Patent ID: 7985275
Filing Date: 2011-07-26
Classification: B01D,Y10S

Abstract:
1. A filter medium for use in a high temperature filtering operation comprising, a nonwoven fabric substrate having a pleated physical structure and comprising a plurality of polymeric fibers, wherein at least a portion of the plurality of polymeric fibers comprise a base polymer and at least a portion of the plurality of polymeric fibers comprise a secondary polymer, and wherein at least a portion of the polymeric fibers are bonded together by a polymer portion selected from the group consisting of the base polymer, the secondary polymer, and combinations thereof, the nonwoven fabric substrate being capable of retaining the pleated physical structure during filtering operations at a filtering temperature up to about 200° C., and wherein the nonwoven fabric substrate has a density greater than 0.35 grams per cubic centimeter and is devoid of a stiffening resin.