Abstract
The physical parameters, such as steady state and unsteady state diffusion coefficients, of moisture movement in particleboard are very important for modelling the moisture movement process and preventing the deformation of particleboards. The methods of determination of steady state and unsteady state diffusion coefficients were studied and the results of those determined coefficients obtained. The results demonstrated that the steady state diffusion coefficients parallel to panel surface were 10–20 times as large as those perpendicular to panel surface and unsteady state diffusion coefficients parallel were 3–5 times as large as those perpendicular to panel surface in test particle-boards. This was due to the orientation of chips in the particle-boards.
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