CN210114579U - Absorbent article - Google Patents

Abstract

Provided is an absorbent article which is less likely to bend at the front-rear direction end portions where no absorber is present. An absorbent article 1 having a liquid-permeable top sheet 2, a liquid-impermeable back sheet 3, and an absorbent body 11 provided between the top sheet 2 and the back sheet 3, the top sheet 2 and the back sheet 3 extending forward and rearward relative to the absorbent body 11, the absorbent body 11 having front and rear sides forming an absorbent body absent portion 10; the top sheet 2 has embossed portions 7 in a quadrangular lattice shape composed of a plurality of straight portions 8 inclined with respect to the front-rear direction y and extending in one direction and the other direction; the embossed portion 7 is provided at least in the absorbent body non-existing portion 10 of the top sheet 2; the line width of the linear portion 8 constituting the embossed portion 7 is larger than the length in the thickness direction of the absorbent body absent portion 10 of the absorbent article 1.

Description

Absorbent article

Technical Field

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

Background

Various absorbent articles such as a diaper, a sanitary napkin, and a disposable diaper are widely known. These absorbent articles are desirably formed to be thin so as not to increase in volume in the crotch of the wearer when worn. On the other hand, an absorbent article formed to be thin is difficult to spread flat when worn between the wearer's thighs, or may be bent when used. For example, patent document 1 discloses an absorbent article in which fibers are formed of a nonwoven fabric oriented in one direction, and which further includes a top sheet including a plurality of embossed lines extending orthogonally to the fiber orientation direction of the nonwoven fabric, each embossed line being formed by a plurality of intermittently provided concave portions, the longitudinal direction of each concave portion being arranged so as to intersect the fiber orientation direction.

Documents of the prior art

Patent document

Patent document 1, Japanese patent application laid-open No. 2007-117111

SUMMERY OF THE UTILITY MODEL

Problem to be solved by utility model

In the absorbent article, a portion where the absorbent body is not present at the end portions in the front-rear direction is formed particularly thin, and therefore the portion is easily bent. In view of the above, an object of the present invention is to provide an absorbent article that is not likely to cause bending at the end portions in the front-rear direction where the absorber is not present.

Means for solving the problems

The absorbent article of the present invention, which can solve the above-mentioned problems, is provided with a front-back direction and a width direction, and has a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorber provided between the top sheet and the back sheet, wherein the top sheet and the back sheet extend to the front side and the back side relative to the absorber, and the front side and the back side of the absorber form an absorber absent portion; the top sheet has a quadrangular grid-shaped embossed portion composed of a plurality of straight line portions inclined with respect to the front-rear direction and extending in one direction and the other direction; the embossed section is provided at least in the absorbent body absent section of the top sheet; the line width of the linear portion constituting the embossed portion is larger than the length in the thickness direction of the absorbent body absent portion of the absorbent article. The absorbent article of the utility model is further provided with lining paper between the absorber and the back sheet; the top sheet, back sheet and lining paper extend to the front side and the rear side of the absorber, and absorber non-existing parts are formed on the front side and the rear side of the absorber; the line width of the linear portion constituting the embossed portion may be larger than the length in the thickness direction of the absorbent body absent portion of the absorbent article.

Although the rigidity of the front and rear end portions of the absorbent article is reduced due to the absence of the absorbent body, the absorbent article of the present invention has an embossed portion provided in the absorbent body absent portion of the top sheet, thereby improving the rigidity of the absorbent article at the absorbent body absent portion of the front and rear end portions of the absorbent article and making the absorbent article less likely to bend at the absorbent body absent portion. In this case, since the embossed portion is provided in a rectangular grid shape including a plurality of straight portions extending in one direction and the other direction while being inclined with respect to the front-rear direction, folds extending in the width direction are formed in the absorbent body absent portion, and therefore the absorbent article is less likely to be folded. Further, since the line width of the linear portion constituting the embossed portion is formed to be larger than the length in the thickness direction of the absorbent body absent portion of the absorbent article, the rigidity in the planar direction of the absorbent article at the absorbent body absent portion is improved.

The straight portion constituting the embossed portion is preferably disposed to be inclined at an angle of 5 ° to 44 ° clockwise or 5 ° to 44 ° counterclockwise with respect to the front-rear direction, and further preferably inclined at an angle of 15 ° to 30 ° clockwise or 15 ° to 30 ° counterclockwise with respect to the front-rear direction. By providing the linear portion in this manner, the absorbent body absent portion of the absorbent article is more resistant to bending in the front-rear direction.

