JP6911265B2 - Hydrolytic absorbent articles for men - Google Patents

Description

The present invention relates to hydrolyzable absorbent articles for men.

Generally, an absorbent article is composed of a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorbent body arranged between the top sheet and the back sheet, whereby urine and the like can be treated. Body fluid is absorbed by the absorber through the top sheet. This absorbent article has various absorption amounts depending on the amount of body fluid discharged under the assumed usage conditions. Of these, light incontinence liners, light incontinence pads, and the like are known to absorb a relatively small amount of body fluid.

By the way, when disposing of absorbent articles for men for light incontinence, the disposal site is often in need. For example, when disposing of absorbent articles for women, they are often disposed of in the trash can normally installed in women's toilets. On the other hand, men's toilets often do not have a trash can, and when disposing of absorbent articles for men, there are often problems with the disposal location.

Therefore, in the case of a light incontinence liner or a light incontinence pad, there is also known a product that is composed of a water-decomposable material and can be disposed of in a toilet. These hydrolyzable absorbent articles can also be disposed of in the toilet after use, and have the advantage of easy post-treatment after use. Examples of such a water-decomposable absorbent article include, in Patent Document 1, an absorbent article having a top sheet, a back sheet, and an absorber interposed between the top sheet and the back sheet. , The top sheet and the back sheet are bonded in a discontinuous bonding pattern by thermal bonding means in the main absorption region of the absorbent article, and the absorber and the top sheet are bonded in a discontinuous bonding pattern in this absorption region. Disclosed are hydrolyzable absorbent articles in which the area of the entire site joined by is 1% to 50% of this absorption region.

JP-A-2002-035026

However, the conventional hydrolyzable and absorbent articles, including the hydrolyzable absorbent article described in Patent Document 1, do not always have sufficient dispersibility / hydrolyzability when disposed of in the toilet, and may cause clogging of the toilet. There was sex. On the other hand, when the water-decomposable article is composed of only a material having good water-decomposability, the water-decomposable article may absorb the body fluid and then wet the clothes. Therefore, the present invention has been made in view of the above problems, and is a water-decomposable absorbent article having better dispersibility / water-decomposability in water and effectively preventing body fluids from wetting clothes. The purpose is to provide.

The inventors of the present invention have conducted diligent research in order to solve the above problems. As a result, it has an absorber composed of a laminate of a plurality of sheets of water-decomposable crepe paper, a body fluid permeation prevention film, and an outer crepe paper having an embossed pattern covering them, and has a predetermined looseness. It has been found that the absorbent article can solve the above-mentioned problems, and the present invention has been completed. Specifically, the present invention provides the following.

(1) The first aspect of the present invention is a hydrolyzable absorbent article for men, in which an absorber composed of a laminate of a plurality of hydrolyzable crepe papers and a body fluid permeation located on the clothing side of the absorber. The water-decomposable crepe paper, which constitutes the outer surface of the water-decomposable absorbent article, covers the absorber and the body liquid permeation prevention film, and has a water-decomposable outer crepe paper containing water-soluble polymer fibers. The result of the JIS P 4501 looseness test for each of the body liquid permeation prevention film and the outer crepe paper is within 100 seconds, and the outer crepe paper is a water-decomposable absorbent article having an embossed pattern.
(2) In the water-decomposable absorbent article according to (1), the embossed pattern of the outer crepe paper has an embossed pattern depth of 0.5 mm or more and 1.5 mm or less, and the area of the embossed pattern is 0. .5mm ² / FOB 2.5mm is ² / piece or less, the area ratio of the embossed pattern may be 60% or less than 5%.
(3) In the hydrolyzable absorbent article according to (1) or (2), the hydrolyzable crepe paper constituting the absorber has a basis weight of 16 g / m ² or more and 23 g / m ² or less per sheet. There may be.
(4) In the hydrolyzable absorbent article according to any one of (1) to (3), the basis weight of the outer crepe paper may be 30 g / m ² or more and 50 g / m ² or less.
(5) In the hydrolyzable absorbent article according to any one of (1) to (4), the water-soluble polymer contained in the outer crepe paper may be carboxymethyl cellulose fiber or polyvinyl alcohol fiber.
(6) In the water-decomposable absorbent article according to any one of (1) to (5), the body fluid permeation prevention film may be a polyvinyl alcohol film.
(7) The hydrolyzable absorbent article according to any one of (1) to (6) may have a substantially square shape having a side of 120 mm or more and 150 mm or less.

