TWI841785B - Absorbent articles - Google Patents

Abstract

While preventing the wearer from feeling worse, it also reduces liquid residue on the surface and makes it difficult for the infiltrated body fluid to contact the skin.

The present invention provides a sanitary napkin 1 having a surface sheet 3 and a second sheet 6 disposed adjacent to the non-skin side of the surface sheet 3. On the surface sheet 3, a plurality of protrusions 10 bulging toward the skin side are formed. On the second sheet 6 inside the protrusions 10, a plurality of openings 11 penetrating in the thickness direction are formed. In an area outside the protrusions 10 and close to the openings 11, a compression portion 12 formed by compressing the surface sheet 3 and the second sheet 6 is provided. Since the openings 11 do not directly contact the skin, deterioration of the wearing feeling can be prevented, and body fluids that seep back from the openings 11 become less likely to contact the skin. Since the body fluid absorbed by the convex portion 10 is easily diffused to the compressed portion 12 due to the coarseness and density of the fibers, and moves to the lower layer side through the second sheet 6 via the adjacent opening 11, the liquid residue on the surface can be reduced.

Description

Absorbent articles

The present invention relates to absorbent articles such as sanitary napkins, pads, incontinence pads, etc., and more particularly to an absorbent article having a plurality of convex portions protruding toward the skin formed on a surface sheet.

For a long time, as the surface material of absorbent articles, the market has provided those with appropriate embossed patterns for various purposes such as reducing the contact area with the skin to suppress the wetness, or improving the touch while presenting the texture. In addition, as the aforementioned surface material, those with appropriate openings formed for various purposes such as increasing the absorption rate of body fluids and removing liquid residues on the surface to eliminate the wet and sticky feeling have also been developed. Such absorbent articles can be listed in the following patent documents 1 and 2, etc.

The following patent documents 1 and 2 disclose a composite sheet material, wherein a first sheet material and a second sheet material are partially joined to form a plurality of joints, and at the same time, the first sheet material has a convex portion formed in the portion other than the joints; and an opening portion is formed in the non-joined portion of the second sheet material opposite to the convex portion and the first sheet material.

[Prior Technical Literature]

【Patent Literature】

[Patent document 1] Japanese Patent No. 4863697

[Patent Document 2] Japanese Patent Gazette No. 5094992

Conventional absorbent articles having a surface sheet with a plurality of protrusions protruding toward the skin side have openings extending through the surface sheet in the thickness direction in areas other than the protrusions in order to improve the liquid permeability of the surface sheet. However, such a surface sheet has openings exposed on the surface, so when the protrusions are flattened by body pressure, there is a risk that the openings will directly contact the skin surface. The periphery of the openings may sometimes form burrs where the fiber ends protrude toward the skin surface due to the insertion and withdrawal of the needle during the opening process. The front end of the burrs may contact the skin surface, causing stinging or itching to the wearer, and deteriorating the wearing feel. In addition, the body fluid absorbed by the absorbent body from the openings may seep back to the surface, and the seeping body fluid may come into contact with the skin, causing a sticky feeling.

As described in the above-mentioned patent documents 1 and 2, the composite sheet has an opening formed on the non-joined portion of the first sheet on the second sheet opposite to the aforementioned convex portion. Even when the convex portion is flattened, the opening can be prevented from directly contacting the skin surface through the first sheet, thereby suppressing the sticky feeling caused by the re-seeping body fluid.

However, in the composite sheets described in the above-mentioned patent documents 1 and 2, the body fluid absorbed by the first sheet constituting the convex portion diffuses to the base end of the convex portion, and there is a situation where the mobility of the first sheet to the second sheet and the mobility of the second sheet to the absorbent body on the lower layer side are poor, and there is a risk that the body fluid is easily accumulated at the joint between the first sheet and the second sheet, and the liquid is left on the surface.

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

In order to solve the above-mentioned problem, the first aspect provides an absorbent article, which has a surface sheet and a second sheet disposed adjacent to the non-skin side of the surface sheet;

The aforementioned surface sheet is formed with a plurality of protrusions that bulge toward the skin side;

A plurality of openings are formed on the aforementioned second sheet material inside the aforementioned protrusion and pass through in the thickness direction;

In the area outside the aforementioned protrusion and close to the aforementioned opening, a compression portion formed by compressing the aforementioned surface sheet and the second sheet is provided.

