polyether imide (PEI)

We use this material in the following process(es):

Extruded profiles and semifinished products

Machined parts.
Lathed and milled parts in single and serial production

Injection moulding.
Injection moulded parts up to 16.000 g

Thermoplastic structure foaming (TSF).
Multi functional parts and housings up to 16 kg

Material number   2501  
Density ISO 1183 1,27 g/cm3

Mechanical properties

Stress at yield ISO 527 105 MPa
Tensile strength ISO 527 85 MPa
Elongation at break ISO 527 60 %
Tensile modulus ISO 527 3200 MPa
Ball pressure hardness ISO 2039-1 140 MPa
Standard for ball pressure hardness   H358/30  
Hardness Shore (A/D) or Rockwell (R/L/M) ISO 868, ISO 2039-2 M109 -
Izod notched impact strength at 23 °C ISO 180/1A 6 KJ/m2
Charpy notched impact strength at 23 °C ISO 179/1eA 4 KJ/m2

Electrical properties

Dielectric constant at 50 Hz IEC 60250 2,9 -
Dielectric constant at 1 MHz IEC 60250 2,9 -
Dissipation factor at 50 Hz IEC 60250 5 1E-4
Dissipation factor at 1 MHz IEC 60250 60 1E-4
Dielectric strength IEC 60243-1 33 kV/mm
Thickness for electric strength   0,8 mm
Volume resistivity IEC 60093 1,00E+15 Ohm · m
Surface resistivity IEC 60093 1,00E+15 Ohm
Comparative tracking index IEC 60112 150 -

Thermal properties

Thermal conductance DIN 52 612 0,24 W/K m
Linear thermal expansion along|cross to direction of flow ISO 11359 50 10-6/K
Melting point or glass transition temp. ISO 11357 217 °C
Heat distortion temperature A ISO 75 HDT/A (1.8 MPa) 190 °C
Heat distortion temperature B ISO 75 HDT/B (0,45 MPa) 200 °C
Short time use temperature   200 °C
Continuous use temperature   170 5) °C
Minimal use temperature   -100 °C

Other properties

Humidity absorption at 23°C/50% ISO 62 0,7 %
Water absorption ISO 62 1,25 %
Flammability UL 94 IEC 60695-11-10 V-0/5VA -
Thickness for UL 94   0,41/1,9 mm
Transparency (opaque/translucent/clear)   clear  
Raw material   Ultem 1000 (Sabic)  

5) : Thermal ageing UL 746 (RTI) Mechanical W/O Imp., 40 000 h

This datasheet is a print-out of the material database RIWETA 4.0 and is intended for personal use only.

The figures in this datasheet are guide values. The values are affected by processing conditions, modifications, additives and environmental conditions and they do not release you from the obligation to check the validity and to undertake tests on your own. The information given is based on our state of knowledge. The material data is not to be construed as guaranteeing specific properties and the data can not be used to deduce the suitability for a particular application.

It remains the responsibility of the user of our products not to infringe patent rights and to comply with existing laws and regulations.

LPM s.r.o.
Technické díly z plastů
Koněvova 536
CZ-506 11 Jičín

© 2008 by LPM s.r.o., Technické díly z plastů
Koněvova 536, CZ-506 11 Jičín, Česka republika, info@lpm.cz