Filter element having microporous membrane

Details Filter element having microporous membrane Filter element having microporous membrane

1989-04-17

1990-05-29

Hruskoci, Peter

Liquid purification or separation

Casing divided by membrane into sections having inlet

Membrane secured with adhesive of specified composition

21032186, 21032187, 210485, 210489, 2104932, 21049701, 21050038, B01D 1300

Patent

active

049293540

ABSTRACT:
A filter element comprising a hydrophilic organic polymeric microporous filter membrane having a preformed substantially non-porous sealing area and a filter housing having, preferably, a hydrophobic thermoplastic sealing surface in thermoplastic sealing relationship with the sealing area. Preferably, the filter membrane is a pleated cylindrical membrane and the housing includes endcaps thereto. The preferred membrane is nylon. The preferred pleated cylindrical membrane is produced from an elongated porous filtration area longitudinally bordered by substantially non-porous sealing areas. Such a membrane may be produced by a specific casting method or collapsing the pores along the longitudinal borders of the filtration area. The filter element is particularly useful for the filtration of aqueous liquids, particularly parenteral or body liquids.

REFERENCES:
patent: 3238056 (1966-03-01), Pall et al.
patent: 3246767 (1966-04-01), Pall et al.
patent: 3415384 (1968-12-01), Kasten
patent: 4154688 (1979-05-01), Pall
patent: 4392958 (1983-07-01), Ganzi et al.
patent: 4402830 (1983-09-01), Pall
patent: 4473474 (1984-09-01), Ostreicher
patent: 4512992 (1985-04-01), Garzi et al.

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