Manufacture of laminated strand veneer (LSV) composite. Part 1: Optimization and characterization of thin strand veneers
Manufacture of laminated strand veneer (LSV) composite. Part 1: Optimization and characterization of thin strand veneers
复制标题
层压单板（LSV）复合材料的制造。
DOI：
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发表时间：
2008
期刊：
影响因子：
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通讯作者：
V. Yadama
中科院分区：
文献类型：
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作者：
Shilo W. Weight;V. Yadama
森林资源由于防火和老龄林的枯竭而发生变化。需要应用小径幼龄材，特别是低价值树种，如美国黄松。在这项研究中，引入了一种新型的3.2 mm厚的西黄松细木股复合材料作为单板替代品。对工艺参数酚醛树脂含量、压板温度和长径比（L/t）进行了优化。用优化的配方（5.5%树脂，压板温度152°C，和纵横比430）分别获得10.2GPa和79.1MPa的平均弹性模量和断裂模量值。这些值大约是2-2.5倍，比父母的小直径黄松木材。结果表明，快速增长的低密度树种-如杂交杨树，或小直径木材主要是少年木材-可以潜在地用于制造质量一致的绞线单板，具有显着更高的强度和刚度比母体材料。
Abstract The forest resources are changing due to fire prevention and depletion of old growth forest. Applications for small-diameter juvenile timber, especially for low-value species, such as ponderosa pine (Pinus ponderosa) are needed. In this study, a novel thin wood strand composite of P. ponderosa, 3.2 mm thick, is introduced as a veneer substitute. Optimization was performed for the processing parameters phenol formaldehyde resin content, platen temperature, and the aspect ratio strand length to thickness (L/t). Mean modulus of elasticity and modulus of rupture values of 10.2 GPa and 79.1 MPa, respectively, were obtained with the optimized formulation (5.5% resin, platen temperature 152°C, and aspect ratio of 430). These values were approximately 2–2.5 times higher than the parent small-diameter ponderosa pine lumber. The results indicate that fast-growing low-density species – such as hybrid poplars, or small-diameter timber with predominantly juvenile wood – could potentially be used to manufacture strand veneers of consistent quality with significantly higher strength and stiffness than parent material.