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以桉木为基材,通过聚乙烯膜进行胶粘,采用热压-冷压工艺制备三层木塑复合材料,并且利用极差方差分析研究了热压温度、热压时间、热压压力和聚乙烯膜用量对材料胶合强度、静曲强度和弹性模量的影响,探索出三层木塑复合材料的最优制备工艺。结果表明:巨尾桉/聚乙烯膜制备复合材料的最佳工艺配比是热压温度160℃,聚乙烯膜用量119g/m2,热压时间50s/mm,热压压力0.7MPa;利用该工艺制备的板材符合GB/T 9846-2004II类胶合板的标准。实验研究为人工林桉木的高附加值利用提供一定的参考数据和理论支撑。
Using eucalyptus as substrate, the three-layer wood-plastic composites were prepared by hot-pressing and cold-pressing through the polyethylene film. The difference of temperature, hot-pressing time, hot-pressing pressure and Polyethylene film dosage on the bonding strength, bending strength and elastic modulus, explored the optimal preparation process of three-layer WPC. The results showed that the optimal ratio of preparation process of Eucalyptus urophylla / polyethylene film was 160 ℃ in hot pressing temperature, 119g / m2 in polyethylene film, hot press time was 50s / mm and hot press pressure was 0.7MPa. The prepared plate complies with GB / T 9846-2004 class II plywood standards. The experimental study provided certain reference data and theoretical support for the high value-added utilization of plantation eucalyptus.