... low temperature resistance 2,electricity insulativity radiation 3,etching resistance 4,corona resistance 5,therma Corona Resistance Polyimide FilmIn ... major insulation, external insulation of big coil and corona resistance protective layer of large tractive motor, ... No.IndexUnitValueTY6051-CRTY6251-FCRSingle sideTY6251-FCRDouble sides1Corona resistance periodPulse frequency:20KHz:Pulse rate factor:50 ...