Invasive Species Compendium

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Abstract

Properties of bark-wood particle composite board.

Abstract

Bark-wood particle composite boards were manufactured to determine the effects of bark on properties of boards that contain small-diameter wood and branchwood (and hence, some bark). The bending properties of sugi (Cryptomeria japonica) particleboard increased linearly with increasing specific gravity. However, the effect of a large compaction ratio was observed on internal bond strength (IB) and thickness swelling. No differences were observed between these and particleboards containing 25% bark made from sugi and hinoki (Chamaecyparis obtusa). Thermal conductivity and thickness swelling showed a linear change with the variation in bark content. Equations predicting the bending stiffness and strength, and the IB strength of bark-wood particle composite board are proposed, and the law of mixtures of this composite is discussed. It was concluded that the tolerable limit of bark substitution for particleboard in practice could be about 35%.