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General engineering plastics
General engineering plastics
Engineering plastics refers to industrial plastics that are used as industrial parts or housing materials. They are plastics that are excellent in strength, impact resistance, heat resistance, hardness, and aging resistance. Engineering plastics are used as structural materials to withstand mechanical stress over a wide temperature range. High-performance polymer materials used in more severe chemical and physical environments are generally able to withstand certain external forces and have good mechanical properties and dimensions. Stability, can maintain its excellent performance at high and low temperatures, can be used as engineering structure of the plastic.
General-purpose plastics The modified engineering plastics and products have tensile strength over 50 MPa, tensile strength above 500 kg/cm, impact resistance over 50 J/m, bending elasticity at 24000 kg/cm, deflection temperature under load exceeding 100 °C, excellent hardness and aging. Mainly include: polypropylene (PP), acrylonitrile-butadiene-styrene copolymer (ABS), nylon (Nylon), polyoxymethylene (POM), polybutylene terephthalate/ethylene glycol (PBT/PET ), Polycarbonate (PC), Polyphenylene oxide (PPO/PPE), Alloy plastic, Thermoplastic elastomer (TPE), Degradable material (PSM), Unsaturated polyester (UP), etc.
Application of major common engineering plastics
(PA) has attracted people's attention due to its unique low specific gravity, high tensile strength, wear resistance, good self-lubrication, excellent impact toughness, and rigidity and flexibility, combined with its easy processing, high efficiency, and light weight ( Only 1/7 of the metal) can be processed into various products instead of metals, and is widely used in automobiles and transportation. Typical products include pump impellers, fan blades, valve seats, bushings, bearings, various instrument panels, automotive electrical instrumentation, and hot and cold air-conditioning valves and other parts. About each car consumes nylon products.
3.6 to 4 kg. Polyamide has the largest proportion of consumption in the automotive industry, followed by electronics and electronics.
(PC) not only has the strength similar to non-ferrous metals, but also has both ductility and toughness. Its impact strength is extremely high. It can't be damaged by percussion with a hammer, and can withstand the explosion of a TV screen. Polycarbonates are excellent in transparency and can be colored. Due to the above-mentioned excellent properties of polycarbonate, it has been widely used in various safety lamp shades, signal lamps, transparent protective plates for stadiums, stadiums, lighting glass, high-rise building glass, automotive mirrors, windshield plates, aircraft cockpit glass, motorcycles Car driving safety helmet
. The most used markets are computers, office equipment, automobiles, alternative glass and sheets, and CDs and DVDs are among the most promising markets.
(POM) is known as "ultra-steel" because of its superior mechanical properties and chemical properties, so it can be used as a material that many metal and non-metal materials cannot be used for, and is mainly used for various kinds of high precision. Small modulus gears, sophisticated gauges with geometric surfaces, taps and valves for explosion gas pipelines. China's use of polyoxymethylene for agricultural irrigation machinery, can save a lot of copper.
(PBT) is a thermoplastic polyester. Non-reinforced PBT has better processability and electrical properties than other thermoplastic engineering plastics. The glass transition temperature of PBT is low, and the mold temperature can be rapidly crystallized at 50°C. The processing cycle is short. Polybutylene terephthalate (PBT) is widely used in the electronics, electrical and automotive industries. Because PBT's high insulation and temperature resistance can be used as TV's flyback transformers, automotive distribution board and ignition coils, office equipment housings and bases, various automotive exterior parts, air conditioner fans, electronic stove bases, and office Equipment shell.
(PPO) resin has excellent physical and mechanical properties, heat resistance and electrical insulation, and low moisture absorption, high strength, good dimensional stability, creep resistance at high temperatures is the most excellent of all thermoplastic engineering plastics. The utility model can be applied to small household appliances such as a compressor cover, a vacuum cleaner case, a coffee appliance, a hair styling device, a massage device, a microwave oven and the like. The modified polyphenylene ether is also used in television parts, connectors for teletype end-point devices, and the like.