Sealing body, electrolytic capacitor and manufacturing method of sealing body

Abstract

This invention provides a sealing body with improved crack resistance, an electrolytic capacitor including the sealing body, and a method for manufacturing the sealing body. The elastomer included in the sealing body comprises a resin vulcanizing component of 7 wt% or more relative to the total weight of the elastomer, and a high-elasticity component of 27 wt% or more relative to the total weight of the elastomer. The manufacturing of the sealing body includes an elastomer forming step, wherein the elastomer comprises a resin vulcanizing component of 7 wt% or more relative to the total weight of the elastomer, and a high-elasticity component of 27 wt% or more relative to the total weight of the elastomer. The electrolytic capacitor includes a capacitor element having an anode, a cathode, and an electrolyte, and the capacitor element is housed in an outer casing in which an opening is sealed by the sealing body.

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