Swelling and Creep of Isocyanate-Bonded Oriented-Particle Board

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This paper reports swelling, bending strength, and creep of Isocyanate(ls)bonded oriented-particleboard(face: orlented, core: random), which is compared with Phenol-formaldehyde(PF) bonded and Urea-formaldehyde(UF) bonded oriented-particleboards.Test results are summarized as follows:1) The orientation of flakes greatly reduces linear expansion along the oriented dlreCtion, but the thickness swelling of oriented board is almost equal to that of random-orientedboard.2) ls-bonded particleboard has almost the same bending properties as UF and PF-bondedparticle boards, provided they are less　in　resin　content.3) Creep of ls-bonded board is smaller than that of vinyl-polymer isocyanate(VPIs) bonded board and is the same in magnitude as that of UF-and PF-bonded boards. The orientation of face particles reduces relative creep 30-50 percent.4) clearly, Creep denection under a cyclic load is larger than that under a constant　load.
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