JP2019115597A - Absorbent article - Google Patents

Abstract

To provide an absorbent article that can suppress body fluid diffusion with an extension part of a surface sheet which extends on an outer side more than an outer edge of an absorber.SOLUTION: An absorbent article 1 includes: a longitudinal direction L, a width direction W and a thickness direction which are orthogonal to one another; an absorber 10; and a surface sheet 20 disposed on a skin surface side more than the absorber. The surface sheet has an extension part 22 extending on an outer side more than an outer edge of the absorber. The extension part has a diffusion suppression part 25. The surface sheet is a fabric or knit.SELECTED DRAWING: Figure 1

Description

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

  Patent Document 1 discloses an absorbent article comprising an absorbent body, and a surface sheet disposed on the skin surface side of the absorbent body and made of a non-woven fabric. The nonwoven fabric has liquid permeability, so the body fluid of the wearer passes through the top sheet and is absorbed by the absorber.

JP, 2013-85831, A

  A sealed portion is formed by heat-sealing the extended portion of the top sheet extending outward with respect to the outer edge of the absorber and the extended portion of the back sheet by embossing so that the absorber does not go outside. It is done. Since the seal portion is compressed in the thickness direction by embossing, the density is higher than the periphery of the seal portion. For this reason, the body fluid diffuses from low density to high density by capillary action. Since the extension of the surface sheet does not overlap the absorber, the body fluid is difficult to be absorbed by the absorber at the extension. Therefore, the body fluid diffused in the extension part of the surface sheet is easy to touch the skin, and the wearer may feel uncomfortable.

  Then, the absorptive article which can control fluid diffusion in the extension part of the surface sheet which extends outside rather than the outer edge of an absorber is desired.

  An absorbent article according to one aspect is an absorbent article having a longitudinal direction, a width direction, and a thickness direction orthogonal to one another, an absorbent body, and a surface sheet disposed on the skin surface side of the absorbent body. The surface sheet has an extending portion extending outward beyond the outer edge of the absorber, the extending portion has a diffusion suppressing portion, and the surface sheet is a woven or knitted fabric .

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

(1) Outline of Embodiment At least the following matters will become clear by the description of the present specification and the attached drawings.

  An absorbent article according to one aspect is an absorbent article having a longitudinal direction, a width direction, and a thickness direction orthogonal to one another, an absorbent body, and a surface sheet disposed on the skin surface side of the absorbent body. The surface sheet has an extending portion extending outward beyond the outer edge of the absorber, the extending portion has a diffusion suppressing portion, and the surface sheet is a woven or knitted fabric .

  When processing the extension portion of the surface sheet to form the diffusion suppression portion, a force is applied to the processing portion (diffusion suppression portion) of the extension portion. This increases the density of the processing location and its periphery. In the absorbent article of the present application, since the surface sheet is a woven or knitted fabric, the surface sheet is composed of yarns. The yarn at the processing location and the periphery thereof and the yarn at the remaining unprocessed portion of the top sheet (for example, the portion disposed on the skin surface side of the absorber) are continuously connected. For this reason, even if the yarn at the processing location and the periphery thereof is temporarily pulled to the processing location by the force at the time of processing the extension portion, the yarn at the processing location and the periphery thereof is pulled back from the unprocessed region. Therefore, even if the fibers constituting the yarn are concentrated at the time of processing at and around the processing point, the concentration of fibers is alleviated after processing. On the other hand, when the surface sheet is a non-woven fabric, the fibers in the non-processed portion and the fibers in the non-processed portion are not always connected because the fibers are not uniform in the direction of arrangement of the fibers constituting the non-woven fabric. . Furthermore, when a force is applied by processing, the fibers at the processing location and the periphery thereof are strongly entangled, and the fibers at the processing location and the periphery thereof are unlikely to be pulled back from the unprocessed portion. Therefore, the fibers remain concentrated after processing at and around the processing point.

  As described above, in the absorbent article of the present application, the concentration of fibers at the processing location (the diffusion suppressing portion) and the periphery thereof is alleviated after processing, so the diffusion suppressing portion and the periphery thereof are compared to the surface sheet of the nonwoven fabric. The density of For this reason, since the difference between the density of the diffusion suppressing portion and the periphery thereof and the density of the unprocessed portion is small, it is possible to suppress the body fluid diffusion (body fluid diffusion due to the difference in density) from the low density to the high density by capillary action. .

