| 摘要 |
PROBLEM TO BE SOLVED: To provide an insulation wire provided with an insulation film which has good heat resistance, thermal deterioration properties, conductor adhesiveness, and flexibility and excellent partial discharge characteristics.SOLUTION: An insulation wire has, on a conductor 10, an insulation film 20 consisting of a first layer 21 which contains no adhesiveness improver and is composed of a first polyimide, a second layer 22 composed of a polyamide imide which is obtained by reacting an isocyanate component containing 10-70% of a dimer acid diisocyanate with an acid component, and a third layer 23 which is arranged on the second layer 22 and composed of a second polyimide. The ratios of the individual thicknesses, t1, t2, and t3, of the first layer 21, the second layer 22, and the third layer 23, respectively, to the entire thickness T of the insulation film 20 is 10-25% for the first layer 21, 10-75% for the second layer, and 10-75% for the third layer. |
