Pourous fluorocarbon membrane, method for producing thereof and cartridge filter based on said membrane
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United States of America Patent
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Nov 23, 1999
Grant Date -
N/A
app pub date -
Jun 20, 1997
filing date -
Oct 23, 1995
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A porous fluorocarbon membrane has a porous support completely impregnated with tetrafluoroethylene/vinylidene fluoride copolymer. There is a process for producing this membrane by impregnating a porous support with a copolymer solution in a readily-boiling solvent and a precipitating mixture of alcohol and water followed by curing for partial hardening of the solution and subsequent drying at elevated temperature. A cartridge filter includes protective and supporting cylindrical perforated hollow housings, containing a fluorocarbon membrane or two superimposed flourocarbon membranes. Membranes and a cartridge filter find extensive use in separation of gases and aggressive media.
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