TW201934097A - Absorbent article - Google Patents

Abstract

An 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 topsheet (20) that is disposed on the skin surface side of the absorber. The topsheet has an extension part (22) that extends outward beyond the outer edge of the absorber. The extension part has a diffusion suppression part (25). The topsheet is either a fabric or a knit.

Description

Absorbent article

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

The absorbent article disclosed in Patent Document 1 includes an absorbent body and a surface sheet made of a non-woven fabric disposed on the muscle surface side of the absorbent body. Since the nonwoven fabric is liquid-permeable, the body fluid of the wearer is absorbed by the absorbent body through the surface sheet.

[Patent Document 1] Japanese Patent Laid-Open No. 2013-85831

[Problems to be solved by the invention]

In order to prevent the absorbent body from escaping to the outside, the extended portion of the front sheet and the extended portion of the back sheet which are extended to the outer side than the outer edge of the absorbent body are thermally welded by embossing to form a sealing portion. Since the sealing portion is compressed in the thickness direction by embossing, its density is higher than the periphery of the sealing portion. Therefore, based on the capillary phenomenon, body fluids diffuse from a low density to a high density. Since the extension portion of the surface sheet does not overlap the absorbent body, the body fluid is hardly absorbed by the absorbent body at this extension portion. Therefore, the body fluid that has spread on the extension of the surface sheet is likely to come into contact with the skin, and there is a concern that the wearer may feel uncomfortable.

Therefore, an absorbent article capable of suppressing the diffusion of body fluids at the extension portion of the surface sheet extending to the outer side than the outer edge of the absorbent body is expected.

[Technical means to solve the problem]

One aspect of the absorbent article includes a length direction, a width direction, and a thickness direction orthogonal to each other, an absorbent body, and a surface sheet disposed on the muscle surface side of the absorbent body, the surface sheet having: The outer edge of the absorbent body is an extension portion further outside, the extension portion has a diffusion suppressing portion, and the surface sheet is a woven fabric or a knitted fabric.

(1) Outline of Embodiments At least the following matters can be understood from the description of the present specification and the accompanying drawings.

An aspect of the absorbent article includes a length direction, a width direction, and a thickness direction orthogonal to each other, an absorbent body, and a surface sheet disposed on the muscle surface side of the absorbent body, the surface sheet having: The outer edge of the absorbent body is an extension portion further outside, the extension portion has a diffusion suppressing portion, and the surface sheet is a woven fabric or a knitted fabric.

When the extension portion of the surface sheet is processed to form a diffusion suppression portion, a processing portion (diffusion suppression portion) of the extension portion is urged. Thereby, the density of a processed part and its periphery becomes high. In the absorbent article of the present invention, the surface sheet is a woven fabric or a knitted fabric, and the surface sheet is composed of threads. The line of the processing part and its periphery, and the line of the unprocessed unprocessed part of the surface sheet (for example, the part arrange | positioned on the muscle surface side of an absorber) are both connected continuously. Therefore, even if the processing part and the surrounding line are temporarily stretched at the processing part by the force at the time of processing the extension part, the processing part and the surrounding line are pulled back from the unprocessed part. Therefore, even if the fibers constituting the thread are concentrated at the processing site and its periphery during processing, the concentration of fibers after processing is reduced. On the other hand, when the surface sheet is a non-woven fabric, because the arrangement direction of the fibers constituting the non-woven fabric is not uniform, both the fibers at the processing site and its surroundings and the fibers at the unprocessed part are not necessarily connected. Furthermore, if a force is applied by processing, fibers at the processing site and its surroundings will become entangled with each other, so it will be difficult for the fibers at the processing site and its surroundings to be pulled back from the unprocessed part. Therefore, at the processing site and its surroundings, fibers remain concentrated after processing.

As described above, after processing of the absorbent article of the present invention, the concentration of fibers in the processing portion (diffusion suppression portion) and its surroundings is relaxed, and the density of the diffusion suppression portion and its surroundings is lower than that of the non-woven surface sheet. . Therefore, the difference between the density of the diffusion suppressing portion and its surroundings and the density of the unprocessed portion is reduced, and it is possible to suppress the diffusion of body fluid from the low density to the high density due to the capillary phenomenon (body fluid diffusion due to density difference).

