JP2020116153A - Absorbent article - Google Patents

Abstract

To provide an absorbent article having excellent absorbability of urine and the like.SOLUTION: An absorbent article 1 includes a liquid-permeable top sheet 2, a liquid-impermeable back sheet 3, and an absorber 11 provided therebetween. The absorber 11 includes: sealed portions 15 that have water absorbent resin arranged and pulp fiber not arranged between sheet members, the sheet members being joined together; and the non-sealed portions 16 that have the sheet members not joined together, and that have water absorbent resin arranged therein. The non-sealed portions 16 are arranged like stripes extending in a front-rear direction y. The top sheet 2 includes: embossed portions 7 formed like a quadrangle grid composed of a plurality of straight line portions 8 extending obliquely in one direction and another direction relative to the front-rear direction y; and non-embossed portions 9 surrounded by the embossed portions 7. The non-embossed portions 9 are provided so as to overlap the sealed portions 15, and the length of the non-embossed portions 9 in the front-rear direction y is longer than the length in the width direction x.SELECTED DRAWING: Figure 1

Description

The present invention relates to absorbent articles such as urine pads (including light incontinence pads), sanitary napkins, and disposable diapers.

BACKGROUND ART Conventionally, there is known an absorbent article including an absorbent body having a water-absorbent resin between sheet members and not a pulp fiber. For example, Patent Documents 1 to 4 disclose absorbent articles having such an absorber.

JP, 2000-238161, A JP, 2004-275225, A JP, 2009-061230, A JP, 2013-042882, A

Since the absorber configured to have the water absorbent resin between the sheet members and not the pulp fiber does not have the pulp fiber, it can be formed thin while ensuring the absorption capacity. On the other hand, since the absorbent body configured in this way does not have pulp fibers, the pull-in force for urine or the like may be insufficient, so it is desirable that it can quickly absorb urine or the like.

The present invention has been made in view of the above circumstances, and an object thereof is an absorbent article having an absorber configured to have a water-absorbent resin between sheet members and not having pulp fibers, wherein the urine To provide an absorbent article having excellent absorbency such as.

The absorbent article of the present invention capable of solving the above-mentioned problems has a front-rear direction and a width direction, and a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorption provided between them. An absorbent article having a body; the absorbent body having a plurality of layers of sheet members, the water absorbent resin being disposed between the sheet members, and the pulp fibers being not disposed; the absorbent body being a sheet member. It has a sealed portion where the sheet members are joined together and a non-sealed portion where the sheet members are not joined together, and a water absorbent resin is arranged in the non-sealed portion; The top sheet has a square lattice-shaped embossed portion composed of a plurality of straight line portions inclined in the front-back direction and extending in one direction and the other direction, and a non-embossed portion surrounded by the embossed portions. Having: The non-embossed portion is provided so as to overlap the sealing portion, and the non-embossed portion is characterized in that the length in the front-rear direction is longer than the length in the width direction.

In the absorbent article of the present invention, since the embossed portion is formed on the top sheet as described above, the diffusibility of urine or the like in the front-back direction is increased in the top sheet. Urine or the like diffused on the top sheet can quickly permeate the top sheet at the non-embossed portion. Urine or the like that has passed through the non-embossed portion of the top sheet diffuses in the front-rear direction at the sealing portion of the absorbent body, whereby the urine or the like is likely to be quickly absorbed by the absorbent body. Therefore, the absorbent article of the present invention has excellent absorbency for urine and the like.

The embossed portion is preferably provided in the entire region of the top sheet that overlaps the absorber. By providing the embossed portion in this manner, urine or the like is likely to diffuse over a wide area on the top sheet, and the entire absorbent body is likely to contribute to the absorption of urine or the like.

It is preferable that the top sheet is made of a short fiber non-woven fabric, and the constituent fibers of the non-woven fabric are oriented in the front-back direction. This makes it easier for urine and the like to preferentially diffuse on the top sheet in the front-back direction, and also secures the diffusibility in the width direction.

The length of the non-embossed portion in the front-rear direction is preferably 1.2 times or more and 4.0 times or less the length in the width direction. When the non-embossed portion is formed in this manner, urine or the like is likely to preferentially diffuse on the top sheet in the front-rear direction, and the diffusibility in the width direction is secured.

