Liquid purification or separation – Filter – Supported – shaped or superimposed formed mediums
Patent
1985-12-02
1987-05-05
Fisher, Richard V.
Liquid purification or separation
Filter
Supported, shaped or superimposed formed mediums
2104935, 55500, 55502, 55521, B01D 2706
Patent
active
046630414
ABSTRACT:
The present invention provides a filter element made wholly of fluorocarbon resin, including as essential elements a filter material produced by folding a sandwich-form sheet comprising a filter membrane made of a fluorocarbon resin and net supporters made of a thermoplastic fluorocarbon resin superimposed on the both surfaces thereof into a pleat form and liquid-tightly welding the edge parts of the both sides of the pleated sheet, sealed end parts produced by embedding the both end parts of said filter material except the central openings into a thermoplastic fluorocarbon resin to force the resin into the pleats, whereby the both end parts are each integrally and tightly welded, and fluorocarbon resin caps welded liquid-tightly with said sealed end parts, and production thereof. The filter element of the present invention is characterized in that materials for the element are wholly a fluorocarbon resin, so that problems of chemicals resistance, temperature resistance and metal leaching are not caused, and besides that fluorocarbon resins which have so far been regarded as difficult to weld together, are in a liquid-tightly welded state by the special constitution.
REFERENCES:
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patent: 3720323 (1973-03-01), Landree
patent: 3867294 (1975-02-01), Pall et al.
patent: 4033881 (1977-07-01), Pall
patent: 4154688 (1979-05-01), Pall
patent: 4290889 (1981-09-01), Erickson
patent: 4402830 (1983-09-01), Pall
Fujimori Shoichi
Hamada Katushi
Hori Yoshihiro
Inoue Akihisa
Miyagi Tokuya
Fisher Richard V.
Kurashiki Baseki Kabushiki Kaisha
Millard Wanda L.
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