KR20200102997A - Absorbent article - Google Patents

Abstract

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 absorber 1, and a top sheet 20 disposed on the skin surface side than the absorber. . The top sheet has an extension portion 22 extending outward from the outer edge of the absorber. The extended portion has a diffusion suppressing portion 25. The surface sheet is a woven or knitted fabric.

Description

Absorbent article

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

Patent Literature 1 discloses an absorbent article comprising an absorber and a top sheet disposed on the skin surface side than the absorber and made of a nonwoven fabric. Since the nonwoven fabric has liquid permeability, the wearer's body fluid passes through the top sheet and is absorbed by the absorber.

Patent Document 1: Japanese Patent Laid-Open No. 2013-85831

A seal portion is formed by heat-sealing the extension portion of the top sheet and the extension portion of the back sheet extending outward from the outer periphery of the absorber by embossing so that the absorber does not come out to the outside. Since the seal portion is compressed in the thickness direction by embossing, the density is greater than that of the seal portion. For this reason, the body fluid diffuses from a low density place toward a high place by the capillary phenomenon. Since the extended portion of the top sheet does not overlap with the absorber, it is difficult for the body fluid to be absorbed by the absorber in the extended portion. Therefore, the bodily fluid diffused from the extended portion of the surface sheet is likely to come into contact with the skin, and the wearer may feel uncomfortable.

Accordingly, there is a need for an absorbent article capable of suppressing the diffusion of body fluids in the extended portion of the surface sheet extending outward from the outer edge of the absorber.

An absorbent article according to an aspect is an absorbent article having a longitudinal direction, a width direction, and a thickness direction orthogonal to each other, an absorber, and a top sheet disposed on the skin side of the absorber, wherein the top sheet comprises: an outer edge of the absorber It has an extension that extends more outward, the extension has a diffusion suppression, and the surface sheet is a woven or knitted fabric.

1 is a plan view of an absorbent article according to an embodiment viewed from the skin surface side.
2 is a cross-sectional view taken along line AA shown in FIG. 1.
3 is a schematic view (cross-sectional view) for explaining a diffusion suppressing unit according to the first embodiment.
4 is a schematic diagram (plan view) for explaining a diffusion suppressing unit according to the first embodiment.
5 is a schematic diagram (cross-sectional view) for explaining a diffusion suppressing unit according to a second embodiment.

(1) Summary of embodiment

At least the following matters become clear from description of this specification and the attached drawings.

An absorbent article according to an aspect is an absorbent article having a longitudinal direction, a width direction, and a thickness direction orthogonal to each other, an absorber, and a top sheet disposed on the skin side of the absorber, wherein the top sheet comprises: an outer edge of the absorber It has an extension that extends more outward, the extension has a diffusion suppression, and the surface sheet is a woven or knitted fabric.

When processing the extended portion of the surface sheet to form the diffusion inhibiting portion, a force is applied to the processing point (diffusion inhibiting portion) of the extended portion. As a result, the density of the processing location and its periphery increases.

In the absorbent article of the present application, since the top sheet is a woven or knitted fabric, the top sheet is composed of yarn. The yarns at the processed location and the periphery thereof and the unprocessed unprocessed portions of the other surface sheet (eg, portions disposed on the skin surface side of the absorbent body) are continuously connected.

For this reason, even if the machined location and the yarn around it are temporarily stretched to the machined location by the force at the time of machining the extension portion, the machined location and the yarn around it are pulled back from the unprocessed portion. Therefore, even if the fibers constituting the yarn are concentrated at the processing point and the periphery thereof, the concentration of the fibers is alleviated after processing. On the other hand, when the top sheet is a nonwoven fabric, the fibers constituting the nonwoven fabric are arranged in a non-uniform direction, and thus the fibers in the processed portion and the surrounding fibers and the fibers in the unprocessed portion are not connected. In addition, when a force is applied by processing, the processing point and the fibers around it are strongly entangled with each other, so that the processing point and the fibers around it are difficult to be pulled back from the unprocessed portion. Therefore, the fibers remain concentrated even after processing at the processing location and the periphery thereof.

