What is the material of ALDC 12?

Polycarbonate, the Chinese name is polycarbonate.

Polycarbonate is a thermoplastic resin with -[o-r-o-co]- bond in its molecular main chain. According to the different ester groups in its molecular structure, it can be divided into three categories: aliphatic, alicyclic and aliphatic-aromatic. Among them, aromatic polycarbonate has practical value, and bisphenol A polycarbonate is the most important, with a molecular weight of 30-65438+ million. PC is amorphous. Small creep and stable size; It has good heat and low temperature resistance, stable mechanical properties, dimensional stability, electrical properties and flame retardant properties in a wide temperature range, and can be used for a long time at 60~ 120℃; It has no obvious melting point and is in a molten state at 220-230℃. Due to the high rigidity of molecular chain, the viscosity of resin melt is high; Small water absorption, small shrinkage, high dimensional accuracy, good dimensional stability and low film permeability; It is a self-extinguishing material; Stable to light, but not resistant to ultraviolet rays and good weather resistance; Oil-resistant, acid-resistant, alkali-resistant, oxidizing acid, amine, ketone, soluble in chlorinated hydrocarbons and aromatic solvents, easy to hydrolyze and crack in water for a long time. The disadvantages are poor fatigue strength, poor solvent resistance, poor wear resistance and easy stress cracking. PC can be injection-molded, extruded, molded, blow-molded, thermoformed, printed, bonded, coated and machined, and the most important processing method is injection molding. Before molding, a little water must be treated at high temperature, and the product will produce white, silver lines and bubbles. PC has considerable room temperature forced high elastic deformation ability and high impact toughness, so it can be cold formed, such as cold pressing, cold drawing and cold rolling. The molecular weight of PC for extrusion should be greater than 30,000, and the screw is gradually compressed, with the length-diameter ratio of 1: 18 ~ 24 and the compression ratio of 65,434. Injection-blowing method and injection-drawing-blowing method are used to form bottles with high quality and transparency. There are many kinds of PC alloys, which can improve the defects of high viscosity (processability) of PC melt and easy stress cracking of products. Polycarbonate and different polymers form alloys or blends to improve material properties. Specifically, there are PC/ABS alloy, PC/ASA alloy, PC/PBT alloy, PC/PET alloy, PC/PET/ elastomer blend, PC/MBS blend, PC/PTFE alloy, PC/PA alloy and so on. It has the advantages of both materials and reduces the cost. For example, in PC/ABS alloy, PC mainly contributes to high heat resistance, good toughness and impact strength, high strength and flame retardancy, and ABS. Reduce the density. The three major application fields of PC are glass assembly industry, automobile industry and electronic appliance industry, followed by industrial machinery parts, compact discs, packaging, computers and other office equipment, medical care, films, leisure and protective articles. PC can be used as window glass, and PC laminate is widely used as protective windows in banks, embassies, detention centers and public places, as well as aircraft cabin covers. Lighting equipment, industrial safety baffle and bulletproof glass. PC board can be used as various signs, such as gasoline pump dial, automobile dashboard, warehouse and outdoor commercial signs, point slip indicator, PC resin for automobile camera system, dashboard system and interior system, front lampshade, reinforced automobile front and rear fender, mirror frame, door frame cover, joystick cover, spoiler and PC for junction box, socket, plug and sleeve. The connector, switch box, telephone switchboard, switchboard assembly, relay housing and PC of communication cable under telephone line bracket can all be used as low-load parts, and can be used as handles for household appliances motors, vacuum cleaners, shampoo machines, coffee makers, toasters, power tools, various gears, worm wheels, shaft sleeves, guide rails and shelves in refrigerators. PC is an ideal material for CD storage media. PC bottles (containers) are transparent. Resistant to some high temperature and corrosive solutions, as recyclable bottles (containers), PC and PC alloys can be used as computer racks, housings, auxiliary machines and printer parts. The modified PC is resistant to high-energy radiation sterilization, cooking and baking disinfection, and can be used for blood sample collection instruments, blood oxygenators, surgical instruments, renal dialyzers, etc. PC can be used as helmet and helmet, protective mask, sunglasses and sports goggles. PC film is widely used in printing charts and medical packaging.