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Special engineering plastics classification
Special engineering plastics
Special engineering plastics, also called high-performance engineering plastics, refer to engineering plastics with higher comprehensive performance and long-term use working temperature above 150°C. They have high precision, ultra-high temperature resistance, super corrosion resistance, super fatigue resistance, and super wear resistance. High-temperature transparent, wave-absorbing and wave-transmitting special properties and high-performance engineering plastics are mainly used in high-tech emerging industries such as electronics, machinery, and nuclear power, as well as military and aerospace aviation and other advanced technology industries. Special engineering plastics mainly include: PPS (polyphenylene sulfide), PEEK (polyether ether copper), PI (polyimide), PEI (polyetherimide), PAI (polyamide-imide), PBI (Polybenzimidazole), PPSU (polyphenylene sulfone), PSF (polysulfone), LCP (liquid crystalline polymer), UHMW-PE (ultra high molecular weight polyethylene), PTFE/PVDF (fluoroplastic).
Application of major special engineering plastics
PPS (polyphenylene sulfide)
Electronics: high-voltage components on televisions, housings, sockets, terminals, starting coils, blades for motors, brush holders and rotor insulation components, contact switches, relays, electric irons, hair dryers, lamp holders, blowers, class F film Wait.
Automotive industry: Suitable for exhaust gas recirculation valves and pump impellers, and carburetors, exhaust systems, exhaust regulators, lamp reflectors, bearings, sensing components, etc.
Machinery industry: used as bearings, pumps, valves, pistons, precision gears, as well as copiers, cameras, computer parts, conduits, sprayers, injectors, instrumentation and other parts.
Chemical industry: used to make acid-resistant valve pipes, fittings, valves, gaskets and submersible pumps or impellers and other corrosion-resistant components.
PEEK (polyether ether copper)
Aerospace: PEEK can replace aluminum and other metal materials to manufacture various aircraft components. With its excellent flame retardant properties, PEEK can be used to make internal components of aircraft to reduce the degree of damage in the event of a fire.
Electrical and electronic: PEEK is not deformed over a wide temperature range, and parts made of it can withstand the heat-welded high-temperature environment. In the semiconductor industry, PEEK is commonly used to manufacture wafer carriers, electronic insulation films, and various connection devices. In addition, PEEK is also used for Wafer Carriers insulation films, connectors, printed circuit boards, and high-temperature connectors. In addition, PEEK can also be used for the transportation and storage of μg/L grade ultrapure water, such as pipelines, valves, pumps and accumulators.
Medical: In addition to the high production sterilization requirements of PEEK, repetitive use of surgical and dental equipment and the production of some precision medical instruments, the most important application is that it can replace artificial bone made of metal. The artificial bone produced by PEEK is not only lighter, non-toxic, and highly resistant to corrosion, but also the closest material to the human skeleton in plastic materials and can be organically combined with the body.
In terms of energy and power: PEEK has high temperature resistance, is not easily hydrolyzed, and is also resistant to radiation, so the wire and cable coil bobbin used in it has been successfully used in nuclear power plants.
Oil exploration and mining industry: Probes of special geometries that can be used to make mining machinery.
Machinery industry: PEEK is often used to make compressor valves, piston rings, seals and various chemical pumps and valve components.
Automotive and other industrial sectors: Utilizing PEEK's good friction and mechanical properties, it can be used as a substitute for metal stainless steel and titanium for the manufacture of engine inner covers, automotive bearings, gaskets, seals, clutch rings and other components In addition, it can also be used in the transmission, braking and air conditioning systems of automobiles.
Polyamide Series (PI, PAI, PEI, PBI)
Industrial application of PI:
Widely used in aviation, aerospace, microelectronics, nano, liquid crystal, separation membrane, laser and other fields.
Parts with low coefficient of friction and wear resistance at high speed and high pressure
Excellent resistance to creep or plastic deformation of parts
Excellent self-lubricating or oil-lubricated parts
Liquid seal parts at high temperature and pressure
High bending, tensile and high impact resistance components
Corrosion, radiation and rust resistant parts
Long-term use temperature above 300°C, short-term up to 400~450°C
High-temperature resistant (over 260°C) structural adhesives (modified epoxy resins, modified phenolic resins, modified silicone adhesives and other applications where the temperature does not exceed 260°C)
Microelectronics packaging, stress buffer protective coatings, interlayer insulation of multilayer interconnections, dielectric films, chip surface passivation, etc.
