High-Frequency Welding

High-Frequency Welding is a process that uses a high-frequency electromagnetic field to cause internal molecular friction in polar materials such as plastic, PVC, and TPU, generating heat to fuse them together under pressure. In foreign trade, this term is commonly found in industries such as plastic products, packaging, medical supplies, inflatable products, and automotive interiors, especially involving the joining of PVC flexible films, foam, and leather. Usage scenarios include: customers requiring products to use high-frequency welding, inquiry specifications noting 'high-frequency welding', or contracts specifying welding strength and sealing standards. Precautions: It is necessary to clarify whether the material is suitable for high-frequency welding (non-polar materials such as PE and PP are usually not), and confirm parameters such as molds, voltage, and frequency; compared with hot-press welding and ultrasonic welding, high-frequency welding is more suitable for large-area, complex-shaped joints requiring water and air tightness, but equipment costs are higher, and it is sensitive to material thickness and formulation. Foreign trade practitioners should note the process in quotations and specification sheets to avoid returns or claims due to process mismatch.