Application Scope And Characteristics Of Viscose Fiber

Cellulose regenerated fibers Acetate fiber (including two acetate fiber and three acetate fiber), their dyeing properties are significantly inferior to viscose fiber. This is due to the acetylation of most hydroxyl groups (OH) of acetate molecules into hydrophobic groups. Therefore, viscose fiber and cotton dyes can not be used. It can be seen that viscose fiber is also the best and easy to dye in cellulose fiber, and the cost of printing and dyeing is also low. Viscose fibers also have deficiencies in printing and dyeing, such as cellulose fibers such as cotton, which can be widely used reactive dyes. Although reactive dyes can replace some harmful chemical dyes, they produce more colored sewage in the printing and dyeing process. In addition, viscose fiber in some printing and dyeing fastness and light fastness is not as good as some synthetic fibers. Although this is related to the properties and process of dyes, viscose fiber is easy to be dyed, its chromatogram is whole, its color is bright, and its cost is low.

Viscose fiber is one of the earliest chemical fibers that have been put into industrial production. Because of its good moisture absorption and comfortable wearing, it has good spinnability and is often blended and interwoven with cotton, wool or all kinds of synthetic fibers for all kinds of garments and decorative textiles. High strength viscose fiber can also be used for tire cord, conveyor belt and other industrial supplies. Viscose fiber is a widely used chemical fiber.

　　 Viscose fiber The basic composition is cellulose (C6H10O5) No. The section of ordinary viscose fiber has a zigzag skin core structure. It is a more comprehensive textile fiber material, which can be purified according to different needs. The hygroscopic properties of viscose are closely related to dyeing properties and fiber contains a large number of hydroxyl groups (OH). Hydroxyl (OH) groups adsorb large amounts of water molecules or other molecules. The better the fiber with better hygroscopicity is, the better the dyeing performance is. Viscose fiber has undergone many physical and chemical reactions during the manufacturing process, resulting in the cracking of cellulose macromolecules, resulting in shorter macromolecules and vertical vertical grooves. The structure is rich in fiber and no skin core, and the section is round.

The breaking strength of ordinary viscose fiber is smaller than that of cotton, about 1.6~2.7cN/dtex, elongation at break is greater than cotton, 16%~22%, wet strength decreases much, about 50% of dry strength, and wet elongation increases by about 50%. Its modulus is lower than cotton, easy to deform under small load and poor resilience, so fabric is easy to elongate and poor dimensional stability. The strength of the rich fiber, especially the wet strength is higher than that of the ordinary viscose, the elongation at break is small, and the dimensional stability is good. The wear resistance of ordinary viscose is poor, while that of rich viscose is improved.

The chemical composition of viscose fiber is similar to that of cotton, so it is more alkali resistant and acid proof, but its alkali resistance and acid resistance are all inferior to that of cotton. Rich fiber has good alkali resistance and acid resistance. Similarly, the dyeing property of viscose fiber is similar to that of cotton. In addition, the thermal properties of viscose fibers are similar to those of cotton, and the density is close to cotton 1.50~1.52g/cm3.

　　 cellulose The hydroxyl groups of macromolecules are prone to occur many chemical reactions. Therefore, viscose fibers can be modified by grafting and other methods to improve viscose fiber properties and produce fibers of various special uses.