Furukawa Electric., Ltd.

Junichi Ishizuka

Minoru Saito

Isamu Kobayashi

Makoto Onodera

Hideo Fukuda

Tsuneo Aoi

Dai Fujiwara

Noriyoshi Fushimi

A multilayer insulated wire, comprising: a conductor; and at least three extruded insulation layers covering the conductor, which extruded insulation layers comprise: (A) an outermost layer composed of an extruded covering layer of a resin whose elongation rate after heat treatment by immersion in a solder at 150&#xb0; C. for two seconds is at least 290% and at least equal to elongation rate before the heat treatment; (B) an innermost layer comprising a resin whose elongation rate after heat treatment by immersion in a solder at 150&#xb0; C. for two seconds is at least 290% and at least equal to elongation rate before the heat treatment; and (C) an insulation layer that is placed between the outermost layer and the innermost layer and that is composed of an extruded covering layer of a crystalline resin with a melting point of at least 280&#xb0; C. or an amorphous resin with a glass transition temperature of at least 200&#xb0; C.; and a transformer having the multilayer insulated wire.

Multilayer insulated wire and transformer using the same

Growing community of inventors

Chiyoda-ku, Japan

Junichi Ishizuka