SEPARATOR AND SOLID ELECTROLYTIC CAPACITOR USING THE SAME

PROBLEM TO BE SOLVED: To provide a highly reliable capacitor by improving the heat resistance (dimension stability by heating for instance) of a separator and the hygroscopicity of the separator. SOLUTION: The particles of an inorganic substance such as anhydrous aluminum silicate, silicon nitride, zirconia or titanium oxide are mixed only in the sheath portion of core-in-sheath structure fibers such as synthetic fibers or cellulose having a core-in-sheath structure configuring the separator at least for 1.5 wt.% or more to the weight of the separator, and at least one of the mixed core-in-sheath fibers is mixed so as to be at least 30 wt.% to the weight of the separator. For the inorganic substance particles mixed in the sheath part, it is desirable that the average particle size is 0.01-1.0 μm. COPYRIGHT: (C)2010,JPO&INPIT