Patent Application
20210169707
The present invention relates to an absorbent article mainly used for products such as sanitary napkins, pantiliners, incontinence pads, and toiletries.
There is a known absorbent article where an absorber formed of, for example, cotton pulp is disposed between an impermeable back-side sheet such as a polyethylene sheet or a polyethylene-sheet-laminated nonwoven fabric and a permeable upper-side sheet such as a nonwoven fabric or a permeable plastic sheet.
A slim absorbent article including a thin absorber has such advantages that wearing discomfort can be reduced and that the bumps of the absorbent article are less noticeable from the outside of clothes when the absorbent article is worn (i.e., the absorbent article has less influence on the outer appearance), and is therefore popular in the market.
However, because the absorber is thin, the absorption capacity per unit area is small; and because the fluid retaining capacity in the thickness direction is low, the body fluid is likely to diffuse in the plane direction. For this reason, the related-art absorbent article has a disadvantage that the body fluid tends to leak particularly from a lateral edge of the absorber (side leakage). This in turn causes the wearer to feel insecure about the leakage and causes inconvenience such as having to replace absorbent articles frequently.
There is a known technology for preventing such side leakage in which compressed grooves are formed along the longitudinal direction on sides of an area corresponding to a body fluid discharge part of the wearer by denting the absorbent article from the skin side of the upper-side sheet toward the non-skin side, and there are many documents related to this technology. For example, Patent Document 1 discloses an absorbent article where a reference mark, which is a continuous or discontinuous contour line surrounding a predetermined area of a fluid receiving part, is provided in a position visible from the front side.
Also, Patent Document 2 discloses an absorbent article including an absorber where multiple compressed parts are formed by compressing an upper-side sheet and the absorber in the thickness direction of the absorbent article. The compressed parts include dot-shaped central compressed parts that are intermittently formed and disposed in a central area including the center of an excretion opening contact area facing an excretion opening of a wearer, and longitudinal compressed parts that are disposed outside of the central area in the width direction of the absorbent article and extend in the longitudinal direction of the absorbent article. The longitudinal compressed parts are depressed from the upper-side sheet toward the back-side sheet, and the central compressed parts are depressed from the back-side sheet toward the upper-side sheet.
[Patent Document 1] Japanese Unexamined Patent Application Publication No. 2003-126140
[Patent Document 2] Japanese Unexamined Patent Application Publication No. 2013-034525
However, because the absorbent article described in Patent Document 1 does not use a thin absorber, the absorbent article is likely to cause the wearer to feel discomfort and tends to influence the outer appearance. Also, although the absorbent article described in Patent Document 2 includes multiple dot-shaped central compressed parts, the central compressed parts are provided to prevent the upper-side sheet from being damaged by heat and to draw in a body fluid discharged from the wearer by the upper-side sheet, and do not have much effect in reducing the thickness of the absorber. Thus, the absorbent article of Patent Document 2 also has disadvantages similar to those of the absorbent article of Patent Document 1.
Thus, Patent Documents 1 and 2 are not directed to an absorbent article using a thin absorber, and therefore do not teach problems of a thin absorber that has a small absorption capacity per unit area and where a body fluid tends to diffuse in the plane direction and side leakage tends to occur.
A main object of the present invention is to provide a slim absorbent article that uses a thin absorber and where the diffusion of a body fluid in the plane direction is suppressed.
To solve the above problems, an aspect of the present invention provides an absorbent article including an absorber disposed between a permeable upper-side sheet and an impermeable back-side sheet. A core press depressed toward the back-side sheet is formed on at least a surface of the absorber facing the upper-side sheet such that the thickness of the absorber is reduced in the thickness direction, right and left compressed grooves are formed along the longitudinal direction of the absorbent article on at least the sides of an area corresponding to a body fluid discharge part of a wearer, and a high absorption part having a greater absorption capacity per unit area than other parts is formed at least between the right and left compressed grooves of the absorber.
As described above, the present invention makes it possible to suppress the diffusion of a body fluid in the plane direction in a slim absorbent article using a thin absorber and to particularly prevent side leakage of the body fluid.
Embodiments of the present invention are described below with reference to the drawings.
As illustrated in
H corresponding to a body fluid discharge part in the longitudinal direction. In the illustrated example, to keep the shape of the absorber 4 and improve its diffusivity, the absorber 4 is enveloped in an enveloping sheet 5 formed of, for example, crepe paper or a nonwoven fabric. However, the enveloping sheet 5 may be omitted. Also, although not shown, a second sheet formed of, for example, a hydrophilic nonwoven fabric and having substantially the same shape as the upper-side sheet 3 may be provided adjacent to the non-skin side of the upper-side sheet 3.
