HTF-621
DESCRIPTION
HTF-621 is a generation of film combining the chemical inertness and universal non-stick properties of PTFE polymers with maximum conformability and heat resistance. A bright blue color has been incorporated to enhance visibility on cured and uncured parts.
Compare the data shown for HTF-621 versus other materials typically used in composite fabrication in order to understand the superior performance particularly for complex shapes and high temperature resins. Note the ultra-high elongation.
| Elongation | Max. Temp | |||
| % | °F | |||
| HTF-621 | 450 | 600 | ||
| Teflon FEP | 300 | 500 | ||
| Teflon PFA | 430 | 550 | ||
| Tedlar PVF | 190 | 350 | ||
| Halar ECTFE | 200 | 350 | ||
| Kapton Polyimide | 90 | 750 | ||
| Nylon 6 – Polyamide | 370 | 450 |
*10 inch grip separation, 1 in/min crosshead speed, 1 inch width.
**2 inch grip separation, 20 in/min crosshead speed, 1/2 inch width.
Application
Outstanding temperature range: rated at 600ºF for composite fabrication. HTF-621 will withstand even higher autoclave temperatures under appropriate conditions. Consider HTF-621 for the most advanced thermoset and thermoplastic resin systems with epoxy, phenolic, bismaleimides, polyimides and other high temperature resins.
Unmatched drapability in the curing temperature range of epoxy, phenolic, BMI and comparable resins (350-400ºF), as well as at higher temperatures (600+ºF) where
HTF-621, in fact, proves to be the only conformable yet thermally stable film available. Improve efficiency and costs in the manufacture of contoured parts by using HTF-621 to reduce set-up times and reject rates.
Properties
| Mechanical Properties | ASTM Method | |||
| Tensile Strength at break** | D-882-83 | 4300 psi | ||
| Elongation** | D-882-83 | 550% | ||
| Elastic modulus* | D-882-83 | 55000 psi | ||
| Yield Stress* | D-882-83 | 1400 psi | ||
| Yield Strain* | D-882-83 | 2.5% | ||
| Density | D-1505 | 2,15 g/cm³ | ||
| Thermal Properties | ||||
| Melt Point | D-1457-83 | 621°F(327°C) |
*10 inch grip separation, 1 in/min crosshead speed, 1 inch width
**2 inch grip separation, 20 in/min crosshead speed, 1/2 inch width
Roll Lengths & forms:
HTF-621 non-perforated, P or P3 perforated films to accomodate all vacuum molding techniques.
48″ x .001 x 500′
48″ x .002 x 250′