Enameled Wire can be divided into polyester enameled wire, polyester-imide enameled wire, polyamide-imide enameled wire, polyimide enameled wire, polyester-imide/ The polyamide-imide enameled wire, corona-resistant enameled wires, oily paints, acetal paints, polyurethane enameled wires, etc. according to the insulation paint used. Sometimes it is also classified according to the particularity of its application, such as self-adhesive enameled Wire, cryogen-resistant enameled wire, etc.
The earliest enameled wire was oily enameled wire, made of tung oil, etc. The paint film has poor abrasion resistance and cannot be directly used for manufacturing motor coils and windings, and a cotton yarn wrapping layer needs to be added when in use. , can be directly used in motor windings and is called high-strength enameled wire.
With the development of weak current technology, self-adhesive enameled wire has appeared again, and coils with better integrity can be obtained without impregnation and baking. However, its mechanical strength is poor, and it can only be used in micro and special motors and In addition, in order to avoid the trouble of removing the paint film in advance during welding, a direct-welding enameled wire has been developed, the coating film of which can automatically fall off in a high-temperature tin lining tank, Thus making the copper wire easy to weld.
Due to the increasingly wide application of enameled wires and the increasingly strict requirements, composite enameled wires have also been developed. The inner and outer paint films are made of different polymer materials, such as polyesterimide/polyamideimide enameled wire.