WO2021060265A1

WO2021060265A1 - Absorbent article

Info

Publication number: WO2021060265A1
Application number: PCT/JP2020/035769
Authority: WO
Inventors: 美帆子倉持
Original assignee: 大王製紙株式会社
Priority date: 2019-09-26
Filing date: 2020-09-23
Publication date: 2021-04-01
Also published as: JP2021049272A; TW202112328A; TWI841785B; JP7361556B2

Abstract

[Problem] 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. [Solution] 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 article

The present invention relates to an absorbent article such as a sanitary napkin, a panty liner, an incontinence pad, etc., and more particularly to an absorbent article in which a large number of protrusions bulging toward the skin are formed on the surface sheet.

Conventionally, as a surface material of an absorbent article, an appropriate embossing pattern is imparted according to various purposes such as suppressing the feeling of dampness by reducing the contact area with the skin, or giving a texture and enhancing the tactile sensation. Is offered to the market. Further, as the surface material, those having appropriate openings formed according to various purposes such as increasing the absorption rate of body fluid and eliminating the liquid residue on the surface to eliminate the sticky feeling have been developed. Examples of this type include the following Patent Documents 1 and 2.

In the following Patent Documents 1 and 2, the first sheet and the second sheet are partially joined to form a large number of joints, and the first sheet has a convex portion on a portion other than the joint. Disclosed is a composite sheet in which a hole is formed in a non-joining portion with a first sheet facing the convex portion in the second sheet.

Japanese Patent No. 4863697 Japanese Patent No. 50994992

In a conventional absorbent article provided with a surface sheet having a large number of convex portions bulging toward the skin, the surface sheet penetrates into a region other than the convex portions in the thickness direction of the surface sheet in order to improve the liquid permeability of the surface sheet. It was forming an opening. However, in such a surface sheet, since the openings are exposed on the surface, there is a possibility that the openings come into direct contact with the skin surface when the convex portion is crushed by body pressure. At the periphery of the hole, burrs with the fiber ends protruding to the skin surface may be formed by piercing or pulling out the pin during the hole opening process, and the tip of this burr hits the skin surface, causing pain or itching to the wearer. There was a risk that the wearing feeling would be deteriorated. In addition, the body fluid absorbed by the absorber through the opening may return to the surface side, and the returned body fluid may come into contact with the skin and cause a sticky feeling.

Even when the convex portion is crushed by forming an opening portion in the non-joined portion of the first sheet facing the convex portion in the second sheet as in the composite sheet described in Patent Documents 1 and 2. The first sheet can prevent the openings from coming into direct contact with the skin surface, and can prevent the feeling of stickiness caused by the retreated body fluid.

However, in the composite sheets described in Patent Documents 1 and 2, the body fluid absorbed by the first sheet constituting the convex portion is diffused to the base end portion of the convex portion, and then the first sheet to the second sheet are used. The transferability from the second sheet to the lower absorber may be inferior, and the body fluid tends to collect at the joint between the first sheet and the second sheet, and the liquid may remain on the surface. was there.

Therefore, the main object of the present invention is to provide an absorbent article that prevents deterioration of the wearing feeling, reduces the liquid residue on the surface, and makes it difficult for the retreated body fluid to come into contact with the skin.

In order to solve the above problems, as a first aspect, a surface sheet and a second sheet arranged adjacent to the non-skin side of the surface sheet are provided.
A large number of protrusions bulging toward the skin are formed on the surface sheet, and the surface sheet has a large number of protrusions.
A plurality of openings penetrating in the thickness direction are formed on the second sheet inside the convex portion.
An absorbent article is provided in which a pressing portion for pressing the surface sheet and the second sheet is provided at a position in a region other than the convex portion and close to the opening portion.

In the first aspect, a large number of convex portions bulging toward the skin are formed on the surface sheet, and a plurality of openings penetrating in the thickness direction are formed on the second sheet inside the convex portions. Therefore, even if burrs are formed on the periphery of the perforated portion, the perforated portion does not come into direct contact with the skin, so that deterioration of the wearing feeling can be prevented. In addition, since the body fluid that has returned from the opening is unlikely to come into contact with the skin, an unpleasant sticky feeling can be suppressed.

