Low-tightness high-strength electrolytic capacitor paper and preparation method therefor

Abstract

The invention relates to electrolytic capacitor paper and a preparation method therefor. According to the low-tightness high-strength electrolytic capacitor paper, raw paper pulp of the electrolytic capacitor paper is made from hemp pulp, wherein the hemp pulp has the mass concentration of 2% to 5%, the degree of beating of 30 degree SR to 60 degree SR and the wet weight of 2g to 16g; and the rawpaper pulp is subjected to molding and laminating through double cylinder molds and is subjected to squeezing and drying, then, the surface of paper is coated with coating liquid by an amount of coating of 0.1g/m<2> to 1.0g/m<2>, and the coating liquid is prepared from polycarboxylic acid and PVA which are in the mass ratio of (1: 1) to (1: 5). According to the low-tightness high-strength electrolytic capacitor paper and the preparation method therefor, the low-tightness high-strength electrolytic capacitor paper is obtained through raw paper production and in-line coating and has relatively good strength, good water absorbency, a good loss value and excellent voltage resistance, and the tensile strength is improved by 0.4kN/m or more.

Description

technical field [0001] The invention relates to an electrolytic capacitor paper and a preparation method thereof. Background technique [0002] Electrolytic capacitor paper is one of the indispensable raw materials for the preparation of electrolytic capacitors. It acts as an isolation between the anode and cathode of the capacitor, preventing the anode and cathode from being in direct contact with each other and causing a short circuit. [0003] Electrolytic capacitor paper belongs to the category of special paper and electronic components. Therefore, different from ordinary paper, electrolytic capacitor paper has the following requirements: (1) The purity should be high, and the impurities that affect the performance of the electrolyte and electrode foil should be strictly controlled; (2) The paper quality should be uniform, the thickness and tightness should be uniform, the fiber arrangement should be uniform, and there should be no paper defects such as holes and fiber b...

AI Technical Summary

Problems solved by technology

[0004] The higher the tightness and thickness of the electrolytic capacitor paper, the greater the loss of the prepared electrolytic capacitor, and the preparation of low-loss electrolytic capacitors generally requires the electrolytic capacitor paper to have lower tightness and thickness, but the reduction of tight