TW202112328A - Absorbent article - Google Patents

Abstract

To prevent a degradation in wearing comfort, reduce liquid residues on a surface, and make it difficult for body liquid that has been reversely returned to make contact with the skin. Provided is a sanitary napkin 1 comprising a surface sheet 3 and a second sheet 6 disposed adjacent to a non-skin side of the surface sheet 3. A plurality of protruding sections 10 protruding toward a skin side are formed on the surface sheet 3. A plurality of opening sections 11 passing through in the thickness direction are formed in the second sheet 6 inside the protruding sections 10. A squeeze section 12 that squeezes the surface sheet 3 and the second sheet 6 is formed at a position which is a region other than the protruding sections 10 and is adjacent to the opening sections 11. Since the opening sections 11 do not make direct contact with the skin, a degradation in wearing comfort can be prevented, and it is difficult for body liquid that has been reversely returned from the opening sections 11 to make contact with the skin. Since the body liquid absorbed to the protruding sections 10 is easily diffused to the squeeze section 12 due to dense and coarse fibers, passes through the second sheet 6 via the adjacent opening sections 11, and moves to a lower layer side, liquid residues on the surface can be reduced.

Description

Absorbent articles

The present invention relates to absorbent articles such as sanitary napkins, protective pads, and incontinence pads, and in detail relates to an absorbent article in which a large number of convex portions bulging toward the skin side are formed on a surface sheet.

Traditionally, as the surface material of absorbent articles, the market provides users with appropriate embossing patterns for various purposes, such as reducing the contact area with the skin to suppress the dampness, or improving the tactility while presenting the texture. In addition, as the aforementioned surface material, it has also been developed to form appropriate openings for various purposes such as increasing the absorption rate of body fluids, removing liquid residues on the surface, and eliminating stickiness. As such an absorbent article, the following patent documents 1, 2, etc. are mentioned, for example.

The following Patent Documents 1 and 2 disclose a composite sheet in which a first sheet and a second sheet are partially joined to form a large number of joints. At the same time, the first sheet is in a part other than the joint. A convex portion is formed; an opening is formed on the non-joining portion of the second sheet opposite to the aforementioned convex portion and the first sheet.

【Prior Technical Literature】

【Patent Literature】

[Patent Document 1] Japanese Patent No. 4863697

[Patent Document 2] Japanese Patent No. 5994992

A conventional absorbent article with a surface sheet formed with a large number of convex portions bulging toward the skin side, in order to improve the liquid permeability of the surface sheet, the area other than the convex portion is formed to penetrate in the thickness direction of the surface sheet Open holes. However, in such a surface sheet, since the openings are exposed on the surface, when the protrusions are crushed by the body, the openings may directly touch the surface of the skin. At the periphery of the hole, sometimes due to the penetration and withdrawal of the needle during the hole processing, a burr protruding from the fiber end toward the skin is formed, so that the tip of the burr touches the skin surface, causing the wearer to cause irritation or irritation. Itching, pretending to worsen. In addition, the body fluids absorbed by the absorbent body from the openings may seep back to the surface side, and the seeped body fluids may come into contact with the skin, which may cause a sticky feeling.

As in the composite sheet described in Patent Documents 1 and 2, by forming an opening in the non-joining portion of the first sheet opposite to the aforementioned convex portion on the second sheet, even if the convex portion is crushed In this case, through the first sheet, the openings can also be prevented from directly contacting the skin surface, so that the generation of sticky feeling caused by re-oozing body fluids can be suppressed.

However, in the composite sheets described in Patent Documents 1 and 2, the body fluid absorbed by the first sheet constituting the convex portion diffuses to the base end portion of the convex portion, and the first sheet is transferred to the second sheet. Mobility and the mobility of the absorbent body on the lower side of the second sheet are not good, but there are cases where the first The junction between the sheet material and the second sheet material is likely to accumulate body fluids, and there is a possibility that liquid remains on the surface.

Therefore, the main subject of the present invention is to provide an absorbent article that prevents deterioration of the wearing feeling, reduces liquid residue on the surface, and makes it difficult for re-oozing body fluids to contact the skin.

