SUBLIMATION OF SOLID ORGANIC COMPOUNDS ONTO SUBSTRATE SURFACES IN THE PRESENCE OF A FLUID IMPREGNANT

摘要

An approach for beneficially incorporating both a solid organic impregnant a nd 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 a dd the solid organic and fluid materials.