Patent ID: 8518535

Claim:
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° 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° 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 consists of an extruded covering layer of a crystalline resin with a melting point of at least 280° C. or an amorphous resin with a glass transition temperature of at least 200° C., wherein the resin to form the outermost layer (A) is a fluororesin, wherein the resin to form the innermost layer (B) is a resin comprising a thermoplastic linear polyester resin and an ethylene-based copolymer, or a resin comprising a thermoplastic linear polyester resin and a resin having at least one functional group selected from the group consisting of an epoxy group, an oxazolyl group, an amino group, and a maleic anhydride residue, wherein the thermoplastic linear polyester resin is partially or entirely formed by combining an aliphatic alcohol component and an acid component, and the ethylene-based copolymer has a carboxylic acid side chain or a metal carboxylate side chain, and wherein the crystalline resin to form the insulation layer (C) is a resin selected from the group consisting of a polyethersulfone resin and polyetherimide resin.