According to a preferred aspect, the extension portion may have a diffusion suppression region, and the diffusion suppression region may include a plurality of diffusion suppression portions arranged at intervals. The aforementioned interval may be 3 mm or less.

In the diffusion suppression region, the diffusion suppression sections are arranged at a short distance. In the diffusion suppression region, at least one of the plurality of diffusion suppression sections can suppress the diffusion of body fluids, and can suppress the large-scale diffusion of body fluids.

According to a preferred aspect, the plurality of diffusion suppressing sections may include a plurality of first diffusion suppressing sections arranged at intervals in the arrangement direction, and disposed at staggered positions in an orthogonal direction orthogonal to the arrangement direction. The second diffusion suppressing section. From a viewpoint along the orthogonal direction, the second diffusion suppression unit may be disposed between the plurality of first diffusion suppression units.

In the diffusion direction (that is, the orthogonal direction) of the body fluid that diffuses between the first diffusion suppressing sections, the second diffusion suppressing section is present, and thus the diffusion of the body fluid can be suppressed.

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

Since the distance between the first diffusion suppressing section and the second diffusion suppressing section is short, it is possible to further suppress the diffusion of body fluid between the first diffusion suppressing sections.

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

Since the diffusion suppressing region extends continuously in the width direction, the possibility that the body fluid that diffuses in the length direction is intercepted by the diffusion suppressing section increases.

According to a preferred aspect, the diffusion suppression region may continuously extend along the outer edge of the surface sheet in a plan view toward the thickness direction.

In this way, the diffusion of body fluids can be suppressed up to the outer edge of the surface sheet.

According to a preferred aspect, the diffusion suppressing portion may be composed of at least an extruding portion obtained by compressing the surface sheet in the thickness direction.

Even when the extension portion is processed to form the pressing portion, the line of the pressing portion and its surroundings is temporarily stretched at the processing portion, and the line of the pressing portion and its surroundings is pulled back from the unprocessed portion. . Therefore, even if the fibers constituting the thread are concentrated in the pressing portion and its periphery during processing, the concentration of fibers after processing is reduced. In this way, compared to the non-woven surface sheet, the density of the extruded portion and its periphery becomes lower, so the difference between the density of the extruded portion and its periphery and the density of the unprocessed portion is reduced, and the body fluid diffusion caused by the density difference can be suppressed. .

According to a preferred aspect, the diffusion suppressing portion may include at least an opening portion penetrating the surface sheet in the thickness direction.

Even when the extension portion is processed to form the opening portion, the peripheral line of the opening portion is temporarily stretched at the processing portion, and the peripheral line of the opening portion is pulled back from the unprocessed portion. Therefore, even if the fibers constituting the thread are concentrated at the periphery of the opening portion during processing, the concentration of fibers after processing is reduced. In this way, the density of the periphery of the opening is lower than that of the non-woven surface sheet, so the difference between the density of the periphery of the opening and the density of the unprocessed portion is reduced, and the diffusion of body fluids caused by the density difference can be suppressed.

According to a preferred aspect, the threads constituting the woven fabric or the knitted fabric may be composed of non-fusible fibers.

Since the thread is a refractory fiber, even if thermal processing is involved in the manufacture of the absorbent article, the occurrence of high-density fused portions on the surface sheet can be suppressed. As a result, the diffusion of body fluids caused by the difference in density can be suppressed.

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

When the diffusion suppressing portion is composed of a pressing portion, the force of pulling the surface of the pressing portion and its surroundings from the unprocessed portion becomes greater by using the expansion and contraction of the surface sheet made of woven fabric or knitted fabric. Concentration of fibers constituting the thread becomes more moderate at the squeeze portion and its periphery. As a result, the difference between the density of the squeezed portion and its surroundings and the density of the unprocessed portion can be further reduced, and thus the diffusion of body fluids caused by the difference in density can be further suppressed. In addition, when the diffusion suppressing portion is constituted by the opening portion, the force of pulling the peripheral line of the opening portion back from the unprocessed portion by the expansion and contraction of the surface sheet becomes larger, so the opening portion is enlarged. As a result, the contact of the fibers constituting the thread can be further suppressed, and the diffusion of body fluids caused by advancing along the fibers can be suppressed.

