What Requirements Should Capacitor Tissue Paper Meet?

With the development of science and technology, the function of the capacitor in the circuit is more and more obvious, and the capacitor tissue paper specially designed for this also meets new development opportunity. Capacitor insulation paper has……

With the development of science and technology, the function of the capacitor in the circuit is more and more obvious, and the capacitor tissue paper specially designed for this also meets new development opportunity. Capacitor insulation paper has become an irreplaceable part due to its advantages such as product maturity, low manufacturing cost, environmental degradation, good absorption, and high temperature resistance.

For electrolytic capacitor, the loss is mainly determined by the inherent dielectric loss of the electrode foil and the equivalent series resistance of the electrolyte. When the inherent dielectric loss of the electrode foil is constant, in order to reduce the loss of the capacitor, the absorption of the capacitor tissue paper must be improved. To achieve this goal, most manufacturers use fiber like S, M, C, B, and E with low loss values as the raw material for low-voltage electrolytic capacitor insulation paper and reduces the paper density while ensuring its tensile strength.

In practical use, one of the disadvantages exhibited by the electrolytic capacitor is that the leakage current is large, and the purity of the insulation paper, which is the raw material of the electrolytic capacitor, will become a key factor affecting the leakage current. At present, the IEC and national standards for the purity are not the same, but are far below the actual level of the current electrolytic capacitor paper. The purity future will be further improved in the future.

With the increasing level of automation in the production of electrolytic capacitors, the winding speed of capacitors has also increased, and the strength requirements for insulation papers have become higher and higher, especially for low-voltage electrolytic capacitors. On the one hand, it should meet the requirements of low loss of electrolytic capacitor; on the other hand, it should meet the requirements of miniaturization of capacitors.

Therefore, the capacitor tissue paper should have higher absorption and thinner thickness, but too low density or too thin thickness will affect the strength of the electrolytic tissue paper. It seems that we must meet the requirements of low loss and miniaturization and improve the strength of low-voltage electrolytic capacitor tissue paper.

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