Below, the structure of the sanitary napkin 1 is described in more detail. The back-side sheet 2 may be made of a sheet material such as polyethylene having at least water impermeability. The back-side sheet 2 is preferably formed of a material having moisture permeability to prevent stuffiness. As the water-impermable and moisture-permeable sheet, a microporous sheet is preferably used. A microporous sheet is obtained by melt-mixing an inorganic filler with an olefin resin such as polyethylene or polypropylene to form a sheet, and by stretching the sheet uniaxially or biaxially. On the non-skin side (outer surface) of the back-side sheet 2, one or more streaks of adhesive layers (not shown) are formed along the napkin longitudinal direction to fix the sanitary napkin 1 to underwear when the sanitary napkin 1 is worn on the body. The back-side sheet 2 may also be made of a polyethylene-laminated nonwoven fabric (a nonwoven fabric laminated with a polyethylene film) that is formed by stacking a plastic film and a nonwoven fabric.
The permeable upper-side sheet 3 is preferably made of a porous or nonporous nonwoven fabric or a porous plastic sheet. Examples of fiber materials of the nonwoven fabric include synthetic fibers formed of olefin such as polyethylene or polypropylene, polyester, or polyamide, regenerated fibers such as rayon and cupra, and natural fibers such as cotton. The nonwoven fabric may be produced by any appropriate production method such as spunlacing, spunbonding, thermal bonding, melt-blowing, or needle punching. Among these production methods, spunlacing has an advantage in terms of flexibility and draping characteristics, and thermal bonding has an advantage in terms of bulkiness and compression restoration. When a large number of through holes are formed in the upper-side sheet 3, the sanitary napkin 1 can quickly absorb a body fluid and its dry touch property is improved. Although either long fibers or short fibers may be used for the nonwoven fabric, short fibers are preferably used to give a texture of a towel cloth. Also, to facilitate embossing, olefin fibers made of, for example, polyethylene or polypropylene with a relatively low melting point are preferably used. Also, bicomponent fibers may be used for the nonwoven fabric.
Examples of bicomponent fibers include a core-in-sheath fiber including a high-melting-point fiber as a core and a low-melting-point fiber as a sheath, a side-by-side fiber, and a split fiber.
As illustrated in the transverse sectional view of
The side nonwoven fabrics 7 may be produced using natural fibers, synthetic fibers, or regenerated fibers as a material according to any appropriate production method. A nonwoven fabric having a reduced basis weight and breathability is preferably used to reduce coarseness and prevent stuffiness. Specifically, a nonwoven fabric produced to have a basis weight of 13-23 g/m2 is preferably used. Also, a water-repellent nonwoven fabric coated with a silicone-based, paraffin-based, or alkylchromic chloride-based water repellent is preferably used to effectively prevent permeation of a body fluid.
As illustrated in
The absorber 4 disposed between the back-side sheet 2 and the upper-side sheet 3 is formed of, for example, pulp and a superabsorbent polymer. The superabsorbent polymer is mixed in the pulp constituting the absorber in the form of, for example, granular powder. The pulp may be made of cellulose fibers such as chemical pulp or dissolving pulp made from wood, or synthetic cellulose fibers such as rayon or acetate. In terms of the function and the price, softwood pulp with a long fiber length is more preferable than hardwood pulp.
The sanitary napkin 1 is a thin slim napkin using the absorber 4 with a low basis weight. The basis weight of the pulp is 50-300 g/m2, and is preferably 80-220 g/m2. The basis weight of the superabsorbent polymer is 30-180 g/m2, and is preferably 50-160 g/m2. The basis weights of the pulp and the superabsorbent polymer are not necessarily constant, and may be changed depending on the portions of the absorber. For example, as described later in detail, a high absorption part 15 where the basis weights of the pulp and the superabsorbent polymer are high may be formed in an area corresponding to the area H that corresponds to the body fluid discharge part of the wearer.