In order to solve the above-mentioned problems, the first aspect provides an absorbent article including a surface sheet and a second sheet arranged adjacent to the non-skin side of the surface sheet;

On the aforementioned surface sheet, there are formed many convex parts bulging to the skin side;

The second sheet inside the convex portion is formed with a plurality of openings penetrating in the thickness direction;

A compression part formed by compressing the surface sheet and the second sheet is provided in a region other than the convex portion and at a position close to the opening portion.

In the above-mentioned first aspect, since the surface sheet is formed with a plurality of convex portions bulging toward the skin side, and the second sheet inside the convex portion is formed with a plurality of openings penetrating in the thickness direction Therefore, even when burrs are formed on the periphery of the opening, the opening does not directly touch the skin, and it is possible to prevent the deterioration of the wearing feeling. In addition, the bodily fluids that seep back from the openings do not easily touch the skin, thereby suppressing unpleasant wet stickiness.

Furthermore, since a compression portion formed by compressing the surface sheet and the second sheet is provided in the area other than the convex portion and near the opening portion, the body fluid absorbed by the convex portion of the surface sheet is provided , It is easy to diffuse to the compression part due to the thick fiber caused by the compression part. At the same time, the body fluid diffused to the compression part will pass through the second sheet through the adjacent opening part and be absorbed by the absorbent body on the lower layer side. Therefore, the liquid residue on the surface is reduced, thereby suppressing Makes unpleasant skin stickiness.

The second aspect provides an absorbent article, wherein the shortest separation distance between the opening part and the compression part is 0.5-10 mm.

In the above-mentioned second aspect, by arranging the opening portion and the compression portion at a specified separation distance, the body fluid diffused to the compression portion can easily flow into the opening portion, and pass through the opening portion from the second sheet to the lower layer side. The absorber moves.

A third aspect provides an absorbent article, wherein the opening portion is provided with a predetermined interval along an imaginary line provided at a position near the base end portion of the protrusion portion and parallel to the base end portion of the protrusion portion Plural configuration.

In the third aspect described above, since the openings are arranged in plural along an imaginary line provided at a position close to the base end of the protrusion and parallel to the base end of the protrusion, with a predetermined interval therebetween. Body fluids easily flow into the opening from the compression part, making it difficult for liquid to remain on the surface.

A fourth aspect provides an absorbent article, wherein the absorbent article is provided with one or more compression parts corresponding to each opening.

In the above-mentioned fourth aspect, since at least one compression part is provided corresponding to each opening part, body fluids can be reliably moved from the compression part to the opening part, and liquid residue on the surface is reduced.

A fifth aspect provides an absorbent article, wherein the area of the opening is 0.01-8 mm ² .

In the above-mentioned fifth aspect, in order to ensure the amount of body fluid passing through the opening portion and to suppress the re-infiltration of the body fluid, the opening portion is formed with an area within a specified range.

As described in detail above, the present invention can prevent the deterioration of the wearing feeling, reduce the liquid residue on the surface, and make it difficult for the re-oozing body fluids to contact the skin.

1: Sanitary napkins for physiological use

2: Back sheet

3: Surface sheet

4: Absorber

6: The second sheet

7: Side sheet

10: Convex

11: Opening part

12: Compression section

[Figure 1] A partially broken development view of the sanitary napkin 1 of the present invention.

[Figure 2] An enlarged plan view of the surface of the sanitary napkin 1.

[Fig. 3] The arrow view from line III-III in Fig. 2.

[Figure 4] An enlarged plan view of the surface of the sanitary napkin 1 of a modified example.

[FIG. 5] A cross-sectional view of the processing device 30 is shown.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

(Basic structure of sanitary napkin 1)