According to a preferred aspect, the absorbent article may have a back sheet, which is a liquid-impermeable film that is in contact with the extension portion. The diffusion suppressing portion may include at least a pressing portion obtained by compressing the front sheet and the back sheet in the thickness direction. In the pressing portion, a part of the back sheet may be incorporated between fibers constituting the woven fabric or the thread of the knitted fabric.

A part of the back sheet made of the liquid-impermeable sheet is incorporated into the fibers between the threads constituting the squeeze portion. The part of the back sheet incorporated into the fibers can block the diffusion of body fluids and suppress the diffusion of body fluids.

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

Since a part of the back sheet made of the liquid-impermeable film is incorporated into the opening portion, the part of the back sheet incorporated into the opening portion can block the diffusion of body fluid and suppress the diffusion of body fluid.

(2) Structure of Absorbent Article Hereinafter, an absorbent article according to an embodiment will be described with reference to the drawings. In the description of the following drawings, the same or similar parts are denoted by the same or similar symbols. However, it should be noted that the drawings are for illustration only and the ratios of the dimensions are different from reality. Therefore, specific dimensions and the like should be determined by referring 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 according to the embodiment when viewed from the muscle 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. The "muscle surface side" is equivalent to one side of the skin facing the wearer during use. The "non-muscular side" is equivalent to the side of the wearer's skin that is in use.

The absorbent article 1 includes a lower chin region S1, a front region S2, and a rear region S3. The submental region S1 is a region facing the excretory opening of the wearer, for example, the vaginal opening. When the absorbent article 1 is installed in underwear, the lower crotch region S1 is disposed in the lower crotch of the underwear, and is disposed in a region between the legs of the wearer. The front side region S2 is located more forward than the lower subregion S1. The rear side area S3 is located further rearward than the inferior area S1.

The absorbent article 1 includes an absorber 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, and may include a pulp-like hydrophilic fiber layer, a super absorbent polymer (SAP), or a combination thereof.

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

Woven fabrics and knitted fabrics are made by bundling and twisting many fibers into a thread. The woven fabric is formed by weaving a thread. For example, the surface sheet 20 may be a woven fabric made of plain weave, twill weave, or satin weave (Zhuzi weave). The knitted fabric is constituted by knitting threads. For example, the surface sheet 20 may be a knitted fabric knitted from a jersey, a Tricot knitted fabric, a rib fabric, a raised fabric, a honeycomb fabric, a corrugated fabric, or a pile fabric. The fibers constituting the woven fabric and knitted fabric are arranged along the line length direction. The thread constituting the woven fabric or knitted fabric may be composed of refractory fibers. Refractory fibers are, for example, cotton, rayon, cellulose, silk, and the like.

The non-woven fabric is a three-dimensional fiber assembly formed by bonding each independently dispersed fiber with an adhesive, heat, or mechanical entanglement. The arrangement of the fibers constituting the nonwoven fabric is irregular.

The surface sheet 20 includes an extending portion 22 extending to the outside of the outer edge of the absorbent body 10. The extension portion 22 includes a diffusion suppression portion 25. The diffusion suppressing portion 25 can be formed by, for example, a process 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 than the unprocessed unprocessed portion of the extension portion 22, for example. Therefore, the length of the diffusion suppressing portion 25 of the surface sheet 20 (the extending portion 22) in the thickness direction T is smaller than the length of the unprocessed portion of the surface sheet 20 in the thickness direction T. A detailed description of the diffusion suppression unit 25 will be described later. The extension portion 22 may have a diffusion suppression region R, and the diffusion suppression region R may include a plurality of diffusion suppression portions 25 arranged at intervals.

The back sheet 30 is disposed on the non-muscle 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 portion 22. Specifically, a portion of the back sheet 30 extending to the outside of the outer edge of the absorbent body 10 is in contact with the extending portion 22.

