Heat Sealing
TEFLON®/TEFZEL® Films and Products
Heat sealing is the thermal fusion of two (or more) melt-bond compatible thermoplastic materials. All heat seals require the precise control of heat, time, and pressure to create a quality weld. Thermal Impulse heat sealing is the process of welding thermoplastic films together by means of a resistance ribbon(s) through a cycle of heating and cooling under pressure. By controlling the rate of heating and cooling superior welds are created without sacrificing the physical property values of the original film. Thermal impulse techniques are used to make bags, lay flat tubing, large panels, protective garments, heat exchangers, geodesic domes, and other unique shapes that solve specific problems.
Heat Sealed Fluoropolymer Properties
- Chemical Inertness – sampling bags & container liners
- Low Permeability – gas sampling bags
- Resilience to Weather – environmental chambers
- Optical Clarity – solar collectors
- Temperature Resistance – cryogenic bags -400ºF to 400ºF
- Releaseability – rubber & silicone encapsulated gaskets
- Dielectric Properties – electrical resistance
- Flammability – non-combustible human escape hoods
Heat Sealed Characteristics
- Seal length – Unlimited
- Seal widths – 1/8", 1/4" and 3/8"
- Seal types – Fin seam, Overlap seam, Butt seam
- Configurations – Lay-flat bags, cubical enclosures, tank liners, protective hoods, and lay-flat tubing. A wide variety of shapes can be produced, including heat sealing flat sheets to thermoformed parts or heat sealing thermoformed parts to themselves.
Heat Sealed Film Options
- TEFLON® FEP & TEFLON® PFA
- KAPTON® PI
- TEFZEL® ETFE
- TEDLAR® PVF
- PEEK™
- Aclar®
Click here to view our DuPont Technical Specifications
TEFLON® is a registered trademark of DuPont Co.