Explanation

plastics is a kind of plastic raw material made of resin and additive such as filler, plasticizer, stabilizer, lubricant and pigment. It presents a solid shape when it is finished with T. In the process of manufacturing and processing, it can be molding with flow ability and plasticity. It can be processed and molded by compression molding (press molding), extrusion molding (extrusion molding), injection molding (injection molding), blow molding (hollow molding), calendering and other methods. According to different use characteristics, plastics can be divided into general purpose plastics and engineering plastics. According to different physical and chemical properties, plastics can be divided into thermosetting plastics and thermoplastic plastics. Most plastics have strong corrosion resistance and do not react with acids and alkalis. plastics has low manufacturing cost. Durable, waterproof, and lightweight. Easily affected by_ Make different shapes. It is a good insulator, but it also has its disadvantages. For example, most plastics products have poor strength, poor heat resistance, and are easy to combustion. Some plastics will produce toxic gases when combustion. Most plastics waste is not easy to decay and decompose, resulting in environmental pollution. It is easy to aging during use, resulting in reduced performance, etc. At present, plastics has been widely used in industry, agriculture, construction, packaging, national defense cutting-edge industry and people's daily life and other fields.

Classification