Fluoroplastics –


PTFE GF25 is a PTFE with added glass fibre (25%). Because of the additive, it has greater mechanical strength than pure PTFE. It also has higher load resistance than the pure PTFE material, making it suitable for bearings and sliding applications. We deliver PTFE GF25 as plastic sheets, rods, foils and hollow rods.

Physical properties
  Value Unit Test method
Specific gravity 2.24 g/cm3 DIN EN ISO 1183
Average molecular mass N/A
Water absorption, 24/96 h (23 °C) N/A
Weather-resistance poor
Combustibility HB UL 94 DIN EN ISO 527-2
Food safety no
Mechanical properties
  Value Unit Test method
Modulus of elasticity N/A
Tensile strength 17 MPa DIN EN ISO 527-2
Elongation at break N/A
Tensile strength at break 250 % DIN EN ISO 527-2
Flexural modulus N/A
Flexural strength N/A
Compressive modulus N/A
Compressive strength, 1%/2% N/A
Impact strength (Charpy) N/A
Notch impact strength (Charpy) N/A
Notch impact strength (Izod) kJ/m2 DIN EN ISO 180/2A
Toughness (ball pressure) N/A
Toughness (Shore D) 65 Sh D DIN EN ISO 868
Wear-resistance N/A
Coefficient of friction (against steel) 0.13 μ
Thermal properties
  Value Unit Test method
Glass-transition temperature N/A
Melting point N/A
Operating temperature (instantaneous) +240 °C
Operating temperature (continuous) 240 °C
Operating temperature (minimum) -100 °C
Thermal expansion coefficient, 23–60 °C N/A
Thermal expansion coefficient, 23–100 °C 9 10-5 K-1 DIN EN ISO 11359-1;2
Specific heat capacity N/A
Thermal conductivity N/A
Electrical properties
  Value Unit Test method
Surface resistivity N/A
Resistivity N/A
Dielectric strength N/A
CTI value N/A
Optical properties
  Value Unit Test method
Light transmittance N/A
Refractive index N/A
Optical errors N/A
Abrasion-resistance, 100 rotations with 500 g N/A

Additional downloads

Delivery selection sheets, bars, membranes, hollow bars
Specific gravity 2.24 g/cm3
Service temperature -100 … 240 °C
Price category €€€ (€26–50/kg)

Special properties

  • better than average ability to withstand loads
  • better than average wear-resistance
  • extremely high resistance to chemicals


pistons, insulating elements and bearings for applications requiring good wear- and chemical-resistance

Standard colours


Premade pieces


Commonly known brands