Wax, copper foil flexible wire with wax and speakers using this flexible wire

Abstract

This invention is intended to provide a wax excellent as a surface treating agent, a copper foil flexible wire capable of accommodating with flame resistance, and a speaker using this flexible wire. It is characterized in that petroleum wax is mixed with 50 wt %-150 wt % of liquid phosphoric ester flame retardant. In case of forming this flexible wire constituted by a plurality of core wires (,), each of which is wound by copper foil (,) and braided together or stranded, and then impregnated with the wax in order to form a wax layer (,), it realizes to provide a highly flame resistant flexible wire which satisfies the UL Standards 94V-2 or higher level without degrating its flexibility.