Sep 5 2001
Polymer Type
Thermoplastic
Advantages
Advantages of Polytetrafluoroethylene include:
- Higher modulus and surface hardness than PTFE.
- Improved creep resistance, dimensional stability and wear compared with PTFE.
Disadvantages
Polytetrafluoroethylene has lower impact strength, lower tensile strength and can be more expensive than unmodified PTFE.
Applications
Wear pads, piston rings, and microwave oven rotating platforms.
Typical Properties
| Property |
Value |
| Density (g/cm3) |
2.25 |
| Surface Hardness |
SD72 |
| Tensile Strength (MPa) |
17 |
| Flexural Modulus (GPa) |
1.00 |
| Notched Izod (kJ/m) |
0.12 |
| Linear Expansion (/°C x 10-5) |
12 |
| Elongation at Break (%) |
250 |
| Strain at Yield (%) |
N/Y |
| Max. Operating Temp. (°C) |
180 |
| Water Absorption (%) |
0.01 |
| Oxygen Index (%) |
95 |
| Flammability UL94 |
V0 |
| Volume Resistivity (log ohm.cm) |
15 |
| Dielectric Strength (MV/m) |
40 |
| Dissipation Factor 1 kHz |
0.003 |
| Dielectric Constant 1 kHz |
2.8 |
| HDT @ 0.45 MPa (°C) |
125 |
| HDT @ 1.80 MPa (°C) |
110 |
| Material. Drying hrs @ (°C) |
NA |
| Melting Temp. Range (°C) |
NA |
| Mould Shrinkage (%) |
NA |
| Mould Temp. Range (°C) |
NA |
Source : Abstracted from Plascams
For more information on Plascams please visit RAPRA Technology Ltd.