Abstract
Low-density sandwich panels consisting of an oil palm wood core overlaid with a rubberwood veneer face were manufactured. Effects of two types of grain orientation of the oil palm wood core (parallel and perpendicular to board surface) and three different veneer thicknesses (0.7, 1.8 and 2.7 mm) and core densities (223 ± 14, 301 ± 35 and 418 ± 33 kg/m3) on some physical and mechanical properties of the boards were investigated. Results showed that higher core density increased the values of thermal conductivity, screw withdrawal resistance, modulus of rupture and modulus of elasticity but decreased the value of water absorption without effect on thickness swelling of the boards. Boards with the core grain direction oriented perpendicular to panel’s surface possessed lower value of thickness swelling but higher values of thermal conductivity and strain at fracture when the board failed in a mode of core shear under bending test than those of the others. Finally, the relationship between board density and the measured physical and mechanical properties of the oil palm wood core sandwich panels overlaid with a rubberwood veneer expressed as mathematical equations could be used to predict and design the expected properties of this type of sandwich board.
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Acknowledgments
The authors gratefully acknowledge the Thailand Research Fund through the Royal Golden Jubilee Ph.D. Program (Grant No.PHD/0065/2552) for the financial support, Phang-Nga Timber Industries Co., Ltd., Phang-Nga, Thailand for providing the raw materials and facilities for the experimental work and Dynea Krabi Co., Ltd., Songkhla, Thailand for providing MUF adhesives used in this work.
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Srivaro, S., Matan, N., Chaowana, P. et al. Investigation of physical and mechanical properties of oil palm wood core sandwich panels overlaid with a rubberwood veneer face. Eur. J. Wood Prod. 72, 571–581 (2014). https://doi.org/10.1007/s00107-014-0817-5
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DOI: https://doi.org/10.1007/s00107-014-0817-5