In the first aspect, since the surface sheet has a plurality of protrusions protruding toward the skin, and the second sheet has a plurality of openings extending in the thickness direction inside the protrusions, the openings will not directly contact the skin even if burrs are formed around the openings, thereby preventing deterioration of the wearing feel. In addition, the body fluids that seep back from the openings are unlikely to contact the skin, thereby suppressing an unpleasant wet and sticky feeling.

Furthermore, since a compression part formed by compressing the surface sheet and the second sheet is provided in the area outside the convex part and near the opening part, the body fluid absorbed by the convex part of the surface sheet will easily diffuse to the compression part due to the coarse and dense fibers caused by the compression part, and 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 on the lower layer side. Therefore, the liquid residue on the surface is reduced, thereby suppressing the unpleasant wet and sticky feeling of the skin.

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

In the second aspect, the aforementioned opening portion and the compression portion are arranged at a specified separation distance, so that the body fluid diffused into the compression portion can easily flow into the opening portion and move from the second sheet to the absorbent body on the lower layer side through the opening portion.

The third aspect provides an absorbent article, wherein the aforementioned openings are arranged in plural at specified intervals along an imaginary line disposed near the base end of the aforementioned protrusion and parallel to the base end of the aforementioned protrusion.

In the third aspect, since the aforementioned openings are arranged in multiple numbers at specified intervals along an imaginary line disposed near the base end of the aforementioned protrusion and parallel to the base end of the aforementioned protrusion, body fluids can easily flow from the compression portion into the openings, making it difficult for liquid to remain on the surface.

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

In the fourth aspect, since at least one compression part is provided corresponding to each opening part, the body fluid can be reliably moved from the compression part to the opening part, and the 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 fifth aspect, in order to ensure the amount of body fluid passing through the opening and suppress the backflow of body fluid, the opening is formed in a specified area.

As described 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-seeded body fluid to contact the skin.

1: Sanitary napkins for menstrual use

2: Back sheet

3: Surface sheet

4: Absorber

6: Second sheet

7: Side sheet

10: convex part

11: Opening part

12: Compression section

【Figure 1】Partially broken and expanded view of the sanitary napkin 1 of the present invention.

【Figure 2】Enlarged plan view of the surface of sanitary napkin 1.

【Figure 3】III-III line arrow view of Figure 2.

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

[Figure 5] shows a cross-sectional view of the processing device 30.

Below, the implementation of the present invention will be described in detail with reference to the drawings.

(Basic structure of sanitary napkin 1)

As shown in FIG. 1 , the sanitary napkin 1 of the present invention comprises a liquid-impermeable back sheet 2, a liquid-permeable surface sheet 3, an absorbent body 4, a second sheet 6, and side sheets 7, 7; the liquid-impermeable back sheet 2 is disposed on the non-skin side and is made of a polyethylene sheet or the like; the liquid-permeable surface sheet 3 is disposed on the skin side and allows menstrual blood or secretions (hereinafter collectively referred to as body fluids) to pass through quickly; the absorbent body 4 is disposed between the two sheets 2, 3 and is made of cotton pulp or synthetic pulp or the like; the second sheet 6 is located between the surface sheet 3 and the absorbent body 4, adjacent to the non-skin side of the surface sheet 3. The side sheets 7, 7 are provided on both sides of the skin contact surface and cover almost the entire length of the long side direction; and the back sheet 2 and the outer edge of the top sheet 3 are joined by hot melt adhesive or heat sealing, ultrasonic sealing and other bonding means around the absorbent body 4 at the upper and lower edge portions thereof, and the back sheet 2 and the side sheets 7 extending laterally beyond the absorbent body 4 are joined by hot melt adhesive or heat sealing, ultrasonic sealing and other bonding means at the side edges thereof to form a wing portion without the absorbent body 4 interposed therebetween. In addition, in order to maintain the shape of the absorbent body 4 and improve its diffusivity, the absorbent body 4 may be surrounded by a covering sheet made of wrinkled paper or non-woven fabric.

The structure of the sanitary napkin 1 is further described below in detail:

The back sheet 2 is made of a sheet that is at least water-blocking, such as polyethylene, but it is ideal to use a sheet that is moisture-permeable from the perspective of preventing dampness. This water-blocking and moisture-permeable sheet is suitable for a microporous sheet obtained by forming the sheet by melt-kneading an inorganic filler in an olefin resin such as polyethylene or polypropylene, and then extending it in one or two axial directions. The non-skin side (outside) of the back sheet 2 is formed with one or more adhesive layers (not shown) along the long side of the sanitary napkin, so that the sanitary napkin 1 is fixed to the underwear when it is attached to the body. The back sheet 2 can also be made of a polyethylene laminated nonwoven fabric formed by laminating a plastic film and a nonwoven fabric.

