Oil, water and sweat repellent microporous membrane materials

Details Oil, water and sweat repellent microporous membrane materials Oil, water and sweat repellent microporous membrane materials

B - Operations, Transporting

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B01D 71/26 (2006.01) A41D 31/00 (2006.01) A41D 31/02 (2006.01) A61L 15/42 (2006.01) B01D 67/00 (2006.01) B29C 55/00 (2006.01) B32B 27/06 (2006.01)

Patent

CA 2119138

2119138 9308019 PCTABS00021 The invention discloses an oleophobic, hydrophobic, water repellent, moisture vapor and air permeable, heat sealable, microporous membrane material suitable for garment applications. The membrane material comprises a polyolefin polymer, a processing compound which is miscible with the polymer at its melt temperature but phase separates when the polymer is cooled to or below its melt temperature, and a fluorochemical composition. The membrane material is oriented in at least one direction. The membrane materials retain their repellency and moisture vapor permeable properties for extended periods of time in garment applications which expose the membrane materials to perspiration residues which are known to generally contaminate and ultimately destroy the repellency properties of conventional liquid repellent, moisture vapor permeable treatments.

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