In home painting, waterborne wood lacquer construction may cause some unusual problems in high temperature climates such as wrinkling of paint film, poor adhesion of paint film, cracking of paint film, whitish lacquer layer, etc., affecting construction schedule and decorative effect. . This requires the construction personnel to have a clear understanding of the product's construction procedures and construction requirements before construction, and has skilled construction skills to ensure the best decorative effect under hot weather. The following is an analysis of abnormal conditions under this hot weather:
First, the film wrinkles
Some construction workers use water-based wood lacquer for flat coating and use a one-time thick coating method. The resulting fullness is excellent, but wrinkling occurs on the surface of the paint film. The problem is caused by the thick coating of the water-based paint film. At high temperatures, the film surface dries quickly and the thick inner layer dries slowly. During the drying process, the flow of the paint creates a difference in tension, resulting in an uneven film surface. Wrinkling. Therefore, during the construction, do not apply a thick coating. In particular, do not use the direct pouring method. You should still use a thin coating to ensure that the coating is uniformly dried and filmed to achieve the film formation effect.
Second, poor adhesion of paint film
Summer temperatures are high, and the humidity in some areas is quite high. After the general waterborne wood paint is applied, it will be found that the adhesion between the coating layers is not strong, resulting in poor adhesion, and peeling occurs between the layers, and even tearing the entire sheet like peeling. The direct cause of poor adhesion between the layers of the paint film is that painters do not polish the layers during construction. Due to the rush of the painter, in the next process, instead of grinding, the paint is applied directly on the upper layer of the paint film. With the high temperature, the time required for the formation of a solid layer between the wet paint film and the dry paint film is insufficient, making Adhesion is affected. Therefore, construction workers are required to fully polish each floor during the construction of high-temperature weather to increase adhesion. At the same time, the construction schedule should be appropriate in the morning and evening to ensure that the internal quality of the product is reflected.
Third, the film cracking
This phenomenon is also common in summer construction. In the process of construction, the film thickness of the paint layer is too thick, which results in fast film drying on the surface layer, while the thick inner layer is slowly drying, which directly causes cracking of the primer. At the same time, we must pay attention to the quality of the plate, it is recommended to buy a good stability plate.
Fourth, paint white
The main reason is that the humidity in the construction environment is too high and the coating film is too thick during construction. Because of the high temperature in summer, the humidity in some areas is relatively high. The dry time of the lacquer layer accelerates with the increase of the temperature, but the time for the dry time is relatively slow. During the construction process, the painter may neglect the dry time, and immediately after the lacquer layer is dry, another paint is applied. Causes the bottom paint layer not completely dry. On rainy days or in humid weather, white paint can easily occur.
In short, the use of water-based wood coatings for decoration in the summer process, we must focus on the thickness of the paint film during construction, it is recommended to use thin coating many times, in addition, to master the construction of the intermittent time, be sure to paint dry in the case , and then proceed to the next process construction. Ensure the construction quality of waterborne wood coatings.
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