Coating knowledge: Causes and solutions to eight defects of latex paint quality

Core tip: painting latex paint is a process for every family decoration, but painting latex paint is a technical work, and there may be some quality problems in the construction that need to be solved Let's take a look at the quality defects of latex paint painting, and how to solve them: quality defects of latex paint painting: quality defects of latex paint painting: 1 The main causes of unsmooth coating Because: the paint has impurities, the paint is too thick, and the quality of emulsion paint is poor Solution: the brand with good levelness shall be used in the construction, and the paint liquid shall be filtered before application of the last finishing coat The paint liquid shall not be too thick If the coating is not smooth, it can be polished with fine sandpaper 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: painting latex paint is a process for every family decoration, but painting latex paint is a technical work, and there may be some quality problems in the construction that need to be solved Let's see what the quality defects of latex paint painting are and how to solve them: quality defects of latex paint painting: Quality defects of emulsion paint: 1 The main reasons for unsmooth coating: impurities in the paint liquid, too thick paint liquid and poor quality of emulsion paint Solution: the brand with good levelness shall be used in the construction, and the paint liquid shall be filtered before application of the last finishing coat The paint liquid shall not be too thick If the coating is not smooth, it can be polished with fine sandpaper and then painted with the top coat again The quality defects of emulsion paint: 2 The main reason for the falling is that the viscosity of the paint is too low and the coating is too thick Solution: the consistency of the coating must be adjusted during the construction, and too much water shall not be added During the operation, the pen must be dipped frequently, less and more smoothly to avoid sagging and flowing In case of sagging, the paint film shall be polished with fine sandpaper after drying, and the finishing coat shall be painted again after the finishing is cleaned Quality defects of emulsion paint: 3 Main causes of blistering: improper treatment of base course, too thick coating, especially blistering when large core plate is used as base course Solution: the paint should be stirred evenly before use Besides the consistency of the paint liquid, 107 glue can be brushed on the bottom putty layer once before brushing During rework and repair, the blistering and peeling place shall be cleaned, and 107 glue shall be applied before repair Quality defects of emulsion paint painting: 4 Main reasons for falling off: low construction temperature of emulsion paint, failure to form a continuous film and crack, which will fall off in case of water; loose base, oil and other dirt, poor adhesion between the film and the base, resulting in peeling off; low strength of putty in the base layer, coating emulsion paint if the putty layer is not dry; too smooth base, resulting in poor adhesion of the film Solution: before construction, observe first If there is leakage, ask relevant departments to solve it in time Special treatment should be added It is recommended to use durable and waterproof elastic batch to do pretreatment for the wall, and then paint according to the routine The wall must be cleaned during construction Paint quality defects: 5 Discoloration and fading main reasons: some walls have too high temperature, long sunshine time, or water-soluble salts crystallize on the wall surface, and cause discoloration and fading of the paint; some walls contain too high alkali value, which infringes the weak alkali resistant pigment or resin and causes discoloration and fading Solution: do not use latex and polyurethane paint at the same time, but paint two days after the paint is finished, or paint after the paint is completely dry Quality defects of emulsion paint: 6 Main causes of cracks: the construction temperature is too low to reach the film-forming temperature of emulsion paint and continuous coating cannot be formed; the coating cracks caused by improper treatment of base course and wall cracking; the second coating is applied when the first coating is too thick and not completely dry, and the cracking of coating is caused due to different drying speed inside and outside; Cracking of the cement putty to be scraped causes cracking of the coating Solution: in the process of construction, the base course should be handled well, the temperature should be paid attention to, the construction should be carried out according to the normal process, and the quality of the selected cement putty and other materials should be guaranteed Quality defects of emulsion paint: 7 Main reasons for anti alkali and powder removal: wet construction before the base course is dry, not brushing the sealing primer and too thin coating are also important reasons Solution: if the anti alkali powder is found, it shall be reworked and repainted, and the painted materials shall be removed, and the construction shall be carried out after the base course is completely dry In the construction, the sealing primer must be brushed once first, especially for the new wall, the consistency of the top coat should be appropriate, and the white wall should be slightly thicker Quality defects of emulsion paint: 8 The main reasons for bottom penetration: too thin paint, insufficient times or poor material quality Solution: the products with high solid content and strong covering power shall be selected in the construction If the bottom is found to be penetrated, the number of times of painting the top coat shall be increased to meet the painting standard required by the wall There may be various quality problems in the process of coating latex paint, which needs to be solved by differentiation The above are several common quality defects and solutions of coating latex paint in construction In addition, the craftsmanship of the construction master is also very important, so we should pay attention to them [focus on WeChat official account "paint net"; 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