Denso Corporation

Unimac Ltd.

Yumi Nakane

Shinsuke Sugiura

Tatsumi Hirano

Yasunari Ashida

Kazuomi Hirai

Yuki Amano

Futoshi Kanemitsu

Masatoshi Narita

Takefumi Kaji

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&#x2032;-biphenyl tetracarboxylic acid dianhydride, 5 mol % to 20 mol % of 3,3&#x2032;,4,4&#x2032;-benzophenone tetracarboxylic acid dianhydride, and 5 mol % to 40 mol % of pyromellitic anhydride with a diamine component containing 4,4&#x2032;-diaminodiphenyl ether.

Insulated wire

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&#x2032;,4,4&#x2032;-biphenyl tetracarboxylic dianhydride and 20 to 50 mol % of pyromellitic anhydride with a diamine component containing 4,4&#x2032;-diaminodiphenyl ether.

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&#x2032;,4,4&#x2032;-biphenyl tetracarboxylic dianhydride, 5 to 20 mol % of 3,3&#x2032;,4,4&#x2032;-benzophenonetetracarboxylic dianhydride and 5 to 40 mol % of pyromellitic anhydride with a diamine component containing 4,4&#x2032;-diaminodiphenyl ether.

Growing community of inventors

Inabe, Japan

Yumi Nakane