为提高废旧利乐包的再利用效率,扩大其在包装领域的应用范围,研究了废旧利乐包 / 木屑复合板制备的热压优化工艺。 采用正交试验法,以施胶量、热压温度、热压时间、利乐包与木屑质量比为影响因素,分别以静曲强度、弹性模量和 2 h 吸水厚度膨胀率为检测指标,得到了此种复合板热压优化工艺参数。 结果表明板材热压优化工艺参数为:施胶量 14% ,热压温度 150 ℃ ,热压时间 420 s,利乐包与木屑质比比 4 : 6,在此条件下,板材最大静曲强度为 23. 1 MPa,最大弹性模量为 2917 MPa,2 h 吸水厚度膨胀率最小,为 6. 1% 。

To improve recycling efficiency of waste Tetra Pak package and enlarge its application in packaging field, the optimum hot-pressing process of waste Tetra Pak / wood composite board was studied. Orthogonal experimental method was applied in the study. Resin content, hot-pressing temperature, hot-pressing time, and Tetra Pak / sawdust mass ratio were taken as influencing factors; MOR, MOE, and expending rate after 2 h water absorption was taken as inspection index. The optimum hot-pressing process parameters were obtained from the experiments. The results showed the optimal process parameters for the board were resin content for 14% , hot-pressing temperature 150 ℃ , hot-pressing time 420 s, and Tetra Pak / sawdust mass ratio 4 : 6; under this condition, the maximum MOR of the board is 23. 1 MPa; the maximum MOE is 2917 MPa; and the minimum expending rate of the board after 2 h water absorption is 6. 1% .