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Fluorinated Ethylene Propylene Copolymer ( FEP )

Material Information

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We stock and supply the following standard forms:
Film Monofilament Rod Sheet
Film Monofilament Rod Sheet

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Common Brand Names:
Hostaflon FEP
 
General Description:  

General Description : A semi-crystalline perfluorinated polymer closely related to PTFE (FP30) being a copolymer of tetrafluoroethylene and hexafluoropropylene. Its properties are similar, but generally a little inferior to, those of PTFE but it has the great practical advantage of being melt-processable (though more expensive).

Compared in more detail to PTFE, it has similarly excellent chemical resistance and electrical properties (up to very high frequencies) and good weathering resistance. It has better radiation resistance and much higher impact strength but has lower maximum use and heat deflection temperatures and is even a little less stiff and strong. Though not quite crystal clear, it is transparent (essentially from 250/300 to 7000nm) and colourless or with a slight bluish tinge.

Applications include coatings and protective linings, chemical and medical equipment, extruded insulation and glazing film for solar panels.

   

Chemical Resistance

Acids - concentrated Good
Acids - dilute Good
Alcohols Good
Alkalis Good
Aromatic hydrocarbons Good
Greases and Oils Good
Halogenated Hydrocarbons Good
Halogens Good
Ketones Good

Electrical Properties

Dielectric constant @1MHz 2.1
Dielectric strength ( kV mm-1 ) 20 @ 3.2mm
Dissipation factor @ 1MHz 0.0007
Surface resistivity ( Ohm/sq ) 1016
Volume resistivity ( Ohmcm ) 1018

Mechanical Properties

Coefficient of friction 0.27-0.67
Elongation at break ( % ) 150-300
Hardness - Rockwell R25-45, 60 Shore D
Izod impact strength ( J m-1 ) No break
Poisson's ratio 0.48
Tensile modulus ( GPa ) 0.5 - 0.6
Tensile strength ( MPa ) 14 - 30

Physical Properties

Density ( g cm-3 ) 2.15
Flammability V0
Limiting oxygen index ( % ) 95
Radiation resistance Poor
Refractive index 1.344
Resistance to Ultra-violet Excellent
Water absorption ( % ) 0.01

Thermal Properties

Coefficient of thermal expansion ( x10-6 K-1 ) 83 - 104
Heat-deflection temperature - 0.45MPa ( C ) 50
Heat-deflection temperature - 1.8MPa ( C ) 70
Lower working temperature ( C ) -250
Specific heat ( J K-1 kg-1 ) 1100
Thermal conductivity @23C ( W m-1 K-1 ) 0.19 - 0.24
Upper working temperature ( C ) 150 - 200

Properties for Fluorinated Ethylene Propylene Copolymer Film

Property Value
Permeability to Carbon Dioxide @25C x10-13 cm3. cm cm-2 s-1 Pa-1 10
Permeability to Hydrogen @25C x10-13 cm3. cm cm-2 s-1 Pa-1 10
Permeability to Nitrogen @25C x10-13 cm3. cm cm-2 s-1 Pa-1 1
Permeability to Oxygen @25C x10-13 cm3. cm cm-2 s-1 Pa-1 3
Permeability to Water @25C x10-13 cm3. cm cm-2 s-1 Pa-1 13
Permeability to Water @38C x10-13 cm3. cm cm-2 s-1 Pa-1 40
All information and technical data are given as a guide only. Although every effort has been made to ensure that the information is correct, no warranty is given as to its completeness or accuracy.

Buy Fluorinated Ethylene Propylene Copolymer on-line

We stock and supply the following standard forms:
Film Monofilament Rod Sheet
Film Monofilament Rod Sheet

Choose a form to search our on-line catalog  

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