Preparation method of polytetrafluoroethylene insulating coating

The invention relates to a preparation method of a polytetrafluoroethylene insulating coating. Raw materials are prepared, base cloth and polytetrafluoroethylene insulating paint are prepared at first, cutting is conducted according to the needed width of the base cloth, after cutting is completed, the base cloth is spread and fixed to transmission equipment, the base cloth is non-woven fabric, and the polytetrafluoroethylene insulating paint is prepared by mixing polytetrafluoroethylene powder and water; according to the preparation method of the polytetrafluoroethylene insulating coating, polytetrafluoroethylene powder is broken and scattered through a pounding machine, then vibrated and sieved through a 20-mesh screen, large-particle materials and other impurities are removed, and then the polytetrafluoroethylene powder and water are evenly stirred in a high-speed mixer at a high speed. By means of the process mode, the problem that dust is attached to the cloth in the spraying process, and protrusions are