Explanation

It refers to fibers with long-term use temperature above 200 ℃, high melting point and softening point, difficult degradation at high temperature, good dimensional stability, and certain resistance to hydrolysis and chemicals. Most of them are aromatic heterocyclic fibers, such as meta aromatic amide, polyarysulfone amide, polyazole, thiazole and imidazole, polyarysulfone, polyarylimide fiber, etc. These fibers have both good flame retardancy and self-extinguishing properties. Polyarylimides and imidazoles also have radiation resistance, while polyphenylene ethers can withstand ultra-high voltages. Its preparation methods are mainly low temperature solution polycondensation and wet spinning, some are dry spinning, and some are subject to high-temperature cyclization after treatment. High temperature resistant fiber is mainly used to prepare various protective clothing, including fire-fighting clothing, racing clothing, welding clothing, protective covers and gloves; Electrical insulation materials resistant to above 18O ℃; Special parachutes; High temperature dust and acid and alkali resistant filter materials; Honeycomb structural materials and blended clothing, etc.

Classification