Engineering plastics has many characteristics, including low density and high strength, resistance to corrosion and chemical erosion, heat insulation, high heat resistance, long-term use without deformation, low expansion coefficient, wear resistance can be improved without lubrication, as well as low noise and other properties, which is normally available to replace metal, glass, copper, aluminum, steel and other parts. Engineering plastic is commonly used as industrial plastics for industrial parts or shell materials, and it is excellent in strength, impact resistance, heat resistance, hardness and aging resistance.