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Resin Impregnation of Sawdust Board for Making Woodceramics(II) - Effect of Density and Addition Rate of Phenol Formaldehyde Resin -  

Oh, Seung Won (College of Agriculture & Life Science, Research Institute of Bioindustry, Chonbuk National University)
Byeon, Hee Seop (College of Agriculture & Life Science, Institute of Agriculture & Life Science, Gyeongsang National University)
Publication Information
Journal of the Korean Wood Science and Technology / v.31, no.5, 2003 , pp. 15-22 More about this Journal
Abstract
This study was carried out to investigate the properties of sawdust board impregnated with phenol resin according to the density and resin content of board. The sawdust board were manufactured to target densities of 0.4, 0.5, 0.6, 0.7 g/cm3 and resin content of 5, 10, 15, 20% made from Pinus densiflora S. et Z., Larix. kaemferi C. and Pinus koraiensis S. et Z. The impregnation process were executed in two ways, the application of vacuum pressure then followed by atmospheric pressure, and the application of vacuum pressure with ultrasonic vibration then followed by atmospheric pressure. The density of impregnated sawdust board increased as density and resin content of sawdust board increased, but impregnation rate decreased. The density, impregnation rate, bending strength and brinell hardness of sawdust board in impregnated vacuum pressure with ultrasonic vibration then nonpressure were higher than those of vacuum pressure then nonpressure. In this results, the impregnation rate is increased in vacuum pressure with ultrasonic vibration then nonpressure, it has affected the properties of sawdust board impregnated with phenol resin.
Keywords
Sawdust board; phenol resin; impregnation; bending strength;
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