Presented by Mark Miller | Coating Tech Slot Dies, LLC
Slot die coating was developed as the need for a better and more efficient coating method was required. This process has been successful in replacing other coating methods in applying many types of solutions. A slot coating die is a device that is capable of holding a fluid’s temperature, distributing a fluid uniformly and defining a coating width. The die is comprised of steel body sections that house the fluid flow chamber. The fluid delivery system to the slot die has to provide a non-pulsing, constant feed of fluid. This critical piece of equipment works in combination with an accurate line speed control to determine coat weight of the fluid. In slot die coating, the fluid is pre-metered. This means that all the fluid provided to the coating head is placed on the substrate. Excess fluid is not a consideration like in roll coating. Therefore, the feed method is critical. There are two methods – volumetrically controlled and pressure controlled fluid delivery systems. This presentation will provide the details to consider in the solution feed system for slot die coating technology.