As described above, in the absorbent article of the present application, since the concentration of the processed portion (diffusion inhibiting portion) and the fibers around it is alleviated after processing, the density of the diffusion inhibiting portion and the periphery thereof is lower than that of the surface sheet of the nonwoven fabric. Because of this, the difference between the density of the diffusion suppressing unit and its surroundings and the density of the unprocessed area is small, so it is possible to suppress the diffusion of bodily fluid from a low density place to a high place due to a capillary phenomenon (body fluid diffusion due to the difference in density). .

According to a preferred aspect, the extension portion may have a diffusion inhibiting region in which a plurality of diffusion inhibiting portions disposed at intervals are present. The spacing may be 3 mm or less.

In the diffusion suppressing region, since the diffusion suppressing portions are arranged at close intervals, in the diffusion suppressing region, diffusion of the body fluid is suppressed by at least one of the plurality of diffusion suppressing units, and the spread of the body fluid can be suppressed from widespread.

According to a preferred embodiment, the plurality of diffusion suppressing units include a plurality of first diffusion suppressing units disposed at intervals in the arrangement direction, and a second diffusion suppressing unit disposed at a position shifted in a direction orthogonal to the arrangement direction. Also good. At a time point along the orthogonal direction, the second diffusion suppressing portion may be disposed between the plurality of first diffusion suppressing portions.

Since the second diffusion inhibiting portion is positioned in a diffusion direction (ie, orthogonal direction) of the body fluid that passes through and diffuses between the first diffusion inhibiting portions, diffusion of the body fluid is suppressed.

According to a preferred embodiment, a distance of the plurality of first diffusion suppressing portions and the second diffusion suppressing portions in the orthogonal direction may be 3 mm or less.

Since the distance between the first diffusion suppressing unit and the second diffusion suppressing unit is short, diffusion of the body fluid passing between the first diffusion suppressing unit can be further suppressed.

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

Since the diffusion suppressing region extends continuously in the width direction, it is possible to increase the likelihood that the body fluid that diffuses in the longitudinal direction is blocked by the diffusion suppressing unit.

According to a preferred embodiment, the diffusion suppressing region may be continuously extended along the outer edge of the top sheet in plan view in the thickness direction.

It is possible to suppress the spread of body fluid to the outer edge of the surface sheet.

According to a preferred aspect, the diffusion suppressing portion may be configured at least by a pressing portion in which the top sheet is compressed in the thickness direction.

Even if the crimping portion and the yarn around it are temporarily stretched to the processing location by the force at the time of processing the extension portion for forming the crimping portion, the crimping portion and the yarn around it are pulled back from the unprocessed portion. Therefore, even if the fibers constituting the yarn are concentrated at the time of processing in the crimping portion and its periphery, the concentration of the fibers is relieved after processing. As a result, the density of the pressed portion and its periphery is lower than that of the nonwoven surface sheet, so that the difference between the density of the pressed portion and its periphery and the density of the unprocessed portion is small, and the diffusion of body fluid due to the difference in density can be suppressed. have.

According to a preferred aspect, the diffusion suppressing portion may be formed at least by an opening penetrating the topsheet in the thickness direction.

Even if the thread around the opening is temporarily tensioned to the processing location by the force when processing the extension for forming the opening, the thread around the opening is pulled back from the unprocessed portion. Therefore, even if the fibers constituting the yarn are concentrated in the periphery of the opening during processing, the concentration of the fibers is alleviated after processing. As a result, since the density of the periphery of the opening is lower than that of the surface sheet of the nonwoven fabric, the difference between the density of the periphery of the opening and the density of the unprocessed portion is small, and the diffusion of body fluid due to the difference in density can be suppressed.

According to a preferred aspect, the fabric or yarn constituting the knitted fabric may be composed of non-fused fibers.

Since the yarn is a non-fused fiber, it is possible to suppress the occurrence of a high-density fused portion in the surface sheet even if there is a thermal process during the production of the absorbent article. As a result, diffusion of body fluid due to a difference in density can be suppressed.

