Effect of Heartwood and Sapwood Ratio on Adhesion Strength of Finished Wood Species

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ADVANCES IN MATERIALS SCIENCE AND ENGINEERING, vol.2015, 2015 (SCI-Expanded) identifier identifier


The objective of this study was to determine adhesion strength of samples from wood species coated with cellulose varnish as function of heartwood and sapwood ratio. Roughness of the specimens from four different species was measured employing stylus type equipment before they were coated with varnish. Pull-off testing unit was employed to determine adhesion strength of the samples. Based on the findings in this work it seems that no significant difference was determined between adhesion strength values of the samples prepared from heartwood and sapwood portions. The highest adhesion strength value of 2.62N/mm(2) was found for the beech samples sanded with 80-grit sand paper. Overall rougher surfaces of the samples resulted in higher adhesion strength between finish and substrate.