Thermoplastics are the most widely used plastics. They are made into plastics with the main components of thermoplastic resins and various additives. Under certain temperature conditions, plastics can be softened or melted into any shape, and the shape will not change after cooling; this state can be repeated many times and always has plasticity, and this repetition is just a physical change. This plastic is called thermoplastic plastic.
Including polyethylene PE, polypropylene PP, polyvinyl chloride PVC, polystyrene PS, polyoxymethylene PPO, polycarbonate PC, polyamide, acrylic plastics, other polyolefins and their copolymers, polysulfone, polyphenylene ether.
1 General Plastic
General-purpose plastics mainly include polyethylene, polypropylene, polyvinyl chloride, polystyrene, ABS (acrylic-butadiene-styrene), polymethyl methacrylate and amino plastics, etc., whose output accounts for the entire plastics output More than 90%, so it is also called a bulk plastic variety.
2 Engineering Plastics
It refers to plastics that can be used as structural materials. It is not the same as general-purpose plastics. There is a clear boundary. Engineering plastics have relatively good strength, impact resistance, heat resistance, hardness and aging resistance, and can replace some metal materials. Engineering Materials.
3 special plastics
Refers to those plastics with special functions and suitable for certain special occasions, mainly medical plastics, photosensitive plastics, magnetically conductive plastics, superconducting plastics, radiation resistant plastics, high temperature resistant plastics, etc. The main component is resin, and some are specially synthesized Resin.