The length of the non-embossed portion in the width direction is preferably longer than the length of the sealed portion in the width direction. If the non-embossed portion is formed in this way, a part of the non-embossed portion will exist so as to overlap the non-sealing portion of the absorber. Therefore, urine or the like that has passed through the non-embossed portion of the top sheet is likely to be quickly absorbed by the water absorbent resin disposed in the non-sealed portion of the absorber. On the other hand, the length of the non-embossed portion in the width direction is preferably shorter than the length of the non-sealed portion in the width direction. As a result, the grid points of the square lattice-shaped embossed portions are present at positions overlapping with the non-sealed portion of the absorber, and the diffusibility of urine or the like in the region of the top sheet that overlaps with the non-sealed portion of the absorber is high. Increase. Therefore, although the non-sealing portion of the absorbent body has low diffusibility of urine or the like, the low diffusivity is compensated by the square lattice-shaped embossed portion of the top sheet. The length of the non-embossed portion in the width direction is preferably longer than the length of the sealed portion in the width direction and more preferably shorter than the length of the non-embossed portion in the width direction.

The embossed portion is preferably a hot embossed portion. If the embossed portion is formed by hot embossing, the diffusibility of urine or the like at the embossed portion can be further enhanced.

In the absorbent article of the present invention, urine or the like is easily diffused in the front-rear direction at the embossed portion of the top sheet, and urine or the like diffused on the top sheet can quickly permeate the top sheet at the non-embossed portion. Urine or the like that has passed through the non-embossed portion of the top sheet diffuses in the front-rear direction at the sealing portion of the absorbent body, whereby the urine or the like is likely to be quickly absorbed by the absorbent body. Therefore, the absorbent article of the present invention has excellent absorbency for urine and the like.

An example of the absorbent article of this invention is represented, and the top view which looked at the absorbent article from the skin surface side is represented. 2 shows a II-II sectional view of the absorbent article shown in FIG. 1. FIG. FIG. 3 is a cross-sectional view in the width direction of an absorber provided in the absorbent article shown in FIG. 2. FIG. 4 is a partially cutaway plan view of the absorber shown in FIG. 3 viewed from the skin surface side.

The absorbent article of the present invention will be described with reference to the drawings. The present invention is not limited to the embodiments shown in the drawings.

1 to 4 show a configuration example of a light incontinence pad as an example of the absorbent article of the present invention. FIG. 1 shows a plan view of an absorbent article (light incontinence pad) viewed from the top sheet side, FIG. 2 shows a II-II sectional view of the absorbent article shown in FIG. 1, and FIG. 2 shows a cross-sectional view in the width direction of the absorbent body included in the absorbent article shown in FIG. 2, and FIG. 4 shows a partially cutaway plan view of the absorbent body shown in FIG. 3 as seen from the skin surface side. In the drawings of the present application, the arrow x represents the width direction, the arrow y represents the front-rear direction, and the direction perpendicular to the surface formed by the arrows x and y represents the thickness direction z. In FIG. 1, the upper side of the drawing corresponds to the front side of the absorbent article, and the lower side of the drawing corresponds to the rear side of the absorbent article.

The absorbent article 1 has a top sheet 2, a back sheet 3, and an absorber 11 provided between them. The top sheet 2 is arranged on the skin side of the absorber 11, and the back sheet 3 is arranged on the non-skin side of the absorber 11. The excrement that has passed through the top sheet 2 is stored in the absorber 11. The back sheet 3 prevents excrement from leaking out.

The absorbent article 1 has a front-back direction y and a width direction x. The front-rear direction y corresponds to a direction extending in the front-rear direction of the crotch of the wearer when the absorbent article is worn. The width direction x means a direction that is on the same plane as the absorbent article and is orthogonal to the front-rear direction y, and corresponds to the left-right direction of the wearer when wearing the absorbent article. Further, when the wearer wears the absorbent article, the side facing the wearer's skin is the skin surface side, and the opposite side is the non-skin surface side.

