portion 25A and the peripheral portion 251 are temporarily pulled toward the processing site by the force of the processing of the extension portion 22 to form the compressed portion 25A, the yarns of the compressed portion 25A and the peripheral portion 251 are pulled back by the unprocessed portion 252. Therefore, even if the fibers constituting the yarn are concentrated at the compression portion 25A and the peripheral portion 251 during processing, the concentration of the fibers is relaxed after processing. This reduces the density of the compressed portions 25A and the peripheral portions 251 compared to the surface sheet of nonwoven fabric. In particular, the density of the peripheral portion 251 is hardly changed from the density of the unprocessed portion 252. Since the difference between the density of the compressed portion 25A and the peripheral portion 251 and the density of the unprocessed portion 252 is small, the diffusion of the body fluid (diffusion in the direction of arrow M) due to the difference in density can be suppressed.

The density of the compressed portion 25A is higher than that of the unprocessed portion 252. Since the speed of diffusion from the compressed portion 25A having a high density to the unprocessed portion 252 having a low density (the speed of diffusion in the direction of arrow P) is slower than the speed of diffusion in the unprocessed portion 252 (the speed of diffusion in the direction of arrow Q), the extension portion 22 has the compressed portion 25A as the diffusion suppressing portion 25, and thus diffusion of the body fluid in the extension portion 22 can be suppressed.

As shown in fig. 1 and 4, the diffusion-suppressing regions R include a plurality of diffusion-suppressing parts 25 (1 st diffusion-suppressing part 25a1) arranged at intervals a 1. The interval a1 is 3mm or less. In the diffusion-suppressing region R, the diffusion-suppressing parts 25 are arranged at the close interval a1, and therefore, in the diffusion-suppressing region R, the diffusion of the body fluid is suppressed by at least any one of the diffusion-suppressing parts 25 among the plurality of diffusion-suppressing parts 25. As a result, the body fluid can be prevented from spreading over a wide range.

The plurality of diffusion reducing sections 25 include a plurality of 1 st diffusion reducing sections 25a1 arranged at intervals a1 in the array direction, and a plurality of 2 nd diffusion reducing sections 25a2 arranged at positions shifted in the orthogonal direction orthogonal to the array direction. The 2 nd diffusion suppressing parts 25a2 are disposed between the 1 st diffusion suppressing parts 25a1 when viewed in the orthogonal direction. Thereby, the 2 nd diffusion suppressing parts 25a2 are located in the diffusion direction (i.e., orthogonal direction) in which the body fluid diffuses through between the 1 st diffusion suppressing parts 25a1, and thus diffusion of the body fluid is suppressed.

The distance a2 in the orthogonal direction between the 1 st diffusion suppressing part 25a1 and the 2 nd diffusion suppressing part 25a2 may also be less than 3 mm. Thus, the distance a2 between the 1 st diffusion inhibitor 25a1 and the 2 nd diffusion inhibitor 25a2 is short, and thus diffusion of the body fluid through between the 1 st diffusion inhibitor 25a1 can be further inhibited.

The diffusion-suppressing regions R may extend continuously in the width direction W, and this can increase the possibility that the body fluid diffused in the longitudinal direction L is blocked by the diffusion-suppressing parts 25.

The diffusion-suppressing region R may extend continuously along the outer edge of the top sheet 20 in a plan view. The diffusion of body fluid to the outer edge of the surface sheet 20 can be suppressed.

The diffusion-suppressing member 25 may be formed of at least a compressed portion 25A obtained by compressing the front sheet 20 and the back sheet 30 in the thickness direction T. In this case, a part of the back sheet 30 may enter between fibers of yarns constituting the woven fabric or knitted fabric in the compressed portion 25A. For example, the back sheet 30 may be partially melted by embossing the top sheet 20 and the back sheet 30 together, so that a part of the back sheet 30 enters between fibers of the yarn of the top sheet 20. This blocks the diffusion of the body fluid from a part of the back sheet 30 that enters between the fibers, thereby suppressing the diffusion of the body fluid.

In addition, when the yarns constituting the top sheet 20 are non-welded fibers, the occurrence of welded portions with a high density in the top sheet 20 can be suppressed even if heat treatment is performed during the production of the absorbent article. As a result, diffusion of body fluid due to the difference in density can be suppressed.

In addition, in the case where the surface sheet 20 is a stretchable woven fabric or knitted fabric, the force of pulling back the yarns of the compressed portion 25A and the peripheral portion 251 from the unprocessed portion 252 is further increased by the stretching of the surface sheet 20 as the woven fabric or knitted fabric, and therefore, the concentration of the fibers constituting the yarns can be further alleviated in the compressed portion 25A and the peripheral portion 251. As a result, the difference between the density of the compressed portion 25A and the peripheral portion 251 and the density of the unprocessed portion 252 can be further reduced, and thus the diffusion of the body fluid due to the difference in density can be further suppressed.

