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FEP-WF Welding Film
FEP Type WF, mechanical welding grade film, is an ideal economical solution for applications that don't require high aesthetic standards, such as hot melt adhesive (welding tape) application. FEP WF film possesses all physical, mechanical, and thermal properties of FEP FG grade, while offering up to 25% savings.
| Features | Benefits |
|---|---|
| Functional temperature range from -254°C (-425°F) to 205°C (400°F) | Suitable for extreme indoor and outdoor sealing and welding use |
| Super dielectric properties | Excellent electrical insulation properties |
| Chemically inert | Exceptional chemical resistance in aggressive environments |
| UV Stable | Long term performance in outdoor applications |
| Available with pigment | For easy identification |
| Available with C-Treatment | Provides cementable surface on one or both sides of the film |
| 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 | % |
