The main function of insulating impregnating varnish is to increase breakdown voltage, thermal conductivity and reduce moisture absorption. The surface of the conductor is coated with an insulating layer, which plays the role of insulation and protection. Insulating varnishes that can still maintain good thermal strength and dielectric properties at high temperatures are also called high-temperature (impregnated) insulating varnishes.
Dipping varnish is the most widely used, and can be used to dip porous insulating materials (such as cardboard, gauze, fabric, etc.), motor windings, electrical coils, etc. High-temperature insulating dipping varnish can be used to dip high-temperature-running motors and electrical equipment.
The commonly used 1032 alkyd dipping varnish is a Class B insulating dipping varnish for supporting small and medium-sized motors, transformers and other electrical products. The varnish is cheap, easy to use, and has good performance. It is one of the most used solvent-based insulating varnishes in my country. However, its curing time is long. For example, when impregnating motors and electrical coils, it often needs to be baked for more than ten to dozens of hours, which not only consumes a lot of energy, but also takes a long time. Type 1038 alkyd dipping paint. Due to the improvement of the activity of the main resin, the dryness of this paint is greatly improved. The drying time of thick layers is 6~8 hours (120 ℃), and the drying time of thin layers is 10~15 minutes. (105°C), and other properties also meet or exceed 1032 dipping paint. For this reason, many electrical and electrical industries currently use 1038 dipping paint to replace 1032 dipping paint, and good results have been achieved.
