Polyacrylonitrile fiber

Polyacrylonitrile fibers have properties very similar to wool, with good elasticity; at a 20% elongation, the recovery rate is still 65%. They are fluffy, curly, and soft, offering 15% better warmth retention than wool, and are known as synthetic wool. The strength ranges from 22.1 to 48.5 cN/tex, up to 1 to 2.5 times higher than that of wool. They have excellent resistance to sunlight, with strength only dropping by 20% after a year of outdoor exposure, making them suitable for curtains, drapes, tents, and coverings. They are resistant to acids, oxidizers, and most organic solvents, but have poor resistance to alkalis. The softening temperature of the fiber is between 190°C to 230°C.