Effects of the Size of Wood Flour on Mechanical Properties of Wood-Plastic Composites

In this article, wood-plastic composites(WPCs) were manufactured with wood flour(80 similar to 120mesh, 40 similar to 80mesh, 20 similar to 40mesh, 10 similar to 20mesh) combing with high density polyethylene(HDPE). Effects of the size of wood flour on mechanical properies and density of composites were investigated. Results showed that particle size of wood flour had an important effect on properitiesof WPCs. Change of mesh number had a outstanding effect on flexural modulus, tensile modulus and impact strength, howere, little effect on flexural strength and tensile strength. When mesh number of wood flour changed from 80 similar to 120mesh to 10 similar to 20mesh,flexural modulus and tensile modulus were respectively enhanced by 42.4% and 28.4%, respectively, and impact strength was decreased by 35.5%.Size of wood flour basically had no effect on density of composite within 10 similar to 120mesh.