Kevlar 1414 fiber is woven from raw materials. It is a new type of composite high-performance webbing. It has high strength (more than 28g/dan), 5-6 times higher than high-quality steel, modulus 2-3 times higher than steel or glass fiber, toughness 2 times higher than steel, and weight 1/5 of steel. The continuous use temperature range of aramid fiber is wide, and it can operate normally for a long time in the range of - 196 ℃ to 204 ℃. The shrinkage rate is 0 at 150 ℃, it does not decompose and melt at 560 ℃, and has good insulation and corrosion resistance, with a long life cycle.