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- SEFAR® Architecture TENARA® Fabric comes with a protective film layer on both sides. This must be removed from the fabric before welding.
- It is important to insure that the fabric and the RF welding components are clean. Dirt on these surfaces can transfer to the fabric seams during the welding process.
- See the side-view diagram below for placement of components in the RF welder.
- Satisfactory welds can be made using Hi-Seal or an equivalent buffer (0.010 inch/0.25 mm thick polyester film-covered paper) on the lower platen, and putting a release film between the upper bar and the fabric. Silicone-coated fiberglass cloth SRC-5 from Saint Gobain Performance Plastics is a typical release film, 0.003 inch/0.08 mm thick PTFE-coated fiberglass fabric also works well.
- Typical process times are 3 seconds pre-seal, 6 seconds weld, and 3 seconds cool down.
- It is good practice to have the upper bar temperature controlled for repeatable welds. 158°F/70°C is a typical control temperature.
- Approximately 1 kilowatt of RF power per 5 square inches/32 square centimeters of weld area is a good estimate of the power required.
- To insure that a satisfactory weld has been made, test the completed weld for the strength required.
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