As shown in Figure 1, the sanitary napkin 1 of the present invention has a liquid-impermeable back sheet 2, a liquid-permeable surface sheet 3, an absorber 4, a second sheet 6, and a side sheet 7, 7; The aforementioned liquid-impermeable back sheet 2 is arranged on the non-skin side and is composed of a polyethylene sheet, etc.; the aforementioned liquid-permeable surface sheet 3 is arranged on the skin side and allows menstrual blood or secretions, etc. ( Hereinafter collectively referred to as body fluids) quickly permeate; the absorbent body 4 is interposed between the two sheets 2, 3 and is composed of cotton-like pulp or synthetic pulp, etc.; the second sheet 6 is located on the surface sheet 3 and the absorbent body 4 Between, adjacent to the non-skin side of the aforementioned surface sheet 3, and almost the same shape as the aforementioned surface sheet 3; the aforementioned side The side sheets 7, 7 are provided on both sides of the skin contact surface side and are provided to include almost the entire length in the longitudinal direction; and, around the absorbent body 4, the upper and lower end edges, the back sheet 2 and the surface The outer edges of the sheet 3 are joined by adhesives such as hot melt adhesives or bonding means such as heat sealing, ultrasonic sealing, and the like, and the edges on both sides of the sheet 3 are extended to the side from the absorber 4. The sheet 2 and the side sheet 7 are joined by an adhesive such as hot melt adhesive, heat sealing, ultrasonic sealing, or other joining means to form a wing portion without the absorber 4 interposed therebetween. In addition, in order to maintain the shape of the absorber 4 and improve its diffusibility, the absorber 4 may be surrounded by a covering sheet composed of crepe paper, non-woven fabric, or the like.

Hereinafter, the structure of the aforementioned sanitary napkin 1 will be described in further detail:

The backside sheet 2 uses a sheet having at least water resistance such as polyethylene, but it is preferable to use one having moisture permeability from the viewpoint of preventing stuffiness. This water-blocking and moisture-permeable sheet is suitable for the use of a microporous sheet obtained by melting and kneading an inorganic filler in an olefin resin such as polyethylene or polypropylene to form the sheet and then stretch it in one or two directions. . One or more adhesive layers (not shown) are formed on the non-skin side (outer surface) of the back sheet 2 along the long side direction of the sanitary napkin, and the sanitary napkin 1 is fixed to the underwear when it is installed on the body. The aforementioned back sheet 2 may also use a polyethylene laminated non-woven fabric formed by laminating a plastic film and a non-woven fabric.

Next, for the aforementioned surface sheet 3, a porous or non-porous non-woven fabric is suitably used. The material fibers constituting the non-woven fabric may be olefin-based, polyester-based, polyamide-based synthetic fibers such as polyethylene, polypropylene, etc., as well as regenerated fibers such as rayon or cuproammonium, and natural fibers such as cotton. And can use non-woven fabrics obtained by appropriate processing methods such as water needle method, spun bonding method, hot melt bonding method, melt blown method, and needle rolling method. Among these processing methods, the advantages of the water jet method are flexibility and drape, and the advantages of the hot-melt bonding method are that it is fluffy and has high compression recovery. On the aforementioned surface sheet When the material 3 forms many through holes, body fluids will be quickly absorbed, and the dryness will be better. The fibers of the non-woven fabric may be either long fibers or short fibers, but since it is ideal to have a towel-like touch, it is better to use short fibers. In addition, in order to facilitate the embossing process, olefin fibers such as polyethylene or polypropylene with a lower melting point can be used. In addition, a core-sheath type fiber or a composite fiber of a side-by-side type fiber or a split type fiber using a fiber with a high melting point as a core and a fiber with a low melting point as a sheath can also be suitably used.

The absorber 4 interposed between the aforementioned back sheet 2 and the surface sheet 3 is composed of, for example, cotton-like pulp and a water-absorbent polymer. The aforementioned water-absorbent polymer system is mixed in the pulp constituting the absorber in the form of granular powder, for example. The aforementioned pulp includes chemical pulp obtained from wood, cellulose fibers such as dissolving pulp, or artificial cellulose fibers such as rayon and acetate, and compared to hardwood pulp, in terms of function and price , It is more suitable to use conifer pulp with longer fiber length. In order to make the absorbent body 4 rich in flexibility, fiber-laden pulp is ideal for the manufacturing method of the absorbent body 4, but it can also be an air-laid absorbent body that can be reduced in volume. The aforementioned absorbent body 4 can be surrounded by a covering sheet (not shown) made of crepe paper or non-woven fabric in order to maintain the shape and improve the diffusibility.

