1. Classification of plastics
Plastic is a general term for all plastic varieties and is widely used. Therefore, the classification methods are also different. According to the use, it can be divided into two categories: general-purpose plastics and engineering plastics.
General plastics such as polyethylene (PE), polypropylene (PP), polystyrene (PS), modified polystyrene (for example: SAN, HIPS), polyvinyl chloride (PVC), etc. These are the most widely used in daily life Material, performance requirements are not high, and cost is low.
2. Engineering Plastics
Engineering plastics refer to some plastics with industrial quality such as mechanical parts or engineering structural materials. Its mechanical properties, electrical properties, resistance to chemical environment, resistance to high temperature and low temperature, etc. have superior characteristics, and can even replace certain metals or other materials in engineering technology.
Common are ABS, polyamide (referred to as PA, commonly known as nylon), polycarbonate (PC), polyoxymethylene (POM), organic glass (PMMA), polyester resin (such as PET, PBT), etc., the first four developments The fastest, four internationally recognized engineering plastics.