Why does the real stone paint sample work well? When it comes to large-scale construction, there will be quality problems such as yellowing, color difference, blooming, white water, pollution, etc.? Which link does the real stone paint have problems from the sample to large-scale construction?
The sample is not equal to the finished product. Only through the sample, we can understand the quality, simulation and flexibility of the colored sand, while the color difference, blooming, pollution and discoloration will only appear in the actual construction. Of the 500 genuine lacquer cases collected throughout the country, the low quality of the lotion accounts for 25.6% of the quality problems, and the immature proportion of the system is 18.7%. The unreasonable design accounts for 23.3%, and the unreasonable construction accounts for 30.4%.
The quality of genuine stone paint must be systematized, quality emulsion, product system should be mature, design should be reasonable, and construction should be standardized.
First, the emulsion is of low quality and short service life. As the film forming material of genuine stone paint, the emulsion plays a decisive role in the performance of the coating, which is directly related to the color retention, water resistance, stain resistance, flexibility, weatherability and service life. The low price real stone paint on the market usually uses styrene acrylic emulsion, styrene acrylic emulsion waterproofing, UV resistance and flexibility are poor. In 2-3 years, there will be yellowing, cracking, coating blackening and other quality problems. If the styrene acrylic emulsion is bad, the quality problem will appear in two or three months. If you have some knowledge of the development history of genuine stone paint, it was on the market 10 years ago. At that time, it was called sandblasting instead of genuine stone paint. Due to poor waterproof, easy to crack, the demand is small. In recent years, the market recognition and demand for real stone paint are increasing rapidly, mainly due to the listing of pure acrylic and silicon acrylic system real stone paint, the product simulation, constructability, coating performance, service life, and the improvement and improvement of quality compared with the earliest styrene acrylic real stone paint. The name of real stone paint is also widely spread. Many customers choose styrene acrylic real stone paint because of low price, the main reason is the lack of understanding of real stone paint. For example, touch screen phones are very popular now, but the touch screen phones we bought still use the backward technology five years ago.
The so-called system refers to the selection and proportion of various raw materials for real stone paint. The mature system refers to the combination of various high-quality raw materials in a certain proportion, which can make the construction, flexibility, waterproof, weather resistance and service life of the products reach the best. The immature system mainly refers to the unreasonable proportions of various raw materials, such as cellulose and various auxiliaries, rather than the quality and content of a single emulsion. The high quality of emulsion is not equal to the maturity of the system. The quality problem of selecting high quality emulsion must be caused by unreasonable system or formulation.
Immature real stone paint system, such as unreasonable control of cellulose content, will lead to poor water resistance, improper selection of additives or improper proportion, which will lead to short shelf life, difficult film-forming, water marks, and serious quality problems such as coating cracking and falling off. The mature and stable system is mainly obtained by the long-term accumulation of repeated field tests. "Only through the test report of the product, we can't accurately conclude the maturity of the system, so we must do the wall experiment.
Third, unreasonable design of coating is easy to pollute no matter stone curtain wall, glass curtain wall, aluminum-plastic plate, if the design is unreasonable, the external wall will cause serious pollution. The external wall pollution is mainly caused by unreasonable design, such as the design of parapet coping, the design of drip trough and drip line on the roof and windowsill, etc. Scientific and reasonable design scheme can fundamentally ensure the beauty and antifouling of the coating, and improve the quality and grade of the building. If the design is not reasonable, no matter how good or how expensive the materials are used, pollution cannot be prevented. Of course, reasonable design also includes color matching and grid design. If the color selection or division of real stone paint is improper, the embarrassment of "made real stone paint looks like paint" will often appear. It's like our custom suits.
IV. the external wall coating with poor effect is a systematic project composed of materials, design and construction. Professional construction technology and scientific organization and management are the key guarantee to obtain high-quality finished products
The exterior wall coating system of real stone paint is composed of base course, putty layer, bottom coat, middle coat and surface coat. To ensure the quality of finished products, each process must be strictly accepted. For example, the moisture content of the base course is 10%, and the pH value (pH value) is 9. Too high moisture content will cause hollowing of the coating, and too high alkalinity will cause alkali and blooming of the coating; putty cannot be applied too thick; primer leakage will cause alkali; main material spraying must ensure the same batch of materials, the same process, the same thickness, the same section of the wall and the same batch of people on the same wall, so as to avoid the phenomenon of color difference and blooming. Any unqualified process will cause quality problems.
In addition, the construction experience of each key node is very important, such as how to avoid splicing in scaffold construction, how to make lines horizontal and vertical, how to avoid joints in internal and external corners, etc.
Real stone paint is a semi-finished product. When purchasing real stone paint, we should not only consider the R & D and production capacity of the enterprise, but also consider the technical service capacity and construction experience of the enterprise. "Three products, seven construction" is just to show the importance of professional construction.
To sum up, the degree of specialization of genuine lacquer is very strong and there are many matters needing attention. We should pay special attention to the quality of emulsion, the maturity of the system, the reasonable design and the specialized construction. Four aspects, ignore any one of them, will eventually affect