- Materials
- Ultem

Ultem
Ultem (polyetherimide) is a semi-transparent, high-strength plastic that performs exceptionally well in high-service temperature environments. Boasting one of the highest dielectric strengths of any thermoplastic material, Ultem is uniquely well-suited for electrical applications.
Please note
The information contained herein are typical values intended for reference and comparison purposes only. They should NOT be used as a basis for design specifications or quality control.
Design Tip
To save money on HDPE components, minimize the number of part setups, inspection dimensions, or strict tolerances, and avoid deep pockets with small radii.
Ultem
Polyetherimide, commonly known as Ultem, is a durable plastic engineered for exceptional electrical performance and reliable operation at high temperatures.
Given its mechanical, electrical, and thermal properties, Ultem is ideal for medical instrument components, scientific equipment parts, electrical connectors, and semiconductor components.
Performance Characteristics
- High dielectric strength
- Easy to machine and fabricate
- Extremely strong and stiff
- Resistant to hydrolysis when exposed to hot water and steam
Common Brands
- Ultem
- SUSTAPEI
- TECAPEI
HDPE Properties
- Mechanical Properties
- Thermal Properties
- Electrical Properties
- Optical Properties
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Mechanical Properties
Tensile Strength 15,000 psi Tensile Modulus of Elasticity 430,000 psi Tensile Elongation 60% Flexural Strength 22,000 psi Flexural Modulus of Elasticity 480,000 psi Compressive Strength 21,900 psi Hardness Shore D 86 Izod Impact 1.0 -
Thermal Properties
Coefficient of Linear Thermal Expansion 3.1 in/in/°F x 10-5 Heat Deflection Temperature (66 psi/264 psi) 410 / 392 °F Max Continuous Service Temperature in Air 338 °F -
Electrical Properties
Dielectric Strength 830 V/mil -
Optical Properties
Light Transmittance -- % Haze -- %