Engineering plastics can be divided into general engineering plastics and special engineering plastics. The former main varieties are polyamide, polycarbonate, polyoxymethylene, modified polyphenylene ether and thermoplastic polyester five general engineering plastics;
The performance characteristics of engineering plastics are mainly:
(1) Compared with general-purpose plastics, it has excellent heat resistance and cold resistance, and has excellent mechanical properties in a wide temperature range, and is suitable for use as a structural material;
(2) Good corrosion resistance, less environmental impact, and good durability;
(3) Compared with metal materials, it is easy to process, has high production efficiency, and can simplify procedures and save costs;
(4) Good dimensional stability and electrical insulation;
(5) Light weight, high specific strength, and outstanding friction and wear resistance.
