There are mainly two types of modified polyacrylonitrile fibers produced in the recent industrial production: fibers made of copolymer of acrylonitrile and vinyl chloride; The fiber is made of the copolymer of acrylonitrile and vinylidene chloride, namely vinylidene chloride polyacrylonitrile fiber. These two types of modified polyacrylonitrile fibers are sometimes collectively referred to as nitrile chloride fibers, which have good flame retardancy.

Polyacrylonitrile fiber can be blended with wool to form wool, or woven into blankets, carpets, etc. It can also be blended with cotton, man-made fibers, and other synthetic fibers to form various clothing materials and indoor articles. The expanded body processed by polyacrylonitrile fiber can be pure spun or blended with viscose fiber.