MEMBRANE,E.G FOR USE IN AN ILEOSTOMY BAG,申请号GB19900018411-传众专利搜索

MEMBRANE,E.G FOR USE IN AN ILEOSTOMY BAG

申请公布号：GB2247192(A)

申请号：GB19900018411

申请日期：1990.08.22

申请公布日期：1992.02.26

申请人：

* E.R. SQUIBB & SONS, INC

发明人：GRAHAM EMERY * STEER

分类号：A61L26/00;A61F5/441;A61F13/15;B01D19/00;B01D69/10;B01D71/26;B01D71/54

主分类号：A61L26/00

摘要：<p>A method of making a gas-permeable liquid-impermeable membrane includes the steps of perforating a film (10) of linear low density polyethylene (or other suitable polyolefin) in such a way as to yield an array of holes (12) each having an average diameter of approximately 350 mu (microns), and then solution coating the needled film with a porous polyurethane material (14) having pores of a pore size of 1 to 10 mu . Such a film is advantageously embodied in an ileostomy bag, and is fixed to a bag wall thereof in a location to prevent faecal material contacting the bag filter, by a heat or RF welding operation by which the polyolefin is welded to the bag wall which carries the filter. In use, the polyurethane is exposed to the bag contents, and permits gases to pass but prevents any liquid reaching the filter. <IMAGE></p>