Capsule rubber material for transformer

The invention provides a capsule rubber material for a transformer. The capsule rubber material is prepared from the following components in parts by weight: 100 parts of nitrile butadiene rubber, 69to 71 parts of carbon black, 19 to 21 parts of a plasticizer, 2.9 to 3.1 parts of graphene oxide, 4.9 to 5.1 parts of an activating agent, 0.9 to 1.1 parts of stearic acid, 1.9 to 2.1 parts of an anti-ageing agent, 0.9 to 1.1 parts of sulfur and 4 to 4.4 parts of a vulcanization accelerator. According to the capsule rubber material, the nitrile butadiene rubber with excellent oil resistance is adopted to intensively improve the oil-resisting performance and heat ageing resisting performance; the graphene oxide is added so that the dispersity of nitrile butadiene rubber filler is increased, andthe mechanical properties, high barrier performance and high anti-ageing performance of the nitrile butadiene rubber are improved, and furthermore, the service life of the capsule rubber material isgreatly prolonged. 本发明为种用于变