Fluid-impermeable areas on porous membrane filters and their application
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United States of America Patent
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Nov 13, 1990
Grant Date -
N/A
app pub date -
Jan 31, 1989
filing date -
Feb 4, 1988
priority date (Note) -
Expired
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Abstract
The invention relates to porous membrane filters, specifically mirco- and ultraporous membrane filters, which have fluid-impermeable areas as a result of a change of their structure on one side of the membrane to a film-like state (film-formation). These filters are, for example, very suitable for an assembly in filter cartridges according to the pouring method, because they still have on the side opposite to the filmed-up side a porous structure, which offers an ideal anchoring possibility for penetrating liquid resin.
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