Abstract: A loudspeaker copper foil wire according to the present invention is excellent in flame resistance, moisture resistance, corrosion resistance, hopping resistance and soldering property, and capable of suppressing emanation of smell during a soldering operation. In the present invention, a copper foil wire body is impregnated or coated with a flame resistant wax prepared by blending 5 wt % to 50 wt % of a halogen-free aromatic condensation phosphoric ester flame retardant in a petroleum paraffin wax base.

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 (8), each of which is wound by copper foil (9) and braided together or stranded, and then impregnated with the wax in order to form a wax layer (10), it realizes to provide a highly flame resistant flexible wire which satisfies the UL Standards 94V-2 or higher level without degrating its flexibility.

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 (8), each of which is wound by copper foil (9) and braided together or stranded, and then impregnated with the wax in order to form a wax layer (10), it realizes to provide a highly flame resistant flexible wire which satisfies the UL Standards 94V-2 or higher level without degrating its flexibility.