The topsheet 2 is arranged on the skin side of the absorbent body 11 and is provided so as to face the wearer's skin when wearing the absorbent article. The top sheet 2 is preferably liquid permeable. Examples of the top sheet 2 include non-woven fabrics formed from hydrophilic fibers such as cellulose, rayon, and cotton; and hydrophobic materials such as polyolefins (eg polypropylene, polyethylene), polyesters (eg PET), polyamides (eg nylon), etc. It is possible to use a nonwoven fabric formed of a functional fiber, in which the surface of the hydrophobic fiber is made hydrophilic by a surfactant. Further, as the top sheet 2, woven cloth, knitted cloth, perforated plastic film or the like may be used.

The back sheet 3 is disposed on the non-skin surface side of the absorber 11 and is preferably liquid impermeable. As the back sheet 3, a non-woven fabric formed of hydrophobic fibers such as polyolefin (eg polypropylene, polyethylene), polyester (eg PET), polyamide (eg nylon), a plastic film or the like can be used. Further, as the back sheet 3, a laminated body of a non-woven fabric and a plastic film may be used.

The absorbent article 1 is preferably provided with side sheets 5 extending in the front-rear direction y on both sides of the top sheet 2 in the width direction x. The side sheet 5 is joined to both sides of the top sheet 2 in the width direction x. In FIGS. 1 and 2, three standing elastic members 6 are provided on each of the side sheets 5 on one side and the other side in the width direction x. When the absorbent article is used, the inner portion of the side sheet 5 rises toward the wearer's skin due to the contracting force of the elastic member 6 for standing up, whereby a rising flap is formed and side leakage of excrement such as urine is prevented. To be prevented. The side sheet 5 can be made of a liquid impermeable plastic film, a liquid impermeable nonwoven fabric, or the like, and a sheet material that can be used as the back sheet 3 can be used.

In the figure, a backing sheet 4 is provided between the back sheet 3 and the absorber 11, and the backing sheet 4 can improve the shape retention of the absorbent article 1. The mount 4 can be made of crepe paper or non-woven fabric. The mount 4 may not be provided.

When a non-woven fabric is used as the top sheet 2, the back sheet 3, and the side sheet 5, it is preferable to use a spun bond non-woven fabric, an air through non-woven fabric, a point bond non-woven fabric, a melt blown non-woven fabric, an SMS non-woven fabric, or the like.

Details of the absorber 11 will be described with reference to FIGS. 3 and 4. FIG. 3 shows a cross-sectional view of the absorbent body 11 in the width direction x, and FIG. 4 shows a partially cutaway plan view of the absorbent body 11 as seen from the skin surface side.

The absorbent body 11 has a plurality of layers of sheet members 12, the water absorbent resin 13 is arranged between the sheet members 12, and the pulp fibers are not arranged. That is, in the absorbent body 11, the sheet members 12 are arranged on the skin surface side and the non-skin surface side, respectively, and the water absorbent resin 13 is arranged between the sheet members 12, but between the sheet members 12. No pulp fibers are placed. It should be noted that the presence of pulp fibers, which are unavoidably mixed in the manufacturing process, is allowed between the sheet members 12. With such a configuration, the absorber 11 can be formed thin while having a high absorption capacity.

The shape (planar shape) of the absorber 11 is not particularly limited. Examples of the shape of the absorber 11 include a substantially rectangular shape, an hourglass shape, a gourd shape, and a battledore shape.

Examples of the water absorbent resin 13 include polyacrylic acid-based water absorbent resins such as sodium polyacrylate; starch-based resins such as starch-acrylonitrile graft copolymers, starch-acrylic acid graft copolymers and starch-acrylamide graft copolymers. Water-absorbent resin of polyvinyl alcohol-based water-absorbent resin such as cross-linked polyvinyl alcohol can be used. As the water-absorbent resin 13, it is preferable to use a polyacrylic acid-based water-absorbent resin such as sodium polyacrylate because it has a high liquid absorption amount.

The sheet member 12 is liquid-permeable, and includes, for example, a nonwoven fabric formed of hydrophilic fibers such as cellulose, rayon, and cotton, polyolefin (eg, polypropylene, polyethylene), polyester (eg, PET), polyamide (eg, nylon). ), etc., which is a non-woven fabric formed of hydrophobic fibers such that the surface of the hydrophobic fibers is hydrophilized with a surfactant. Further, as the sheet member 12, woven cloth, knitted cloth, perforated plastic film or the like may be used. Preferably, as the sheet member 12, a non-woven sheet member, that is, a non-woven sheet is used.

