JP2020116154A - Absorbent article - Google Patents

Abstract

To provide an absorbent article capable of preventing ends in a front-rear direction where no absorber exists from being bent.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 top sheet 2 and the back sheet 3 extend farther to a front side and to a rear side than the absorber 11, and an absorber non-existing portion 10 is formed in the front side and in the rear side of the absorber 11. 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. Embossed portions 7 are provided at least in the absorber non-existing portions 10 of the top sheet 2. The line width of the straight line portions 8 that form the embossed portions 7 is larger than the length in the thickness direction of the absorber non-existing portions 10 of the absorbent article 1.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.

Conventionally, various absorbent articles such as urine pads, sanitary napkins, and disposable diapers are known. It is desirable that these absorbent articles be formed thin so that the crotch of the wearer does not become bulky when worn. On the other hand, a thin absorbent article may be difficult to spread in a flat shape when set in the crotch of a wearer or may be bent during use. For example, in Patent Document 1, a plurality of embosses formed of a non-woven fabric in which fibers are oriented in one direction and extending orthogonally to the fiber orientation direction of the non-woven fabric are used as an absorbent article that suppresses the occurrence of twist when worn. Disclosed is an absorbent article having a top sheet provided with lines, each embossed line being formed by a plurality of recesses provided intermittently, and arranged such that the longitudinal direction of the recesses intersects the fiber orientation direction. ing.

JP, 2007-117111, A

Since the absorbent article is particularly thinly formed in the portion in the front-rear direction where the absorber does not exist, the absorbent article is easily bent at that portion. The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an absorbent article that is less likely to be bent at the front-rear end portion where the absorber does not exist.

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; a topsheet and a backsheet extend forward and rearward of the absorber, and absorber-absent portions are formed on the front and rear sides of the absorber; topsheet 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; the embossed portion is provided at least in the absorber-absent portion of the top sheet. The feature is that the line width of the straight line portion forming the embossed portion is larger than the length in the thickness direction of the absorber non-existing portion of the absorbent article. In the absorbent article of the present invention, a mount is further provided between the absorber and the backsheet; the topsheet, the backsheet and the mount extend to the front side and the rear side of the absorber, and the front side of the absorber and The absorber non-existing portion is formed on the rear side; the line width of the straight portion forming the embossed portion may be larger than the length in the thickness direction of the absorber non-existing portion of the absorbent article.

The end in the front-rear direction of the absorbent article has a low rigidity due to the absence of an absorber, but the absorbent article of the present invention has an embossed portion provided in the absorber-absent portion of the top sheet, thereby absorbing the absorbent article. The rigidity of the absorbent article non-existing portion at the front and rear ends of the absorbent article is increased, and the absorbent article is less likely to bend in the absorbent article non-existing portion. At this time, since the embossed portion is provided in the shape of a square lattice composed of a plurality of straight portions that are inclined with respect to the front-rear direction and extend in one direction and the other direction, the embossed portion extends in the width direction in the absorber non-existing portion. The absorbent article is less likely to bend so that a fold is formed. Further, since the line width of the straight line portion forming the embossed portion is formed to be larger than the length in the thickness direction of the absorbent body non-existing portion of the absorbent article, the plane direction in the absorbent body non-existing portion of the absorbent article. Increases the rigidity of.

It is preferable that the straight line portion forming the embossed portion is provided inclining clockwise or counterclockwise with respect to the front-rear direction at an angle of 5° or more and 44° or less, and clockwise or counterclockwise with respect to the front-rear direction. More preferably, it is provided so as to be inclined clockwise at an angle of 15° or more and 30° or less. By providing the straight portion in this manner, the non-absorbent portion of the absorbent article is less likely to bend in the front-back direction.

The embossed portion is provided in a region overlapping with the absorber of the top sheet, and the line width of the straight portion forming the embossed portion is preferably smaller than the length in the thickness direction of the portion of the absorbent article where the absorber is provided. .. When the embossed portion is formed in this way, the diffusibility of urine or the like on the top sheet does not become excessively high, and the absorption capacity of the absorbent body is easily secured.

The absorber has a water absorbent resin between the sheet members and is configured not to have pulp fibers, and has a sealed portion in which the sheet members are joined and a non-sealed portion in which the sheet members are not joined. It is preferable that the 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, and the embossed portion is provided in a portion overlapping with the sealing portion of the top sheet. In the absorbent article provided with the absorber configured as described above, the absorbent article is easily bent along the extending direction of the sealing portion. Therefore, in order to prevent the absorbent article from bending in the sealing portion, it is preferable that the embossed portion is formed in a portion of the top sheet that overlaps the sealing portion. As a result, the rigidity of the top sheet is increased in the portion overlapping the sealing portion, and the absorbent article is less likely to bend in the sealing portion. The line width of the straight line portion forming the embossed portion is preferably smaller than the length in the thickness direction of the portion overlapping the sealing portion of the absorbent article, whereby the rigidity in the plane direction of the absorbent article is easily ensured. Become.

