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MICROPOROUS MODIFIED-POLYTETRAFLUOROETHYLENE MEMBRANE, POROUS-MODIFIED-POLYTETRAFLUOROETHYLENE-MEMBRANE COMPOSITE AND PRODUCTION PROCESS THEREOF, AND SEPARATION MEMBRANE ELEMENT
MICROPOROUS MODIFIED-POLYTETRAFLUOROETHYLENE MEMBRANE, POROUS-MODIFIED-POLYTETRAFLUOROETHYLENE-MEMBRANE COMPOSITE AND PRODUCTION PROCESS THEREOF, AND SEPARATION MEMBRANE ELEMENT
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机译：微孔改性-聚四氟乙烯膜，多孔改性-聚四氟乙烯-膜复合材料及其生产工艺和分离膜元件
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摘要
PROBLEM TO BE SOLVED: To provide a microporous modified polytetrafluoroethylene film, which has pores having extremely small diameters with a narrow pore size distribution, and which is capable of removing fine foreign materials with high efficiency in cases where the film is used as a filtration membrane.;SOLUTION: This microporous modified polytetrafluoroethylene film is produced by molding a copolymer of hexafluoropropylene or perfluoroalkyl ether and tetrafluoroethylene in an amount of not less than 50 times the molar amount of the hexafluoropropylene or perfluoroalkyl ether into a film form, heating and sintering the thus-formed film at a temperature not lower than the melting point of the copolymer, and then cooling and stretching the thus-obtained sintered body, and which has a mean flow pore diameter of 30 nm or less. The porous modified polytetrafluoroethylene resin film composite having this microporous film; a method for producing the same; and a separation membrane element which uses the porous modified polytetrafluoroethylene resin film composite are disclosed.;COPYRIGHT: (C)2013,JPO&INPIT
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