Further, since the squeezed portion for squeezing the surface sheet and the second sheet is provided in a region other than the convex portion and close to the opening portion, the body fluid absorbed by the convex portion of the surface sheet can be collected. Due to the density of the fibers produced by the squeezed portion, the body fluid diffused in the squeezed portion easily diffuses into the squeezed portion, passes through the second sheet through the adjacent opening portion, and is absorbed by the absorber on the lower layer side. Will be done. Therefore, the liquid residue on the surface is reduced, and the unpleasant sticky feeling of the skin is suppressed.

As a second aspect, an absorbent article is provided in which the shortest separation distance between the opening portion and the pressing portion is 0.5 to 10 mm.

In the second aspect, by arranging the opening portion and the pressing portion at a predetermined separation distance, the body fluid diffused toward the pressing portion can easily flow into the opening portion and pass through the opening portion to the second. It becomes easy to move from the sheet to the lower absorber.

As a third aspect, a plurality of the holes are arranged at predetermined intervals along a virtual line parallel to the base end portion of the convex portion provided at a position closer to the base end portion side of the convex portion. Absorbent articles are provided.

In the third aspect, a plurality of the holes are arranged at predetermined intervals along a virtual line parallel to the base end portion of the convex portion provided at a position closer to the base end portion side of the convex portion. Therefore, the body fluid easily flows from the squeezed portion to the opened portion, and it is difficult for the fluid to remain on the surface.

As a fourth aspect, an absorbent article is provided in which one or more of the squeezed portions are provided corresponding to each opened portion.

In the fourth aspect, since at least one pressing portion is provided corresponding to each opening portion, the body fluid is surely transferred from the pressing portion to the opening portion, and the liquid residue on the surface can be reduced.

As a fifth aspect, an absorbent article having an area of the perforated portion of 0.01 to 8 mm ^{2 is provided.}

In the fifth aspect, the perforated portion is formed in an area within a predetermined range in order to secure the amount of body fluid passing through the perforated portion and suppress the reversion of the body fluid.

As described in detail above, according to the present invention, deterioration of wearing feeling can be prevented, liquid residue on the surface can be reduced, and bodily fluid that has retreated is less likely to come into contact with the skin.

It is a partially broken development view of the sanitary napkin 1 which concerns on this invention. It is an enlarged plan view of the surface of a sanitary napkin 1. FIG. 2 is a view taken along the line III-III in FIG. It is an enlarged plan view of the surface of the sanitary napkin 1 which concerns on the modification. It is sectional drawing which shows the processing apparatus 30.

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 FIG. 1, the sanitary napkin 1 according to the present invention has a liquid-impermeable back sheet 2 made of a polyethylene sheet or the like arranged on the non-skin side, and a menstrual blood while being arranged on the skin side. Absorption consisting of a liquid-permeable surface sheet 3 that rapidly permeates vaginal discharge (hereinafter collectively referred to as body fluid) and cotton-like pulp or synthetic pulp sandwiched between these two

sheets

2 and 3. A second sheet 6 between the body 4 and the surface sheet 3 and the absorber 4 adjacent to the non-skin side of the surface sheet 3 and having substantially the same shape as the surface sheet 3 and the skin contact surface side.

Side sheets

7 and 7 provided on both side portions over substantially the entire length in the longitudinal direction are provided, and around the absorber 4, the outer edges of the back surface sheet 2 and the front surface sheet 3 are provided at the upper and lower end edges thereof. The back surface sheet 2 and the side sheet are joined by an adhesive such as hot melt or a joining means such as a heat seal or an ultrasonic seal, and at both side edges thereof, they extend laterally from the absorber 4. A flap portion is formed in which the absorber 4 is joined by an adhesive such as hot melt or a joining means such as a heat seal or an ultrasonic seal. In order to maintain the shape of the absorber 4 and improve the diffusivity, the absorber 4 may be surrounded by an encapsulating sheet made of crepe paper, non-woven fabric or the like.

