Potential of using recycled low-density polyethylene in wood composites board

Abstract

The aim of this study was to investigate the suitability of using recycled low density polyethylene (RLDPE) in wood board manufacturing. The composite board was produced by compressive moulding by increasing the percentage of LDPE from 30 to 50 wt% with interval of 10 wt% at a temperatures of 140 and 180°C, pressure of 30 to 40 Kg/cm² and pressing time 7 to 13 min. The microstructure and mechanical properties: Modulus of rupture (MOR), modulus of elasticity (MOE), tensile strength, impact strength properties of boards were determined. The results showed that high modulus of rupture of 20.31 N/mm² and MOE of 1363 N/mm² were obtained from board produced at 140°C, 60/40 wt% wood particles per LDPE content. The uniform distribution of particles and the recycled LDPE in the microstructure of composites board are the major factor responsible for the improvement in the mechanical properties. The results showed that the MOE and MOR meet the minimum requirements of the European standards, for general purpose. The boards produced had tensile strength that is within the requirement. Hence this LDPE can be used in board production for general purpose applications.

Keywords: Microstructure, polyethylene, physical and mechanical properties.