I. Introduction
Waterborne wood lacquers include wood decoration lacquer, furniture lacquer and floor lacquer. Waterborne wood lacquer, only semi-finished products, must pass through a construction process until the film is formed on the substrate and the decorative effect is produced. Its ideal decorative effect depends not only on the excellent performance of the water-based wood lacquer itself, but also on the reasonable product supporting construction, excellent construction technology and standard operation under appropriate environmental conditions. Good substrate handling, strict construction and control are the guarantee for quality engineering.
Second, the construction process: substrate processing - scraping putty (substrate flat can be avoided) - brush primer - brush topcoat.
Precautions:
1. Substrate treatment: The moisture content of wood materials is higher than 12%. It is impossible to apply when the hand touches the moisture. The wood substrate must be clean and flat, and no oil, glue or other impurities can be left on it. If there is oil, it can be removed by Tianna water.
2. Substrate treatment before carpentry construction: use universal primer or clear primer to seal (remove the surface dust, stains, especially glue before the primer is closed. Then carry out the construction), then join the woodworker. .
3, scraping putty: on the substrate, if the surface is rough, you need to apply 1-3 times of transparent putty, interval 2-3 hours, evenly flattening the layer without polishing, dry. The putty can also be arranged before the carpentry construction, or after the completion of the carpentry. Putty does not need to be diluted, generally after a primer, the blade is better.
Priming: Apply 2-3 times of primer to 4-5 hours. After each drying (specific humidity and weather conditions), polish with 800# sandpaper and dilute with 10-20% water.
Brush the topcoat: Apply 2-3 coats of paint at intervals of 4-5 hours. After each pass, polish with 800# sandpaper.
4. Before the wood paint is applied, if the oily primer has been applied, the bottom of the paint should be polished. Generally, the sandpaper is sanded with 360#, and the dust can be removed to paint the water-based primer. Otherwise, the paint will be affected. Adhesion of the film.
5. When applying the primer to the construction, for a part of the rough substrate, the substrate should be polished with 360-400# sandpaper, and the primer should be removed after removing the dust, otherwise it will affect the future construction effect. Dust that has entered the wood grain can be sucked out by a brush or cloth with a clean brush or moisture.
Third, the common construction plan:
A, varnish
1. Substrate treatment: Dust-removing, grinding the substrate with 400# sandpaper, grinding the wood-grained board and wire with the direction of the wood grain, removing the surface stains, especially the glue.
2, brush the first primer (most of the plates have been brushed oily primer or universal bottom, clear bottom) clear primer plus 15% of water.
3, fill the nail eye: Note: when adjusting the nails putty is slightly darker than the color of the board, try to use it first. After the nails are polished, they must be cleaned and cleaned with a brown brush.
4. Brush the primer for the second time. After drying, consider whether to scrape the putty one or two times. According to the depth of the wood grain, the middle can be polished.
5, brush the third primer, use 600# sandpaper to smooth the batch of putty, dry and non-stick sandpaper.
6, brush the first coat (15% water, mix thoroughly with a 300 mesh filter cloth after standing for 20 minutes, use, and clean the surrounding environment).
7, brush the last coat (800-1000 # sandpaper mill, remove the surface particles can be).
8, transparent color paint construction
Substrate treatment: first make a sealing primer
Primer: Scrape one to two times of transparent putty according to the thickness of the wood grain of the board. It is smooth and smooth. Generally, the color is mainly sprayed in the primer. Do two to three times of colored primer, spray it every time, spray it to the same color as the sample. Precise, avoid polishing.
Topcoat: Make a clear topcoat twice, if there is light grinding of the particles.
Special note: For plates with not very deep color, generally use high solid bottom. After filling the nailing process, the construction should be carried out. After adding 25% of water, it must be dried before the next process can be carried out. Dry grinding is 25 °C for 3 hours. In order to play with powder, non-stick sandpaper shall prevail.
B, white paint construction process:
1. Substrate treatment: Apply white primer once (10-15% water to seal the substrate to prevent the color of the plate from passing through. If necessary, brush the white paint substrate and brush it again to make it closed). If the primer is not applied first, the self-adjusting putty in the wooden eye will easily bulge after the water.
2, batch scraping self-adjusting putty two times (the first time thick, thick, the second thin, thin) to leveling, do not use pig blood ash as the bottom, because pig blood ash itself is afraid of water, swelling after encountering water .
Self-adjusting preparation of putty method: 1 cooked rubber + small amount of white latex + double flying powder or putty powder 2 transparent putty + double flying powder + a small amount of water. When adjusting the putty, it is necessary to have hardness and sanding, and it is controlled by the amount of white latex added.
The method of scraping the self-adjusting putty: 1 uniformly scraping the scraps to fill the solid wood seams, dry and dry with 400# sandpaper. The first time, scrape the third time. 2 thin batch, do not be too thick to prevent cracking. (The thinner the better each time).
3. After the putty is dried, it is smoothed with 600# sandpaper. Apply white primer to the first time to add water 10-15%, avoid adding too much water, dry it and then use 600# sandpaper to polish, apply the second primer. Drying time is based on actual temperature and must be done well.
4, spray, brush the first coat. (10-15% water should be remembered to be thin sprayed). After drying, smooth with 800-1000# sandpaper.
5, spray the last coat of paint, (15% water added with 100# filter cloth filter; spray a gun to cross a cross) The actual effect can be brushed again before the last time.
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