In the water-decomposable absorbent article of the present invention, since the absorber and the outer surface are made of water-decomposable crepe paper, even when it is disposed of in a toilet or the like, it is quickly dispersed / hydrolyzed in water and clogs the toilet. Etc. will not occur. Further, since the body fluid permeation prevention film having a predetermined water solubility is provided on the clothing side of the absorber, it is possible to prevent the clothing from getting wet even when the absorber absorbs the body fluid. Further, since the outer crepe paper has an embossed pattern, the area where the outer crepe paper comes into contact with the wearer's skin can be reduced, and the wearing feeling can be improved.

It is a perspective view of the clothing side surface of a water-decomposable absorbent article. FIG. 1 is a cross-sectional view taken along the line AA of the water-decomposable absorbent article in FIG. It is a top view of the surface on the body side which shows the use state of a water-decomposable absorbent article.

Hereinafter, the present invention will be described in detail with reference to the drawings. In the description of this embodiment, the same elements are designated by the same reference numerals throughout. In the following description in the present specification, the body fluid refers to a liquid excreted from the body such as urine, blood, and water in loose stool. Further, the term “when the hydrolytically absorbent article 1 is worn” means at least one of the time and after the hydrolyzable absorbent article 1 is attached. In the description of the present specification, the longitudinal direction of the water-decomposable article 1 is a direction extending in front of and behind the wearer when the water-decomposable article 1 is worn, and the water-decomposable article 1 is described. The width direction is a direction laterally or orthogonal to the longitudinal direction. Further, in the present specification, the body-side surface of the hydrolyzable absorbent article 1 refers to the surface that comes into contact with the wearer's skin when the hydrolyzable absorbent article 1 is worn, and the clothing-side surface is the hydrolyzable absorbent article 1. Refers to the surface that comes into contact with the wearer's clothing when the article 1 is worn. In the present specification, the surface side of the water-decomposable article 1 on the body side may be referred to as the upper side, and the surface side on the clothing side may be referred to as the lower side.

<Hydrolytic and absorbent articles>
FIG. 1 is a perspective view of the water-decomposable article 1, and FIG. 2 is a cross-sectional view of the water-decomposable article 1. The hydrolyzable absorbent article 1 of the present invention is for men, and is an absorber 2 composed of a laminate of a plurality of hydrolyzable crepe papers 21 and a body liquid permeation prevention film located on the clothing side of the absorbent body 2. 3 and a water-decomposable outer crepe paper 4 which constitutes the outer surface of the water-decomposable absorbent article 1, covers the absorber 2 and the body liquid permeation prevention film 3, and contains water-soluble polymer fibers, and is hydrolyzable. The results of the JIS P 4501 looseness test of each of the sex crepe paper 21, the body fluid permeation prevention film 3, and the outer crepe paper 4 are within 100 seconds.

[Absorber]
(Water-decomposable crepe paper)
As described above, the absorber 2 is composed of a laminated body of a plurality of sheets of water-decomposable crepe paper 21, and the laminated body plays a role of absorbing and holding a body fluid. The water-decomposable crepe paper 21 may be made of 100% by mass of wood pulp, or may contain used paper pulp, non-wood pulp, and deinked pulp.

Further, the hydrolyzable crepe paper 21 may contain used paper pulp derived from a milk carton (milk pack) in order to reduce the environmental load. The amount of used paper pulp derived from the milk carton is preferably more than 0% by mass and 60% by mass or less, and more preferably 10% by mass or more and 50% by mass or less. Recycled paper pulp derived from milk carton is mainly made of softwood pulp and has the advantage that it is easy to improve the strength of the water-decomposable crepe paper 21, but there is a large variation in quality, and if the content ratio is too high, the quality of the product will be improved. May affect.

