Patent ID: 6589317
Filing Date: 2003-07-08
Classification: B03C,Y10S

Abstract:
An electrostaticly charged filtration media comprising:a plurality of polymeric structured polymeric film layers having a first and a second major surface, at least the first major surface of the structured film layers comprising a structured surface which structures on the structured surface form, at least in part, flow channels the top of which flow channels are formed by an adjacent coplanar film layer, the plurality of structured film layers configured as a stack, the stack having a first and second face with the flow channels formed by the structured surfaces defining a plurality of ordered inlets, the inlets opening through the first face of the stack, that are in fluid communication with ordered fluid pathways, each fluid pathway defined at least in part by at least one discrete flow channel such that fluid can flow substantially unimpeded from the inlet of the fluid pathway to an outlet, the outlet opening through the second face of the stack, wherein each layer of fluid pathways is defined by two opposing charged film layers, at least one of which is a structured film layer wherein the flow channels have an height of from 0.1 mm to 5 mm and an average width of from 0.05 mm to 50 mm and an average width to height aspect ratio of from 0.5 to 10.