Abstract
A full-factorial experimental design was used to investigate the effects of three factors on UF resin efficiency. Within the limits of this study, the three factors, namely, resin content loss, resin coverage level and resin pre-cure time for mechanical blended MDF fibres were found to have significant effects on resin efficiency as evaluated by the internal bond strength (IB) of the panels. The most significant factor was resin content loss followed by resin coverage level and resin pre-cure. The resin coverage level had a positive effect on resin efficiency, while the resin content loss, resin pre-cure time at 40 °C conditions, the interactions of resin coverage level and resin content loss as well as resin coverage level with pre-cure had negative effects on resin efficiency. For a given resin content, the resin efficiency could be increased by 35% by increasing the level of resin coverage. The resin efficiency obviously decreased with resin content loss and pre-cure time.
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