Polycarbonates (PC) are a group of thermoplastic polymers containing carbonate groups in their chemical structures. Polycarbonates used in engineering are strong, tough materials, and some grades are optically transparent. They are easily worked, molded, and thermoformed. Because of these properties, polycarbonates find many applications. Polycarbonates do not have a unique resin identification code (RIC) and are identified as "Other", 7 on the RIC list. Products made from polycarbonate can contain the precursor monomer bisphenol A (BPA).
The main advantage
1. With high strength and elasticity coefficient, high impact strength, wide temperature range;
2. High transparency and free dyeability;
3. Low forming shrinkage and good dimensional stability;
4. Good fatigue resistance;
5. Good weather resistance;
6. Excellent electrical characteristics.
Main performance
1. Mechanical properties: high strength, fatigue resistance, dimensional stability, and small creep (very few changes under high temperature conditions);
2. Heat aging resistance: the enhanced UL temperature index reaches 120~140℃ (long-term outdoor aging is also very good);
3. Solvent resistance: no stress cracking;
4. Water stability: it is easy to decompose in water at high temperature (use caution in high temperature and high humidity environments);
5. Electrical performance:
6. Insulation performance: excellent (humidity and high temperature can maintain stable electrical performance, it is an ideal material for manufacturing electronic and electrical parts);
7. Dielectric coefficient: 3.0-3.2;
8. Arc resistance: 120s;
9. Molding processability: ordinary equipment injection or extrusion.
The three major application areas of PC engineering plastics are glass assembly industry, automobile industry and electronics and electrical appliances industry, followed by industrial machinery parts, optical discs, packaging, computers and other office equipment, medical and health care, films, leisure and protective equipment. PC can be used as door and window glass. PC laminates are widely used in protective windows in banks, embassies, detention centers and public places, as well as aircraft cabin covers, lighting equipment, industrial safety baffles and bulletproof glass.
