Polyacrylonitrile modified fiber is also called modified polyacrylonitrile fiber. Synthetic fiber made of linear polymer copolymer containing 35%~85% acrylonitrile monomer. The United Carbide Company of the United States began its industrial production in 1948, with the trade name Dynel.

Acrylic fiber is called artificial wool. It has the advantages of softness, bulkiness, easy dyeing, bright color, light resistance, anti-bacterial, and worm resistance. It can be pure spun or blended with natural fibers according to the requirements of different uses. Its textiles are widely used in clothing, decoration, industry and other fields.