Coating knowledge: master sharing of metal fluorocarbon paint construction process and decoration for exterior wall

Core tip: fluorocarbon paint refers to a kind of paint with fluororesin as the main film-forming material, which is widely used in the home and has excellent performance and good effect Today, let's look at the construction process of fluorocarbon paint: base treatment: 1 The base requires cement mortar plastering, troweling and finishing The outer wall shall be waterproof The flatness of the base surface shall meet the requirements of high-level plastering, the internal and external corners shall be square, the lines shall be straight, there shall be no hollowing and cracking, and there shall be no oil stain and rust The water content of the base surface shall be 8%, and the pH value shall be 9 The installation of external wall railings, window frames, pipes, and the closing of edges are completed 2 Clean and trim the laitance on the base surface, and grind the higher joints and protruding points with a hand-held grinder to avoid too thick putty Paint agent, top 10 Chinese wall paint brands Recommended introduction: interior wall paint and exterior wall paint can achieve beautiful, clean and pleasant effects, but the effects in different environments are different, so the color of the paint will be different There are ten brands of Chinese paint, ten brands of global paint, ten brands of Chinese wall paint, and ten brands of Chinese paint, Famous trademark of Chinese paint and coating In private rooms, most of us choose according to our own personality, personal hobbies and living habits The younger generation will choose the interior wall paint with rich colors and bright colors, while the older ones will have some working experience Home of coatings: fluorocarbon paint refers to a kind of coating with fluororesin as the main film-forming material, which is widely used in the home and has excellent performance and good effect Today we will take a look at the construction process of fluorocarbon paint: base treatment: 1 The base requires cement mortar plastering, troweling and finishing The outer wall shall be waterproof The flatness of the base surface shall meet the requirements of high-level plastering, the internal and external corners shall be square, the lines shall be straight, there shall be no hollowing and cracking, and there shall be no oil stain and rust The water content of the base surface shall be 8%, and the pH value shall be 9 The installation of external wall railings, window frames, pipes, and the closing of edges are completed 2 Clean and trim the laitance on the base surface, and grind the higher joints and protruding points with a hand-held grinder to avoid too thick putty 3 Paste the mesh, paste the anti crack glass fiber mesh with the dilute waterproof putty, and press it with the rolling brush The strength and toughness of crack resistant fiberglass mesh shall be good and contain adhesive, and the lap joint shall not be less than 100mm The function of fiberglass mesh is to prevent the over thick crack of leveling putty and the stress caused by the possible crack of buffer plastering layer 4 The joint cutting and caulking shall be set out and positioned according to the designed aluminum panel effect grid diagram, and the cutting machine shall be used to cut the grid joint (generally 10-25mm wide and 15-20mm deep), and the joint shall be cut on both sides, the mortar in the joint shall be chiseled, cleaned, and the interface agent shall be brushed, and then the pasteurized flexible cement caulking material shall be filled into a concave arc (the small round bar with the diameter as the joint width shall be formed) The function of the dividing joint is functional (it can prevent large area plastering from cracking, and the joint filler is elastic and waterproof), decorative (concave line imitating the effect of aluminum-plastic plate) and construction block (convenient for leveling and spraying) The grid joint shall have the same radian, be horizontal and vertical, and be controlled and checked by using the plumb bob and pulling the horizontal through line The size of each block shall be appropriate, generally about 1-2.5 square meters, and the facade effect and operation requirements shall be considered 5 Leveling of coarse putty: apply elastic waterproof coarse putty one by one according to the divided blocks, and apply one layer of putty vertically and horizontally with an aluminum alloy ruler equal to the length and width of the block respectively The second layer of putty shall be constructed after the first layer of putty is dry When scraping in batches, two people should cooperate at the same time and use force evenly The lines should be straight and the internal and external corners should be square The function of coarse putty is to level each block, the smoother each block is, the better At the same time, the thickness of putty shall be controlled as much as possible to prevent cracking The putty shall have high bonding strength, good water resistance, good