Paper of electrolytic capacitor and preparation method

A technology for electrolytic capacitor paper and pulp, applied in the field of paper and papermaking, can solve the problems of high short-circuit rate, single variety, unavoidable holes, etc., and achieve the effects of improving electrical performance, improving life, and low short-circuit rate.

Inactive Publication Date: 2008-08-20
ZHEJIANG KAN SPECIALITIES MATERIAL
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current electrolytic capacitor paper is mostly single-layer paper, and the variety is single, mostly made of pure wood pulp.
The paper has the following problems: (1) Because it is a single-layer paper, its holes are inevitable, resulting in a high short-circuit rate; (2), using a single fiber type, it cannot withstand pressure, reduce loss and burr resistance. Taking into account; (3), unable to meet the serialization requirements of high voltage and low voltage capacitors
These have seriously affected the service life of electrolytic capacitors and the energy consumption of capacitors.

Method used

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  • Paper of electrolytic capacitor and preparation method
  • Paper of electrolytic capacitor and preparation method
  • Paper of electrolytic capacitor and preparation method

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Effect test

Embodiment 1

[0008] Example 1: All wood pulp is used for the paper pulp of the pressure-resistant layer, and sisal pulp is used for the paper pulp of the absorbent layer. The wood pulp was beaten by disc mill to 98°SR, and the wet weight was 2.8g; the sisal pulp was beaten to 36°SR by paddle car, and the wet weight was 13.6g. Then use a double cylinder screen to make paper, and the pressure-resistant layer paper and the absorbing layer paper are formed on a wet felt and then compounded. After compounding, they are dried with a drying cylinder. When drying, the pressure-resistant layer paper is pasted on the cylinder for drying. Electrolytic capacitor paper. After measurement, the thickness of the paper is 40μm, and the tightness reaches 1.02g / cm 3 , The tensile strength is 1.85kN / m. This kind of electrolytic capacitor paper made of wood pulp as the pressure-resistant layer and sisal as the absorbing layer has a water absorption height of 3mm / 10min in the longitudinal direction and 2mm / 10...

Embodiment 2

[0009] Embodiment 2: The paper pulp of the pressure-resistant layer paper of the electrolytic capacitor paper in this embodiment adopts wood pulp, and the beating degree is 67°SR, and the wet weight is 5.6g, and the pulp of the absorbing layer paper is Manila hemp pulp, and the beating degree is 18°SR , wet weight 27g. After making paper with an oblong net paper machine, the pressure-resistant layer paper and the absorbing layer paper are formed on a wet felt and then compounded. After compounding, they are dried with a drying cylinder. When drying, the pressure-resistant layer paper is dried in a cylinder, and the roll is Electrolytic capacitor paper. After measurement, the thickness of the paper is 40μm, and the tightness reaches 0.663g / cm 3 , The tensile strength is 1.75kN / m. This kind of electrolytic capacitor paper made of wood pulp as the pressure-resistant layer and sisal as the absorbing layer has a water absorption height of 9mm / 10min in the longitudinal direction a...

Embodiment 3

[0010] Embodiment 3: The paper pulp of the pressure-resistant layer paper of the electrolytic capacitor paper in this embodiment adopts sisal pulp, the degree of beating is 40 ° SR, and the wet weight is 14.5g, and the paper pulp of the absorbing layer paper uses sambucus bark pulp, and the degree of beating is 23 °SR, wet weight 19g. Papermaking is carried out with a wave net paper machine on one side of the rotary screen. The pressure-resistant layer paper and the absorbing layer paper are formed on a wet felt and then compounded. After compounding, they are dried with a drying cylinder. When drying, the pressure-resistant layer paper is pasted on the cylinder for drying. Roll to obtain electrolytic capacitor paper. After measurement, the thickness of the paper is 40μm, and the tightness reaches 0.362g / cm 3 , The tensile strength is 1.29kN / m. This kind of electrolytic capacitor paper made of wood pulp as the pressure-resistant layer and sisal as the absorbing layer has a w...

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Abstract

The invention relates to an electrolytic capacitor paper. It adopts multilayer structure formed from one layer of pressure-resisting layer and several layers of absorption layers, and the pulp of pressure-resisting layer paper is one kind selected from wood pulp, agave fiber and grass fiber or their mixture, and the absorption layer paper can be one layer or multilayer structure, and its pulp is one kind selected from fibrila, bast fibre and grass fibre or their mixture. Said invention also provides a method for preparing said electrolytic capacitor paper.

Description

technical field [0001] The invention relates to paper and papermaking technology, in particular to an electrolytic capacitor paper and a preparation method thereof. Background technique [0002] Electrolytic capacitor paper is used between the anode and cathode of electrolytic capacitors. It can not only prevent the two poles from contacting, but also keep the electrolyte, also known as separator paper. Electrolytic capacitor paper is different from ordinary paper. Its requirements for paper are as follows: (1) high purity; (2) uniform paper quality, uniform thickness and tightness, uniform fiber arrangement, and sufficient Necessary mechanical and electrical strength; (3) Good absorbency, able to absorb enough electrolyte; (4) Good withstand voltage performance. The current electrolytic capacitor paper is mostly single-layer paper, and the variety is single, mostly made of pure wood pulp. The paper has the following problems: (1), because it is a single-layer paper, its h...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21H27/38
Inventor 陈万平王白浪
Owner ZHEJIANG KAN SPECIALITIES MATERIAL
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