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[Chemical Knowledge]：What is polycarbonate? What are the classifications?

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1. what is polycarbonate?

polycarbonate (polycarbonate,PC is one of the commonly used thermoplastics synthesized from bisphenol A and oxychlorinated carbon (COCL2). The visible light transmittance of polycarbonate is close to 90%, so it is often used to build various films, lampshades, dial covers, optical lenses, plexiglass, etc.

2. polycarbonate classification

anti-static PC, conductive PC, plus fiber fire PC, anti-ultraviolet weather-resistant PC, food grade PC, anti-chemical PC.

3. polycarbonate properties

1. Mechanical properties: high strength, fatigue resistance, dimensional stability and small creep (little change under high temperature conditions);
2. Heat aging resistance: UL temperature index reaches 120~140 ℃ after strengthening (outdoor long-term aging is also very good);
3. Solvent resistance: no stress cracking;
4. Stability to water: it is easy to decompose when exposed to water at high temperature (care should be taken when used in high temperature and high humidity environment);
5. Electrical performance:
insulation performance: excellent (stable electrical performance can be maintained at high temperature and humidity, and it is an ideal material for manufacturing electronic and electrical parts);
Dielectric coefficient: 3.0-3.2;
arc endurance: 120s;
6. Molding: Injection molding or extrusion of common equipment.

4. polycarbonate uses

1, building materials industry: polycarbonate plate has good light transmission, impact resistance, resistance to ultraviolet radiation, product dimensional stability and good molding processing performance, than the traditional building inorganic glass has obvious technical performance advantages.

2, optical lighting: used in the manufacture of large lampshades, protective glass, optical instruments, etc., can also be widely used in aircraft transparent materials.

3. Electronic and Electrical Appliances: Polycarbonate is an excellent E(120 ℃) grade insulating material, which is used to manufacture insulating joints, coil frames, pipe seats, insulating sleeves, telephone shells and parts, miner's lamp battery shells, etc. It can also be used to make parts with high dimensional accuracy, such as optical discs, telephones, electronic computers, video recorders, telephone switches, signal relays and other communication equipment. Polycarbonate thin touch is also widely used as capacitors, insulating leather bags, audio tapes, color video tapes, etc.

4, mechanical equipment: used to manufacture various gears, racks, worm gears, worms, bearings, cams, bolts, levers, crankshafts, ratchets, and can also be used as some mechanical equipment shells, covers, frames and other parts.

5, medical equipment: cups, tubes, bottles, dental instruments, pharmaceutical containers, surgical instruments, and even artificial kidneys, artificial lungs and other artificial instruments, can be used for medical purposes.

6, optical lens: polycarbonate with its unique high light transmittance, high refractive index, high impact resistance, dimensional stability and easy processing molding, occupies an extremely important position in the field. Optical-grade polycarbonate optical lenses can be used not only for cameras, microscopes, telescopes and optical testing instruments, but also for film projector lenses, copier lenses, infrared auto focus projector lenses, laser beam printer lenses, various prisms, multi-faceted mirrors, etc. In the field of office equipment and household appliances, its application market is very broad.

7, other aspects: the building is used as hollow rib double wall plate, greenhouse glass, etc.; The textile industry is used as a textile tube, textile machine bearing, etc.; Used as a bottle, tableware, toys, models, LED lamp housing and mobile phone shell.

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