Insulating material for solid-sealed polar poles, solid-sealed polar pole and preparation method thereof

Belonging to the technical field of solid-sealed polar poles, the invention relates to an insulating material for solid-sealed polar poles, a solid-sealed polar pole and a preparation method thereof. The insulating material for solid-sealed polar poles is prepared from the following components by weight percentage: 25.0%-28.0% of nylon, 48.0%-51.5% of glass fiber, 2.0%-3.0% of a toughening agent, 20.0%-23.0% of a flame retardant, 0.2% of an antioxidant, 0.3% of a lubricant, and 1.0% of color masterbatch. The toughening agent is ethylene propylene diene monomer; the lubricant is a fatty acid ester lubricant; and the color masterbatch is carbon black. The insulating material for solid-sealed polar poles provided by the invention adopts nylon and glass fiber, guarantees the mechanical strength and electrical properties, at the same time can effectively reduce the thickness of an insulation shell outside the solid-sealed polar pole, and the solid-sealed polar pole insulation shell prepared from the insulating mat