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  5. FEP-RF Release Film

FEP-RF Release Film

CHEMFILM FEP-RF Release Film
FEP Type RF, release film, is a clear or pigmented film manufactured from fluorinated ethylene propylene resin. FEP-RF is specifically desired for release applications. The non-stick surface, chemical resistance, and 205°C (400°F) usage temperature make Saint-Gobain's FEP an ideal release film for composite molding over a wide range of resin systems. High elongation and a smooth, low-gel film surface allow FEP to conform to complex mold contours and produce a smooth part finish. Perforated film is available to control out gassing and resin bleed. Pigmented film aids in identification on the shop floor and increases visibility of the film to prevent foreign object contamination (FOD) when removing the film from the parts and the mold.

 

 

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  • Features and Benefits
  • Typical Properties
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Features Benefits
Very low surface energy Easy de-molding, prevent damage and contamination of parts and the mold
Molding temperature range up to 205°C (400°F) Suitable for High temperature resin systems
Chemically inert Exceptional chemical resistance in aggressive environments
Available with pigment For easy identification
Available with C-Treatment Allows the film to be sealed easily to itself and other surfaces

CHEMFILM® FEP-FG Fluoropolymer Film Typical Physical Properties*

Typical Properties Test Method Value Units
General
Specific Gravity ASTM D-792 2.12-2.17  
Yield (1 mil)   18(90) m2/kg (ft2/lb)
Water Absorption, 24 hr.   <0.01 %
Mechanical
Tensile Strength @ Break (RT) ASTM D-882 24(3500) MPa (psi)
Elongation @ Break (RT) ASTM D-882 300 %
Tensile Modulus (RT) ASTM D-882 480(70000) MPa (psi)
Initial Tear Strength, 1mil ASTM D-1004 2.2-2.7(0.5-0.6) N(lbf)
Initial Tear Strength, 2mil ASTM D-1004 4.9-5.3(1.1-1.2) N(lbf)
Propagation Tear Strength, 1 mil ASTM D-1004 1.4-1.5(.32-.33) N(lbf)
Propagation Tear Strength, 2 mil ASTM D-1922 2.4-2.7 (0.55-0.60) N(lbf)
Fold Endurance (M.I.T) ASTM D-2176 10000 cycles
Electrical
Dielectric Strength, 1 mil ASTM D-149 240(6000) kV/mm (V/mil)
Dielectric Constant, 1 kHz ASTM D-150 2.1  
Dissipation Factor, 1 kHz ASTM D-150 0.0003  
Thermal
Melt Point ASTM D-3418 252-282(485-540) C (F)
Continuous Service Temperature   205 (400) C (F)
Specific Heat   1172(.28) J/(kg· oK) (BTU/(lb·oF))
Coefficient of Thermal Conductivity ASTM D-2863 0.195(1.35) W/(m· oK) BTU·in/(hr·ft2·oF)
Coefficient of Linear Thermal Expansion ASTM D-696 9.9x10-5(5.5x10-5) Mm/(mm·°C) (in/(in·°F))
Flammability UL-94 V-0  
Limiting Oxygen Index ASTM D-2863 95 %

*Represent typical performance properties and should not be used for specification purposes. Contact your Saint-Gobain Performance Plastics representative for more information.

 

 

 

Composite MoldingComposite Molding
Wind Turbine ManufacturingWind Turbine Manufacturing

 

  • CHEMFILM FEP datasheet
  • CHEMFILM FEP-RF safety datasheet
  • CHEMFILM Brochure
  • Products for Composite Molding Processes Brochure

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Saint-Gobain designs, manufactures and distributes materials and solutions which are key ingredients in the wellbeing of each of us and the future of all. They can be found everywhere in our living places and our daily life: in buildings, transportation, infrastructure and in so many industrial applications.

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