Polyamide plastic products are widely used in a variety of mechanical and electrical parts, including bearings, gears, pulley pump
impeller, blade, high pressure sealing ring, cushion, seat, bushing, oil pipeline, storage device, rope, transmission belt,
grinding wheel adhesive, battery box, electrical coil, cable joint, etc. There is also a large amount of packaging tape and food
film (high temperature film for cooked food and low temperature film for cool drinks). The United States Monsanto company
developed for reaction injection molding polyamide plastic, also known as RIM nylon, is very popular in many countries, some
countries made glass reinforced RIM nylon large automobile shell parts, so that polyamide in the competition with metal materials,
in the automobile manufacturing industry to reduce weight, energy saving and reduce costs to find another way.
The main varieties of polyamide fiber (aliphatic) are nylon 66 and nylon 6, the latter is also known as nylon. They have high
strength, good resilience and highest wear resistance among textile fibers. Their resistance to multiple deformation and fatigue
is close to that of polyester and higher than other fibers. They have good temperature absorption, but poor light and heat
resistance. Polyamide fiber filament can be made into socks, underwear, shirts, sweatshirts, ski shirts, raincoats, etc. Staple
fibers can be blended with cotton, wool and viscose fibers to give fabrics good wear resistance and strength. It can also be used
as Velcro, carpet, decorative cloth, etc. Industry is mainly used in the manufacture of cord cloth, conveyor belt, fishing nets,
cables, etc.
Aromatic polyamide fiber is a special fiber, the main varieties are para-aromatic polyamide fiber and interaromatic polyamide
fiber. The former is characterized by high strength (5 ~ 6 times of steel wire), high modulus (2 ~ 3 times of steel wire), low
specific gravity (1/5 of steel wire), its high temperature resistance, chemical corrosion resistance, but poor UV resistance. It
is used as tire cord for high-speed aircraft, special cable for deep sea operation and aerospace. The latter is characterized by
high temperature resistance, flame resistance, self-extinguishing, good aging resistance, but poor UV resistance. Work clothes,
space suits and fire suits for flammable and explosive environment. Paper made from it is widely used in electrical insulation