Common knowledge of coating: construction quality control and common problems analysis of real stone paint for exterior wall

Core tip: construction process Leveling → spraying sealing primer → snapping ink lines and dividing grids → sticking double-layer adhesive tape and dividing strips → spraying the first layer of real stone paint → tearing off the first layer of adhesive tape → spraying the second layer of real stone → tearing off the second layer of adhesive tape → mortar joint treatment → spraying two layers of finishing coat Quality Control 1 Small particles of real stone paint shall be used After spraying, the surface shall be flat, small fluctuation, uniform and dense particle distribution, and the color shall be the same 2 It is required that the mortar joint shall be horizontal, vertical and uniform in width; especially 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 Home of coatings: leveling the construction process → spraying the sealing primer → snapping the ink line and dividing the grid → pasting the double-layer tape and dividing the strip → spraying the first layer of real stone paint → tearing off the first layer of tape → spraying the second layer of real stone → tearing off the second layer of tape → mortar joint treatment → spraying two layers of finishing coat Quality control 1 Small particles of real stone paint shall be used After spraying, the surface shall be flat, small undulation, uniform and dense particle distribution, and the color shall be consistent 2 It is required that the mortar joint shall be horizontal, vertical and uniform in width; pay special attention not to take off the primer when the grid strip is torn 3 For all external corners, when typesetting, the long side should be opposite to the short side to give people the visual effect of whole brick masonry 4 The paper tape should be used as the dividing tape, which has a good adsorption effect on the real stone paint; if the plastic tape is used, it will lead to the flowing of the real stone paint At the same time, during the construction in summer, it is required that the tape has a good temperature resistance, so as to avoid the melting of the back of the tape with a slightly higher temperature, which will lead to the difficulty of tearing off the tape 5 Grasp the tearing time of the dividing tape When the surface of the real stone paint is dry, it can be torn off if there is no obvious indentation by hand and it does not stick to the hand If it is torn off too early, the real stone paint will flow; if it is torn off too late, the dividing tape is not easy to tear off, and the real stone paint at the mortar joint will be torn off, and the mortar joint is not straight 6 The real stone paint of the same monomer should be completed at one time to reduce the color difference Analysis of common quality problems 1 The reason of poor covering power is that the coating is not evenly mixed, and the water content of the coating mixed with water is too large or the coating is not evenly applied 2, the reason for the occurrence of water is white, the first is related to the preparation of the emulsion used in genuine stone paint Some emulsion manufacturers increase the long time of the surfactants used to increase the stability of the emulsion, resulting in the decrease of the water resistance of the emulsion Second, the genuine stone lacquer manufacturers only add a small amount of emulsion to save the cost, so that after the drying of the stone paint, the film is loose, not dense enough, the water absorption rate of the film is large, and the bonding strength is low, once it meets the rainy weather for a long time Gas and rainwater will gradually penetrate into the paint film, resulting in the whiteness of the paint film Thirdly, some stone paint manufacturers add a large number of thickeners such as hydroxymethyl fiber rope and hydroxyethyl cellulose during the preparation, and these substances are water-soluble or hydrophilic, which will remain in the coating after the film is formed, reducing the water resistance of the coating 3 The cause of blooming is that the base course has the phenomenon of efflorescence and poor cement is used When making mortar, the proportion of cement mortar is not allowed or the curing period is short; the thickness of real stone paint is uneven during construction, the amount of real stone paint is too small and too thin; the proportion of cellulose is too large during production of real stone paint, etc.4 The splashing during spraying may be caused by the unreasonable collocation of natural gravel particles in real stone paint and the unreasonable consistency of real stone paint; the next may be caused by construction reasons, such as too large diameter of spray gun and pressure of spray gun Improper selection, etc 5 The main reason for yellowing is the quality problem of emulsion in genuine lacquer Some genuine lacquer manufacturers use poor acrylic emulsion as binder, which causes decomposition and precipitation of colored matter by ultraviolet radiation, resulting in yellowing 6 The cause of shrinkage is caused by oil stain on the base, oil mixed in the coating or rain construction 7, the film is too soft because of improper emulsion selection, or low emulsion content, resulting in film coating is not enough tight mouth 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,