The sheet member 12 may be provided with a sheet member on the skin side and a sheet member on the non-skin side separately, and one sheet member is folded back, and one side folded back is the sheet member on the skin side, and the other side. The side may be a non-skin side sheet member.

The absorber 11 has a sealing portion 15 in which the sheet members 12 are joined together and a non-sealing portion 16 in which the sheet members 12 are not joined together, and the water-absorbent resin 13 is arranged in the non-sealing portion 16. There is. The sealing portion 15 is formed by joining the sheet members 12 together with an adhesive or by welding (heat sealing, ultrasonic welding, or the like). The non-sealing portion 16 is defined as a portion where the sheet members 12 are not joined to each other, and the portion other than the sealing portion 15 corresponds to the non-sealing portion 16. The absorbent body 11 may have the water-absorbent resin 13 disposed in the sealing portion 15 as well.

In FIG. 3, an adhesive is applied to the sheet member 12 to form the adhesive layer 14, and the water absorbent resin 13 is fixed to the sheet member 12 by the adhesive layer 14 in the non-sealing portion 16. The adhesive layer 14 may be provided on at least one of the sheet member 12 on the skin surface side and the sheet member 12 on the non-skin surface side, but preferably, the adhesive layer 14 is provided on both sheet members 12. At least a part of the water absorbent resin 13 may be fixed to the adhesive layer 14. If the water-absorbent resin 13 is fixed to the sheet member 12 with the adhesive layer 14, the water-absorbent resin 13 is less likely to move between the sheet members 12 before the water-absorbent resin 13 is absorbed, and the urine in the absorbent body 11 is absorbed. It becomes easier to secure the absorption capacity for Even after the water-absorbent resin 13 has been absorbed, the gelled water-absorbent resin 13 is less likely to move between the sheet members 12, and as a result, the water-absorbent resin 13 becomes lumps and makes the wearer less likely to feel uncomfortable.

The adhesive layer 14 preferably fixes the water absorbent resin 13 and does not inhibit water absorption or swelling by the water absorbent resin 13. In order to form such an adhesive layer 14, it is preferable that the adhesive layer 14 is formed by a curtain spray method, a spiral coating method, an omega coating method, a coater method or the like.

In the sealing portion 15, it is preferable that the joining of the sheet members 12 is maintained even if the water absorbent resin 13 absorbs water. As a result, even after the water absorbent resin 13 has absorbed water, the absorbent body 11 can easily secure the ability to absorb urine and the like. From this point of view, the sealing portion 15 is preferably formed by joining or welding the sheet members 12 together with an adhesive such as a rubber adhesive or a styrene elastomer.

In the absorber 11, the non-sealing portion 16 is provided in a stripe shape extending in the front-rear direction y. That is, at least two non-sealing portions 16 are provided so as to extend in the front-rear direction y. In this case, at least one sealing portion 15 is provided so as to be sandwiched between the non-sealing portions 16 in the width direction x and extend in the front-rear direction y. Preferably, the sealing portion 15 extending in the front-rear direction y is provided at each of one end and the other end of the absorbent body 11 in the width direction x. Therefore, it is preferable that the sealing portions 15 are also arranged in stripes extending in the front-rear direction y. The sealing portion 15 is preferably formed over the entire front-back direction y. If the absorbent body 11 is formed in this way, urine or the like is likely to diffuse in the front-rear direction y in the sealing portion 15, and the urine or the like that has passed through the top sheet 2 and reached the absorbent body 11 is on the absorbent body 11. Therefore, the urine and the like are easily diffused in the front-rear direction y, and the absorber 11 is easily absorbed by the absorber 11. It is preferable that three or more non-sealing portions 16 are provided side by side in the width direction x, and four or more non-sealing portions 16 are provided. It is preferable that four or more sealing portions 15 are provided side by side in the width direction x, and five or more sealing portions 15 are provided.

The length of each sealing portion 15 in the width direction x is preferably 1 mm or more, more preferably 2 mm or more, and preferably 10 mm or less, more preferably 8 mm or less. The length of each non-sealing portion 16 in the width direction x is preferably 5 mm or more, more preferably 8 mm or more, preferably 50 mm or less, more preferably 30 mm or less, and further preferably 20 mm or less. The ratio of the lengths of the sealed portion 15 and the non-sealed portion 16 in the width direction x is 5/95 as the length of the sealed portion 15 in the width direction x/the length of the non-sealed portion 16 in the width direction x. The above is preferable, 10/90 or more is more preferable, 15/85 or more is further preferable, 50/50 or less is preferable, and 60/40 or less is more preferable.

