plastic is an almost colorless glassy amorphous polymer with good optical properties. PC high molecular weight resin has high toughness, cantilever beam notched impact strength is 600~900J/m, unheated grade has a heat distortion temperature of about 130 Â°C, and glass fiber reinforced can increase this value by Â°C. The flexural modulus of PC can reach more than 2400 MPa, and the resin can be processed into a large rigid product. Below 100 Â° C, the creep rate under load is very low. PC is poor in hydrolysis resistance and cannot be used to repeatedly process articles subjected to high pressure steam. PC materials are flame retardant, abrasion resistant and oxidation resistant. Polycarbonate is colorless, transparent, heat resistant, impact resistant, flame retardant BI grade, and has good mechanical properties at normal use temperatures. Compared with polymethyl methacrylate, polycarbonate has good impact resistance, high refractive index and good processing performance. It has UL94V-0 flame retardant performance without additives. However, polymethyl methacrylate is relatively inexpensive compared to polycarbonate and can be produced by bulk polymerization.
1, the main performance
a, mechanical properties: high strength, fatigue resistance, dimensional stability, creep is also small (very little change under high temperature conditions);
b, heat aging resistance: enhanced UL temperature index of 120 ~ 140 Â° C (outdoor long-term aging is also very good);
c, solvent resistance: no stress cracking;
d, water stability: easy to decompose in case of water (use caution in high temperature, high humidity environment);
e, electrical performance:
(1), insulation performance: excellent (wet, high temperature can also maintain stable electrical performance, is an ideal material for the manufacture of electronic and electrical parts);
(2), dielectric coefficient: 3.0-3.2;
(3), arc resistance: 120s
f, molding processability: ordinary equipment injection molding or extrusion. Due to the fast crystallization speed and good fluidity, the mold temperature is also lower than other engineering plastics. When processing thin-walled parts, it only takes a few seconds, and for large parts, it only takes 40-60s.
2, the application of polycarbonate
The application development of PC polycarbonate is to the direction of high recombination, high function, specialization and serialization. It has been launched for CD, car, office equipment, cabinet, packaging, medicine, lighting, film and other products. Grade grade.
Optical illumination: It is used to manufacture large lampshades, protective glasses, left and right eyepieces of optical instruments, etc. It can also be widely used for transparent materials on airplanes.
Electronics: Polycarbonate is an excellent E (120 Â° C) grade insulation material used in the manufacture of insulated connectors, coil frames, pipe sockets, bushings, telephone housings and parts, battery shells for miner's lamps, 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 films are also widely used as capacitors, insulating bags, audio tapes, color video tapes, and the like.
Mechanical equipment: used to manufacture a variety of gears, racks, worm gears, worms, bearings, cams, bolts, levers, crankshafts, ratchets, but also some mechanical equipment shells, covers and frames.
Medical equipment: cups, cans, bottles and dental instruments, medicine containers and surgical instruments that can be used for medical purposes, and even artificial organs such as artificial kidneys and artificial lungs.
Other aspects: used as hollow ribbed double-wall panels, greenhouse glass, etc. in textile industry; used as textile tube, textile machine bearing bush, etc.; used as bottle, tableware, toy, model, LED lamp housing and mobile phone case for daily use. .
As an alternative for the traditional wooden
skin SIPs (Structural Insulated Panels), CSIPs is more suitable for the area with high humidity and
severe terminate problems. CSIPs act as the framing, sheathing, insulation at the same
time, which greatly increase the construction speed, save
the onsite labor cost and result in
a more energy efficient and
cost effective system.
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