Curtain coating

Curtain coating is a process that creates an uninterrupted curtain of fluid that falls onto a substrate . The substrate is transported on a conveyor belt or calender rolls at a regulated speed through the curtain to ensure an even coat of the die. The curtain is created by using a slit or die at the base of the holding tank, allowing the liquid to fall upon the substrate. Some polymers are melted and extruded for coating. Many manufactures will also include a catch pan to retrieve and reuse the excess fluid. Curtain coating is a process that creates an uninterrupted curtain of fluid that falls onto a substrate . The substrate is transported on a conveyor belt or calender rolls at a regulated speed through the curtain to ensure an even coat of the die. The curtain is created by using a slit or die at the base of the holding tank, allowing the liquid to fall upon the substrate. Some polymers are melted and extruded for coating. Many manufactures will also include a catch pan to retrieve and reuse the excess fluid.