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. As a result, the non-absorbent portion of the absorbent article is less likely to bend in the front-back direction. In addition, urine and the like tend to diffuse preferentially in the front-rear direction on the top sheet, and the diffusibility in the width direction is secured.

The embossed portion is preferably a hot embossed portion. This can increase the rigidity of the embossed portion of the top sheet.

The absorbent article of the present invention is provided with an embossed portion in the absorbent body non-existing portion of the top sheet, whereby the rigidity of the absorbent article non-existing portion at the end in the front-rear direction of the absorbent article is increased, and the absorbent article is It becomes difficult to bend in the part where the absorber does not exist. At this time, since the embossed portion is provided in the shape of a square lattice composed of a plurality of straight portions that are inclined with respect to the front-rear direction and extend in one direction and the other direction, the embossed portion extends in the width direction in the absorber non-existing portion. The absorbent article is less likely to bend so that a fold is formed. Further, since the line width of the straight line portion forming the embossed portion is formed to be larger than the length in the thickness direction of the absorbent body non-existing portion of the absorbent article, the plane direction in the absorbent body non-existing portion of the absorbent article. Increases the rigidity of.

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. An example of the absorber provided in the absorbent article shown in FIG. 2 is shown, and a width direction sectional view of the absorber is shown. 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.

FIG. 1 and FIG. 2 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, and FIG. 2 shows a II-II sectional view of the absorbent article shown in FIG. 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 body 11 is not particularly limited as long as it contains an absorbent material capable of absorbing excrement such as urine. As the absorbent body 11, for example, a molded body obtained by molding an absorbent material into a predetermined shape is used, or the molded body is covered with a covering sheet such as a paper sheet (for example, tissue paper or thin paper) or a liquid-permeable nonwoven fabric sheet. It can be used. Examples of the absorbent material include hydrophilic fibers such as pulp fibers, water-absorbent resins such as polyacrylic acid-based, polyaspartic acid-based, cellulose-based, starch-acrylonitrile-based and the like. Further, the water absorbent material may include polyolefin fibers such as polyethylene and polypropylene, and polyester fibers such as PET and heat fusible fibers such as polyamide fibers. These heat-fusible fibers may be hydrophilized with a surfactant or the like in order to enhance the affinity with urine and the like.

The absorbent material preferably contains hydrophilic fibers from the viewpoint of increasing the absorption rate of urine and the like. Further, from the viewpoint of increasing the absorption capacity, the absorbent material preferably contains a water absorbent resin. Therefore, the absorbent body 11 preferably contains hydrophilic fibers (particularly pulp fibers) and a water absorbent resin. In this case, it is preferable to use, for example, an aggregate of hydrophilic fibers mixed or sprinkled with a water absorbent resin.

The absorber 11 may be a sheet-shaped absorber. Examples of the sheet-shaped absorber include those formed so as to have a water-absorbent resin between non-woven fabrics and no pulp fibers. Since the sheet-shaped absorbent body thus formed has the water absorbent resin between the non-woven fabrics, a high absorption capacity can be realized. Further, since the sheet-shaped absorber does not have pulp fibers between the nonwoven fabrics, it can be formed thin without being bulky.

The shape (planar shape) of the absorber 11 is not particularly limited. The shape of the absorber 11 may be appropriately determined depending on the application, and examples thereof include a substantially rectangular shape, an hourglass shape, a gourd shape, and a battledore shape.

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 drawing, a mount 4 is provided between the absorber 11 and the back sheet 3, and the mount 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.

The top sheet 2 and the back sheet 3 extend to the front side and the rear side of the absorber 11, and the absorber nonexisting portions 10 are formed on the front side and the rear side of the absorber 11. When the backing sheet 4 is provided between the absorber 11 and the back sheet 3, the backing sheet 4 also extends to the front side and the back side of the absorber 11, and in this case also, the front side and the back side of the absorber 11. Absorber non-existing portion 10 is formed at. In the absorber non-existing portion 10, the top sheet 2 and the back sheet 3 are provided so as to overlap each other, or the top sheet 2, the mount 4 and the back sheet 3 are provided so as to overlap each other.