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

  In the diffusion suppression region, the diffusion suppression portions are arranged at close intervals, so in the diffusion suppression region, the diffusion of the body fluid is suppressed by at least one of the plurality of diffusion suppression portions, and the body fluid is widely diffused. Can be suppressed.

  According to a preferable aspect, the plurality of diffusion suppressing portions are arranged at positions shifted in the orthogonal direction orthogonal to the arranging direction with the plurality of first diffusion suppressing portions arranged at intervals in the arranging direction. And a second diffusion suppression unit. In the viewpoint along the orthogonal direction, the second diffusion suppression unit may be disposed between the plurality of first diffusion suppression units.

  Since the second diffusion suppressing portion is positioned in the diffusion direction (that is, the orthogonal direction) of the body fluid diffused through the space between the first diffusion suppressing portions, the diffusion of the body fluid is suppressed.

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

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

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

  Since the diffusion suppression region extends continuously in the width direction, the possibility that the diffusion suppressing portion may block the body fluid diffused in the longitudinal direction can be increased.

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

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

  According to a preferred aspect, the diffusion suppressing portion may be at least constituted by a squeezing portion in which the surface sheet is compressed in the thickness direction.

  Even if the pressing part and its surrounding threads are temporarily pulled to the processing location by the force at the time of processing the extension part for forming the pressing part, the pressing part and its surrounding thread are from the unprocessed part It is pulled back. Therefore, even if the fibers constituting the yarn are concentrated at the time of processing in the pressing portion and its periphery, the concentration of fibers is alleviated after processing. As a result, the density of the compressed part and its periphery becomes lower compared to the surface sheet of the non-woven fabric, so the difference between the density of the compressed part and its periphery and the density of the unprocessed part becomes smaller, and body fluid diffusion due to the density difference. Can be suppressed.

  According to a preferable aspect, the diffusion suppressing portion may be at least constituted by an opening which penetrates the surface sheet in the thickness direction.

  The force at the time of processing the extension to form the opening causes the yarn around the opening to pull back from the unworked portion, even if the yarn around the opening is temporarily pulled to the processing location Be Therefore, even if the fibers constituting the yarn concentrate at the time of processing around the opening, the concentration of fibers is alleviated after processing. As a result, the density in the vicinity of the opening becomes lower compared to the surface sheet of the non-woven fabric, so the difference between the density in the vicinity of the opening and the density of the unprocessed portion becomes smaller, and body fluid diffusion due to the difference in density is suppressed. it can.

  According to a preferred embodiment, the yarn constituting the woven fabric or the knitted fabric may be constituted by non-fusion fibers.

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

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

  In the case where the diffusion suppressing portion is constituted by the pressing portion, the force by which the pressing portion and the yarn in the periphery thereof are pulled back from the unprocessed portion is further increased by the expansion or contraction of the surface sheet which is a woven or knitted fabric. And the concentration of fibers constituting the yarn can be further alleviated in the periphery thereof. As a result, since the difference between the density of the compressed portion and its periphery and the density of the unprocessed portion can be further reduced, the diffusion of the body fluid due to the difference in density can be further suppressed. In addition, when the diffusion suppressing portion is configured by the opening, the expansion and contraction of the surface sheet further increases the force by which the yarn around the opening is pulled back from the unprocessed portion, and thus the opening expands. As a result, since the contact of the fiber which comprises a thread | yarn can be suppressed further, the bodily fluid diffusion by transmitting a fiber can be suppressed.

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

  Since a part of the back sheet which is a liquid impermeable sheet is intruded between the fibers constituting the yarn in the pressing part, the diffusion of the body fluid is blocked by a part of the back sheet which is in between the fibers, Diffusion is suppressed.

  According to a preferred aspect, the absorbent article may have a back sheet that is in contact with the extension and is a liquid impermeable film. The diffusion suppressing portion may be at least constituted by an opening which penetrates 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 impervious film has entered the opening, the part of the back sheet entering the opening blocks the diffusion of the bodily fluid and suppresses the diffusion of the bodily fluid.

