The so-called functional fibers are made by adding certain special materials, developing new polymers, or adopting new spinning techniques, so that the resulting fibers have such properties as conductivity, flame retardance, radiation resistance, anti-ultraviolet radiation, sterilization, and absorption of solar energy. , light, health and other special functional fiber raw materials.

Compared with high-performance fibers, functional fibers emphasize the use of functions. Functional fibers have long been widely used in the nonwovens field. For example, hydrophilic polypropylene staple fibers can be made into medical dressings, adult incontinence and care products, etc. by dry-laid, needle-punched or heat-bonded consolidation. Material and container, window glass, water-absorbing material, etc.