Patent ID: 9330814
Filing Date: 2016-05-03
CPC Classification: H01B,H01F,Y10T

Claim Text:
1. An insulated electric wire, comprising: a conductor and an insulating film formed on the conductor, the insulating film comprising a first layer of a first polyamideimide containing an adhesion improver, a second layer of a second polyamideimide obtained by reacting an isocyanate component containing 2,4′-diphenylmethane diisocyanate, dimer acid diisocyanate and 4,4′-diphenyl methane diisocyanate with an acid component formed on the first layer, and a third layer of a polyimide formed on the second layer, wherein the isocyanate component contains 10 to 70 mol % of 2,4′-diphenylmethane diisocyanate and dimer acid diisocyanate, and 30 to 90 mol % of 4,4′-diphenylmethane diisocyanate, and wherein with regard to a proportion of thicknesses of the first to third layers in relation to the total thickness of the insulating film, the first layer is 10 to 20% , the second layer is 10 to 75% , and the third layer is 10 to 75% .