(2) Schematic Configuration of Absorbent Article Hereinafter, with reference to the drawings, in the following description of the drawings, the same or similar parts are given the same or similar reference numerals. However, it should be noted that the drawings are schematic, and the ratio of each dimension is different from the actual one. Therefore, specific dimensions and the like should be determined in consideration of the following description. In addition, parts having different dimensional relationships and proportions may be included between the drawings.

  FIG. 1 is a plan view of the absorbent article according to the embodiment viewed from the skin surface side. FIG. 2 is a cross-sectional view taken along the line AA shown in FIG.

  The absorbent article 1 has a longitudinal direction L, a width direction W, and a thickness direction T orthogonal to each other. The "skin side" corresponds to the side facing the wearer's skin during use. The "non-skin side" corresponds to the side that is turned against the skin of the wearer during use.

  Absorbent article 1 has crotch area S1, front side area S2, and back side area S3. The crotch region S1 is a region facing the wearer's excretion opening, for example, a vaginal opening. When the absorbent article 1 is attached to the undergarment, the crotch area S1 is an area which is disposed in the crotch of the undergarment and is disposed between the legs of the wearer. The front side area S2 is located on the front side of the crotch area S1. The rear area S3 is located rearward of the crotch area S1.

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

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

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

  Textiles and knits are made from twisted yarns by bundling a large number of fibers. Textiles are constructed by weaving yarns. For example, the surface sheet 20 may be a woven fabric of plain weave, twill weave, or satin weave. A knitted fabric is constructed by knitting a yarn. For example, the surface sheet 20 may be a knitted fabric knitted with any of a plywood, a tricot, a milling cutter, a deer, a honeycomb mesh, a cardboard knit, and a fleece. The arrangement of fibers constituting the woven fabric and the knitted fabric is arranged along the yarn length direction. The yarn constituting the woven or knitted fabric may be constituted by non-fusion fibers. Non-fusion fibers are, for example, cotton, rayon, cellulose, silk and the like.

  The non-woven fabric is a three-dimensional fiber assembly in which fibers dispersed independently for each fiber are formed by adhesion with adhesive or heat, or mechanical entanglement. The arrangement of fibers constituting the non-woven fabric is random.

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

  The back sheet 30 is disposed on the non-skin surface side of the absorber 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 beyond the outer edge of the absorber 10 contacts the extension 22.

  The side sheets 40 are disposed outside in the width direction W. The side sheet 40 covers the outer edge (the outer end in the width direction W) of the top sheet 20. In order to prevent the menstrual blood from flowing over the side sheet 40 and flowing outward of the absorbent article 1, the side sheet 40 preferably has hydrophobicity or water repellency.

(3) Diffusion suppression unit 25
FIG. 3 is a schematic view (cross-sectional view) for explaining the diffusion suppressing portion 25. As shown in FIG. Specifically, it is a cross-sectional view of the diffusion suppressing portion 25 in the longitudinal direction L and the thickness direction T. FIG. 4 is a schematic view (plan view) for explaining the diffusion suppressing portion 25. As shown in FIG. It is a top view of diffusion control part 25 seen from the skin side (thickness direction T).

  As shown in FIG. 3, in the present embodiment, the diffusion suppressing portion 25 is configured by a pressing portion 25A in which the top sheet 20 is compressed in the thickness direction T. The pressing portion 25A may be formed, for example, by compressing the surface sheet 20 in the thickness direction T by embossing using a circular pin. The pressing portion 25A (the diffusion suppressing portion 25) may be circular in a 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 yarn of the pressing portion 25A and the peripheral portion 251 which is the periphery thereof and the yarn of the unprocessed unprocessed portion 252 of the other surface sheet. Are connected continuously. For this reason, even if the yarn of the pressing portion 25A and the peripheral portion 251 is temporarily pulled to the processing location by the force at the time of processing the extension portion 22 for forming the pressing portion 25A, the pressing portion 25A and the peripheral portion The yarn of the part 251 is pulled back from the unprocessed part 252. Therefore, even if the fibers constituting the yarn are concentrated in the pressing portion 25A and the peripheral portion 251, the concentration of the fibers is alleviated after the processing. Thereby, the density of pressing part 25A and peripheral part 251 becomes low compared with the surface sheet of a nonwoven fabric. In particular, the density of the peripheral portion 251 does not differ much from the density of the unprocessed portion 252. Since the difference between the density of the pressed portion 25A and the peripheral portion 251 and the density of the unprocessed portion 252 is reduced, it is possible to suppress the body fluid diffusion (diffusion in the direction of arrow M) due to the difference in density.

