The industry mainly uses Z955 aramid paper. Z955 aramid paper is an insulating paper that has been high-temperature rolled and polished. It is made from pure aramid fibers by wet spinning and high-temperature hot pressing. It has excellent high-temperature resistance, excellent electrical insulation, mechanical properties, and flame retardancy, good flexibility and tear resistance, excellent chemical stability and compatibility, good compatibility with different types of insulation paints, and good oil resistance. It can be used in conjunction with H-grade and C-grade insulation systems for long-term use at 200 ℃. Z955 is suitable for all known occasions that require sheet type electrical insulation materials, and can operate under short-term overload with strong overload resistance. It can be used for inter turn insulation, interlayer insulation, and end insulation of various transformers (mining explosion-proof transformers, power transformers, reactors, rectifiers, etc.), as well as slot insulation, inter turn insulation, phase insulation, and pad insulation of various motors (mining, metallurgical, shipbuilding, etc.) and generators. In addition, it is also widely used in electronic and electrical fields such as batteries, circuit boards, and switches.