Why does the coating on the surface of a painted product sink? There are two reasons: First, after the paint is sprayed, it takes a long time to dry completely. Generally, furniture factories and wooden door factories Just wait three or four hours before polishing. In fact, the paint is not completely dry at this time, the remaining solvent will continue to evaporate, and the paint film itself will continue to shrink. If the product is ready at this time, it will naturally affect the product in the future. The second is that all materials in nature will sag due to the gravity of the earth's center, so the paint layer after film formation, as long as the holes in the underlying material (solid wood, veneer) are not filled in, will gradually sink and have high hardness. A softer paint will sink more slowly, while a softer paint will sink faster.
How to prevent coating from sinking?
When furniture factories and wooden door factories produce high-quality products, they must pay attention to the above issues. Try to fill the wooden holes completely and give the paint film enough time to dry and sink before sanding. When producing furniture in Europe, it is usually necessary to wait 24 hours before sanding after each application of primer. After polishing, spray a second primer, wait another 24 hours, then polish, and then spray a third coat after polishing. Prime again and wait 24 hours before sanding. The topcoat will be sprayed only after the flat primer is fully prepared. The main reason for this operation is to allow the coating to fully sink before sanding it flat. In this way, the final product is not easy to sink, so that the final product has a more perfect effect and stability.
To build a house, you must first lay a good foundation; the same is true for painting. If the primer is not handled well, no matter how hard you try later, you will not be able to make a good product. We have a famous saying in China: Slow work produces careful work. If we are eager for success and violate the laws of nature when doing painting work, it will be very difficult to produce high-quality products. But at the same time, we must also face reality correctly: it is unrealistic for our factories to produce furniture and wooden doors like European companies. Because the manufacturing cost of our products does not allow for such a time-consuming operation. So, is there a way to achieve a better and more stable surface coating effect as much as possible while ensuring the current production efficiency? The answer is yes. We can make some improvements in the selection of coating varieties and the design of processes.
Nowadays, most wooden door factories use PU transparent primer. PU paint is indeed a paint variety with good comprehensive performance, and the construction is also relatively convenient. However, if you want to produce wooden door products with higher requirements, we recommend using PE transparent primer as the base. Under the same process conditions, the surface coating effect and stability of the products produced are much better than those commonly used today. PU transparent primer. This is determined by some irreplaceable excellent properties of PE paint.