  In addition, the density of the pressed portion 25A is larger than the density of the unprocessed portion 252. The speed of diffusion from the pressing part 25A with high density to the raw part 252 with low density (speed of spreading in the direction of arrow P) is greater than the speed of spreading in the green part 252 (speed of spreading in the direction of arrow Q). Since the extension part 22 has the compression part 25A as the diffusion suppressing part 25 because it is slow, it is possible to suppress the body fluid diffusion in the extension part 22.

  As shown in FIGS. 1 and 4, in the diffusion suppression region R, there are a plurality of diffusion suppression portions 25 (diffusion suppression portions 25A1) arranged with an interval a1. The space a1 is 3 mm or less. In the diffusion suppression region R, since the diffusion suppression portions 25 are arranged at a close interval a1, in the diffusion suppression region R, the diffusion suppression portion 25 of at least one of the plurality of diffusion suppression portions 25 diffuses the bodily fluid. Be suppressed. As a result, it can suppress that a bodily fluid spreads widely.

  In addition, the plurality of diffusion suppression units 25 are arranged at positions shifted in the orthogonal direction orthogonal to the arrangement direction with the plurality of first diffusion suppression units 25A1 arranged at an interval a1 in the arrangement direction, and the second diffusion suppression And a unit 25A2. In the viewpoint along the orthogonal direction, the second diffusion suppressing unit 25A2 is disposed between the plurality of first diffusion suppressing units 25A1. As a result, the second diffusion suppressing portion 25A2 is positioned in the diffusion direction (that is, the orthogonal direction) of the body fluid diffused through the space between the first diffusion suppressing portions 25A1, so that the diffusion of the body fluid is suppressed.

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

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

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

  The diffusion suppressing portion 25 may be at least constituted by 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 pressing portion 25A, a part of the back sheet 30 may enter between the fibers of the yarn constituting 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 melts, so that a part of the back sheet 30 intervenes between the fibers of the yarn of the top sheet 20. It is also good. Thereby, the diffusion of the body fluid is blocked by a part of the back sheet 30 which has entered between the fibers, and the diffusion of the body fluid is suppressed.

  In addition, when the thread which comprises the surface sheet 20 is non-fusion | fusion fiber, even if it has heat processing at the time of manufacture of an absorbent article, generation | occurrence | production of a fusion | fusion part with high density can be suppressed in the surface sheet 20. As a result, the diffusion of body fluid due to the difference in density can be suppressed.

  When the surface sheet 20 is a woven or knitted fabric having stretchability, the force by which the yarn of the pressed portion 25A and the peripheral portion 251 is pulled back from the unprocessed portion 252 is further extended by the expansion or contraction of the surface sheet 20 which is a woven or knitted fabric. As it becomes larger, concentration of fibers constituting the yarn in the pressing portion 25A and the peripheral portion 251 can be further alleviated. As a result, since 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, the diffusion of the body fluid due to the difference in density can be further suppressed.

(4) Second Embodiment An absorbent article 1 according to a second embodiment will be described. FIG. 5 is a schematic view of the diffusion suppressing portion 25 for describing the absorbent article 1 according to the second embodiment.

  The diffusion suppressing portion 25 is at least constituted by an opening 25 </ b> B which penetrates the surface sheet 20 in the thickness direction T. The opening 25B may be formed, for example, by compressing the top sheet 20 in the thickness direction T by embossing. The opening 25B may be formed, for example, by processing with a cutter such as a cutter.

  Since the surface sheet 20 which is a woven or 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 unprocessed portion 252 of the other surface sheet are , Are connected continuously. For this reason, even if the yarn of the peripheral part 251 is temporarily pulled to the processing location by the force at the time of processing the extension part 22 for forming the opening 25B, the yarn of the peripheral part 251 is not processed yet It is pulled back from 252. Therefore, in the peripheral portion 251, even if the fibers constituting the yarn are concentrated during processing, the concentration of fibers is alleviated after processing. The density of the peripheral portion 251 does not differ much from the density of the unprocessed portion 252. As a result, the density of the peripheral portion 251 is lower than that of the non-woven surface sheet, so that the difference between the density of the peripheral portion 251 and the density of the unprocessed portion 252 is small, and body fluid diffusion due to the density difference can be suppressed. .

