PTFE (Teflon)
PTFE (Polytetrafluoroethylene), commonly known by the brand name Teflon, has the lowest coefficient of friction of any solid material and is chemically inert to virtually all chemicals. It operates from -200°C to +260°C.
Machinability
65/100
Tolerance
±0.05 mm
Category
Engineering Plastics
Material Properties
| Property | Value |
|---|---|
| Tensile Strength | 27 MPa (3.9 ksi) |
| Yield Strength | 12 MPa (1.7 ksi) |
| Hardness | Shore D55 |
| Density | 2.15 g/cm³ |
| Machinability Rating | 65/100 |
| Thermal Conductivity | 0.25 W/m·K |
| Melting Point | 327 °C |
| Tolerance | ±0.05 mm |
Common Grades
Virgin PTFEGlass-Filled PTFECarbon-Filled PTFEBronze-Filled PTFE
Advantages
- Lowest friction coefficient
- Chemically inert
- Extreme temperature range (-200 to 260°C)
- suitable for intended use
- Non-stick
Limitations
- Very low strength
- Creeps under load
- Difficult to hold tight tolerances
- Expensive
Common Applications
Seals
Gaskets
Bearings
Valve seats
Insulators
Chemical tank linings
Industries Served
Chemical ProcessingSemiconductorFood ProcessingMedicalAerospace
Available Surface Finishes
As-Machined