General knowledge of coating: anfili: application of insulating paint with less solvent

Core tip: ENFI Technology Co., Ltd shares the basic application problems of less solvent insulating paint with friends from all walks of life, hoping to help the newcomers At present, there are many kinds of liquid insulation products in the market, and the manufacturers of liquid insulation materials in the market are also springing into the market In order to have a foothold in this narrow space, a variety of brand numbers, names, endless boasting words and so on have brought too many problems to the end users At present, there are: epoxy resin, unsaturated polyester resin, modified alkyd resin Paint knowledge how about Akzo Nobel Powder Coating Recommended introduction: powder coating is a kind of coating with different form from general coating, which is in powder form It is a new type of coating, because of its own advantages and more and more known by people Let's introduce Akzo Nobel Powder coating Akzo Nobel Powder coating is a cost-effective coating solution, which can be applied to different kinds of products After the treatment of static electricity and fire baking, a tough and durable coating surface will be formed, with the least impact on the environment Since the introduction of this technology, powder coating has been able to continue to maintain the Paint Home News: anfili Technology Co., Ltd shares the basic application problems of less solvent insulating paint with friends from all walks of life, hoping to help newcomers At present, there are many kinds of liquid insulation products in the market, and the manufacturers of liquid insulation materials in the market are also springing into the market In order to have a foothold in this narrow space, a variety of brand numbers, names, endless boasting words and so on have brought too many problems to the end users At present, according to the insulation resin, there are: epoxy resin, unsaturated polyester resin, modified alkyd resin, etc., according to the impregnation process form: drop impregnation form, roll impregnation form, immersion form In recent years, in order to improve the mechanical properties of the immersed products, continuous immersion has been developed This kind of continuous immersion is generally used for insulation treatment of coils or small electronic components, and vacuum immersion is generally used for motor products with certain volume Low pressure products with small volume can be treated by ordinary impregnation According to the market demand, it is an inevitable development trend to develop vacuum pressure impregnation Solvent-free insulating paint is widely used in vacuum pressure impregnation, because there are less volatile matters, more paint hanging, superior penetration of solventless insulating paint, etc., all aspects are superior to solvent-based insulating resin, and the impregnation process is completed once In recent years, in addition to solvent-free insulating paint and solvent-free insulating paint, a kind of high solid content solvent-free insulating paint has emerged, which has good insulation performance and can be dried quickly The amount of paint hanging in one-time impregnation process is very full, the operation is simple, the compatibility is very high, the heat resistance is excellent, etc.; the solvent-free insulating paint is generally epoxy resin Insulating resin first appeared in 190 years Phenolic resin was the first trial produced The birth of phenolic resin marked the beginning of the civilization of electrical insulating materials After 40 years of hard work in the synthesis and industrial production of silicone resin, H-class high-temperature insulating materials based on silicone resin were introduced With the development of unsaturated resin, epoxy resin and so on In the following aspects, I hope to discuss with relevant people to improve the application technology of epoxy resin for insulating paint 1、 Basic properties of epoxy paint The basic performance requirements of motor insulating paint, for example: American Dolph's series high temperature resistant solvent insulating paint bc-346-a and BC-359 high temperature class H insulating paint (vrishui), whose performance index is complete or has been recognized as the insulating paint that can meet the requirements of motor insulating system at that time, but later with the emergence of solventless paint, the test results prove that solventless resin paint is used in electrical engineering The insulation performance is better than that of solvent paint However, the emergence of less solvent and high solid epoxy resin insulation paint marks the emergence of a new scientific research achievement The less solvent epoxy resin paint also has excellent insulation performance, thick layer drying performance and moisture resistance In addition to the advantages of anticorrosion, oxidation and so on, it also has its particularity, such as high solid content of paint film, high electrical insulation resistance value after immersion, long storage life and so on Therefore, the promotion of low solvent and high solid epoxy resin insulation paint value marks a new step for insulation materials The low solvent epoxy resin paint is required to achieve high solid content, generally higher than 75%; the volatile solvent diluent part accounts for 20-25%; so that the low solvent resin insulating paint (fanlishui) has a good amount of paint hanging on the insulation winding of the motor stator, which is equivalent to the amount of the solvent-free second dip paint Less solvent epoxy resin insulation water has excellent water resistance, less