Paint knowledge | why does the phenomenon of oil leakage appear in spraying construction?

Core tip: A: the coating shrinks on the surface of the coated object, forming different shapes and sizes like beads and pinholes Like water sprinkled on wax paper, the spots show the bottom layer This phenomenon is called "running oil" Also known as "laughing." The probability of oil leakage of PE paint is higher The reason of "oil leakage" is due to the poor wettability or high surface tension of the coating on the surface The reasons for oil leakage are as follows: 1 Oil, wax and moisture mixed in the bottom layer or paint affect the adhesion of the paint film, and the surface tension of the paint film makes the paint film shrink and oil leakage 2 There are non drying diluents in the primer, such as Application scope and advantages of roller ceramic coating Recommended introduction: the surface of ceramic rubber plate used for roller ceramic coating is cast into durable rubber plate by hundreds of independent small ceramic pieces Each ceramic piece has raised characteristics Under general conveyor belt pressure, thousands of unique cast bumps can produce positive traction, prevent slipping and extend the service life of conveyor belt roller At the same time, the bottom layer adopts high-quality rubber, which has strong elasticity and can play a good impact resistance role The scope of application of roller ceramic coating is one three six 83857180 (the same as V) 1 Roller coating in extremely harsh working environment 2 The belt joint is not suitable for fixing with iron buckle; 3 It is suitable for leather Paint Home News: A: the paint shrinks on the surface of the object to be coated, forming different shapes and sizes like beads and pinholes Like water sprinkled on wax paper, the spots show the bottom layer This phenomenon is called "running oil" Also known as "laughing." The probability of oil leakage of PE paint is higher The reason of "oil leakage" is due to the poor wettability or high surface tension of the coating on the surface The reasons for oil leakage are as follows: 1 Oil, wax and moisture mixed in the bottom layer or paint affect the adhesion of the paint film, and the surface tension of the paint film makes the paint film shrink and oil leakage 2 There are non drying diluents in the bottom coating, such as kerosene, diesel oil, and finish coating without volatilization in time after drying 3 The primer is too smooth, and the adhesion to the surface is less than the surface tension of the surface coating, resulting in oil leakage 4 The poor wettability of the coating or the addition of too much organosilicon oil are not easy to form a uniform film layer, which is prone to oil leakage 5 The air in the spray room is polluted For example, the factory with polishing, acid vapor volatilization and other processes (such as shoe making, acid pickling and electroplating) around the spray room will blow the oil and acid vapor into the spray room with the change of wind direction to make the paint film run off oil Treatment of oil leakage: 1 The base course shall be well treated, and the coating shall be free of oil, wax, moisture, etc To check the separation effect of oil-water separator, check whether there is oil and water vapor in the gas path, and if there is, clean it before spraying 2 The viscosity of coating construction should be moderate, and the solvent with slower volatility should be selected, for example, the diluent used in winter should be changed to that used in summer 3 Try to avoid construction in cold, humid and smoky environment, and do not build the spray room near the factory with polishing and acid vapor volatilization 4 The amount of silicone oil in the paint shall be appropriate, and excessive blending will result in oil leakage 5 In case of oil leakage during construction, the construction shall be stopped immediately, the cause of oil leakage shall be checked, and the construction shall be conducted after elimination 6 For the workpieces that have run out of oil, they shall be fully dried before being polished and coated again 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,