Polytetrafluoroethylene - PTFE 25% Glass Fibre Filled

Polymer Type



Advantages of Polytetrafluoroethylene include:

  • Higher modulus and surface hardness than PTFE.
  • Improved creep resistance, dimensional stability and wear compared with PTFE.


Polytetrafluoroethylene has lower impact strength, lower tensile strength and can be more expensive than unmodified PTFE.


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.

Tell Us What You Think

Do you have a review, update or anything you would like to add to this article?

Leave your feedback
Your comment type