| 摘要 |
PROBLEM TO BE SOLVED: To provide an electrolytic capacitor in which short circuit failure rate is improved without having an adverse effect on the impedance characteristics by employing a novel electrolytic sheet having low density and tensile strength enhanced sharply without covering the air gap between fibers, and productivity is enhanced. SOLUTION: In the electrolytic capacitor where an electrolytic sheet is interposed between an anode foil and a cathode foil, the electrolytic sheet is made of unbeaten or slightly beaten natural vegetable fibers by a cylinder machine. It is then impregnated, under dry sheet state, with refining solution of paper force reinforcement agent from which impurities are removed thus obtaining an electrolytic capacitor having a density of 0.20-0.70 g/cm<SP>3</SP>, tensile strength of 1.1 kg/15 mm or above, and a thickness of 20-70μm where the impurity of the electrolytic sheet is 500-650 V when it is evaluated by chemical treatment properties, and ESR is 0.2Ω/1 kHz or less. COPYRIGHT: (C)2006,JPO&NCIPI
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