Modified Polytetrafluoroethylene ( TFM )

Modified Polytetrafluoroethylene ( TFM )

Description

TFM is a chemically modified version of PTFE that has improved capabilities over Virgin PTFE. Some of the advantages include reduced cold flow, much lesser deformation under load, smoother surface and much better flexibility.

In addition to the properties of PTFE, Modified PTFE has the folowing properties...

  • Part surfaces are smoother, and less porous - components stay clean since they are less likely to trap contaminants
  • Low micro-void content yields improved permeation resistance
  • Longer flex life than PTFE
  • Increased stiffness & improved creep resistance
  • Higher dielectric strength yields superior high-voltage insulation

Application

Application Limitations:
• Higher Cost
• Not recomended for very high preassure applications.
Usage:
• Gaskets, Seals, Ball Valve Seats etc.

Physical properties-VIRGIN PEEKLUBRICATED PEEKPCTFE
Colour-TanBlackWhite translucent
Specific GravityD7921.341.462.11
Hardness Shore DD224018300 (126)8780
Compressive Strength, psi (Mpa)D6958824,350 (168)5800 (40)
Elongation at Break %D63827.001.95150
Tensile Strength (Mpa)D63813,500 (93)20,300 (140)5800 (40)
Tensile Strength (Mpa)--40 to +260-40 to +260-240 to +204