23 Sep New Non-Contact Dryer for Medical/Technical Yarns
NEWS – New Non-Contact Dryer for Medical/Technical Yarns Uses Radio Waves to Dry Aqueous Solutions/impregnations
As an alternative to conventional hot air or infrared dryers, which can cause migration of solids and poor surface qualities, a new Radio Frequency (RF) dryer can remove water at speeds up to 1,000 feet per minute while maintaining superior product feel and performance. Radio Frequency Company’s New Macrowave™ Drying System uses a high frequency electric field to rapidly vaporize water in-situ, such that it exits the product surface as a gas rather than by liquid capillary action, which prevents the migration of solids. In the case of antimicrobial impregnations, the agents remain uniformly distributed throughout the product thickness and surface crusting is eliminated.
This technology is also excellent for drying temperature sensitive materials as process temperatures never exceed the vaporization temperature of water. Further, because the drying area is non-contact, build-up of impregnations or mechanical disruption of the product surface is never an issue.
Utilizing clean electrical energy from the grid, the material to be treated is conveyed through a high frequency electrode array where the alternating electrical energy causes the water molecules to heat rapidly and uniformly throughout the product thickness.
Radio Frequency (RF) heating is a highly efficient, “direct” form of heating such that no energy is wasted heating large volumes of air or preheating the system itself. The technology is “instant-on, instant-off” using energy only during the drying process and requires a fraction of the floor space required by conventional dryers.
Radio Frequency Company offers a full line of systems for the drying of continuous strands/filaments or wound yarn packages. The Company offers sample testing and process development work at their drying laboratory located in Millis, Massachusetts.