Patent ID: 6273938
Filing Date: 2001-08-14
Classification: B01D,Y10S

Abstract:
A method of using a filtration medium having high efficiency and a low pressure drop to reduce vapor concentration levels in an area, the method comprising the steps of:providing a filtration medium having a plurality of filtration layers formed from non-woven filter material including multi-layer fiber strands that have a polymer core and at least one outer layer of adhesive material to which sorbent particulate matter is adhered, wherein at least one filtration layer has a multi-dimensional channel pattern formed therein creating a plurality of continuous, tortuous channels across the at least one layer and a multi-dimensional edge at each end of the plurality of channels, the plurality of filtration layers configured as a stack with the channel pattern of the at least one layer defining a plurality of inlets open through a first face of the stack, a corresponding plurality of disruptive fluid pathways through the stack, and a plurality of outlets open through a second face of the stack; andplacing the filtration medium in the area where vapor concentration levels are to be reduced.