In daily life, most of the plastics that we can directly touch or perceive are conventional general-purpose plastics, mainly including five categories: PE, PP, ABS, PVC, PS, these five categories of plastics account for the vast majority of plastic raw materials. , The rest can basically be classified into special plastic varieties, such as: PPS, PPO, PA, PC, POM, etc., they are used in daily life products very little, and are mainly used in high-end fields such as engineering industry and national defense technology, such as Automotive, aerospace, construction, communications and other fields. According to its plasticity classification, plastics can be divided into thermoplastics and thermosetting plastics. Under normal circumstances, thermoplastic products can be recycled, while thermosetting plastics cannot. According to the optical properties of plastics, they can be divided into transparent, translucent and opaque raw materials, such as PS, PMMA, AS, PC, etc. which are transparent plastics , And most other plastics are opaque plastics.