MDF wood panels are made by mixing wood filaments and bonds under brume heating and pressure. There are numerous voids in the material, which is largely hygroscopic, and the glue contains a certain quantum of small patch volatiles. Still, it still requires an a multi-step process for MDF wood-grounded panels to be completely carpeted. Taking its coating process, as an illustration, the operation of pre-treatment is veritably important.
Due to the hot pressing of MDF board wood fiber and glue, there are a lot of voids in the board and on the face. Thus, the purpose of its pretreatment is to fill and close these gaps as much as possible to gain a thick and smooth face analogous to an essence plate, so as to gain a smooth and smooth greasepaint coating film. Another purpose is to ameliorate the heat resistance of the MDF board, so that it can help the side cracking of the MDF board and the quality blights similar to blistering and perforations caused by unpredictable feasts during the melting, leveling, and curing process in the medium surge infrared heating drying lair. So its pretreatment has its own characteristics.
Pre-treatment back cover system
Greasepaint coating back covers This back cover system is used in Europe and the United States. The greasepaint of the reverse cover adopts library paste greasepaint coating with a lower melting point and curing temperature, which can close the gap and gain a smooth reverse cover coating.
Due to the use of high-quality MDF distance, there are many volatiles and low hygroscopicity, so the greasepaint sealing subcaste isn't prone to cracking, blistering, perforations, and other blights during the melting and solidification process.
This back cover process is suitable for sheeting special-structured MDF boards. Still, the price of this MDF board and library paste greasepaint manual is fairly precious, so it's delicate for ordinary cabinetwork manufacturers to accept this high-cost construction system.
UV coating back covers The construction system of UV liquid coating back cover has made progress in China. It can seal the fringe of the MDF board well, reduce the blights similar to cracking of the board, insure the appearance quality of the greasepaint coating film on the face of the MDF board, and has high coating effectiveness. It's suitable for blockish and round product back covers.
Water- grounded makeup back cover Water- grounded makeup is developing fleetly in China. It and greasepaint coating are both the coatings that are vulgarized and applied by the country. As the reverse cover material of MDF board, it has environmental protection, low price, and its process is easy to connect with the traditional spray oil process, and it's easy for workers to operate. Mastery and other advantages.
The selection conditions of water-grounded manuals are fairly high. At present, domestic library paste- modified acrylic water- grounded maquillages and library paste- modified polyurethane water- grounded maquillages are each available kind, with a solid content of 40-45. The advantage of this reverse cover system is that it can be applied to the edge sealing treatment of MDF special-structured boards.