To study the possibility of the use of cellulosic fibers as reinforcer in the manufacture of
fiber high-density polyethylene, three kinds of fibers namely; pure alpha cellulose, wood flour, and waste paper fiber were mixed with high density polyethylene at rates of 10, 20, 30 and 40 percent by weight.
Also, maleic acid was added to mixture as a compatibilizer. The results revealed that impact energy, modulus of elasticity and elongation decreased but tensile strength and hardness increased due to addition of cellulosic fibers. The best properties were found in composites that contained alpha cellulose and waste paper fibers, but since the difference between these two kinds wasn't significant and waste paper fibers being cheaper than alpha cellulose, the use of waste paper was suggested in fiber high density polyethylene composites. Two percent by weight maleic acid was suggested as a compatibilizer between polymer and cellulosic fibers
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