Hereinafter, the structure of the sanitary napkin 1 will be described in more detail.
As the back surface sheet 2, a sheet material having at least water-shielding property such as polyethylene is used, but it is desirable to use a sheet material having moisture permeability from the viewpoint of preventing stuffiness. The water-impervious / moisture-permeable sheet material has microporous properties obtained by melt-kneading an inorganic filler in an olefin resin such as polyethylene or polypropylene to form a sheet, and then stretching the sheet in the uniaxial or biaxial direction. Sheets are preferably used. One or more adhesive layers (not shown) are formed on the non-skin side surface (outer surface) of the back surface sheet 2 along the longitudinal direction of the napkin, and the sanitary napkin 1 is fixed to the underwear when attached to the body. It has become like. As the back surface sheet 2, a polylami non-woven fabric in which a plastic film and a non-woven fabric are laminated may be used.

Next, as the surface sheet 3, a perforated or non-perforated non-woven fabric is preferably used. The material fibers constituting the non-woven fabric can be olefin-based fibers such as polyethylene or polypropylene, synthetic fibers such as polyester-based and polyamide-based, recycled fibers such as rayon and cupra, and natural fibers such as cotton. A non-woven fabric obtained by an appropriate processing method such as a method, a spunbond method, a thermal bond method, a melt blown method, or a needle punching method can be used. Among these processing methods, the spunlace method is excellent in that it is rich in flexibility and drapeability, and the thermal bond method is excellent in that it is bulky and has high compression stability. When a large number of through holes are formed in the surface sheet 3, the body fluid is rapidly absorbed, and the dry touch property is excellent. The fibers of the non-woven fabric may be either long fibers or short fibers, but it is preferable to use short fibers in order to give the texture of the towel cloth. Further, in order to facilitate the embossing treatment, it is preferable to use an olefin fiber such as polyethylene or polypropylene having a relatively low melting point. Further, a core-sheath type fiber having a fiber having a high melting point as a core and a fiber having a low melting point as a sheath, a side-by-side type fiber, and a composite fiber of a split type fiber can also be preferably used.

The absorber 4 interposed between the back surface sheet 2 and the front surface sheet 3 is composed of, for example, cotton-like pulp and a water-absorbent polymer. The water-absorbent polymer is mixed in the pulp constituting the absorber, for example, as granular powder. Examples of the pulp include cellulose fibers such as chemical pulp and dissolved pulp obtained from wood, and artificial cellulose fibers such as rayon and acetate. It is preferably used in terms of price. The method for producing the absorber 4 is preferably made of laminated fiber pulp so as to be highly flexible, but it may be an air-laid absorber that can reduce the bulk. The absorber 4 may be surrounded by an encapsulating sheet (not shown) made of crepe paper, non-woven fabric, or the like in order to maintain its shape and improve diffusivity.

Further, synthetic fibers may be mixed with the absorber 4. As the synthetic fiber, for example, polyolefin-based such as polyethylene or polypropylene, polyester-based such as polyethylene terephthalate and polybutylene terephthalate, polyamide-based such as nylon, and copolymers thereof can be used, and these two types can be used. It may be a mixture. Further, composite fibers such as core-sheath type fibers having a high melting point fiber as a core and a low melting point fiber as a sheath, side-by-side type fibers, and split type fibers can also be used. In the case of hydrophobic fibers, it is desirable to use the synthetic fibers surface-treated with a hydrophilic agent so as to have an affinity for body fluids.

The hydrophilic second sheet 6 arranged between the surface sheet 3 and the absorber 4 may be any as long as it has hydrophilicity with respect to body fluids. Specifically, regenerated fibers such as rayon and cupra, and natural fibers such as cotton are used to make the material itself hydrophilic, or olefin-based, polyester-based, polyamide-based, etc. such as polyethylene or polypropylene are synthesized. Fibers obtained by surface-treating the fibers with a hydrophilizing agent to impart hydrophilicity can be used, and in addition, a porous plastic sheet can also be used. As will be described later, the second sheet 6 is integrally heat-sealed (embossed) with the front surface sheet 3 and the second sheet 6 in a state of being laminated adjacent to the back surface side (non-skin side) of the front surface sheet 3. It is joined by doing.

