杨木PF树脂浸渍工艺的响应面分析

Response surface analysis on impregnation technology of poplar with PF resin

采用响应面Box-Benhnken中心组合试验设计与分析方法,对PF树脂浸渍杨木单板的工艺因素进行了分析,建立了浸渍工艺因素与单板增重率之间关系的二次回归模型。方差分析表明,二次回归模型高度显著,计算值与实际值之间的误差很小。抽真空时间、胶液浓度和常压浸渍时间对单板增重率具有高度显著的影响,上述因素的交互项对单板增重率影响很小。RSA得到的优化工艺参数为抽真空时间为20 min,胶液浓度为28%,常压浸渍时间为3.0 h,以上述工艺参数进行重复验证试验,试验结果与二次回归模型的计算结果误差很小,表明二次回归模型的预测是可靠的。

Abstraet： The technology factors, which affect the impregnation result of PF resin into poplar veneer, were investigated through the response surface Box-Benhnken centre combination tests, and the quadratic regression model, on the relationship between impregnation technology factors and weight gain rate of veneers, was established. The variance analysis results show that the quadratic regression model was highly significant, the errors between calculated value and actual value was very small, and the pump-down time, concentration of resin and impregnation time in ordinary pressure significantly affected the weight gain rate of the veneers, but the interactive items as above factors had scarcely any effects to the weight gain rate of veneers. The optimized technology factors through RSA were： vacuumizing time 20 min, concentration of resin 28%, and impregnation time in ordinary pressure 3.0 hours which were tested repeatedly for confirmation. The findings show that there was very small error between the calculated value by quadratic regression model and the test value. Key words： poplar veneer; PF resin; response surface; weight gain rate