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　　1. Classification by resin properties.

　　2. Thermoplastics: plastics that can be repeatedly heated, softened, and cooled and hardened within a specific temperature range. Such as polyethylene plastic, PVC plastic.

　　3. Thermosetting plastics: plastics that can be cured into insoluble materials due to heat or other conditions. Such as phenolic plastic, epoxy plastic, etc.

　　4. It is classified according to the use scale of plastics.

　　5. General purpose plastics: refer to plastics with large output, wide use, good formability and low price. Such as polyethylene, polypropylene, polyvinyl chloride, etc.

　　6.engineering plastic: refers to the plastic that can accept certain external force, has good mechanical properties and dimensional stability, can maintain its excellent performance at high and low temperatures, and can be used as engineering structural parts. Such as ABS, nylon, poly alum, etc.

　　7. Special plastics: generally refer to plastics with special functions (such as heat resistance, self lubrication, etc.) and applied to special requirements. Such as fluoroplastics, organosilicon, etc.

This article is from Jiangmen engineering plastic:http://www.hhaifeng88.cn/