Effects of Chip Type on the Properties of Chip-Sawdust Boards Glued with Polymeric Diphenyl Methane Diisocyanate.

This study investigates the effects of chip type and sawdust percentage on physical and mechanical properties of chip-sawdust boards. The used wood chips varied in linear dimensions and original source. The origin determined the wood quality, which translated into the chips' linear dimensions. The used materials were chips from sawmill waste processing, aggregate processing of sawmill wood, and chips intended for medium-density boards. The experiment demonstrated that the best boards in terms of mechanical properties were obtained from 4-mm-thick chips with 30% sawdust content and a density of 850 kg/m3. These boards meet the requirements of the EN 312 (2010) standard for P5 boards.