定向结构刨花板在中国市场迅速发展可能性探讨

介绍了定向结构刨花板的基本情况，结合我国当前的林业产业政策，分析了国内建筑业市场对定向结构刨花板的需求，认为定向结构刨花板在不久的将来能在国内得到迅速发展。     

定向刨花板生产工艺特点及应用

简述定向刨花板的发展，并对定向刨花板用途及生产工艺进行阐述。     

定向刨花板弹性模量理论分析的试验验证

介绍了定向刨花板的试验方法和过程；并应用概率设计理论求出了定向刨花板主方向的弹性模量，对定向刨花板产品进行了试验研究并与实验室产品进行了分析比较；分析了影响定向刨花板产品质量的主要因素。解决了定向刨花板弹性模量的理论求解公式的实验验证问题，论证了理论推导结果的正确性，尝试将现代设计方法和微观力学理论应用于人造板的力学性能分析和研究中，以推动定向刨花板的计算机仿真工作的开展。     

定向刨花板挠度与蠕变试验

采用正交异性的挠度方程计算四边筒支定向刨花板的中心点挠度，并在实验基础上对此进行验证，从而得到满足实际生产的定向刨花板挠度值计算公式，并对６ｍｍ，１０ｍｍ定向刨花板进行蠕变测试，找出持荷时间与挠度之间关系，进一步分析终挠度值与初挠度值之比，静曲强度和弹性模量损失量。     

定向刨花板及其生产工艺特点

叙述了发展定向刨花板生产的意义，定向刨花板的特点及用途；对其生产工艺过程及性能测试一一进行了阐述。     

浸渍纸饰面定向刨花板性能研究

研究了定向刨花板覆以杨木单板和三聚氰胺浸渍纸贴面后的性能，并初步探讨了主要生产工艺参数对饰面定向刨花板性能的影响。研究的结果表明；在定向刨花板和三聚氰胺浸渍纸之间加入一张杨木单板进行一次性压贴在工艺上是可行的，定向刨花板经此法贴面后，物理力学性能明显提高，表面质量明显改善，“映像（telegraphing）”现象消除。     

定向刨花板的特性及其在家具与室内装修中的应用

通过分析定向刨花板的发展历程、特性及生产工艺,对定向刨花板在家具与室内装修中应用的可行性进行了分析和探讨,并对其在家具及室内装饰中的用材形式进行了具体的展开和说明,为探索定向刨花板的发展与使用前景做出了论述.     

我国定向结构刨花板的现状和发展前景

本文介绍了定向结构刨花板的性能、用途和国内外发展的状况,提出了在我国发展定向结构刨花板应解决的几个问题,指出不论从人造板的发展趋势,还是从保护生态环境,发展迷生人工林培育与利用的可持续发展策略上看,定向结构刨花板作为新型的人造板在我国必将有巨大的发展潜力。     

国内定向结构刨花板厂家陷入困境的思考

１定向结构刨花板简介 定向结构刨花板是７０年代末、８０年代初迅速发展起来的一种新型高强度木质刨花板，是以速生丰产的小径材、间伐材及木芯等为原料，通过专用设备加工成为长４０～７０ｍｍ、宽５～２０ｍｍ、厚０．３～０．７ｍｍ的刨片，经干燥、施胶和专用设备将表芯层刨片纵横交错定向铺装后热压成型的一种结构人造板。由于定向结构刨花板保留了天然木材的各种优点，而又消除了天然木材的各向异性及横向强度低、易干裂的缺点，所以可广泛应用于建筑行业、车船制造业、家具制造业及集装箱包装业等。定向结构刨花板在欧洲和美洲，尤…     

