The application of powder coating on furniture is an environmentally - friendly and efficient coating technology. It evenly adsorbs the powder coating on the furniture surface through electrostatic spraying and then forms a hard protective film by heat curing. This coating technology can not only provide a rich choice of colors and good wear resistance but also effectively reduce the emission of volatile organic compounds (VOCs), meeting modern environmental protection requirements.
Advantages of powder coating application on furniture
- Environmental performance: The volatile organic compound (VOC) content of powder coating is less than 5g/L. During the coating process, the excess powder coating can be collected and reused by the recovery system, with a utilization rate of about 90%, meeting the environmental performance requirements in the production process.
- Product performance: After spraying, there is no solvent volatilization in the product and no irritating smell; compared with the traditional paint finish, the paint film after electrostatic spraying of powder coating has obvious advantages in terms of hardness, wear resistance, damp - heat resistance, and dry - heat resistance; the appearance quality of the paint film on the product surface is good, which is suitable for the surface finishing of modern minimalist - style wooden furniture products.
- Production efficiency: Compared with the traditional paint finish, electrostatic spraying of powder coating has less limitation on the shape of workpieces and a high degree of automation and high production efficiency.
Challenges of powder coating application on furniture
- Board pre - treatment: In the board pre - treatment process, UV primer or water - based primer is required for sealing, which will release a certain amount of volatile organic compounds and has a low production efficiency.
- Types of applicable boards: The types of man - made boards applicable to electrostatic spraying of powder coating are relatively single. At present, fiberboard is still the most important substrate, and there are strict requirements for its density, moisture content, and thermal stability. Only a small number of man - made board enterprises can produce fiberboards dedicated to electrostatic spraying of powder coating.
- Fiberboard cracking: When the fiberboard is heated during the pre - heating and coating curing processes, as the internal moisture migrates to the surface, the edges of the fiberboard are prone to cracking, which is also the main reason why the one - time pass rate of electrostatic spraying of powder coating is only 85%.
Suggestions for powder coating application on furniture
- Develop special fiberboards: Develop special fiberboards for electrostatic spraying of powder coating and formulate relevant standards, strictly control the moisture content, density and its uniformity, and thermal stability of the boards; develop new fiberboard or other wood - based material products that can be directly electrostatically sprayed to overcome the disadvantage of primer sealing required for board pieces.
- Innovate pre - treatment processes: Innovate the pre - treatment process technology of board pieces, reduce the VOC emission in the board pre - treatment process, and improve the production efficiency of the board pre - treatment process.
- Develop low - temperature and fast - curing powder coatings: Develop ultra - low - temperature and fast - curing powder coatings for fiberboards and formulate relevant standards, optimize the coating formulas such as resins and curing agents, further reduce the coating curing temperature or curing time, thereby reducing the edge - cracking phenomenon of fiberboards caused by excessive heating.
Conclusion
The application of powder coating on furniture is a coating technology with broad prospects. It can provide an environmentally - friendly, efficient, and high - quality coating effect. However, to achieve its wide application, some technical and technological challenges need to be solved, including improving the board pre - treatment process, developing special fiberboards, and low - temperature and fast - curing powder coatings. With the continuous progress and innovation of technology, the application of powder coating in the furniture industry will become more and more widespread and become an important force in promoting the green development of the furniture industry.
HLM(holyme) Powder Coating CO,.Ltd a leader in high-temperature resistant powder coatings, can professionally customize the production of high-temperature resistant powder coatings.