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Formula: FEP
Form: Coil
Material: Fluorinated ethylene propylene (FEP)
CAS Number: 25067-11-2
Commodity: Polymers
Transparency: Clear/Transparent
The FEP Copolymer Coil is available in a total of 105 variations. A fluorinated ethylene propylene copolymer film, it features excellent chemical resistance and electrical insulating properties. With its low friction surface, FEP film finds use as a non-stick coating and as a high-performance electrical insulator in cables and wiring. The different coil sizes and thicknesses in Goodfellow's FEP Copolymer Coil range allow flexibility for industrial applications needing specific dimensions or properties.
Technical Data Sheet Safety Data Sheet Tolerance Properties
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Tolerances

Coil
Thickness ±20%

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 0.27-0.67
Hardness - Rockwell R25-45, 60 Shore D
Poisson's ratio 0.48
Elongation at break( % ) 150-300
Tensile modulus( GPa ) 0.5-0.6
Izod impact strength( J m⁻¹ ) 999999No Break
Tensile strength( MPa ) 14-30
Electrical Properties
Element Value
Dielectric constant @1MHz 2.1
Dissipation factor @ 1MHz 0.0007
Dielectric strength( kV mm⁻¹ ) 20@3.2mm
Surface resistivity( Ohm/sq ) 10¹⁶
Volume resistivity( Ohmcm ) 10¹⁸
Physical Properties
Element Value
Flammability V0
Radiation resistance Poor
Refractive index 1.344
Resistance to Ultra-violet Excellent
Limiting oxygen index( % ) 95
Water absorption( % ) 0.01
Density( gcm⁻³ ) 2.15
Thermal Properties
Element Value
Heat-deflection temperature - 0.45MPa( C ) 50
Heat-deflection temperature - 1.8MPa( C ) 70
Lower working temperature( C ) -250
Upper working temperature( C ) 150-200
Specific heat( J K⁻¹ kg⁻¹ ) 1100
Thermal conductivity( W m⁻¹ K⁻¹ ) 0.19-0.24@23°C
Coefficient of thermal expansion( x10⁻⁶ K⁻¹ ) 83-104

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