Nylon 66, also known as polyamide 66 (PA66), is obtained by polycondensation of hexamethylenediamine and adipic acid. It has good comprehensive performance, high strength, good rigidity, impact resistance, oil resistance and chemical resistance, wear resistance and self-lubrication, especially hardness, rigidity, heat resistance and creep performance, and easy to obtain raw materials. Low cost, so it is widely used in industries, clothing, decoration, engineering plastics and other fields. PA66 has a higher melting point than PA6, excellent heat resistance, high modulus of elasticity, and low water absorption. It is superior to PA6 as a molded product, especially because of its good heat resistance and oil resistance. Mechanical parts and parts of electrical and electronic products that are susceptible to heat. At present, PA66 has accounted for 63% of applications in vehicles, 22% in electrical and electronic and office automation equipment, and 5% in mechanical and optical applications.
