| US 7,584,860 B2 | ||
| Hydrophilic body and method of manufacture | ||
| Karmin Lorraine Olson, Kansas City, Mo. (US) | ||
| Assigned to General Electric Company, Schenectady, N.Y. (US) | ||
| Filed on Jul. 17, 2006, as Appl. No. 11/457,871. | ||
| Prior Publication US 2008/0011676 A1, Jan. 17, 2008 | ||
| This patent is subject to a terminal disclaimer. | ||
| Int. Cl. B01D 9/46 (2006.01); B01D 71/26 (2006.01); A61B 5/103 (2006.01) | ||
| U.S. Cl. 210—490 [210/500.36; 210/500.27; 427/244] | 15 Claims |
| 1. A hydrophilic body consisting essentially of:
a porous membrane having hydrophobic properties and comprising expanded polytetrafluoroethylene, woven polytetrafluoroethylene,
or non woven polytetrafluoroethylene, said expanded polytetrafluoroethylene comprising a plurality of nodes interconnected
by a plurality of fibrils, each said node and said fibril having an outer surface, said woven polytetrafluoroethylene and
said non-woven polytetrafluoroethylene comprising a plurality of polytetrafluoroethylene fibers, each said polytetrafluoroethylene
fiber having an outer surface, said porous membrane having a plurality of pores; and
a coating formed from a coating composition deposited on at least a portion of said surfaces of said nodes and fibrils, or
said surfaces of said polytetrafluoroethylene fibers of said woven polytetrafluoroethane, or said surfaces of said polytetrafluoroethylene
fibers of said non-woven polytetrafluoroethane without blocking said pores of said porous membrane, said coating having hydrophilic
properties and comprising at least one of an organofunctional siloxane and a polyether urethane polymer,
said hydrophilic body having a water permeability of between about 10 and about 40 milliliters per minute per square centimeter
at about 27 inches of mercury vacuum, and
said hydrophilic body retains water wettability and can be dried and subsequently flow liquid without pre-wetting.
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