定向结构刨花板吸声性能的研究

采用驻波管法测定定向结构刨花板的吸声系数,分析比较了定向结构刨花板与砖、混凝土吸声性能的差异。结果表明,定向结构刨花板具有良好的吸声性能。     

定向刨花板剪切模量和弹性模量动态测试

【目的】研究定向刨花板(OSB)的各向异性,探讨OSB面内剪切模量动态和静态测试方法,以提供一种快速、简便、重复性好、精度高的动态测试方法测量和分析OSB弹性常数。【方法】应用ANSYS程序计算OSB自由板和悬臂板试件的振形系数,给出振形系数依赖于板长宽比和宽厚比的关系式,通过仿真计算、动态试验和方板静态扭转试验验证其正确性。动态试验测试OSB剪切模量试件从一块整张OSB上下料制作,分为3个方向,即沿整板纵向下料制作的试件(0°或x向)、横向方向下料制作的试件(90°或y向)和沿与纵向呈45°方向下料制作的试件;方板扭转试验测试OSB剪切模量试件沿整板纵向或横向下料制作;动态测试OSB纵向、横向和45°方向弹性模量以及面内剪切模量和45°方向剪切模量。【结果】OSB实测纵向弹性模量是横向弹性模量的2.89倍,45°方向剪切模量小于面内剪切模量。正交各向异性材料方板扭转试验测试剪切模量推算公式需用±45°方向应变测量值的差值进行推算,将其用于OSB,测得的静态剪切模量与动态测试的剪切模量相当吻合。【结论】OSB弹性模量具有方向性,纵向最大,横向最小,45°方向介于二者之间;自由板扭转振形法和悬臂板扭转模态法适用于动态测试OSB面内剪切模量,其正确性得到方板扭转试验验证;0°和90°OSB动态测得的剪切模量几乎相等,可作为OSB面内剪切模量Gxy的估计值;OSB不宜按单向复合材料处理,在理论分析时宜按正交各向异性处理,OSB45°方向的剪切模量G45°相似文献   

竹材是我国制造OSB的一种潜在原料

定向刨花板(OSB)是近20年人造板家族中发展最迅速的一种板材。国外已呈现原料供应不足状况。我国OSB制造业正在起步阶段,将来也会面临原料资源问题。我国是世界第一产竹大国,通过分析竹材的理化性质和采用毛竹进行压板试验,结果表明竹材极有可能替代木材成为制造OSB的一种新原料。     

2009年世界中密度纤维板生产能力调查(第一部分欧洲和北美地区)

作者约翰·瓦德斯沃思(John Wadsworth)先生是Intermark的总经理。他以英国国内研究为依托,在世界人造板领域从事研究和咨询工作已经有27年之久,在业界享有极高的威望。现将英国《国际木质人造板》2010年第3期杂志上约翰·瓦德斯沃思(JohnWadsworth)先生撰写的2009年度世界中密度纤维板生产能力调查这篇文童翻译成中文,以飨读者。文章以截止2009年12月欧洲和北美地区中密度纤维板生产能力一览表为依据,详细阐述了中密度纤维板市场的过去、现在和将来。     

定向刨花板的应用现状与增值加工

OSB是一种环境友善、符合可持续发展的材料。笔者介绍了OSB特点、国内外生产现状,尤其是介绍了OSB在北美住宅及其他工业中的应用情况,以及为拓展其用途而进行的OSB产品增值加工研究。     

塑化定向结构板的研制

用低浓度低分子量的ＰＦ胶的浸胶工艺，以常规工艺（热进热出工艺）和特殊工艺（冷进冷出工艺）两种方法生产ＯＳＢ板，这些板称为塑化定向结构板；比较了这两种ＯＳＢ板的物理力学性能上的差异，采用二次正交数学模型，得出两种方法的最优工艺参数，以提高ＯＳＢ的综合性能指标，扩嵈笃溆τ梅段А     

Thermal degradation of bending strength of plywood and oriented strand board: a kinetics approach

The construction industry has relied heavily on wood and wood-based composites, such as oriented strand board (OSB) and plywood for timber frame construction. Therefore, it is highly imperative to categorize the response of wood-based composites when exposed to elevated temperatures for a sustained period of time. The essence of fire-resistant structural design is to ensure that structural integrity be maintained during and after the fire, prevent collapse and maintain means of egress. Another aspect is to assess post-fire structural integrity and residual strength of existing structure. The objective of this project was (a) to study the effect of exposure time on bending strength (MOR) of OSB and plywood at elevated temperatures, (b) to interpret any relationships between different temperature and time of exposure using a kinetics model for thermal degradation of strength, and (c) to develop a master curve representing temporal behavior of OSB and plywood at a reference temperature. As much as 1,152 samples were tested in static bending as a function of exposure time and several temperatures. Strength (MOR) of both OSB and plywood decreased as a function of temperature and exposure time. These results were fit to a simple kinetics model, based on the assumption of degradation kinetics following an Arrhenius activation energy model. The apparent activation energies for thermal degradation of strength were 54.1 kJ/mol for OSB and 62.8 kJ/mol for plywood. Furthermore, using the kinetics analysis along with time–temperature superposition, a master curve was generated at a reference temperature of 150°C which predicts degradation of strength with time on exposure at that reference temperature. The master curves show that although plywood has a higher initial strength, OSB performs better in terms of strength degradation after exposure to elevated temperature.     