The amount of the water absorbent resin 13 arranged in the non-sealing portion 16 is not particularly limited, but is preferably 100 g/m ² or more, more preferably 150 g/m ² or more, and preferably 400 g/m ² or less, 385 g/m ² or less is more preferable. If the water-absorbent resin 13 is provided in the non-sealing portion 16 in an amount of 100 g/m ² or more, the absorption capacity of the absorber 11 can be easily increased. On the other hand, if the water-absorbent resin 13 is provided in the non-sealing portion 16 in an amount of 400 g/m ² or less, even if the water-absorbing resin 13 absorbs water, the joining of the sheet members 12 is maintained in the sealing portion 15. It is easy to be done.

As shown in FIG. 1, the top sheet 2 has embossed portions 7 in the form of a square lattice. The square lattice-shaped embossed portion 7 is composed of a plurality of straight line portions 8 that are inclined with respect to the front-rear direction y and extend in one direction and the other direction, and the top sheet 2 is pressed by the straight line portions 8. By forming the top sheet 2 in this manner, urine and the like are easily diffused on the top sheet 2. That is, since the topsheet 2 is compacted by the embossed portions 7, the diffusibility of the topsheet 2 such as urine in the plane direction is enhanced. On the other hand, the non-embossed portion 9 is formed on the top sheet 2 so as to be surrounded by the square lattice-shaped embossed portions 7, but the non-embossed portion 9 does not consolidate the top sheet 2 and permeates the top sheet 2 such as urine. Nature is secured. That is, urine or the like diffused in the plane direction of the topsheet 2 at the embossed portion 7 easily penetrates the topsheet 2 at the non-embossed portion 9. As described above, the urine and the like that have passed through the top sheet 2 are diffused in the absorbent body 11 by forming the sealing portion 15 in the absorbent body 11, and the urine and the like are quickly absorbed by the absorbent body 11. Is easily absorbed by. From the viewpoint of enhancing the diffusivity in the embossed portion 7 and the liquid permeability in the non-embossed portion 9, the top sheet 2 is preferably made of a nonwoven fabric.

The embossed portion 7 may be formed by pressing the top sheet 2 in a non-heated state, or may be formed by pressing the top sheet 2 in a heated state. In any case, the embossed portion 7 is preferably formed by pressing the top sheet 2 alone. From the viewpoint of enhancing the diffusibility of urine and the like in the embossed portion 7, the embossed portion 7 is preferably formed by being pressed in a heated state, that is, the embossed portion 7 is preferably a hot embossed portion. .. In this case, the top sheet 2 is preferably made of a non-woven fabric containing heat-fusible fibers. Further, it is preferable that at least a part of the constituent fibers of the non-woven fabric is melted in the hot embossed portion. Examples of the heat-fusible fiber include fibers made of a thermoplastic resin such as polyolefin (eg polypropylene, polyethylene), polyester (eg PET), polyamide (eg nylon) and the like.

The square lattice-shaped embossed portion 7 includes a plurality of straight line portions 8A (hereinafter, referred to as "first straight line portions") that are inclined with respect to the front-rear direction y and extend in one direction, and are inclined with respect to the front-rear direction y. It is formed by intersecting a plurality of linear portions 8B (hereinafter, referred to as "second linear portions") extending in the direction. It is preferable that a plurality of substantially diamond-shaped non-embossed portions 9 are formed on the topsheet 2 by the plurality of first linear portions 8A and the plurality of second linear portions 8B intersecting each other. The “substantial rhombus” includes not only a perfect rhombus but also a rhombus with rounded corners or a rhombus with cut corners. For example, when the top sheet 2 is embossed with a square grid pattern, the line width of the first straight line portion 8A and/or the second straight line portion 8B is not the same at the intersection of the first straight line portion 8A and the second straight line portion 8B. It may be thicker than the part. In such a case, the non-embossed portion 9 can be formed in a rhombus with rounded corners or a rhombus with cut corners. It is preferable that a plurality of substantially diamond-shaped non-embossed portions 9 be formed side by side in the width direction x and the front-rear direction y.