It is desirable that the second sheet 6 and the absorber 4 are joined by intermittently applying a hot melt adhesive to the entire surface. By adhering and adhering the second sheet 6 to the absorber 4, the body fluid absorbed by the second sheet 6 can be easily transferred to the absorber 4 quickly.

In the illustrated example, the width dimension of the surface sheet 3 is substantially the same as the width of the absorber 4, and only covers the absorber 4, and the outer side of the side sheet 7 is different from the surface sheet 3. Specifically, it is constructed by using a non-woven fabric material which has been appropriately treated with water repellent or hydrophilic according to the purpose of preventing menstrual blood or vaginal discharge from penetrating or enhancing the feeling of touch. The side sheet 7 is arranged.

As the side sheet 7, one made of natural fiber, synthetic fiber, recycled fiber or the like and formed by an appropriate processing method can be used, but preferably, the basis weight is increased in order to enhance the hiding property of the body fluid. It is better to use an enhanced non-woven fabric. Specifically, it is desirable to use a non-woven fabric produced with a basis weight of 13 to 23 g / m ² , and in order to reliably prevent the permeation of body fluids, silicon-based, paraffin-based, alkylchromic chloride-based water repellents, etc. A water-repellent treated non-woven fabric coated with is preferably used.

The side sheet 7 is adhered to the outer portion from the intermediate portion in the width direction from a predetermined inner position to the outer edge of the back surface sheet 2 by an adhesive such as hot melt, and the side sheet 7 and the back surface sheet 2 are bonded to each other. Side flaps are formed on both sides of the absorber 4 by the laminated sheet portion of the above, without the absorber 4 intervening. On the other hand, in the illustrated example, the inner side portion of the side sheet 7 is adhered to the absorber 4 side (the skin side surface of the surface sheet 3) in a state of being laminated on the skin side of the surface sheet 3, but in the width direction. By folding the folded portion into a foldable portion and disposing an elastic elastic member along the longitudinal direction in the folded portion, a three-dimensional gather that stands up on the skin side may be formed. Further, the sanitary napkin 1 of the illustrated example is not provided with wing-shaped flaps protruding laterally on both sides, but when attached to the shorts, the wing is folded back so as to wrap around the outside of the crotch portion of the shorts. The shaped flap may be provided so as to project to the side of the side flap portion.

[Convex part, open hole part, squeezed part]
In the sanitary napkin 1, as shown in FIGS. 2 and 3, a large number of

convex portions

10, 10 ... That bulge toward the skin are formed on the surface sheet 3. The convex portion 10 has a hollow inside, and a space portion is formed between the surface sheet 3 and the second sheet 6 in the convex portion 10. The region other than the convex portion 10 ... Is formed substantially flat and is a region relatively recessed as compared with the convex portion 10, and the non-skin side surface of this region is adjacent to the lower layer side. Is in contact with.

The planar shape of the bottom surface of the convex portion 10 may be circular as shown in the illustrated example, or may be elliptical, rectangular, polygonal, or the like. Further, the cross-sectional shape is a substantially semicircular dome shape in the illustrated example, but may be trapezoidal or rectangular. Preferably, as shown in the illustrated example, the bottom surface is circular and the cross-sectional shape is substantially semi-circular, which reduces the contact area with the skin, reduces rubbing, and increases the cushioning feeling. In addition to improving the skin contact, the body fluid absorbed by the top of the convex portion 10 easily diffuses toward the base end portion of the convex portion 10, and is absorbed by the absorber 4 through the opening portion 11 described later. It becomes easy to be done.