Synthetic fibers may also be added to the absorber 4. The synthetic fibers may be made of, for example, polyolefin such as polyethylene or polypropylene, polyester such as polyethylene terephthalate or polybutylene terephthalate, polyamide such as nylon, or a copolymer of these polymers. Also, a mixture of two types of synthetic fibers may be used. Also, bicomponent fibers may be used. Examples of bicomponent fibers include a core-in-sheath fiber including a high-melting-point fiber as a core and a low-melting-point fiber as a sheath, a side-by-side fiber, and a split fiber. When using hydrophobic fibers as the synthetic fibers, the hydrophobic fibers are preferably surface-treated with a hydrophilic agent to have an affinity to the body fluid.
As illustrated in
When the thickness of the absorber 4 before forming the core press 10 is t0 and the thickness of the absorber 4 after forming the core press 10 is t, the ratio t/t0 of the thickness after being reduced by forming the core press 10 is preferably about 1/10 to about 7/10. If the ratio is less than 1/10, the absorber becomes hard and the wearing comfort is reduced. On the other hand, if the ratio is greater than 7/10, the effect of compression by the core press 10 becomes small and the thickness of the absorber 4 increases. The ratio may be changed by adjusting, for example, the compression depth of the core press 10, the interval between adjacent core presses, and the plane pattern of the core press 10.
In the illustrated example, the core press 10 is formed by compressing the absorber 4 only from the skin side (the surface facing the upper-side sheet 3). As a result, U-shaped recesses are formed on the skin side of the absorber 4, and the non-skin side (the surface facing the back-side sheet 2) of the absorber 4 becomes substantially flat. Such processing may be performed by passing the absorber through a gap between a patterned roller having multiple protrusions on its surface and an anvil roller having a flat surface. On the other hand, although not shown, U-shaped recesses may be formed on both of the skin side and the non-skin side of the absorber 4 by compressing the absorber 4 from both of the skin side and the non-skin side. Such processing may be performed by passing the absorber 4 through a gap between a first patterned roller having multiple protrusions on its surface and a second patterned roller having protrusions formed at positions corresponding to the protrusions of the first patterned roller. When at least the skin side of the absorber 4 is compressed, a body fluid entering through the upper-side sheet 3 flows into the recesses of the core press 10, can smoothly diffuse along the core press 10, and can be absorbed by the absorber 4 while diffusing.
As illustrated in
The core press 10 can be formed in any pattern as long as the thickness of the absorber 4 can be reduced in the thickness direction. However, as illustrated in
The core press 10 preferably includes a grid-like pattern composed of first linear pressed parts 11a that are inclined to one side in the width direction and arranged in the longitudinal direction at predetermined intervals and second linear pressed parts 11b that are inclined to the other side in the width direction to intersect the first linear pressed parts 11a and arranged in the longitudinal direction at predetermined intervals.
Forming the core press 10 in a grid-like pattern makes it possible to more effectively reduce the thickness of the absorber 4, and to more effectively reduce the wearing discomfort and suppress the influence on the outer appearance. The first linear pressed parts 11a and the second linear pressed parts 11b, respectively, are preferably arranged at substantially the same interval such that a large number of rectangular cells having a square or rhombic shape and defined by the linear pressed parts 11a and 11b are arranged. Although the substantially rectangular cells surrounded by the linear pressed parts 11a and 11b are not directly compressed, their thickness is influenced by the linear pressed parts 11a and 11b and is made smaller than the original thickness.
The intersecting angle between the first linear pressed parts 11a and the second linear pressed parts 11b is substantially a right angle in the illustrated example. However, the intersecting angle may be between about 30 degrees and about 150 degrees. The first linear pressed parts 11a and the second linear pressed parts 11b are preferably inclined with respect to the width direction of the sanitary napkin 1. With this configuration, when the right and left legs are moved back and forth during, for example, walking and a force is applied to the sanitary napkin 1 in a torsional direction due to a pressure from the inside of the groin, the absorber 4 can smoothly deform in an oblique direction along the linear pressed parts 11a and 11b and can smoothly follow the movement of the body. Also, because a body fluid flows in the width direction of the sanitary napkin 1 along the linear pressed parts 11a and 11b, this configuration can prevent side leakage compared with a case where linear pressed parts are formed to extend in a direction parallel to the width direction. To facilitate deformation in the oblique direction and prevent side leakage as described above, the linear pressed parts 11a and 11b are preferably inclined at an angle greater than or equal to 30 degrees with respect to the width direction of the sanitary napkin 1.
