The Welding Process

Welding Machine Manufactures

Hot Air Welding

Air heated to over 400° F is directed through a nozzle precisely into the space between the fabrics to be joined. The heated surfaces are then pressed together by a roller which follows the nozzle.

Hot Air Equipment Suppliers:

Production-Scale Machines:
Miller Weldmaster

Smaller Shop Tools:
Forsthoff  (Abbeon Cal)

Weldable Webbing by Louis A. Green combined with Extreme Seam Machines for PVC Bonding by Miller Weldmaster

Weldable Webbingby Louis A. Green Corp. combined with Extreme Seam Machines for PVC Bonding by Miller Weldmaster.

Electronic Welding

Thermoplastic vinyl molecules are excited (heated) by radio frequency waves or electronic pulses. The materials are pressed together between a sealing bar and a bed plate.

High Frequency Equipment Suppliers:
Hall Dielectric
JTE Machine Systems

Impulse Welding
Miller Weldmaster

Wedge Welding

Fabrics pass between spaces above and below a heated metal wedge as it is moved along the materials to be joined. The resulting heated materials are then pressed together by a trailing roller.

Wedge Equipment Suppliers:

Miller Weldmaster


The Welding Process

The “V” in PVC is for Vinyl.  PVC (polyvinyl chloride) is a versatile polymeric plastic that is strong, flexible, and weather resistant, and it has an attractive finish for fabrics used in signs, banners, tents, transportation, and many other applications. PVC is a “thermoplastic” which means that it is highly suitable for welding.

Welding equipment enables fast strong and weather-tight joining of PVC fabrics, including using Weldable Webbing in overlapped seams. In these cases, one sheet of vinyl-coated fabric is being welded to another piece of the same type of fabric. (PVC-Coated Weldable Webbing can also be stitched, or for light-weight signs and banners, it can be applied using double-sided banner tape or PVC solvent adhesive.)