The absorber non-existing portion 10 at the end in the front-rear direction y of the absorbent article 1 has low rigidity because the absorber 11 is not present. Therefore, the absorbent article 1 is easily bent at the absorber non-existing portion 10. For example, it becomes difficult to spread the absorbent article in a plane when setting the absorbent article, or the end portion of the absorbent article in the front-back direction y is easily folded back when the absorbent article is used.

From the above concerns, in the absorbent article 1, the top sheet 2 has the square lattice-shaped embossed portions 7. 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. The embossed portion 7 is provided at least in the absorber non-existing portion 10 of the top sheet 2, and the line width of the straight line portion 8 forming the embossed portion 7 is in the thickness direction z of the absorber non-existing portion 10 of the absorbent article 1. It is formed larger than the length. By providing the embossed portion 7 in the absorber non-existing portion 10 of the top sheet 2 as described above, the rigidity of the absorber non-existing portion 10 is increased, and the absorbent article 1 is less likely to bend in the absorber non-existing portion 10. In particular, since the embossed portion 7 is composed of a plurality of linear portions 8 that are inclined with respect to the front-rear direction y and extend in one direction and the other direction, the absorbent article 1 has the absorbent body non-existing portion 10 in the width direction. It becomes difficult to bend so that a fold line extending to x is formed. That is, the absorbent article 1 is less likely to bend in the front-rear direction y in the absorber nonexisting portion 10. Further, since the line width of the straight line portion 8 forming the embossed portion 7 is formed larger than the length of the absorbent body non-existing portion 10 of the absorbent article 1 in the thickness direction z, the absorbent body 1 of the absorbent article 1 is not formed. The rigidity of the existing portion 10 in the plane direction is increased.

The thickness of the absorbent article can be measured by a thickness gauge, for example, a thickness gauge SM-130 manufactured by Teclock Co., Ltd. The absorbent article is sandwiched between the anvil and the probe to measure the thickness. At that time, the thickness gauge SM-130 measures the thickness so that the final pressure becomes 2.2 N or less.

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 increasing the rigidity of 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 the plurality of first straight line portions 8A and the plurality of second straight line portions 8B intersect each other to form a plurality of substantially diamond-shaped or substantially square non-embossed portions 9 on the topsheet 2. "Approximate diamonds" and "substantially squares" include not only perfect rhombuses and perfect squares, but also rhombuses with rounded corners, squares with rounded corners, rhombuses with cut corners, and squares with cut corners. Be done. 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 into a rhombus or a square with rounded corners, or a rhombus or a square with rounded corners. It is preferable that a plurality of substantially diamond-shaped or substantially square 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, the absorbent article 1 is less likely to bend in the front-rear direction y in the absorber non-existing portion 10.

When the first straight line portion 8A and the second straight line portion 8B are provided as described above, 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. 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.

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.

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 embossed portion 7 is provided at least in the absorber nonexisting portion 10 of the top sheet 2, and may be provided in a region overlapping the absorber 11 of the top sheet 2. In this case, in the region of the top sheet 2 that overlaps with the absorber 11, urine or the like is easily diffused at the embossed portion 7, and at the non-embossed portion 9, urine or the like permeates the top sheet 2 and is quickly absorbed by the absorber 11. It is easy to be done. That is, by consolidating the topsheet 2 at the embossed portions 7, the diffusibility of urine or the like in the plane direction in the topsheet 2 is increased, whereas at the non-embossed portions 9, the topsheet 2 is not consolidated and the urine or the like Easily penetrates the top sheet 2. The embossed portion 7 is preferably provided over the entire region of the topsheet 2 that overlaps with the absorber 11, and more preferably over the entire region of the topsheet 2.

The line width of the straight line portion 8 forming the embossed portion 7 is preferably smaller than the length in the thickness direction z of the portion of the absorbent article 1 where the absorbent body 11 is provided. If the embossed portion 7 is formed in this way, the diffusibility of urine or the like on the top sheet 2 does not become excessively high, and the absorption capacity of the absorbent body 11 is easily secured. The length in the thickness direction z of the portion of the absorbent article 1 where the absorbent body 11 is provided means the maximum length in the thickness direction z of the portion.

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. As a result, the absorbent article 1 is unlikely to bend in the front-rear direction y in the absorber non-existing portion 10. In addition, urine and the like tend to diffuse preferentially on the top sheet 2 in the front-rear direction y, and the diffusibility in the width direction x is secured.

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. As described above, in the spunlaced nonwoven fabric and the air-through nonwoven fabric, the constituent fibers of the nonwoven fabric are preferably oriented in the front-rear direction y.

