Insulating packaging material for capacitor

The invention discloses an insulating packaging material for a capacitor, and belongs to the technical field of packaging materials. The insulating packaging material for the capacitor provided by theinvention is prepared by taking a component A and a component B as raw materials. The component A is prepared from the following components in percentage by mass: 10 to 25 percent of epoxy resin, 10to 20 percent of cyanate ester resin, 50 to 70 percent of a filler, 5 to 15 percent of a flame retardant and 0.05 to 1.0 percent of an aid; and the component B is composed of 90-95% of epoxy resin and5-10% of a catalyst. The process conditions for preparing the insulating packaging material for the capacitor are as follows: after the component A is preheated to 70-80 DEG C, the component B and the preheated component A are uniformly stirred according to a ratio, vacuum defoaming is performed, then pouring is performed, curing is performed at 100-120 DEG C for 3-4 hours, and curing is performed at 130-180 DEG C for 6-8