Self-lubricating polyurethane paint and enameled wire

Abstract

The invention provides a self-lubricating polyurethane paint and an enameled wire using the same. The polyurethane paint is prepared from, by mass, 30-50% of polyurethane resin, 10-50% of cresol, 5-40% of aromatic solvent oil and 0.1-6% of high-temperature-resistant paraffin; the enameled wire sequentially comprises a conductor wire core, an insulating primer layer and a self-lubricating paint layer from inside to outside, and the self-lubricating paint layer is prepared from the self-lubricating polyurethane paint. According to the polyurethane paint, the high-temperature-resistant paraffin is added into the traditional polyurethane resin, the static friction coefficient of the polyurethane paint can be effectively reduced, and the polyurethane paint has good thermal stability.

Description

technical field [0001] The technical proposal belongs to the technical field of enameled wires, in particular to a self-lubricating polyurethane paint and enameled wires. Background technique [0002] Enameled wire, as basic electrical material, is widely used in motors, transformers and other products. Among them, polyurethane enamelled wire is mainly used in small power motors. There is a winding process in the motor manufacturing process. It is easy to shape during winding and reduces the risk of poor paint film damage during the winding process. Occurrence, generally adopt the nylon layer on the outermost layer of the paint film. However, due to the low heat resistance level of nylon (generally 130), the heat level of the enameled wire after nylon coating is affected. In order to ensure the reliability of the motor in the motor manufacturing process, it needs to be dipped in paint after winding. In recent years, in order to improve the environment, it has gradually chang...

AI Technical Summary

Problems solved by technology

However, due to the low heat resistance level of nylon (generally 130), the heat level of the enameled wire after nylon coating is affected. In order to ensure the reliability of the motor in the motor manufacturing process, it needs to be dipped in paint after winding. In recent years, in order to improve the environment, it has gradually changed. It is impregnated with water-based paint, but the drying of water-based paint requires a higher temperature and longer time than the original impregnated paint. The original nylon paint coating process can no longer meet the actual needs

In addition, limited by the baking process of the enameled wire manufacturing process, nylon paint can only be low solid content (generally 6-8%), and the use of a large amount of organic solvents is not environmentally friendly.

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