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Formula: PTFE
Form: Bar
Material: Polytetrafluoroethylene (PTFE)
CAS Number: 9002-84-0
Commodity: Polymers
Side Length: 12.6mm
Side Length (Longer): 4.7mm
Goodfellow’s PTFE Bar is available in 8 variations for a choice of dimensions to suit different applications. Known for properties like low friction, chemical resistance and a high melting point, PTFE Bars have uses across science and industry - from bearings and seals to chemical processing equipment and non-stick coatings. Whether for experimental or large-scale production, our PTFE Bars provide the high-quality fluoropolymer performance you need.
Technical Data Sheet Safety Data Sheet Tolerance Properties
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Tolerances

Bar
Side Length =<10mm ±10%
Side Length >10mm ±1mm
Side Length (Of Longer Side) >10mm ±1mm
Side Length (Of Longer Side) =<10mm ±10%
Length <100mm ±1mm
Length >=100mm +5% / -1%

Material Properties for Polymers

Chemical Resistance
Element Value
Acids - concentrated Good
Acids - dilute Good
Alcohols Good
Alkalis Good
Aromatic hydrocarbons Good
Greases and Oils Good
Halogenated Hydrocarbons Good
Halogens Good
Ketones Good
Mechanical Properties
Element Value
Coefficient of friction 0.05-0.2
Hardness - Rockwell D50-55 - Shore
Poisson's ratio 0.46
Elongation at break( % ) 400
Tensile modulus( GPa ) 0.3-0.8
Izod impact strength( J m⁻¹ ) 160
Tensile strength( MPa ) Oct-40
Electrical Properties
Element Value
Dielectric constant @1MHz 2-2.1
Dissipation factor @ 1MHz 0.0003-0.0007
Dielectric strength( kV mm⁻¹ ) 50-170
Surface resistivity( Ohm/sq ) 10¹⁷
Volume resistivity( Ohmcm ) 10¹⁸-10¹⁹
Physical Properties
Element Value
Flammability V0
Radiation resistance Poor
Refractive index 1.38
Resistance to Ultra-violet Excellent
Limiting oxygen index( % ) 95
Water absorption - over 24 hours( % ) 0.01
Density( gcm⁻³ ) 2.2
Thermal Properties
Element Value
Heat-deflection temperature - 0.45MPa( C ) 120
Heat-deflection temperature - 1.8MPa( C ) 54
Lower working temperature( C ) -260
Upper working temperature( C ) 180-260
Specific heat( J K⁻¹ kg⁻¹ ) 1000
Thermal conductivity( W m⁻¹ K⁻¹ ) 0.25@23°C
Coefficient of thermal expansion( x10⁻⁶ K⁻¹ ) 100-160

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