Polikim EFALON® K-35 PTFE, 35% Carbon Filled

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Polikim EFALON® K-35 PTFE, 35% 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.
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Physical Properties	Metric	English	Comments

Density	2.00 - 2.10 g/cc	0.0723 - 0.0759 lb/in³	ASTM D792
Deformation	0.30 - 1.8 % @Temperature 23.0 °C, Time 86400 sec, Pressure 13.7 MPa	0.30 - 1.8 % @Temperature 73.4 °F, Time 24.0 hour, Pressure 1990 psi	permanent; ASTM D621
	1.3 - 1.5 % @Temperature 150 °C, Time 86400 sec, Pressure 0.981 MPa	1.3 - 1.5 % @Temperature 302 °F, Time 24.0 hour, Pressure 142 psi	total
	2.3 - 4.3 % @Temperature 23.0 °C, Time 86400 sec, Pressure 13.7 MPa	2.3 - 4.3 % @Temperature 73.4 °F, Time 24.0 hour, Pressure 1990 psi	total; ASTM D621
	5.0 - 6.0 % @Temperature 150 °C, Time 86400 sec, Pressure 4.90 MPa	5.0 - 6.0 % @Temperature 302 °F, Time 24.0 hour, Pressure 711 psi	total

Mechanical Properties	Metric	English	Comments
Hardness, Shore D	66 - 70	66 - 70	ASTM D2240
Tensile Strength, Ultimate	10.8 - 15.7 MPa	1560 - 2280 psi	ASTM D638
Elongation at Break	55 - 90 %	55 - 90 %	ASTM D638
Compressive Strength	9.32 - 11.8 MPa	1350 - 1710 psi	1% Deformation; ASTM D695
Coefficient of Friction	0.16	0.16
Coefficient of Friction, Static	0.13	0.13
Limiting Pressure Velocity	0.00360 - 0.00376 MPa-m/sec	103 - 107 psi-ft/min	3 m/min
	0.00409 - 0.00654 MPa-m/sec	117 - 187 psi-ft/min	30 m/min
	0.004905 - 0.008175 MPa-m/sec	140.0 - 233.4 psi-ft/min	300 m/min

Electrical Properties	Metric	English	Comments
Volume Resistivity	>= 100 ohm-cm	>= 100 ohm-cm	ASTM D257
Surface Resistance	>= 10000 ohm	>= 10000 ohm	50% rel. humidity; ASTM D257

Thermal Properties	Metric	English	Comments
CTE, linear	75.0 - 80.0 µm/m-°C @Temperature 25.0 - 100 °C	41.7 - 44.4 µin/in-°F @Temperature 77.0 - 212 °F	ASTM D696
	90.0 - 110 µm/m-°C @Temperature 25.0 - 200 °C	50.0 - 61.1 µin/in-°F @Temperature 77.0 - 392 °F	ASTM D696
	120 - 140 µm/m-°C @Temperature 25.0 - 300 °C	66.7 - 77.8 µin/in-°F @Temperature 77.0 - 572 °F	ASTM D696
Thermal Conductivity	0.795 - 0.879 W/m-K	5.51 - 6.09 BTU-in/hr-ft²-°F
Maximum Service Temperature, Air	270 °C	518 °F	continuous
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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PPOLIK005 / 99815

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