To effectively reduce the thickness of the absorber 4, as illustrated in the
To effectively reduce the thickness of the absorber 4, as illustrated in
The planar shape of each cell defined by the core press 10 may be a polygon having five or more sides instead of a quadrangle such as a square or a rhombus described above. In the above embodiment, the linear pressed parts 11a and 11b are formed as continuous lines. However, the linear pressed parts 11a and 11b may be formed as discontinuous lines composed of multiple dots arranged at intervals.
As illustrated in
Similarly to the core press 10, the compressed grooves 12 may be composed of U-shaped recesses that are formed only on the skin side of the absorber 4 by compressing the absorber 4 only from the skin side, or composed of U-shaped recesses formed on both of the skin side and the non-skin side of the absorber 4 by compressing the absorber 4 from the skin side and the non-skin side.
In the embodiment illustrated in
As a variation, as illustrated in
As illustrated in the
The multiple longitudinal compressed grooves 12a are preferably arranged concentrically around substantially the center of the area H corresponding to the body fluid discharge part of the wearer, and preferably have substantially parallel curved shapes that protrude outward. To prevent the diffusion of the body fluid in the width direction, the compressed grooves 12a in the innermost positions in the width direction are preferably positioned on the sides of an area that substantially corresponds to the vaginal opening of the wearer.
In this case, the longitudinal compressed groove 12a disposed in the laterally-outer position preferably extends in the forward and backward longitudinal directions longer than the longitudinal compressed groove 12a disposed in the laterally-inner position. With this configuration, the body fluid diffusing outward in the width direction around an end of the longitudinal compressed groove 12a disposed in the laterally-inner position can be blocked by the longitudinal compressed groove 12a disposed in the laterally-outer position, and the diffusion of the body fluid in the laterally-outward direction can be prevented more reliably.
Also, as illustrated in
As illustrated in
As illustrated in
The non-pressed part 14 is formed around the entire periphery of each compressed groove 12 so that the compressed groove 12 and the core press 10 are not directly connected to each other. The width of the non-pressed part 14 is preferably between 0.5 mm and 5 mm to ensure its function as a body fluid buffer zone and prevent the thickness of the absorber 4 from increasing.
The non-pressed parts 14 are preferably formed also around the longitudinal compressed grooves 12a and the lateral compressed grooves 12b. Hereinafter, the term “compressed groove(s) 12” may also encompass the longitudinal compressed grooves 12a and the lateral compressed grooves 12b.
As illustrated in
In forming the core press 10 and the compressed grooves 12 on the absorber 4, the core press 10 and the compressed grooves 12 may be simultaneously formed using a patterned roll on which protrusions corresponding to the core press 10 and the compressed grooves 12 are formed. Alternatively, the compressed grooves 12 may be formed after forming the core press 10.
In the sanitary napkin 1, as illustrated in
The high absorption part 15 has a greater absorption capacity per unit area than other parts. Providing the high absorption part 15 in the area H corresponding to the body fluid discharge part of the wearer makes it possible to sufficiently absorb and retain a discharged body fluid by the high absorption part 15, and makes it possible to suppress the body fluid from diffusing out of the high absorption part 15. This configuration also makes it possible to prevent the area surrounded by the compressed groove 12 from becoming out of capacity (saturated) and prevent the body fluid from flowing and diffusing out of the area.
The absorption capacity per unit area is measured as described below.
absorption capacity per unit area (g/cm2)=((weight after dehydration (g)−(weight before immersion in liquid (g))/area of part (cm2))
The absorption capacity per unit area of the high absorption part 15 measured as described above is preferably between 0.3 g/cm2 and 2.0 g/cm2, and preferably between 0.3 g/cm2 and 1.0 g/cm2. Also, the absorption capacity per unit area of the high absorption part 15 is 1.5 to 5 times, preferably 1.5 to 2.5 times, greater than the absorption capacity per unit area of other parts.
The absorption capacity per unit area may be increased, for example, by increasing the basis weight of the pulp and the superabsorbent polymer or by changing the type of the superabsorbent polymer to one having a greater absorption amount. In the case where the basis weight of the pulp and the superabsorbent polymer is increased, if only the basis weight of the superabsorbent polymer is increased, the corresponding area becomes hard, and the wearer is likely to feel the graininess of the superabsorbent polymer. Therefore, it is preferable to also increase the basis weight of the pulp by substantially the same ratio as the increased ratio of the superabsorbent polymer. The increased basis weight of the pulp and the superabsorbent polymer in the high absorption part 15 is 1.5 to 5 times, preferably 1.5 to 2.5 times, greater than that of other areas. As a result of increasing the basis weight of the pulp and the superabsorbent polymer, the thickness of the high absorption part 15 increases compared to other areas. However, because the core press 10 is also formed in the high absorption part 15, even if the thickness slightly increases, the wearing comfort is not influenced. Specifically, although it varies depending on the thickness of the entire absorber 4, the difference between the thickness of the high absorption part 15 and the thickness of other areas is preferably less than or equal to 1 mm.
