I asked about the gum. What are the ingredients and what are the characteristics?,
Viscose fiber belongs to regenerated cellulose fiber. It is made of natural cellulose as raw material, through the alkalization, aging, yellowing and other processes made soluble cellulose xanthate, and then dissolved in dilute alkaline viscose viscose, made by wet spinning. By using different raw materials and spinning process, ordinary viscose fiber, high wet modulus viscose fiber and high strength viscose fiber can be obtained respectively. Ordinary viscose fiber has general physical, mechanical and chemical properties, but also cotton, wool and filament type, commonly known as artificial cotton, artificial wool and rayon. High wet modulus viscose fiber has higher degree of polymerization, strength and wet modulus. This kind of fiber in the wet state so that the density of each unit line under 22.0cN load, and the load of the wet elongation of not more than 15%, there are strong fiber. High strength viscose fiber has high strength and fatigue resistance.
Viscose fiber is the basic composition of cellulose (C6H10O5) n o, ordinary viscose fiber cross-section of the sawtooth shape, leather core structure, vertical straight, there is groove across. The fiber rich leather core structure, the cross-section is round.
Viscose fiber chemical composition similar to cotton, so it is more alkali resistant than acid, but alkali, acid resistance are worse than cotton. The fiber has good alkali resistance and acid resistance. Similarly, the dyeability of viscose fiber is similar to that of cotton, and its dyeing and dyeing properties are good. In addition, the thermal properties of viscose fiber are similar to that of cotton, and the density is close to cotton 1.50~1.52g/cm3.Viscose fiber is one of the first chemical fibers to be put into industrial production. As a result of good moisture absorption, comfortable wearing, good spinnability, often blended with cotton, wool or synthetic fibers, used in various types of clothing and decorative textiles. High strength viscose fiber can also be used in tire cord, conveyor belt and other industrial products. Viscose fiber is a widely used chemical fiber.
Viscose fiber has good moisture absorption, and its moisture regain is about 13% in general atmospheric condition. Moisture absorption after significant expansion, the diameter is increased up to 50%, so the fabric hand feeling and hard water, high shrinkage rate.The breaking strength of ordinary viscose fiber is smaller than that of cotton, about 1.6~2.7cN/dtex; the elongation at break is greater than that of cotton; it is 16%~22%; the wet strength decreases much; it is about 50% of dry strength; and the wet elongation increases by about 50%. Its modulus is lower than that of cotton, it is easy to deform under small load, but has poor resilience. Therefore, fabric is easy to stretch and has poor dimensional stability. Rich in fiber strength especially wet than viscose, elongation is small, good dimensional stability. The abrasion resistance of ordinary viscose fiber is poor, while the fiber is improved.
