Method of making filtration media having integrally co-located s

Details Method of making filtration media having integrally co-located s Method of making filtration media having integrally co-located s

1996-05-07

1998-07-21

Fortuna, Ana

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

210488, 210506, 156173, 156171, 428297, 425 721, 264DIG75, 2641761, D04H 316, B01D 2400

Patent

active

057830118

ABSTRACT:
Filtration medium is formed of a mass of nonwoven melt blown support and filtration fibers which are integrally co-located with one another. The support fibers have, on average, relatively larger diameters as compared to the filtration fibers which are integrally co-located therewith. Preferably, the filtration medium is disposed within at least one annular zone of a filtration element, for example, a disposable cylindrical filter cartridge having an axially elongate central hollow passageway which is surrounded by the filtration media. A depth filter cartridge in accordance with the present invention may thus be formed having one or more additional filtration zones (which additional filtration zones may or may not respectively be provided with integrally co-located support fibers) in annular relationship to one another. As a result of the melt blown, nonwoven fiber structure in accordance with the present invention whereby at least one filtration zone is comprised of relatively larger diameter support fibers integrally co-located with relatively smaller diameter filtration fibers, a filter cartridge having a wide range of "engineered" physical properties (e.g., in terms of filtration, pressure drop tolerance and the like) can be provided.

REFERENCES:
patent: 4988560 (1991-01-01), Meter et al.
patent: 5141699 (1992-08-01), Meter et al.
patent: 5503782 (1996-04-01), Dryud et al.
patent: 5546836 (1996-08-01), Jeffery et al.

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