Filtration media having a slit-film layer

Details Filtration media having a slit-film layer Filtration media having a slit-film layer

2011-07-19

2011-07-19

Greene, Jason M (Department: 1775)

Gas separation

Flexible or collapsible bag type

Seaming, reinforcing or bag structure

C055S486000, C055S522000, C055S527000, C055S528000, C055S487000, C055SDIG020, C055SDIG030, C055SDIG039, C095S015000, C095S066000, C095S068000, C095S069000, C096S070000

Reexamination Certificate

active

07981177

ABSTRACT:
A composite filter media for a vacuum cleaner comprising a first filtration layer comprising a slit film having a plurality of continuous electrostatically-charged polyolefin filaments disposed substantially parallel to each other along their lengths; and a second filtration layer comprising a high-efficiency filtration media selected from wet-laid filter paper, dry-laid filter paper, and nonwoven filter media; wherein said first filtration layer is disposed in series with said second filtration layer, with respect to an air flow direction through said vacuum cleaner, to form a composite.

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