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Official Journal of the Japan Wood Research Society

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Effect of particle shape on linear expansion of particleboard

Abstract

Hinoki (Japanese cypress) strand with 0.6mm thickness was hammer-milled to prepare three types of particles that had the same thickness but different lengths and widths. Screen analysis and image analysis were conducted to evaluate the shape and distribution of the particle dimensions. Laboratory-scale particleboards were fabricated at three density levels using these particles. To determine the true effect of particle shape on the linear expansion (LE) of the board, these boards exhibited almost the same temperature behavior during pressing, the same density profile, and the same bending properties at each board density level. LE at 40°C and 90% relative humidity of the board was found to be affected by the particle shape. The board composed of small particles showed a larger LE at the same density level. It was considered that the out-of-plane orientation angle of the particles affected the LE of the boards. Thickness swelling and internal bond strength were also affected by the particle shape.

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Correspondence to Shigehiko Suzuki.

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Miyamoto, K., Nakahara, S. & Suzuki, S. Effect of particle shape on linear expansion of particleboard. J Wood Sci 48, 185–190 (2002). https://doi.org/10.1007/BF00771365

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  • DOI: https://doi.org/10.1007/BF00771365

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