Top Quality High Frequency Welding Machine By Davison-machinery >>> Manufacturers in many industries are actively looking to replace PVC materials with less toxic plastics. This, in turn, is driving the development of new plastic technologies and techniques and increasing the number of non-PVC options suitable for RF welding.

RF welding can be applied to any flexible thermoplastic material containing dipole molecules.
The layers of materials being welded can be similar or can combine different plastics, depending on the application. During the welding process, high frequency electromagnetic energy causes the polar molecules in each layer to oscillate rapidly and align to the electromagnetic field within the welding bars. The resulting heat allows the layers of materials to melt and fuse together, forming a strong seal.

The list of RF-sensitive plastics includes a number of versatile alternatives that offer less toxic, more environmentally friendly profiles compared to PVC. Ideally, any thermoplastic material substituted for PVC should also be easily recyclable. If not recyclable, it is important to understand its environmental impact if incineration is required (such as medical waste).

Thermoplastic urethanes (TPU). TPU is increasingly used in the medical field as a substitute for PVC because it is manufacturered without plasticizers (phthalates) or other toxic chemical treatments.
Polyamides. This term includes a variety of materials, including nylon as well as naturally occurring materials such as wool and silk. Its health and environmental profile depends on the specific type of nylon material and related by products generated during manufacturing.
Polyethylene teraphthalate (PET). PET has been well studied for human safety and is used to manufacture water bottles and food containers. It is also easily recyclable. A wide variety of products are made from recycled PET.
Acrylonitrile butadiene styrene (ABS). ABS is a plastic resin that has been shown to be stable and non-leaching, and does not contain plasticizers. It also recyclable. Several grades of ABS are suitable for RF welding.
Ethyl vinyl acetate (EVA). EVA is a highly elastic material that is considered safe by the Food and Drug Administration for applications including food production, packaging, toys, and transportation. It does not contain plasticizers.

It is also possible to weld materials that do not contain dipole molecules, such as polypropylene and polyethylene. By combining PE with a dipole material such as EVA, for example, the resulting material is rendered RF sensitive.

The experts at davison-machinery.com are happy to provide more information on PVC alternatives that combine safer chemical profiles with high quality performance, and to help you select the right plastic for your project.