Plastic injection molding process is one of the four major engineering materials (steel, wood, cement and plastic). It is widely used in industry, agriculture, national defense and other fields, mainly composed of high content of synthetic resin. But compared with other materials, plastic has its unique properties, which determine its unique use place, processing method, production process, etc

Types of plastics

According to thermal properties, plastics are divided into thermosetting and thermoplastic. The difference between the two plastics is usually whether there is chemical reaction and hardening after heating at a certain temperature for a period of time or adding a hardening agent. Chemical reaction and hardening are called thermosetting plastics, otherwise they are called thermoplastic plastics

Large plastic injection processing can be divided into general plastics, engineering plastics and functional plastics according to basic properties. Polyethylene is mainly used in general plastics (PE), polypropylene (PP), polyethylene (PS), polyvinyl chloride (PVC) and ABS. It is characterized by large output, low price and general performance. Engineering plastics mainly include polyamide (PA), polycarbonate (PC), polyformaldehyde, polyphenyl ether, etc. It has excellent mechanical properties, electrical properties, chemical properties, heat resistance, wear resistance and dimensional stability. The production of engineering plastics is relatively small and expensive. Functional plastics mainly include medical plastics, photosensitive plastics, etc., which have special functions