Aramid fiber generally refers to aramid fiber. Aramid (Nomex is a kind of aramid fiber, which is m-phthaloyl-p-phenylenediamine) is a new type of high-tech synthetic fiber. It has excellent properties such as ultra-high strength, high modulus, high temperature resistance, acid and alkali resistance, light weight, insulation, aging resistance and long service life, and is widely used in composite materials, bulletproof products, building materials, special protective clothing, electronic equipment and other fields.

Aramid fiber, called "poly (p-phenylene terephthalamide)" in English, is a new type of high-tech synthetic fiber with excellent properties such as ultra-high strength, high modulus, high temperature resistance, acid and alkali resistance and light weight. Its strength is 5-6 times that of steel wire, its modulus is 2-3 times that of steel wire or glass fiber, its toughness is 2 times that of steel wire, and its weight is only about 1/5 of steel wire. Good insulation performance, aging resistance and long service life. The discovery of aramid fiber is considered to be a very important historical process in the field of materials.