The size of the planar shape of the convex portion 10 can be appropriately determined from the viewpoint of enhancing the cushioning property and reducing the contact area with the skin, and specifically, the length of the sanitary napkin 1 in the longitudinal direction. It is preferable that the A is 2.0 to 10.0 mm and the length B of the sanitary napkin 1 in the width direction is 2.0 to 10.0 mm. Further, the height C of the convex portion 10 is preferably 0.5 to 5.0 mm.

By forming a large number of convex portions 10 ... On the surface sheet 3, the cushioning feeling is increased and the skin contact is softened, the contact area with the skin surface is reduced, and the rubbing with the skin surface can be reduced. ..

Further, in the sanitary napkin 1, a plurality of

holes

11, 11 ... Penetrating in the thickness direction are formed in the second sheet 6 inside the convex portion 10. The opening portion 11 is formed only in the second sheet 6 and is not provided in the surface sheet 3. Further, the opening portion 11 is formed only inside the convex portion 10, that is, only at the bottom portion (second sheet 6) of the portion where the surface sheet 3 bulges toward the skin side and a space portion is formed between the surface sheet 3 and the second sheet 6. The surface sheet 3 is not provided in a region other than the convex portion 10, that is, a portion where the surface sheet 3 is in contact with and laminated on the skin side of the second sheet 6.

By providing the opening portion 11, the body fluid quickly passes through the opening portion 11 through the opening portion 11 and moves to the absorber 4. Further, since the opening portion 11 is formed on the second sheet 6 inside the convex portion 10, the skin side of the opening portion 11 is covered with the surface sheet 3 constituting the convex portion 10 and comes into direct contact with the skin surface. It disappears. Therefore, even if a fiber end (burr) protruding toward the skin side is formed on the peripheral edge of the hole opening portion 11 by piercing or pulling out the pin during the hole opening process, the fiber end does not come into direct contact with the skin surface. , The fit is good.

^{The area of the opening portion 11 on the skin side surface of the second sheet 6 is 0.01 to 8 mm 2 in} order to ensure the liquid permeability of the opening portion 11 and suppress the return of the body fluid from the opening portion 11. , Preferably 1 to 5 mm ² . The area of one opening portion 11 is preferably 40% or less, preferably about 10 to 30% of the area of the base end portion of the convex portion 10.

The number of open holes 11 formed in one convex portion 10 is at least 2, preferably 3 to 6, and more preferably 4 as shown in the illustrated example.

As shown in FIG. 2, the opening portion 11 is predetermined along a virtual line L parallel to the base end portion of the convex portion 10 provided at a position closer to the base end portion side of the convex portion 10. Multiple are arranged at intervals. Specifically, the virtual line L passing through the centers of the plurality of opening portions 11 ... Is located outside R / 2, preferably outside 2R / 3, with respect to the radius R of the convex portion 10. Have been placed. Since the opening portion 11 is provided at a position closer to the base end portion side of the convex portion 10, body fluid easily flows into the opening portion 11 from the outside of the convex portion 10.

From the viewpoint of facilitating the flow of body fluid diffused from the tip of the convex portion 10 to the proximal end portion into the opening portion 11, the separation distance D between the opening portion 11 and the proximal end portion of the convex portion 10 is set as much as possible. It is preferable to make it small, and specifically, 0.1 to 3 mm is preferable.

As described above, it is preferable that the opening portion 11 is formed at a position closer to the base end portion of the convex portion 10 and is not provided at the central portion of the convex portion 10. By forming it on the outer peripheral portion of the convex portion 10, the body fluid diffused from the outside of the convex portion 10 toward the inside of the convex portion 10 easily flows into the opening portion 11.

Further, in the sanitary napkin 1, a pressing portion 12 that squeezes the surface sheet 3 and the second sheet 6 is provided at a position close to the opening portion 11 in a region other than the convex portion 10. The surface sheet 3 and the second sheet 6 are joined by the pressing portion 12. It is preferable that the surface sheet 3 and the second sheet 6 are joined only by the squeezed portion 12 so as not to hinder the permeation of body fluid, but in addition to this, by intermittently applying a hot melt adhesive or the like, the surface sheet 3 and the second sheet 6 are stronger. It may be joined to.

