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Ensinger PEI

Unitika UM-8400-20
Categories: Polymer; Thermoplastic; Polyarylate

Material Notes: Characteristics:
  • High dimensional accuracy (circularity and planarity)
  • Large warping resistance
  • Low linear expansion coefficient

Information provided by Unitika Ltd.

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 1.43 g/cc0.0517 lb/in³ASTM D792
Water Absorption 0.13 %
@Thickness 3.17 mm,
Time 86400 sec
0.13 %
@Thickness 0.125 in,
Time 24.0 hour
ASTM D570
Linear Mold Shrinkage, Flow 0.0025 cm/cm
@Thickness 3.00 mm
0.0025 in/in
@Thickness 0.118 in
 
Mechanical PropertiesMetricEnglishComments
Hardness, Rockwell R 116116ASTM D785
Tensile Strength at Break 73.0 MPa10600 psiASTM D638
Elongation at Break 6.5 %6.5 %ASTM D638
Flexural Strength 120 MPa17400 psiASTM D790
Flexural Modulus 4.70 GPa682 ksiASTM D790
Izod Impact, Notched 0.440 J/cm
@Thickness 3.17 mm
0.824 ft-lb/in
@Thickness 0.125 in
ASTM D256
 
Electrical PropertiesMetricEnglishComments
Volume Resistivity 1.00e+14 ohm-cm1.00e+14 ohm-cmASTM D257
Dielectric Strength >= 21.0 kV/mm>= 533 kV/inASTM D149
 
Thermal PropertiesMetricEnglishComments
CTE, linear 28.0 µm/m-°C15.6 µin/in-°FASTM D696
Deflection Temperature at 1.8 MPa (264 psi) 98.0 °C208 °FASTM D648
 
Processing PropertiesMetricEnglishComments
Rear Barrel Temperature 230 - 250 °C446 - 482 °F
Middle Barrel Temperature 240 - 260 °C464 - 500 °F
Front Barrel Temperature 250 - 270 °C482 - 518 °F
Nozzle Temperature 250 - 270 °C482 - 518 °F
Mold Temperature 70.0 - 90.0 °C158 - 194 °Factual surface temp
Drying Temperature 100 °C212 °F
Dry Time 10.0 - 24.0 hour10.0 - 24.0 hour
Back Pressure 0.490 - 1.47 MPa71.1 - 213 psigage pressure

Some of the values displayed above may have been converted from their original units and/or rounded in order to display the information in a consistent format. Users requiring more precise data for scientific or engineering calculations can click on the property value to see the original value as well as raw conversions to equivalent units. We advise that you only use the original value or one of its raw conversions in your calculations to minimize rounding error. We also ask that you refer to MatWeb's terms of use regarding this information. Click here to view all the property values for this datasheet as they were originally entered into MatWeb.

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