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    Home > Coatings News > Paints and Coatings Market > Paint technology: seven important processes of wood paint construction

    Paint technology: seven important processes of wood paint construction

    • Last Update: 2020-04-03
    • Source: Internet
    • Author: User
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    Core tip: three paint, seven division of labor, quality from the details, if the construction of a good paint is not good, also can not produce good results Xiaobian sorted out the "seven important processes of wood paint construction", hoping to help the painters who are engaged in home paint decoration and those who enter the paint technical service in the early stage 1、 Base course surface treatment: In the coating of wood products, the surface treatment of the blank mainly includes the adjustment of the color of the base material, the cleaning of the oil stain, the mending of the nail hole and the grinding 1 Base material color adjustment: mainly unified plate color, such as American style home 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 Paint Home News: three paint, seven division of labor, quality comes from the details, if the construction of the best paint is not good, the same can not produce good results Xiaobian sorted out the "seven important processes of wood paint construction", hoping to help the painters who are engaged in home paint decoration and those who enter the paint technical service in the early stage 1、 Surface treatment of base course: in the coating of wood products, the surface treatment of blank mainly includes adjustment of base material color, cleaning of oil stain, patching of nail holes and grinding 1 Base material color adjustment: mainly unified plate color, such as white phase base material red water, red phase base material green water mentioned in American furniture coating process, while in general home decoration According to the needs of the owner and designer, the red phase plate is also bleached and converted into a white phase plate, and then varnished (natural color) However, the general coating effect is rarely used in this link 2 Clean up oil stain: generally, 180 × 240 × sandpaper is used to polish along the wood grain for coating After the plate is polished, the oil stain and glue on the surface of the base course can be removed The surface of the base layer shall be smooth, clean and free from rough feel However, the polishing shall also pay attention to the technique and shall not change the shape of the finished woodwork There is a saying in the industry: "three parts of paint, seven parts of grinding" which shows the importance of polishing in transparent and colored coating 3 Nail hole mending: nail hole mending is to repair and level the nail holes and defects on the surface of the plate in a timely manner by using water-based colored putty during the grinding process, so as to make the base more perfect and flat Note: the putty color of the tacking hole must be close to the base material, and change with the base material color, but not the same After the nail hole is repaired and dried, the excess putty on the wood diameter must be thoroughly polished 2、 Plate sealing: plate sealing, in fact, is to brush the first primer on the plate Note: before plate sealing, it is necessary to first design according to the coating effect process to confirm whether the plate needs to be painted with the base color first If the base color is not needed, the first primer can be directly brushed or sprayed 1 According to the needs of the product coating process, if the base surface is first painted with the base color, the first primer must be painted instead of brushing, otherwise it is easy to brush the dirty base color For the first primer, many coating factories have produced the special sealing agent for plates, such as making the special sealing agent for plates have the best effect 2 When painting the first primer, the viscosity should not be too high, and it is not suitable for one-time thick coating Otherwise, the coating is easy to produce pinholes and bubbles (fish eyes) 3、 Wipe color: wipe color is a high-grade transparent colored coating, one of the most important processes in the bottom coloring process, generally need to be carried out after the sealing primer is dry There are also a few hard or oily plates that can be directly colored 1 Color erasing pigments: there are many kinds of pigments that can be used in the current market, such as oil, wood grain, color erasing, NC Grice, Pu Grice, water color Grice, etc However, it should be noted that no matter what kind of pigment is selected to wipe the color, first of all, whether the pigment has an impact on the lower paint film, whether the adhesion between the paint film is good, and whether it is suitable for large-scale construction 2 Nitrocellulose paint coating: NC Grice is mostly used for painting The furniture painted with this paint is of deep, stable and eye-catching color, which is one of the most widely used paint for modern export furniture 3 Color wiping method: generally, the non fading cotton cloth is used to dip a proper amount of color wiping pigment first, and then the closed coating is wiped clockwise quickly, and the pigment is fully wiped in the wood hole, and finally the surplus pigment on the wood diameter is wiped or semi cleaned with a cleaner rag along the wood grain Brush the lines with a brush first and then clean them with a cloth 4、 Wood hole filling material: in the process of transparent decoration and totally closed coating, wood hole filling is one of the most important processes of wood paint Transparent putty, filling agent and colored water ash are basically produced for wood hole filling However, in the application of transparent and totally closed coating of wood products, the most widely used method is direct construction of transparent primer 1 If the filler, transparent putty and colored water ash are used to fill the wood holes, after these materials are completely dry, the filler on the wood diameter must be fully polished and cleaned before the next paint can be applied; For example, first fill the wood holes with filling agent and colored water ash After these redundant fillers are polished, make 1-2 layers of transparent primer before spraying transparent colored finish or varnish 2 Wood hole filling standard: after feeling that the primer completely fills the wood hole, use 320-600 sandpaper to polish, and observe the paint film at a 45 degree angle If there is no small bright spot, it means that the wood hole has been completely filled and polished If there are small bright spots that are not enough primer, they are not well polished 