A non-woven material with asymmetric transmission properties and its preparation process

Abstract

The invention discloses a nonwoven material with asymmetric transmission characteristics, and is suitable for the technical field of nonwoven materials. The nonwoven material is of a multi-level structure, comprising a moisture absorption layer, a transition moisture conducting layer and a moisture resistance layer, wherein the transition moisture conducting layer is arranged between the moisture absorption layer and the moisture resistance layer, and is compounded with the moisture absorption layer and the moisture resistance layer, the moisture absorption layer is composed of a variety of water absorbent fibers according to a certain proportion, the transition moisture conducting layer is of a mixed fiber layer formed by the interpenetration of the water absorbent fibers and PLA (poly lactic acid) filaments, and the moisture resistance layer is of a fluffy fiber layer formed by the PLA filaments. The invention also provides a preparation process of the nonwoven material with asymmetric transmission characteristics, the compounded nonwoven material formed by the PLA fiber layer and the the moisture absorption layer is obtained by preparing the fiber layer and compounding the fiber layer; the nonwoven material with asymmetric transmission characteristics and the preparation process thereof are green, environmentally friendly, biodegradable, meanwhile, the asymmetric transmission of the liquid water or the vapour water is realized in the nonwoven material.

Description

[0001] 【Technical field】 [0002] The invention relates to the technical field of nonwoven materials, in particular to a nonwoven material with asymmetric transmission characteristics and a preparation process thereof. [0003] 【Background technique】 [0004] As a kind of fiber material, non-woven materials can be made into short fibers with good hygroscopicity by using natural staple fibers such as cotton, wool, hemp, and bamboo fibers with good hygroscopicity due to their wide source of raw materials and flexible processing technology. Non-woven materials can be made into green non-woven materials by using biodegradable fibers such as chitosan fibers, chitin fibers, viscose fibers, etc. Degraded filament nonwovens. [0005] With the improvement of people's living standards and the advancement of science and technology, people not only require certain functionality and comfort from the nonwoven materials used around them, but also require them to be green, environmentally fri...

AI Technical Summary

Problems solved by technology

For nonwoven materials composed of biodegradable fibers, although the use of chemical finishing agents can control the transmission characteristics of liquid water and gaseous water in nonwoven materials, it will destroy the green, environmental protection and biodegradable characteristics of raw materials.

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