Chinese alias: nylon 66 staple fiber; Nylon 66; Nylon 66 resin; Polyamide-66; Poly (hexamethylene adipamide); Nylon 66. Nylon 66 has high fatigue strength and stiffness, good heat resistance, low friction coefficient and good wear resistance, but high hygroscopicity and insufficient dimensional stability. Usually applied to medium load, using temperature &; lt； 100- 120 degree wear-resistant stress transmission parts work under the condition of no lubrication or less lubrication. Nylon 66 is poly (hexamethylene adipamide), and the industrial abbreviation is PA66. It is usually made into cylindrical particles, and the molecular weight of polyamide for plastics is generally1.50,000 ~ 20,000. The common characteristics of all kinds of polyamides are flame retardancy, high tensile strength (up to 104 kPa), wear resistance and good electrical insulation.