The first straight portion 8A is preferably inclined at an angle of 5° or more clockwise with respect to the front-rear direction y, more preferably 10° or more, further preferably 15° or more, and preferably 44° or less. , 35° or less is more preferable, and 30° or less is further preferable. The second straight portion 8B is preferably inclined at an angle of 5° or more counterclockwise with respect to the front-rear direction y, more preferably 10° or more, further preferably 15° or more, and 44° or less. It is preferably 35° or less, more preferably 30° or less. By thus providing the first straight line portion 8A and the second straight line portion 8B, urine and the like are more likely to diffuse on the top sheet 2 in the front-back direction y rather than in the width direction x.

It is preferable that the plurality of first straight line portions 8A are arranged at a substantially equal pitch inclining in one direction, and the plurality of second straight line portions 8B are arranged at a substantially equal pitch inclining in the other direction. The pitch lengths of the plurality of first straight line portions 8A and the pitch lengths of the plurality of second straight line portions 8B are preferably 3 mm or more, more preferably 4 mm or more, further preferably 5 mm or more, and preferably 15 mm or less, 12 mm or less. Is more preferable, and 10 mm or less is further preferable. The pitch length of the plurality of first straight line portions 8A (or the second straight line portions 8B) means the distance between the centers of the line widths of the adjacent first straight line portions 8A (or the second straight line portions 8B). The line width of the first straight portion 8A and the second straight portion 8B is preferably 0.5 mm or more, more preferably 0.8 mm or more, and preferably 2.5 mm or less, more preferably 2.0 mm or less. The pitch length of the plurality of first straight line portions 8A is preferably larger than the line width of the first straight line portion 8A. For example, the pitch length of the plurality of first straight line portions 8A is the same as that of the first straight line portion 8A. The line width is preferably 2 times or more, more preferably 3 times or more, preferably 20 times or less, more preferably 15 times or less, still more preferably 10 times or less. The pitch length of the plurality of second straight line portions 8B is preferably larger than the line width of the second straight line portion 8B. For example, the pitch length of the plurality of second straight line portions 8B is the line width of the second straight line portion 8B. 2 times or more, preferably 3 times or more, more preferably 20 times or less, more preferably 15 times or less, still more preferably 10 times or less.

The non-embossed portion 9 is formed such that the length in the front-rear direction y is longer than the length in the width direction x. Specifically, each non-embossed portion 9 surrounded by the square lattice-shaped embossed portion 7 is formed such that the length in the front-rear direction y is longer than the length in the width direction x. By forming the non-embossed portion 9 in this manner, urine and the like are easily diffused on the top sheet 2 in the front-rear direction y. The length of the non-embossed portion 9 in the front-rear direction y is preferably 1.2 times or more, more preferably 1.5 times or more, and preferably 4.0 times or less, the length in the width direction x. It is more preferably 0 times or less. When the non-embossed portion 9 is formed in this manner, urine or the like is likely to diffuse preferentially on the top sheet 2 in the front-rear direction y, and the diffusibility in the width direction x is secured.

The length of the non-embossed portion 9 in the front-rear direction y is, for example, preferably 5 mm or more, more preferably 7 mm or more, further preferably 10 mm or more, preferably 25 mm or less, more preferably 22 mm or less, still more preferably 20 mm or less. The length of the non-embossed portion 9 in the width direction x is, for example, preferably 3 mm or more, more preferably 4 mm or more, further preferably 5 mm or more, preferably 16 mm or less, more preferably 14 mm or less, further preferably 12 mm or less.

The non-embossed portion 9 is provided so as to overlap the sealing portion 15 of the absorber 11. If the non-embossed portion 9 is provided in this manner, urine or the like that has passed through the top sheet 2 is likely to be directly transferred to the sealing portion 15 of the absorbent body 11, and is more likely to diffuse in the front-rear direction y in the absorbent body 11.

The embossed portion 7 may be provided in at least a part of the region of the top sheet 2 that overlaps with the absorber 11, and is preferably provided in the entire region of the top sheet 2 that overlaps with the absorber 11. By providing the embossed portion 7 in this manner, urine or the like is likely to diffuse over a wide area on the top sheet 2, and the entire absorbent body 11 is likely to contribute to the absorption of urine or the like. The embossed portion 7 may be provided over the entire area of the top sheet 2.