The absorbent body 11 may be a sheet-shaped absorbent body having a water absorbent resin between the nonwoven fabrics and not having pulp fibers. This will be described with reference to FIGS. 3 and 4. 3 and 4 show an example of a sheet-shaped absorbent body, FIG. 3 shows a cross-sectional view in the width direction of the sheet-shaped absorbent body, and FIG. 4 shows a partially cutaway plan view of the absorbent body shown in FIG. Represent

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 sheet member 12 is liquid-permeable, and a sheet member that can be used as the top sheet 2 can be used. As the sheet member 12, it is preferable to use a non-woven sheet member, that is, a non-woven sheet. 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, it is preferable that the non-sealing portion 16 is provided in a stripe shape extending in the front-rear direction y. Specifically, it is preferable that 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.

In the absorbent article 1 provided with the absorbent body 11 configured as described above, the absorbent article 1 is easily bent along the extending direction of the sealing portion 15. Therefore, in order to prevent the absorbent article 1 from bending in the sealing portion 15, it is preferable that the embossed portion 7 is formed in a portion of the top sheet 2 that overlaps with the sealing portion 15. As a result, the rigidity of the top sheet 2 in the portion overlapping the sealing portion 15 is increased, and the absorbent article 1 is less likely to bend in the sealing portion 15. In this case, it is preferable that the line width of the straight line portion 8 forming the embossed portion 7 is smaller than the length in the thickness direction z of the portion of the absorbent article 1 that overlaps the sealing portion 15. As a result, the absorbent article 1 has a certain thickness even in the portion that overlaps the sealing portion 15, and the rigidity of the absorbent article 1 in the planar direction is easily secured.

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. Among them, the absorbent article of the present invention can be particularly suitably applied to a urine pad (including a light incontinence pad) and a sanitary napkin in which bending at the end in the front-rear direction is likely to occur.

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 10: Absorbent non-existing portion 11: Absorber 12: Sheet member 13: Water absorbent resin 14: Adhesive layer 15: Sealing portion 16: Non-sealing portion

Claims (9)

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 top sheet and the back sheet extend to the front side and the rear side of the absorber, and the absorber non-existing portion is formed on the front side and the rear side of the absorber,
The top sheet has a square lattice-shaped embossed portion composed of a plurality of straight line portions that are inclined with respect to the front-rear direction and extend in one direction and the other direction,
The embossed portion is provided at least in the absorber non-existing portion of the top sheet,
The absorbent article is characterized in that the line width of the straight line portion constituting the embossed section is larger than the length of the absorbent article-free section of the absorbent article in the thickness direction. 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,
A mount is provided between the absorber and the back sheet,
The top sheet, the back sheet and the mount extend to the front side and the rear side of the absorber, the absorber non-existing portion is formed on the front side and the rear side of the absorber,
The top sheet has a square lattice-shaped embossed portion composed of a plurality of straight line portions that are inclined with respect to the front-rear direction and extend in one direction and the other direction,
The embossed portion is provided at least in the absorber non-existing portion of the top sheet,
The absorbent article is characterized in that the line width of the straight line portion constituting the embossed section is larger than the length of the absorbent article-free section of the absorbent article in the thickness direction. The absorbent article according to claim 1 or 2, wherein the linear portion that constitutes the embossed portion is provided to be inclined clockwise or counterclockwise with respect to the front-rear direction at an angle of 5° or more and 44° or less. .. The said linear part which comprises the said embossing part is provided inclining clockwise or counterclockwise with respect to the front-back direction at an angle of 15 degrees or more and 30 degrees or less. .. The embossed portion is provided in a region of the top sheet that overlaps with the absorber,
The absorbent article according to any one of claims 1 to 4, wherein a line width of the linear portion forming the embossed portion is smaller than a length in a thickness direction of a portion of the absorbent article in which the absorber is provided. .. The absorbent body is configured not to have a pulp fiber having a water-absorbent resin between the sheet members, a sealing portion where the sheet members are joined, and a non-sealing portion where the sheet members are not joined. Having a water-absorbent resin in the non-sealing portion,
The non-sealing portion is provided in a stripe shape extending in the front-rear direction,
The absorbent article according to any one of claims 1 to 5, wherein the embossed portion is provided in a portion of the top sheet that overlaps with the sealing portion. The absorbent article according to claim 6, wherein a line width of the straight line portion forming the embossed portion is smaller than a length in a thickness direction of a portion of the absorbent article that overlaps the sealing portion. The absorbent article according to any one of claims 1 to 7, wherein the top sheet is made of a short fiber non-woven fabric, and constituent fibers of the non-woven fabric are oriented in the front-rear direction. The absorbent article according to any one of claims 1 to 8, wherein the embossed portion is a hot embossed portion.

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