초록 ▼

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, th

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.

대표청구항 ▼

A filter cartridge having an axially elongate central hollow passageway, and a cylindrical filtration element surrounding said passageway which includes a mass of nonwoven melt blown continuous support and filtration fibers, said support fibers having on average relatively larger diameters as compar

A filter cartridge having an axially elongate central hollow passageway, and a cylindrical filtration element surrounding said passageway which includes a mass of nonwoven melt blown continuous support and filtration fibers, said support fibers having on average relatively larger diameters as compared to said filtration fibers, wherein said relatively larger diameter support fibers define a random matrix of open areas in at least one annular zone of said filtration element, and wherein said filtration fibers are integrally co-located with said relatively larger diameter support fibers within said at least one annular zone of said filtration element so as to be disposed physically within said random matrix of open areas defined by said support fibers.