METHOD FOR COATING SUBSTRATE

摘要

PURPOSE: A method for coating a substrate is provided for coating a substrate having a plurality of channels such as a monolithic substrate used in catalytic convertors, with the same thickness of coating for the same length to provide a uniform coating profile. CONSTITUTION: The method is for coating a substrate having the plurality of channels with a coating media. The substrate is partially immersed into a vessel containing a bath of the coating media with the volume of coating media lying above the end of the immersed substrate being sufficient to coat the substrate to a desired level. A vacuum is then applied to the partially immersed substrate at an intensity and time sufficient to draw the coating media upwardly from the bath into each of the channels to form a uniform coating profile therein.