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Ensinger PEI

Omnia Plastica PEI Polyetherimide
Categories: Polymer; Thermoplastic; Polyetherimide (PEI)

Material Notes: This high performance engineering plastic is a non-reinforced self-extinguishing amorphous polymer with high thermal, electrical and mechanical properties which are typical of a crystalline polymer.

Features:

  • Resistance to high temperature
  • Flame resistance: self-extinguishing, low oxygen index.
  • Mechanical properties: high tensile stress, flexural strength, E.modulus
  • Chemical resistance
  • Electrical properties
Weak Point:

The cost is higher than conventional engineering plastics. The shock resistance is not high.

Application:

  • Electrical: very good insulating and dielectric properties. It is irreplaceable in many applications in this field thanks to its self-extinguishing property and low smoke emission.
  • Mechanical: it is used for high performance components such as bearings, precision gears, etc. at low as well as high temperatures. The dimensional stability is excellent, as is the heat resistance.
  • Chemical: good chemical and thermal properties.
  • Food contact: physiologically inert

Information provided by Omnia Plastica s.p.a. for semifinished products such as sheet, rod, and tube.

Vendors: No vendors are listed for this material. Please click here if you are a supplier and would like information on how to add your listing to this material.
 
Physical PropertiesMetricEnglishComments
Density 1.27 g/cc0.0459 lb/in³ISO.1183 DIN.53479
Moisture Absorption at Equilibrium 0.20 %0.20 %50% relative humidity
Water Absorption at Saturation 1.2 %1.2 %23°C
 
Mechanical PropertiesMetricEnglishComments
Hardness, Rockwell M 109109dry sample; ISO2039.2
Ball Indentation Hardness 170 MPa24700 psiISO2039.1 DIN.53456
Tensile Strength at Break 95.0 MPa13800 psiISO.527 DIN.53455
Elongation at Break 50 %50 %ISO.527 DIN.53455
Tensile Modulus 3.10 GPa450 ksiISO.527 DIN.53455
Compressive Strength 20.0 MPa2900 psi1% strain over 1000 hours; ISO.899 DIN.53444
Charpy Impact Unnotched NBNB7.5 J; ISO.R179 DIN.53453
Charpy Impact, Notched 8.00 J/cm²38.1 ft-lb/in²ISO179/3C DIN.53453
Coefficient of Friction, Dynamic 0.420.42on dry ground steel; load =0.05MPa; speed =0.6 m/s
 
Electrical PropertiesMetricEnglishComments
Volume Resistivity 5.90e+12 ohm-cm5.90e+12 ohm-cmISO.93 DIN.53482
Dielectric Constant 3.2
@Frequency 1e+6 Hz
3.2
@Frequency 1e+6 Hz
ISO.250 DIN.53483
Dielectric Strength 33.0 kV/mm838 kV/inISO.243 DIN.53481
Dissipation Factor 0.0020
@Frequency 1e+6 Hz
0.0020
@Frequency 1e+6 Hz
ISO.250 DIN.53483
 
Thermal PropertiesMetricEnglishComments
CTE, linear 50.0 µm/m-°C
@Temperature 23.0 - 60.0 °C
27.8 µin/in-°F
@Temperature 73.4 - 140 °F
Thermal Conductivity 0.220 W/m-K1.53 BTU-in/hr-ft²-°FDIN.52612
Maximum Service Temperature, Air 180 °C356 °FContinuous; 5000 hours based on a tensile stress of 50% at 23° C.
 200 °C392 °Fshort period, no load
Deflection Temperature at 1.8 MPa (264 psi) 195 °C383 °FISO.75 DIN.53461
Minimum Service Temperature, Air -30.0 °C-22.0 °Fimpact conditions and heavy loads not considered
Flammability, UL94 V-0V-0
Oxygen Index 47 %47 %ISO.4589
 
Descriptive Properties
FormAmorphous

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