This study investigates the mechanical properties of high impact polypropylene
composite reinforced with pineapple leaf fibre from the Josapine cultivar as a function of
fibre loading. PLF was extracted by using a pineapple leaf fibre machine and then an
alkaline treatment was conducted to enhance the properties. Samples of the composite
were fabricated with 100 mm fibre length with five different fibre loadings of PLF (30,
40, 50, 60 and 70 wt%). The fabrication was made by a compression moulding technique
with unidirectional fibre orientation. Related tests such as tensile, hardness and density
tests were conducted to determine the effect of fibre loading. The experimental data
showed that the composite with the 60 wt% fibre loading offered the highest value of
tensile strength, which was about 309%, and the Young’s modulus was about 540%
compared to 0 wt% of PLF loading. Meanwhile, the hardness and density of the PLF/PP
composites showed very similar values, with small increments from 30 wt% up to 70 wt%
PLF loading compared to 0 wt% of PLF loading. The highest values are 65.38 Shore-D
and 1.002 g/cm³ respectively. The results also revealed that PLF from the Josapine
cultivar with alkaline treatment greatly influences the mechanical properties of PLF/PP
composite