Preferably, the embossed portion is provided in a region of the top sheet overlapping the absorber, and a line width of the linear portion constituting the embossed portion is smaller than a length of a portion of the absorbent article in a thickness direction of the portion where the absorber is provided. By forming the embossed portion in this way, the diffusibility of urine or the like in the top sheet is not excessively increased, and the absorption capacity in the absorbent body is easily ensured.

Preferably, the absorbent body is configured to have a water-absorbent resin between the sheet members without pulp fibers, and to have a sealed portion where the sheet members are joined to each other and a non-sealed portion where the sheet members are not joined to each other, the water-absorbent resin being disposed in the non-sealed portion; the non-seal portion is provided in a strip shape extending in the front-rear direction, and the embossed portion is provided at a portion of the top sheet overlapping the seal portion. In the absorbent article provided with the absorbent body configured as described above, the absorbent article is easily folded in the extending direction of the seal portion. Here, in order to make the absorbent article less likely to bend at the seal portion, it is preferable that an embossed portion be formed in a portion of the top sheet that overlaps with the seal portion. This increases the rigidity of the top sheet at the portion overlapping the seal portion, and makes the absorbent article less likely to bend at the seal portion. Further, it is preferable that the line width of the linear portion constituting the embossed portion is smaller than the length in the thickness direction of the portion of the absorbent article overlapping the seal portion, whereby the rigidity of the absorbent article in the plane direction is easily ensured.

Preferably, the top sheet is composed of a staple fiber nonwoven fabric, and the constituent fibers of the nonwoven fabric are oriented in the front-rear direction. This makes the absorbent body absent portion of the absorbent article less likely to bend in the front-rear direction. Further, urine or the like is made to spread preferentially in the front-rear direction on the top sheet, and the spread in the width direction is ensured.

Preferably, the embossed portion is a thermal embossed portion. This can improve the rigidity of the top sheet at the embossed portion.

Beneficial effects of the utility model

The utility model discloses an absorbent article through set up embossing part in the absorber non-existence portion of top plate, improves the rigidity of absorbent article in the absorber non-existence portion department of the tip of front and back direction, makes absorbent article be difficult for buckling in absorber non-existence portion department. In this case, since the embossed portion is provided in a rectangular grid shape including a plurality of straight portions extending in one direction and the other direction while being inclined with respect to the front-rear direction, folds extending in the width direction are formed in the absorbent body absent portion, and therefore the absorbent article is less likely to be folded. Further, since the line width of the linear portion constituting the embossed portion is formed to be larger than the length in the thickness direction of the absorbent body absent portion of the absorbent article, the rigidity in the planar direction of the absorbent article at the absorbent body absent portion is improved.

Drawings

Fig. 1 shows an example of an absorbent article of the present invention, and shows a plan view of the absorbent article viewed from the skin surface side.

Fig. 2 shows a cross-sectional view at ii-ii of the absorbent article shown in fig. 1.

Fig. 3 shows an example of an absorber arranged in the absorbent article shown in fig. 2, and shows a cross-sectional view in the width direction of the absorber.

Fig. 4 is a partially cut-away plan view of the absorbent body shown in fig. 3, as viewed from the skin surface side.

Description of the symbols

1. An absorbent article; 2. a topsheet; 3. a back sheet; 4. lining paper; 5. a side panel; 6. an elastic member for standing; 7. an embossed portion; 8. a linear portion 8A, a first linear portion 8B, a second linear portion; 9. a non-embossed portion; 10. an absorbent body absent section; 11. an absorbent body; 12. a sheet member; 13. a water-absorbent resin; 14. an adhesive layer; 15. a sealing part; 16. a non-sealed part.

Detailed Description

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

Fig. 1 and 2 show an example of a light incontinence pad as an absorbent article of the present invention. Fig. 1 shows a plan view of an absorbent article (light incontinence pad) viewed from the topsheet side, and fig. 2 shows a cross-sectional view at ii-ii of the absorbent article shown in fig. 1. In the drawings of the present application, arrow x indicates a width direction, arrow y indicates a front-back direction, and a direction perpendicular to a plane formed by arrows x and y indicates a thickness direction z. In fig. 1, the upper side of the drawing sheet corresponds to the front side of the absorbent article, and the lower side of the drawing sheet corresponds to the rear side of the absorbent article.