Next, the surface sheet 3 is preferably a non-woven fabric with or without holes. The material fiber constituting the non-woven fabric may be synthetic fibers such as polyethylene or polypropylene olefins, polyesters, and polyamides, or may be regenerated fibers such as rayon or copper ammonium, or natural fibers such as cotton. The non-woven fabric may be obtained by appropriate processing methods such as water needle method, spunbond method, hot melt bonding method, melt spraying method, and needle rolling method. Among these processing methods, the advantages of the water needle method are rich softness and drape, and the advantages of the hot melt bonding method are fluffy and high compression recovery. When a plurality of through holes are formed in the surface sheet 3, body fluids are quickly absorbed, and dryness becomes better. The fiber of nonwoven fabric can be either long fiber or short fiber, but it is better to use short fiber because the ideal is to present a towel texture. In addition, in order to facilitate embossing, olefin fibers such as polyethylene or polypropylene with a lower melting point can be used. In addition, core-sheath type fibers with a high melting point fiber as the core and a low melting point fiber as the sheath, or composite fibers of parallel type fibers and split type fibers can also be appropriately used.

The absorbent body 4 between the back sheet 2 and the front sheet 3 is composed of, for example, cotton pulp and a water-absorbent polymer. The water-absorbent polymer is mixed into the pulp constituting the absorbent body in the form of granular powder, for example. The pulp may be composed of chemical pulp obtained from wood, cellulose fibers such as dissolved pulp, or artificial cellulose fibers such as rayon and acetate. Compared with broad-leaved tree pulp, coniferous tree pulp with a longer fiber length is more suitable in terms of function and price. The manufacturing method of the absorbent body 4 is preferably made of cellulose pulp in order to make it more flexible, but it may also be a shrinkable air-laid absorbent. The absorbent body 4 can be surrounded by a covering sheet (not shown) made of wrinkled paper or non-woven fabric in order to maintain its shape and improve its diffusion.

In addition, synthetic fibers may be mixed in the absorbent 4. The synthetic fibers may be, for example, polyolefins such as polyethylene or polypropylene, polyesters such as polyethylene terephthalate or polybutylene terephthalate, polyamides such as nylon, copolymers thereof, or mixtures of the two. In addition, composite fibers such as core-sheath fibers with high melting point fibers as cores and low melting point fibers as sheaths, or parallel fibers, split fibers, etc. may be used. In order to make the synthetic fibers have affinity for body fluids, in the case of hydrophobic fibers, it is ideal to use those that have been surface-treated with a hydrophilizing agent.

The hydrophilic second sheet 6 disposed between the surface sheet 3 and the absorbent 4 can be any sheet that is hydrophilic to body fluids. Specifically, it can be a material that is hydrophilic in itself due to the use of regenerated fibers such as rayon or copper ammonium, natural fibers such as cotton, or synthetic fibers such as polyethylene or polypropylene olefins, polyesters, and polyamides that are treated with a hydrophilic agent to impart hydrophilicity. In addition, a porous plastic sheet can also be used. This second sheet 6, as described later, is formed by thermally melting (embossing) the surface sheet 3 and the second sheet 6 as a whole in a state of being stacked adjacent to the back side (non-skin side) of the surface sheet 3.

The second sheet 6 and the absorbent body 4 are ideally joined by intermittently applying a hot melt adhesive throughout the entire body. By attaching the second sheet 6 to the absorbent body 4 and making it close, the body fluid absorbed by the second sheet 6 will be easily and quickly moved to the absorbent body 4.

The width of the surface sheet 3 is roughly the same as the width of the absorbent body 4 in the example shown in the figure. It only covers the absorbent body 4. The side sheet 7 different from the surface sheet 3 is provided on the outer side. Specifically, the side sheet 7 is made of non-woven fabric material with appropriate water-repellent or hydrophilic treatment for the purpose of preventing menstrual blood or secretions from penetrating or improving skin touch.

