Treating hydrophobic filters to render them hydrophilic
First Claim
1. 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.
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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° to 200° F.) as a drying assist which renders the membrane to have a substantially instantaneous "wet-out".
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Citations
6 Claims
- 1. 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.
- 4. 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.
Specification