When the absorption capacity per unit area is increased by increasing the basis weight of the pulp and the superabsorbent polymer, the rigidity of the high absorption part 15 becomes relatively high and the rigidity of other parts becomes relatively low. This achieves an effect that while the area H corresponding to the body fluid discharge part of the wearer is in close contact with the body, other parts can smoothly follow the movement of the body.
When the absorption capacity per unit area is increased by changing the types of superabsorbent polymers, a superabsorbent polymer with a large water absorption amount measured according to JIS K7223 may be used for the high absorption part 15.
When multiple longitudinal compressed grooves 12a are formed at least on each side of the area H corresponding to the body fluid discharge part of the wearer as illustrated in
In the sanitary napkin 1 configured as described above, the thickness of the absorber 4 is reduced in the thickness direction by forming the core press 10 on the absorber 4. Thus, the sanitary napkin 1 is made as a slim napkin that does not much affect the outer appearance. However, depending on the use condition, the body fluid may diffuse along the core press 10 and may particularly leak from the lateral edges. For this reason, the left and right compressed grooves 12 are formed along the longitudinal direction of the sanitary napkin 1 on at least the sides of the area H corresponding to the body fluid discharge part of the wearer to block the body fluid diffusing toward the lateral edges of the absorber 4. Also, the high absorption part 15 with an absorption capacity per unit area higher than that of other parts is formed at least between the right and left compressed grooves 12 of the absorber 4 so that a discharged body fluid can be prevented from diffusing in the plane direction and can be absorbed and retained in the absorber 4.
In the above embodiment, as illustrated in
Also, as illustrated in
Providing the compressed grooves 13 formed by compressing the upper-side sheet 3 and the absorber 4 together at positions outside of the compressed grooves 12 formed by compressing only the absorber 4 makes it possible to further improve the leakage prevention effect.
Preferred embodiments of the present invention are described below as appendices.
According to an embodiment of Appendix 1, an absorbent article includes an absorber disposed between a permeable upper-side sheet and an impermeable back-side sheet. A core press depressed toward the back-side sheet is formed on at least a surface of the absorber facing the upper-side sheet such that a thickness of the absorber is reduced in a thickness direction, right and left compressed grooves are formed along the longitudinal direction of the absorbent article on at least the sides of an area corresponding to a body fluid discharge part of a wearer, and a high absorption part having a greater absorption capacity per unit area than other parts is formed at least between the right and left compressed grooves of the absorber.
In the embodiment of Appendix 1, the thickness of the absorber is reduced in the thickness direction by forming the core press on the absorber. In an absorber with a core press, the body fluid may diffuse along the core press where the density of fibers is increased by compression, and leakage (side leakage) from the lateral edges may occur depending on the use condition. However, in the present invention, right and left compressed grooves are formed along the longitudinal direction of the absorbent article on at least the sides of the area corresponding to the body fluid discharge part of the wearer to block the diffusion of the body fluid to the lateral edges of the absorber, and a high absorption part having a greater absorption capacity per unit area than other parts is formed at least between the right and left compressed grooves of the absorber. This configuration makes it possible to prevent the diffusion of a discharged body fluid in the plane direction and to absorb and retain the body fluid in the absorber.
Accordingly, this embodiment makes it possible to provide a slim absorbent article that uses a thin absorber and where the diffusion of a body fluid in the plane direction, particularly in the width direction, is suppressed.
An embodiment of Appendix 2 provides the absorbent article described in Appendix 1 where the compressed grooves are formed to surround the area corresponding to the body fluid discharge part of the wearer.
According to the embodiment of Appendix 2, the compressed grooves are formed to surround the area corresponding to the body fluid discharge part of the wearer. This embodiment makes it possible to suppress the diffusion in the longitudinal direction in addition to the diffusion in the width direction, and thereby makes it possible to reliably prevent the leakage from the edges of the absorber.
