Influence of dependent variables on the mechanical properties of oriented particleboards
2006
Honda, T.(Yamanashi-ken. Forest Research Inst. (Japan))
The oriented particleboard was producted from the karamatu particle of cutting with the knife ring-flaker. Production factor such as specific gravities, layer construction and form of the particle relation of mechanical properties of particleboard was examined. The modulus of elasticity (MOE) along the aligned direction of the single-directionally oriented board was over twice as large as random board. But the MOE perpendicular to the orient direction was less than one-third of the MOE parallel to this direction. The single-directionally oriented board indicates the same anisotropic property of elasticity as the solid wood. To improve the perpendicular MOE, three crossoriented ply board, and surface oriented and core random-oriented board were prepared. The perpendicular MOE of these boards were larger than that of the single-directionally oriented board. The veneer overlaid boards produced a good performance for the MOE along the face grain. However, these boards remarkable showed the elastic anisotropy. As particle are pressed strongly in order to raise the board density, it favor improvement of the MOE, but some brittleness in particle quality may occur. These results are useful for the utilization of low-quality karamatu chips.
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