... efficient. 4KW full-auto rotary PVC welder , high frequency welder1.Using a high Q value vibration tube in the machine, so it ... electromagnetic current electric fields, use the processed PVC, TPU, EVA, PET and other plastics material, the internal molecular of the ... and welding packing, such as: blister sealing, PVC plastic foam sealing, PVC blister welding, PVC plastic blister welding, battery ...