In the present invention, deinked pulp derived from newspaper, magazine waste paper, etc. can be blended in a range of 25 parts by mass or less with respect to 100 parts by mass of the recycled paper pulp derived from NBKP, LBKP, and milk carton. The content of the deinked pulp is preferably 0% by mass or more and 20% by mass or less, and more preferably 0% by mass or more and 10% by mass or less. Since the deinked pulp is also used paper, the quality of the water-decomposable crepe paper 21 will vary greatly by blending it with the pulp raw material. Further, the deinked pulp usually contains a fluorescent dye, and if the content thereof exceeds 20% by mass, the hydrolyzable crepe paper 21 may contain a large amount of the fluorescent dye.

(Embossing)
In the present invention, the water-decomposable crepe paper 21 used for the absorber 2 may be embossed. By embossing, voids are formed between the laminated water-decomposable crepe papers 21 adjacent to the top and bottom, and the body fluid is retained in these voids. Is improved. When embossing the water-decomposable crepe paper 21, double embossing or single embossing may be performed, but double embossing is more preferable. When single embossing is applied, in order to maintain the gap between the laminated sheets, it is desirable that the sheets are not embossed at once, but are embossed for each sheet and then laminated. Further, in order to effectively form voids between the water-decomposable crepe papers 21 adjacent to the top and bottom, the water-decomposable crepe paper 21 which has not been embossed is placed above and below the water-decomposable crepe paper 21 which has been embossed. May be arranged so that the embossed water-decomposable crepe paper 21 and the non-embossed water-decomposable crepe paper 21 are alternately laminated.

(Number of laminated hydraulic crepe papers)
The number of laminated sheets of the water-decomposable crepe paper 21 is preferably selected as appropriate within a range in which the water-decomposability and absorption performance of the water-decomposable absorbent article 1 are maintained in a well-balanced manner, but is preferably 6 or more and 12 or less. ..

(Basis weight of hydrolyzable crepe paper)
The basis weight of the water-decomposable crepe paper 21 ^{is preferably 16 g / m 2} or more and 23 g / m ² or less, and more preferably 18 g / m ² or more and 21 g / m ² or less per sheet. When the basis weight of the water-decomposable crepe paper 21 is within the above range, the water-decomposability and the absorption performance of the water-decomposable absorbent article 1 are maintained in a well-balanced manner.

[Body fluid penetration prevention film]
In the water-decomposable absorbent article 1 of the present invention, the body fluid permeation prevention film 3 is arranged on the clothing side of the absorber 2. By arranging the body fluid permeation prevention film 3 on the clothing side of the absorber 2, the body fluid held by the absorber 2 permeates the clothing side of the body fluid permeation prevention film 3 even after the absorber 2 has absorbed the body fluid. It is possible to prevent the water-decomposable article 1 that has absorbed the body fluid from getting the wearer's clothes wet.

Various water-soluble films can be used as the body liquid permeation prevention film 3, but more specifically, polyvinyl alcohol, carboxymethyl cellulose, methyl cellulose, hydroxyethyl methyl cellulose, hydroxypropyl methyl cellulose, hydroxypropyl cellulose, polyethylene oxide, polyvinyl. It is preferable to use a water-soluble film composed of a water-soluble polymer such as pyrrolidone, sodium alginate, gelatin, starch, and purulan. In the present invention, among these, it is preferable to use a polyvinyl alcohol film having both an ability to prevent permeation of body fluid and water solubility. The film thickness of the body fluid permeation prevention film 3 is preferably 20 μm or more and 40 μm or less, and more preferably 25 μm or more and 35 μm or less. By setting the film thickness of the body fluid permeation prevention film 3 within the above range, it is possible to achieve both the body fluid permeation prevention ability and water solubility.

