New Impregnation for Paper Capacitors

The possibility was examined of improving paper capacitors by the applications of new types of impregnants. The tests proved that the paper capacitors impregnated with the various new impregnants can be improved to such an extent that they are as good as plastic film condensers in stability, heat resistance, and temperature coefficients. In addition, paper capacitors are far smaller than plastic film dielectric capacitors. The research work undertaken showed that one way to develop the capacitors lies in research into impregnants, especially heat-resisting casting resins.