Such side sheets 7 can be made of natural fibers, synthetic fibers, or regenerated fibers by appropriate processing methods, but since it is desirable to improve the concealment of body fluids, a nonwoven fabric with a high basis weight can be used. Specifically, it is desirable to use a nonwoven fabric with a basis weight of 13 to 23 g/ ^m2 , and in order to reliably prevent body fluids from penetrating, a water-repellent nonwoven fabric coated with a silicone-based, wax-based, or alkyl chromium chloride-based water-repellent is suitable.

The side sheet 7 includes the portion outside the middle portion in the width direction from the specified inner position to the outer edge of the back sheet 2. The side wing portions without the absorbent body 4 are formed on both sides of the absorbent body 4 through the laminated sheet portions of the side sheet 7 and the back sheet 2 bonded by hot melt adhesive or the like. On the other hand, the inner side portion of the side sheet 7 is connected to the absorbent body 4 side (the skin side of the surface sheet 3) in the state of being layered on the skin side of the surface sheet 3 in the illustrated example, but it can also be formed into a three-dimensional hem standing up toward the skin side by folding it in the width direction and arranging an elastic stretch member along the long side direction at the folded portion. In addition, although the sanitary napkin 1 in the illustrated example does not have wing-shaped flaps protruding to the sides, it can also be provided with wing-shaped flaps that roll up the outside of the crotch portion of the underwear when it is installed in the underwear and fold back so that it protrudes toward the side of the aforementioned side flap portion.

(convex part, opening part, compressed part)

In the sanitary napkin 1 of the present invention, as shown in FIG2 and FIG3, a plurality of convex portions 10, 10... bulging toward the skin side are formed on the surface sheet 3. The inside of the convex portion 10 is hollow, and a space 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 relatively concave compared to the convex portion 10, and the non-skin side of this area is connected to the second sheet 6 adjacent to the lower layer side.

The bottom plane shape of the aforementioned convex portion 10 can be circular as shown in the example, or it can be elliptical, rectangular, polygonal, etc. In addition, the cross-sectional shape is a semicircular dome in the example shown, but it can also be a trapezoid or rectangular, etc. Ideally, as shown in the example, the bottom plane shape is circular, and the cross-sectional shape is a semicircular dome. In addition to reducing the contact area with the skin to reduce friction, it also increases the cushioning feeling to make the skin feel better. At the same time, the body fluid absorbed by the top of the convex portion 10 will be more easily diffused to the base end of the convex portion 10, and absorbed by the absorbent body 4 through the opening 11 described later.

The planar shape and size of the aforementioned protrusion 10 can be appropriately determined based on the perspectives of improving the cushioning property and reducing the contact area with the skin. Specifically, the ideal length A of the sanitary napkin 1 in the long side direction is 2.0~10.0mm, and the length B of the sanitary napkin 1 in the width direction is 2.0~10.0mm. In addition, the height C of the aforementioned protrusion 10 can be 0.5~5.0mm.

By forming a large number of protrusions 10 on the surface sheet 3, the cushioning feeling is increased to make the skin feel softer, while reducing the contact area with the skin surface, thereby reducing the friction between the skin and the skin.

In addition, in the sanitary napkin 1 of the present invention, a plurality of openings 11, 11, etc. are formed on the second sheet 6 in the inner part of the convex part 10, which pass through in the thickness direction. The opening 11 is formed only in the second sheet 6, and is not provided in the surface sheet 3. In addition, the opening 11 is formed only in the inner part of the convex part 10, that is, the bottom (second sheet 6) of the part where the surface sheet 3 bulges toward the skin side and forms a space with the second sheet 6, and is not provided in the area outside the convex part 10, that is, the part where the skin side of the second sheet 6 contacts and is layered with the surface sheet 3.

By providing the aforementioned opening 11, body fluid can quickly pass through the second sheet 6 through the opening 11 and move to the absorbent 4. In addition, since the aforementioned opening 11 is formed in the second sheet 6 inside the convex portion 10, the skin side of the aforementioned opening 11 is covered by the surface sheet 3 constituting the convex portion 10 and does not directly contact the skin surface. Therefore, even if the fiber end (burr) protruding toward the skin side is formed around the opening 11 due to the insertion and withdrawal of the needle during the hole processing, the fiber end will not directly contact the skin surface, so the wearing feeling is good.

In order to ensure the fluid permeability of the opening 11 and inhibit the backflow of body fluid from the opening 11, the area of the opening 11 on the skin side of the second sheet 6 can be 0.01-8 ^mm2 , preferably ^1-5 mm2. The area of one opening 11 can be less than 40% of the area of the base end of the protrusion 10, preferably about 10-30%.

