Copper is the standardly used conductor material for enameled wire with excellent conductivity and very good winding ability. Enameled Copper Wire, otherwise known as magnet wire, is a highly versatile material used principally in applications that require electrical transference including transformers, inductors, motors, generators, speakers, hard disk actuators, electromagnets and other applications that require tight coils of insulated wire. Copper’s highly conductive properties make it the perfect metal for electrical applications, and it can be fully annealed and electrolytically refined to allow closer winding for electromagnetic coils. By coating the wire with insulation – typically one to four layers of polymer film – the wire is protected from contact with its own and other wires' electrical currents, preventing short circuits from occurring and extending the longevity, efficiency and applications for the wire.
Enameled wire is a main type of magnet wire, which consists of two parts: the conductor and the insulating layer. The bare copper wire is annealed and softened, then painted and baked for many times. The conductor shall be copper wire, oxygen-free and low-oxygen copper wire with smooth surface, roundness, uniform quality and no defects as specified in the specified standard. The copper wire is coated with continuous and smooth synthetic resin without foaming and other impurities. Magnet wire insulating films mainly use (in order of increasing temperature range) polyvinyl formal (Formvar), polyurethane, polyamide, polyester, polyester-polyimide, polyamide-polyimide (or amide-imide), and polyimide, to achieve different technical standard.