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US 8,282,713 B2Granted
PTFE pleated filter element
AssigneeBHA Group, Inc.
InventorsAlan Smithies, Karmin Lorraine Olson
Life of this patent
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Abstract
A filter media including a scrim, a polytetrafluoroethylene (PTFE) media substrate upon the scrim, and a layer of expanded polytetrafluoroethylene (ePTFE) membrane adhered to the PTFE media substrate on the scrim. The filter media is pleatable and has air permeability of approximately 3-10 cubic feet/min at a 0.5 inch H2O pressure drop and an original filtration efficiency greater than 99.0% when tested in an unused, unpleated condition with a 0.3 micron challenge aerosol at a flow rate of 10.5 feet/min and when tested after a cleanable dust performance test according to ASTM D6830.
Claims8
A filter media including:
- a scrim;
- a polytetrafluoroethylene (PTFE) media substrate upon the scrim;
- and
- a layer of expanded polytetrafluoroethylene (ePTFE) membrane adhered to the PTFE media substrate on the scrim;
- the filter media is pleated to have a plurality of pleats and has air permeability of approximately 3-10 cubic feet/min at a 0.5 inch H2O pressure drop and an original filtration efficiency greater than 99.0% when tested in an unused, unpleated condition with a 0.3 micron challenge aerosol at a flow rate of 10.5 feet/min and when tested after a cleanable dust performance test according to ASTM D6830 in an unused, unpleated condition.
2 more elements
Dependencies are inferred from the claim text.