Polytetrafluoroethylene – PTFE 15% Graphite Filled
Polymer Type
Thermoplastic
Advantages
Low coefficient of friction compared to other filled PTFE materials. Higher flexural modulus and surface hardness than unmodified PTFE.
Disadvantages
Lower notched impact strength, tensile strength, elongation at break and electrical characteristics compared with unmodified PTFE. Tendency of graphite to leach out.
Typical Properties
Property
Value
Density (g/cm3)
2.11
Surface Hardness
SD67
Tensile Strength (MPa)
17
Flexural Modulus (GPa)
1.03
Notched Izod (kJ/m)
0.14
Linear Expansion (/°C x 10-5)
12
Elongation at Break (%)
240
Strain at Yield (%)
65
Max. Operating Temp. (°C)
180
Water Absorption (%)
0.01
Oxygen Index (%)
95
Flammability UL94
V0
Volume Resistivity (log ohm.cm)
NA
Dielectric Strength (MV/m)
NA
Dissipation Factor 1kHz
0.0007
Dielectric Constant 1kHz
NA
HDT @ 0.45 MPa (°C)
120
HDT @ 1.80 MPa (°C)
95
Material. Drying hrs @ (°C)
NA
Melting Temp. Range (°C)
NA
Mould Shrinkage (%)
NA
Mould Temp. Range (°C)
NA
Applications
Bearings, antistatic applications, wear pads, piston rings.
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