[Outer crepe paper]
In the present invention, the absorber 2 made of a laminated body of the water-decomposable crepe paper 21, the body fluid permeation prevention film 3, and the outer surface of the water-decomposable absorbent article 1 are formed, and the absorber 2 and the body fluid permeation prevention film 3 are formed. It has an outer crepe paper 4 to cover. The outer crepe paper 4 is made by mixing water-soluble polymer fibers with wood pulp, and is configured so that its morphology does not easily collapse after absorbing body fluids. The basis weight of the outer crepe paper 4 ^{is preferably 30 g / m 2} or more and 50 g / m ² or less, and more preferably 38 g / m ² or more and 42 g / m ² or less from the viewpoint of providing sufficient strength. ..

As the wood pulp, the content of NBKP (coniferous bleached kraft pulp) is preferably 60% by mass or more and 100% by mass or less, and more preferably 70% by mass or more and 100% by mass or less. Further, the wood pulp may contain LBKP (hardwood bleached kraft pulp), and the content of LBKP is preferably more than 0% by mass and 40% by mass or less, more than 0% by mass and 30% by mass or less. Is more preferable.

(Water-soluble polymer fiber)
As described above, the outer crepe paper 4 is mixed with water-soluble polymer fibers, so that the outer crepe paper 4 can maintain its shape even after the outer crepe paper 4 has absorbed the body fluid. ing. Further, even if the outer crepe paper 4 becomes wet due to the body fluid, it is possible to prevent the sheet from being easily torn or the fibers from falling off to contaminate the human body.

Polyvinyl alcohol fiber, carboxymethyl cellulose fiber and the like can be used as the water-soluble polymer fiber that can be penetrated into the outer crepe paper 4, and is not particularly limited, but in the present invention, it is preferable to use carboxymethyl cellulose fiber. .. The amount of the water-soluble polymer fiber blended in the outer crepe paper 4 is preferably 0.5% or more and 5.0% or less.

The outer crepe paper 4 forms a bag body by folding a strip-shaped crepe paper in three, and the absorber 2 and the body fluid permeation prevention film 3 can be stored in the bag body. At this time, it is preferable that both ends of the strip-shaped outer crepe paper 4 that faces each other by being folded in three in the lateral direction are sealed with thermocompression bonding seals.

(Embossed pattern)
In the water-decomposable absorbent article 1 of the present invention, the outer crepe paper 4 has an embossed pattern 41. As a result, the area in which the outer crepe paper 4 comes into contact with the wearer's skin can be reduced, and the wearing feeling can be improved. The embossed pattern 41 refers to an uneven shape formed by embossing. The embossing pattern 41 may be a single embossing pattern or a double embossing pattern, but is preferably a single embossing pattern.

In the water-decomposable article 1 of the present invention, the depth of the embossed pattern 41 of the outer crepe paper 4 is preferably 0.5 mm or more and 1.5 mm or less, and 0.7 mm or more and 1.3 mm or less. Is more preferable, and 0.8 mm or more and 1.1 mm or less is further preferable. Thereby, the softness of the outer crepe paper 4 can be improved, and the wearing feeling can be made excellent.

The depth of the embossed pattern 41 of the outer crepe paper 4 can be determined by measuring the height difference of the embossed pattern 41 using a microscope or the like according to a conventional method. For example, as the microscope, the product name "One-shot 3D measurement microscope VR-3100" manufactured by KEYENCE can be used. As the microscope image observation / measurement / image analysis software, for example, the product name "VR-H1A" can be used.

In the water-decomposable absorbent article 1 of the present invention, the area of the embossed pattern 41 of the outer crepe paper 4 ^{is preferably 0.5 mm 2} / piece or more and 2.5 mm ² / piece or less, preferably 0.8 mm ² / piece. It is more preferably 2.0 mm ² / piece or more, and further preferably 1.0 mm ² / piece or more and 1.5 mm ² / piece or less. The area ratio of the embossed pattern 41 is preferably 5% or more and 60% or less, more preferably 8% or more and 40% or less, and further preferably 10% or more and 30% or less. As a result, the area where the outer crepe paper 4 comes into contact with the wearer's skin can be made good, and the wearing feeling can be made excellent.

