Short answer
PEEK (polyether ether ketone) is a high-performance engineering plastic that performs close to metal under high temperature and load. It works from −60 to +250 °C, resists chemicals and has high dimensional stability. It is used in aerospace, semiconductor, medical and high-temperature machine parts.
Why PEEK?
- Keeps its strength at continuous high temperature.
- High resistance to chemicals and steam.
- Good dimensional stability and creep resistance.
- At 1.31 g/cm³, much lighter than metals.
Compared with cast nylon
Cast nylon runs continuously up to +100 °C, PEEK up to +250 °C. PEEK, however, costs far more than cast nylon, so it should be chosen only where temperature or chemical conditions really demand it. For the temperature limits of cast nylon see technical data.
Supply
We supply PEEK as rod, sheet or CNC-machined parts to drawing: engineering plastics. Share your application and we will choose between PEEK, PTFE and cast nylon together: get advice. For the difference from PTFE see the PTFE article.
Frequently asked questions
Why is PEEK expensive?
Its raw material and production are costly. The price pays off under extreme conditions where metals or other plastics fall short.
Is PEEK used in food and medical applications?
Suitable PEEK grades exist for these fields; a certificate of conformity should be requested for each application.