The absorbent article 1 has a top sheet 2, a back sheet 3, and an absorbent body 11 disposed between the top sheet 2 and the back sheet 3. The top sheet 2 is disposed on the skin surface side of the absorbent body 11, and the back sheet 3 is disposed on the non-skin surface side of the absorbent body 11. The excrement that has passed through the top sheet 2 is absorbed by the absorbent body 11. The back sheet 3 prevents the excrement from leaking to the outside.

The absorbent article 1 is provided with a front-back direction y and a width direction x. The front-back direction y corresponds to a direction extending in the front-back direction between the wearer's thighs when the absorbent article is worn. The width direction x is a direction perpendicular to the front-back direction y and on the same plane as the absorbent article, and corresponds to the left-right direction of the wearer when the absorbent article is worn. When the absorbent article is worn by a wearer, the side facing the skin of the wearer is the skin surface side, and the opposite side is the non-skin surface side.

The top sheet 2 is disposed on the skin surface side of the absorbent body 11 and is provided to face the skin of the wearer when the absorbent article is worn. The top sheet 2 is preferably liquid-permeable. As the top sheet 2, for example, a nonwoven fabric made of hydrophilic fibers such as cellulose, rayon, and cotton; or a nonwoven fabric formed of hydrophobic fibers of polyolefin (e.g., polypropylene, polyethylene), polyester (e.g., PET), polyamide (e.g., nylon), or the like, in which the surfaces of the hydrophobic fibers are hydrophilized by a surfactant. Further, as the top sheet 2, woven cloth, knitted cloth, perforated plastic cloth, or the like may be used.

The backsheet 3 is disposed on the non-skin surface side of the absorbent body 11, and is preferably liquid impermeable. As the back sheet 3, a nonwoven fabric or a plastic film made of hydrophobic fibers such as polyolefin (e.g., polypropylene or polyethylene), polyester (e.g., PET), and polyamide (e.g., nylon) can be used. Further, a laminate of nonwoven fabric and plastic film may be used as the back sheet 3.

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, an absorbent body in which an absorbent material is molded into a molded body having a predetermined shape, or an absorbent body in which the molded body is covered with a covering sheet such as a paper sheet (for example, thin paper or tissue paper) or a liquid-permeable nonwoven fabric sheet may be used. Examples of the absorbent material include hydrophilic fibers such as pulp fibers, and water-absorbent resins such as polyacrylic acid-based, polyaspartic acid-based, cellulose-based, and starch/acrylonitrile-based resins. The water-absorbent material may contain polyolefin fibers such as polyethylene and polypropylene, polyester fibers such as PET, or heat-fusible fibers such as polyamide fibers. These hot-melt fibers may be subjected to hydrophilization treatment with a surfactant or the like in order to improve the affinity with urine or the like.

The absorbent material preferably contains hydrophilic fibers from the viewpoint of increasing the absorption rate of urine or the like. In addition, the absorbent material preferably contains a water-absorbent resin from the viewpoint of improving the absorption capacity. Therefore, it is preferable that the absorbent body 11 contains hydrophilic fibers (particularly pulp fibers) and a water-absorbent resin. In this case, for example, the water-absorbent resin is preferably mixed or scattered in the assembly of hydrophilic fibers.

The absorbent body 11 may be a sheet-like absorbent body. As the sheet-like absorbent body, there is exemplified one formed with a water-absorbent resin between nonwoven fabrics and without pulp fibers. The sheet-like absorbent body formed in this manner can achieve a high absorption capacity because the water-absorbent resin is interposed between the nonwoven fabrics. Further, since the sheet-like absorbent body does not have pulp fibers between the nonwoven fabrics, it can be formed to be thin without increasing the volume.

The shape (planar shape) of the absorbent body 11 is not particularly limited. The shape of the absorbent body 11 may be appropriately determined according to the application, and examples thereof include a substantially rectangular shape, an hourglass shape, a gourd shape, and a shuttlecock shape.

Preferably, the absorbent article 1 is provided with side sheets 5 extending in the front-rear direction y on both sides in the width direction x of the top sheet 2. The side sheets 5 are joined to both sides of the top sheet 2 in the width direction x. In fig. 1 and 2, three elastic members 6 for standing 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 surface portion of the side sheet 5 is raised toward the skin of the wearer by the contraction force of the raising elastic member 6, thereby forming a raising flap to prevent lateral leakage of excrement such as urine. The side sheet 5 may be formed of a liquid-impermeable plastic film or a liquid-impermeable nonwoven fabric, and a sheet material that can be used for the back sheet 3 may be used.