According to a preferred aspect, the surface sheet may be the fabric or the knitted fabric having elasticity.

In the case where the diffusion restraining part is composed of a crimping part, the force by which the crimped part and the yarn around it are pulled back from the unprocessed part is greater due to the expansion and contraction of the surface sheet, which is a fabric or knitted fabric, so that the crimping part and the yarn around it are It can further alleviate the concentration of the constituent fibers. As a result, it is possible to further reduce the difference between the density of the pressed portion and its surroundings and the density of the unprocessed portion, so that diffusion of body fluid due to the difference in density can be further suppressed. In addition, when the diffusion suppressing portion is formed of an opening, the force by which the thread around the opening is pulled back from the unprocessed portion increases due to the expansion and contraction of the surface sheet, so that the opening is widened. As a result, since contact of the fibers constituting the yarn can be further suppressed, diffusion of body fluid through the fibers can be suppressed.

According to a preferred aspect, the absorbent article may have a back sheet which is in contact with the extension and is a liquid-impermeable film. The diffusion suppressing portion may be configured at least by a pressing portion in which the top sheet and the back sheet are compressed in the thickness direction. In the pressing portion, a part of the back sheet may be inserted between fibers of the fabric or yarn constituting the knitted fabric.

Since a part of the back sheet, which is a liquid-impermeable sheet, is sandwiched between the fibers constituting the yarn in the pressing portion, the diffusion of body fluid is blocked by the part of the back sheet that is inserted between the fibers, and the diffusion of the body fluid is suppressed.

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

Since a part of the back sheet, which is a liquid-impermeable film, enters the opening, the diffusion of body fluid is blocked by a part of the back sheet entering the opening, and diffusion of the body fluid is suppressed.

(2) Schematic configuration of absorbent articles

Hereinafter, with reference to the drawings, and in the description of the drawings below, 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 is different from that of the actual one. Therefore, specific dimensions and the like should be determined in consideration of the following description. In addition, portions having different dimensions or ratios between the drawings may be included.

1 is a plan view of an absorbent article according to an embodiment viewed from the skin surface side. 2 is a cross-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. The "skin side" corresponds to the side facing the wearer's skin during use. The "non-skin surface side" corresponds to the side facing the wearer's skin during use.

The absorbent article 1 has a crotch region S1, a front region S2, and a rear region S3. The crotch region S1 is an area facing the wearer's excretory mouth, for example, a vaginal mouth. When the absorbent article 1 is attached to the undergarment, the crotch region S1 is an area disposed between the crotch portion of the undergarment and between both legs of the wearer.

The front region S2 is located in front of the crotch region S1. The rear region S3 is located behind the crotch region S1.

The absorbent article 1 includes an absorber 10, a top sheet 20, a back sheet 30, and a side sheet 40.

The absorber 10 is a member comprising an absorbent material. The absorber 10 is not particularly limited, but may contain a hydrophilic fibrous layer such as pulp, and a super absorbent polymer (SAP), or a combination thereof.

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

Woven fabrics and knitted fabrics are made of yarns that are braided by binding a plurality of fibers. The fabric is constructed by weaving a thread. For example, the surface sheet 20 may be a woven fabric woven with any of plain weave, twill weave, and weave (main weave). Knitting is constructed by knitting threads. For example, the top sheet 20 may be a knitted fabric knitted by any one of T-cloth, Tricot, Plyze, Pique, Honeycomb Mesh, Double Knit, and Emoji. The arrangement of fibers constituting the woven and knitted fabric is arranged along the yarn length direction. The yarn constituting the woven or knitted fabric may be composed of non-fused fibers. Non-fused fibers are, for example, cotton, rayon, cellulose, silk and the like.

In addition, the nonwoven fabric is a three-dimensional fiber aggregate formed by bonding with an adhesive, heat, or mechanical entanglement of fibers independently dispersed for each one. The arrangement of fibers constituting the nonwoven fabric is random.

