Treating hydrophobic filters to render them hydrophilic
AssigneeManresa, Inc.
InventorVincent L. Vaillancourt
Life of this patent
Estimating the term…
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".
Claims6
A method of coating a hydrophilic filter membrane to render said membrane hydrophilic, said method including the steps of coating a polypropylene membrane whose pore size is not larger than two (2) microns with a Triethanolamine Dodecylbenzene Sulfonate (LAS) chemical solution so that said polypropylene membrane is rendered hydrophilic and medically acceptable.
A method of coating a hydrophobic filter membrane to render said membrane hydrophilic, said method including the steps of coating a polytetrafluoroethylene membrane whose pore size is not larger than two (2) microns with a Triethanolamine Dodecylbenzene Sulfonate (LAS) chemical solution so that said polytetrafluoroethylene membrane is rendered hydrophilic and medically acceptable.
Dependencies are inferred from the claim text.