In the drawings, the absorbent body 11 and the back sheet 11 are provided with the interleaving paper 4 therebetween, and the shape retention of the absorbent article 1 can be improved by the interleaving paper 4. The backing paper 4 may be composed of crepe paper or nonwoven fabric. The interleaving paper 4 may not be provided.

Preferably, in the case of using a nonwoven fabric as the top sheet 2, the back sheet 3, or the side sheet 5, a spunbonded nonwoven fabric, a hot-rolled nonwoven fabric, a point-bonded nonwoven fabric, a meltblown nonwoven fabric, an air-laid nonwoven fabric, an SMS nonwoven fabric, or the like can be used as the nonwoven fabric.

The top sheet 2 and the back sheet 3 extend forward and rearward relative to the absorbent body 11, and absorbent body absent portions 10 are formed forward and rearward of the absorbent body 11. When the interleaving paper 4 is provided between the absorbent body 11 and the backsheet 3, the interleaving paper 4 also extends forward and rearward relative to the absorbent body 11, and in this case, the absorbent body absent portions 10 are formed forward and rearward relative to the absorbent body 11. In the absorbent body absent portion 10, the top sheet 2 and the back sheet 3 are provided in an overlapping manner, or the top sheet 2, the interleaving paper 4, and the back sheet 3 are provided in an overlapping manner.

The absorbent-body absent portion 10 at the end in the front-rear direction y of the absorbent article 1 is low in rigidity because the absorbent body 11 is absent. Therefore, the absorbent article 1 is easily folded at the absorbent body absent portion 10. For example, it is difficult to spread the absorbent article flat when wearing the absorbent article, and the end portions in the front-rear direction y of the absorbent article are likely to be folded when using the absorbent article.

In view of the above-described concerns, the absorbent article 1 has the embossed portions 7 in the shape of a rectangular grid formed on the top sheet 2. The embossed portion 7 in the rectangular grid shape is formed of a plurality of straight portions 8, and the straight portions 8 extend in one direction and the other direction while being inclined with respect to the front-rear direction y, and the top sheet 2 is pressed by the straight portions 8. The embossed portion 7 is provided at least in the absorbent body absent portion 10 of the top sheet 2, and the line width of the linear portion 8 constituting the embossed portion 7 is formed to be larger than the length in the thickness direction z of the absorbent body absent portion 10 of the absorbent article 1. By providing the embossed portion 7 in the absorbent body absent portion 10 of the top sheet 2 in this manner, the rigidity of the absorbent body absent portion 10 can be increased, and the absorbent article 1 can be made less likely to bend at the absorbent body absent portion 10. In particular, since the embossed portion 7 is provided so as to be constituted by a plurality of straight portions 8 inclined with respect to the front-rear direction y and extending in one direction and the other direction, so that the absorbent body absent portion 10 is formed with creases extending in the width direction x, the absorbent article is less likely to be folded. That is, the absorbent article 1 is less likely to be folded in the front-rear direction y at the absorbent body absent portion 10. Further, since the line width of the linear portion 8 constituting the embossed portion 7 is formed to be larger than the length in the thickness direction z of the absorbent body absent portion 10 of the absorbent article 1, the rigidity in the planar direction of the absorbent body absent portion 10 of the absorbent article 1 is improved.

The thickness of the absorbent article can be measured by a thickness meter, for example, SM-130 manufactured by tebuch corporation. The absorbent article is clamped between the anvil and the gauge and the thickness is measured, at which time the thickness measurement is performed in the thickness gauge SM-130 such that the final pressure is 2.2N 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 either case, the embossed portion 7 is preferably formed by the top sheet 2 being pressed alone. Further, from the viewpoint of improving the rigidity of the embossed portion 7, the embossed portion 7 is preferably formed by being pressed in a heated state, that is, preferably, the embossed portion 7 is a thermal embossed portion. In this case, the top sheet 2 is preferably made of a nonwoven fabric containing heat-fusible fibers. In addition, it is preferable that at least a part of the constituent fibers of the nonwoven fabric is melted in the thermally embossed portion. Examples of the heat-fusible fibers include fibers made of thermoplastic resins such as polyolefins (e.g., polypropylene and polyethylene), polyesters (e.g., PET), and polyamides (e.g., nylon).

