Effect of bamboo strand length on oriented strand board

Utilization of non-wood material containing lignocellulose like bamboo Tali could be used for material in the manufacturing of oriented strand board (OSB). This research aimed to evaluate the effect of strand length on OSB quality made from Bamboo Tali. Strand length that used in this research was 5, 10, 15, 20, and 25 cm. The size of the boards. thickness and density target were 25 x 25 cm2, 1 cm, and 0.7 g.cm−3 respectively. OSB was made in three layers with perpendicular strand direction for every layer. The ratio of face/core/back was 1:2:1. The resin used in this research was Isocyanate resin (H3M type) with 5% resin content and 98% solid content to bind the board. After mat-forming. Mat was pressed using hot pressing in 160°C for 5 minutes and 25 kg.cm−2 pressure. The results showed that almost all parameter of physical properties had fulfilled standard except moisture content. Furthermore, overall the parameter of mechanical properties had fulfilled JIS A 5908 standard. The trend of MOR and MOE showed that increasing of strand length caused of increasing those parameters, but the contrary trend occurred on internal bond.