The predominant cellulose ester fiber is cellulose acetate, a partially acetylated cellulose, also called acetate or secondary acetate. It is widely used in textiles because of its attractive economics, bright colors, and styling versatility. It is environmentally friendly and hypoallergenic.
Its largest use is as the fibrous material in cigarette filters where its smoke removal properties and contribution to taste make it the standard in the industry. The second largest use is in textiles. Cellulose triacetate, also known as primary cellulose acetate, is an almost completely acetylated cellulose. Although it has fiber properties that are different, and in many ways better than cellulose acetate, it is of lower commercial significance primarily because of environmental considerations in fiber preparation. Manufacture details for the acetate and triacetate are given. Products include yarns and fibers, yarn packages, staple and tow, and fibrillated fibers.