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The difference between engineering plastic and general plastic: definition, characteristics and main varieties

October 10, 2023

Classification Definition Characteristic Main varieties
Engineering plastic Generally used in the industrial field as structural parts, it is a plastic with excellent strength, impact resistance, heat resistance, mechanical strength and aging resistance, and can withstand large mechanical stress in a wide temperature range. 1. It has high thermal deformation temperature, can be used at high temperatures (greater than 100 degrees) for a long time, and has a small thermal expansion coefficient.
2. High strength, high hardness, high toughness, wear resistance, fatigue resistance, and deformation resistance. It is mainly used in automobiles, aerospace, construction, engineering equipment and other fields.
3. Chemical resistance, insulation, combustion resistance, weather resistance, and dimensional stability.
Nylon PA, polycarbonate PC, polyoxymethylene POM, polybutylene terephthalate PBT, polyphenylene ether PPO.
General plastic Generally refers to plastics with large output, wide range of uses, good formability and low price. 1. The heat distortion temperature is generally below 100°C, and it is generally used at room temperature or in an environment where the temperature does not exceed 70°C.
2. The mechanical strength is not as good as that of engineering plastics, but it also has a good balance of rigidity and toughness. It is mainly used in home appliances and electronic products.
3. It has certain chemical resistance. Most materials have poor weather resistance and combustion resistance.
Polyethylene PE, polypropylene PP, polyvinyl chloride PVC, polystyrene PS, acrylonitrile-styrene-butadiene copolymer ABS.