JPS63153060A - Body fluids absorbing article - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a body fluid-absorbing article using a specific absorbent body containing a water-absorbing polymer.

More specifically, the present invention relates to a body fluid-absorbing article that can stably retain body fluids over time even after absorbing body fluids, does not leak laterally, and has significantly improved absorption properties.

(Prior art) In recent years, absorbent materials for body fluid-absorbing articles such as disposable diapers, sanitary napkins, and sweat-absorbing pads have been made by combining conventional fibrous materials such as cotton, valves, and paper with water-absorbing polymers. ing. There is a growing tendency to make these absorbent articles more compact from the viewpoint of portability and wearability, and many absorbent articles with a higher proportion of water-absorbing polymer in the absorbent body have appeared.

(Problem to be solved by the invention) However, in conventional body fluid-absorbing articles using absorbers made of composites of these water-absorbing polymers, after absorbing body fluids such as urine, menstrual blood, sweat, etc. The polymer swelling gel deteriorates and decomposes over time, and the absorbent body cannot stably hold body fluids over time, resulting in side leakage, which can stain pillows, sheets, clothing, etc. with body fluids.

As described above, conventional body fluid-absorbing articles have a problem in that the absorbent body's ability to retain body fluids decreases over time and tends to fall sideways. There is a desire for a body fluid absorbent article with improved absorption properties and excellent retention properties.

(Means and effects for solving the problem) In view of the above circumstances, the present inventors have conducted intensive research and found that the oxidizing agent causes the swelling gel of the water-absorbing polymer to change over time after absorbing body fluids. The present invention was achieved by discovering that deterioration and decomposition can be prevented.

That is, the present invention relates to a body fluid-absorbing article characterized in that an oxidizing agent is arranged in an absorbent body containing a water-absorbing polymer.

The water-absorbing polymer used in the absorbent body in the present invention absorbs large amounts of water in water and swells to form a hydrogel, such as starch-acrylonitrile graft copolymer hydrolyzate, starch, etc. - Neutralized acrylic acid graft polymer, saponified acrylic ester-vinyl acetate copolymer, cross-linked polyvinyl alcohol modified product, partially neutralized polyacrylate cross-linked product, cross-linked isobutylene-maleic anhydride copolymer, etc. can be mentioned.

In addition, the oxidizing agent used in the absorber in the present invention is not particularly limited as long as it has an oxidizing effect, such as peroxides such as hydrogen peroxide, sodium peroxide, and barium peroxide; fluorine, Halogens such as chlorine, bromine, and iodine;
Metal salts such as ferric chloride, cupric sulfate, cupric chloride, cupric acetate, and ferric acetate; metal oxides such as potassium permanganate, potassium chromate, and osmium tetroxide; secondary chlorine Chlorine oxides such as sodium acid, sodium chlorite, chlorine dioxide, chloramine T, and bleaching powder; quinones such as p-benzoquinone; ozone, etc. can be used.

The amount of oxidizing agent used in the present invention is 10
0.001-10 for 0 parts by weight! ! ! A proportion within the range of part a is preferred. If the amount of the oxidizing agent used is less than 0.001 parts by weight, it will not be a substantially effective amount, and the effect of preventing the swelling gel from deteriorating will be low, and even if the amount is more than 10 parts by weight, the effect commensurate with the increased amount cannot be obtained On the contrary, this is unfavorable from a cost standpoint since the amount of body fluid absorbed by the absorbent body decreases.

The body fluid-absorbing article of the present invention is constructed by disposing the above-mentioned oxidizing agent on an absorbent body containing the above-mentioned water-absorbing polymer,
It is not limited by the shape or structure of the absorber.

Therefore, conventionally known methods employed for processing water-absorbing polymers into absorbent bodies in the form of sheets or films that are convenient for constructing body fluid-absorbing articles such as disposable diapers, sanitary napkins, and sweat-absorbing pads are used. be able to. Specifically, the water-absorbing polymer is sandwiched between absorbent paper or non-woven fabric, or the water-absorbing polymer and a crushing valve are mixed in a dry or wet process and then formed into a sheet. It is possible to obtain an absorbent body.

