Plastics and their classification

         Plastics are synthetic polymer compounds, also known as polymers or macromolecules, commonly known as plastics or resins, which can freely change their shape. It is a material made from monomer raw materials through synthesis or condensation polymerization, and consists of synthetic resins and fillers, plasticizers, stabilizers, lubricants, pigments, and other additives.

Comparison of plastics with other materials
    〈1〉 Resistance to chemical attack       　　                 〈2〉Glossy, partially transparent or translucent　　
    〈3〉 Most of them are good insulators 　                      〈4〉 Lightweight and sturdy　　
    〈5〉 Easy to process, mass production, and low price  〈6〉 Widely used, versatile, easy to stain, and partially resistant to high temperatures 　

Properties and uses of commonly used plastics
         1.Polyethylene: Commonly used polyethylene can be divided into low density polyethylene (LDPE), high density polyethylene (HDPE), and linear low density polyethylene (LLDPE). Among the three, HDPE has better thermal, electrical, and mechanical properties, while LDPE and LLDPE have better flexibility, impact properties, and film forming properties. LDPE and LLDPE are mainly used for packaging film, agricultural film, plastic modification, etc., while HDPE is widely used in many fields such as film, pipe, injection daily necessities, etc.

         2. Polypropylene: Relatively speaking, polypropylene has more varieties and complex uses, with various fields. The main varieties include homopolypropylene, block copolymer polypropylene, and random copolymer polypropylene. According to the different uses, homopolypropylene is mainly used in fields such as wire drawing, fiber, injection, BOPP film, etc. Copolymer polypropylene is mainly used in household appliance injection parts, modified raw materials, daily injection products, pipes, etc, Random polypropylene is mainly used for transparent products, high-performance products, high-performance pipes, etc.

         3.PVC: Due to its low cost and self flame retardant properties, the product is widely used in the construction field, especially for sewer pipes, plastic steel doors and windows, plates, and artificial leather.

         4.Polystyrene: As a transparent raw material, it has a wide range of uses when there is a need for transparency, such as car lampshades, transparent parts for daily use, transparent cups, cans, and so on.

         5.ABS: It is a widely used engineering plastic with outstanding physical, mechanical, and thermal properties. It is widely used in household appliances, panels, masks, assemblies, and accessories, especially household appliances, such as washing machines, air conditioners, refrigerators, and fans, with a large amount of usage. In addition, in terms of plastic modification, it is also widely used. www.jiashengsz.com