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Ensinger PEI

Polikim EFALON® K-25 PTFE, 25% Carbon Filled
Categories: Polymer; Thermoplastic; Fluoropolymer; Polytetrafluoroethylene (PTFE); Polytetrafluoroethylene (PTFE), Carbon Fiber Filled
Material Notes: K25 and K35 have less thermal expansion, higher wear resistance, less deformation under load properties compared to virgin Efalon® (PTFE). Applications: Bearings, piston rings, gaskets, seal rings.

Information provided by Polikim Polimer.
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 2.05 - 2.15 g/cc0.0741 - 0.0777 lb/in³ASTM D792
Deformation  0.40 - 2.1 %
@Temperature 23.0 °C,
Time 86400 sec,
Pressure 13.7 MPa		0.40 - 2.1 %
@Temperature 73.4 °F,
Time 24.0 hour,
Pressure 1990 psi		permanent; ASTM D621
 1.8 - 2.0 %
@Temperature 150 °C,
Time 86400 sec,
Pressure 0.981 MPa		1.8 - 2.0 %
@Temperature 302 °F,
Time 24.0 hour,
Pressure 142 psi		total
 2.9 - 4.8 %
@Temperature 23.0 °C,
Time 86400 sec,
Pressure 13.7 MPa		2.9 - 4.8 %
@Temperature 73.4 °F,
Time 24.0 hour,
Pressure 1990 psi		total; ASTM D621
 8.0 - 9.0 %
@Temperature 150 °C,
Time 86400 sec,
Pressure 4.90 MPa		8.0 - 9.0 %
@Temperature 302 °F,
Time 24.0 hour,
Pressure 711 psi		total
 
Mechanical PropertiesMetricEnglishComments
Hardness, Shore D 65 - 6865 - 68ASTM D2240
Tensile Strength, Ultimate 10.8 - 20.6 MPa1560 - 2990 psiASTM D638
Elongation at Break 70 - 110 %70 - 110 %ASTM D638
Compressive Strength 8.34 - 10.8 MPa1210 - 1560 psi1% Deformation; ASTM D695
Izod Impact, Notched (ISO) 8.50 - 9.00 kJ/m²4.04 - 4.28 ft-lb/in²ASTM D256
Coefficient of Friction 0.120.12
Coefficient of Friction, Static 0.110.11
Limiting Pressure Velocity 0.00360 - 0.00376 MPa-m/sec103 - 107 psi-ft/min3 m/min
 0.00409 - 0.00654 MPa-m/sec117 - 187 psi-ft/min30 m/min
 0.00490 - 0.00736 MPa-m/sec140 - 210 psi-ft/min300 m/min
 
Electrical PropertiesMetricEnglishComments
Volume Resistivity >= 1000 ohm-cm>= 1000 ohm-cmASTM D257
Surface Resistance >= 1.00e+7 ohm>= 1.00e+7 ohm50% rel. humidity; ASTM D257
 
Thermal PropertiesMetricEnglishComments
CTE, linear  95.0 - 100 µm/m-°C
@Temperature 25.0 - 100 °C		52.8 - 55.6 µin/in-°F
@Temperature 77.0 - 212 °F		ASTM D696
 110 - 120 µm/m-°C
@Temperature 25.0 - 200 °C		61.1 - 66.7 µin/in-°F
@Temperature 77.0 - 392 °F		ASTM D696
 130 - 150 µm/m-°C
@Temperature 25.0 - 300 °C		72.2 - 83.3 µin/in-°F
@Temperature 77.0 - 572 °F		ASTM D696
Thermal Conductivity 0.628 - 0.711 W/m-K4.35 - 4.93 BTU-in/hr-ft²-°F
Maximum Service Temperature, Air 270 °C518 °Fcontinuous
Minimum Service Temperature, Air -260 °C-436 °F

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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