In the present invention, the method for disposing the oxidizing agent in the absorbent body is not particularly limited as long as the oxidizing agent can be preferably uniformly disposed in the absorbent body. For example, in the manufacturing process of the absorbent body, It is sufficient to simply add an oxidizing agent to the water-absorbing polymer, paper, valve, and other 8M materials that make up the absorber. The oxidizing agent may be added as it is, or may be added in the form of a liquid dissolved or dispersed in another solvent. Among these, adding an oxidizing agent during the manufacturing process of the water-absorbing polymer so that the oxidizing agent is contained in the water-absorbing polymer is effective in preventing deterioration and aging of the swollen gel of the water-absorbing polymer over time. It is preferable because it has a large effect of preventing decomposition.

In order to obtain the body fluid absorbent article of the present invention using the absorbent body obtained in this way, this absorbent body may be used alone or in appropriate combination with other components to prepare the body fluid absorbent article, depending on the intended use of the absorbent article. Just configure it. For example, in the case of a sweat-absorbing pad, the obtained absorbent body can be placed directly on a stone to form a body fluid-absorbing article. Further, in the case of sanitary materials such as paper diapers and sanitary napkins, the obtained absorbent body can be combined by placing it between a body fluid permeable sheet and a body fluid leakproof sheet to form a body fluid absorbing article.

The body fluid-absorbing article of the present invention has particularly excellent effects when used in diapers, which have a large amount of excretion and a long contact time with urine, which causes the phenomenon of deterioration and decomposition of the swollen gel of the water-absorbing polymer to be more pronounced. Demonstrate.

(Effects of the Invention) In the body fluid absorbent article of the present invention, the body fluid retention property of the absorbent body containing the water-absorbing polymer does not deteriorate over time.
Since it does not cause side leakage, it can be effectively used as disposable diapers, sanitary napkins, sweat absorbent pads, etc.

In addition, in the body fluid-absorbing article of the present invention, the deterioration and decomposition of the water-absorbing polymer is completely suppressed even after absorbing body fluids due to the action of the oxidizing agent disposed in the absorbent body. It is possible to increase the proportion of therefore,
The present invention provides a body fluid absorbent article that is compact, easy to carry and wear, and has excellent absorption properties.

(Examples) Examples will be shown below, but the present invention is not limited to these examples. In the Examples shown below, unless otherwise specified, all parts and % represent parts by weight and % by weight.

Example 1 A water-absorbing polymer whose main component is a partially neutralized cross-linked polyacrylate (trade name: Aqualic CA).

35% hydrogen peroxide in 100 parts (manufactured by Nippon Shokubai Chemical Co., Ltd.)
Part of the aqueous solution was sprayed and mixed to obtain granular water absorbing agent (1).

Next, two laminated pulverized valve seats (1150g
/TrL2, density 0.1g/CII, size 19011
III1, X140a*), water absorbing agent (1) 1.5
0 was evenly spread and sandwiched to obtain an absorbent body. This absorbent body was sandwiched between one polyethylene film and one polypropylene spunbond nonwoven fabric to obtain a body fluid absorbent article (1) of the present invention.

Adult method 60Q was poured into the center of the nonwoven fabric side of the obtained body fluid absorbent article (1) and absorbed. After leaving for 8 hours, 23cys x 23 from the nonwoven fabric side of the body fluid absorbing article (1)
After 10 paper towels of α were covered and a pressure of 40Q/ex2 was applied for 1 minute, the paper towels were weighed and the amount of the adult method absorbed by the paper towels was measured. In addition, the state of the swollen gel was observed with the naked eye, and the state of deterioration of the water-absorbing polymer was evaluated in three stages from O to Δ to X. The results are shown in Table 1.

Example 2 In 100 parts of the same water-absorbing polymer used in Example 1, 3
% iodine aqueous solution was sprayed and mixed to obtain a granular water absorbing agent (2).

