Explanation

It mainly refers to synthetic fiber with outstanding physical, mechanical and thermal properties, also known as special fiber. According to performance, it can be divided into high strength and high modules fiber, high-temperature resistant fiber, antiflame fiber, strong corrosion resistant fiber, etc. high strength and high modules fiber is the top of all fibers in terms of tensile strength and modulus, and its specific strength and specific modulus are extremely high; High temperature resistant fiber ranks first in terms of thermal aging resistance of man-made fiber. Some of these fibers also have certain flame retardancy, radiation resistance, acid and alkali resistance, corrosion resistance and organic solvent resistance. Organic high-performance fibers are mostly prepared by low temperature solution polycondensation and dry, wet or dry jet wet spinning; The high performance fiher of inorganic polymer are mostly made of organic precursor fibers (such as polyacrylonitrile precursor, pitch fiber, polycarbosilane, etc.) after several steps of high temperature heat treatment. Some fibers use traditional spinning technology to spin linear or low molecular weight fibers first, and then cyclization, crosslinking, metal chelation, high temperature heat treatment, surface physical chemistry treatment or plasma treatment are respectively carried out to prepare finished fibers; others need to use new spinning processes such as lotion spinning, reactive spinning, liquid crystal spinning, phase separation spinning, high-speed airflow melting jet and special composition spinning technology. It is mainly used to prepare high-performance composite materials, tires and rubber framework materials, cables, asbestos substitutes, sporting goods, protective clothing, gas-liquid filter materials, insulation and thermal insulation materials, friction and braking materials, optical cable reinforcement cores and new building materials. Its application fields are very wide.

Classification