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Heat resistance rating
The heat resistance requirements of different types and applications of electronic transformer products are different, each has a certain heat resistance grade. When using these impregnating lacquers, the heat resistance of the impregnating varnish must meet the heat resistance requirements of the corresponding electronic transformer. For example, an impregnating varnish selected for an electronic transformer with a heat resistance class B must be a B-grade or higher lacquer, and a low-grade lacquer cannot withstand a high heat-resistant temperature. Higher grades of paint can improve the reliability and longevity of the product. For users who use several different heat-resistant grades to impregnate the paint, sometimes a general-grade high-grade paint can also reduce the dip tank for easy management.
compatibility
The electronic transformer products are generally composed of the material skeleton, the core and the winding of the enameled wire. The selected impregnating varnish and the enameled wire should have good compatibility and will not erode the skeleton. Generally speaking, the impregnating varnish of an aliphatic solvent has a solvent with a lower solubility, and the compatibility is not problematic. The solubility of aromatic solvents and mixed solvents is strong, and compatibility should be taken seriously. Generally speaking, the degreasing enameled wire can not be resistant to benzene solvents, and other enameled wire can still be solvent-resistant, even good. Regarding the compatibility of the bake material skeleton, it can be deformed.
skills requirement
Electronic transformer insulation paint must meet the technical requirements of the product. If some products have the performance of resistance to transformer oil, some have flame retardancy, some pay attention to the bonding force, some require no noise when using, etc. According to such different technical requirements, it is necessary to select a separate performance. Paint type.
Craftability
The process is divided into two aspects, one is whether it is impregnated or painted; the other is whether it is self-drying or drying. For impregnating varnish, it is generally not possible to use self-drying lacquer, because the outer layer of self-drying lacquer is self-dried, and the lacquer immersed in it can not evaporate and cannot be dried. In addition, equipment conditions and insulation paint treatment process requirements are an important basis for the choice of paint. For example, in the case of large dip coating tanks, it is necessary to select a paint with good stability. For paints on the production line, it is necessary to select a quick-drying type of impregnating paint.
Economic
The choice of electronic transformer impregnating varnish insulation paint must also consider economics on the premise of satisfying the above four principles. The so-called economy is based on the functional requirements, the cheaper the better. This requires us to understand the familiar market, not only to select materials according to functions, but also to choose cheap, to save costs and reduce costs.
In addition, when selecting insulating varnish, it is also necessary to pay attention to environmental protection, and strive to select non-polluting or less polluting paints, and strive to select low-temperature and fast-drying energy-saving paints, and strive to select flame-retardant safety paints.