In addition, synthetic fibers may be mixed in the aforementioned absorber 4. For the aforementioned synthetic fibers, for example, polyolefins such as polyethylene or polypropylene, polyesters such as polyethylene terephthalate or polybutylene terephthalate, polyamides such as nylon, and These copolymers, etc., may also be a mixture of these two types. In addition, a core-sheath type fiber with a fiber with a high melting point as a core and a fiber with a low melting point as a sheath, or a composite fiber such as a side-by-side type fiber and a split type fiber can also be used. In order to make the aforementioned synthetic fibers have affinity for body fluids, in the case of hydrophobic fibers, it is desirable to use those that have been surface-treated with a hydrophilizing agent.

The hydrophilic second sheet 6 arranged between the aforementioned surface sheet 3 and the absorber 4 may be one that is hydrophilic to body fluids. Specifically, it is possible to use regenerated fibers such as rayon or cuproammonium, and natural fibers such as cotton, which have hydrophilic properties in the material itself, or use olefin-based, polyester-based, or polyolefin-based materials such as polyethylene or polypropylene. Synthetic fibers such as amide-based fibers are surface-treated with a hydrophilizing agent to impart hydrophilicity. In addition, porous plastic sheets may also be used. As described later, this second sheet 6 integrates the surface sheet 3 and the second sheet 6 in a laminated state adjacent to the back side (non-skin side) of the surface sheet 3 Geothermal melting (embossing) and joining.

The above-mentioned second sheet 6 and the absorber 4 are desirably joined by intermittently applying a hot melt adhesive to the whole. By adhering the aforementioned second sheet 6 to the absorber 4 and making it close, the body fluid absorbed by the second sheet 6 will easily move to the absorber 4 quickly.

The width dimension of the aforementioned surface sheet 3, in the example shown in the figure, is slightly the same as the width of the absorber 4, except that it covers the absorber 4, and is different from the aforementioned surface sheet 3 on the outer side. The side sheet 7, specifically for the purpose of preventing the penetration of menstrual blood or secretions, or improving the touch of the skin, is composed of a non-woven fabric material that has been treated with appropriate water repellency or hydrophilic treatment. 7.

Such side sheet 7 can be formed by appropriate processing methods using natural fibers, synthetic fibers, or regenerated fibers as materials, but since it is ideal to improve the concealment of body fluids, it can be used to increase the basis weight. Non-woven. Specifically, over-based basis weight made into 13 ~ 23g / m ² of non-woven fabric, and in order to reliably prevent the body fluid permeable, coated with a suitable silicon-based, paraffin-based, alkyl chromic chloride-based agent such as dial dial Water treatment non-woven fabric.

The aforementioned side sheet 7 is a part that is more outside than the middle part in the width direction from The range from the designated inner position to the outer edge of the back sheet 2 is included. Adhesives such as hot melt glue are used to pass through the laminated sheet portion of the side sheet 7 and the back sheet 2 in the absorbent body. Both sides of 4 are formed with side flaps in which the absorber 4 is not interposed. On the other hand, the inner side portion of the aforementioned side sheet 7 is attached to the absorber 4 side (the skin side of the surface sheet 3) in a state of being laminated on the skin side of the surface sheet 3 in the example shown in the figure. , But also by folding in the width direction, and arranging elastic stretchable parts along the longitudinal direction of the folded part to form a three-dimensional hemming that rises toward the skin side. In addition, although the sanitary napkin 1 shown in the figure is not provided with wing-like flaps protruding sideways on both sides, it can also be provided with wings that are folded over the outer part of the panty section of the underwear when it is installed on the underwear. Shaped fin so that it protrudes to the side of the aforementioned side fin part.

(Protrusion, opening, compression)

In this sanitary napkin 1, as shown in Figs. 2 and 3, the surface sheet 3 is formed with a large number of convex parts 10, 10... which bulge toward the skin side. The convex portion 10 is hollow inside, and a space portion is formed between the surface sheet 3 and the second sheet 6 in the convex portion 10. The area other than the convex portion 10 is formed to be almost flat, and is a relatively concave area compared with the convex portion 10, and the non-skin side of this area is in contact with the second sheet 6 adjacent to the lower layer side.

