Sublimation of solid organic compounds onto substrate surfaces in the presence of a fluid impregnant

Abstract From the Canadian patent

An approach for beneficially incorporating both a solid organic impregnant and a fluid impregnant into filter media particles without the presence or addition of one unduly affecting the performance of the other. The present invention achieves impregnation by combining sublimation and non-bulk absorption techniques. These techniques may be carried out in sequential simultaneous, overlapping, and/or alternating fashion or the like. The , invention is especially suitable when the filter media particles already contain or are to contain one or more other impregnants whose function or , presence might be adversely affected when conventional methods are used to add the solid organic and …