The side sheet 40 is arranged outside the width direction W. The side sheet 40 covers the outer side edge (the outer end of the width direction W) of the surface sheet 20. In order to prevent menstrual blood from flowing out of the absorbent article 1 beyond the side sheet 40, the side sheet 40 preferably has hydrophobicity or water repellency.

(3) Diffusion suppression section 25
FIG. 3 is a schematic diagram (cross-sectional view) for explaining the diffusion suppressing section 25. Specifically, it is a cross-sectional view of the diffusion suppressing section 25 in the longitudinal direction L and the thickness direction T. FIG. 4 is a schematic diagram (plan view) for explaining the diffusion suppressing section 25, and is a plan view of the diffusion suppressing section 25 when viewed from the muscle 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 that compresses the surface sheet 20 in the thickness direction T. The pressing portion 25A can be formed by, for example, embossing using a circular pin, and compressing the surface sheet 20 in the thickness direction T. The pressing portion 25A (the diffusion suppressing portion 25) may have a circular shape in a plan view when viewed from the muscle surface side.

The surface sheet 20 made of woven fabric or knitted fabric is composed of threads, and the threads on the pressing portion 25A and the peripheral portion 251 of the periphery thereof and the unprocessed unprocessed portion 252 of the other surface sheet Line, the two are continuously connected. Therefore, even if the extension portion 22 is processed to form the pressing portion 25A, the lines of the pressing portion 25A and the peripheral portion 251 are temporarily stretched at the processing portion. The thread will be pulled back from the unprocessed part 252. Therefore, in the pressing portion 25A and the peripheral portion 251, even if the fibers constituting the thread are concentrated during processing, the concentration of the fibers is reduced after processing. In this way, the density of the pressing portion 25A and the peripheral portion 251 is lower than that of the surface sheet of the non-woven fabric. In particular, the density of the peripheral portion 251 and the density of the unprocessed portion 252 remain unchanged. Since the difference between the density of the pressing portion 25A and the peripheral portion 251 and the density of the unprocessed portion 252 is reduced, the diffusion of body fluids (diffusion in the direction of arrow M) caused by the difference in density can be suppressed.

The density of the pressing portion 25A is greater than the density of the unprocessed portion 252. Because the speed of diffusion from the denser pressing portion 25A to the less dense unprocessed portion 252 (the rate of diffusion in the arrow P direction) is slower than the rate of diffusion in the unprocessed portion 252 (the rate of diffusion to the arrow Q direction), By providing the extension portion 22 with the pressing portion 25A as the diffusion suppressing portion 25, the diffusion of body fluid in the extension portion 22 can be suppressed.

As shown in FIGS. 1 and 4, in the diffusion suppression region R, there are a plurality of diffusion suppression sections 25 (first diffusion suppression sections 25A1) arranged at intervals a1. The interval a1 is 3 mm or less. In the diffusion suppression region R, the diffusion suppression units 25 are arranged at a close interval a1. In the diffusion suppression region R, at least one of the plurality of diffusion suppression units 25 can suppress the diffusion of body fluids. As a result, it is possible to suppress a wide range of body fluid diffusion.

In addition, the plurality of diffusion suppressing sections 25 include a plurality of first diffusion suppressing sections 25A1 arranged in the arrangement direction with an interval a1 therebetween, and a second diffusion suppressing member arranged at a staggered position in an orthogonal direction orthogonal to the arrangement direction.部 25A2. From a viewpoint along the orthogonal direction, the second diffusion suppression unit 25A2 is arranged between the plurality of first diffusion suppression units 25A1. As described above, in the diffusion direction (that is, orthogonal direction) of the body fluid that diffuses between the first diffusion suppression units 25A1, the presence of the second diffusion suppression unit 25A2 can suppress the diffusion of body fluids.

The distance a2 in the orthogonal direction between the first diffusion suppression portion 25A1 and the second diffusion suppression portion 25A2 may be less than 3 mm. In this way, since the distance a2 between the first diffusion suppression unit 25A1 and the second diffusion suppression unit 25A2 is short, it is possible to further suppress the diffusion of body fluids between the first diffusion suppression unit 25A1.

The diffusion suppression region R may continuously extend in the width direction W. In this way, the possibility that the body fluid that diffuses in the longitudinal direction L is intercepted by the diffusion suppressing section 25 is increased.

