INSULATED WIRE

PURPOSE:To obtain an insulated wire excellent in lubricating ability and wear resistance by using fluororesin powder subjected to surface activating treatment such as corona discharge treatment and plasma treatment. CONSTITUTION:Fluororesin powder is preliminarily surface-treated by surface activating treatment such as plasma treatment or corona discharge treatment. By such plasma treatment or corona discharge treatment, a proper amount of an activated group such as carbonyl group is formed on the fluorine resin powder surface. The thus surface activated fluororesin powder is added to and mixed with an insulating varnish, and applied onto a conductor or an insulating layer preliminarily formed on the conductor to form the outermost insulating layer. The use of the surface activated fluororesin powder provides high lubricating ability and wear resistance and also results in uniform dispersion of the fluororesin powder in the insulating layer, contributing to a good appearance.