High-temperature-resistant hot-melt self-adhesive enameled wire

Abstract

The invention belongs to the technical field of enameled wires, and particularly relates to a high-temperature-resistant hot-melting self-adhesion enameled wire. The enameled wire comprises a wire core, a bottom coating and a surface layer. The surface of the wire core is coated with the bottom coating; the surface layer is coated on the surface of the bottom coating layer; mica powder is mixed in the bottom coating, and the mica powder is made of sericite; the particle size of the mica powder is 600 to 700 meshes; the volume fraction of the mica powder in the bottom coating is 8-12%; the prepared enameled wire is good in heat resistance, the coating is not prone to damage, and meanwhile the enameled wire is high in strength and not prone to breakage.

Description

technical field [0001] The invention belongs to the technical field of enameled wires, in particular to a high-temperature-resistant hot-melt self-adhesive enameled wire. Background technique [0002] The existing enameled wire is usually composed of a round conductor and coated with multiple layers of varnishes with different functions. The more commonly used varnish films on the market are polyester, polyesterimide, polyurethane and polyamideimide. Wait. However, these enameled wires need to be dip-coated with bonding resin to bond the turns of wires together during use. The process is relatively complicated. At the same time, because the surface of the conductor is relatively smooth, the paint film coated on the surface is easy to break after being subjected to high temperature or violent movement. and fall off. Self-adhesive enameled wire can be self-bonded and formed under appropriate solvent or temperature conditions. However, most self-adhesive enameled wires on th...

AI Technical Summary

Problems solved by technology

However, most of the self-adhesive enameled wires on the market still have a lot of room for improvement in terms of tensile strength and paint film bonding strength.

[0003] There are also some technical solutions about enameled wires in the prior art. For example, the Chinese patent with application number CN201920755218.6 discloses a self-adhesive enameled wire, including a protective sleeve. There is an installation through hole, and a wire core is installed in the installation through hole. There are buffer grooves on the four sides, and two moving blocks are slidably installed in the buffer groove. A support rod is hinged on the moving block. One end is hinged with the inner wall of the sleeve, a sliding bar is fixed in the buffer groove, and the moving block is slidably sleeved on the sliding bar. side; the enameled wire prepared in this scheme can effectively improve the anti-extrusion performance of the enameled wire, and ensure that the enameled wire can quickly return to its original shape after being squeezed by an external force, and avoid deformation or breakage of the enameled wire; however, in the actual application process, the enameled wire The structure of the protection mechanism used for the core of the enameled wire in the scheme is relatively complicated, the production is difficult and the production cost is high. In addition, the diameter of the core of the enameled wire is relatively small, and the complex structure of the protection mechanism in the scheme is relatively small. It is difficult to manufacture and increase the production cost when it is used. In addition, after the additional protection mechanism, the diameter of the enameled wire increases significantly, the volume of the coil prepared by using the enameled wire increases, and the production cost increases.

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