(4) Embodiment 2

An absorbent article 1 according to embodiment 2 will be described. Fig. 5 is a schematic diagram for explaining the diffusion-suppressing parts 25 of the absorbent article 1 according to embodiment 2.

The diffusion-suppressing part 25 is constituted by at least an opening 25B penetrating the topsheet 20 in the thickness direction T. The opening 25B may be formed by compressing the surface sheet 20 in the thickness direction T by embossing, for example. The opening 25B may be formed by machining with a tool such as a cutter.

Since the surface sheet 20, which is a woven fabric or a knitted fabric, is made of yarn, the yarn of the peripheral portion 251, which is the periphery of the opening 25B, and the yarn of the unprocessed portion 252 of the other surface sheet are continuously connected. Therefore, even if the yarn of the peripheral portion 251 is temporarily pulled toward the processing portion by the force of the processing of the extending portion 22 to form the opening 25B, the yarn of the peripheral portion 251 is pulled back from the unprocessed portion 252. Therefore, in the peripheral portion 251, even if fibers constituting the yarn are concentrated during processing, the concentration of the fibers is alleviated after processing. The density of the peripheral portion 251 is hardly changed from that of the unprocessed portion 252. Thus, since the density of the peripheral portion 251 is lower than that of the surface sheet of the nonwoven fabric, the difference between the density of the peripheral portion 251 and the density of the unprocessed portion 252 is small, and diffusion of body fluid due to the difference in density can be suppressed.

Further, due to the processing of the extending portion 22 to form the opening portion 25B, the fibers of the yarn constituting the woven fabric or knitted fabric are cut. As a result, the diffusion of the body fluid (diffusion in the direction of arrow S) due to the diffusion of the body fluid along the fibers of the yarn can be suppressed. Therefore, the body fluid of the extension portion 22 can be suppressed from spreading.

A part of the back sheet 30 may enter the opening 25B. For example, when the opening 25B is formed in the front sheet 20 and the back sheet 30, a part of the back sheet 30 may be cut so that a part of the back sheet 30 enters the opening 25B. This can block the diffusion of the body fluid by a part of the back sheet 30 entering the opening 25B, thereby suppressing the diffusion of the body fluid.

In addition, in the case where the surface sheet 20 is a stretchable woven fabric or knitted fabric, the force of pulling back the yarn of the peripheral portion 251 from the unprocessed portion 252 is further increased by the stretching of the surface sheet 20, and thus the opening 25B is enlarged. As a result, contact of the fibers constituting the yarn can be further suppressed, and thus diffusion of body fluid along the fibers can be suppressed.

(5) Other embodiments

In the above embodiments, the compressing portion 25A and the opening portion 25B are circular in a plan view, but the present invention is not limited thereto, and for example, the compressing portion 25A and the opening portion 25B may have a slit shape extending in a predetermined direction in a plan view, and the predetermined direction may be, for example, the width direction w.

In each of the above embodiments, the interval a1 may be 0.5mm or more. The distance a2 may be 0.5mm or more. This ensures a region capable of absorbing body fluid in the region between the diffusion-suppressing parts 25, and thus can suppress leakage of body fluid.

The absorbent article of the present embodiment is described by taking a sanitary napkin as an example, but is not limited thereto. The invention may also be applied to other absorbent articles (e.g. panty liners, breast pads, incontinence pads for adults, faeces pads or sweat pads etc.). The present invention is particularly applicable to articles used with absorbent articles attached to the inside of wearing articles such as underwear of users.

While the present invention has been described in detail with reference to the above embodiments, it will be apparent to those skilled in the art that the present invention is not limited to the embodiments described in the present specification. The present invention can be implemented as modifications and variations without departing from the spirit and scope of the present invention defined by the claims. Therefore, the description of the present specification is for illustrative purposes, and does not have any limiting meaning to the present invention.

(6) Comparative evaluation

Specifically, first, in each of examples and comparative examples, a compressed part (embossed part) was formed by compressing a top sheet and a back sheet in the thickness direction T, menstrual blood was dropped from a boundary between the embossed part and the non-embossed part at a distance of L mm in the longitudinal direction, specifically, 1ml of menstrual blood was dropped within 5 seconds, left for 5 seconds, and such a cycle was repeated 4 times, and after 30 minutes, the length (diffusion length) of menstrual blood diffusing in the longitudinal direction was measured.

In examples 1 and 2, the surface sheet was woven in a plain weave with a weight per unit area of 100 gsm. In example 1, a plurality of openings and a compression portion were formed as the diffusion-suppressing portion. Example 2 has a compression portion as a diffusion-suppressing portion.