The construction and application prospect of exterior decorative coating

China Paint Online News Information:
Exterior paint construction technology:
(1) scraping putty: two putty layers, the first putty as a large surface initial scraping layer: the second putty as looking for flat layer. After scraping the two putty, should deal with the light check whether there is a noticeable bump part, the outer wall putty scrape layer in line with the principle of making the surface smooth, putty layer should not be too thick.
(2) grinding. Sandpaper sanding force to be light to be uniform, force direction to be consistent, do not appear sand scrapes, so that smooth walls become rough. And sandpaper sanding is not properly, the resulting rough surface is two sides can not be made up.
(3) anti-alkali closed bottom coating. After the engineering management personnel have qualified the putty layer inspection, they can agree to apply anti-alkali closed bottom coating, the bottom coating is usually only applied one, after 24h can be applied.
(4) face coating. Exterior coating usually uses rolling, brushing, for a larger area of the wall coating construction, first brush edge, and then follow the top-down, left-to-right way rolling coating construction. Roll coating should also first adjust the construction viscosity of the paint, rolling flowers should be delicate and uniform, the direction of use of the roller should be consistent, should not roll up and down for a while, roll around for a while, usually the roller cover coating after the spirit of rolling up and down, and then tilt the paint to pull evenly, and then gently roll up and down will apply the coating evenly brush can be.
(5) coating patch. In order to prevent batch color matching errors caused by multiple color matching, the original batch paint is usually left a little for repair, as far as possible to maintain color consistency, the same wall will not appear color difference. Roll as follows, then pull the paint evenly, then gently roll up and down to paint the coating evenly.
Use of external wall decorative paint precautions
when using exterior paint must pay attention to the following points:
(1) the wall after painting the wall should be timely maintenance and attention to drying time, maintenance does not pay attention to cause cracks in the wall, drying time is not enough, alkaline enhancement makes the exterior wall paint white alkali color change, or even partial shedding, affecting the perception.
(2) the flatness of the wall must be strictly controlled, to meet the requirements of national norms, because now many engineering exterior wall construction and the main construction is not a unit, poor coordination between each other, such as poor wall leveling will have a great impact on paint construction, relying on the paint construction team polishing, repair, it is difficult to do a good job of the overall flat wall.
(3) the process is strictly enforced. Before painting polishing, scraping putty must be serious, comprehensive, uniform, not sloppy, it directly affects the durability and perception of the paint.
(4) primer paint evenly painted, in strict accordance with the requirements of the standard deployment of construction, time interval to meet the requirements. Construction units such as random deployment, stealing materials, not in accordance with the provisions of construction, will cause color change and other phenomena, 2 to 3 years on the emergence of different degrees of quality defects.
Application prospects of exterior decorative coatings
the development of the construction industry and the need for urban beautification, architectural coatings with rich color, good safety, low price, small construction load, simple construction, short duration, easy to update, low production energy consumption and so on are increasingly valued, compared with tiles have many advantages: the 11th Five-Year Plan proposed to save resources as the basic national policy, develop circular economy, protect the ecological environment, accelerate the construction of resource-saving, environment-friendly society, promote economic development and environmental coordination. Insist on economy, clean development and safe development to achieve sustainable development. To build a resource-saving and environment-friendly society and achieve sustainable development, we must limit the development of industries that consume a lot of energy and have poor safety. This is undoubtedly the external wall paint and wall tiles in this long-term strength of the fight against the most powerful support. In addition, the exterior brick in environmental protection, production, decoration, construction, protection of buildings and other aspects of the obvious shortcomings, and in the production process of soil, coal and other non-renewable resources consumption is also quite large, relatively high prices, increased construction costs. The main task of the development of China's coating industry will be to focus on architectural coatings, so that the application of architectural coatings in exterior decoration accounted for more than 60%. Therefore, the building exterior paint has a good application prospects.