Explanation

cellulose acetate fiber is a kind of semi synthetic fiber materials that is spun from cellulose and acetic anhydride to produce cellulose acetate. It can be divided into diacetate and triacetate according to the degree of esterification. Diacetate fibers have a low degree of esterification and can be dissolved in acetone. Triacetate fibers have a high degree of esterification and are insoluble in acetone, but can be soluble in chloroform or dichloromethane. Different from viscose fiber, in cellulose acetate fiber, most or all of the hydroxyl groups on the cellulose ring are acetylated. The longitudinal direction of cellulose acetate fiber is smooth cylindrical with stripes, and the cross section is elliptical. Due to its low crystallinity and lateral degree, cellulose acetate fiber has poor fracture strength, even worse in wet state, but it has high fracture elongation, and elasticity recovery is obviously stronger than viscose fiber. The moisture absorption of cellulose acetate fiber is 6%~7% under standard conditions, and its expansibility in water is low. The finished product is easy to wash, and even when washed with hot water, it hardly shrinks. cellulose acetate fiber has good sun resistance, surpassing nylon, viscose fiber and cotton fiber. When heated, it first bating and deforms, then slowly combustion, and has combustion supporting properties.

Classification