
HPMs – High-performance materials
PEI
Polyetherimide is an amorphous thermoplastic that belongs to the polyimide family. It has good dimensional accuracy across a wide temperature range. This heat-resistant material also exhibits low thermal expansion. It is naturally flame‑retardant and has a fire rating of UL94 V-0. We deliver PEI as plastic sheets and plastic rods.
- Physical properties
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Value Unit Test method Specific gravity 1.28 g/cm3 DIN EN ISO 1183 Average molecular mass N/A Water absorption, 24/96 h (23 °C) 0.05/0.1 % DIN EN ISO 62 Weather-resistance poor Combustibility V0 UL 94 DIN EN ISO 527-2 Food safety no - Mechanical properties
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Value Unit Test method Modulus of elasticity 3200 MPa DIN EN ISO 527-2 Tensile strength 127 MPa DIN EN ISO 527-2 Elongation at break 7 % DIN EN ISO 527-2 Tensile strength at break 35 % DIN EN ISO 527-2 Flexural modulus 3300 MPa DIN EN ISO 178 Flexural strength 164 MPa DIN EN ISO 178 Compressive modulus 2800 MPa EN ISO 604 Compressive strength, 1%/2% 23/41 MPa EN ISO 604 Impact strength (Charpy) 113 kJ/m2 DIN EN ISO 179-1eU Notch impact strength (Charpy) N/A Notch impact strength (Izod) – kJ/m2 DIN EN ISO 180/2A Toughness (ball pressure) 225 MPa ISO 2039-1 Toughness (Shore D) N/A Wear-resistance N/A Coefficient of friction (against steel) N/A - Thermal properties
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Value Unit Test method Glass-transition temperature 216 °C DIN 53765 Melting point N/A Operating temperature (instantaneous) +200 °C Operating temperature (continuous) 170 °C Operating temperature (minimum) N/A Thermal expansion coefficient, 23–60 °C 5 10-5 K-1 DIN EN ISO 11359-1;2 Thermal expansion coefficient, 23–100 °C 5 10-5 K-1 DIN EN ISO 11359-1;2 Specific heat capacity 1.2 J/(g×K) ISO 22007-4:2008 Thermal conductivity 0.21 W/(m×K) ISO 22007-4:2008 - Electrical properties
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Value Unit Test method Surface resistivity 1014 Ω DIN IEC 60093 Resistivity 1014 Ω×cm DIN IEC 60093 Dielectric strength N/A CTI value N/A - Optical properties
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Value Unit Test method Light transmittance N/A Refractive index N/A Optical errors N/A Abrasion-resistance, 100 rotations with 500 g N/A
Additional downloads
Delivery selection | plastic sheets, plastic rods |
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Specific gravity | 1.28 g/cm3 |
Service temperature | N/A … 170 °C |
Price category | €€€+ (>€50/kg) |
Special properties
- dimensional accuracy across a wide temperature range
- low thermal expansion
- good heat-resistance
- good resistance to radiation
- food-grade product
Applications
electronics industry, precision engineering, pharmaceutical industry, food and drinks industry
Standard colours
amber
Premade pieces
Commonly known brands
Duratron® PEI, SUSTAPEI®, TECAPEI®, ULTEM®1000, ZELLAMID® 1000