Plastic and nonmetallic article shaping or treating: processes – Pore forming in situ
Patent
1985-02-12
1986-04-01
Anderson, Philip
Plastic and nonmetallic article shaping or treating: processes
Pore forming in situ
2104332, 264 451, 264 455, 264255, 264286, 264322, 264DIG48, C08J 928, B29C 6720
Patent
active
045796980
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: 3457339 (1979-07-01), Pall et al.
patent: 3865919 (1975-02-01), Pall et al.
patent: 3873254 (1975-03-01), Warwicker
patent: 3876738 (1975-04-01), Marinaccio et al.
patent: 4392958 (1983-07-01), Ganzi et al.
Meyering Mark T.
Ostreicher Eugene A.
AMF Inc.
Anderson Philip
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