Nonwoven filter material

Details Nonwoven filter material Nonwoven filter material

B - Operations, Transporting

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B01D 39/16 (2006.01) A47L 9/14 (2006.01) B01D 39/08 (2006.01) B03C 3/28 (2006.01) B32B 5/26 (2006.01) C08F 110/02 (2006.01) D04H 1/54 (2006.01) D04H 13/00 (2006.01)

Patent

CA 2004048

Improved microfibrous filtration laminate comprising a highly permeable layer of a self-supporting nonwoven fabric which provides support for a layer of a randomly intertangled nonwoven mat of electret-containing microfibers of synthetic polymer is disclosed. The filtration laminate, which is particularly useful as disposable filter bags or as a lining material for disposable paper filter bags for vacuum cleaners, is characterized by thickness and handling characteristics approaching that of paper filter material typically used in disposable vacuum cleaner bags but having improved performance in the areas of an immediate, high particle capture efficiency, minimal flow restriction and long service life.

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