MR and VB Films for Composite Molding
CHEMFILM® MR films (mold release films) combine the chemical inertness and universal non-stick properties of PTFE polymers with maximum conformability and heat resistance. Compare the data for CHEMFILM MR versus other materials typically used in composite fabrication in order to understand its superior performance, particularly for complex shapes and high temperature resins
| Film Product | Elongation (%) | Max Temp. (°F) |
|---|---|---|
| CHEMFILM MR | 450 | 600 |
| Teflon® PFA | 430 | 550 |
| Teflon® FEP | 300 | 500 |
| Tedlar® PVF | 190 | 350 |
| Halar® ECTFE | 200 | 350 |
| Kapton® Polyimide | 90 | 750 |
| Tedlar® Polyimide | 370 |
450 Bottom of Form |
| Benefits |
|---|
| Continuous service temperature range from -200 to +260°C (-328 to 500°F). Intermittent use has been proven up to 315°C (600°F) |
| Exhibits superior release qualities over the entire temperature range |
| High elongation and unmatched drapability allows for superior conformability for irregular shapes |
| High temperature performance for PMR-15, polyimides, PEEK and other high temperature resin systems |
| Typical Properties | Test Method | Value | Units |
|---|---|---|---|
| Tensile Strength | ASTM D-882 | 31.0 (4,500) | MPa (psi) |
| Elongation | ASTM D-882 | 400 | % |
| Elastic Modulus | ASTM D-882 | 379 (55,000) | MPa (psi) |
| Yield Stress | ASTM D-882 | 9.65 (1,400) | MPa (psi) |
| Resistance to Tear Initiation | ASTM D-1004 | 3.4(500) | MPa (psi) |
| Propagating Tear Strength | ASTM D-1938 | 0.045(0.10) | kgF(lbs.) |
| Bursting Strength | ASTM D-774 | 0.51(75) | MPa (psi) |
| Dimensional Stability | 30 Min 500oF | 3% Shrinkage Max | |
| Coefficient of Linear Thermal Exp. | ASTM D-696 | 5.5 x 10-5 | in./in. oF |
| Continuous Service Temperature | -188 to 260 (-400 to 500) | oC (oF) |
