Absorbent body and absorbent article

Abstract

To provide an absorbent core that can promote and / or inhibit gelling, and an absorbent article comprising it. An absorbent core comprising a gelling agent that contains a polysaccharide capable of thickening in the presence of a polyvalent metal ion, a substance that can supply a polyvalent metal ion, and an organic acid and / or polyvalent metal ion scavenger.

Description

technical field [0001] The present invention relates to an absorbent body capable of promoting and / or suppressing gelation, and an absorbent article including the absorbent body. Background technique [0002] Absorbents and absorbent articles containing the same are used in disposable diapers, sanitary products, medical blood-absorbent products, pet breeding products, etc., to treat liquids such as body fluids or excrement, and require excellent water absorption performance . In an absorbent body and an absorbent article including the absorbent body, weight reduction, thinning, and the like of the article are sought. In addition, from the perspective of environmental considerations and sanitation, hydrolysis and biodegradability, etc., which can reduce the amount of incineration after use or implement disposal in flush toilets, have been studied. [0003] Acrylic absorbents capable of absorbing water tens to thousands of times their own weight are known as absorbents, and ...

AI Technical Summary

Problems solved by technology

[0004] However, the above-mentioned acrylic absorbent material absorbs, retains and / or immobilizes liquids such as bodily fluids or excrement after they reach the position where the absorbent material exists, and it takes time for all the liquid to reach the position of the absorbent. Leakage sometimes occurs before melting

In addition, in order to obtain satisfactory absorption performance, it is necessary to use a relatively large amount of the above-mentioned acrylic absorbent, and there is a problem that it is difficult to achieve "weight reduction of absorbent bodies and absorbent articles".

[0005] Furthermore, as its characteristic, after the above-mentioned acrylic absorbent material absorbs liquid, the volume of the particles of the absorbent material increases greatly while absorbing the surrounding air, so there is a tendency for its thickness to become thick after absorption, and "wearing discomfort" sometimes occurs. and / or "reduced absorption properties"

In addition, although the above-mentioned acrylic absorbent has a very high absorption rate of ion-exchanged water, it tends to greatly reduce the absorption rate of ion-containing liquids such as body fluids.

Attempts have been made to reduce the degree of crosslinking of acrylic absorbent materials in order to improve absorption performance, but there are problems such as decreased gel strength

Furthermore, from the viewpoint of environmental protection, hydrolyzability and / or biodegradability are required for absorbent articles, but the hydrolyzability and biodegradability of the above-mentioned acrylic absorbent materials are not satisfactory, so new absorbent materials are being sought

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