Absorbent body and absorbent article

A technology for absorbers and materials, applied in the field of absorbers and absorbent articles, can solve the problems of reduced gel strength, thickened thickness, and reduced crosslinking degree of acrylic acid, so as to improve liquid absorption rate, reduce deformation, and prevent leakage Effect

Inactive Publication Date: 2012-05-23
UNI CHARM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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 have not reached a satisfactory level, so new methods are being sought. absorbent material

Method used

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  • Absorbent body and absorbent article
  • Absorbent body and absorbent article
  • Absorbent body and absorbent article

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0196] -Parts for the upper layer-

[0197] Materials composed of sodium alginate (manufactured by Kimica Co., Ltd., B-S) and calcium hydrogenphosphate dihydrate (manufactured by Wako Pure Chemical Industries, Ltd.) were mixed at a mass ratio of 1:1 until uniform to obtain a gelling agent. By adopting a sprayer to spray water, the above-mentioned gelling agent is fixed on the through-flow non-woven fabric (PE / PP core-sheath composite fiber, basis weight: 40g / m 2 ) on the entire face, forming the basis weight of the above-mentioned gelling agent is 160g / m 2 parts for the upper layer.

[0198] -Parts for the lower layer-

[0199] A material composed of sodium alginate (manufactured by Kimica Co., Ltd., B-S) as a tackifier was fixed on a through-flow non-woven fabric (PE / PP core-sheath composite fiber, basis weight: 40 g / m) by spraying water with a sprayer. 2 ), the basis weight of the above tackifier is 160g / m 2 parts for the lower layer.

[0200] -Preparation of absorbent ...

preparation example 2

[0203] The material for the upper layer was changed to mix sodium alginate (manufactured by Kimica Co., Ltd., B-S), calcium hydrogen phosphate dihydrate (manufactured by Wako Pure Chemical Industries, Ltd.) and glucose at a mass ratio of 1:1:1. Absorbent 2 was prepared in accordance with Preparation Example 1 except for sugar acid-δ-lactone (manufactured by Wako Pure Chemical Industries, Ltd.).

Embodiment 1 and 2

[0213] [Examples 1 and 2, Comparative Examples 1 to 3, and Reference Example 1]

[0214] The properties of absorbent bodies 1 to 6 prepared in Preparation Examples 1 and 2, Comparative Preparation Examples 1 to 3, and Reference Preparation Example 1 were evaluated. The steps are as follows.

[0215] 1) Each absorber was placed in a plastic plate (10 cm x 10 cm x 1 cm), and the thickness was measured.

[0216] 2) With the surface sheet peeled off, artificial urine (2% urea, 0.8% sodium chloride, 0.08% magnesium sulfate heptahydrate, 0.03% calcium chloride dihydrate were dissolved in ion-exchanged water To prepare) 40g evenly poured on the upper parts, let stand for 5 minutes.

[0217] 3) The surface sheet was put back on the absorber, filter paper (30 g) was placed on it, and a weight of 3.5 kg was further placed.

[0218] 4) After 3 minutes, remove the filter paper and the weight, and calculate the absorption capacity of the filter paper (moisture regain 1) based on the mas...

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PUM

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Abstract

Disclosed are an absorbent body that includes a gelling region and a thickening region, and an absorbent article that contains said absorbent body. The absorbent body (1) is formed from at least two layers, wherein an upper layer (2) has a gelling region (4) containing a gelling agent that includes polysaccharides that can thicken in the presence of polyvalent metal ions and a material that can supply polyvalent metal ions, and a lower layer (3) has a thickening region (5) containing a thickening agent.

Description

technical field [0001] The present invention relates to an absorbent body including a gelled region and a thickened region, 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. [0003] Acrylic absorbents capable of absorbing water tens to thousands of times their own weight are known as absorbents, and are used in various products. In particular, absorbers made by dispersing superabsorbent polymer particles composed of cross-linked polyacrylates in pulp fibers are widely used in the fields of disposable diapers, sanitary products, m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61F13/49A61F13/15A61F13/53A61F13/534
CPCA61F2013/530795A61F2013/53051A61F13/535A61F13/532
Inventor 中下将志小西孝义水谷聪
Owner UNI CHARM CORP
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