Proceedings e report - Firenze University Press

UTILIZATION OF POMEGRANATE WOOD FOR PARTICLEBOARD PRODUCTION
IB is created in the particleboards. However, all averages of IB of the manufactured particleboards
were higher than standard (Fig. 3).
MOE
IB
Fig. 2-Mutual effects of wood composition on MOE
Fig. 3-Mutual effects of resin content and press time on internal bonding
The results related to the effect of variable factors on 2- and 24-hour TS too showed that increase in
resin content on the surface statistically would decrease TS (Fig. 4). This decrease is mainly due to
more IB of the boards because of more connection resistance between the wood particles which
resulted from the higher amount of resin particles. Clearly, when the IB of the boards is increased, the
TS of the boards will improve and will decrease. On the other hand, increase of the press time from 4
minutes to 5 minutes has caused more 2-and 24-hour TS of the boards. This can be result of the
destructive effect of heat on resin connections during elongated press time.
Fig. 4-Mutual effects of wood combination on thickness swelling: (left) TS24h; (right) TS2h
The results of this study also shows that when the percentage of poplar wood in the wood combination
of the particleboard is increased, the 2and 24-hour TS are increased and maximum TS is when the
wood combination is purely poplar wood (100%). The reason is that the pomegranate wood has higher
328