The top sheet 20 has an extension portion 22 extending outward from the outer edge of the absorber 10. The extension part 22 has a diffusion suppressing part 25. The diffusion suppressing portion 25 may be formed, for example, by processing in which a force is applied in the thickness direction T. The diffusion suppressing portion 25 may have a smaller length in the thickness direction T, as compared to an unprocessed portion in which the extension portion 22 is not processed, for example. Therefore, the length in the thickness direction T of the diffusion suppressing portion 25 of the top sheet 20 (extended portion 22) is less than the length in the thickness direction T of the unprocessed portion of the top sheet 20 small. Details of the diffusion suppressing unit 25 will be described later. The extension part 22 may have a diffusion suppressing region R in which a plurality of diffusion suppressing parts 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, in the back sheet 30, a portion extending outward from the outer periphery of the absorbent body 10 contacts the extension portion 22.

The side sheet 40 is disposed outside the width direction W. The side sheet 40 covers the outer edge (outer end of the width direction W) of the top sheet 20. In order to prevent acupuncture points from flowing over the side sheet 40 to the outside of the absorbent article 1, the side sheet 40 is preferably hydrophobic or water-repellent.

(3) diffusion suppression unit (25)

3 is a schematic diagram (cross-sectional view) for explaining the diffusion suppressing unit 25. Specifically, it is a cross-sectional view of the diffusion suppressing portion 25 in the longitudinal direction L and in the thickness direction T. 4 is a schematic diagram (plan view) for explaining the diffusion suppressing unit 25. It is a plan view of the diffusion suppressing part 25 as seen from the skin surface side (thickness direction T).

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

Since the surface sheet 20, which is a woven or knitted fabric, is made of yarn, the threads of the crimping portion 25A and the peripheral portion 251, which are the periphery thereof, and the threads of the unprocessed unprocessed portion 252 of other surface sheets are continuously It is connected. For this reason, even if the thread of the crimping part 25A and the peripheral part 251 is temporarily tensioned to the processing location by the force when processing the extension part 22 for forming the crimping part 25A, the crimping part (25A) and the thread of the peripheral part 251 are pulled back from the unprocessed part 252. Therefore, in the crimping portion 25A and the peripheral portion 251, even if the fibers constituting the yarn are concentrated during processing, the concentration of the fibers is relieved after processing. As a result, the density of the pressed portion 25A and the peripheral portion 251 is lowered compared to the top sheet of the nonwoven fabric. In particular, the density of the peripheral portion 251 is not very different from that 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 becomes small, diffusion of body fluid (diffusion in the direction of arrow M) due to the difference in density can be suppressed.

Further, the density of the compressed portion 25A is greater than that of the unprocessed portion 252. The rate of diffusion from the densely pressed portion 25A to the low-density unprocessed portion 252 (the rate at which it diffuses in the direction of arrow P) is the rate at which it diffuses in the unprocessed portion 252 (the rate at which it diffuses in the direction of arrow Q) Since it is slower, the diffusion of body fluid in the extension portion 22 can be suppressed by the extension portion 22 having the compression portion 25A as the diffusion suppressing portion 25.

As shown in Figs. 1 and 4, in the diffusion suppressing region R, a plurality of diffusion suppressing portions 25 (first diffusion suppressing portions 25A1) disposed at intervals a1 are present. The spacing a1 is 3 mm or less. In the diffusion suppressing region R, since the diffusion suppressing portions 25 are arranged at close intervals a1, in the diffusion suppressing region R, at least any of the diffusion suppressing portions 25 ) To suppress the spread of body fluids. As a result, it is possible to suppress widespread spread of body fluid.

