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Polyether ether ketone, often abbreviated as PEEK, is a high-performance thermoplastic polymer. It belongs to the polyaryletherketone (PAEK) family of plastics. PEEK is known for its exceptional mechanical properties, thermal stability, and chemical resistance. These characteristics make it suitable for demanding applications across various industries.

The polymer's structure consists of repeating ether and ketone functional groups linked by aromatic rings. This arrangement contributes to its inherent strength, rigidity, and resistance to a wide range of chemicals, including acids, bases, and organic solvents. PEEK also exhibits a high glass transition temperature and melting point, allowing it to retain its mechanical integrity at elevated temperatures. Furthermore, it possesses excellent wear resistance and low flammability.

Industries that utilize PEEK include aerospace, automotive, medical, and electronics. In aerospace, its lightweight and high strength contribute to fuel efficiency. The automotive sector uses PEEK for components requiring resistance to heat and wear. In the medical field, its biocompatibility and sterilizability make it suitable for implants and surgical instruments. The electronics industry benefits from its electrical insulation properties and thermal stability. PEEK can be processed using conventional thermoplastic methods such as injection molding, extrusion, and compression molding.