The length of the non-embossed portion 9 in the width direction x is preferably longer than the length of the sealing portion 15 of the absorber 11 in the width direction x. Specifically, the length in the width direction x of each non-embossed portion 9 surrounded by the square lattice-shaped embossed portions 7 is preferably longer than the length in the width direction x of the sealing portion 15 of the absorber 11. If the non-embossed portion 9 is formed in this manner, the non-embossed portion 9 provided so as to overlap the sealing portion 15 does not entirely overlap the non-embossed portion 9 and the non-embossed portion 9 does not overlap. A part of the part 9 will overlap with the non-sealing part 16. Therefore, in any of the non-embossed portions 9 provided in the region overlapping with the absorbent body 11, the urine or the like that has permeated the non-embossed portion 9 is absorbed by the water absorbent resin 13 disposed in the non-sealed portion 16 of the absorbent body 11. It is easily absorbed quickly.

On the other hand, the length of the non-embossed portion 9 in the width direction x is preferably shorter than the length of the non-sealing portion 16 of the absorber 11 in the width direction x. Specifically, the length in the width direction x of each non-embossed portion 9 surrounded by the square lattice-shaped embossed portions 7 is preferably shorter than the length in the width direction x of the non-sealing portion 16 of the absorbent body 11. .. As a result, the lattice points of the square lattice-shaped embossed portions 7 are present at positions overlapping the non-sealing portion 16 of the absorbent body 11, and in the region overlapping the non-sealing portion 16 of the absorbent body 11 of the top sheet 2. Diffusivity of urine etc. increases. Therefore, although the non-sealing portion 16 of the absorbent body 11 has low diffusibility of urine or the like, the low diffusivity is compensated by the square lattice-shaped embossed portion 7 of the top sheet 2.

The length in the width direction x of the straight portion 8 of the embossed portion 7 is preferably shorter than the length of the sealing portion 15 of the absorber 11 in the width direction x. As a result, in the portion where the top sheet 2 overlaps the sealing portion 15 of the absorbent body 11, urine and the like from the top sheet 2 easily migrates to the sealing portion 15 over the entire front-rear direction y. The length in the width direction x of the straight line portion 8 of the embossed portion 7 means the length in the width direction x of the straight line portion 8 other than the intersection of the first straight line portion 8A and the second straight line portion 8B.

From the viewpoint of facilitating the diffusion of urine or the like in the front sheet 2 in the front-back direction y, it is preferable that the top sheet 2 is made of a non-woven fabric and the constituent fibers of the non-woven fabric are oriented in the front-back direction y. More preferably, the top sheet 2 is made of a short fiber nonwoven fabric, and the constituent fibers of the nonwoven fabric are oriented in the front-back direction y. This facilitates preferential diffusion of urine and the like on the top sheet 2 in the front-rear direction y, and also secures the diffusibility in the width direction x.

Examples of the non-woven fabric in which the constituent fibers are oriented in one direction include spun bond non-woven fabric, air-through non-woven fabric, and spun lace non-woven fabric. The orientation direction of the constituent fibers of the non-woven fabric can be confirmed by observing the surface of the non-woven fabric with a microscope or the like. For example, in a spunbond nonwoven fabric, the orientation direction of the constituent fibers will be described as follows. The spunbonded nonwoven fabric is obtained, for example, by melting a polymer raw material, extruding it from a spinneret, stretching it, and accumulating it on a conveyor belt or the like to form a web. The webs (fibers) accumulated in the are arranged along the traveling direction of the conveyor belt. Therefore, in this case, the web (fiber) is oriented along the traveling direction (MD direction) of the conveyor belt. In the air-through nonwoven fabric, when the nonwoven fabric is manufactured, the orientation directions of the constituent fibers can be aligned by appropriately setting the method of accumulating the raw material short fibers at the time of forming the fiber lump and the opening method at the time of forming the web. In the spunlaced nonwoven fabric, when the nonwoven fabric is formed, it is possible to align the orientation directions of the constituent fibers by controlling the flow of the water flow in which the short fibers are dispersed and depositing the fibers.

