Self-adhesive enameled wires are coated with a layer of self-adhesive varnish on the surface of conventional enameled wires. The cured self-adhesive varnish can be melted with ethanol and melted at high temperatures to achieve secondary melting and bonding between adjacent enameled wires.



Due to the adhesion of winding wires, most of them are coated by drop coating or dip coating process, and the solvent volatilization process causes serious environmental problems, so more and more self-adhesive wires are used in developed countries. With the development of China's economy and the emphasis on environmental protection, the demand for self-bonding yarns is also increasing.
Alcohol-fused self-bonding wires are typically used for uncovered coils, such as voice coils and deflection coils, which is advantageous where the level of temperature resistance is relatively low and where the coil must be moved and is weight sensitive. The enameled wire is passed through a felt impregnated with an alcoholic solvent (usually ethanol) to melt the fusion layer and then wound onto the pattern, and the wound coil is naturally air-dried or molded.

High-temperature self-adhesive enameled wires, which utilize heat generated by hot air or energized conductors to achieve secondary fusion, are most commonly used in stator windings for power tools.
Most self-adhesive coatings are made of polyamide (nylon) or aromatic-modified polyamides. The combination of the nylon coating and the insulating coating results in a reduced soft-break performance of the enameled wire because of the weak thermoplasticity of the nylon. In power tools, where the stator consists mainly of self-adhesive conductors, the stator windings are subjected to relatively small shocks, so that even under overload the forces between the wires are small and reduce the performance due to rupture. Softening is hardly affected. However, the excellent ductility of nylon will improve the thermal shock resistance of the enameled wire, thus increasing the life of the insulation at the rated temperature.
During the winding process, when the insulation of enameled wire is subjected to high scratching forces, the insulation may break. The rigid structure of the insulation can easily lead to a situation where the insulation breaks from the outside in, which in turn creates a risk of failure. The smooth nature of nylon helps minimize damage to the winding. Even if damage occurs, the ductility of nylon reduces the impact of external forces and damage to the insulation, thus ensuring the reliability of the insulation.

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