Komposisi Resin dan Kadar Aditif dalam Perekat Lignin Resolsinol Formaldehida pada Kayu Lamina Kempas

Abstract

This research was aimed to optimize the utilization of lignin obtained from pulp mill. through copolymerization with resorcinol and formaldehyde, hereinafter is called LRF, to be used for laminated wood by cold press. The findings indicated that LRF glue was comparable to the commercial phenol resorcinol formaldehyde resin. Mole ratios of lignin, resorcinol, and formaldehyde were significantly affect gelatination of the glue mix. The optimum composition of lignin :resorcinol :formaldehyde was found to be 1:0.5:2 plus 1.5% paraformaldehyde hardener, based on the weight of the resin content. The glue was suitable to be applied to kempas laminated wood under 15-hours cold press at room temperature. Physical and mechanical properties of the laminated wood met the qualification of commercial structural wood.