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

PropertyValue
Tensile Strength27 MPa (3.9 ksi)
Yield Strength12 MPa (1.7 ksi)
HardnessShore D55
Density2.15 g/cm³
Machinability Rating65/100
Thermal Conductivity0.25 W/m·K
Melting Point327 °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)
  • FDA-approved
  • 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

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