CAPACITOR SEPARATOR AND CAPACITOR
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United States of America Patent
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Jun 16, 2016
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Dec 19, 2013
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A separator for a capacitor includes a porous film made of cellulose dissolved and regenerated without forming a cellulose derivative (A) and a fibrous component (B). The separator has excellent impedance characteristics and short-circuit resistance characteristics. The regenerated cellulose (A) can be obtained by forming in a film form a cellulose solution made by dissolving cellulose in an amine oxide solvent, immersing the resulting cellulose solution in water or a poor solvent of the amine oxide solvent so as to coagulate and regenerate the cellulose, washing the regenerated cellulose with water to remove the amine oxide solvent, and drying the resulting cellulose. Moreover, the fibrous component (B) can be one or more kinds of fibers selected from among a plant-based pulp, regenerated cellulose fiber, cellulose fiber, animal fiber, inorganic fiber, and synthetic fiber that are available as paper raw material.
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