不同因素对耐盐竹柳单板层积材性能的影响

对速生耐盐竹柳制造的单板层积材的可行性进行研究，分析了热压温度、热压时间及涂胶量对竹柳LVL物理力学性能的影响。结果表明，速生耐盐竹柳制造LVL是可行的；随着热压温度的升高，竹柳LVL的力学性能有所提高，当温度达到150℃时，板材在垂直加载条件下的弹性模量（MOE⊥）、静曲强度（MOR⊥）和水平加载条件下的弹性模量（MOE∥）、静曲强度（MOR∥）开始下降，24 h吸水厚度膨胀率（TS）则随热压温度的增高而增加，变化范围为5.05％～5.92％；当热压时间为1.0 min／mm，竹柳LVL板材的MOE⊥、MOR⊥和MOE∥、MOR∥值达到最大，分别为5135.13、69.94 MPa和5759.57、69.54 MPa，TS随热压时间延长呈现先增大后减小的趋势，变化幅度不是很大；随涂胶量的增加，竹柳LVL的MOE⊥、MOR⊥和MOE∥、MOR∥均有不同程度的提高，在涂胶量为280 g／m2时，MOE⊥和MOR⊥达到最大，而MOE∥和MOR∥则在涂胶量为240 g／m2时达到最大， TS当涂胶量为240 g／m2时最小。在试验研究范围内，建议工艺条件为，热压温度135℃，热压时间1.0 min／mm；单面涂胶量240 g／m2。

The Effect of Different Factors on the Properties of Salix discolor LVL

The feasibility study of laminated veneer lumber（LVL）manufacturing from Salix discolor was dis-cussed in this research,analyzing the effects of hot-pressing temperature,hot-pressing time and glue spread a-mount on the physical-mechanical properties of Salix discolor LVL.The results showed that the manufacturing of Salix discolor LVL is feasible.Along with the increment of the hot-pressing temperature,the mechanical proper-ties of Salix discolor LVL were improved,but when the temperature reached 150 ℃,the MOE⊥,MOR⊥ and MOE∥,MOR∥ began to decrease.TS was increased correspondingly as the hot-pressing temperature increases, changed in the range of 5.05%-5.92%.When the hot-pressing time was 1.0 min/mm,the MOE⊥,MOR⊥and MOE∥,MOR∥ of Salix discolor LVL reached to a maximum,with the value of 5 135.13 MPa,69.94 MPa and 5 759.57 MPa,69.54 MPa,respectively.As the extension of hot-pressing time,TS showed a trend of the first increase and then decrease,but the range of change was not large.With the increase of glue spread amount, the MOE⊥,MOR⊥ and MOE∥,MOR∥ of Salix discolor LVL had different degrees of increase,glue spread a-mount 280 g/m2 ,MOE⊥ and MOR⊥ reached a maximum,while glue spread amount was 240 g/m2 ,MOE∥, MOR∥ reached the maximum and TS had a minimum value.In the range of experimental study,the proposed technological parameters were：hot-pressing temperature 135 ℃,hot-pressing time 1.0 min/mm,glue spread a-mount 240 g/m2 .