3 One thing must be remembered in the construction of nitrocellulose paint: it must not be thick coated at one time because of the rush time, especially when the upper coating is not completely dry The paint film will become self defeating and dry more slowly At the same time, there will be a lot of paint film defects The best primer is thin coating and frequent coating, and the recoating time between each coating is based on the paint film polishing and non stick sandpaper If the construction period must be in time, it is recommended to choose polyester bottom and nitrocellulose surface coating process 5、 Primer grinding: primer grinding is generally divided into interlayer grinding and primer grinding before finishing 1 In fact, interlayer grinding is the grinding after each primer is dried Its main function is to enhance the adhesion between the upper coating and the lower coating (no grinding between the layers of nitrocellulose paint) so that the paint film can obtain a more flat and smooth effect Generally, 320 × sandpaper is selected for interlayer grinding Generally, the principle of grinding is "first difficult, then easy, first corner, then middle" However, it is not allowed to penetrate the bottom Paint or base color 2 Primer grinding before finishing coat: in fact, it is the grinding of the last primer The grinding of this primer is as critical as that of blank grinding, which will directly affect the final decorative effect of the paint film The first grinding of this primer can be done with No 320 sandpaper, and then with No 400 and No 600 sandpaper The acceptance standard of the grinding of this primer is: 45 ° angle smooth, observe that the paint film can't be seen basically To the bright spot (mirror painting can not have bright spot), otherwise, either the primer is insufficient, or the grinding is not in place At the same time, the polished film surface shall not have traces of coarse sandpaper, not to mention the primer 6、 Repair color: in the painting of modern home decoration wood paint, the repair color mainly includes the bottom repair color and the surface repair color 1 Bottom color repair: it is to repair the color directly on the blank substrate Generally, the bottom color repair is mainly wet spray water color The water color here is actually made of Tianna water and color essence After wet spray water color of the board, in addition to adjusting the color of the board, when the water color penetrates into the board, the wood grain will be exposed more clearly 2 Surface finishing: in fact, it is to spray finishing agent or transparent colored paint on the polished primer surface, which is the so-called surface coloring 3 When the transparent colored paint is used to repair the color, the construction viscosity of the paint should not be too high, otherwise, the poor leveling of the paint film will directly affect the clarity of the wood grain of the coating; 4 Most of the transparent colored paint used in the general construction site is color mixing without professional equipment The concentration of the color concentrate is either high or low When the concentration of the color concentrate is too high, the color is not easy to spray evenly At this time, it is better to add a proper amount of diluent and clear finish paint to reduce the concentration of the color and the construction viscosity of the color paint; 5 The transparent color of the spray gun should be 1.0-1.5 caliber, and the atomization should be good When spraying, it must be along the wood grain, and the color should be from light to deep, not in one breath This color is not easy to hang, hair In a word, the paint film of the transparent colored paint should be smooth, uniform, natural and soft 6 Before spraying transparent colored paint on the construction site, the paint must be filtered, and the ground should be sprinkled with water to prevent the dust from sticking and flowing in the workplace 7 If the paint is a color fixing agent, after the color is sprayed, a "+" clear finish shall be sprayed immediately for protection, but it shall be noted that the clear finish shall not be sprayed too wet, otherwise it is easy to cause the flow of the clear finish and cause the color to flow 8 When the top coat of the paint to be repaired is dried for about 3 hours, it can be lightly grinded with 600-800 × sandpaper along the wood grain to remove the dust particles on the surface of the coating, and then it can be delivered after the last spraying of the top coat 7、 Topcoat cleaning: in home decoration wood painting, topcoat cleaning is the last process of painting It's time for you to pay hard and harvest soon At this time, we must not be careless A little carelessness may affect the final decoration effect of the paint 1 There are generally two construction methods for cleaning the top coat, i.e spraying and brushing Generally, brushing is used for all varnish coating with low quality requirements, while transparent and colored coating Cleaning the top coat must be spraying, otherwise, it will not achieve the best paint film effect required by customers; 2 Before cleaning the top coat, especially polyester paint, it is necessary to first clean the room, coated objects, construction equipment and tools , including the clothes worn by the constructors shall be thoroughly cleaned and cleaned The surrounding ground can be properly sprinkled with some water, but it shall be noted that it cannot be sprinkled into the painted objects or buckets 3 Before paint preparation, it is necessary to fully mix the clear finish paint The curing agent of polyester paint should be added according to the product description, and it is not allowed to increase or decrease at will, otherwise it may affect the gloss and hardness of the paint film The diluent can be flexibly adjusted according to the coating effect, generally controlled within 12-15 seconds 4 When the temperature is too high, or high temperature and humidity, it is necessary to consider whether to add proper amount of slow dry water; 5 After the paint is prepared, first seal the paint tank, especially the curing agent, so that it can be used normally next time, then filter the top coat, and place it for 10-15 minutes before construction 6 During the finishing coat construction, avoid others to walk as much as possible During the construction, pay attention to the construction sequence, construction method, and the adjustment of the oil amount, air pressure and distance of the spray gun, so as to ensure the best paint film effect 7 Pay attention to the protection of the constructed objects, because when the room is too small and the air flow is not good, the finished paint is very good
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