When strength, heat resistance, and dimensional stability are critical, Ultem® plastic rises to the occasion. Known for its unique combination of properties, Ultem is a high-performance thermoplastic used in the most demanding industries, including aerospace, medical, electronics, and industrial manufacturing.
Ultem® is the brand name for polyetherimide (PEI), an amorphous thermoplastic developed by SABIC. It features outstanding mechanical strength, high temperature performance, excellent flame resistance, and good chemical resistance, all without fillers or additives.
Aerospace: Ducting, clips, panels, and other weight-critical components.
Medical: Reusable surgical instruments, sterilization trays, handles.
Electronics: High-voltage insulators, connectors, circuit board components.
Industrial: Manifolds, impellers, high-temp fittings.
Food Processing: FDA-compliant versions for hot-fill or autoclaved food contact.
Property |
Ultem (PEI) |
PEEK |
Polycarbonate |
Heat Resistance |
Excellent |
Superior |
Moderate |
Mechanical Strength |
Very High |
Very High |
Moderate |
Chemical Resistance |
Good |
Excellent |
Moderate |
Cost |
$$$ |
$$$$ |
$$ |
Machinability |
Good |
Moderate |
Excellent |
Ultem is available in sheet, rod, and tube. It machines well with standard tooling and offers exceptional stability for tight-tolerance components. Commonly CNC-machined or thermoformed.
Let us help you select the right Ultem grade and format for your project. Contact us today for expert guidance, material availability, and precision fabrication support.
Contact us today for your fabrication and machining needs!
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Polyetherimide
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