Engineering Plastics

PTFE Glass Filled

PTFE has poor creep and wear resistance. These properties can be improved with the addition of a glass filler. This filler improves dimensional stability, raises the heat deflection temperature and improves creep resistance.

Its main characteristics are:

Extremely good chemical resistance against virtually all media
Wide temperature range (-260ºC to +250ºC)
Good sliding properties
Improved dimensional stability
Improved creep resistance
Very good electrical insulation properties
White / light grey in colour

The preferred fields for the use of PTFE are: chemical engineering, machine parts, transport and conveyor technology, pump and instrument construction, electrical industry, electronics, laser technology, fume purification, pure water production, cryogenics, filter technology, food and medical technology.

Popular applications for the use of PTFE are:

Pump housings
Valve seats
Gaskets
Roller coverings
Slide bearings
Filter housings
Etching plates
High frequency insulation
Pump parts
Shaft Seals
Slide runners

Technical Information:

Information to be used as a guide only. It corresponds with our current knowledge and indicates possible applications. We cannot guarantee suitability for a specific application. Unless otherwise stated these values represent averages taken from injection moulded samples.

Properties	Unit	Test Method DIN ASTM	Result
Mechanical	-	-	-
Density	g/cm³	53479	2.2 - 2.26
Tensile strength at yield	MPa	53455	12-19
Tensile strength at break	MPa	53455	-
Elongation at Break	%	53455	200-300
Modulus of elasticity in tension	MPa	53457	168-320
Modulus of elasticity in flexure	MPa	53457	-
Ball indentation hardness	MPa	53456	-
Impact strength (Charpy)	KJ/m²	53453	-
Creep rupture strength after 1000 hours with static load	MPa	-	-
Time yield limit for 1% elongation after 1000 hours	MPa	-	-
Coefficient of friction against hardened and ground steel p+0,05 N/mm2, v=0,6 m/s	-	-	-
Wear conditions as above	µm/km	-	-
Thermal	-	-	-
Crystalline melting point	ºC	53736	327
Glass transition temperature	ºC	53736	-
Heat distortion temperature method A	ºC	ISO 75	5.5
Heat distortion temperature method B	ºC	ISO 75	121
Max. service temperature short term	ºC	-	290
Max. service temperature long term	ºC	-	250
Coefficient of thermal conductivity	W/(m K)	-	0.46
Specific heat	J/(g K)	-	-
Coefficient of thermal expansion	10-5/K	-	4-10
Electrical	-	-	-
Dieletric constant at 10 (5) Hz	-	53483	2.1
Dielectric loss factor at 10(5) Hz	-	53483	-
Specific Volume Resistance	Ωcm	53482	>2 x 10 (15)
Surface Resistance	O	53482	-
Dieletric strength 1mm	kV/mm	53481	>8
Tracking resistance	-	53480	-
Miscellaneous	-	-	-
Moisture Absorption: Equiibrium in standard atmosphere (23ºC / 50% relative humidity)	%	53714	<0.14
Water absorption at saturation at 23ºC	%	53495	-
Resistance to hot water, washing soda	-	-	resistant
Flamability	-	UL 94	VO
Resistance to weathering	-	-	resistant

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