In the production process of enameled copper wire, the enamel liquid of enameled wire changes into a solid paint film after coating and baking. Theoretically, the lacquer-based polymer changes from a solution state to a polymer body, which is a complex physical and chemical process. Related to some basic concepts, especially polymer solution and related surface tension phenomena, evaporation of solvent and chemical reaction of polymer are closely related to the production process of enameled copper wire.

The production process of enameled copper wire is a process of painting enameled wires on metal wires to form a uniform paint film. Why can the paint be coated on the wire to form a uniform and smooth paint film? This problem involves liquid surface tension, wetting angle, and other characteristic parameters as well as solvent evaporation characteristics. The expression of surface tension is that the surface area of liquid is contracted to the minimum by physical force. Because the surface area of the ball is the smallest in the geometry of the same volume, if the liquid is not affected by any other force, it will become annular under the action of surface tension.

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The key to the copper enameled wire is to control the tension. When the tension is high, it not only thins the conductor, making the surface of the conductor lose its brightness, but also affects many properties of the copper enameled wire. From the outside, the copper enameled wire coated by the thinned wire has poor luster. From the performance point of view, the elongation, resilience, flexibility and thermal shock of copper enameled wire are all affected. The pay-off tension is too small, and the thread is easy to jump, causing the problem of parallel thread or thread touching the furnace exit. When unreeling, it is most afraid of uneven tension in half a turn, which not only makes the wires loose and broken, and the wires are thinned one by one, but also causes big jump inside the oven, causing parallel and collision faults. Therefore, the unreeling tension should be uniform and appropriate.

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1. Industry concentration will be further improved

At present, there are a large number of manufacturers in Enameled copper wire industry, but the scale is generally small and the industry concentration is low. With the continuous improvement of downstream industries' requirements on product quality, performance, energy conservation and environmental protection, the process of integration of Enameled copper wire industry will be accelerated. In addition, with the sharp fluctuation of copper price, it objectively puts forward higher requirements on the capital strength and management ability of enameled copper wire manufacturers. Large enameled wire manufacturers with good technical reserves and advanced production technology will stand out in the fierce competition, and the concentration of enameled copper wire industry will be further improved.

2. Accelerate the adjustment of product structure

With the rapid development of industrial electrical appliances, household electrical appliances, electronic information products and other fields in recent years, the quality requirements of Enameled copper wire products in various industries have been improved, from the original single demand for heat resistance grade to diversified demand, Enameled copper wire products need to have a variety of excellent properties at the same time.

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