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首页> 外文期刊>Pro Ligno >INFLUENCE OF HEAT TREATMENTS ON THE MOR AND MOE OF PANELS MADEFROM THIN (D MAX =160 MM) SESSILE OAK (QUERCUS PETRAEA SPP. MATT.LIEBL.) TREES
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INFLUENCE OF HEAT TREATMENTS ON THE MOR AND MOE OF PANELS MADEFROM THIN (D MAX =160 MM) SESSILE OAK (QUERCUS PETRAEA SPP. MATT.LIEBL.) TREES

机译：热处理对人造板薄（D MAX = 160 MM）无糖橡木（QUERCUS PETRAEA SPP.MATT.LIEBL。）树的MOR和MOE的影响

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Sustainable forest management is meant to ensure forest goods and services purchased in response to immediate requirements and at the same time ensuring their continued availability and contribution to long-term development. On the 8th of July 1999, the European Council Regulation regarding measures to promote the conservation and management of forests came into force and refers to the potential recovery of wood secondary resources approximated to 9-10%, which opens subjects of research for a better insight to this matter. The ecological benefit of using secondary wood resources can be further enhanced by heat treatment, which is an ecological modality to improve some properties, such as hygroscopicity, dimensional stability and durability, as a consequence of the changes which occur in the chemical composition of wood under the effect of high temperature. In this research a comparison was made between untreated solid longitudinally textured wood panels and heat treated ones, regarding density, mass, modulus of elasticity and bending strength. The objective of the study was to determine if heat treatment, besides its benefits, has any negative effect on the MOR and MOE of solid wood panels. The solid wood panels are made of timber cut from thin (dmax=160mm) sessile oak (Quercus petraea spp. Matt. Liebl.) trees, which resulted from thinning operations of forestry. Two types of joining were investigated: edge to edge joint and finger joint panels, both heat treated and untreated. Raw material was heat treated at 130oC for 2h and the tests on panels were performed according to EN 310:1993. Heat treatment caused a drop of density (by 19kg/m3) and mass (by 0.3-0,4kg/m2) in both panel types compared to the untreated panels. The differences between the values of MOR and MOE for treated and untreated panels is insignificant (around 1,5%). This research confirmed the hypothesis that making panels out of thin sessile oak trees is feasible and rewarding. The results regarding MOE and MOR show that these panels can be used successfully in furniture production and the values, comparable with laminated densified wood, indicate an expansion of the utilisation field, if their dimensional stability offers good results.
机译：可持续森林管理的目的是确保根据近期需求购买林产品和服务，同时确保其持续供应和对长期发展的贡献。 1999年7月8日，关于促进森林保护和管理的措施的欧洲理事会条例生效，并指木材次生资源的潜在回收率约为9-10％，这为研究提供了一个更好的见解。这个事情。热处理可以进一步提高使用次级木材资源的生态效益，热处理是一种生态方式，可以改善某些特性，例如吸湿性，尺寸稳定性和耐久性，这是由于木材化学成分发生变化所致。高温的影响。在这项研究中，在密度，质量，弹性模量和弯曲强度方面对未处理的固体纵向纹理木板和热处理的木板进行了比较。该研究的目的是确定热处理除具有益处外，是否对实木面板的MOR和MOE有不利影响。实木面板是由砍伐薄木（dmax = 160mm）的无柄橡树（栎木（Quercus petraea spp。Matt。Liebl。））砍伐而成的。研究了两种类型的连接：边缘对边缘连接和指接面板，均经过热处理和未处理。原材料在130oC下热处理2h，并根据EN 310：1993在面板上进行测试。与未经处理的面板相比，热处理导致两种面板类型的密度（降低19kg / m3）和质量（降低0.3-0,4kg / m2）降低。处理过的和未处理过的面板的MOR和MOE值之间的差异不明显（约1.5％）。这项研究证实了这样的假说，即用无梗的橡树制作面板是可行且有益的。有关MOE和MOR的结果表明，这些面板可以成功地用于家具生产中，如果它们的尺寸稳定性能提供良好的结果，则这些值可以与层压的致密木材相媲美，表明利用领域得到了扩展。

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