Pleatable PTFE filter media with ePTFE membrane
US8333826B2 · kind B2 · utility
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8Claims
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Key dates
| Filing date | Feb 10, 2010 |
| Grant date | Dec 18, 2012 |
| Priority date | — |
| Expiry date | Jan 23, 2031 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2239/0654
- WIPO fieldChemical engineering
- WIPO sectorChemistry
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.