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Properties for Molded Polytetrafluoroethylene (PTFE)
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Physical Properties
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Metric
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English
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Bulk Density
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0.300 - 0.930 g/cc
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0.0108 - 0.0336 lb/in³
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Density
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0.700 - 2.30 g/cc
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0.0253 - 0.0831 lb/in³
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Apparent Bulk Density
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0.360 - 0.950 g/cc
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0.0130 - 0.0343 lb/in³
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Water Absorption
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0.000 - 0.100 %
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0.000 - 0.100 %
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Particle Size
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0.250 - 800 µm
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0.250 - 800 µm
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pH
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9.5
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9.5
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Viscosity
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19.0 - 25.0 cP
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19.0 - 25.0 cP
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1.00e+13 - 1.00e+15 cP
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1.00e+13 - 1.00e+15 cP
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@Temperature 340 - 380 °C
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@Temperature 644 - 716 °F
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Thickness
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12.0 - 25.0 microns
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0.472 - 0.984 mil
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Linear Mold Shrinkage
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0.0200 - 0.0580 cm/cm
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0.0200 - 0.0580 in/in
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Deformation
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0.200 - 14.0 %
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0.200 - 14.0 %
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Surface Tension
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32.0 - 35.0 dynes/cm
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32.0 - 35.0 dynes/cm
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Mechanical Properties
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Metric
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English
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Hardness, Shore D
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50.0 - 65.0
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50.0 - 65.0
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Ball Indentation Hardness
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27.0 - 37.0 MPa
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3920 - 5370 psi
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Tensile Strength, Ultimate
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10.0 - 45.0 MPa
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1450 - 6530 psi
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Tensile Strength, Yield
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0.862 - 41.4 MPa
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125 - 6000 psi
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Elongation at Break
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40.0 - 650 %
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40.0 - 650 %
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Modulus of Elasticity
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0.392 - 2.25 GPa
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56.9 - 326 ksi
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Flexural Modulus
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0.490 - 3.36 GPa
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71.1 - 488 ksi
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Flexural Yield Strength
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14.0 - 27.6 MPa
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2030 - 4000 psi
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Compressive Yield Strength
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1.50 - 23.4 MPa
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218 - 3400 psi
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Shear Strength
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9.31 - 25.5 MPa
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1350 - 3700 psi
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Izod Impact, Unnotched
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1.60 J/cm
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3.00 ft-lb/in
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Charpy Impact, Notched
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0.500 - 1.90 J/cm²
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2.38 - 9.04 ft-lb/in²
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Coefficient of Friction
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0.00800 - 0.280
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0.00800 - 0.280
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Coefficient of Friction, Static
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0.0200 - 0.0800
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0.0200 - 0.0800
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K (wear) Factor
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403 - 5040 x 10-8 mm³/N-M
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200 - 2500 x 10-10 in³-min/ft-lb-hr
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Taber Abrasion, mg/1000 Cycles
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0.000 - 41.8
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0.000 - 41.8
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Izod Impact, Notched
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1.30 - 1.57 J/cm
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2.44 - 2.94 ft-lb/in
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Electrical Properties
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Metric
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English
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Electrical Resistivity
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1.00e+10 - 1.10e+18 ohm-cm
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1.00e+10 - 1.10e+18 ohm-cm
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Surface Resistance
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1.00e+10 - 1.00e+18 ohm
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1.00e+10 - 1.00e+18 ohm
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Dielectric Constant
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2.00 - 12.0
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2.00 - 12.0
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Dielectric Strength
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10.0 - 165 kV/mm
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254 - 4200 kV/in
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Dissipation Factor
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0.0000100 - 0.0360
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0.0000100 - 0.0360
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Arc Resistance
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300 - 420 sec
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300 - 420 sec
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Comparative Tracking Index
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600 V
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600 V
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Thermal Properties
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Metric
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English
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CTE, linear
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14.0 - 250 µm/m-°C
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7.78 - 139 µin/in-°F
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120 - 170 µm/m-°C
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66.7 - 94.4 µin/in-°F
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@Temperature 30.0 - 300 °C
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@Temperature 86.0 - 572 °F
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Specific Heat Capacity
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1.00 - 1.05 J/g-°C
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0.239 - 0.251 BTU/lb-°F
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0.960 - 1.03 J/g-°C
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0.229 - 0.246 BTU/lb-°F
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@Temperature 0.000 - 50.0 °C
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@Temperature 32.0 - 122 °F
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Thermal Conductivity
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0.240 - 4.07 W/m-K
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1.67 - 28.2 BTU-in/hr-ft²-°F
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Melting Point
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135 - 340 °C
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275 - 644 °F
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Maximum Service Temperature, Air
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93.3 - 316 °C
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200 - 600 °F
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Deflection Temperature at 1.8 MPa (264 psi)
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50.0 - 100 °C
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122 - 212 °F
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Minimum Service Temperature, Air
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-268 - -200 °C
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-450 - -328 °F
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Flammability, UL94
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V-0
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V-0
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Oxygen Index
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92.0 - 95.0 %
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92.0 - 95.0 %
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Processing Properties
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Metric
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English
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Mold Temperature
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370 °C
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698 °F
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Injection Pressure
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16.0 - 30.0 MPa
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2320 - 4350 psi
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Back Pressure
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15.0 - 40.0 MPa
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2180 - 5800 psi
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