HPMs – High-performance materials
PI
Polyimide is a sintered material with excellent heat resistance and dimensional accuracy. Does not soften in any conditions. It retains its mechanical strength, creep resistance and precision across a very wide range of temperatures in long-term use. We deliver PI as plastic sheets, rods and short hollow rods.
- Physical properties
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Value Unit Test method Specific gravity 1.34 g/cm3 DIN EN ISO 1183 Average molecular mass N/A Water absorption, 24/96 h (23 °C) 1.08 % DIN EN ISO 62 Weather-resistance – 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 3600 MPa DIN EN ISO 527-2 Tensile strength 116 MPa DIN EN ISO 527-2 Elongation at break N/A Tensile strength at break 3.8 % DIN EN ISO 527-2 Flexural modulus 3700 MPa DIN EN ISO 178 Flexural strength 170 MPa DIN EN ISO 178 Compressive modulus 2000 MPa EN ISO 604 Compressive strength, 1%/2% N/A Impact strength (Charpy) 75.8 kJ/m2 DIN EN ISO 179-1eU Notch impact strength (Charpy) 5 kJ/m2 DIN EN ISO 179-1eA Notch impact strength (Izod) – kJ/m2 DIN EN ISO 180/2A Toughness (ball pressure) N/A Toughness (Shore D) 90 Sh D DIN EN ISO 868 Wear-resistance N/A Coefficient of friction (against steel) N/A - Thermal properties
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Value Unit Test method Glass-transition temperature 368 °C DIN 53765 Melting point N/A Operating temperature (instantaneous) 350 °C Operating temperature (continuous) 300 °C Operating temperature (minimum) -270 °C Thermal expansion coefficient, 23–60 °C N/A Thermal expansion coefficient, 23–100 °C 4.3 10-5 K-1 DIN EN ISO 11359-1;2 Specific heat capacity 1.04 J/(g×K) ISO 22007-4:2008 Thermal conductivity 0.22 W/(m×K) ISO 22007-4:2008 - Electrical properties
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Value Unit Test method Surface resistivity 1016 Ω DIN IEC 60093 Resistivity 1017 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, short hollow bars |
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Specific gravity | 1.34 g/cm3 |
Service temperature | -270 … 300 °C |
Price category | €€€+ (>€50/kg) |
Special properties
- mechanical strength over a wide temperature range
- long-term heat-resistance
- extremely low thermal expansion
- good creep-resistance
- broad service temperature range
- good wear- and sliding-related properties in the unmixed materials too
- high purity and very low gasification in vacuum conditions (ESA ECSS-Q-70-02)
- mechanical strength also at extremely low temperatures
Applications
glass industry, electronics industry, aviation industry, precision engineering
Standard colours
brown
Premade pieces
Commonly known brands
Duratron® T4203, TECATOR® 5013
Further information
Note: The material is available in a variety of mixed compositions (including with added PTFE, MoS2, graphite and glass fibre)