Patent ID: 8343251
Filing Date: 2013-01-01
Classification: B01D,B32B

Abstract:
1. A composite air filter media comprising, in combination: a. at least one layer of gas-permeable supportive material formed from a plurality of bonded fibers, the supportive layer having an upstream surface and a downstream surface; b. a layer of netting formed of low surface free energy material bonded to the upstream surface of said at least one layer of gas-permeable supportive material, thereby forming a particulate-releasing surface for receiving particulate matter initially impacting the composite air filter media and subsequently releasing at least a significant portion of the particulate matter from the composite air filter media, wherein the thickness of the netting is in a range of about 75 micrometers to about 250 micrometers; and c. at least one layer of gas-permeable filtration material formed from a plurality of bonded fibers, the filtration layer bonded to the downstream surface of said at least one layer of supportive material.