Research and Application of Electrostatic Powder Coating for Electromagnetic Wire

With the acceleration of the pace of my country's modern industrial construction and the rapid growth of export products, the amount of magnet wire used in electromechanical, electronics, communications, automation control and other industries is increasing, and the requirements for product quality are also increasing. Environmental protection and improving production efficiency have also put forward more stringent requirements. However, at present, in the production process of the oxide film insulated aluminum wire magnet wire commonly used in the electromechanical industry, a large amount of concentrated sulfuric acid is used to treat the metal aluminum wire to obtain the oxide film insulation layer. Because this production process uses a large amount of concentrated sulfuric acid in production, a large amount of irritating gas is volatilized in the open production process. This irritating gas not only causes certain damage to the operator's nasal cavity, respiratory tract and skin, but also brings serious pollution to the production workshop and the surrounding environment. The wastewater produced in the production also needs to be treated strictly, otherwise it will cause serious pollution to the groundwater quality. In terms of production efficiency, only 10 (roots) aluminum wires can be processed at a time, and the processing speed is relatively slow. One of the biggest disadvantages of products produced by this treatment method is that the flexibility of the coating film is poor, and it is easy to damage the insulating coating film when bending or winding in the production of electromechanical products, thereby affecting the electrical insulation and product quality of electromechanical products; Of course, this product also has its advantages. The most important advantage is that the high temperature resistance of the treated film is very good.​​

In order to overcome the shortcomings of the production process of the oxide film insulating layer obtained by the treatment of aluminum wires with concentrated sulfuric acid, some domestic units have been engaged in the research and production of powder coatings for electromagnetic wires in recent years, such as Jiangsu Lanling Chemical Group Co., Ltd., Yangzhou Sanchuan Industrial Co., Ltd. , Henan Xuchang Huayuan Alumina Wire Factory, Henan Xuchang Huachuang Technology Industrial Co., Ltd. and other units have developed electrostatic powder coatings and coating processes for electromagnetic wires. Certificate No. 279269), "Electrostatic spraying powder coating for electromagnetic wire and enameled wire and its preparation process" (Patent Publication No. CN1908096A), "Production Method of Electromagnetic Wire" (Patent Publication No. CN1542870A) and other patents and patent publications have been published successively; Also applied for "electromagnetic wire and enameled wire with friction electrostatic spraying infrared curing powder coating and its preparation method and application" (patent application No. 200810196202, 2) and "electrostatic powder coating method of electromagnetic wire and enameled wire friction spray gun" (patent application No. 200810049916, 0) and other patents. At present, the insulating polyester epoxy powder coating for insulating electrostatic spraying magnet wire has won the title of high-tech new product in Jiangsu Province, and has also passed the appraisal of scientific research achievements and new products by Changzhou Science and Technology Commission and Economic and Trade Commission, and is widely used in industrial production. application. In addition, the electrostatic spraying polyester heat-resistant insulating powder coating for magnet wire and enameled wire has also been successfully applied to the magnet wire, replacing part of the aluminum magnet wire. aspect.