Some Characteristics of Particleboards from Four Tropical Hardwoods of Central America

The bending strength (MOR) of three flake-type particle-boards from Central American hardwoods varied from 6000-6800 psi as compared to 5200 psi for an aspen control. The boards were produced at a density of 48 lbs./cu.ft. with a urea formaldehyde resin content of 8 percent resin solids. A fourth tropical species was found unsuitable for flaking so a splinter-type board was produced which was somewhat inferior to the other tropical boards but about equal in strength to the aspen board. A board type was produced from a combination of species and found to be equal in properties, except thickness swelling, to the single species products. Weight losses of particleboard samples of the various board varied from 3 to 56 percent when subjected to two fungi for 3 months in a soil block test.

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