Abstract: An insulated electrical wire of an embodiment includes a conductor having a first and a second lateral face which are opposed to each other; and a first and a second insulating film which are arranged on the first and second lateral faces, respectively, and each of which has a pair of convex portions and an intermediate portion arranged between the pair of convex portions. A ratio of a thickness of the intermediate portion relative to a thickness of the pair of convex portions of each of the first and second insulating films is from 0.50 to 0.90.

Abstract: According to one embodiment, an insulated wire is disclosed. The insulated wire includes an aluminum conductor, and a first insulating film provided on the aluminum conductor. The first insulating film is made of a first polyimide obtained by reacting an acid component containing 50 mol % to 90 mol % of 3,3?,4,4?-biphenyl tetracarboxylic acid dianhydride, 5 mol % to 20 mol % of 3,3?,4,4?-benzophenone tetracarboxylic acid dianhydride, and 5 mol % to 40 mol % of pyromellitic anhydride with a diamine component containing 4,4?-diaminodiphenyl ether.

Abstract: According to one embodiment, an insulated wire is disclosed. The wire includes a conductor and an insulating film formed on the conductor, the insulating film including 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 10 to 70 mol % in total of 2,4?-diphenylmethane diisocyanate and dimer acid diisocyanate with an acid component; and a third layer of a polyimide obtained by reacting an acid component containing 50 to 80 mol % of 3,3?,4,4?-biphenyl tetracarboxylic dianhydride and 20 to 50 mol % of pyromellitic anhydride with a diamine component containing 4,4?-diaminodiphenyl ether.

Abstract: According to one embodiment, an insulated wire is disclosed. The wire includes a conductor and an insulating film formed on the conductor, the insulating film including 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 10 to 70 mol % in total of 2,4?-diphenylmethane diisocyanate and dimer acid diisocyanate with an acid component; and a third layer of a polyimide obtained by reacting an acid component containing 50 to 90 mol % of 3,3?,4,4?-biphenyl tetracarboxylic dianhydride, 5 to 20 mol % of 3,3?,4,4?-benzophenonetetracarboxylic dianhydride and 5 to 40 mol % of pyromellitic anhydride with a diamine component containing 4,4?-diaminodiphenyl ether.

Abstract: According to one embodiment, an insulated electric wire is disclosed. The insulated electric wire includes a conductor and an insulating film formed on the conductor, the insulating film including 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 10 to 70 mol % in total of 2,4?-diphenylmethane diisocyanate and dimer acid diisocyanate react with an acid component formed on the first layer, and a third layer of a polyimide formed on the second layer.

Abstract: According to one embodiment, an insulated wire is disclosed. The insulated wire includes an aluminum conductor, and a first insulating film provided on the aluminum conductor. The first insulating film is made of a first polyimide obtained by reacting an acid component containing 50 mol % to 90 mol % of 3,3?,4,4?-biphenyl tetracarboxylic acid dianhydride, 5 mol % to 20 mol % of 3,3?,4,4?-benzophenone tetracarboxylic acid dianhydride, and 5 mol % to 40 mol % of pyromellitic anhydride with a diamine component containing 4,4?-diaminodiphenyl ether.

Abstract: According to one embodiment, an insulated wire is disclosed. The wire includes a conductor and an insulating film formed on the conductor, the insulating film including 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 10 to 70 mol % in total of 2,4?-diphenylmethane diisocyanate and dimer acid diisocyanate with an acid component; and a third layer of a polyimide obtained by reacting an acid component containing 50 to 80 mol % of 3,3?,4,4?-biphenyl tetracarboxylic dianhydride and 20 to 50 mol % of pyromellitic anhydride with a diamine component containing 4,4?-diaminodiphenyl ether.

Abstract: According to one embodiment, an insulated wire is disclosed. The wire includes a conductor and an insulating film formed on the conductor, the insulating film including 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 10 to 70 mol % in total of 2,4?-diphenylmethane diisocyanate and dimer acid diisocyanate with an acid component; and a third layer of a polyimide obtained by reacting an acid component containing 50 to 90 mol % of 3,3?,4,4?-biphenyl tetracarboxylic dianhydride, 5 to 20 mol % of 3,3?,4,4?-benzophenonetetracarboxylic dianhydride and 5 to 40 mol % of pyromellitic anhydride with a diamine component containing 4,4?-diaminodiphenyl ether.