High frequency welding

In the case of high frequency welding, the welding heat is produced by molecular oscillations (frictional heat) directly in the plastic material to be welded. This produces even heating, even in the case of thick materials. As a result of the heat dissipation to the welding tool (electrode) and the pressure plate, the surface is protected while the maximum temperature is produced around the seam area, thus facilitating an ideal connection. HF welding or heating can be carried out with any polar material including plasticised and rigid PVC, polyurethane (TPU), certain polyamides (PA), certain polyesters (PES) and some types of TPO as well as composite materials with a sufficiently high percentage of HF-reactive materials.

For a fact sheet on the suitability of a plastic sheet click on this link. Materials which are not HF-reactive, e.g. textiles, can be welded using a plastic weld support sheet or HF-reactive glues.


  • Very high seam strength (up to 70% of that of the basic material)
  • Optimum seam quality thanks to the ideal temperature curve and cooling under pressure
  • Very thick plastic sheets can be welded
  • Tear and contour welding options (including three-dimensional)
  • Low power demand