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

  A part of the back sheet 30 may enter the opening 25B. For example, when forming the opening 25B together in the top sheet 20 and the back sheet 30, a part of the back sheet 30 may enter the opening 25B by cutting a part of the back sheet 30. Thereby, the diffusion of the body fluid is blocked by a part of the back sheet 30 which has entered the opening 25B, and the diffusion of the body fluid can be suppressed.

  When the surface sheet 20 is a stretchable fabric or a knitted fabric, the expansion and contraction of the surface sheet 20 further increases the force by which the yarn of the peripheral portion 251 is pulled back from the unprocessed portion 252, so the opening 25B spreads. . As a result, since the contact of the fiber which comprises a thread | yarn can be suppressed further, the bodily fluid diffusion by transmitting a fiber can be suppressed.

(5) Other embodiments In each embodiment mentioned above, although pressing part 25A and opening 25B were circle-like in plane view, it is not restricted to this. For example, the pressing 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 body fluid diffused in the longitudinal direction L may be blocked by the diffusion suppressing portion 25 can be increased.

  In the embodiments described above, the distance a1 may be 0.5 mm or more. The distance a2 may be 0.5 mm or more. As a result, in the region between the diffusion suppressing portions 25, a region capable of absorbing the body fluid can be secured, so that the leakage of the body fluid can be suppressed.

  Although the absorbent article of the present embodiment has been described by taking a sanitary napkin as an example, the present invention is not limited to this. The present invention may be applied to other absorbent articles (eg, panty liners, breast milk pads, adult incontinence pads, fecal pads or sweat sheets, etc.). In the present invention, in particular, the absorbent article may be applied to an article used by being attached to the inside of a wearing article such as a user's underwear.

  Although the present invention has been described above in detail using the above embodiments, it is obvious for those skilled in the art that the present invention is not limited to the embodiments described herein. The present invention can be embodied as modifications and alterations without departing from the spirit and scope of the present invention defined by the description of the claims. Accordingly, the description in the present specification is for the purpose of illustration and does not have any limiting meaning on the present invention.

(6) Comparative evaluation The comparative evaluation of suppression of body fluid diffusion will be described. Specifically, first, in each example and each comparative example, the pressed portion (embossed portion) was formed by compressing the top sheet and the back sheet in the thickness direction T. Menstrual blood was dropped at a position 20 mm apart in the longitudinal direction L from the boundary between the embossed portion and the non-embossed portion. Specifically, 1 ml of menstrual blood was dropped in 5 seconds, and a cycle of leaving for 5 seconds was repeated four times. After 30 minutes, the diffusion length of menstrual blood in the longitudinal direction was measured.

  In Examples 1 and 2, the surface sheet is knitted with plywood and the basis weight is 100 gsm. In Example 1, a pressing part and a plurality of openings are formed as the diffusion suppressing part. In Example 2, a squeezed portion is formed as the diffusion suppressing portion.

  In Examples 3 and 4, the topsheet is tricot knitted and has a basis weight of 100 gsm. In the third embodiment, a squeezed portion and a plurality of openings are formed as the diffusion suppressing portion. In Example 4, a squeezed portion is formed as the diffusion suppressing portion.

  In Comparative Examples 1 and 2, the surface sheet is a non-woven fabric (Cotton SL), and the basis weight is 105 gsm. In the comparative example 1, the pressing part and the some opening part are formed as a diffusion suppression part. In Comparative Example 2, a squeezed portion is formed as the diffusion suppressing portion.

  In Comparative Examples 3 and 4, the surface sheet is a non-woven fabric (MVF 30), and the basis weight is 90 gsm. In Comparative Example 3, a pressing portion and a plurality of openings are formed as the diffusion suppressing portion. In Comparative Example 4, a squeezed portion is formed as the diffusion suppressing portion.

  In each of the examples and the comparative examples, the basis weight of the absorber is 300 gsm. The basis weight of the back sheet is 23.5 gsm.

