Basic properties of parallel strand lumber from oil palm trunk wastes (Elaeis guineensis Jacq.) bonded by isocyanate adhesive

Abstract

This research was conducted to produce high quality Parallel Strand Lumber (PSL) made from oil palm trunk waste bonded by isocyanate adhesive. The basic properties tested were the physical properties (moisture content, density, volume shrinkage) and mechanical properties (Modulus of Elasticity (MOE) and Modulus of Rupture (MOR)). The thicknesses of long strand were 0.3 cm and 0.6 cm, while the widths were 2 cm, 4 cm, and 6 cm. Based on the statistical analysis using anova assessment, the width of long strands influence significantly volume shrinkage, MOE and MOR. Meanwhile, the long strand thickness affected significantly MOE and MOR. The PSL moisture contents were 10.73 to 11.95%. The densities were 0.62 to 0.63 g/cm3.The volume shrinkages were 1.18 to 1.98%. The PSL MOEs were 1.75 x 104 to 2.6 x 104 kg/cm2 and the MORs were 117 to 246 kg/cm2. In general, PSL made from oil palm trunk waste failed to meet the minimum requirement set forth by JAS 1152 (2007).