The process of making graded particleboard to pre-determined international specifications begins with the selection of timber. The logs of acceptable size are washed, chipped and screened so that chips of acceptable size can be fed into a flaker and reduced to particles. The particles are fed into a dryer and screened again for finer quality. Finer particles and larger particles are separated to make surface and core part of the boards respectively.
The dried particles are blended with resin after which they are spread into a mat in a state-of-the-art wind-sifting machine, whereby the particles are graded and formed into a mat in one operation. By this process, the larger particles are distributed along the center of the board while the smallest particles are distributed across the surface.
This ensures a board with an excellent surface finish and superior mechanical properties. This gives the board a high degree of homogeneity and structural strength and also imparts dimensional stability and mach inability.
The mats are then divided into required lengths before being transported to hot press for pressing. After pressing, the boards are cooled in a star cooler and cut to required sizes and cured for 4 – 6 days before sanding to specific thickness.
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