In addition, the plurality of diffusion suppressing units 25 include a plurality of first diffusion suppressing units 25A1 arranged at intervals a1 in the arrangement direction, and a second diffusion suppressing unit 25A1 arranged at a position shifted in a direction orthogonal to the arrangement direction. It has a diffusion suppressing part 25A2. At the time point along the orthogonal direction, the second diffusion suppressing portion 25A2 is disposed between the plurality of first diffusion suppressing portions 25A1. Thereby, since the second diffusion inhibiting portion 25A2 is positioned in the diffusion direction (ie, orthogonal direction) of the body fluid that passes through and diffuses between the first diffusion inhibiting portions 25A1, diffusion of the body fluid is suppressed.

The distance a2 in the orthogonal direction between the first diffusion suppressing portion 25A1 and the second diffusion suppressing portion 25A2 may be less than 3 mm. Accordingly, since the distance a2 between the first diffusion suppressing unit 25A1 and the second diffusion suppressing unit 25A2 is short, diffusion of the body fluid passing between the first diffusion suppressing unit 25A1 can be further suppressed. I can.

The diffusion suppressing region R may extend continuously in the width direction W. Thereby, the possibility that the bodily fluid diffused in the longitudinal direction L is blocked by the diffusion suppressing unit 25 can be increased.

The diffusion suppressing region R may extend continuously along the outer edge of the top sheet 20 in plan view. It is possible to suppress the spread of body fluid to the outer edge of the top sheet 20.

The diffusion suppressing portion 25 may be constituted by at least a pressing portion 25A in which the top sheet 20 and the back sheet 30 are compressed in the thickness direction T. In that case, in the crimping portion 25A, a part of the back sheet 30 may be contained between the fibers of the woven fabric or the yarn constituting the knitted fabric. For example, by embossing the top sheet 20 and the back sheet 30 together, a part of the back sheet 30 is melted, so that the back sheet 30 is formed between the fibers of the yarn of the top sheet 20. It may contain some. Thereby, the diffusion of body fluid is blocked by a part of the back sheet 30 interposed between the fibers, and diffusion of the body fluid is suppressed.

On the other hand, when the yarn constituting the top sheet 20 is a non-fused fiber, it is possible to suppress the occurrence of a high-density fused portion in the top sheet 20 even if there is thermal processing at the time of manufacture of the absorbent article. . As a result, diffusion of body fluid due to a difference in density can be suppressed.

In addition, when the surface sheet 20 is a fabric or knitted fabric having elasticity, by the stretching of the surface sheet 20, which is a fabric or knitted fabric, the thread of the pressed portion 25A and the peripheral portion 251 is removed from the unprocessed portion 252. Since the tensile return force becomes larger, it is possible to further alleviate concentration of fibers constituting the yarn in the crimping portion 25A and the peripheral portion 251. As a result, since 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, diffusion of body fluid due to the difference in density can be further suppressed.

(4) Second embodiment

The absorbent article 1 according to the second embodiment will be described. 5 is a schematic diagram of a diffusion suppressing unit 25 for explaining the absorbent article 1 according to the second embodiment.

The diffusion suppressing portion 25 is configured at least by an opening 25B penetrating the top sheet 20 in the thickness direction T. The opening 25B may be formed by compressing the top sheet 20 in the thickness direction T by, for example, embossing. The opening 25B may be formed, for example, by a cutting tool such as a cutter.

Since the woven or knitted top sheet 20 is made of yarn, the yarn in the peripheral portion 251 around the opening 25B and the yarn in the unprocessed unprocessed portion 252 of the other top sheet are continuously connected. . For this reason, even if the thread of the peripheral portion 251 is temporarily stretched to the processing location by the force when processing the extension portion 22 for forming the opening 25B, the thread of the peripheral portion 251 is not processed. Tension is returned from (252). Therefore, in the peripheral portion 251, even if the fibers constituting the yarn are concentrated during processing, the concentration of the fibers is relieved after processing. The density of the peripheral portion 251 is not very different from that of the unprocessed portion 252. As a result, since the density of the peripheral portion 251 is lower than that of the nonwoven surface sheet, the difference between the density of the peripheral portion 251 and the density of the unprocessed portion 252 is small, and the diffusion of body fluid due to the difference in density can be suppressed. I can.

