The present invention relates to a polypropylene-kenaf composite material including a kenaf fiber as a filler, wherein all properties are improved, such as a mechanical strength, an impact strength, a flexural modulus, etc., and a superior characteristic in lightening and scratch resistance is shown, by specifically configuring a polypropylene material composition, in comparison with a composite material including an existing kenaf fiber as a filler, and a processability of the composite material is improved, such as minimizing a bambooing of a molten material when peforming an extrusion molding, by reinforcing an interfacial adhesion between the kenaf fiber and the polypropylene resin. The present invention relates to the polypropylene-kenaf composite material including 5-40 parts by weight of kenaf fiber as a filler with reference with respect to 100 parts by weight of polypropylene material, wherein the polypropylene material comprises: (A) 50-90 wt % of polypropylene copolymer mixture in which homo polypropylene and block polypropylene have a weight ratio of 1:9-9:1; (B) 5-45 wt % of one or more kinds of rubber elastomers which are selected from the group consisting of ethylene-octene, ethylene-butylene, and styrene-ethylene/butylene-styrene; (C) 1-4 wt % of polypropylene in which maleic anhydride is grafted; (D) 1-5 wt % of processed lubricant mixture in which metaacrylate-acrylate copolymer and acryl-modified polytetrafluoroethylene have a weight ratio of 1:9-9:1; and (E) 0.1-3 wt % of slip agent mixture in which siloxane group slip agent and amide group slip agent have a weight ratio of 1:9-9:1.;COPYRIGHT KIPO 2015
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