The four-sided mesh-like embossed portion 7 is formed by intersecting a plurality of linear portions 8A (hereinafter, referred to as "first linear portions") and a plurality of linear portions 8B (hereinafter, referred to as "second linear portions"), the plurality of first linear portions 8A being inclined with respect to the front-rear direction y and extending in one direction, and the plurality of second linear portions 8B being inclined with respect to the front-rear direction y and extending in the other direction. Preferably, the top sheet 2 has a plurality of first linear portions 8A and second linear portions 8B intersecting each other to form a plurality of substantially diamond-shaped or substantially square non-embossed portions 9. "substantially diamond" and "substantially square" include not only complete diamonds or complete squares but also rounded diamonds, rounded squares, chamfered diamonds, chamfered squares. For example, when the top sheet 2 is embossed in a rectangular grid pattern, the line width of the first straight portion 8A and/or the second straight portion 8B may be thicker than the other portions at the intersection between the first straight portion 8A and the second straight portion 8B. In this case, the non-embossed portion 9 can form a rounded diamond or square, or a chamfered diamond or square. Preferably, the substantially rhombic or substantially square non-embossed portions 9 are formed in a plurality of positions arranged in the width direction x and the length direction y.

A first straight line portion 8A inclined at an angle of preferably 5 ° or more, more preferably 10 ° or more, and still more preferably 15 ° or more clockwise with respect to the front-rear direction y; in addition, it is preferably inclined at an angle of 44 ° or less, more preferably at an angle of 35 ° or less, and still more preferably at an angle of 30 ° or less. A second straight line portion 8B inclined at an angle of preferably 5 ° or more, more preferably 10 ° or more, and still more preferably 15 ° or more counterclockwise with respect to the front-rear direction y; in addition, it is preferably inclined at an angle of 44 ° or less, more preferably at an angle of 35 ° or less, and still more preferably at an angle of 30 ° or less. By providing the first linear portion 8A and the second linear portion 8B in this manner, the absorbent article 1 is more resistant to bending in the front-rear direction at the absorbent body absent portion 10.

When the first straight portion 8A and the second straight portion 8B are provided as described above, the non-embossed portion 9 is formed so that the length in the front-rear direction y is longer than the length in the width direction x. Specifically, each of the unembossed portions 9 surrounded by the embossed portions 7 having a square lattice shape is formed so 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 the length in the width direction x; further, the amount is preferably 4.0 times or less, and more preferably 3.0 times or less.

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

The plurality of first linear portions 8A are preferably arranged to be inclined in one direction at substantially equal pitches, and the plurality of second linear portions 8B are preferably arranged to be inclined in the other direction at substantially equal pitches. The pitch length of the plurality of first linear portions 8A and the pitch length of the plurality of second linear portions 8B are preferably 3mm or more, more preferably 4mm or more, and still more preferably 5mm or more; further, it is preferably 15mm or less, more preferably 12mm or less, and still more preferably 10mm or less. The pitch length of the plurality of first linear portions 8A (or second linear portions 8B) is a distance between centers of line widths of adjacent first linear portions 8A (or second linear portions 8B). The line widths of the first straight portion 8A and the second straight portion 8B are preferably 0.5mm or more, and more preferably 0.8mm or more; further, it is preferably 2.5mm or less, and more preferably 2.0mm or less. The pitch length of the plurality of first straight portions 8A is preferably larger than the line width of the first straight portions 8A, and for example, the pitch length of the plurality of first straight portions 8A is preferably 2 times or more, and more preferably 3 times or more the line width of the first straight portions 8A; further, the amount is preferably 20 times or less, more preferably 15 times or less, and still more preferably 10 times or less. The pitch length of the plurality of second linear portions 8B is preferably larger than the line width of the second linear portions 8B, and for example, the pitch length of the plurality of second linear portions 8B is preferably 2 times or more, and more preferably 3 times or more the line width of the second linear portions 8B; further, the amount is preferably 20 times or less, more preferably 15 times or less, and still more preferably 10 times or less.

The embossed portion 7 may be provided at least in the absorbent body absent portion 10 of the top sheet 2, or may be provided in a region of the top sheet 2 overlapping with the absorbent body 11. At this time, urine or the like is likely to spread in the embossed portion 7 in the region of the top sheet 2 overlapping the absorbent body 11, and the urine or the like is likely to be absorbed quickly by the absorbent body 11 through the top sheet 2 in the non-embossed portion 9. That is, by compacting the top sheet 2 in the embossed portions 7, the diffusion of urine or the like into the plane direction of the top sheet 2 is improved, whereas by not compacting the top sheet 2 in the non-embossed portions 9, urine or the like is made to easily penetrate through the top sheet 2. The embossed portion 7 is preferably provided in the entire region of the top sheet 2 overlapping with the absorbent body 11, and further preferably provided across the entire region of the top sheet 2.

