Plywood is formed by multiple single-layer plywood presses, so the thermal pressure temperature and thermal pressure of the hot press have an important influence on the quality of plywood.
The temperature is too high to have a greater impact on plywood, so we have to control the appropriate temperature.
The hot pressure temperature is too low, not only is not conducive to the melting of plywood hot melt, but also will lead to the adhesive glue glue strength is too low, and even the phenomenon of degluing, and then the strength of plywood will also be reduced; The hot pressure temperature is too high is not allowed, the temperature is too high, the hot-press use of hot melt will be as well as dissolved, is coated with the plastic layer thinning. Those wood less poor plate, will also with the temperature rise of some deformation, reduce the hardness and strength of the plate itself.
Therefore, in the process of the actual hot pressure of plywood, the appropriate temperature range should be determined according to the tree species, wood characteristics and the type of hot melt. Reasonable control of thermal pressure temperature can control the evaporative slab moisture, reduce the moisture content of the plate, can control the water content of the single plate in the range of 8 to 12%, to achieve the best water content, reduce the incidence of bubbly and local degluing. Reasonable control of thermal pressure temperature can also increase the plasticity of wood, to promote wood compact.
