PEEK, also known as, Victrex ®, Ketron ®, Tecapeek ®, is a semicrystalline thermoplastic with excellent mechanical and chemical (& hydrolysis) resistance properties that are retained to high temperatures. It has a glass transition temperature of around 143 °C and melts around 343 °C . PEEK brings high mechanical strength, stiffness and creep resistance over this wide temperature range. Virgin PEEK is known for its excellent wear and friction behaviour and comes with good dimensional stability.

Many different compounds are on the market; PEEK GF30 (glass fiber filled), PEEK BG (bearing grade), PEEK HT (high temperature grade), PEEK CA (carbon filled), PEEK CF (carbon fiber filled), …

This material is used to fabricate items used in demanding applications, including bearings, piston parts, pumps, HPLC columns, compressor plate valves, and electrical cable insulation. It is one of the few plastics compatible with ultra-high vacuum applications. PEEK is considered an advanced biomaterial used in medical implants.

It is extensively used in the aerospace, automotive, and chemical process industries. PEEK seals and manifolds are commonly used in fluid applications. PEEK also performs well in applications where continuous high temperatures (up to 260 °C) are common.

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