Abstract
The report describes the use of adhesive made from merbau wood extract ( Intsia Spp . ) which is allowed to copolymerize with resorcinol, formaldehyde under alkaline conditions, and tapioca as an extender. The adhesive was used to manufacture three-ply composite board consisting of a back and core layers made from sengon ( Falcataria mollucana ), and jabon ( Anthocephalus chinensis ), while the face layer was made either one of three bamboo species, namely, andong ( Gigantochloa pseudoarundinacea ), mayan ( Gigantochloa robusta Kurz. ), and bitung ( Dendrocalamus asper Schult. F .). Result shows that physical-mechanical properties of the composite board with using adhesive by formula (% of weight ratio) Merbau extract : Resorcinol 50% : Formaldehyde 37% : Extender = 100 : 10 : 10 : 5) were similar with to those of products made of synthetic phenolic adhesive and classified as an exterior quality type with E0 or F**** types of low formaldehyde emission.
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