Gas Sealed UV Dryer For Optimizing UV Applications

Air Liquide has developed a novel inerted UV technology for the curing of coatings using UV irradiations under oxygen-free atmosphere. This technology consists in adapting a Gas Seal Kit to a standard UV-dryer allowing to cure under any desired stable residual oxygen concentration down to 30 ppm using a very moderate flow of nitrogen even at web speed up to 300 rn/mm. It can be easily implemented to existing printing or laminating lines and allows curing speed increase, UV specific power reduction, coating quality improvement and use of coatings in compliance with indirect food contact regulation.