Study on sheet material made from zephyr strands - V: Properties of zephyrstrand board and zephyr strand lumber using the veneer of fast-growing species such as poplar

Zephyr strand board (ZSB) and zephyr strand lumber (ZSL) were produced usin g zephyr made from poplar veneer to investigate the greater utilization of low-density poplar as a structural material. These materials were then comp ared to ordinary plywood, laminated veneer lumber (LVL) from poplar veneer: lauan plywood, and particleboard. The bending properties (moduli of ruptur e and elasticity) of ZSB proved superior to those of poplar plywood and ZSL produced from poplar veneer zephyr had bending properties greater than ord inary LVL from poplar veneer. Apparently, the conversion of the poplar vene er into zephyr material had a positive effect on bending properties. Additi onally, poplar ZSB had bending properties superior to those of lauan partic leboard and equal to those of lauan plywood. The internal bond strength of poplar veneer ZSB was nearly two times greater than that of lauan particleb oard.