Ultra-thin fluid absorbent body for disposable hygiene product

Abstract

The invention discloses an ultra-thin fluid absorbent body for a disposable hygiene product. The absorbent body comprises a liquid-permeable layer, a liquid-tight layer and an absorbent core layer, wherein the liquid-permeable layer comprises at least one layer of non-woven material; the absorbent core layer comprises at least two layers of non-woven materials, and at least one mixed body layer is arranged between the non-woven materials; a liquid-guidance passage is formed in the mixed body layer; a layer of non-woven fabric covers the periphery of the absorbent core layer; the lower liquid-tight layer comprises at least one layer of thin film; and the liquid-permeable layer, the liquid-tight layer and the absorbent core layer are bonded by virtue of adhesives. The absorbent body provided by the invention is reasonable in design and simple in production process. The ultra-thin fluid absorbent core layer comprises absorbent polymer particles and the liquid-guidance passage which is formed due to uneven distribution of the absorbent polymer particles, so that the absorbent body adopting the absorbent core layer is capable of obviously accelerating seepage speed of liquid and keeping surface dry after absorbing the liquid; and the absorbent body has good popularization and application values.

Description

technical field [0001] The invention relates to an absorber, in particular to an ultra-thin fluid absorber used in disposable sanitary products. Background technique [0002] The comfort and functionality of disposable sanitary products such as baby diapers continue to develop, but the current high-performance disposable sanitary products usually cannot achieve ultra-thin performance. There is a big gap between the surface dryness after liquid absorption and traditional non-ultra-thin products. [0003] Ultra-thin disposable sanitary products do not directly use cellulose fibers such as fluff pulp or wood pulp as a material for the absorbent core layer, but combine cellulose fibers such as fluff pulp or wood pulp with chemical fibers such as polyethylene, polypropylene, The mixed fibers of polyvinyl chloride, polyester and several kinds of chemical fibers among them are formed into cellulose fibers and chemical fiber mixed nonwovens through air laying, so that the ultra-thi...

AI Technical Summary

Problems solved by technology

However, this method does not significantly improve the liquid infiltration rate and the dryness of the surface after absorbing the liquid in the disposable sanitary product, and in the ultra-thin disposable sanitary product, the flow-guiding layer changes the liquid in the ultra-thin disposable sanitary product. The distribution of liquid in the absorbent core of the absorbent body of disposable sanitary products. The above changes are not conducive to the liquid infiltration speed and dryness after absorbing liquid of disposable sanitary products, and disposable sanitary products mainly depend on the liquid conduction of the absorbent polymer itself. The mechanism of performance has not changed, so it is not easy to significantly increase the speed of liquid infiltration and improve the surface dryness of the absorbent body after absorbing liquid

[0005] Another way to increase the speed of permeation of liquid in disposable hygiene products and improve the dryness of the absorbent body surface after liquid absorption is to use at least one absorbent core layer containing absorbent polymers and at least one layer that does not contain or contains a relatively small amount of absorbent. However, the thickness of this composite absorbent core layer is larger than the absorbent core layer of the ultra-thin absorbent body described in the claims, which is not light enough, and the above composite absorbent core layer If the absorbent core layer containing absorbent polymer particles is placed on the uppermost layer, it will not significantly change the absorbent core layer. Due to the phenomenon of local gel clogging after liquid absorption, the fluid-conducting space retention mechanism in the absorbent body will disappear, resulting in slow liquid seepage and absorption. The problem of poor surface dryness after liquid; if the absorbent core layer containing absorbent polymer particles in the above-mentioned composite absorbent core layer is not the uppermost layer, such as a composite absorbent core layer consisting of two absorbent core layers containing absorbent polymer particles The absorbent core layer is located in the lower layer, or the absorbent core layer containing absorbent polymer particles in the composite absorbent core layer comprising three or more absorbent core layers is located in the middle layer or the lower layer, then the absorbent body is introduced into the absorbent body without or with a relatively small amount of The absorbent core layer of absorbent polymer acts as a liquid-conducting space maintenance mechanism, which will significantly increase the liquid penetration rate of the absorbent body. After the absorber absorbs liquid, the dryness of the surface decreases

[0006] Another way to speed up the seepage of liquid in disposable sanitary products and improve the surface dryness of the absorbent body after absorbing liquid is to use the method of combining the above two methods, that is, to use a highly functional diversion layer as the upper layer of permeable A part of the liquid layer adopts absorbent polymer particles with a lower centrifugal bond rate but better liquid permeability, and uses the above-mentioned composite absorbent core layer. However, this method increases the cost and still faces the second above-mentioned problems faced in the method

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