For the above-mentioned convex portion 10, the planar shape of the bottom surface may be circular in the example shown in the figure, in addition, it may also be elliptical, rectangular, polygonal, etc. In addition, the cross-sectional shape is a semicircular dome shape in the example shown in the figure, but it can also be trapezoidal or rectangular. Ideally, as shown in the example, the bottom surface is circular in plan shape, and the cross-sectional shape is slightly semicircular dome shape, which can reduce the contact area with the skin and reduce friction, and increase the cushion feeling. The skin feels better, and the body fluid absorbed by the top of the convex portion 10 is more likely to diffuse to the base end of the convex portion 10, and is absorbed by the absorber 4 through the opening 11 described later.

The planar shape and size of the convex portion 10 can be appropriately determined from the viewpoint of improving cushioning properties and reducing the contact area with the skin. Specifically, the length A in the longitudinal direction of the ideal sanitary napkin 1 is 2.0 to 10.0 mm, and the length B in the width direction of the sanitary napkin 1 is 2.0 to 10.0 mm. In addition, the height C of the aforementioned convex portion 10 may be 0.5 to 5.0 mm.

By forming a large number of convex parts 10 on the surface sheet 3, the cushion feeling is increased, the skin feels soft, and the contact area with the skin surface is reduced, thereby reducing friction with the skin.

In addition, in the sanitary napkin 1 of the present sanitary napkin 1, the second sheet 6 inside the convex portion 10 is formed with a plurality of openings 11, 11... which penetrate in the thickness direction. The opening portion 11 is formed only in the second sheet 6 and is not provided in the surface sheet 3. In addition, the aforementioned opening portion 11 is formed only in the inside of the convex portion 10, that is, the bottom of the portion where the surface sheet 3 bulges to the skin side to form a space with the second sheet 6 (the second sheet 6), It is not provided in the area other than the aforementioned convex portion 10, that is, the part where the skin side of the second sheet 6 contacts and is laminated with the surface sheet 3.

By providing the aforementioned opening portion 11, body fluids can quickly pass through the second sheet 6 through the opening portion 11 and move to the absorber 4. In addition, since the opening portion 11 is the second sheet 6 formed inside the convex portion 10, the skin side of the opening portion 11 is covered by the surface sheet 3 constituting the convex portion 10, and does not directly contact the skin surface. . Therefore, even if a fiber end (burr) protruding toward the skin side is formed on the periphery of the hole 11 due to the insertion and withdrawal of the pin during the drilling process, the fiber end will not directly touch the skin surface. Therefore, the sense of wearing is good.

In order to ensure the liquid permeability of the opening portion 11 while suppressing the re-infiltration of body fluids from the opening portion 11, the area of the opening portion 11 on the skin side of the second sheet 6 may be 0.01 to 8 mm ² . Ideally, it is 1~5mm ² . The area of one opening portion 11 may be 40% or less of the area of the base end of the aforementioned convex portion 10, preferably about 10 to 30%.

The number of opening portions 11 formed in one convex portion 10 is at least two, ideally 3-6, and more ideally 4 as shown in the example.

The opening portion 11, as shown in FIG. 2, is plural along an imaginary line L provided at a position near the base end portion of the convex portion 10 and parallel to the base end portion of the convex portion 10, with a predetermined interval therebetween. Configuration. Specifically, the aforementioned imaginary line L passing through the center of the plurality of openings 11... is relative to the radius of the convex portion 10, and is arranged at a position outside R/2, and ideally at a position outside 2R/3 . Since the opening portion 11 is provided at a position close to the proximal end portion side of the convex portion 10, body fluids can easily flow into the opening portion 11 from the outer side of the convex portion 10.

From the viewpoint of allowing body fluids diffused from the tip of the protrusion 10 to the base end to easily flow into the opening 11, the separation distance D between the opening 11 and the base end of the protrusion 10 is as large as possible It may be better to reduce it, and specifically, it is preferably 0.1 to 3 mm.

In this way, the aforementioned opening portion 11 is ideally formed at a position close to the base end of the convex portion 10 and not provided at the center portion of the convex portion 10. By being formed on the outer peripheral portion of the convex portion 10, the body fluid diffused from the outer side of the convex portion 10 into the convex portion 10 can more easily flow into the opening portion 11.