A body fluid-absorbing article (2) was obtained in the same manner as in Example 1, except that this water-absorbing agent (2) was used instead of the water-absorbing agent (1) in Example 1.

Using the obtained body fluid-absorbing article (2), the amount returned by the adult method was measured and the state of deterioration of the water-absorbing polymer was evaluated in the same manner as in Example 1.

The results are shown in Table 1.

Example 3 Water-absorbing polymer mainly composed of neutralized starch-acrylic acid graft polymer (product name: Sunwet IM-1)
000, manufactured by Sanyo Chemical Industries, Ltd.) and 1 part of anhydrous cupric chloride was added and mixed to obtain a powdery water absorbing agent (3).

A body fluid-absorbing article (3) was obtained in the same manner as in Example 1 except that this water-absorbing agent (3) was used in place of the water-absorbing agent (1) in Example 1.

Using the obtained body fluid-absorbing article (3), the amount returned by the adult method was measured and the deterioration state of the water-absorbing polymer was evaluated in the same manner as in Example 1.

The results are shown in Table 1.

Example 4 8-part pulverized valve seat (basis weight 150C1,”m,
Density 0.10/CM, size 19ONR×140#I
10% sodium hypochlorite aqueous solution to 0.1
q spraying to obtain an oxidizing agent-containing valve seat (1).

Next, 1.5 g of the same water-absorbing polymer as used in Example 1 was uniformly sprinkled and sandwiched between two oxidizing agent-containing valve seats (1) to obtain an absorber.

This absorbent body was sandwiched between one polyethylene film and one polypropylene spunbond nonwoven fabric to obtain a body fluid absorbent article (4).

Using the obtained body fluid-absorbing article (4), the amount of return of the adult bed was measured and the state of deterioration of the water-absorbing polymer was evaluated in the same manner as in Example 1.

The results are shown in Table 1.

Example 5 A body fluid-absorbing article (5) was obtained in the same manner as in Example 4, except that the same amount of the water-absorbing agent (1) obtained in Example 1 was used instead of 1.5 g of the water-absorbing polymer in Example 4. Ta.

Using the obtained body fluid-absorbing article (5), the amount of return of the adult bed was measured and the state of deterioration of the water-absorbing polymer was evaluated in the same manner as in Example 1.

The results are shown in Table 1.

Example 6 A body fluid-absorbing article (6) was obtained in the same manner as in Example 4, except that the same amount of water-absorbing agent (2) obtained in Example 2 was used instead of 1.5 g of the water-absorbing polymer in Example 4. Ta.

Using the obtained body fluid absorbent article (6), the amount of return of the adult bed was measured and the state of deterioration of the water-absorbing polymer was evaluated in the same manner as in Example 1.

The results are shown in Table 1.

Comparative example 1 Water absorbing agent (1) in Example 1 instead of 1.5G
A comparative body fluid absorbent article (1) was obtained in the same manner as in Example 1, except that the same water-absorbing polymer (trade name: Aqualic CA) used in Example 1 was used.

Using the obtained comparative body fluid absorbent article (1), Example 1
The amount of return of the adult bed was measured and the state of deterioration of the water-absorbing polymer was evaluated using the same method as in . The results are shown in Table 1.

Comparative Example 2 Same as Example 1 except that the same amount of water absorbing polymer (trade name: Sunwet IM-1000) used in Example 3 was used instead of 1.5 g of water absorbing agent (1) in Example 1. In the same manner, a comparative body fluid absorbent article (2) was obtained.

Using the obtained comparative body fluid absorbent article (2), Example 1
Using the same method as in , we measured the return depth of the adult bed and evaluated the state of deterioration of the water-absorbing polymer. The results are shown in Table 1.

Chapter 1 Table (Note 1) O: The shape of the swollen glue is maintained.

△: The shape of the swollen gel is partially distorted.

×: The shape of the swollen gel collapses and becomes mushy and fluid.

Claims (1)

[Claims] 1. A body fluid-absorbing article characterized in that an oxidizing agent is arranged in an absorbent body containing a water-absorbing polymer.