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    • 2. 发明专利
    • Separator material and a method of manufacturing the same
    • JP4367923B2
    • 2009-11-18
    • JP2004123214
    • 2004-04-19
    • ダイワボウホールディングス株式会社ダイワボウポリテック株式会社
    • 利夫 上笹博之 山本仁志 立野
    • H01G9/02H01M2/16H01G9/00
    • Y02E60/13
    • PROBLEM TO BE SOLVED: To provide a separator material in which a nonwoven fabric is homogeneously hydrophilized up to the surface of fibers existing inside the nonwoven fabric by treating the nonwoven fabric including extra-fine fibers by batch type multistage treatment wherein the nonwoven fabric is reacted with a sulfurous acid containing gas under reduced pressure, then reacted with a fluorine containing gas in a state that the sulfurous acid containing gas still remains. SOLUTION: This separator material is composed of the nonwoven fabric including the extra-fine fibers with a fiber diameter of 4 μm or less, in which the ratio (F/C) of the number of fluorine atoms (F) with respect to that of carbon atoms (C) which is measured by using an electron spectroscopy for a chemical analysis (ESCA) at an X-ray take out angle of 45° is within a range of 1×10 -2 or more and 20×10 -2 or less, wherein that (1) the ratio (S/C) E of the number of sulfur atoms (S) with respect to that of the carbon atoms (C) measured by using ESCA at an X-ray take out angle of 45 degrees is 1×10 -2 or more and 10×10 -2 or less, (2) the ratio (S/C) B of the numbers of the sulfur atoms (S) with respect to that of the carbon atoms (C) measured by a flask combustion method is within a range of 0.1×10 -3 or more and 0.5×10 -3 or less, and (3) the ratio [(S/C) E /(S/C) B ] of the (S/C) E with respect to the (S/C) B is within a range of 100 or more and 250 or less is satisfied. COPYRIGHT: (C)2006,JPO&NCIPI