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http://dx.doi.org/10.5658/WOOD.2013.41.1.42

A Study on Deflection Characteristics of Plywood for Wood Based Flooring by Veneer Composition  

Pi, Duck-Won (Wood Based Composite Materials Research ChungNam National University)
Kang, Seog Goo (Wood Based Composite Materials Research ChungNam National University)
Publication Information
Journal of the Korean Wood Science and Technology / v.41, no.1, 2013 , pp. 42-50 More about this Journal
Abstract
Since 1990's, a plywood for flooring base has gotten customers' demand. Costs of raw material and production increased because of changed environment of industry. Tropical timber such as Red Meranti (Shorea acuminate) used for raw material of the floor has been depleting beside countries in South Eastern Asia changed species of afforestation. As a result, it gets hard to secure good quality of raw material for plywood. Moreover plywood price is increased suddenly after earthquake in Japan. Eucalyptus (Eucalyptus globulus) in china has been using for raw material as a countermeasure of changed environment of industry. In this study, possibility of using flooring consisted of Eucalyptus veneer as crossband layers was checked by deflection experiments. Flooring consisted of Red Meranti was used for comparison. Two factors which impact on deflection are a type of density gradient and density difference between Long-grain veneer and Short-grain veneer. Red Meranti samples are M type of density gradient on the other hand Eucalyptus samples are W type of density gradient. The more samples have high density difference, the more deformation was checked. A sample which has big density difference between core and cross bands layer warp more also deform. Flooring was deformed smaller than plywood and samples which have big density difference was deformed more.
Keywords
flooring; plywood; density gradient; deflection;
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Times Cited By KSCI : 1  (Citation Analysis)
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