Treating hydrophobic filters to render them hydrophilic
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United States of America Patent
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Jun 25, 1985
Grant Date -
N/A
app pub date -
Feb 27, 1984
filing date -
Feb 27, 1984
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method is described for coating a hydrophobic filter membrane so as to render said membrane hydrophilic. This method is particularly for treating polypropylene or polytetrafluoroethylene in which the filter membrane is contemplated to have a pore size not larger than two (2) microns. The treating solution has Triethanolamine Dodecylbenzene Sulfonate (LAS) as the active ingredient. This treatment may use heated air (125.degree. to 200.degree. F.) as a drying assist which renders the membrane to have a substantially instantaneous 'wet-out'.
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