Coating process: construction process of fluorocarbon paint for exterior wall

Core tip: the construction process of fluorocarbon paint is different due to different spraying materials The construction process of fluorocarbon paint for exterior wall is attached for reference only 1、 Basic level requirements 1 The base quality of plastering and concrete shall conform to JGJ code for construction and acceptance of building decoration engineering 2 There shall be no dirt on the plastering layer or concrete surface layer (including the partition joint, near the window frame, etc.) 3 The surface of the base course must be firm and free from looseness, cracks or peeling The flatness shall be ≤ 2mm The base course shall be free of floating dust and adherent particles 4 The water content of plastering and concrete base coating for external wall shall not be large Paint knowledge | precautions for wall paint color selection Recommended introduction: when painting the wall, the owner sometimes has difficulty in choosing what color of the wall paint to paint In fact, there is no ugly color in the wall paint, only the disharmonious color matching The use of wall color contains the knowledge of health Too strong color will stimulate people's perception, make people have a sense of fidgety, affect people's mental health Grasp the basic principles of wall color and paint a colorful space 1、 Wall paint color selection notice 1 Light color is generally used for the top surface Light colors make people feel light, dark colors make people feel heavy Usually, the treatment of rooms is from top to bottom, from shallow to deep For example, the ceiling and walls of rooms are white and Coating home news: the construction process of fluorocarbon paint varies due to the different spraying materials The construction process of fluorocarbon paint for external wall is attached for reference only 1 The base quality of plastering and concrete shall conform to JGJ code for construction and acceptance of building decoration engineering 2 There shall be no dirt on the plastering layer or concrete surface layer (including the partition joint, near the window frame, etc.) 3 The surface of the base course must be firm and free from looseness, cracks or peeling The flatness shall be ≤ 2mm The base course shall be free of floating dust and adherent particles 4 The water content of plastering and concrete base coating for external wall shall not be more than 10%, and the pH value shall not be more than 9 The newly painted cement mortar wall shall be cured for more than 10 days in summer, more than 20 days in winter, more than 21 days in summer and more than 28 days in winter 2、 Base surface treatment 1 Check the flatness of the wall surface The large protrusions shall be sanded and leveled The large depressions or holes shall be filled with cement mortar and polished and leveled 2 Cut the large cracks on the wall surface and fill the high elastic putty for several times until the wall surface is flat After the putty is dry, polish and leveled 3 Use a brush, blade or sandpaper to remove the particles and sundries on the wall surface, and remove the loose cement layer on the wall surface 4 After treatment, it is required to meet the flatness requirement of ≤ 2mm 5 The wall surface shall be basically clean, free of floating dust and adhering particles 3、 Full batch of special anti crack putty for fluorocarbon paint 1 Use special anti crack putty for fluorocarbon paint: special additive for anti crack putty for fluorocarbon paint: water = 20; 1; 8 to mix the putty The putty must be fully stirred with electric hand drill 2 The longest storage time is 4 hours, which shall not be used for more than 4 hours, and the solidified slurry shall not be used; the wall surface shall be checked to see if there is any dirt such as particle dust, etc., which shall be cleaned 3 Use a two meter long aluminum alloy guiding rule to drag and scrape putty First scrape once vertically, then scrape once horizontally The running speed and force of the guiding rule shall be balanced, otherwise it will form wave shape along the moving direction of the guiding rule and affect its flatness 4 Paste the decorative tape, divide the grid strip as required, put putty on the grid after dividing, and then tear off the tape one by one 5 Putty is generally applied for 4-5 times; 6 After the putty layer is dry (generally no more than 4 hours), sanding is carried out If the time is too long and the putty is dry and hard, it will be difficult to sand (pave manpower and sandpaper) It is necessary to polish the coarse and coarse greasy surface completely, or a large number of putty will be paved in the subsequent construction 6 It shall be polished with 120 mesh or 150 mesh sandpaper 7 After the putty is polished, the unevenness of the wall surface shall be eliminated completely, and the external angle and waistline shall be straightened at the same time 4、 Polishing putty construction 1 Polishing putty construction shall be carried out at the length of polished putty 2 The surface is required to be free of scratch marks, especially the internal and external corners, drip lines, window edges and walls around downpipes 3 The line is straight, the external angle is straight, and there is no defect 4 Pick with nails without powder dropping, and the bonding force is qualified 5 The hand feel is smooth without bumps and UPS 5、 Primer spraying 1 Check whether the putty meets the requirements and repair the problem in time 2 Spray primer on the completely dry wall (the wall shall be dry, and the water content of the wall shall be less than 8%) (the air pressure shall be 5-8KG / cm2, without water spray) 3 It is required that the spraying shall be average and shall not be missed The color shall be uniform and shall not be flashed The construction shall not be carried out in windy (above grade 6) and rainy days 4 The primer shall be sprayed once and inspected after spraying If there is batch scratch mark or bee eye on the wall, it must be polished to meet the requirements 5 280 mesh or 360 mesh water abrasive paper shall be used for grinding, and the grinding shall be careful, and the coating shall not be worn through 6 After grinding, dust removal shall be carried out, and the dust generated by grinding on the wall shall be cleaned with rags If dedusting is not thorough, fluorocarbon paint will not be able to achieve smooth coating after construction 7 After spraying the primer, the color and luster shall be average, and the coating surface shall be smooth without dust and other stains 6、 The primer must be completely dry, and there shall be no dust and other sundries on the wall 2 Construction ratio, main paint: curing agent: diluent = 10:1:2 3 The blended fluorocarbon paint must be filtered with 200 mesh screen, and the diluent shall be continuously stirred during the placing process to avoid precipitation 4 Spray gun model: w-77, nozzle size: 1.5-2.0mm, air pump pressure: 0.3-0.5mp 5 During the construction, the cooperation of spraying number, spraying area, spraying base surface and distribution of hanging cage shall be considered Considering the actual situation of the project, the laying construction staff shall spray at the same time, and the spraying thickness shall be as much as possible without sagging 6 Anti pollution and anti-virus work shall be done well Downpipes shall be protected Workers shall wear anti-virus masks, gloves and other protective articles during construction Meanwhile, fireworks are strictly prohibited The spraying shall be average, with fair density, without sagging, uneven light and shade, blooming and other phenomena The hand feel shall be delicate, with average luster, without batch scratch marks and unevenness 7、 Clean up 1 Clean up the polluted places such as glass and downpipe, pay attention to the protection of other finished products, and clean them thoroughly 2 Clean the living area and inventory area and restore the original 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,