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PEER-REVIEWED ARTICLE
Utilization of Waste Polyethylene and its Effects on Physical and Mechanical Properties of Oriented Strand Board Huseyin Yorur The effect of adding waste polyethylene (WPE) was investigated at various ratios on some physical and mechanical properties of oriented strand board (OSB) panels. All of the test panels were bonded with 6% phenol- formaldehyde resin in three layers. The manufacturing parameters was 0/100, 10/90, 20/80, 30/70, 40/60, and 50/50 by weight% of WPE/wood strand. All the boards were manufactured to achieve targeted specific gravity of 0.65 g/cm 3 . Polyethylene improved the water resistance of the OSB panels because of its hydrophobicity. Based on the results of this study, thickness swelling, humidity, dimensional stability, water absorption, and screw withdrawal resistance of the samples were improved significantly. However, MOE, MOR, and internal bond strength values of the samples decreased with increasing WPE in the panels when compared to the control panels but met minimum requirements in EN 300 (type 1-2- 3-4) control panels. The conclusion was reached that waste polyethylene can be used in the manufacture of OSB panels, resulting in the enhancement of above mentioned physical and mechanical properties, as well as a safe disposal and economical utilization. Keywords: Oriented strand boards; Wood composite; Waste polyethylene; Physical and mechanical properties; Screw withdrawal; Internal bond; Water absorption; Dimensional change Contact information: Department of Forest Industry, Forest Faculty, Karabuk University, Karabuk, Turkey; huseyinyorur@karabuk.edu.tr INTRODUCTION Wood composite materials such as plywood, fiberboard, particleboard, and oriented strandboard (OSB) are commonly utilized for various applications in the construction industry (Howard 2000; Hu 2000). Oriented strandboard is a material that is manufactured from thin wood strands bonded together with water-resistant adhesive under heat and pressure (Cai and Ross 2010). Main applications in Turkey include roofs and walls, I- beams, wood and steel construction systems, coatings, and chest for transportation of materials, etc . Because of rapid industrialization and technological development, especially in some developing countries, environmental pollution problems and a shortage of natural resources have occurred. Various types of polyethylene are industrial products that produce a large quantity of waste materials every year (Tayyar and Ustun 2010). Polyethylene (PE) is the most commonly used plastic in the world. Depending on its density, PE can be produced in various viscosity levels because of its low melting temperature, typically between 106 and 130 °C. Additionally, polyethylene is a soft material that enables PE- based composite boards to be nailed, screwed, cut easily, and it shows near-zero moisture absorption (approximately below 0.02% after 24 h of underwater immersion) (Klyosov 2007).
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Yorur (2016 ). “Waste PE and effects on OSB,” B io R esources 11(1), 2483-2491.
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