An embodiment of Appendix 3 provides the absorbent article described in Appendix 1 or 2 where multiple compressed grooves are formed at least on each side of the area corresponding to the body fluid discharge part of the wearer, and the absorption capacity per unit area of the absorber in an inner area inside of the compressed grooves is greater than the absorption capacity per unit area of the absorber in an outer area outside of the compressed grooves.
In the embodiment of Appendix 3, when multiple compressed grooves are formed on each side, the absorption capacity per unit area is changed gradually in areas bordered by the compressed grooves. This configuration makes it possible to further suppress the diffusion of the body fluid and more reliably prevent the side leakage. The absorption capacity per unit area can be adjusted by changing the basis weight of the pulp and the superabsorbent polymer or by changing the types of superabsorbent polymers.
An embodiment of Appendix 4 provides the absorbent article described in any one of Appendices 1-3 where the core press includes multiple linear pressed parts that are formed between edges of the absorber and are continuous or omitted in the compressed grooves.
In the embodiment of Appendix 4, the core press includes the linear pressed parts formed between the edges of the absorber. This makes it possible to reliably reduce the thickness of the absorber.
An embodiment of Appendix 5 provides the absorbent article described in Appendix 4 where the core press includes multiple first linear pressed parts that are arranged at predetermined intervals in the longitudinal direction and inclined to one side in a width direction, and multiple second linear pressed parts that are arranged in the longitudinal direction at predetermined intervals, inclined to another side in the width direction, and intersect the first linear pressed parts.
In the embodiment of Appendix 5, the core press is formed in a grid-like pattern including the first linear pressed parts and the second linear pressed parts inclined in different directions. With this configuration, the body fluid diffuses along the first linear pressed parts and the second linear pressed parts. This in turn makes it possible to suppress the diffusion in the width direction, and enables the absorber to smoothly deform in an oblique direction along the first linear pressed parts and the second linear pressed parts and to smoothly follow the movement of the body when the absorber is twisted.
An embodiment of Appendix 6 provides the absorbent article described in Appendix 4 or 5 where the groove width of the compressed grooves is greater than the groove width of the linear pressed parts.
In the embodiment of Appendix 6, the groove width of the compressed grooves is made greater than the groove width of the linear pressed parts so that the body fluid reaching the compressed grooves flows along the compressed grooves instead of the core press disposed adjacent to the outer side of the compressed grooves and the diffusion of the body fluid to the outside of the compressed grooves is suppressed.
An embodiment of Appendix 7 provides the absorbent article described in any one of Appendices 1-6 where front and rear compressed grooves are formed along the width direction of the absorbent article in front of and behind the area corresponding to the body fluid discharge part of the wearer.
In the embodiment of Appendix 7, the front and rear compressed grooves are formed along the width direction of the absorbent article in front of and behind the area corresponding to the body fluid discharge part of the wearer to suppress the diffusion of the body fluid in the longitudinal direction and improve the effect of preventing leakage from the front and rear ends of the absorber. Also, the front and rear compressed grooves function as bending guide lines that guide the absorber to deform along the front and rear round portions of the body.
An embodiment of Appendix 8 provides the absorbent article described in any one of Appendices 1-7 where the core press is omitted in positions where the core press overlaps the compressed grooves and in a vicinity of the compressed grooves such that a non-pressed part with a predetermined width is formed around each of the compressed grooves.
In the embodiment of Appendix 8, the non-pressed part is formed around each compressed groove so that the body fluid diffused along the core press is temporarily retained in the non-pressed part before reaching the compressed groove. This in turn makes it possible to lower the diffusion rate of the body fluid and enables the body fluid to smoothly diffuse along the compressed groove.
The present application is based on and claims priority to Japanese Patent Application No. 2018-038352 filed on Mar. 5, 2018, the entire contents of which are hereby incorporated herein by reference.
1 . . . sanitary napkin, 2 . . . back-side sheet, 3 . . . upper-side sheet, 4 . . . absorber, 5 . . . enveloping sheet, 7 . . . side nonwoven fabric, 10 . . . core press, 11 . . . linear pressed part, 11a . . . first linear pressed part, 11b . . . second linear pressed part, 12 . . . compressed groove, 12a . . . longitudinal compressed groove, 12b lateral compressed groove, 13 . . . compressed groove, 14 . . . non-pressed part, 15 . . . high absorption part, 16 . . . central pressed part
| Number | Date | Country | Kind |
|---|---|---|---|
| 2018-038352 | Mar 2018 | JP | national |
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/JP2019/006006 | 2/19/2019 | WO | 00 |