The squeezed portion 12 is not provided in the region where the convex portion 10 is formed, but only in a region that is relatively recessed as compared with the convex portion 10 in which the surface sheet 3 and the second sheet 6 are in contact with each other. It is provided.

The squeezed portion 12 is preferably formed by a recess in which the skin side surface of the surface sheet 3 is recessed toward the skin side, but the recessed portion in which the non-skin side surface of the second sheet 6 is recessed toward the skin side, or the surface sheet 3 is formed. The skin side surface and the non-skin side surface of the second sheet 6 may be formed by recessed recesses, respectively.

The squeezing portion 12 is provided immediately outside the opening portion 11 with the base end portion of the convex portion 10 interposed therebetween. That is, the opening portion 11 and the pressing portion 12 are provided close to each other with the base end portion of the convex portion 10 interposed therebetween. The separation distances between the base end portion of the convex portion 10 and the opening portion 11 and the pressing portion 12 may be substantially the same, or one of them may be reduced. It is preferable that the separation distance between the base end portion of the convex portion 10 and the opening portion 11 is relatively small because the body fluid diffused in the convex portion 10 easily enters the opening portion 11.

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

By providing the pressing portion 12 in the vicinity of the opening portion 11, the body fluid absorbed by the convex portion 10 of the surface sheet 3 diffuses toward the pressing portion 12 due to the density of the fibers by the pressing portion 12. The body fluid diffused in the squeezed portion 12 quickly passes through the second sheet 6 through the opening portion 11 in the vicinity thereof, and is absorbed by the absorber 4 on the lower layer side. Therefore, the liquid residue on the surface is reduced, and the unpleasant sticky feeling of the skin can be suppressed.

Each opening portion 11 is provided with at least one pressing portion 12 corresponding to the opening portion 11, and as shown in FIG. 2, the opening

portions

10 and 10 adjacent to each other are arranged at opposite positions. Regarding the

portions

11 and 11, one pressing portion 12 may also be used as the pressing portion 12 corresponding to the facing opening

portions

11 and 11. That is, in the embodiment shown in FIG. 2, the opening portions 11 are provided close to each other on both sides of one pressing portion 12.

Further, the pressing portion 12 corresponding to each opening portion 11 does not have to be one, and as shown in FIG. 4, a plurality of pressing portions 12 ... May be arranged. The number of the plurality of pressing portions 12 ... is 2 to 5, preferably 2 to 3, and 2 in the illustrated example for each opening portion 11.

It is preferable that the squeezed portion 12 is arranged on the outer peripheral portion of each convex portion 10, and the squeezed portion is not arranged in the central portion surrounded by the four adjacent

convex portions

10, 10, ... If the squeezed portion is arranged in the central portion, the body fluid tends to stay in the central portion due to the capillary action due to the difference in the density of the fibers, and the body fluid is less likely to move to the lower layer side through the opening portion 11, which is not preferable. As shown in FIG. 2, in a configuration example in which the convex portions 10 are arranged in a rhombic grid pattern in which the convex portions 10 are arranged in an oblique direction, the squeezed portions 12 are arranged between the

convex portions

10 and 10 adjacent in the oblique direction, respectively. There is.

The planar shape of the squeezed portion 12 is arbitrary, and in the example shown in FIG. 2, it is formed by an ellipse that is long in a direction orthogonal to the line connecting the centers of the adjacent

convex portions

10 and 10. As shown in, it may be circular, or it may be formed in any shape such as an ellipse, a polygon, a star, and a heart.

