Plastic classification

Plastics can be classified according to their own properties: thermoplastics that can be repeatedly melt-molded and can maintain their properties, and thermosets that can be melt-molded only once. According to their use, they can be divided into general-purpose plastics with a wide range of usage, low price, and good overall performance, such as PE, PP, PVC, PS, and amine-based plastics, which have good physical-mechanical strength and may be used instead of metals in construction machinery. Engineering plastics such as: ABS, nylon, polyester, POM, TPX-1, etc. And in a certain type of performance has a particularly good class of engineering plastics, such as: a particularly good radiation resistance, high temperature resistance and other special plastics, such as: polyarylsulfone, liquid crystal polymers. According to the molecular size of thermoplastic resin molecules, thermoplastics can be divided into two types: amorphous polymers and crystalline polymers.

The main features

The main characteristics of plastics are: First, the density is small, the specific strength is higher, and the higher packaging yield can be obtained, ie, the packaging volume or packaging area of unit mass. Second, most plastics have good chemical resistance. Good acid and alkali resistance, resistance to various types of organic solvents, long-term storage, no oxidation, thirdly, easy molding, less energy to be formed than steel and other metal materials, fourth, good transparency, easy colorability Fifth, it has good strength, high strength per unit weight, impact resistance and easy modification, sixth, low processing cost, and seventh, excellent insulation.