Effect of Blending Method on the Mechanical Properties of Wood-Plastic Composites

• Main Authors: M. Chaharmahali, S. Kazemi Najafi, M. Tajvidi
• Format: Article
• Language: fas
• Published: Iran Polymer and Petrochemical Institute 2007-10-01
• Series: علوم و تکنولوژی پلیمر
• Subjects: wood-plastic composite; MDF; Mechanical Properties; melt blend; dry blend
• Online Access: http://jips.ippi.ac.ir/article_785_028193c26985321f3791d48b59a5c932.pdf

In this study, the possibility of producing wood-plastic panels was studied using two different blending methods including melt blend and dry blend. Wood-plastic panels were made from recycled high density polyethylene (as resin) and MDF waste (as natural fiber) at 60, 70 and 80% by weight filler loading. Nominal density and dimensions of the panels were 1g/cm3 and 35×35×1 cm, respectively. The mechanical properties of the panels including flexural elastic modulus, flexural strength, screw and nail withdrawal resistance, and impact strength were studied. Maximum values of flexural modulus of wood-plastic panels were found at 70% fiber content in both methods. Flexural strength, screw and nail withdrawal resistance and impact strength of wood-plastic composites reduced with the increase in fiber content from 60% to 80%. Mechanical properties of samples made with dry blend method were generally higher than those of samples made with melt blend method for all corresponding formulations.