Industrial application of PAI:
Mainly used in IC test equipment / chips, high-speed bearings, power equipment, high temperature gear, mold parts, food machinery, electronic and semi-body industries, space appliances and other demanding areas.
It is commonly used in the manufacture of precision parts for high-tech equipment, as well as for applications where wear resistance is extremely high, such as non-lubricated bearings, seals, bearing isolation rings and reciprocating compressor parts, electronic and semi-conductor industries.
For high temperature, high vacuum, strong radiation, ultra-low temperature conditions of work products. Molded plastics are mainly used for gears, rollers, bearings and copier separation claws.
It has good ablation resistance and high-temperature, high-frequency electromagnetic properties, and can be used as ablation materials, magnetic permeability materials, and structural materials for aircrafts.
It has good adhesion to metals and other materials and is suitable for lacquer wire enamels, impregnated lacquers, films, laminates, coatings and adhesives. For example: The enameled wire made with it has been used in H-class deep-water submersible motors; laminates are used in printed circuit boards and sockets; and films are used as insulating and packing materials.
Can also be used as aircraft parts, reciprocating compressor impeller, bearing isolation ring, jet engine combustion system parts; chipset and socket, cup body welded bearing.
For the production of precision parts, such as electronics and semiconductor industries, oil drilling equipment.
PEI industrial applications:
Polyetherimide (PEI) has excellent overall balance performance, and it has been effectively applied to the electronics, electrical and aerospace industries, and can be used as a metal replacement material for traditional products and cultural life products.
In the electrical and electronics industry, components made of polyetherimide (PEI) materials are used in a wide range of applications, including high strength and dimensionally stable connectors, general and miniature relay enclosures, circuit boards, coils, and flexible circuits. , mirrors, high precision dense fiber optic components. Particularly noteworthy is that using it instead of metal to make fiber optic connectors optimizes the component structure, simplifies the manufacturing and assembly steps, and maintains more precise dimensions, thereby reducing the final product cost by approximately 40%.
Impact resistant sheet Ultem1613 is used for various parts of the aircraft, such as portholes, nose parts, seat backs, inner siding, door coverings, and various items for passengers. Polyetherimide (PEI) and carbon fiber composites have been used in various structural parts of the latest helicopters.
With its excellent mechanical properties, heat resistance and chemical resistance properties, PEI is used in the automotive field, such as sensors used to make high-temperature connections, high-power lights and indicators, and to control the temperature outside the cabin. ) and sensors that control the temperature of the air and fuel mixture (effective combustion temperature sensors). In addition, PEI can also be used as a vacuum pump impeller for high-temperature lubricant corrosion, a ground glass adapter for steam cookers operated at 180°C (bearing interface), and reflectors for non-lighting fog lamps.
Polyetherimide foams used as heat-insulating and sound-insulating materials for transport machinery airplanes.
PEI is excellent in hydrolysis resistance and is therefore used as handles, trays, fixtures, prosthetics, medical lamp reflectors, and dental appliances for medical surgical instruments.
In the food industry, it is used as a tray for product packaging and microwave ovens.
PEI has excellent high-temperature mechanical properties and wear resistance, so it can be used to manufacture valves for water-conversion steering valves. Due to its high strength, flexibility and heat resistance, PEI is an excellent coating and film forming material that can form coatings and films suitable for the electronics industry, and can be used to produce pore sizes <0.1μm with high permeability. Microporous separator. It can also be used as a high-temperature adhesive and high-strength fiber.
PBI industrial applications:
It is often used to make extremely demanding components to reduce maintenance and repair costs and has the longest service life. Applications have been established in the semiconductor and aerospace industries, incandescent or fluorescent high temperature contacts such as vacuum cups, push fingers and cages, and electrical contactors. The disadvantage is that the ability to withstand high temperature steam is insufficient, and the performance is reduced after absorbing moisture.
Polysulfone Series (PSF, PPSU)
PSF industrial applications:
Electrical and electronic fields: PSU can be used to make various contactors, contacts, transformer insulation, thyristor caps, insulation bushings, coil skeletons, terminal posts and electric rings, electrical components, printed circuit boards, bushings, covers, Film and television system parts, capacitor films, brush holders, alkaline storage battery boxes, etc.
Automotive and Aerospace: PSU is suitable for making protective cover components, electric gears, battery covers, detonators, electronic ignition device components, lighting components, internal aircraft components and external parts of aircraft, and outer shields for astronauts. In addition, the PSU can also make luminaire bezels, electric drives, and sensors.
