What is PEEK?

AM-Cup-PEEK-badgeClick to enlarge

PEEK is one of the highest performance thermoplastics, offering the best combination of fatigue resistance and chemical resistance, which is similar to PPS (polyphenylene sulfide). However, PEEK can operate at higher temperatures and retains its excellent mechanical properties at continuous-use temperatures up to 240°C (464°F); these, together with an exceptional chemical resistance, allows it to replace metal in severe end-use environments such as those found in the Oil & Gas, Aerospace and Automotive industries. Glass fiber-reinforced and carbon fiber-reinforced grades provide a wide range of performance options.

Chemical Structure


Key Features

  • Exceptional chemical resistance to organics, acids and bases
  • High mechanical strength in excess of 250°C
  • Very good wear and abrasion resistance
  • Low CLTE and high limiting PV properties
  • Best-in class fatigue resistance
  • Excellent dimension stability
  • Excellent resistance to hydrolysis in boiling water and superheated steam
  • Superior dielectric with low loss at high temperature and frequencies
  • Ease of processing
  • High purity