Preferably, the line width of the linear portion 8 constituting the embossed portion 7 is smaller than the length in the thickness direction z of the portion of the absorbent article 1 where the absorbent body 11 is provided. By forming the embossed portion 7 in this way, the diffusibility of urine or the like in the top sheet 2 is not excessively increased, and the absorption capacity in the absorbent body 11 is easily ensured. The length in the thickness direction z of the portion of the absorbent article 1 where the absorbent body 11 is provided is the maximum length in the thickness direction z of the portion.

Preferably, the top sheet 2 is composed of a nonwoven fabric, and the constituent fibers of the nonwoven fabric are oriented in the front-rear direction y. More preferably, the top sheet 2 is made of a staple fiber nonwoven fabric, and the constituent fibers of the nonwoven fabric are oriented in the front-back direction y. This makes the absorbent article 1 less likely to bend in the front-rear direction y at the absorbent body absent portion 10. Further, urine or the like is made to spread preferentially in the front-back direction y on the top sheet 2, and the spreading property in the width direction is secured.

Examples of the nonwoven fabric in which the constituent fibers are oriented in one direction include a spunbond nonwoven fabric, a hot-rolled nonwoven fabric, and a spunlace nonwoven fabric. The orientation direction of the constituent fibers of the nonwoven fabric can be confirmed by observing the surface of the nonwoven fabric with a microscope or the like. For example, in the case of a spunbonded nonwoven fabric, the orientation direction of the constituent fibers will be described below. The spunbonded nonwoven fabric is obtained by, for example, melting a polymer, extruding the polymer from a spinning nozzle, stretching the polymer, collecting the polymer on a conveyor or the like, and forming a web, and at this time, the web (fibers) collected on the conveyor is aligned in the traveling direction of the conveyor. In this case, therefore, the web (fiber) is oriented in the advancing direction (MD direction) of the conveyor belt. In the hot-rolled nonwoven fabric, the orientation direction of the constituent fibers can be aligned by appropriately setting the method of collecting the raw short fibers at the time of forming a fiber mass or the method of opening the fibers at the time of forming a web, when the nonwoven fabric is manufactured. In the spunlace nonwoven fabric, fibers can be stacked by controlling the flow of water streams dispersed by short fibers to align the orientation directions of the constituent fibers when forming the nonwoven fabric.

The top sheet 2 is preferably made of a hot-rolled nonwoven fabric or a needle-punched nonwoven fabric as a staple fiber nonwoven fabric. Since the hot-rolled nonwoven fabric or the needle-punched nonwoven fabric can be formed to have a relatively low bulk density, it has excellent permeability to urine and the like. As described above, the spunlace nonwoven fabric and the hot-rolled nonwoven fabric preferably have their constituent fibers oriented in the front-back direction.

The absorbent body 11 may be a sheet-like absorbent body configured to have a water-absorbent resin without pulp fibers between nonwoven fabrics. This will be described in detail with reference to fig. 3 and 4. Fig. 3 and 4 show an example of a sheet-like absorbent body, fig. 3 shows a cross-sectional view in the width direction of the sheet-like absorbent body, and fig. 4 shows a partially cut plan view of the absorbent body shown in fig. 3.

The absorbent body 11 has a plurality of sheet members 12, and a water-absorbent resin 13 is disposed between the sheet members 12 without disposing pulp fibers. That is, in the absorbent body 11, the sheet members 12 are disposed on the skin surface side and the non-skin surface side, respectively, and the water-absorbent resin 13 is disposed between the sheet members 12, but pulp fibers are not disposed between the sheet members 12. Further, pulp fibers that are inevitably mixed in manufacturing are allowed to exist between the sheet members 12. The absorbent body 11 can be formed to be thin while having a high absorption capacity by the above-described configuration.

The sheet member 12 is liquid-permeable, and a sheet member that can be used for the top sheet 2 can be used. As the sheet member 12, a nonwoven fabric sheet member, i.e., a nonwoven fabric sheet, can be preferably used. The sheet member 12 may be a sheet member on the skin surface side and a sheet member on the non-skin surface side, or may be a sheet member on the skin surface side and a sheet member on the non-skin surface side.

