Effect of Temperature and Humidity on Toughness of Three Structural Particleboards

To verify environmental/impact strength relationships for structural particleboards the effect of environmental conditions on the toughness of three commercially produced structural particleboards was studied. Variables examined were temperature, relative humidity, and board type. A three-layer, a three-ply oriented particleboard, and a graded density planer shavings/ residue particleboard were evaluated. Toughness was evaluated by the use of a modified FPL Toughness Tester. Generally the toughness of these particleboards increased linearly with both increasing temperature and increasing moisture content. However, boards of different types behaved quite differently in terms of sensitivity to environmental change. Temperature and moisture content appear additive in their effect on toughness.

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