Furthermore, the sanitary napkin 1 of the present sanitary napkin 1 is provided with a compression portion 12 formed by compressing the surface sheet 3 and the second sheet 6 in a region other than the convex portion 10 and near the opening portion 11. With this compressed portion 12, the surface sheet 3 and the second sheet 6 are joined. In order not to hinder the penetration of bodily fluids between the surface sheet 3 and the second sheet 6, it is ideal to be joined only by the compression part 12, but it is also possible to intermittently apply a hot melt adhesive to it. Join firmly.

The compression portion 12 is not provided in the area where the protrusion 10 is formed, but only in the area where the surface sheet 3 and the second sheet 6 are in contact with each other and is relatively recessed compared to the protrusion 10.

The aforementioned compressed portion 12 is ideally formed by a concave portion that is recessed toward the non-skin side from the skin side of the surface sheet 3, but it can also be formed by a concave portion that is recessed toward the skin side from the non-skin side of the second sheet material 6, or a surface sheet The skin side surface of the material 3 and the non-skin side surface of the second sheet 6 are respectively formed by recessed portions.

The compression portion 12 is provided immediately outside the opening portion 11 while sandwiching the base end portion of the convex portion 10. That is, the opening portion 11 and the compression portion 12 sandwich the base end portion of the convex portion 10 and are provided adjacent to each other. The respective separation distances between the base end portion of the convex portion 10 and the opening portion 11 and the compression portion 12 may be almost the same, or any one of them may be smaller. The separation distance between the base end portion of the convex portion 10 and the opening portion 11 is relatively small, so that the body fluid diffused on the convex portion 10 can easily enter the opening portion 11, which is preferable.

As shown in FIG. 2, the shortest separation distance E between the opening portion 11 and the compression portion 12 is 0.2 to 10 mm, ideally 0.5 to 5 mm.

By providing the compression portion 12 adjacent to the opening portion 11, the body fluid absorbed by the surface sheet 3 will easily diffuse to the compression portion 12 due to the dense relationship of the fibers caused by the compression portion 12, and spread to this compression portion The body fluid 12 will quickly pass through the second sheet 6 through the aforementioned opening 11 adjacent thereto, and be absorbed by the absorbent body 4 on the lower layer side. Therefore, it can reduce the liquid residue on the surface and suppress the unpleasant skin stickiness.

Each opening portion 11 is provided with at least one compression portion 12 corresponding to it, but as shown in FIG. 2, the opening portions of the adjacent convex portions 10 and 10 are arranged at opposite positions 11 and 11 also use one compression portion 12 as the compression portion 12 corresponding to the opposite opening portions 11 and 11. That is, in the type example shown in FIG. 2, the two sides of a compression portion 12 respectively have openings 11 adjacent to each other.

In addition, there is no need to have one compression portion 12 corresponding to each opening portion 11, and a plurality of compression portions 12... may be arranged as shown in FIG. 4. In the case of arranging a plurality of compression parts 12..., the number is 2 to 5 for each opening 11, ideally 2 to 3, and 2 in the example of the figure.

The compression part 12 is arranged on the outer peripheral part of each convex part 10, and it is desirable not to arrange the compression part in the central part surrounded by four adjacent convex parts 10, 10.... If the compression part is arranged in this central part, the capillary action accompanying the difference in fiber density will cause body fluids to easily stay in the central part and make it difficult for body fluids to move to the lower layer side through the opening 11, which is not ideal . As shown in FIG. 2, in an example in which the convex portions 10 are arranged in a rhombus lattice shape aligned in an oblique direction, the aforementioned compression portions 12 are respectively arranged between the convex portions 10 and 10 adjacent in the oblique direction.

The planar shape of the aforementioned compressed portion 12 is arbitrary. In the example shown in FIG. 2, it is formed by a long oval in a direction orthogonal to the line connecting the centers of adjacent convex portions 10, 10, However, it may be circular as shown in FIG. 4, and may be formed in any shape such as an ellipse, a polygon, a star, and a heart.

