The coir fibers with length of 110-120 mm were obtained from the coconut husks abstracted from the coconut fruits naturally grown in Philippines. Literature values for the chemical properties of the coir fiber are presented in Table 1. The fibers were chopped into 12-15 mm length to ensure easy blending with coco matrix. The chopped fibers were then dried at 100oC for 36 h (Figure 1). The moisture content of the fibers, as determined by oven-dry weight, was found to be 1-2 % prior to the treatment. Virgin Polypropylene (Tm=160oC, ρ=900 kg/m3, MFI/230oC/2.16 kg= 6.5 g/10 min) was used as the coco material. The Polypropylene was processed by a rotary grinder to pass through a US 40-mesh screen and retained on a US 80-mesh screen. The Polypropylene was chosen as the matrix material in this study because of its good balance of property range, low processing temperature, low price, and good thermal stability