Lyocell fiber and preparation method thereof

Abstract

The invention provides a lyocell fiber and a preparation method thereof, and the preparation method comprises the following steps: pretreating seaweed particles to obtain seaweed fiber particles with the particle size of 0.2-0.5 [mu] m; adding a dispersing agent into deionized water, uniformly stirring, and adding the alginate fiber particles to form suspension liquid of the alginate fiber particles; dissolving cellulose pulp in an N-methylmorpholine-N-oxide aqueous solution containing an antioxidant, then adding the suspension of alginate fiber particles to form a mixed system, and uniformly stirring the mixed system to obtain a spinning solution; carrying out dry-jet wet spinning on the spinning solution, and washing and drying to obtain lyocell fibers; the pretreatment comprises grinding, screening and surface coating treatment. The suspension emulsion of alginate fiber particles is added into the spinning solution, so that the prepared lyocell fiber has a good far infrared function and a good negative ion function. According to the preparation method, the content of alginate fiber particles in the lyocell fibers can be effectively increased, and the functionality of the fibers is improved.

Description

technical field [0001] The invention relates to the textile field, in particular to a lyocell fiber and a preparation method thereof. Background technique [0002] The spinning process of lyocell fiber was first proposed by AkzonaInc in USP 4246221 and USP4416698, dissolving cellulose into N-methylmorpholine-N-oxide (NMMO) aqueous solution to make spinning stock solution, and then extruding by screw , Cold air pre-drying and stretching, and the physical properties of the fiber are further improved through the coagulation bath, and the solvent NMMO can be recycled and reused. China also built a 10,000-ton dry-spray wet spinning Lyocell process line with NMMO as a solvent in Xinxiang Chemical Fiber Co., Ltd. in 2014. Low quality, serious fibrillation and other problems. [0003] Seaweed fiber has good biocompatibility, far-infrared function, and has health care and antibacterial effects. USP4421583 attempts to use seaweed fibers in the medical field, and proposes to add sod...

AI Technical Summary

Problems solved by technology

However, the price of pure seaweed fiber is high, and the degree of industrialization of spinning is low. The physical properties of seaweed fiber for clothing or home textiles still need to be improved, and it requires harsh washing conditions.

[0004] In order to better give lyocell fibers such as antibacterial and other functionalities, USP 13049468 and USP 11567021 obtain functional lyocell fibers by adding seaweed fibers or their derivatives to the spinning dope prepared by dissolving cellulose in NMMO, but this method The content of seaweed fiber added in the cellulose pulp is low, generally only about 4% of the cellulose pulp, resulting in limited functionality of the fiber