Aramid fiber is a new high-tech synthetic fiber, which has excellent properties such as ultra-high strength, high modulus, high temperature resistance, acid and alkali resistance, light weight, etc. Its strength is 5-6 times of that of steel wire, modulus is 2-3 times of that of steel wire or glass fiber, toughness is twice of that of steel wire, and weight is only about 1/5 of that of steel wire. It does not decompose or melt at 560 ℃. It has good insulation and anti-aging performance, and has a long life cycle.

Aramid fiber is an important material for national defense and military industry. In order to meet the needs of modern wars, the bulletproof clothing in developed countries such as the United States and Britain is made of aramid fiber. The lightweight of aramid bulletproof clothing and helmets effectively improves the rapid reaction ability and lethality of the military.