Polyamide-6, also known as polycaprolactam, has excellent wear resistance and self-lubricity, high heat resistance and mechanical strength, excellent low temperature performance, self-extinguishing, oil resistance, chemical resistance, good elasticity, high impact strength, excellent alkaline resistance, UV resistance and sunlight resistance. The disadvantage is large shrinkage and poor dimensional stability. In industry, it is used to manufacture bearings, gears, pulleys, transmission belts, etc., and can also be used for wire drawing, film making and other packaging materials.