veneered mdf provides many of the advantages of MDF with a decorative wood veneer surface layer.
In modern construction, spurred by the high costs of hardwoods, manufacturers have been adopting this approach to achieve a high quality finishing wrap covering over a standard MDF board. One common type uses oak veneer.
Making veneered mdf is a complex procedure, which involves taking an extremely thin slice of hardwood (approx 1-2mm thick) and then through high pressure and stretching methods wrapping them around the profiled MDF boards. This is only possible with very simple profiles because otherwise when the thin wood layer has dried out, it will break at the point of bends and angles.
The ways to improve the quality of MDF veneer
1. Even within the tolerance range allowed by the national standard, it cannot meet the requirements of veneer, and the thickness must be sanded before the veneer.
2. Before gluing, the board surface must be cleaned to prevent dust from floating on the surface and affecting the full contact between the veneer material and the substrate.
3. The moisture content of the veneer or the base material should be uniform. The moisture content of the veneer is higher than that of the base material, but the moisture content of the veneer should not be too high, otherwise the viscosity of the glue will be reduced. Defects such as wrinkling.
4. The viscosity of the adhesive and the amount of glue applied should be adjusted evenly during gluing, hot and cold pressing, so as to be suitable for the production site and without degumming and permeation. If the viscosity is too low, it is easy to overflow, resulting in lack of glue; if it is too high, the leveling will be poor, and the glue will be unevenly applied, resulting in local lack of glue. Strictly abide by the operating standards, mix and stir the glue in the container, and do not allow to operate directly on the roller coater, otherwise the proportion of the adhesive will be uneven and the rubber layer on the rubber roller will be damaged at the same time.
5. The time before hot pressing after the substrate is glued cannot exceed the aging time of the adhesive used. The best number of layers for hot pressing is 4~5 layers. If you want to increase the number of pressing panels, you can prolong the aging time, increase the amount of glue or reduce the viscosity of the glue.
6. When problems such as bubbling and degumming occur in production, some small skills can be used to remedy them in time. First use a syringe to directly inject the glue into the bubbling area, or use a blade to cut the veneer at the bubbling area along the wood grain, then use super glue, flatten it with an iron. When the bubbling area is large, the veneer at the bubbling area can be cut off, the base surface is cleaned, and then pasted with similar veneer.