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

The diffusion suppressing portion 25 may be formed of at least a pressing portion 25A that compresses the front sheet 20 and the back sheet 30 in the thickness direction T. In this case, in the pressing portion 25A, a part of the back sheet 30 may be incorporated between the fibers constituting the threads of the woven or 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, and a part of the back sheet 30 is incorporated between the fibers of the line of the top sheet 20. Thereby, a part of the back sheet 30 incorporated between the fibers can block the diffusion of the body fluid and suppress the diffusion of the body fluid.

When the threads constituting the surface sheet 20 are refractory fibers, it is possible to suppress the occurrence of high-density fused portions on the surface sheet 20 even if thermal processing is included in the manufacture of the absorbent article. As a result, the diffusion of body fluids caused by the difference in density can be suppressed.

In addition, when the surface sheet 20 is an elastic woven fabric or knitted fabric, the threads of the pressing portion 25A and the peripheral portion 251 are pulled from the unprocessed portion 252 by the expansion and contraction of the surface sheet 20 made of the woven fabric or knitted fabric. The returning force becomes larger, so that the concentration of the fibers constituting the threads in the pressing portion 25A and the peripheral portion 251 becomes more relaxed. As a result, the difference between the density of the pressing portion 25A and the peripheral portion 251 and the density of the unprocessed portion 252 can be further reduced, and the body fluid diffusion caused by the difference in density can be further suppressed.

(4) Second Embodiment The absorbent article 1 according to the second embodiment will be described. FIG. 5 is a schematic diagram for explaining the diffusion suppressing section 25 of the absorbent article 1 according to the second embodiment.

The diffusion suppressing portion 25 is constituted by at least an opening portion 25B penetrating the surface sheet 20 in the thickness direction T. The opening 25B can be formed by compressing the surface sheet 20 in the thickness direction T by embossing, for example. The opening 25B may be formed by, for example, processing using a cutter such as a cutter.

The surface sheet 20 made of woven fabric or knitted fabric is composed of a thread, a thread located at the peripheral portion 251 of the periphery of the opening portion 25B, and a thread of the unprocessed unprocessed portion 252 of the other surface sheet. The two are continuously connected. Therefore, even if the extension portion 22 is processed to form the opening portion 25B, the line of the peripheral portion 251 is temporarily stretched at the processing portion, and the line of the peripheral portion 251 is pulled back from the unprocessed portion 252. Therefore, in the peripheral portion 251, even if the fibers constituting the thread are concentrated during processing, the concentration of the fibers is reduced after processing. There is no change in the density of the peripheral portion 251 and the density of the unprocessed portion 252. In this way, since the density of the peripheral portion 251 is lower than that of the non-woven surface sheet, the difference between the density of the peripheral portion 251 and the density of the unprocessed portion 252 is reduced, and the diffusion of body fluids caused by the density difference can be suppressed.

In addition, by processing the extension portion 22 in order to form the opening portion 25B, the fibers of the threads constituting the woven or knitted fabric are cut. As a result, it is possible to suppress the diffusion of body fluid (diffusion in the direction of arrow S) caused by the advancement of the body fluid along the fibers of the thread. Therefore, it is possible to suppress diffusion of body fluid in the extension portion 22.

In the opening portion 25B, a part of the back sheet 30 can be incorporated. For example, when the opening sheet 25B is formed together with the front sheet 20 and the back sheet 30, a part of the back sheet 30 is notched, and a part of the back sheet 30 can be incorporated in the opening 25B. In this manner, the diffusion of body fluid is blocked by a part of the back sheet 30 incorporated in the opening 25B, and the diffusion of the body fluid can be suppressed.

In addition, when the surface sheet 20 is a woven or knitted fabric having elasticity, the force of pulling the thread of the peripheral portion 251 from the unprocessed portion 252 by the expansion and contraction of the surface sheet 20 becomes larger, so the opening portion 25B expanded. As a result, the contact of the fibers constituting the thread can be further suppressed, and the diffusion of the body fluid caused by advancing along the fibers can be suppressed.

