A breakdown-resistant composite electrolytic capacitor paper and its production method

Abstract

The object of the present invention is to produce breakdown-resistant composite electrolytic capacitor paper by using a long cylinder composite paper machine capable of controlling the number of layers and the arrangement structure of the pressure-resistant layer and the absorbing layer, which is used for producing medium and high-voltage electrolytic capacitors with low impedance and breakdown resistance. In the rinsing process of the breakdown-resistant composite electrolytic capacitor paper in the present invention, hydrochloric acid and sulfuric acid are uniformly added to purify the slurry, so that the metal ions in the slurry are decomposed and removed, and the electrical conductivity is reduced. The breakdown-resistant composite electrolytic capacitor paper in the present invention uses nanocellulose in the pressure-resistant layer, which helps to fill the gaps between paper fibers, increases the bonding area, reduces the probability of holes, and reduces the electrical breakdown of electrolytic capacitors during use. probability of an accident.

Description

technical field [0001] The invention belongs to the technical field of special paper for aluminum electrolytic capacitors, and in particular relates to a novel breakdown-resistant composite electrolytic capacitor paper and a production method thereof. Background technique [0002] Capacitors are the most widely used, most used, and irreplaceable electronic components. Their output accounts for about 40% of electronic components, and aluminum electrolytic capacitors account for the output value of three major types of capacitors (aluminum electrolytic capacitors, ceramic capacitors, and organic film capacitors). 45%, aluminum electrolytic capacitors are one of the fastest growing components in my country and even in the world in the past ten years. Electrolytic capacitor paper is one of the key materials for capacitors. As an adsorption carrier for the electrolyte, it has good uniformity, no impurities, and no conductive substances. The cathode formed together with the electr...

AI Technical Summary

Problems solved by technology

In the current production of electrolytic capacitor paper, rinsing is used as a purification method, and the removal of metal impurities is not complete. Moreover, most of the electrolytic capacitor papers currently produced are single-layer and double-layer structures. Due to the low thickness requirements of this product, holes are prone to appear during the papermaking process. The pressure-resistant layer and the absorption layer of the double-layer paper are prone to partial loss of a single layer. Due to the existence of metal ions and interlayer loss, it is easy to cause electrical breakdown, resulting in short life of the capacitor, damage to electrical circuits, and scrapping of electrical appliances.