What Materials Can Be Welded by an Ultrasonic Welding System?
Ultrasonic welding is a process that uses high-frequency mechanical vibrations to join materials together. It is commonly used for thermoplastic materials, where the vibrations generate heat that softens the material at the interface and allows bonding. Some plastics are not suitable for ultrasonic welding, so it matters to know which materials seal well on an ultrasonic machine.
Materials that can be welded
- Thermoplastics — the most common application. ABS, PE, PP, PVC, PC and more can be welded effectively, which is why the process is widely used in the auto-parts industry.
- Non-ferrous metals — some low-melting-point non-ferrous metals can be welded too, such as aluminium, copper and nickel.
- Synthetic fabrics — ultrasonic welding bonds synthetic fabrics, especially where traditional sewing is impractical.
- Films and foils — thin films and foils can be welded with the same technology.
- Packaging materials — the packaging industry uses ultrasonic welding to seal plastic packaging.
The suitability of a material depends on its molecular structure, the thickness of the product, the welding-area dimensions, its thermal properties and the intended application. Some materials are unsuitable because of high melting points, poor acoustic coupling or other technical constraints. Send us your parts and requirements — we will help you find the right material and process window.
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