Properties of plywood manufactured from compressed veneer as building material

Published Date
Materials & Design
April 2009, Vol.30(4):947–953, doi:10.1016/j.matdes.2008.07.001

Author 

• Pavlo Bekhta ^a,
• Salim Hiziroglu ^b,,
• Oleg Shepelyuk ^a,

• aNational University of Forestry and Wood Technology of Ukraine, Department of Wood-Based Composites, Lviv 79057, Ukraine
• bOklahoma State University, Department of Natural Resource Ecology and Management, Stillwater, OK 74078-6013, USA

Received 24 April 2008. Accepted 1 July 2008. Available online 5 July 2008. 

Abstract

The objective of this study is to evaluate some of the physical and mechanical properties of plywood manufactured from compressed veneer of birch (Betula pubescens) and alder (Alnus glutinosa) using a cold rolling process. Surface roughness, tensile strength parallel and perpendicular-to-grain orientation of veneer sheets before and after compression process were tested. Shear strength, bending strength, and compression strength of the plywood samples made from both compressed and non-compressed veneers were also determined. Based on the results of the study, overall mechanical properties of veneer and plywood improved as compression degree veneer increased from 5% to 15%. This also resulted in less adhesive consumption up to 20% as well as enhanced surface characteristics of veneer samples by 40%. Plywood samples required lower pressure ranging from 25% to 30% for those manufactured from regular veneer. It appears that veneer compression process can be considered as an alternative method to improve both physical and mechanical properties of experimental plywood panels which can be used for building applications.

Keywords

Veneer compression

Cold rolling

Strength properties

Roughness

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