  As shown in Table 1, it can be seen that the absorbent articles according to Example 1-4 have a shorter diffusion length than the absorbent articles according to Comparative Example 1-4. In Comparative Example 1-4, although menstrual blood is diffused even when reaching the diffusion suppressing portion, in Example 1-4, the diffusion of menstrual blood reaching the diffusion suppressing portion is suppressed.

  Moreover, when the diffusion length was measured on the same conditions using what is a textile by a surface sheet, it has confirmed that spreading | diffusion of a bodily fluid could be suppressed similarly to Example 1-4.

  As described above, it was found that the absorbent article according to the present invention can suppress the diffusion of body fluid.

  Although the present invention has been described above in detail using the above embodiments, it is obvious for those skilled in the art that the present invention is not limited to the embodiments described herein. The present invention can be embodied as modifications and alterations without departing from the spirit and scope of the present invention defined by the description of the claims. Accordingly, the description in the present specification is for the purpose of illustration and does not have any limiting meaning on the present invention.

  According to the said aspect, the absorbent article which can suppress a bodily fluid diffusion can be provided in the extension part of the surface sheet extended outside rather than the outer edge of an absorber.

DESCRIPTION OF SYMBOLS 1: Absorbent article 10: Absorbent body 20: Surface sheet 22: Extension part 25A: Pressed part 25A1: 1st diffusion suppression part 25A2: 2nd diffusion suppression part 25B: Opening 251: Peripheral part 252: Raw part 30 A: back sheet 40: side sheet L: longitudinal direction W: width direction T: thickness direction S1: crotch area S2: front side area S3: rear side area

Claims (12)

Longitudinal direction, width direction, and thickness direction orthogonal to each other;
An absorber,
An absorbent article comprising: a surface sheet disposed on the skin surface side of the absorbent body;
The surface sheet has an extension which extends outward beyond the outer edge of the absorber;
The extension portion has a diffusion suppression portion,
The absorbent article, wherein the surface sheet is a woven or knitted fabric. The extension portion has a diffusion suppression region in which a plurality of diffusion suppression portions arranged at intervals are present,
The absorbent article according to claim 1, wherein the distance is 3 mm or less. The plurality of diffusion suppression units includes a plurality of first diffusion suppression units arranged at intervals in the arrangement direction, and a second diffusion suppression unit arranged at a position shifted in the orthogonal direction orthogonal to the arrangement direction. Have
The absorbent article according to claim 2, wherein the second diffusion suppressing portion is disposed between the plurality of first diffusion suppressing portions in the viewpoint along the orthogonal direction.   The absorptive article according to claim 3 whose distance in said perpendicular direction of said a plurality of 1st diffusion control parts and said 2nd diffusion control parts is 3 mm or less.   The absorbent article according to any one of claims 2 to 4, wherein the diffusion suppression area extends continuously in the width direction.   The absorbent article according to any one of claims 2 to 4, wherein the diffusion suppression area extends continuously along the 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 6, wherein the diffusion suppressing portion is at least constituted by a pressing portion in which the surface sheet is compressed in the thickness direction.   The absorbent article according to any one of claims 1 to 7, wherein the diffusion suppressing portion is at least constituted by an opening which penetrates the surface sheet in the thickness direction.   The absorbent article according to any one of claims 1 to 8, wherein the yarn constituting the woven fabric or the knitted fabric is constituted by non-fusion fibers.   The absorbent article according to any one of claims 1 to 9, wherein the surface sheet is the woven or knitted fabric having stretchability. The absorbent article has a back sheet which is in contact with the extension and is a liquid impermeable film.
The diffusion suppressing portion is at least constituted by a pressing portion in which the top sheet and the back sheet are compressed in the thickness direction,
The absorbent article according to any one of claims 1 to 10, wherein a part of the back sheet is interspersed between fibers of the yarn forming the woven fabric or the knitted fabric in the squeezing portion. The absorbent article has a back sheet which is in contact with the extension and is a liquid impermeable film.
The diffusion suppressing portion is at least constituted by an opening penetrating the surface sheet in the thickness direction,
The absorbent article according to any one of claims 1 to 11, wherein a part of the back sheet penetrates the opening.

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