Filter element having microporous membrane

Details Filter element having microporous membrane Filter element having microporous membrane

1989-04-17

1990-03-06

Fisher, Richard V.

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, 21050021, B01D 1300

Patent

active

049063715

ABSTRACT:
A filter element containing a hydrophilic nylon microporous filter membrane having a preformed substantially non-porous sealing area of non-porous tape heat sealed to the membrane 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 pleated cylindrical membrane is produced from an elongated porous filtration area longitudinally bordered by the substantially non-porous sealing areas. Such a membrane may be produced by applying a heat sealable non-porous tape 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: 3415384 (1968-12-01), Kasten
patent: 3526588 (1970-09-01), Michaels
patent: 4154688 (1979-05-01), Pall
patent: 4305782 (1981-12-01), Ostreicher et al.

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