In the kitchen products market: PSU products include steam trays, coffee containers, microwave cookers, milk and produce containers, egg tarts and milker parts, beverages and food dispensers. In terms of food packaging, PSU can be used in a variety of container inner dishes, making use of its microwave-transparent characteristics to make microwave dishes. In addition, the PSU can also be used as a connecting pipe. The outer layer of the pipe has high strength, the inner layer is resistant to chemicals, is lighter and more transparent than the steel pipe, and is easy to monitor. It is often used in the food industry and in the manufacture of lamp shades.
Health and medical fields: PSU is fully in line with hygienic requirements and can withstand repeated sterilization at 130°C. It can be used in sanitary medical devices instead of stainless steel and aluminum to reduce costs. Medical devices that can be made using PSU include: surgical trays, nebulizers, warmers, contact lens holders, flow controllers, instrument covers, dental instruments, pacemakers, and respirator. Medical products made with PSUs are low in cost and are not easily broken, and are therefore used in instrument housings, dental instruments, heart valve boxes, blade cleaning systems, molding boxes for soft contact lenses, microfilters, and dialysis membranes. It can also be used for dentures, which are twice as strong as polyacrylates.
Daily necessities application areas: Daily products made with PSU are mainly heat-resistant and hydrolysis-resistant products, including humidifiers, steam irons, camera boxes, and projector components.
Industrial applications: PSU can manufacture adhesives, coatings, and various chemical processing equipment, including pump housings, protective outer layers, food processing equipment, pollution control equipment, dairy processing equipment and engineering, construction, and chemical pipelines.
PPSU Industrial Applications:
Mainly used in electrical and electronic, food appliances, dairy processing equipment and some daily necessities, automotive, aviation, medical and general industrial sectors, making various contactors, connectors, transformer insulation, thyristor caps, insulation sleeves, coils Skeleton, terminal, printed circuit board, bushing, cover, TV system components, capacitor film, brush holder, alkaline battery box, wire and cable coating. Sulfone resin can also be used as protective cover components, electric gears, battery covers, internal and external parts of aircraft, outer shields for astronauts, photo plates, lighting components, and sensors. Instead of glass and stainless steel steam trays, coffee containers, microwave cookers, milk containers, milker parts, beverages and food dispensers. Hygiene and medical devices include surgical trays, nebulizers, humidifiers, dental instruments, flow controllers, and laboratory instruments. They are used to insert high-strength adhesives for dental implants. Layers, acid nozzles, pipes, valve containers, etc.
LCP (Liquid Crystal Polymer)
Electrical and electronic products: Surface mount electronic components, especially those with complex structures, thin-walled, small-sized parts, circuit boards, boxes, sleeves, covers, brackets, and supports for various purposes;
High-temperature components: for example, instead of ceramics, used as high-temperature lamp holders, light-emitting diodes, etc.;
High-strength parts: instead of metal materials, used in applications requiring high strength;
Widely used in electronic industry, communications industry, automotive industry, aerospace, optical cable, chemical industry, audio equipment and other fields.
Transport machinery: conveyor block, fixed plate, running water production line time star wheel.
Food Machinery: Star Wheels, Counting Screws for Bottle Feeding, Bearings for Filling Machines, Bearings for Bottle Cutters, Parts for Bottle Cutters, Peg Control Lever, Parts for Meat Grinder, Washers, Guide Pins, Guide Rails, Cylinders, Gears, Roller, handle.
Papermaking machinery: suction box cover, sealed toggle lever, deflector wheel, scraper, bearing, cock, nozzle, filter, oil reservoir, wear strip, felt sweeper.
Textile machinery: leather knots, openers, shock absorber baffles, connectors, cranks, crankshaft connecting rods, gears, cams, bearings, parts of elastic machines, shuttles, flower sweepers, bias bearings, oscillating Rear beam.
Chemical machinery: valve body, pump body, gasket, packing, filter, gear, bolt, nut, sealing ring, nozzle, cock, bearing.
General machinery: all kinds of gears, bearings, bearings, bushings, sliding plates, clutches, guides, brakes, hinges, cranks, elastic coupling details, rollers, rollers, fasteners, sliding parts after lifting.
Dye modification: Dipping machine bearings, scrapers, sliding plates, gaskets, seals, gears.
Sports and sports goods: ski lining, power skis, skating rinks, ice hockey protection, gliders contact floors, bowling.
Medical and health: heart valves, orthopaedic parts, artificial joints, birth control implants, prostheses.
Others: Shelter plates for cryogenic machinery, nuclear power stations, ship parts, butcher boards, boring heads, electroplated parts, cryogenic mechanical parts.