Properties of Compressed Veneer from China Fir Plantation Wood

In this study, we investigated the properties of compressed veneer from China fir (Cunninghamia lanceolata) plantation wood. China fir wood was cut into veneer at 2.5 mm in thickness using a rotary lathe. After drying, the veneer was compressed by a press at a high temperature. The set recovery, abrasion, roughness, dynamic Young’s modulus, modulus of rupture (MOR), modulus of elasticity (MOE), and hardness of the compressed veneer were then tested. The set recovery of the compressed veneer deteriorated with the press time and temperature rises. The abrasion depth of the compressed veneer was less than that of the uncompressed veneer, but the abrasion weights of both were approximately the same. The compression process caused a significant improvement in the surface roughness of the veneer. The dynamic Young’s modulus, MOR, MOE, and hardness of the compressed veneer showed obvious increases with increasing specific gravity. A linear relationship between the specific gravity and each strength property was found.本研究针对杉木（Cunninghamia lanceolata）人工林木材制备的压缩单板性能展开了系统性探究。采用旋切机将杉木加工为厚度2.5 mm的单板，经干燥处理后，通过热压机进行高温压缩。随后对压缩单板的定形回复率、耐磨性、表面粗糙度、动态杨氏模量（dynamic Young’s modulus）、断裂模量（MOR）、弹性模量（MOE）以及硬度进行了测试。 压缩单板的定形回复率随热压时间延长与温度升高而劣化。压缩单板的磨耗深度低于未压缩单板，但二者的磨耗质量损失大致相当。压缩工艺可显著改善单板的表面粗糙度。压缩单板的动态杨氏模量、MOR、MOE及硬度均随比重提升呈明显上升趋势，且比重与各项强度性能之间存在线性相关关系。