Character Of Aramid Fiber
1. Good mechanical properties
Interposition aramid is a flexible polymer with higher breaking strength than ordinary polyester, cotton, nylon, etc. It has higher elongation, soft handle and good spinnability. It can produce short fibers and filaments of different sizes and lengths. It can be woven into fabrics and non-woven fabrics from different yarns in general textile machinery. After finishing, it meets the requirements of protective clothing in different fields.
2. Excellent flame retardancy and heat resistance
The limiting oxygen index (LOI) of meta-aramid is greater than 28, so it will not continue to burn when it leaves the flame. The flame retardant properties of meta-aramid fibers are determined by their chemical structure, so they are permanent flame retardant fibers and will not be reduced or lost due to the use time and washing times. Newsday & reg; meta-aramid fibers have good thermal stability and can be used continuously at 205 (?) C, but still maintain high strength at higher temperatures than 205 (?). Newsday & reg; meta-aramid fibers have high decomposition temperature, and do not melt or melt at high temperature. Carbonization begins when the temperature is higher than 370 (?)
3. Stable Chemical Properties
Meta-aramid fibers have excellent resistance to most chemicals, most inorganic acids with high concentration, and good alkali resistance at room temperature.
4. Radiation resistance
The radiation resistance of meta-aramid fibers is excellent. For example, the intensity of ultraviolet radiation at 1.2 x 10-2 w/in 2 and gamma rays at 1.72 x 108 rads remained unchanged for a long time.
Inter-position aramid has excellent friction and chemical resistance. After 100 washings, the tear strength of fabric processed with Inter-position aramid can still reach 85% of its original strength.
The temperature resistance of para-aramid fibers is higher than that of meta-aramid fibers. The continuous use temperature ranges from - 196 C to 204 C. It does not decompose or melt at 560 C. Para-aramid fiber has the most remarkable characteristics of high strength and high modulus. Its strength is more than 25 g/d, which is 5-6 times of high-quality steel, 3 times of glass fiber and 2-3 times of high-strength nylon industrial yarn. Its modulus is 2-3 times of high-quality steel or glass fiber and 10 times of high-strength nylon industrial yarn.
Aramid pulp is obtained after surface fibrillation of aramid fibers. Its unique surface structure greatly improves the adhesion of the mixture, so it is very suitable for use as a reinforcing fiber in friction and sealing products.