The insulating properties of PTFE limit its application in many situations where electrical conductivity is required. By filling the conductive filler to change the conductive behavior of PTFE and adjust the interface bonding performance between the filler and the matrix, a high-performance PTFE conductive composite material can be obtained.
Commonly used conductive fillers for PTFE are mainly carbon black, carbon nanotubes, carbon fibers, graphite, graphene, copper powder, silver powder, etc. Conductive composite materials prepared from traditional conductive fillers, such as carbon fiber (CF) and graphite, have the advantages of low price and a wide range of raw materials.
Figure 1. Variation of conductivity at 1 Hz of PTFE composites with respect to carbon black filler loading 
Figure 2. The electrical conductivity of the CNT-filled PTFE film 
|Density||1.90 - 2.19 g/cc||Average value: 2.10 g/cc|
|Linear Mold Shrinkage||0.014 - 0.045 cm/cm||Average value: 0.0240 cm/cm|
|Hardness, Shore D||52 - 70||Average value: 63.3|
|Tensile Strength, Ultimate||8.00 - 39.0 MPa||Average value: 17.9 MPa|
|Elongation at Break||30 - 350 %||Average value: 161 %|
|Compressive Yield Strength||7.00 - 23.4 MPa||Average value: 11.7 MPa|
|Shear Strength||14.479 - 19.3053 MPa |
@Temperature 26.7 - 149 °C
|Average value: 16.9 MPa|
|Coefficient of Friction||0.060 - 0.24||Average value: 0.0977|
|Coefficient of Friction, Static||0.050 - 0.20||Average value: 0.0913|
|K (wear) Factor||12.0 - 60.4 x 10-8 mm³/N-M||Average value: 26.4 x 10-8 mm³/N-M|
|Electrical Resistivity||1000 - 1.00e+11 ohm-cm||Average value: 1.25e+10 ohm-cm|
|Surface Resistance||1000 - 1.00e+12 ohm||Average value: 3.33e+11 ohm|
|CTE, linear||65.0 - 160 µm/m-°C||Average value: 121 µm/m-°C|
|Thermal Conductivity||0.590 - 0.800 W/m-K||Average value: 0.643 W/m-K|
|Maximum Service Temperature, Air||260 - 300 °C||Average value: 263 °C|
|Minimum Service Temperature, Air||-200 °C||Average value: -200 °C|
Note: The comments report the average value and are for customer reference only.
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