In production of wood-plastic composites (WPCs), types of natural wood is a factor affecting the
properties of WPCs. Because each type of wood has the different structure and strength, therefore, the
objectives of this research were to study the effect of natural wood types, such as rubberwood flour
(RW), oil palm wood flour (OW) and oil palm frond flour (OF), as well as effect of pigment contents
on mechanical and physical properties of composites from high-density polyethylene (HDPE) and wood
flour. From testing the composites without pigment, the HDPE composites reinforced with RW had
higher modulus of rupture (MOR), modulus of elasticity (MOE), tensile strength (TS), tensile modulus
(TM) and hardness than the composites reinforced with OW and reinforced with OF. Likewise, the
HDPE composites reinforced with OF showed greater all mechanical properties than the composites
reinforced with OW. Furthermore, addition of pigment 1 wt% clearly improved the MOR, MOE and
hardness of all the composites. However, addition of pigment 5 wt% reduced the TS and hardness of
the WPCs. Lastly, the composites reinforced with RW exhibited brown texture, while the composites
reinforced with OW appeared dark brown texture, and texture of the composites with OF is black.