The planar arrangement of the convex portion 10, the opening portion 11 and the squeezing portion 12 is arbitrary, but as shown in FIG. 2, the convex portions 10 ... Are arranged in a rhombic grid pattern in a plan view, and each convex portion Inside the ten, four opening

portions

11, 11 ... Are arranged so as to face the convex portions 10 adjacent to each other in the oblique direction, and the positions are close to each opening portion 11 and adjacent to each other in the oblique direction. It is preferable that the squeezing portion 12 is arranged between the squeezing portion 10 and the matching convex portion 10. As a result, the squeezing portions 12 corresponding to the opening

portions

11 and 11 facing each other in the obliquely adjacent

convex portions

10 and 10 can also be used, and the front, rear, left and right sides are surrounded by the convex portions 10 ... The body fluid that has flowed in is diffused toward the squeezed portion 12 due to the influence of the density of the fibers by the squeezed portion 12, and is absorbed by the lower absorber 4 through the opening portion 11 adjacent to the squeezed portion 12. become. Therefore, the amount of liquid remaining on the surface is extremely reduced, and the unpleasant sticky feeling of the skin does not occur.

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

The processing device 30 shown in FIG. 5 is used to form the convex portion 10, the opening portion 11, and the pressing portion 12. The processing apparatus 30 is arranged on the surface of a first embossed roll 31 having a large number of convex portions corresponding to the convex portions 10 and facing the first embossed roll 31, and on the surface of the convex portions 10. A second embossed roll 32 provided with a large number of corresponding concave portions and a large number of convex portions corresponding to the squeezed portion 12, and a second embossed roll 32 which is arranged to face the second embossed roll 32 and has a surface surface to be described later. 4 The third emboss roll 33 provided with the receiving portion of the needle-shaped protrusion provided on the emboss roll 34, and a large number of the third emboss roll 33 which are arranged to face the third emboss roll 33 and which correspond to the opening portion 11 on the surface. It is a device provided with a fourth embossing roll 34 provided with a needle-like protrusion, and the first embossing is performed by passing the surface sheet 3 between the first embossing roll 31 and the second embossing roll 32. The convex portion 10 is processed by engaging the convex portion of the roll 31 with the concave portion of the second emboss roll 32, and the second sheet 6 is placed between the third emboss roll 33 and the fourth emboss roll 34. By engaging the needle-shaped protrusion of the fourth embossing roll 34 with the receiving portion of the third embossing roll 33, the opening portion 11 is processed, and then the surface sheet 3 is seconded. The surface sheet 3 and the second sheet 6 are laminated while being held in the recess of the emboss roll 32 and the second sheet 6 is held by the third emboss roll 33, and in the laminated state, the first sheet is described. By passing between the two embossing rolls 32 and the third embossing roll 33, the processing of the squeezed portion 12 is performed by the convex portion of the second embossing roll 32.

[Examples of other forms]
In the above embodiment, the convex portions 10 are arranged in a rhombic lattice pattern arranged diagonally in the sanitary napkin 1, but are arranged in a regular lattice pattern arranged in the longitudinal direction and the width direction of the sanitary napkin 1. You may.

1 ... Sanitary napkin, 2 ... Back sheet, 3 ... Front sheet, 4 ... Absorber, 6 ... Second sheet, 7 ... Side sheet, 10 ... Convex part, 11 ... Opening part, 12 ... Squeezing part

Claims

A surface sheet and a second sheet arranged adjacent to the non-skin side of the surface sheet are provided.
A large number of protrusions bulging toward the skin are formed on the surface sheet, and the surface sheet has a large number of protrusions.
A plurality of openings penetrating in the thickness direction are formed on the second sheet inside the convex portion.
An absorbent article characterized in that a squeezed portion obtained by squeezing the surface sheet and the second sheet is provided at a position in a region other than the convex portion and close to the opening portion.
The absorbent article according to claim 1, wherein the shortest separation distance between the opening portion and the pressing portion is 0.5 to 10 mm.
Claim 1, a plurality of the holes are arranged at predetermined intervals along a virtual line parallel to the base end portion of the convex portion provided at a position closer to the base end portion side of the convex portion. 2 Absorbent article according to any one.
The absorbent article according to any one of claims 1 to 3, wherein one or more of the squeezed portions are provided corresponding to each opened portion.
The absorbent article according to any one of claims 1 to 4, wherein the area of the perforated portion is 0.01 to 8 mm 2.