Coating general knowledge: floor coating system: precautions for coating primer

Core tip: after surface treatment, the first process is coating primer, which is the most basic work in the coating construction process The purpose of the primer is to create a good adhesion between the base surface and the subsequent coating, strengthen the foundation, stabilize the residual dust particles on the base surface, and play a certain role in sealing the moisture and alkali on the base surface The oil primer film is dense and has good sealing effect on the base surface, but its air permeability is poor When it is applied to the wet base surface, the film is easy to peel off due to the pressure of underground water vapor The water-based primer film is not as dense as the oil-based one, and generally has microporous structure, which can release the water accumulated underground 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 Home of coatings: after surface treatment, the first process is coating primer, which is the most basic work in the coating construction process The purpose of the primer is to create a good adhesion between the base surface and the subsequent coating, strengthen the foundation, stabilize the residual dust particles on the base surface, and play a certain role in sealing the moisture and alkali on the base surface The oil primer film is dense and has good sealing effect on the base surface, but its air permeability is poor When it is applied to the wet base surface, the film is easy to peel off due to the pressure of underground water vapor The film of water-based primer is not as dense as that of oil-based, and generally has microporous structure, which can release the water vapor pressure accumulated in the underground, and also can achieve better application effect in the wet base For example, the two-component waterborne epoxy primer has good adhesion to the concrete base, and has been widely used in wet concrete base in recent years According to the base material and surface condition, the primer variety and coating process can be selected correctly, which can improve the coating performance and prolong the coating life Generally, the requirements for the primer used for floor coating are: good adhesion with the base material; good mechanical strength; good protective performance and no bad side effects on the base material; good foundation for the later coating, no components that can penetrate into the upper coating and cause defects; good constructability and dryness The following items should be paid attention to when applying primer: ① the primer containing pigments and fillers should be stirred evenly before and during use ② The thickness of primer film shall be determined according to the primer type, and attention shall be paid to control The coating shall be uniform, complete and free from exposed bottom, floating dust and loose sand on the surface ③ Pay attention to the drying specification When the primer is applied with the paint containing strong solvent, the primer must be completely dry to avoid undercut and other paint diseases ④ The primer shall be applied in time in strict accordance with the specified time after surface treatment before painting It is also necessary to apply a layer of paint within the specified time range after the primer is dried according to the conditions specified by the primer type Early coating may cause undercut and solvent evaporation in primer, which may lead to prolonged drying time, poor curing and blistering of paint film; too late coating may cause poor adhesion between layers, and too late coating may affect the appearance due to dust accumulation or other pollution To increase the adhesion between the next coat and the primer, polish the primer before coating The method of coating primer can be roller coating, brush coating and spraying The construction efficiency of brush coating is relatively low, which is generally adopted at the corners The most commonly used is roller coating with high efficiency 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,