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

In fig. 3, an adhesive is applied in the sheet member 12 to form an adhesive layer 14, and the water-absorbent resin 13 is fixed to the sheet member 12 by the adhesive layer 14 in the non-seal 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 of the sheet members 12. The water-absorbent resin 13 may be fixed at least partially to the pressure-sensitive adhesive layer 14. If the water-absorbent resin 13 is fixed to the sheet member 12 by 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 absorbs, and the absorption capacity of the absorbent body 11 for urine and the like is more likely to be ensured. Even after the water-absorbent resin 13 absorbs the water-absorbent resin, 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 is prevented from becoming a block and causing discomfort to the wearer.

Preferably, the adhesive 14 does not inhibit the water absorption or swelling of the water-absorbent resin 13 while fixing the water-absorbent resin 13. In order to form such a pressure-sensitive adhesive layer 14, the pressure-sensitive adhesive layer 14 is preferably formed by a curtain coating method, a spiral coating method, an omega coating method, a coater method, or the like.

Preferably, the seal portion 15 maintains the joining of the sheet members 12 to each other even if the water-absorbent resin 13 absorbs water. This makes it easy to ensure the absorption capacity of the absorbent body 11 for urine and the like even after the water-absorbent resin 13 absorbs water. From such a viewpoint, the seal portion 15 is preferably formed by joining the sheet members 12 to each other with an adhesive such as a rubber-based adhesive or a styrene-based elastomer, or by welding the sheet members 12 to each other.

In the absorbent body 11, the non-sealed portion 16 is preferably provided in a strip shape extending in the front-rear direction y. Specifically, it is preferable that the non-sealing portion 16 is provided at least two places to extend in the front-rear direction y. At this time, the sealed portion 15 is sandwiched between the unsealed portions 16 in the width direction x, and the sealed portion 15 is provided at least at one position so as to extend in the front-rear direction y. Preferably, a seal portion 15 extending in the front-rear direction y is provided at each of one end portion and the other end portion of the absorbent body 11 in the width direction x. Therefore, the sealing portion 15 is also preferably arranged in a strip shape extending in the front-rear direction y. Preferably, the seal portion 15 is formed across the entirety in the front-rear direction y. By forming the absorbent body 11 in this way, urine and the like are easily diffused in the front-rear direction y in the sealed portion 15, and urine and the like that have entered the absorbent body 11 through the top sheet 2 are easily diffused in the front-rear direction y in the absorbent body 11, and are easily and quickly absorbed by the absorbent body 11. The non-sealed portions 16 are preferably arranged at three or more positions side by side in the width direction x, and preferably at four or more positions. The sealing portions 15 are preferably arranged at four or more positions, preferably five or more positions, side by side in the width direction x.

The length of each seal portion 15 in the width direction x is preferably 1mm or more, and more preferably 2mm or more; further, it is preferably 10mm or less, and more preferably 8mm or less. The length of each non-sealed portion 16 in the width direction x is preferably 5mm or more, and more preferably 8mm or more; further, it is preferably 50mm or less, more preferably 30mm or less, and still more preferably 20mm or less. The ratio of the length in the width direction x of the sealed portion 15 to the length in the width direction x of the unsealed portion 16, which is the length in the width direction x of the sealed portion 15/the length in the width direction x of the unsealed portion 16, is preferably 5/95 or more, more preferably 10/90 or more, and still more preferably 15/85 or more; further, it is preferably 50/50 or less, and more preferably 60/40 or less.

In the absorbent article 1 provided with the absorbent body 11 configured as described above, the absorbent article 1 is easily folded in the extending direction of the seal 15. Here, in order to make the absorbent article 1 less likely to be folded at the seal 15, it is preferable that an embossed portion 7 be formed at a portion of the top sheet 2 overlapping the seal 15. This increases the rigidity of the top sheet 2 at the portion overlapping the seal 15, and makes the absorbent article 2 less likely to bend at the seal 15. In this case, the line width of the linear portion 8 constituting the embossed portion 7 is preferably smaller than the length in the thickness direction z of the portion of the absorbent article 1 overlapping the seal portion 15. This makes it easy to ensure the rigidity of the absorbent article 1 in the planar direction, since the absorbent article 1 has a constant thickness at the portion overlapping the seal 15.

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 shown in the drawings, and may be a disposable diaper or a sanitary napkin.

