Recycled high-density polyethylene reinforced with bamboo filler were compounded with twin-screw extruder and injection molding process. The main objective of this study is to investigate the effect of different chemical treatment with different concentration for bamboo filler reinforced with recycled high-density polyethylene composites via injection molding. The fillers were reinforced with plastic for different concentration of sodium hydroxide and acetic acid at 2.5 %, 5.0 % and 7.5 %. Mechanical measurements will show the presence of different chemical treatment with different concentration insignificantly effect in the composites tensile properties and also impact properties. The result of the mechanical analysis carried out showed that the presence of natural filler in composites will improve the properties of the material.
