High-temperature-classification three-coating enameled round aluminum wire

Abstract

The invention discloses a high-temperature-classification three-coating enameled round aluminum wire which comprises an aluminum wire (1) and a paint coating wrapping the aluminum wire, and is characterized in that three layers of paint coatings are arranged, the inner layer (2) is a modified polyester paint coating layer, the middle layer (3) is a polyester imine paint coating layer, and the outer layer (4) is a polyamide-imide paint coating layer. The high-temperature-classification three-coating enameled round aluminum wire disclosed by the invention avoids the problem of lack of adhesiveness of the enameled aluminum wire, resists heat and solvents, especially has good refrigerant resisting effect, improves the thermal class to 220 DEG C due to the outer layer, greatly reduces the surface friction coefficient simultaneously, and is less tensioned to a great extent when in use.

Description

technical field [0001] The invention relates to an enamelled round aluminum wire, especially a coating layer of an enamelled round aluminum wire. Background technique [0002] As copper prices continue to rise in recent years, aluminum-substituting copper products for enameled wire conductors have emerged one after another. Its production process is roughly the same as that of copper conductor enameled wire. First, the aluminum rod is drawn into an aluminum wire of the corresponding specification, and then the corresponding insulating paint is coated on the surface. This product is used in microwave ovens, transformers, refrigerators, compressors and other products. Due to the characteristics of the aluminum conductor itself, the temperature rise of the aluminum enameled wire is larger than that of the copper wire, which requires the heat resistance of the aluminum enameled wire to be stronger. [0003] According to the current enameled aluminum wire manufacturing technolog...

AI Technical Summary

Problems solved by technology

[0006] By adopting the above-mentioned technical scheme, since the modified polyester paint coating layer is used as the base layer, the problem of insufficient bonding force between the polyester imide paint as the base layer and the surface of the aluminum conductor is effectively overcome, and the problem of loss of adhesion of the aluminum enameled wire is avoided. And because the intermediate coating uses polyimide paint coating layer, its heat resistance and solvent resistance, especially the problem of refrigerant resistance are solved.

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