The number of openings 11 formed in a convex portion 10 is at least 2, preferably 3 to 6, and more preferably 4 as shown in the example shown in the figure.

As shown in FIG. 2 , the aforementioned openings 11 are arranged in plurality at specified intervals along an imaginary line L disposed near the base end of the aforementioned protrusion 10 and parallel to the base end of the aforementioned protrusion 10. Specifically, the aforementioned imaginary line L passing through the center of the plurality of openings 11 is disposed at a position further outward than R/2, and ideally further outward than 2R/3, relative to the radius of the protrusion 10. Since the openings 11 are disposed at a position near the base end of the protrusion 10, body fluids can easily flow into the openings 11 from the outside of the protrusion 10.

From the perspective of making it easier for the body fluid diffused from the front end of the protrusion 10 to flow into the opening 11, the separation distance D between the opening 11 and the base end of the protrusion 10 is preferably as small as possible, specifically, 0.1~3mm is ideal.

Thus, the aforementioned opening 11 is ideally formed at a position close to the base end of the convex portion 10, rather than being provided at the center of the convex portion 10. By being formed at the outer periphery of the convex portion 10, the body fluid diffused from the outer side of the convex portion 10 to the inside of the convex portion 10 can more easily flow into the opening 11.

Furthermore, in the sanitary napkin 1 of the present invention, a compression portion 12 formed by compressing the surface sheet 3 and the second sheet 6 is provided in an area outside the convex portion 10 and close to the opening portion 11. The surface sheet 3 and the second sheet 6 are joined by the compression portion 12. In order not to hinder the penetration of body fluids, the surface sheet 3 and the second sheet 6 are ideally joined only by the compression portion 12, but can also be joined more firmly by intermittently applying a hot melt adhesive, etc.

The compression portion 12 is not disposed in the area where the convex portion 10 is formed, but is only disposed in the area where the surface sheet 3 is connected to the second sheet 6 and is relatively concave compared to the convex portion 10.

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

The compression part 12 is disposed on the outer side of the opening part 11 while sandwiching the base end of the protrusion 10. That is, the opening part 11 and the compression part 12 are disposed adjacent to each other while sandwiching the base end of the protrusion 10. The separation distances between the base end of the protrusion 10 and the opening part 11 and the compression part 12 can be almost the same, or any one of them can be smaller. It is better if the separation distance between the base end of the protrusion 10 and the opening part 11 is relatively small, so that the body fluid diffused in the protrusion 10 can easily enter the opening part 11.

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

By providing the aforementioned compression part 12 adjacent to the aforementioned opening part 11, the body fluid absorbed by the surface sheet 3 will easily diffuse to the compression part 12 due to the coarse and dense fibers caused by the aforementioned compression part 12, and the body fluid diffused to the compression part 12 will quickly pass through the second sheet 6 through the aforementioned opening part 11 adjacent thereto, and thus be absorbed by the absorbent body 4 on the lower layer side. Therefore, the liquid residue on the surface can be reduced, and the unpleasant wet and sticky feeling on the skin can be suppressed.

Each opening 11 is provided with at least one compression portion 12 corresponding thereto, but as shown in FIG2 , the openings 11, 11 arranged at opposite positions in the adjacent convex portions 10, 10 may also use one compression portion 12 as the compression portion 12 corresponding to the opposite openings 11, 11. That is, in the example shown in FIG2 , openings 11 are provided adjacent to each other on both sides of one compression portion 12.

In addition, the compression part 12 corresponding to each opening part 11 does not have to be one, and a plurality of compression parts 12 can be configured as shown in FIG. 4. When a plurality of compression parts 12 are configured, the number thereof is 2 to 5, preferably 2 to 3, and 2 in the example shown.

The compression part 12 is arranged at the outer periphery of each convex part 10. It is ideal not to arrange the compression part at the central part surrounded by four adjacent convex parts 10, 10... If the compression part is arranged at this central part, the capillary action accompanying the density difference of the fiber will cause the body fluid to be easily retained in the central part, and it will be difficult for the body fluid to move to the lower layer side through the opening part 11, which is not ideal. As shown in Figure 2, in the example in which the convex parts 10 are arranged in a rhombus grid in an oblique direction, the compression parts 12 are each arranged between the adjacent convex parts 10, 10 in the oblique direction.

