PI

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.

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Physical properties
  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
  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
  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
  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
  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
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

enquire

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)