What is plastic?2023-07-14
Plastics can be divided into general plastics, engineering plastics and special plastics according to their use. According to physical and chemical classification can be divided into thermosetting plastics, thermoplastic plastics two types; According to the molding method classification can be divided into molding, laminating, injection, blow molding, extrusion, casting plastic and reaction injection plastic and other types. 1, general plastic: usually refers to large output, wide use, good formability, cheap plastic. There are five varieties of general purpose plastics, namely polyethylene and polypropylene. 1, general plastic: usually refers to large output, wide use, good formability, cheap plastic. There are five major types of general plastics, namely polyethylene, polypropylene, polyvinyl chloride, polystyrene, acrylonitrile-butadiene-styrene copolymer. 2, engineering plastics: can withstand a certain external force, has good mechanical properties and resistance to high and