中国与日本建筑结构用定向刨花板标准对比研究

近年来我国定向刨花板（OSB）产能逐年增加，目前主要应用于家具制造与装修，而在建筑结构中应用相对较少；为了实现我国碳达峰、碳中和目标，随着村镇装配式建筑的发展，建筑结构用OSB使用量必将大幅上升，主要用作木结构和轻钢建筑的墙面板、楼面板和屋面板等结构用覆面板。1987年日本就制定了日本农林标准（JAS）《構造用パネル》（《结构用人造板》，最新版JAS 0360:2019），作为结构用OSB产品质量认证和检测的主要依据，而我国目前没有专用的结构用OSB产品标准。与结构用OSB 日本农林标准比较，我国行业标准LY/T 1580-2010《定向刨花板》中规定的承载型板材在指标要求、试件尺寸和数量、试验方法、抽样方案以及产品合格判定方法等方面存在较大差异。通过对比中日标准技术规定的异同，以期为OSB在我国建筑结构领域使用的规范化与标准化提供参考。鉴于钉连接性能对建筑结构的抗震性能影响显著，建议在我国标准修订中增加该项指标规定。     

Effect of two relative humidity environments on the performance properties of MDF, OSB and chipboard

The static strength, stiffness and fatigue life of MDF, OSB and chipboard have been measured in a 65%RH environment and a 85%RH environment. Chipboard is commonly utilised as a flooring material and OSB is also used in structural applications, for example floor decking and webs of I-beams. The mean static strengths of MDF, OSB and chipboard at 65%RH were 47.9 MPa, 27.9 MPa and 21.0Mpa, respectively, compared with 34.59 MPa, 21.70 MPa and 10.61 MPa at 85%RH. However, MDF has mostly been used in non-structural applications, such as furniture, so its resistance to fatigue loads as a structural panel is of considerable interest. In a 65%RH environment dynamic modulus values showed that whilst MDF and chipboard exhibit similar stiffness values (4 GPa), OSB is approximately 50% stiffer. However, at 85%RH MDF was the stiffest of the three materials, followed by OSB and chipboard. The fatigue life performance of all three panel products was markedly lower at 85%RH compared with 65%RH. Overall, the high RH environment had a noticeably detrimental effect on the MOE (modulus of elasticity), MOR (modulus of rupture) and fatigue lives of OSB and chipboard. This is attributed to these panels retaining more of the original characteristics of the original wood, i.e. larger particle sizes (flakes/chips) compared with the homogeneous fibrous composition of MDF. Received 5 November 1999     

Fatigue in wood-based panels. Part 2: property changes during fatigue cycling of OSB, chipboard and MDF

Wood-based panels are viscoelastic so when a load (stress) is applied to them there is a time lag before a deflection (strain) is produced, which results in hysteresis (a loss of energy). The capture of stress versus strain hysteresis loops is a non-interruptive method of monitoring the damage produced during fatigue testing. Hysteresis loops were captured throughout the flexural fatigue testing of OSB, chipboard and MDF in four-point bending allowing the development of fatigue damage to be followed. The MDF tested had a greater mean bending strength than the OSB and chipboard. When stresses were applied to the materials as a percentage of their bending strengths, the stresses applied to the MDF samples were larger than those applied to the OSB and chipboard samples. As a result the microstrains were greater for MDF than for the chipboard and OSB. The OSB was stiffer than the chipboard and MDF, which were both of similar stiffness. The information gained from the hysteresis loops indicates that the OSB, chipboard and MDF all had fatigue limits just below 20% of their bending strengths. The fatigue limit for the MDF is likely to be slightly lower than for the chipboard and the OSB.     

Differential scanning calorimetry characterization of the cure of phenol-formaldehyde adhesive in the presence of copper-based preservative treated wood

The interference of copper based preservative treated southern yellow pine (SYP) on the cure of phenol-formaldehyde adhesives was investigated by using differential scanning calorimetry (DSC). Copper preservatives used in this study include copper azole (NS), alkali copper quat (ACQ)-type C (NW). Three commercial phenol-formaldehyde (PF) adhesives used for oriented strand board (OSB) face area, core area and a plywood adhesive were studied. The curing peak temperature and peak time of OSB core and face PF resin shifted to higher temperature and duration in the presence of CCA, NS, and NW-treated SYP compared to that in untreated SYP. The above treatments interfere with the cure of OSB core and face PF resin. Untreated SYP showed a curing accelerating effect on the cure of plywood adhesive, but the accelerating effect of copper-treated SYP on the cure of plywood resin was not significant.