The plane shape of the compression portion 12 is arbitrary. In the example shown in FIG. 2 , it is formed by a long oval in the direction perpendicular to the line connecting the centers of the adjacent convex portions 10, 10, but it can also be a circle as shown in FIG. 4, and can be formed by any shape such as an ellipse, a polygon, a star, a heart, etc.

The planar arrangement of the aforementioned protrusions 10, openings 11 and compression portions 12 is arbitrary, but ideally is as shown in FIG. 2 . In a plan view, the aforementioned protrusions 10...are arranged in a diamond grid, and four openings 11, 11...are arranged inside each protrusion 10 to face the protrusions 10 adjacent in the oblique direction. At the same time, compression portions 12 are respectively arranged at positions close to each opening 11 and between the protrusions 10 adjacent in the oblique direction. In this way, the compression part 12 corresponding to the openings 11, 11 in the adjacent convex parts 10, 10 in the oblique direction can be used, and the body fluid flowing into the central part surrounded by the convex parts 10 in the front, back, left and right directions will be diffused to the compression part 12 due to the influence of the coarse fiber density caused by the compression part 12, and will be absorbed by the absorbent body 4 on the lower layer side through the opening 11 close to the compression part 12. Therefore, the liquid residue on the surface is greatly reduced, and the unpleasant wet and sticky feeling on the skin will not be produced.

Next, the method of forming the convex portion 10, the opening portion 11 and the compressed portion 12 on the surface sheet 3 and the second sheet 6 is described.

In order to form the convex portion 10, the opening portion 11 and the compression portion 12, a processing device 30 as shown in FIG5 is used. The processing device 30 is a device having a first embossing roller 31, a second embossing roller 32, a third embossing roller 33, and a fourth embossing roller 34; the first embossing roller 31 has a plurality of convex portions corresponding to the convex portion 10 on its surface; the second embossing roller 32 is arranged opposite to the first embossing roller 31, and has a plurality of concave portions corresponding to the convex portion 10 on its surface. , and has a plurality of convex portions corresponding to the aforementioned compression portion 12; the aforementioned third embossing roller 33 is arranged opposite to the second embossing roller 32, and the surface has a receiving portion for the needle-like protrusions provided by the fourth embossing roller 34 described later; the aforementioned fourth embossing roller 34 is arranged opposite to the third embossing roller 33, and the surface has a plurality of needle-like 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 convex portion 10 is processed by the engagement between the convex portion of the first embossing roller 31 and the concave portion of the second embossing roller 32; at the same time, the second sheet 6 is passed between the third embossing roller 33 and the fourth embossing roller 34, and the needle-like protrusions of the fourth embossing roller 34 are engaged with the receiving portion of the third embossing roller 33. The aforementioned opening portion 11 is processed; then, the aforementioned surface sheet 3 is maintained on the convex portion of the second embossing roller 32, and the aforementioned second sheet 6 is maintained on the third embossing roller 33, and these surface sheets 3 and second sheets 6 are stacked, and in this stacked state, the aforementioned compression portion 12 is processed through the convex portion of the aforementioned second embossing roller 32 through the aforementioned second embossing roller 32 and the third embossing roller 33.

(Other examples)

In the above-mentioned embodiment, the protrusions 10 are arranged in a rhombus grid pattern arranged in the oblique direction of the sanitary napkin 1, but can also be arranged in a regular grid pattern arranged in the long side direction and the width direction of the sanitary napkin 1.

3: Surface sheet

10: convex part

11: Opening part

12: Compression section

Claims (4)

An absorbent article, characterized in that it has a surface sheet and a second sheet disposed adjacent to the non-skin side of the surface sheet; the surface sheet is formed with a plurality of convex portions bulging toward the skin side; the second sheet is formed with a plurality of openings penetrating in the thickness direction inside the convex portions; a compression portion formed by compressing the surface sheet and the second sheet is disposed in an area outside the convex portions and close to the opening portions; the opening portions are disposed in a plurality at specified intervals along an imaginary line disposed near the base end of the convex portion and parallel to the base end of the convex portion. For the absorbent article described in Item 1 of the patent application, the shortest separation distance between the opening portion and the compression portion is 0.5 to 10 mm. As described in item 1 of the patent application scope, the absorbent article is provided with one or more compression parts corresponding to each opening part. For example, the absorbent article described in item 1 of the patent application, wherein the area of the opening is 0.01 to 8 mm ² .

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