The top sheet 2 is preferably made of an air-through nonwoven fabric or a spunlace nonwoven fabric as the short fiber nonwoven fabric. Since spunlace nonwoven fabric and air-through nonwoven fabric can be formed with a relatively low bulk density, they have excellent permeability to urine and the like. Further, as described above, in the spunlace nonwoven fabric and the air-through nonwoven fabric, the constituent fibers of the nonwoven fabric are preferably oriented in the front-rear direction y, which can enhance the diffusibility in the front-rear direction y.

Although the absorbent article of the present invention has been described above with reference to the drawings, the absorbent article of the present invention is not limited to the light incontinence pad as shown in the drawings, and may be a disposable diaper or a sanitary napkin. ..

When the absorbent article is a disposable diaper, the disposable diaper is composed of, for example, a front abdomen, a back dorsum, and a crotch portion provided between them and provided with an absorbent body. The front abdomen corresponds to the part that is applied to the wearer's abdomen when the disposable diaper is worn, and the back back corresponds to the part that is applied to the wearer's back when the disposable diaper is worn. The crotch portion is located between the front abdomen and the back portion and corresponds to a portion that is applied to the wearer's crotch.

The disposable diaper may be a tape type disposable diaper or a pants type disposable diaper. The tape-type disposable diaper is configured, for example, by providing fastening members at both ends in the width direction of the back part, and by fastening the fastening members to the front abdomen, the pants-shaped disposable diaper can be formed. You can The pants-type disposable diaper has a pants shape having a waist opening and a pair of leg openings, and is formed into a pants shape before wearing.

When the absorbent article is a disposable diaper, the disposable diaper has, for example, a laminate in which an absorber is arranged between a top sheet and a back sheet, a front abdomen and a back back, and a crotch portion located between them. Is formed. The disposable diaper is also configured by providing an absorbent main body in which an absorbent body is arranged between a top sheet and a back sheet at a crotch portion of an exterior member having a front abdomen, a back back and a crotch located between them. You can also do it. In the latter case, a pants-type disposable diaper can be obtained by forming the exterior member in a pants shape. In any case, the absorbent article of the present invention can be obtained by configuring the top sheet or absorbent body of the absorbent article as described above.

1: Absorbent article 2: Top sheet 3: Back sheet 4: Mount sheet 5: Side sheet 6: Standing elastic member 7: Embossed portion 8: Straight portion, 8A: First straight portion, 8B: Second straight portion 9: Non-embossed portion 11: Absorber 12: Sheet member 13: Water absorbent resin 14: Adhesive layer 15: Sealed portion 16: Non-sealed portion

Claims (8)

An absorbent article having a front-back direction and a width direction, a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorber provided between them,
The absorber has a sheet member of a plurality of layers, the water-absorbent resin is arranged between the sheet members, pulp fibers are not arranged,
The absorbent body has a sealing portion in which sheet members are joined together, and a non-sealing portion in which sheet members are not joined together, and a water-absorbent resin is arranged in the non-sealing portion,
The non-sealing portion is provided in a stripe shape extending in the front-rear direction,
The top sheet has a square lattice-shaped embossed portion composed of a plurality of straight line portions inclined in the front-rear direction and extending in one direction and the other direction, and a non-embossed portion surrounded by the embossed portions. ,
The non-embossed portion is provided so as to overlap the sealing portion, and the non-embossed portion has a length in the front-rear direction longer than a length in the width direction. The absorbent article according to claim 1, wherein the embossed portion is provided on an entire region of the top sheet that overlaps with the absorber. The absorbent article according to claim 1 or 2, wherein the top sheet is made of a short fiber nonwoven fabric, and constituent fibers of the nonwoven fabric are oriented in the front-rear direction. The absorbent article according to claim 1, wherein the length of the non-embossed portion in the front-rear direction is 1.2 times or more and 4.0 times or less the length in the width direction. The absorbent article according to any one of claims 1 to 4, wherein a length of the non-embossed portion in the width direction is longer than a length of the sealed portion in the width direction. The absorbent article according to any one of claims 1 to 5, wherein a length in the width direction of the non-embossed portion is shorter than a length in the width direction of the non-sealed portion. The width in the width direction of the non-embossed portion is longer than the length in the width direction of the sealing portion, and is shorter than the length in the width direction of the non-sealed portion. Absorbent article. The absorbent article according to any one of claims 1 to 7, wherein the embossed portion is a hot embossed portion.

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