solvent paint is widely used in one-time immersion process With excellent insulation epoxy resin and high permeability, it has better filling effect on motor stator insulation winding and plays a protective role in environmental climate Less solvent water has long storage period and high compatibility Generally, the normal temperature is about 30 ℃ for 1-8 months, if the low temperature can reach more than 18 months Epoxy insulating paint is compatible with general paint, that is to say, if a small amount of insulating paint you used in the working tank is not deteriorated, it can be used together 2、 Compatibility between less solvent epoxy resin paint and enamelled wire motor insulation paint plays an important role in the insulation structure It can bond the insulated winding wire and fill in the gap The vertical water and enamelled wire are closely combined, so that the product can be connected as a whole, and the damp dust in the protection environment will corrode the insulation winding of the motor When the motor starts, stops and runs normally, there is mechanical vibration caused by electromagnetic force The poor elasticity of insulating paint film will cause cracks, lead to the cracking of enameled wire layer and lose the insulating effect With the increase of electrical performance parameters after impregnation of auxiliary insulating varnish, the combination of this kind of varnish and enameled wire is considered to have good compatibility If more than 30% of the electrical properties of the combination of compatibility, the best choice of fully compatible auxiliary materials For example: 1 The original breakdown voltage of enameled wire is 15kV, which is compatible with the auxiliary insulating paint after heat curing: 14.5kv; 14kV; 13.05, which are all compatible 2 The original breakdown voltage of 11.78kv is 19.58kv; 16.35; 17.10 after curing; these are the best compatibility combinations Color after combination heat curing: generally, the vision is brown red, Heather, old yellow, etc., which is related to the color of resin color and filler; however, it has good popularity luster and slight resin smell 3： In order to achieve the desired effect, it is necessary to dip the stator coil winding of the motor with less solvent and less solvent epoxy resin, which is widely used or VPI process is required There will be some slight changes from impregnation to baking Here are some simple examples: Swiss fengluo 3042 low solvent epoxy resin high temperature insulating paint is the latest development of fengluo based on polyester resin, which is a low solvent high temperature resistant varnish The resin appearance of this product is transparent and yellowish, heat-resistant 180-220 ℃, breakdown value 50% R.H: normal 110kV / mm; volatile matter 17% The active diluent is used for configuration (generally speaking, the viscosity is too high when it is used for too long in the immersion tank) The product is easy to use and flexible, and the one-time process of vacuum immersed large stator coil is completed, which is convenient and economical Baking process: 15-80 minutes below 130 ℃; 15-30 minutes at 150 ℃ Because of its fast drying effect, it has the reputation of fast drying, high solid, high temperature resistance and high performance in polyester resin When the motor stator is immersed in 3042 less solvent insulating paint, unlike immersion of solvent-free VC BC-359 / bc-346a and solventless insulating paint with low solid content, in order to achieve the desired effect, two times of immersion is required Fengluo 3042 vertical water impregnated any device once done, regardless of the gap change of the assembly line, even the most edge seam can be super permeable, eliminating all the tedious process of twice impregnation After the stator is immersed, take it out for curing without any treatment, visual inspection: there is no obvious paint layer inside the stator core, there is a thin paint film on the surface of the winding wrapping at the end of the stator, and the paint layer is clearly visible between the turns, which shows that the paint is penetrated into the core and the winding, achieving the expected effect of paint hanging The weight loss of the stator will change when baking after the impregnation process In short, when baking and curing the stator standing water, the stator will change with the baking temperature, and the weight of the impregnated stator will change until the curing process is completed The weight loss ratio of solvent based insulating paint is higher than that of less solvent varnish, which is certain, because its volatile matter is higher than that of less solvent varnish, and in terms of baking advantage, less solvent varnish is generally produced by quick drying and high bonding force formula As the temperature continues to rise, the loss of weight will be smaller and smaller, and the insulation value will be higher and higher My simple discussion is to let you have a rough understanding of it I hope it can help you to a certain extent, and I am eager to have more literature on it Hangzhou anfili Technology Co., Ltd is willing to discuss with friends At the same time, I hope that China really has a level, conscience, corporate ethics and corporate soul of insulating material production enterprises, and create a world People's attention to high-end products, world recognized Chinese brand technology Home of coatings is specialized in coatings, diatom mud, paint coating, coating technology, fire retardant coating news and coating, diatom mud, paint coating, coating technology, fire retardant coating decoration knowledge and decoration renderings,