(5) Other Embodiments In each of the above embodiments, the pressing portion 25A and the opening portion 25B are circular in a plan view, but are not limited thereto. For example, the pressing portion 25A and the opening portion 25B may have a slit shape extending in a predetermined direction in a plan view. The predetermined direction may be, for example, the width direction W. In this way, the possibility that the body fluid that diffuses in the longitudinal direction L is intercepted by the diffusion suppressing section 25 is increased.

In each of the above embodiments, the interval a1 may be 0.5 mm or more. The distance a2 may be 0.5 mm or more. In this way, in a region between the diffusion suppressing sections 25, a region capable of absorbing body fluid can be secured, and thus leakage of the body fluid can be suppressed.

Although the absorbent article of this embodiment is described by taking a sanitary napkin as an example, it is not limited to this. The present invention can also be applied to other absorbent articles (for example, pads, breast milk pads, incontinence pads for adults, fecal pads, sweat-absorbent sheets, etc.). The present invention is particularly suitable for an article that is attached to the inside of a user's underwear-like wearing article when an absorbent article is used.

The present invention has been described in detail using the above-mentioned embodiments, but it is needless to say that for those having ordinary knowledge in the technical field, the present invention is not limited to the embodiments described in this specification. The present invention can be implemented in the form of corrections and changes without departing from the spirit and scope of the present invention defined by the description of the scope of patent application. Therefore, the description in this specification is only for illustrative purposes, and is not intended to limit the present invention in any way.

(6) Comparative evaluation The comparative evaluation that suppresses the diffusion of body fluids will be described. Specifically, first, in each example and each comparative example, a pressing part (embossed part) is formed by compressing a front sheet and a back sheet in the thickness direction T. The menstrual blood was dripped at the location which is 20 mm away from the boundary between the embossed portion and the non-embossed portion along the longitudinal direction L. Specifically, a cycle of dripping 1 ml of menstrual blood within 5 seconds and letting it stand for 5 seconds was repeated four times. The length (diffusion length) of the menstrual blood diffusion in the longitudinal direction after 30 minutes was measured.

In Examples 1 and 2, the surface sheet was knitted with a jersey, and the basis weight was 100 gsm. In Example 1, a squeeze portion and a plurality of openings were formed as the diffusion suppressing portion. In Example 2, a squeeze part was formed as a diffusion suppression part.

In Examples 3 and 4, the surface sheet was knitted from Tricot knitting fabric, and the basis weight was 100 gsm. In Example 3, as the diffusion suppressing portion, a squeeze portion and a plurality of openings were formed. In Example 4, a squeeze portion was formed as a diffusion suppressing portion.

In Comparative Examples 1 and 2, the surface sheet was a nonwoven fabric (Cotton SL), and the basis weight was 105 gsm. In Comparative Example 1, a squeeze portion and a plurality of openings were formed as the diffusion suppressing portion. In Comparative Example 2, a squeeze portion was formed as a diffusion suppression portion.

In Comparative Examples 3 and 4, the surface sheet was a non-woven fabric (MVF30) and the basis weight was 90 gsm. In Comparative Example 3, a squeeze portion and a plurality of openings were formed as the diffusion suppressing portion. In Comparative Example 4, a squeeze portion was formed as a diffusion suppression portion.

Moreover, in each Example and each comparative example, the basis weight of an absorber was 300 gsm. The back sheet had a basis weight of 23.5 gsm.

[Table 1]

As shown in Table 1, the absorbent article of Example 1-4 has a shorter diffusion length than the absorbent article of Comparative Example 1-4. In Comparative Example 1-4, menstrual blood diffused even when it reached the diffusion suppressing section. In contrast, in Example 1-4, the diffusion of menstrual blood reaching the diffusion suppressing section was suppressed.

In addition, when the surface sheet was a woven fabric, the diffusion length was measured under the same conditions. As in Examples 1-4, it was confirmed that the diffusion of body fluids can be suppressed.

As can be seen from the above description, the absorbent article of the present invention can suppress the diffusion of body fluids.

