9 main characteristics of PEEK materials
peek is a high temperature, high performance thermoplastic special engineering plastic. It has good mechanical properties and chemical resistance, abrasion resistance, hydrolysis resistance and other properties; it has a light weight and good self-lubricating properties. Due to its very good processing properties, it can be filled with carbon fibers, molybdenum disulfide, etc. Mechanical strength. The wide application space of PEEK engineering plastics involves high-tech industries such as aviation, machinery, electronics, chemicals, and automobiles. It can manufacture highly demanding mechanical parts, such as gears, bearings, piston rings, support rings, seal rings (letters), Valve discs, wear rings, etc. The outstanding performance of PEEK materials is mainly reflected in the following aspects:
High temperature resistance
PEEK has a high glass transition temperature and melting point (334 ° C), which is one of the reasons why it can be reliably used in applications requiring heat resistance. Its load thermal deformation temperature is as high as 316 ℃, and the continuous use temperature is 260 ℃.
PEEK is a plastic that has both toughness and rigidity and strikes a balance. In particular, its excellent fatigue resistance to alternating stress is superior to all plastics and can be comparable to alloy materials.
PEEK has outstanding sliding characteristics in all plastics, which is suitable for applications with strict requirements for low friction coefficient and wear resistance. In particular, carbon fiber and graphite each have a certain proportion of mixed modified PEEK with better self-lubricating performance.
Chemical resistance (corrosion resistance)
PEEK has excellent chemical resistance. In ordinary chemicals, only concentrated sulfuric acid can dissolve or destroy it. Its corrosion resistance is similar to that of nickel steel.
PEEK is a very stable polymer. Samples with a thickness of 1.45 mm can reach higher flame retardant standards without any flame retardant.
PEEK has good resistance to peeling, so it can be made into thinly covered electric wires or electromagnetic wires, and can be used under harsh conditions.
PEEK has better fatigue resistance in all resins.
The ability to withstand γ radiation is very strong, which exceeds that of polystyrene, which has better radiation resistance in general resins. It can make high-performance wires that can maintain good insulation ability even when the γ irradiation dose reaches 1100Mrad.
PEEK and its composite materials are not affected by the chemical effects of water and high-pressure water vapor. Products made from this material can still maintain excellent characteristics when continuously used in high-temperature and high-pressure water.