Engineering plastic products are widely used in machinery, chemical, automobile, railroad, electricities and other industries. It has features such as uniform viscosity, high strength, good toughness, low ash content, low moisture content. Its viscosity index is 2.7~2.8, melting point is 265℃, molecular weight is 16000-19000. It has excellent wear resistance, self-lubricating property, heat resistance and high mechanical strength.