RF Welding Versus Hot Air Welding

Choosing the right thermoplastic materials joining method is as important as choosing the right base materials. You design your products for the right strength and your sealing needs to meet those design standards. At MarkPeri, we are an industry leader in thermoplastic joining and offer our customers many different processes to cover all materials types and sealing needs.

Two of our most popular hot joining methods are RF (radio frequency) welding and hot air welding. The differences in these welding processes and the resultant seal make them suitable for different applications.

RF Welding

An RF-welded joint is suitable for a variety of thermoplastic materials, including PVC vinyl, polyurethane, coated and laminated vinyls and many others. This advanced welding technique is used for many common products, including:

  • Industrial vinyl curtains and welding screens
  • Plasma bags for medical applications
  • Blister packs for packing and transportation
  • Vinyl covers for binders and document sleeves
  • Automotive and military fluid hoses

Thanks to their airtight and watertight seal, RF-welded products are suitable to hold a variety of products. One of the greatest advantages of RF welding is that the seal is actually stronger than the parent materials themselves. That is thanks to the melting and fusing of the two materials along the seam.

Under normal use, your product will not fail along the seam, but instead in the material itself. This allows you to design your products without concern of premature failure along your sealed joint.

Hot Air Welding

In the case of our hot air welding process, the heat necessary to melt the surface of the mating materials is generated by heating air. In many manual processes, the heating is done with a tool that’s similar to a hair dryer. The heated air is directed to the material surface just as it passes between a roller, press or clamp, so the materials are held in tight contact for fusing and cooling.

The result is an airtight and watertight seal that will be as strong, if not stronger, than the material itself. We can hot air weld a variety of thermoplastics for common products, such as:

  • Tarpaulins and large paneled products
  • Sealed air hoses
  • Fluid-containment bags
  • Industrial fluid overflow bags

With no dies or special tooling required, hot air welding is suitable for large, continuous seams that include complicated shapes, curves and angles.

For help choosing the perfect welding method for your thermoplastics, contact our team here at MarkPeri today and we’ll help you choose between RF welding, hot air welding or one of our other flexible and consistent joining processes.