PEI is an amorphous thermoplastic which is a transparent amber colour. It has characteristics similar to PEEK but with lower impact strength and user temperature, and is generally considerably cheaper.

PEI is commonly machined into parts for reusable medical devices, analytical instrumentation, electrical/electronic insulators (including semiconductor process components) and structural components requiring high strength and rigidity at elevated temperatures.

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PEI Technical Properties

PEI Mechanical Properties

PEI Thermal Properties

PEI Electrical Properties

Other PEI Properties

PEI UK Stock Sizes

Standard stock sizes/colours for PEI bar and plate in the UK. Please note we do not supply stock material, the information provided is purely for design and research purposes.