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MEMBRANE, E.G. FOR USE IN AN ILEOSTOMY BAG
MEMBRANE, E.G. FOR USE IN AN ILEOSTOMY BAG
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机译:膜,例如用于回肠造袋术
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摘要
A method of making a gas-permeable liquid-impermeable membrane includes the steps of perforating a film of linear low density polyethylene (or other suitable polyolefin) in such a way as to yield an array of holes each having an average diameter of approximately 350 , and then solution coating the needle d film with a porous polyurethane material having pores of a pore size of 1 to . Such a film is advantageously embodied in an ileostomy bag, and is fixe d to a bag wall thereof in a location to prevent faecal material contacting th e ~ bag filter, by a heat or RF wedding operation by which the polyolefin is welded to the bag wall which carries the filter. In use, the polyurethane is expose d to the bag contents, and permits gases to pass but prevents any liquid reaching the filter.
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