JPS5829099B2 - Body fluid treatment supplies - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to body fluid treatment products such as menstrual napkins and paper diapers.

Conventionally, in order to increase the ability of this type of treatment product to absorb and retain body fluids, it has been possible to use water-insoluble polymeric substances that have the ability to absorb and retain several tens of times its own weight in conjunction with water-absorbing materials such as water-absorbing paper and pulverized pulp. Are known.

However, although the substance has a high water absorption and retention capacity as described above, its water absorption rate is relatively low (especially when it absorbs water to a certain extent and swells and becomes gel-like).

Therefore, if the substance is placed on top of an absorbent layer such as water-absorbing paper or pulverized pulp that absorbs this type of treatment product, depending on the amount of body fluid, it may not be absorbed at once, and the excess body fluid that is not absorbed may When this kind of treatment article is used, it has the disadvantage that it flows back to the upper surface and oozes out due to the pressurization.

In addition, when the substance is placed at the bottom of the absorbent layer, most of the body fluid is absorbed by the absorbent paper, crushed pulp, etc. on the top until it reaches the position of the substance, and there is a disadvantage that the substance is not used effectively. .

On the other hand, in this type of treatment article, one is known in which an activated carbon sheet is disposed in order to prevent menstrual odor.

However, since the activated carbon sheet is made by simply fixing activated carbon to the sheet via an adhesive or by inserting activated carbon into the sheet, activated carbon particles may fall off during handling and use of this type of processing supplies. In addition, the latter type has a poor yield of activated carbon during production of activated carbon sheets, and therefore has a low adsorption capacity for physiological odors.

Furthermore, in conventional treatment products of this type, the activated carbon sheet is placed with the intention of simply bringing the menstrual odor into contact with the activated carbon and adsorbing it, but this is not used effectively, and the prevention of menstrual odor has not been achieved. In the end, it is insufficient.

The object of the present invention is to provide a body fluid treatment article that can eliminate the above-mentioned drawbacks, and the configuration for achieving the object will be explained based on the illustrated embodiments.
It is as follows.

FIG. 1 is a sectional view in the thickness direction of the body fluid treatment article of the present invention.

The body fluid absorber, which is the main part of the present invention, has a first absorbent layer 1, a second absorbent layer
It is constructed by sequentially stacking an absorbent layer 2, a third absorbent/adsorption layer 3, and a fourth absorbent layer 4 from top to bottom.

The first absorbent layer 1 is composed of a pulp-based material having a basis weight of 10 to 30jj/lri' that has water absorbing and diffusing properties, and a layer having a basis weight of 10 to 30j/lri' that is water insoluble and has water absorbing and swelling properties between 1a and Ia.
! /m: is fixed in the form of a sand inch, and the entire sheet is embossed.

The second absorbent layer 2 has conventionally been generally used as a water absorbing material in this type of treatment article.

It consists of pulverized pulp with a basis weight of 75 to 150 g/m and absorbent paper (several sheets laminated) alone or in combination.

The third absorption/adsorption layer 3 is a sheet 3a having a basis weight of 10 to 3097 m and having water absorbing and diffusing properties, which is mainly made of pulp.

Between 3a and 3b is a water-insoluble water-absorbing and swelling substance 3b having a basis weight of 10 to 30 g/rr? The sheet is mixed and fixed with the powdered adsorbent material 3b, and the entire sheet is embossed.

The fourth absorbent layer 4 is made of water-absorbing paper (several sheets laminated), which has conventionally been generally used as a water-absorbing material in this type of treatment article.

The substance 1b is water-insoluble and has water-absorbing swelling properties.

Examples of 3b include acrylonitrile, acrylamide, acrylic acid, sodium acrylate, acrylic acid ester, methacrylonitrile, methacrylonitrilic acid ester, vinyl acetate, etc. as monomers and copolymers for graft copolymers with partially crosslinked starch. ), modified carboxymethyl cellulose and modified polyvinyl alcohol (
At least one type selected from the group consisting of epichlorohydrin, isocyanate, acrylic acid, formaldehyde, glyoxal, etc. is used as the crosslinking agent.

When these substances 1b and 3b absorb water, they swell and become gel-like, and have a much higher water absorption and retention ability than water-absorbing paper, pulverized pulp, etc., which have conventionally been generally used as body fluid absorbing materials.

That is, it has a water absorption and retention capacity of 20 times or more than its own weight.

In addition to activated carbon, the adsorbent material 3b includes zeolite, maifan stone, humic acid, glyoxal, diatomaceous earth,
Ion exchange resins, activated alumina, etc. may be used alone or in combination.

If the sheets 1a, 3a have a basis weight of 10 g/m or less, their strength will decrease and they will be easily damaged.
, 3b and the powdered absorbent material 3b are exposed, the absorption and diffusion properties are poor, and the basis weight is 309/yr? If this is above, the amount of body fluid absorbed by Sea Ha, 3a increases, and the body fluid oozes upward before being absorbed by the powdered polymeric substances 1b, 3b, resulting in excellent absorption and retention of the substance. This is disadvantageous for effective use of capabilities.

Further, if the polymeric substances 1b and 3b have a basis weight of 10 g/rn' or less, the absorption and retention ability for body fluids decreases, and the basis weight is 3.
If it is 09/rri' or more, body fluids will not quickly permeate through the first absorption layer 1 and the third absorption/adsorption layer 3 due to the properties of the substance.

