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Formula: FEP
Form: Foil/Film/Sheet
Material: Fluorinated ethylene propylene (FEP)
CAS Number: 25067-11-2
Commodity: Polymers
FEP Copolymer Film, also known as fluorinated ethylene propylene film, is a high-performance polymer characterized by its excellent chemical resistance, high thermal stability, and outstanding electrical insulation properties. These key attributes make it ideal for a wide range of applications, including aerospace, electronics, and chemical processing industries. FEP Copolymer Film is particularly valued for its use in flexible printed circuits, wire and cable insulation, and as a protective barrier in harsh chemical environments. Goodfellow offers premium FEP Copolymer Film that meets stringent industry standards, ensuring reliable and consistent performance. The versatility and durability of FEP Copolymer Film make it a preferred choice for engineers and manufacturers seeking high-quality materials for critical applications.
Technical Data Sheet Safety Data Sheet Tolerance Properties
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Tolerances

Foil/Film/Sheet
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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