INSULATED WIRE, ELECTRICAL EQUIPMENT, AND METHOD FOR PRODUCING INSULATED WIRE

摘要

An insulated wire which comprises: a conductor; a foamed insulating layer that directly or indirectly covers the outer circumferential surface of the conductor and contains a thermosetting resin having air cells; and an outer insulating layer that is arranged on the outer side of the foamed insulating layer and contains a thermosetting resin which has a melting point of 240°C or more in cases where the thermosetting resin is a crystalline resin, or which has a glass transition temperature of 240°C or more in cases where the thermosetting resin is an amorphous resin. An electrical device which uses this insulated wire. A method for producing an insulated wire, which comprises: a step wherein a varnish for forming a foamed insulating layer is applied over the outer circumferential surface of a conductor and the varnish is foamed during a baking process, thereby forming a foamed insulating layer; and a step wherein an outer insulating layer is formed by extrusion molding a thermoplastic resin composition for forming an outer insulating layer on the outer circumferential surface of the foamed insulating layer.