Further, the fibers of the yarn constituting the woven or knitted fabric are cut by processing the extension portion 22 for forming the opening 25B. As a result, it is possible to suppress the body fluid from spreading (diffusion in the direction of the arrow S) via the fibers of the yarn. For this reason, diffusion of body fluid in the extension part 22 can be suppressed.

A part of the back sheet 30 may be contained in the opening 25B. For example, when forming the opening 25B in the front sheet 20 and the back sheet 30 together, a part of the back sheet 30 is cut off, so that a part of the back sheet 30 is formed in the opening 25B. You may enter. Thereby, the diffusion of the body fluid is blocked by a part of the back sheet 30 entering the opening 25B, and diffusion of the body fluid can be suppressed.

In addition, in the case where the top sheet 20 is a fabric or knitted fabric having elasticity, due to the stretching of the top sheet 20, the force at which the yarn of the peripheral portion 251 is pulled back from the unprocessed portion 252 becomes larger, so that the opening (25B) widens. As a result, since contact of the fibers constituting the yarn can be further suppressed, diffusion of body fluid through the fibers can be suppressed.

(5) Other embodiments

In each of the above-described embodiments, the crimp portion 25A and the opening 25B were circular in plan view, but are not limited thereto. For example, the crimping portion 25A and the opening 25B may have a slit shape extending in a predetermined direction in plan view. The predetermined direction may be, for example, the width direction W. Thereby, the possibility that the bodily fluid diffused in the longitudinal direction L is blocked by the diffusion suppressing portion 25 can be increased.

In each of the above-described embodiments, the spacing a1 may be 0.5 mm or more. Further, the distance a2 may be 0.5 mm or more. Thereby, since a region capable of absorbing bodily fluid can be secured in the region between the diffusion suppressing portions 25, leakage of bodily fluid can be suppressed.

The absorbent article of the present embodiment has been described using a sanitary napkin as an example, but is not limited thereto. The present invention may be applied to other absorbent articles (eg, panty liners, breast milk pads, adult incontinence pads, fecal pads or sweat absorbing sheets). In particular, the present invention may be applied to an article in which the absorbent article is used by being attached to the inside of a worn article such as an undergarment of a user.

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 modified embodiment 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.

(6) Comparative evaluation

A comparative evaluation of inhibition of body fluid diffusion will be described. Specifically, in each of the Examples and Comparative Examples, first, a pressing portion (embossed portion) was formed by compressing the top sheet and the back sheet in the thickness direction T. Acupoints were dripped at a location 20 mm away from the boundary between the embossed portion and the non-embossed portion in the longitudinal direction (L). Specifically, the cycle of dropping 1 ml of acupuncture points for 5 seconds and leaving it for 5 seconds was repeated 4 times. After 30 minutes, the length (diffusion length) of the acupuncture points in the longitudinal direction was measured.

In Examples 1 and 2, the top sheet was formed on a sheet of paper, and the weight per unit area was 100 gsm. In the first embodiment, a pressing portion and a plurality of openings are formed as the diffusion suppressing portion. In Example 2, a pressing portion is formed as the diffusion suppressing portion.

In Examples 3 and 4, the top sheet was formed by tricot, and the weight per unit area was 100 gsm. In the third embodiment, a pressing portion and a plurality of openings are formed as the diffusion suppressing portion. In the fourth embodiment, a pressing portion is formed as the diffusion suppressing portion.

In Comparative Examples 1 and 2, the top sheet was a nonwoven fabric (Cotton SL), and the weight per unit area was 105 gsm. In Comparative Example 1, a pressing portion and a plurality of openings were formed as the diffusion suppressing portion. In Comparative Example 2, a pressing portion was formed as the diffusion suppressing portion.

In Comparative Examples 3 and 4, the top sheet was a nonwoven fabric (MVF30), and the weight per unit area was 90 gsm. In Comparative Example 3, a pressing portion and a plurality of openings were formed as the diffusion suppressing portion. In Comparative Example 4, a pressing portion was formed as the diffusion suppressing portion.

