One article to understand special engineering plastic PEEK
Polyetheretherketone (PEEK resin for short) is a high-temperature thermoplastic, with a high glass transition temperature (143°C) and melting point (334°C), and its thermal deformation temperature under load is as high as 316°C (30% glass fiber). Or carbon fiber reinforced), which can be used for a long time at 250°C. Compared with other high-temperature resistant plastics such as pi, pps, ptfe, ppo, etc., the upper limit of the use temperature exceeds about 50°C.
PEEK resin not only has better heat resistance than other high temperature resistant plastics, but also has high strength, high modulus, high fracture toughness and good dimensional stability;
PEEK resin can maintain high strength at high temperatures. Its flexural strength at 200°C is around 24mpa, and at 250°C, the flexural strength and contraction strength are still 12~13mpa;
PEEK resin has higher rigidity, better dimensional stability, and lower linear expansion coefficient, which is very close to metal aluminum materials;
It has excellent chemical resistance. Among the chemicals, only concentrated sulfuric acid can melt or crush it. Its corrosion resistance is close to that of nickel steel. At the same time, it has flame retardancy and releases less smoke and toxic gas under the premise of flame. Strong radiation resistance;
PEEK resin has good toughness and good resistance to alternating stress, which is the most outstanding among all plastics, which is comparable to alloy materials;
PEEK resin has outstanding tribological characteristics, excellent sliding wear resistance and fretting wear performance, especially can maintain high wear resistance and low friction coefficient at 250 ℃;
PEEK resin is easy to extrude and injection molding, has excellent processing performance and high molding efficiency.
PEEK also has excellent functions such as good self-lubrication, easy processing, constant insulation, and hydrolysis resistance.
In order to meet the requirements of manufacturing high-precision, heat-resistant, abrasion-resistant, decadent and impact-resistant parts, PEEK resin is blended, filled, fiber composited and other reinforced modification measures can be used to obtain excellent PEEK alloy or PEEK with double performance. Composite materials.
The blending of PEEK and polyetherketone can obtain a composite material with a specific melting point and a specific glass transition temperature, and the processing and molding function of the material can be improved;
The composite material blended with PEEK and polyethersulfone not only has outstanding mechanical performance, but also improves the flame-retardant performance;
The material made of special phenolic resin in PEEK has a special anti-friction function;
The composite material made by blending PEEK and PTFE, while maintaining the high strength and hardness of PEEK, also has convex wear resistance, and can be used to manufacture sliding bearings, seal rings and other mechanical parts;
PEEK can be modified and reinforced with carbon fiber and glass fiber and other fibers to make a high-performance composite material. The fiber-reinforced PEEK composite material has excellent creep resistance, damp and heat resistance, aging resistance and impact resistance.
Adding carbon fiber or glass fiber to PEEK can also greatly improve the tensile and bending strength of the material;
The use of whisker materials in PEEK can improve the hardness, rigidity and dimensional invariance of the material, and is used to manufacture the ring and mesh valve plates of the hydrogen compressor and the petroleum gas compressor on the large-scale petrochemical production line.
The PEEK composite material reinforced and modified with inorganic nanomaterials is a new type of composite material that integrates many characteristics of organic resin and high-performance inorganic nanoparticles. It can significantly improve the impact and friction resistance of PEEK resin, and at the same time improve the performance of PEEK. Rigidity and dimensional invariance further broaden the use range of PEEK resin.
In terms of electronics and electrical appliances, PEEK resin has good electrical performance and is a good electrical insulator. It can still maintain excellent electrical insulation under harsh working environments such as high temperature, high pressure and high humidity. Therefore, the field of electronics and electrical appliances has gradually become the second largest application area of PEEK resin.
In the semiconductor industry, PEEK resin is often used to manufacture wafer carriers, electronic insulating films, and various connecting devices. It can also be used for wafer carriers, insulating films, connectors, printed circuit boards, high-temperature connectors, etc.
In addition, PEEK resin can also be used in ultra-pure water transportation and storage equipment, such as pipes, valves, pumps, and volumetric devices. At the moment, the production of integrated circuits in Japan and other countries is also using PEEK resin materials.
In terms of medical treatment, PEEK resin is used in surgical and dental equipment that require several times of sterilization and is used to construct some compact medical instruments. The most important use is to replace artificial bones made of metal. In addition to the advantages of light weight, non-toxicity, and strong corrosion resistance, artificial bone constructed with PEEK resin is also the closest material to human bones in plastics, and can be organically connected to the body. Therefore, PEEK resin is used instead of metal to make human bones. It is a very important use in the medical field, and it has far-reaching significance and value.
In the mechanical industry, PEEK resin is often used to build valve discs, piston rings, seals, and various chemical pump bodies and valve parts. Use this resin instead of stainless steel to construct the impeller of the vortex pump. In addition, PEEK resin is suitable for the specifications of the pipe group workpiece material, and it can still be bonded with various adhesives at high temperatures, so modern connectors will be another of them. Latent use of the market.
PEEK polymer material is extremely strong, chemically inert and flame-retardant, and can be easily processed into parts with very small tolerances. PEEK has the advantages of light specific gravity, corrosion resistance, and temperature resistance, which can successfully replace metals, traditional composite materials, and Other plastics.
PEEK polymer material has been officially approved by many aircraft manufacturers, and it also meets the requirements of supplying military standard products. PEEK resin can be used to manufacture various aircraft parts and components --- the application in the aerospace field can be rapidly expanded.
In aerospace, PEEK resin can replace aluminum and other metal materials to manufacture various aircraft parts, manipulate its excellent flame-retardant function, and can be used to manufacture aircraft internal components to reduce the risk of fire when landing aircraft.
In terms of fuel source power, PEEK resin has high temperature resistance, is not easy to be hydrolyzed, and is resistant to radiation, so the wire and cable coil skeletons built with it have been successfully used in nuclear power plants.
In the petroleum prospecting and mining industry, it can be used to manufacture probes with special geometric dimensions that are touched by mining machinery.
In terms of coating, the powder coating of PEEK resin is covered on the metal to obtain a metal with good insulation, strong corrosion resistance, heat resistance and water resistance. PEEK powder coating finished products are widely used in chemical anti-corrosion, household appliances, electronics, machinery and other fields. In addition, PEEK resin can also be used to make packed columns for liquid chromatography analyzers and ultra-fine tubes for connection.
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