The plane arrangement of the convex portion 10, the opening portion 11, and the compression portion 12 is arbitrary, but ideally, as shown in FIG. 2, in a plan view, the convex portion 10... is arranged in a rhombus lattice shape, and each convex portion Four openings 11, 11... are arranged in the interior of 10 to face the convex portions 10 adjacent to each other in an oblique direction, and at the same time, the convex portions 10 adjacent to each of the openings 11 are located close to each other in the oblique direction. In between, the compression section 12 is arranged separately. Thereby, it can be used as the adjacent convex part corresponding to the oblique direction. The compressed parts 12 of the opposite openings 11 and 11 in 10 and 10, and the body fluid flowing into the central part surrounded by the convex parts 10... will be affected by the thick fiber caused by the compressed part 12 It diffuses to the compressed part 12 and is absorbed by the absorbent body 4 on the lower layer side through the opening 11 close to the compressed part 12. Therefore, the liquid residue on the surface is extremely reduced, and the unpleasant skin stickiness will not be produced.

Next, a method of forming the convex portion 10, the perforated portion 11, and the compressed portion 12 on the surface sheet 3 and the second sheet 6 will be described.

In order to form the aforementioned convex portion 10, the opening portion 11, and the compression portion 12, a processing device 30 as shown in FIG. 5 is used. The aforementioned processing device 30 is a device provided with a first embossing roller 31, a second embossing roller 32, a third embossing roller 33, and a fourth embossing roller 34; the surface of the first embossing roller 31 has a surface corresponding to the convex The plurality of convex portions of the portion 10; the second embossing roller 32 is arranged opposite to the first embossing roller 31, and the surface is provided with a plurality of concave portions corresponding to the convex portion 10, and is provided with a plurality of convex portions corresponding to the compression portion 12 The aforementioned third embossing roller 33 and the second embossing roller 32 are disposed oppositely, and the surface is provided with a receiving portion of needle-like protrusions provided by the fourth embossing roller 34 described later; the fourth embossing roller 34 and this first The three embossing rollers 33 are arranged opposite to each other, and the surface is provided with a large number of needle-shaped protrusions corresponding to the aforementioned opening portion 11. The surface sheet 3 is passed between the first embossing roller 31 and the second embossing roller 32, and the engagement between the protrusions of the first embossing roller 31 and the recesses of the second embossing roller 32 is performed. The processing of the convex portion 10; at the same time, the second sheet 6 is passed between the third embossing roller 33 and the fourth embossing roller 34, by means of the needle-shaped protrusions of the fourth embossing roller 34 and the first The engagement between the receiving parts of the three embossing rollers 33 is performed to process the opening 11; then, the surface sheet 3 is held on the convex part of the second embossing roller 32, and the second sheet is 6 Maintain the state of the third embossing roller 33, and layer these surface sheets 3 And the second sheet 6, and in this layered state, pass between the second embossing roll 32 and the third embossing roll 33, and the compression portion 12 is performed by the convex portion of the second embossing roll 32 Processing.

(Examples of other types)

In the above-mentioned configuration example, the protrusions 10 are arranged in a rhombic lattice shape aligned in the oblique direction of the sanitary napkin 1, but they may also be arranged in the longitudinal direction and the width direction of the sanitary napkin 1. Positive lattice shape.

3: Surface sheet

10: Convex

11: Opening part

12: Compression section

Claims (5)

An absorbent article characterized by having a surface sheet and a second sheet arranged adjacent to the non-skin side of the surface sheet; On the aforementioned surface sheet, there are formed many convex parts bulging to the skin side; The second sheet inside the convex portion is formed with a plurality of openings penetrating in the thickness direction; A compression part formed by compressing the surface sheet and the second sheet is provided in a region other than the convex portion and at a position close to the opening portion. As for the absorbent article described in item 1 of the scope of patent application, the shortest separation distance between the opening and the compression is 0.5-10 mm. The absorbent article as described in claim 1 or 2, wherein the opening portion is provided along an imaginary position near the base end portion of the protrusion portion and parallel to the base end portion of the protrusion portion The lines are arranged in plural with a specified interval. The absorbent article described in any one of items 1 to 3 in the scope of the patent application, wherein the absorbent article is provided with one or more compression parts corresponding to each opening. As for the absorbent article described in any one of items 1 to 4 in the scope of the patent application, the area of the aforementioned opening is 0.01 to 8 mm ² .

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