In recent years, driven by the continuous introduction and implementation of my country's environmental protection policies, the "oil-to-water" work in the wooden furniture market is in full swing, and the market share of water-based coatings is constantly increasing. However, with the continuous deepening of environmental protection policies, wood coating has encountered various technical difficulties in the process of switching. Among them, the wood lacquer market has requirements for color repair, especially under the premise of high-efficiency production. In the color repair process, because the water-based resin is far less mature than the oil-based resin, the wet film transparency is often poor, the color difference between the dry film and the wet film is large, and the primer and topcoat are not matched well. Bottom, cracking, poor adhesion and other disadvantages.
So, is there a solution that not only shortens the painting process and production cycle, but also reduces the frequency of defects?
For seven years, Huaguoshan Environmental Protection Technology has been focusing on the independent research and development of water-based wood lacquer resins. Through the model of "R&D, production, application and sales", it has been continuously linked in the market, adapting to the market, innovating and providing customers with a professional one-stop service. The Solution - A guide for "wet-on-wet" color correction applications for the polyurethane dispersion HouXian® U320.
Efficient "wet-on-wet" process
The so-called "wet-on-wet" means that the first paint film is sprayed with the second paint before the surface is dry, so that the first paint film and the second paint film react together until the two paint films are completely dry. Integrating into one, like the paint film effect of one-time spraying, it is a method that not only saves grinding time, but also obtains ideal paint film fullness, saves time and materials, saves manpower, time and resources, and effectively improves production efficiency and utilization rate. spray method.
"Wet-on-wet" experimental process
This "wet-on-wet" process: First, mix HouXian® U320 and color essence with a color-correcting agent in proportion. After spraying, you can spray the topcoat without waiting for the surface to dry, and then wait for it to dry.
The key to "wet-on-wet" success
The "wet-on-wet" process is a huge challenge in the application of water-based paints. This is because water-based coatings are generally slow-drying. When the topcoat is sprayed on the "wet" coating film, the color-repairing agent is prone to aggregation during this process. , flower, particles and other surface defects.
HouXian® U320 is an anionic self-crosslinking aliphatic waterborne polyurethane dispersion developed from the needs of color repair. Adhesion, and the hardness of the paint film is high, the flexibility, transparency and fullness are very good, and the excellent defoaming performance ensures the beauty and modification of the finished product.
In order to "touch" well wet-on-wet, first of all, various closely related internal and external factors must be fully considered, such as supporting products, coating process, temperature and humidity of the construction environment, substrate, coating variety, wet film thickness, etc. At the same time, after spraying the second coat of paint, there are no pinholes, bubbles, sagging and other problems on the surface of the coating film, and the surface is smooth and smooth.
Implementing the research and development concept of "overcoming difficulties and innovating and breaking the situation", Huaguoshan presents the polyurethane dispersion HouXian® U320 "wet-on-wet" color repair application kit to our customers, and helps furniture factories to break through with the leading environmental protection "black technology" The "wet-on-wet" dilemma of water-based wood paint speeds up the process of "oil-to-water".