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Separator for aluminum electrolytic capacitor and aluminum electrolytic capacitor using same

A technology for aluminum electrolytic capacitors and diaphragms, which is applied in the field of diaphragms for aluminum electrolytic capacitors and aluminum electrolytic capacitors. It can solve the problems of increased man-hours for carbonization treatment, complicated steps, and reduced strength of the diaphragm, so as to reduce the short-circuit failure rate and improve short-circuit resistance. , The effect of improving the capacitance characteristics

Active Publication Date: 2022-04-15
NIPPON KODOSHI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] However, due to the carbonization treatment, man-hours increase and the steps become complicated
In addition, the carbonization treatment causes thermal decomposition of cellulose, so the physical strength of the separator is also reduced.

Method used

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  • Separator for aluminum electrolytic capacitor and aluminum electrolytic capacitor using same
  • Separator for aluminum electrolytic capacitor and aluminum electrolytic capacitor using same
  • Separator for aluminum electrolytic capacitor and aluminum electrolytic capacitor using same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0109] The separator of Example 1 was obtained by cylinder paper-making using the raw material which mixed 60 mass % of polyester main fibers, 10 mass % of polyester binder fibers, and 30 mass % of polyvinyl alcohol.

[0110] The completed membrane of Example 1 has a thickness of 60 μm and a density of 0.20 g / cm 3 , the average pore diameter is 20.0 μm, the frequency of 5.0-15.0 μm pore diameter is 72%, and the frequency of pore diameter above 20.0 μm is 7%.

Embodiment 2

[0112] A separator of Example 2 was obtained by cylinder papermaking using a raw material in which 20% by mass of polyester main fibers, 70% by mass of polyester binder fibers, and 10% by mass of polyvinyl alcohol were mixed.

[0113] The thickness of the diaphragm of the completed embodiment 2 is 70 μm, and the density is 0.50 g / cm 3 , the average pore diameter is 5.0 μm, the frequency of pore diameters from 5.0 to 15.0 μm is 77%, and the frequency of pores above 20.0 μm is 4%.

Embodiment 3

[0115] A separator of Example 3 was obtained by cylinder papermaking using a raw material in which 50% by mass of polyester main fibers, 30% by mass of polyester binder fibers, and 20% by mass of polyvinyl alcohol were mixed.

[0116] The thickness of the diaphragm of the completed embodiment 3 is 30 μm, and the density is 0.40 g / cm 3 , the average pore diameter is 15.0 μm, the frequency of 5.0-15.0 μm pore diameter is 91%, and the frequency of pore diameter above 20.0 μm is 3%.

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Abstract

A separator composed only of non-fibrillated fibers containing 20 to 60% by mass of polyester main fibers and 10 to 70% by mass of polyester binder fibers as a binder The material contains 10 to 30% by mass of polyvinyl alcohol. Thus, the average pore diameter of the separator can be controlled to be 5.0 to 20.0 μm, the frequency of the pores in the range of 5.0 to 15.0 μm can be controlled to be 70% or more of all the pores, and the frequency of the pores of 20.0 μm or more can be controlled to be 10% or less, and it is possible to obtain Separator with high uniformity. In addition, by using this separator in solid electrolytic capacitors and hybrid electrolytic capacitors, it is possible to improve the impregnation properties of the conductive polymer polymerization liquid and dispersion liquid, improve the capacitance characteristics, and achieve a reduction in the short-circuit failure rate. Aluminum electrolytic capacitors.

Description

technical field [0001] The present invention relates to a diaphragm for an aluminum electrolytic capacitor and an aluminum electrolytic capacitor using the diaphragm. Background technique [0002] In recent years, the miniaturization and high performance of electronic devices have progressed, and components mounted on circuit boards and the like used in these electronic devices are also required to be further miniaturized and high-performance. [0003] One of the components mounted on the circuit board is an aluminum electrolytic capacitor. In the aluminum electrolytic capacitor, an aluminum solid electrolytic capacitor (hereinafter referred to as "solid electrolytic capacitor") with a conductive polymer is used as the cathode material, and an electrolyte is used as the cathode material. Compared with the usual aluminum non-solid electrolytic capacitors (hereinafter referred to as "non-solid electrolytic capacitors"), they have excellent frequency characteristics and low equ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G9/02H01G9/145H01G9/15
CPCH01G9/145H01G9/15H01G9/02Y02E60/13
Inventor 越智贵史石休正树熊冈弘伦
Owner NIPPON KODOSHI