Do you know what three types of plastic products materials are classified?

 

Material classification of plastic products

Many people know that plastic products are made of plastic, but there are also many kinds of materials for plastic products. Let me sort out the following three types for you:

According to the scope of application can be divided into: general plastics, engineering plastics, special engineering plastics

 

1. General plastics for plastic products

1. General plastic, a kind of plastic with large output, wide use and low price. Mainly including PE(polyethylene), PP(polypropylene), PVC(polyvinyl chloride), PS(polystyrene), PF (phenolic plastic) and amino plastics. Their combined production accounts for more than 75% of total plastic production. Many plastic products used in our daily life are made of these universal plastics.

 

Plastic products

 

Second, plastic products engineering plastics

 

 

 

2, engineering plastics, long-term use temperature in 100-150 degrees. It can withstand enough external force, has good mechanical properties and dimensional stability, and can maintain its excellent performance at high and low temperatures. It can be used as a plastic for engineering structural parts. Because of their high mechanical strength or high temperature resistance, corrosion resistance, radiation resistance and other special properties, it can be used as a substitute for metal for some parts or other special purposes. Commonly used are PC(polycarbonate), PA(polyamide), POM(polyformaldehyde), PSF (polysulfone), ABS, PPS(polyphenylene sulfide), CP(chlorinated polyether), PET(polyethylene terephthalate), PBT(polyethylene terephthalate), UHMWPE(high relative molecular weight polyethylene), EP(epoxy resin) Phenolic - epoxy resin and PU(polyurethane), etc. The tensile strength of engineering (and special) plastics is generally above 50MPa, the bending modulus is above 2GPa, and the impact strength can be up to 60J/m. Engineering plastics have the characteristics of low density, high chemical stability, good mechanical properties, superior electrical insulation, easy processing and forming, and are widely used in automobile, electrical appliances, chemical industry, machinery, instruments, meters and other industries

 

Body temperature gun

 

Three, silicone products special plastic

 

 

3, special engineering plastics, long-term use temperature above 150 degrees. Plastics with high mechanical strength and heat resistance, or with special functions, and can meet the requirements of special applications. According to whether the polymer is crosslinked or not, it can be divided into crosslinked and fee-crosslinked special engineering plastics. The commonly used cross-linked special engineering plastics are polyamino-bismaleamide, polytriazine, cross-linked polyimide, heat-resistant epoxy resin, etc. Commonly used non-crosslinked fluorine plastics, organosilicon, polyphenylene sulfide, polyphenyl ester, polyetheretherketone and polybenzo imidazole zuo. Total: PES(polyether sulfone), PPS(polyphenyl sulfide), PAR(polyaryl ester), PAI(polyamide-imide), PEI(polyether imide), PEEK(polyether ether ketone), PI(polyimide), LCP(liquid crystal polymer). high performance plastics, super engineering plastics. Its main application fields are aerospace industry, defense industry, electronics, electrical appliance industry and machinery manufacturing industry, especially the automobile industry. It is used as a structural material in rockets, satellites, aerospace, electrical appliances, automotive industries, finished products, medical devices and sports equipment where adequate mechanical properties at high temperatures are required.

As for how much plastic there is, it is impossible to answer the question. It's just too much. Price, general plastics are cheaper, about a dozen pieces of a kilogram, special engineering plastics are more expensive, about a few hundred pieces of a kilogram, and the volume is also less, many times there is no market price.