PTFE has an impressive array of Physical, Chemical and mechanical properties that make it the material of choice
for the most demanding applications.
Physical Properties of PTFE & Filled PTFE Compositions
Sr. No. | Property | Unit | Virgin PTFE | Chemically Modified PTFE | 15% Glass Filled PTFE | 25% Glass Filled PTFE | 15% Glass Fibre + 5% MoS2 Filled PTFE | 25% Carbon# Filled PTFE | 35% Carbon# Filled PTFE | 15% Graphite Filled PTFE | 40% Bronze Filled PTFE | 60% Bronze Filled PTFE | 55% Bronze+5% MoS2 |
1 | Density | gm/cc | 2.1-2.2 | 2.15 – 2.2 | 2.10-2.24 | 2.24-2.25 | 2.23-2.24 | 2.10-2.20 | 2.11-2.13 | 2.14-2.16 | 3.1-3.2 | 3.80-4.00 | 3.8-4.00 |
2 | Tensile Strength | kgf/cm2 | 210-375 | 325 | 150-225 | 125-200 | 150-220 | 125-200 | 100-175 | 150-200 | 125-150 | 105-140 | 110-145 |
3 | Elongati-on of break | % | 250-400 | 400-450 | 225-325 | 200-300 | 220-320 | 100-150 | 90-125 | 175-225 | 100-175 | 150-300 | 150-300 |
4 | Hardness | Shore D | 60-65 | 60-65 | 65-70 | 70-75 | 62-68 | 70-75 | 72-80 | 60-65 | 70-75 | 70-75 | 70-75 |
5 | Compre-ssive Strength | kgf/cm2 | 40-50 | 45-55 | 65-75 | 75-85 | 65-75 | 75-85 | 80-90 | 65-75 | 85-100 | 115-125 | 115-125 |
6 | Water Absorption | % | 0 | 0 | 0.015 | 0.013 | 0.015 | 0 | 0 | 0 | 0 | 0 | 0 |
7 | Thermal Condu-ctivity | 10-4 cal cm S0C | 6 | 6 | 8 | 9 | 9 | 13 | 14 | 14 | 17 | 19 | 19 |
8 | Dielectric Strength | Kv/mm | 24 | 30-35 | 16 | 12 | 16 | 2 | 2 | 2 | Conductive | Conductive | Conductive |
9 | Volume Resistivity | ohm cm | 1018 | 1020 | 1015 | 1015 | 1015 | 104 | 104 | 103 | 107 | 107 | 107 |
10 | Surface Resistivity | ohm | 1015 | 1018 | 1015 | 1015 | 1015 | 107 | 107 | 106 | 109 | 109 | 1010 |