Radio frequency drying system selectively heats only the patterned coatings (wetted sections) applied to the web, leaving the bound moisture in the substrate intact. Designed for high-speed drying of water-based patterned glue and coatings in the converting and textile industries, the web dryer does not overdry, distort and shrink the product, says Radio Frequency Co. Inc., Millis, Mass.

Benefits of using radio frequency for web drying include line speeds of up to 2,000 ft/min and asmaller equipment footprint.  The radio frequency heating method also permits lower web temperatures.