What are the glue methods for blockboard?

The so-called blockboard is a kind of decorative board which is widely used in the modern home decoration industry. The most important part of the blockboard in the production process is gluing, joinery. The board gluing method and the gluing process determine the quality of the board to a certain extent. So what are the gluing methods of the blockboard in the production process? What do you need to pay attention to during the gluing process?

Usually in the process of producing blockboard, the slab combination is generally five layers, the glue is applied on the second and fourth layers, and the three-layer structure is glued on the core plate. Generally, the gluing method includes hot pressing method and cold pressing method. Different production methods have different production considerations.

Blockboard hot pressing method: The advantage is high production efficiency and good product bonding quality.

For example, the urea-formaldehyde resin blockboard is manufactured, the unit pressure is 0.6-1.2 MPa, and the hot-pressing temperature is 100-120 degrees Celsius. The hot pressing time depends on the thickness and structure of the slab. For the part of the veneer covering material in the slab, the hot pressing time is 50-60 seconds per 1 mm plate thickness, and for the core plate, the thickness of each 6 mm plate is required to be hot pressed for 1 minute, and the plate having a thickness of 19 mm is generally required. About 7-11 minutes. If the phenolic resin bakelite board is produced, the hot pressing temperature and the higher unit pressure are used than the urea-formaldehyde resin glue, and the hot pressing temperature is 125-145 degrees Celsius, the pressure is 1.0-1.2 MPa, and the thickness is 19 mm. , about 11 minutes. The lower the hot pressing temperature, the lower the internal stress of the slab, the higher the flatness of the sheet, the lower the pressure, the smaller the compressibility of the slab, the smaller the deformation of the sheet after hot pressing, the less warpage and unevenness of the sheet surface, so the heat The pressing method can improve the quality of the blockboard to a certain extent.

Blockboard cold pressing method: The advantage is that the internal stress of the finished product is small, the deformation is small, the wood compression loss is small, and the disadvantage is that the production cycle is long.

When cold-pressed and glued, the plasticity of the wood and the adhesiveness of the adhesive are poor, and a relatively high unit pressure is required. When the urea-formaldehyde resin is cold-pressed and glued, the unit pressure is 1.2 MPa, and the bonding time is 6-8 hours.

No matter what kind of gluing method is chosen, if the details of the gluing method are not in place during the production process, the quality of the plate will be affected to some extent. Therefore, in order to ensure the quality of the blockboard, Xiaobian suggests that you should choose the formal Buy a plate company with a certain production strength to buy it!