New Free Margin Oil Evaporator for Capacitor Film Metallizers (CAP/M)

This paper reports an innovative solution for a masking oil evaporator, Free Margin Evaporator (FME), based on flash evaporation. Particular emphasis is based on oil consumption and free margin quality. The device has been validated by data obtained under experimental and production conditions as a function of total nozzle width (m), metal layer thickness (Ohm/sq) and coating drum speed (m/s). The desired oil thickness on the web has been calculated for different coating processes. Specific advantages of the FME such as process security, oil quality, chamber contamination and cost‐savings using the new free margin evaporator are discussed. Regarding these aspects, the flash evaporator offers advantages to the web coater compared to conventional free margin oil evaporators.