Further, if the basis weight of the adsorbent material 3b is less than 10 g/rri', a sufficient adsorption effect on menstrual odor cannot be obtained, and if the basis weight is more than 30 g/rri', body fluids may be absorbed by the adsorbent material 3b.
This prevents it from reaching the fourth absorbent layer 4, which is the next layer.

Further, if the second absorption layer 2 has a basis weight of 7597 m or less, body fluids will not be sufficiently guided to the entire surface of the third absorption/adsorption layer 3, and the polymer material 3b on the entire surface will not be effectively utilized.
If it is 9/lri'' or more, the amount of body fluid absorbed by the second absorbent layer 2 will increase, and similarly, the excellent absorption and retention ability of the polymeric substance 3b will not be effectively utilized.

The body fluid absorber of the present invention having such a structure has a polyethylene/P
A waterproof sheet 5 made by laminating a synthetic resin film such as VA onto thin paper or the like is placed and wrapped with an outer skin sheet 6 made of a water-permeable non-woven fabric to form a product.

The third absorbing/adsorbing layer 3 is formed by dispersing each powdered polymer substance 3b and powdered adsorbing substance 3b individually between two sheets made of the same material as the sheet 3a, as illustrated in FIG. A plurality of layers formed by each fixation may be used in a superimposed manner, and in that case, it is preferable that the layer containing the powdered adsorbent material 3b is positioned on the lower surface.

Further, the first absorbent layer 1 and the third absorbent/adsorbent layer 3 may be provided with micropores at appropriate intervals to facilitate the permeation of body fluids.

In the treatment article of the present invention configured as described above, the body fluid that has reached the first absorbent layer 1 via the outer skin sheet 6 is absorbed and retained by the powdery polymeric substance 1b while being diffused by the water absorption and diffusion sheet 1a. Excess body fluid that is not absorbed by the polymer substance at once is absorbed and diffused by the second absorbent layer 2 on the lower surface, and then absorbed by the third absorbent layer 2.
It reaches the absorption/adsorption layer 3, where it is absorbed in the same way as the first absorption layer 1, and then reaches the fourth absorption layer 4.

By the way, since the first absorbent layer 1 having the polymer substance 1b is disposed at the top of the body fluid absorber which is in contact with such a large amount of body fluid, the high absorption and retention ability of the polymer substance is effectively utilized. Even if the entire treatment article of the present invention is pressurized, the body fluid once absorbed into the second absorbent layer 2
Since the absorption and retention capacity of this substance is extremely high, it does not flow back through the first absorbent layer and ooze out from the outer skin sheet 6 on the upper surface.

Moreover, since the third absorption/adsorption layer 3 having a powdery polymeric substance 3b and a powdery adsorbent substance 3b is arranged between the second absorption layer 2 and the fourth absorption layer 4, the polymeric substance 3b is Due to its presence, the same function as the first absorbent layer 1 is achieved in relation to the fourth absorbent layer 4, and the presence of the adsorbent substance 3b allows physiological odor to be adsorbed. Although a relatively large amount of body fluid exists, and the physiological odor emitted from it is strong, the presence of the third absorption/adsorption layer 3 prevents the physiological odor from emanating upward. In other words, it is confined between the third absorption/adsorption layer 3 and the prevention sheet 5, and as a result,
It has the effect of emitting almost no odor and causing no discomfort.

[Brief explanation of the drawing]

The drawing shows one embodiment of the treatment article of the present invention.
The figure is a sectional view in the thickness direction of the article, and FIG. 2 is a sectional view in the thickness direction showing another embodiment of the third absorption/adsorption layer constituting the article. 1...First absorption layer, 2...Second absorption layer, 3...Third absorption/adsorption layer, 4...Fourth absorption layer, 5... Tarpaulin sheet, 6...
Outer skin sheet.

Claims (1)

[Scope of Claims] 1. A sheet with a basis weight of 10 to 30 g that has water absorption and diffusivity, and a basis weight of 10 to 3 that is water insoluble and has water absorption and swelling properties between the sheets of id.
A first absorbent layer formed by fixing a powdery polymer material of 0&/m2 in a sandwich shape is disposed on the top of the body fluid absorber, and a basis weight of 75 to 15,017 m2 is provided on the lower surface of the first absorbent layer.
A second absorbent layer consisting of pulverized pulp of
0g/lri' of a powdery polymeric substance that is water-insoluble and has water-swelling properties and a basis weight of 10 to 30 f! /m2 of a powdered adsorbent material, and a fourth absorbent layer made of water-absorbing paper is arranged on the lower surface of the third absorbent/adsorbent layer. Body fluid treatment supplies. 2. Powdered polymeric substances that are water-insoluble and have water absorption swelling properties are partially crosslinked starch-modified polymers (as monomers and copolymers of graft copolymers with starch, acrylonitrile, acrylamide, acrylic acid, sodium acrylate, acrylic acid ester, methacrylonitrile, mecrylonitrile acid ester, vinyl acetate, etc.), modified carboxymethyl t'/1zO-su, and modified polyvinyl alcohol (epichlorohydrin, isocyanate, acrylic acid, formaldehyde, glyoxal, etc. as a crosslinking agent). The body fluid treatment article according to claim 1, characterized in that it is at least one type selected from the group consisting of: