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Abstract: The objective of this study was to investigate the use of the needle litter of Pinus pinaster Ait. in manufacturing three-layer particleboard. Physical (thickness swelling) and mechanical properties (modulus of rupture, modulus of elasticity, and internal bond strength) of the panels were determined according to the procedure of EN standards. Effects of needle litter collection time, and usage on the properties of particleboard made from Eucalyptus globulus Labill. wood were investigated. While the needle litter usage decreased the mechanical properties, thickness swelling of the panels was improved, significantly. The needle litter collection time was found to be effective on all properties of the particleboard. Based on the findings of this study, it appears that three-layer particleboard can be manufactured from the needle litter of P. pinaster Ait. [Copyright &y& Elsevier]

Abstract: The purpose of this study was to investigate the usage of kenaf (Hibiscus cannabinus L.) stalks as a raw material for particleboard manufacturing. The parameters affecting particleboard manufacturing from kenaf were determined to be press temperature, and time, pressure, density and shelling ratio. The experimental results showed that the parameters were found to be effective on the physical (thickness swelling) and mechanical (modulus of rupture, and internal bond strength) properties with the exception of pressure, significantly. It appears that kenaf can be used to manufacture particleboard. [Copyright &y& Elsevier]

In this study, influence of impregnating wood particles with mimosa bark extract on the some properties of particleboard was investigated. Properties evaluated were modulus of rupture (MOR), modulus of elasticity (MOE), internal bond (IB), thickness swelling (TS), and formaldehyde emission (FE). The results showed that particleboards made from particles impregnated with mimosa bark extract had significantly lower mechanical, physical and formaldehyde emission values than those of the boards made from unimpregnated particles. Brushing of mimosa bark extract to the surfaces and edges of the particleboards did not affect the mechanical properties, statistically. However, this application caused a significant improvement in the thickness swelling and formaldehyde emission. [Copyright &y& Elsevier]

The aim of this study was to investigate the suitability of kiwi prunings as a raw material for particleboard manufacturing. The kiwi is a new cultivation in the East Black Sea Region of Turkey. Kiwi pruning particles and industrial wood particles in various proportions were used as the raw material for the core and surface layers of the three-layer particleboard. Commercial urea formaldehyde (UF) adhesive was used as a binder. Anatomical descriptions, chemical properties (holocellulose, cellulose, lignin and ash contents, alcohol–benzene, hot and cold water solubility, solubility in dilute alkali (1% NaOH)) and basic characteristics of the kiwi stalks (density, weight proportion of bark, core and pith), physical (thickness swelling (TS), water absorption (WA)), and mechanical (modulus of rupture (MOR), modulus of elasticity (MOE), internal bond (IB)) properties of particleboards were determined. The results showed that kiwi stalks had higher fiber length, width and wall thickness values than the wood of common forest species. They had higher solubility values, lignin and ash contents than those of the other plants. Increasing of kiwi pruning particles usage in the core negatively affects the board properties. Containing up to 50% kiwi pruning particles in the core, the MOR exceed the minimum requirements of the European standards, for general purpose. All of the particleboards produced from kiwi prunings had IB higher than the requirement. The WA and TS values were very high (poor). [Copyright &y& Elsevier]