桉木单板剩余物定向刨花板的制备

Preparation of Oriented Strand Board Based on Eucalyptus Veneer Residue

目的为了有效地解决定向刨花板的原料问题,利用桉木单板剩余物为原料制备定向刨花板。方法通过设计正交实验,分别探索热压温度、铺装角度、板坯厚度等因素对定向刨花板的干湿状内结合强度、静曲强度及弹性模量等各项性能的影响。结果在热压温度为130℃,铺装角度为90°,板坯厚度为10mm,表芯层厚度比为4∶2∶4,醛树脂胶黏剂的施加量为4%(以刨花干质量计)时所制备的材料性能最佳,内结合强度达0.61MPa,平行弹性模量高达5566.9MPa,平行静曲强度高达36.85 MPa。结论利用桉木单板剩余物为原料所制备的定向刨花板,力学性能均达到LY/T 1580-2010定向刨花板标准中OSB/3的要求,且力学性能优异,这为制备一种低成本、高性能的定向刨花板提供了理论依据。

The work aims to prepare oriented strand board(OSB)with eucalyptus veneer residues as raw materials,so as to effectively the problem of OSB's raw materials.The influence of hot-pressing temperature,paving angle,slab thickness and other factors on the dry/wet internal bonding strength,static bending strength,elastic modulus and other properties of OSB were investigated by designing the orthogonal experiment.The materials prepared at 130℃with the paving angle of 90°,the slab thickness of 10 mm,the surface core layer thickness ratio of 4∶2∶4,and applied amount of aldehyde resin adhesive of 4%(in shaving's dry weight)exhibited the best performance,the internal bonding strength was up to 0.61 MPa,the modulus of parallel elasticity was up to 5566.9 MPa,and the strength of parallel static bending was up to 36.85 MPa.In this study,all the mechanical properties of the OSB prepared by eucalyptus veneer residues reach the requirements of OSB/3 in OSB standard(LY/T 1580—2010),and the mechanical properties are excellent,which provides a theoretical basis for the preparation of a low-cost and high-performance OSB.