Kevlar cord's advantage

Aramid is a new type of high-tech synthetic fiber, which also has excellent properties such as ultra-high strength, high modulus, high temperature resistance, acid and alkali resistance, and light weight. Under the temperature of 560 ℃, it does not decompose or melt, has good insulation and anti-aging properties, and also has a long life cycle. Aramid fiber is a very important national defense and military material, very suitable for the needs of modern warfare. At present, aramid products account for about 7-8% of bulletproof vests, helmets, etc., aerospace materials and sports materials account for about 40%; tire frame materials and conveyor belt materials account for about 20%, and high-strength materials account for about 20%. Ropes and other aspects account for about 13%.

①. In terms of mechanical properties, the tensile strength of aramid fiber can reach 2815Mpa, the elastic modulus is 126Gpa, the elongation at break is 2.5%, and the density is 1.44g/cm^3, which is slightly inferior to the strength of carbon fiber, but the aramid fiber is significantly stronger. Features include impact resistance, higher elongation, and lighter weight.

②. In terms of stability, aramid has very good thermal stability. It can be decomposed under high temperature without deformation. It can be used at 180 °C for a long time, and the strength and modulus will not change after a week of action at 150 °C. , the thermal expansion coefficient is -2x10^-6

③. In terms of the Thermochemical properties, aramid has good medium resistance and strong resistance to neutral chemicals, but is easily attacked by strong alkalis and acids.