PTFE GF25

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

• PTFE general brochure