The area and area ratio of the embossed pattern 41 included in the outer crepe paper 4 can be obtained by measuring the height difference of the embossed pattern 41 using a microscope or the like according to a conventional method.

[Dimensions of hydrolyzable and absorbent articles]
The hydrolyzable absorbent article 1 preferably has a substantially square or rectangular shape having a side of 120 mm or more and 150 mm or less. FIG. 3 is a drawing showing a usage state of the water-decomposable absorbent article 1. Here, when the hydrolyzable absorbent article 1 is used, it is preferable to attach it to underwear so that the two opposing corners are arranged one above the other. When the water-decomposable article 1 of the present invention is used, it may be used in combination with a special underwear having a pocket capable of storing the substantially square or rectangular water-decomposable article 1.

[Easy to unravel]
The water-decomposable absorbent article 1 has a JIS P 4501 looseness test result of each of the water-decomposable crepe paper 21, the body liquid permeation prevention film 3, and the outer crepe paper 4 within 100 seconds, and is particularly wet. Even a high-strength outer crepe paper 4 is preferably made within 80 seconds. Further, the result of the JIS P 4501 looseness test of the water-decomposable absorbent article 1 itself is preferably within 80 seconds per 0.3 g, and more preferably within 60 seconds. When the ease of loosening satisfies the above conditions and the product weight is 6.5 g or less, when the hydrolyzable absorbent article 1 is disposed of in the toilet, it is rapidly dispersed in water.

1 Hydrolyzable absorbent article 2 Absorber 21 Hydrolytic crepe paper 3 Body fluid permeation prevention film 4 Outer crepe paper 41 Embossed pattern

Claims (7)

It is a water-decomposable and absorbent article for men.
An absorber consisting of a laminate of multiple sheets of water-decomposable crepe paper,
A body fluid permeation prevention film located on the clothing side of the absorber,
It comprises a water-soluble outer crepe paper, which constitutes the outer surface of the water-soluble absorbent article, completely covers the absorber and body fluid permeation-preventing film, and contains water-soluble polymer fibers.
The result of the JIS P 4501 looseness test for each of the water-decomposable crepe paper, the body fluid permeation prevention film, and the outer crepe paper was within 100 seconds, and the result of the JIS P 4501 looseness test of the water-decomposable absorbent article itself was 0. Within 60 seconds per 3 g, and the weight of the hydrolyzable absorbent article is 6.5 g or less .
The film thickness of the body fluid permeation prevention film is 20 μm or more and 40 μm or less.
A hydrolyzable absorbent article in which the outer crepe paper has an embossed pattern. The embossed pattern of the outer crepe paper has a depth of 0.5 mm or more and 1.5 mm or less, and an area of the embossed pattern of 0.5 mm ² / piece or more and 2.5 mm ² / piece or less. The water-decomposable absorbent article according to claim 1, wherein the area ratio of the embossed pattern is 5% or more and 60% or less. The hydrolyzable absorbent article according to claim 1 or 2, wherein the hydrolyzable crepe paper constituting the absorber has a basis weight of 16 g / m ² or more and 23 g / m ^{2 or less per sheet.} The water-decomposable absorbent article according to any one of claims 1 to 3, wherein the outer crepe paper has a basis weight of 30 g / m ² or more and 50 g / m ^{2 or less.} The water-soluble absorbent article according to any one of claims 1 to 4, wherein the water-soluble polymer fiber contained in the outer crepe paper is a carboxymethyl cellulose fiber or a polyvinyl alcohol fiber. The water-decomposable absorbent article according to any one of claims 1 to 5, wherein the body fluid permeation prevention film is a polyvinyl alcohol film. The hydrolyzable absorbent article according to any one of claims 1 to 6, which has a substantially square shape having a side of 120 mm or more and 150 mm or less.

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