The present invention has been described in detail using the above-mentioned embodiments, but it is needless to say that for those having ordinary knowledge in the technical field, the present invention is not limited to the embodiments described in this specification. The present invention can be implemented in the form of corrections and changes without departing from the spirit and scope of the present invention defined by the description of the scope of patent application. Therefore, the description in this specification is only for illustrative purposes, and is not intended to limit the present invention in any way.

[Industrial availability]

According to the aspect, it is possible to provide an absorbent article in which the extension of the surface sheet extending to the outer side than the outer edge of the absorbent body can suppress the diffusion of body fluids.

1‧‧‧ absorbent article

10‧‧‧ Absorber

20‧‧‧ surface sheet

22‧‧‧ extension

25‧‧‧Diffusion suppression section

25A‧‧‧Extrusion Department

25A1‧‧‧The first diffusion suppression unit

25A2‧‧‧Second diffusion suppression unit

25B‧‧‧Opening

251‧‧‧ Peripheral

252‧‧‧Unprocessed Department

30‧‧‧ back sheet

40‧‧‧ side sheet

L‧‧‧ length direction

W‧‧‧Width direction

T‧‧‧thickness direction

S1‧‧‧ 胯 Xia District

S2‧‧‧Front side area

S3‧‧‧ rear side area

R‧‧‧Diffusion suppression area

FIG. 1 is a plan view of the absorbent article according to the embodiment when viewed from the muscle surface side.

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

Fig. 3 is a schematic diagram (cross-sectional view) for explaining a diffusion suppressing section according to the first embodiment.

Fig. 4 is a schematic diagram (plan view) for explaining a diffusion suppressing section of the first embodiment.

Fig. 5 is a schematic diagram (cross-sectional view) for explaining a diffusion suppressing section according to the second embodiment.

Claims (12)

An absorbent article having: Mutually orthogonal length direction, width direction and thickness direction, Absorbers, and A surface sheet disposed closer to the muscle surface side than the absorber, The surface sheet has an extending portion extending further outside than an outer edge of the absorbent body, The extension portion has a diffusion suppressing portion, The aforementioned surface sheet is a woven fabric or a knitted fabric. The absorbent article according to claim 1, wherein: The extension portion has a diffusion suppression region, and the diffusion suppression region includes a plurality of diffusion suppression regions arranged at intervals. The interval is 3 mm or less. The absorbent article according to claim 2, wherein: The plurality of diffusion suppression units include a plurality of first diffusion suppression units arranged at intervals in the arrangement direction, and a second diffusion suppression unit arranged at a staggered position in an orthogonal direction orthogonal to the arrangement direction. From a viewpoint along the orthogonal direction, the second diffusion suppression unit is disposed between the plurality of first diffusion suppression units. The absorbent article according to claim 3, wherein The distance between the plurality of first diffusion suppression portions and the second diffusion suppression portion in the orthogonal direction is 3 mm or less. The absorbent article according to any one of claims 2 to 4, wherein: The diffusion suppression region extends continuously in the width direction. The absorbent article according to any one of claims 2 to 4, wherein: The diffusion suppression region extends continuously along an outer edge of the surface sheet in a plan view in the thickness direction. The absorbent article according to any one of claims 1 to 4, wherein: The diffusion suppressing portion is composed of at least a pressing portion obtained by compressing the surface sheet in the thickness direction. The absorbent article according to any one of claims 1 to 4, wherein: The diffusion suppressing portion includes at least 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 threads constituting the woven fabric or the knitted fabric are made of refractory fibers. The absorbent article according to any one of claims 1 to 4, wherein: The surface sheet is the woven fabric or the knitted fabric having elasticity. The absorbent article according to any one of claims 1 to 4, wherein: The absorbent article has a back sheet, which is a liquid-impermeable film that is in contact with the extension portion, The diffusion suppressing portion is composed of at least a pressing portion obtained by compressing the front sheet and the back sheet in the thickness direction. In the pressing portion, a part of the back sheet is incorporated between fibers constituting the threads of the woven fabric or the knitted fabric. The absorbent article according to any one of claims 1 to 4, wherein: The absorbent article has a back sheet, which is a liquid-impermeable film that is in contact with the extension portion, The diffusion suppressing portion includes at least an opening portion penetrating the surface sheet in the thickness direction. A part of the back sheet is incorporated into the opening.