The bottom of the cup labeling arrow triangle in the 58 represents the PC, this is the new standard in 2008 [GB/T 16288-2008] in the provisions.
Polycarbonate (pc) is a molecular chain containing carbonate-based polymers, according to the structure of the ester group can be divided into aliphatic, aromatic or aliphatic aromatic. Among them, aliphatic and aliphatic-aromatic polycarbonates have low mechanical properties, limiting their application in engineering plastics.
Expanded Information:
The use of PC plastics:
1, optical lighting
Used in the manufacture of large-scale lampshades, goggles, optical instruments, such as the left and right eyepieces tube, can also be widely used for transparent materials on the airplane.
2, electrical and electronic
Polycarbonate is an excellent E (120 ° C) level insulating materials, used in the manufacture of insulated connectors, coil frames, tube holders, casing, telephone shells and parts, battery shells of miner's lamps and so on.
Also used in the manufacture of high dimensional accuracy parts, such as optical disks, telephones, electronic computers, video recorders, telephone exchanges, signal relays and other communications equipment. Polycarbonate thin touch is also widely used as capacitors, insulating bags, adhesive tape, color video tapes and so on.
3, mechanical equipment
Used in the manufacture of a variety of gears, racks, worm gears, worm gears, bearings, cams, bolts, levers, crankshafts, ratchets, and mechanical equipment shells, covers and frames and other parts.
4, medical equipment
Cups, cans, bottles, dental instruments, pharmaceutical containers and surgical instruments can be used for medical purposes, and even artificial organs, such as artificial kidneys and artificial lungs.
5, other aspects
The building is used as double-wall hollow ribbed panels, greenhouse glass, etc.; textile industry as textile tubes, textile machine bushings; daily bottles, tableware, toys, models, LED lampshades, cell phone covers and so on.
Baidu Encyclopedia - Polycarbonate