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Polyetheretherketone (PEEK)
usd/kg
Polyetheretherketone (PEEK) offers high-temperature resistance, wear resistance, corrosion resistance, and self-lubricating properties. It also has superior insulation and chemical resistance compared to metal alloys. With a density about half that of aluminium alloy, PEEK enables lightweight construction while maintaining high strength and rigidity.
PEEK is around 30% crystalline and usually sits alongside materials such as polyoxymethylene (POM), acetal, and Polyamide (PA66), nylon, as higher strength semi-crystalline thermoplastic polymers. PEEK can be used in place of POM or
PA66 where higher strength, stiffness or temperature resistance is required. The strength and stiffness of PEEK are
being used in applications where the resistance required would typically require the properties of metals.
Only four companies worldwide – Victrex (UK), Solvay (Belgium), Evonik (Germany), and China’s Zhongyan Polymer Materials – produce PEEK at large scale. Trade names include Victrex (Victrex), Ketaspire (Syensqo, formerly Solvay), Vestakeep (Evonik), Tecapeek (Ensinger), Ketron (Mitsubishi), Sustapeek (Röchling) and Zeniva (Solvay).
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Sustainability concerns
Non-renewable ingredients
Raw material generates polluting by-products
Low circularity potential
Microplastics
The addition of glass fibre significantly enhances PEEK’s tensile strength, modulus and resistance to deformation, while maintaining its very high resistance to chemicals and thermal stability. It is used in very demanding applications and environments, and is suitable for high loads and elevated temperatures: it excels in structural parts that must withstand continuous or repeated mechanical stress at high temperatures, such as in aerospace, automotive and industrial machinery.
It is suitable for precisions components, produced by injection moulding or CNC machining. Its low coefficient of thermal expansion and excellent dimensional stability make it ideal for parts needing tight tolerances and minimal thermal distortion.
Glass fibre-reinforced PEEK is less suitable for bearing or sliding wear applications due to the abrasive nature of glass fibres on mating surfaces.