Viscose fibers are regenerated cellulose fibers. It is made of natural cellulose as raw material, made into soluble cellulose xanthate by alkalization, aging, sulfonation and other processes, and then dissolved in dilute alkali solution to make viscose, which is made by wet spinning. Different viscose fibers, high-moisture modulus viscose fibers and high-strength viscose fibers can be obtained by using different raw materials and spinning processes. Ordinary viscose fiber has general physical and mechanical properties and chemical properties, and is divided into cotton type, wool type and filament type, commonly known as artificial cotton, artificial hair and rayon. High wet modulus viscose fibers have a high degree of polymerization, strength and wet modulus. This fiber can withstand a load of 22.0 cN per unit in the wet state, and the wet elongation under this load does not exceed 15%, mainly rich and strong fibers. High-strength viscose fiber has high strength and fatigue resistance.
Viscose fibers can be classified into ordinary viscose fibers, high-moisture modulus viscose fibers, strong viscose fibers and modified viscose fibers. Among the strong viscose fibers, filaments with a dry strength exceeding 30.0 cN/tex are called strong filaments; super filaments exceeding 38.0 cN/tex; two super strong filaments exceeding 44.1 cN/tex; exceeding 48.5 cN/tex It is called three super strong filaments; it is called four super strong filaments of more than 53.0 cN/tex. Among the high-performance viscose fibers, the fibers with higher elastic modulus in the wet state are called Polinosic fibers, also called high-moisture modulus fibers, and China is called rich and strong fibers, referred to as rich fibers. The wet modulus is between the ordinary fiber and the Polynosic fiber, but the fiber with higher collapsing strength and less brittleness is called modified high wet modulus fiber.