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 discussed in this research, analyzing the effects of hotpressing temperature, hotpressing time and glue spread amount 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 properties 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 513513MPa, 6994 MPa and 575957MPa, 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 amount 280g/m2, MOE⊥ and MOR⊥ reached a maximum, while glue spread amount was 240g/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0min/mm, glue spread amount 240g/m2.