Is high-frequency machine heat sealing used for building membrane materials

High-frequency Machine (High-frequency Welding Machine/High-frequency Generator) can perform heat sealing processing by utilizing a high-frequency electromagnetic field to induce molecular polarization and friction-generated heat in the material, thereby achieving welding. Below is a detailed explanation of the heat sealing process using a high-frequency machine:

Principle of High-Frequency Heat Sealing

Electromagnetic Induction Heating:

• The high-frequency machine generates a high-frequency current (typically 13.56 MHz or 27.12 MHz) through a high-frequency generator, creating a high-frequency electromagnetic field between the electrode and the workpiece.
• Polar molecular materials (e.g., plastics or rubbers containing polar groups such as PVC, PET, PU, TPU): Molecules rapidly vibrate under the electromagnetic field, generating frictional heat that causes localized melting of the material.
• Non-polar materials (e.g., PE, PP): Require the addition of magnetic powders or modification treatment to enable heating.

Heat Sealing Process:

• The material is clamped between the upper and lower electrodes, and the high-frequency electromagnetic field penetrates it.
• Molecular vibration generates heat, melting the contact surfaces.
• Pressure is applied to fuse the molten portions, and after cooling, a strong welded seam is formed.