A semi-dull high-strength low-elongation viscose fiber and its preparation method

Abstract

The invention provides a semi-dull, high-strength, low-elongation viscose fiber and a preparation method thereof. The viscose fiber is prepared by impregnating pulp raw materials, grinding, crushing, kneading, depolymerizing, yellowing, dissolving, and filtering in sequence. , defoaming, ripening, spinning and drawing and post-treatment, the viscose fiber has the following indicators: dry breaking strength ≥ 3.10 cN / dtex, wet breaking strength ≥ 1.60 cN / dtex, 5% elongation in wet state The strength required for elongation is ≥0.55cN / dtex, and the dry elongation at break is 11.0-19.0%. The high-strength and low-elongation viscose fiber involved in the present invention is a new type of fiber achieved through technological innovation. It has an index system different from ordinary viscose fiber and modal fiber, and its products not only show the high-strength, low-elongation fiber characteristics of modal fiber , it also shows stronger skin-friendly properties than cotton fibers, which can effectively replace the existing differentiated viscose fibers. While improving the processing performance of viscose fibers in downstream processes, it can also promote the development and industrialization of downstream new textiles upgrade.

Description

technical field [0001] The invention relates to the technical field of viscose fiber, in particular to a 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. Viscose stapl...

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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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