When the water-absorbent article is a disposable diaper, the disposable diaper is composed of, for example, a front abdominal section, a back section, and a crotch section which is located between the front abdominal section and the back section and which includes an absorber. The front abdominal region corresponds to a portion that comes into contact with the abdominal side of the wearer when the disposable diaper is worn, and the rear back region corresponds to a portion that comes into contact with the back side of the wearer when the disposable diaper is worn. The crotch portion is located between the front abdominal portion and the rear abdominal portion and corresponds to a portion that contacts 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 fixing members at both ends in the width direction of the back part, and fixing the fixing members to the front abdominal part, it can be formed in the shape of underwear when worn. An underpants-type disposable diaper has an underpants shape having a waist opening and a pair of leg openings, and is formed into the shape of underpants before use.

When the water-absorbent article is a disposable diaper, the disposable diaper is formed with a laminate in which an absorbent body is disposed between a top sheet and a back sheet in order to form a front abdominal section, a back section, and a crotch section located between the front abdominal section and the back section. Further, the disposable diaper may be configured such that: an absorbent body is provided in a crotch portion of an exterior member having a front abdominal section, a back section, and a crotch portion located between the front abdominal section and the back section, and an absorbent body is disposed between a top sheet and a back sheet. In the latter case, the outer covering member is formed in the shape of underwear, whereby the outer covering member can be used as a pants-type disposable diaper. In either case, the top sheet or the absorbent body constituting the absorbent article as described above can be used as the absorbent article of the present invention. In particular, the absorbent article of the present invention can be particularly suitably used for a diaper (including a light incontinence pad) or a sanitary napkin in which the end portions in the front-rear direction are likely to be bent.

Claims (9)

1. An absorbent article having a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorbent body disposed between the top sheet and the back sheet, the absorbent article being provided with a front-back direction and a width direction,

a top sheet and a back sheet which extend to the front side and the back side of the absorbent body, and which form absorbent body absent portions on the front side and the back side of the absorbent body;

the top sheet has a quadrangular lattice-shaped embossed portion composed of a plurality of straight line portions inclined with respect to the front-rear direction and extending in one direction and the other direction;

the embossed portion is provided at least in the absorbent body absent portion of the top sheet;

the linear portion constituting the embossed portion has a line width larger than a length of the absorbent body absent portion of the absorbent article in a thickness direction.

2. An absorbent article having a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorbent body disposed between the top sheet and the back sheet, the absorbent article being provided with a front-back direction and a width direction,

a lining paper is arranged between the absorption body and the back sheet;

the top sheet, the back sheet, and the liner sheet extend to the front side and the rear side of the absorbent body, and absorbent body absent portions are formed on the front side and the rear side of the absorbent body;

the top sheet has a quadrangular lattice-shaped embossed portion composed of a plurality of straight line portions inclined with respect to the front-rear direction and extending in one direction and the other direction;

the embossed portion is provided at least in the absorbent body absent portion of the top sheet;

the linear portion constituting the embossed portion has a line width larger than a length of the absorbent body absent portion of the absorbent article in a thickness direction.

3. The absorbent article according to claim 1 or 2, wherein the linear portion constituting the embossed portion is provided so as to be inclined at an angle of 5 ° to 44 ° clockwise or 5 ° to 44 ° counterclockwise with respect to the front-rear direction.

4. The absorbent article according to claim 1 or 2, wherein the linear portion constituting the embossed portion is provided so as to be inclined at an angle of 15 ° to 30 ° clockwise or 15 ° to 30 ° counterclockwise with respect to the front-rear direction.

5. The absorbent article according to claim 1 or 2, wherein the embossed portion is provided in a region of the top sheet that overlaps with the absorber,

the linear portions constituting the embossed portion have a line width smaller than a length of a portion of the absorbent article in a thickness direction of the portion where the absorbent body is provided.

6. The absorbent article according to claim 1 or 2, wherein the absorbent body is configured to have a water-absorbent resin between sheet members without pulp fibers, and has a sealed portion where the sheet members are joined to each other and a non-sealed portion where the sheet members are not joined to each other, the water-absorbent resin being disposed in the non-sealed portion;

the non-sealing part is arranged into a strip shape extending in the front-back direction;

the embossed portion is provided in a portion of the topsheet overlapping the seal portion.

7. The absorbent article according to claim 6, wherein the line width of the linear portion constituting the embossed portion is smaller than the length in the thickness direction of the portion of the absorbent article overlapping the seal portion.

8. The absorbent article according to claim 1 or 2, wherein the top sheet is composed of a staple fiber nonwoven fabric, and constituent fibers of the nonwoven fabric are oriented in the front-back direction.

9. The absorbent article according to claim 1 or 2, wherein the embossed portion is a thermal embossed portion.

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