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Title:
SEPARATOR FOR ALUMINUM ELECTROLYTIC CAPACITORS, AND ALUMINUM ELECTROLYTIC CAPACITOR USING SAID SEPARATOR
Document Type and Number:
WIPO Patent Application WO/2019/188660
Kind Code:
A1
Abstract:
A separator according to the present invention is composed only of non-fibrillated fibers; and this separator contains 20-60% by mass of polyester main body fibers and 10-70% by mass of polyester binder fibers as the non-fibrillated fibers, while containing 10-30% by mass of a polyvinyl alcohol as a binder material. Consequently, the average pore diameter of the separator is able to be controlled to 5.0-20.0 μm, the frequency of pore diameters within the range of 5.0-15.0 μm is able to be controlled to 70% or more of all pore diameters, and the frequency of pore diameters of 20 μm or more is able to be controlled to 10% or less, thereby enabling the separator to have high uniformity. In addition, by using this separator in a solid electrolytic capacitor or in a hybrid electrolytic capacitor, the present invention is able to provide an aluminum electrolytic capacitor which has improved capacitance characteristics by enhancing the impregnation ability of a polymerization liquid or dispersion liquid of a conductive polymer, while achieving the reduction of the short circuit failure ratio.

Inventors:
OCHI TAKAFUMI (JP)
ISHIGAYASUMI MASAKI (JP)
KUMAOKA HIRONORI (JP)
Application Number:
PCT/JP2019/011700
Publication Date:
October 03, 2019
Filing Date:
March 20, 2019
Export Citation:
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Assignee:
NIPPON KODOSHI CORP (JP)
International Classes:
H01G9/02; H01G9/145; H01G9/15
Foreign References:
JP2016173956A2016-09-29
JP2010192573A2010-09-02
JP2005054348A2005-03-03
US20140193716A12014-07-10
Attorney, Agent or Firm:
MARUYAMA Yukio (JP)
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