construction performance and no winding The two-component or single component polymer cement putty is preferred 6 Apply a layer of waterproof fine putty vertically and horizontally to each batch of fine putty After drying, use a grinder or sanding board with fine sandpaper to polish and smooth, and remove the floating ash The function of fine putty is to fill the rough surface, make the base surface more flat and dense, and repair the grid joint in place 240-360 mesh water sandpaper shall be used for grinding, without sand mark and joint 7 Polishing putty (also known as oily putty) use extremely fine polishing putty to scrape one or two thin layers on the base surface After drying, use water sandpaper with more than 600 mesh to dip in water to polish carefully It is required that there is no rubbing and sanding marks, and the hand touch is smooth and smooth The function of polishing putty is to form a solid, fine and dense putty layer, just like the putty used for furniture paint, and the paint film is full when spraying after polishing The polishing putty can prevent the primer from infiltrating into the base layer and save the amount of paint Construction technology of fluorocarbon paint: 1 Construction of special fluorocarbon sealing primer 1 Function: to seal micro moisture in the bottom layer and prevent alkaline corrosion 2 Tools: air compressor, spray gun, scale, mixer, filter screen, etc 3 Construction method, times and dosage: spray, nozzle size 1.5-2.0, pressure 0.2MPa; construction times: 1 time 4 Construction method: (1) prepare the primer according to the proportion of the instruction, mix it well, without visible impurities (2) Before spraying, the surface shall be polished and rinsed with water, and the spraying can only be carried out after the moisture is removed (3) Spray, thin spray 2、 Fluorocarbon finish construction 1 Function: to provide the touch of the coating surface and the anti pollution and anti discoloration performance of the coating 2 Tools: air compressor, spray gun, scale, mixer, filter screen, etc 3 Construction method, times and dosage construction method: spray, nozzle size 1.5-2.0, pressure 0.2MPa; construction times: 2-3 times 4, construction method: (1) mix the top coat according to the proportion of the instructions, and mix it well The specific dosage of special diluent without visible impurities is suitable for construction The mixing must be sufficient and uniform to make the pigment disperse evenly and react fully; The materials shall be used and prepared now, and the unused materials shall be covered; the prepared materials shall be used up within 8 hours, and the thickened materials shall not be used (2) The mixture should be aged for 30 minutes to make it react fully to achieve the best effect (3) When spraying the first finishing coat, thin coating shall be adopted (4) The interval between the second coat and the first coat shall not be less than 4 hours, and thick coat spraying shall be adopted 3、 Application of fluorocarbon varnish 1 Function: to provide stain resistance and discoloration resistance of metal paint coating 2 Tools: air compressor, spray gun, scale, mixer, filter screen, etc 3 Construction method, times and dosage construction method: spray, nozzle size 1.5-2.0, pressure 0.2MPa; construction times: 1 time 4 Construction method: mix the low paint according to the proportion in the instruction manual, and mix it well, without visible impurities The specific dosage of special diluent is suitable for construction: mix it well, evenly, so that the pigment is evenly distributed and reacts well; mix it now, The unused materials shall be covered; the prepared materials shall be placed for 8 hours at most, and the thickened materials shall not be used; thin spray once Precautions for fluorocarbon paint Construction: 1 The construction temperature is 0-35 ℃, and the base surface temperature should be no less than 5 ℃ 2 Material storage shall be moisture-proof, waterproof and direct sunlight proof 3 The luster is the same, no sagging or missing coating is allowed 4 The amount of ingredients should not be too much each time, so as to avoid standing for a long time, resulting in curing 5 Special auxiliary materials must be used Water, banana water, alcohol, gasoline, etc are strictly prohibited 6 When the humidity is below 85%, the temperature is 0-35 ℃, do not construct under the following conditions: rain, snow, fog, frost, strong wind, or relative humidity is above 85% 7 After coating at room temperature, the paint film can be fully cured for about 7d, and it is not recommended to use it in advance 8 Safety measures and prevention methods: ensure good ventilation, wear protective equipment and prevent skin and eyes from being stained In case of paint splashing into eyes, please wash with water immediately and see a doctor in time No fireworks are allowed in the construction environment [focus on WeChat official account "paint net"; pay attention to surprises, scan code to see if your husband is selling paint.. 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