Decay-resistance of particleboard.

概要

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Decay-resistance of several commercial particleboards (boards) was investigated using various wood-deteriorating fungi. And also, the effect of fungi on the bending strength of boards was examined.<BR>The weight loss of boards varied with fungal species. A brown rot fungus Tyromyces palustris caused a large weight loss of urea-melamine boards, but did not caused the decay of phenol boards. A white rot fungus Coriolus versicolor caused larger weight loss of some phenol boards than that of all urea-melamine boards. The boards had generally high decay-resistance when they were evaluatd according to the weight loss caused by fungi. The bending strength of boards decereased rapidly with the increase of weight loss. There was no difference between the strength reduction of urea-melamine and phenol boards at the same weight loss. The weight loss of boards by micro-fungi was small. However, a soft rot fungus Chaetomium.globosum produced many cavities into the wood particle in boards. All microfungi used caused a some extent of bending strength reduction. Therefore, the attack of microfungi is also considered to be imortant for use of boards.<BR>Taking these result, some tehnical process should be developed to give a higher decay resistnce of structual boards.
公益社団法人日本木材保存協会の論文