In each Example and each Comparative Example, the weight per unit area of the absorber was 300 gsm. The weight per unit area of the back sheet is 23.5 gsm.

As shown in Table 1, it can be seen that the absorbent article according to Example 1-4 has a shorter diffusion length than the absorbent article according to Comparative Example 1-4. In Comparative Example 1-4, even when reaching the diffusion inhibiting portion, the acupoint was spreading, whereas in Example 1-4, the diffusion of acupoint reaching the diffusion inhibiting portion was suppressed.

In addition, when the diffusion length was measured under the same conditions using that the surface sheet was a fabric, it was confirmed that the diffusion of body fluids could be suppressed as in Example 1-4.

As described above, it can be seen that in the absorbent article according to the present invention, diffusion of body fluids can be suppressed.

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 the purpose of illustrative description and does not have any limiting meaning with respect to the present invention.

According to the above aspect, it is possible to provide an absorbent article capable of suppressing the diffusion of body fluid in the extended portion of the topsheet extending outward from the outer edge of the absorber.

1: absorbent article
10: absorber
20: surface sheet
22: extension
25A: crimping part
25A1: first diffusion suppressor
25A2: second diffusion suppressor
25B: opening
251: periphery
252: unprocessed part
30: back sheet
40: side seat
L: longitudinal direction
W: width direction
T: thickness direction
S1: crotch area
S2: front area
S3: posterior region

Claims (12)

A longitudinal direction, a width direction, and a thickness direction orthogonal to each other, and
Absorber,
Surface sheet disposed on the skin side than the absorber
As an absorbent article having,
The top sheet has an extension portion extending outward from an outer edge of the absorber,
The extension portion has a diffusion suppression portion,
The top sheet is a woven or knitted absorbent article. The method of claim 1, wherein the extension portion has a diffusion inhibiting region in which a plurality of diffusion inhibiting portions are disposed at intervals,
The absorbent article having a spacing of 3 mm or less. The apparatus of claim 2, wherein the plurality of diffusion suppressing units include a plurality of first diffusion suppressing units disposed at intervals in the arrangement direction, and a second diffusion suppressing unit disposed at a position shifted in a direction orthogonal to the arrangement direction. ,
An absorbent article in which the second diffusion suppressing portion is disposed between the plurality of first diffusion suppressing portions at a time point along the orthogonal direction. The absorbent article according to claim 3, wherein a distance of the plurality of first diffusion suppressing portions and the second diffusion suppressing portions in the orthogonal direction is 3 mm or less. The absorbent article according to any one of claims 2 to 4, wherein the diffusion suppressing region continuously extends in the width direction. The absorbent article according to any one of claims 2 to 4, wherein the diffusion suppressing region continuously extends along an outer edge of the top sheet in plan view in the thickness direction. The absorbent article according to any one of claims 1 to 4, wherein the diffusion suppressing portion is formed at least by a pressing portion in which the top sheet is compressed in the thickness direction. The absorbent article according to any one of claims 1 to 4, wherein the diffusion suppressing portion is formed at least by an opening portion penetrating the surface sheet in the thickness direction. The absorbent article according to any one of claims 1 to 4, wherein the woven fabric or yarn constituting the knitted fabric is made of non-fused fibers. The absorbent article according to any one of claims 1 to 4, wherein the top sheet is the fabric or knitted fabric having elasticity. The absorbent article according to any one of claims 1 to 4, wherein the absorbent article has a back sheet that is in contact with the extension and is a liquid impermeable film,
The diffusion suppressing portion is configured at least by a pressing portion in which the top sheet and the back sheet are compressed in the thickness direction,
An absorbent article in which a part of the back sheet is inserted between fibers of the fabric or yarn constituting the knitted fabric in the pressing portion. The absorbent article according to any one of claims 1 to 4, wherein the absorbent article has a back sheet that is in contact with the extension and is a liquid impermeable film,
The diffusion suppressing portion is configured at least by an opening penetrating the surface sheet in the thickness direction,
An absorbent article in which a part of the back sheet enters the opening.

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