Ultrafine semi-dull high-strength low-elongation viscose fiber and preparation method thereof

Abstract

The invention provides an ultrafine semi-dull high-strength low-elongation viscose fiber and a preparation method thereof. The viscose fiber is obtained by sequentially performing soaking, grinding, squeezing crushing, kneading, polymerization reduction, yellowing, dissolving, filtering, defoaming, curing, spinning drawing and after-treatment on a pulp raw material, and has the following indexes that the fineness is 0.8-1.11dtex, the dry fracture strength is more than or equal to 3.10cN / dtex, the wet fracture strength is more than or equal to 1.60cN / dtex, the strength needed for generating 5% of the elongation in a wet state is more than or equal to 0.55cN / dtex, and the dry elongation at break is 11.0-19.0%. The ultrafine high-strength low-elongation viscose fiber is a novel fiber variety realized by virtue of technical innovation, and has an index system which is different from that of ordinary viscose fibers and Modal fibers, and a product of the fiber shows the fiber characteristics of high strength and low elongation of the Modal fibers and also shows skin affinity stronger than that of cotton fibers, so that the ultrafine semi-dull high-strength low-elongation viscose fiber can effectively replace the existing differentiation viscose fiber, and while the processability of the downstream process of the viscose fiber is improved, the development and the industrial upgrading of downstream novel textiles are promoted.

Description

technical field [0001] The invention relates to the technical field of viscose fiber, in particular to an ultrafine semi-dull high-strength low-elongation viscose fiber and a preparation method thereof. Background technique [0002] Textile fiber raw materials are mainly divided into natural fiber raw materials represented by cotton and hemp, petroleum-based fiber raw materials represented by polyester and acrylic fibers, and tencel, cupro ammonia fiber, Viscose fiber and other bio-based fiber raw materials. Cotton fiber is well-known for its comfort, softness, breathability, and close-fitting qualities. It accounts for about 36% of the total textile fiber market. The nutritional content of cotton, and the reduction of cotton planting soil area in countries all over the world to ensure the food supply of the global population have limited the cultivation of cotton, and the shortage of cotton fiber raw materials cannot meet the growing needs of people's living standards. V...

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Problems solved by technology

[0009] Only the above-mentioned published patent documents can know that in order to produce differentiated and functional viscose fibers, the prior art is realized by changing the production process, which involves raw materials, viscose molding and its process parameters Compared with ordinary viscose fiber, the obtained viscose fiber has been properly optimized in terms of fineness and strength, but for the increasingly fierce market competition, the differentiated viscose fiber does not meet the downstream needs to a greater extent. The development of new textiles and industrial upgrading, especially the development of fiber raw materials such as tencel, modal, and cupro fibers, which are also regenerated from natural cellulose materials, have reduced the market share of viscose fibers.

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