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.
| 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.
