Frequently Asked Questions
RF welding relies on the vibration and orientation of charged molecules within the polymer chain to generate heat; consequently its use is restricted to plastics containing polar molecules. Polyvinylchloride (PVC) and polyurethanes are the most common thermoplastics to be welded by the RF process. It is possible to RF weld other polymers including nylon, PET, EVA and some ABS resins, but special conditions are required. For example, nylon and PET are weldable if preheated welding bars are used in addition to the RF power. RF welding is generally not suitable for PTFE, polycarbonate, polystyrene, polyethylene or polypropylene. However, due to the impending restrictions in the use of PVC, a special grade of polyolefin has been developed which does have the capability to be RF welded.
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