Drying Characteristics and Drying Schedule Establishment of Birch Impregnated with Urea-formaldehyde Resin
The drying characteristics of European birch impregnated with urea-formaldehyde were determined and an-alyzed using the 100℃test,and a preliminary drying schedule was established.The results showed that the initial cracks,cross-sectional deformation and distortion of European birch resin impregnated timber are 12.1%,52.9%and 40%lower than untreated European birch.The shrinkage rate of resin impregnated material is significantly lower than untreated Birch,and the differential shrinkage ratio is slightly larger than untreated birch.The resin impregnated material whose moisture content drops from 30%to 5%takes almost twice the time of the untreated Birch.According to the relevant data of drying characteristics,the reference drying schedule of European birch resin impregnated wood is given.
European brichresin impregnationdrying characteristicsdrying schedule
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