PC is a linear carbonic acid polyester. The carbonic acid groups in the molecule are alternately arranged with other groups. These groups can be aromatic, aliphatic, or both. PC can be used as low-load parts for household appliances motors, vacuum cleaners, shampoos, coffee makers, toasters, power tool handles, various gears, worm gears, shaft sleeves, guides, refrigerator shelves. PC is an ideal material for CD storage media. PC polycarbonate occupies an extremely important position in this field due to its unique characteristics of high light transmittance, high refractive index, high impact resistance, dimensional stability and easy processing and molding. The application and development of polycarbonate is developing in the direction of high-composite, high-functional serialization, and various grades of products such as optical discs, automobiles, office equipment, boxes, packaging, lighting, and films have been introduced.