杉木积成材薄木贴面工艺初探

采用正交试验法，探讨了杉木积成材薄木贴面的工艺过程。试验结果表明：利用杉木积成材进行薄木贴面．工艺切实可行，奥古曼薄木贴面的较佳工艺参数为：热压温度100℃，热压压力1．0MPa，热压时间4min，涂胶量120g／m^2。     

速生杉木为基材的水曲柳薄木贴面初步研究

以速生杉木为基材，水曲柳薄木为贴面材料，用脲醛树脂粘剂（UF）和聚醋酸乙烯醋乳液胶（PVAc）按一定比例混合后作为胶粘剂，热压贴面胶合，对温度和时间与巾面效果的关系进行了研究。结果表明：①用UF与PVAC比例混合的胶粘剂，在生杉木上进行水曲柳薄木贴面是可行的；②热压温度和时间对贴面效果的影响都是极显著的，并得到了一种较理想的薄木贴面热压工艺。     

竹木复合积成材生产工艺研究

以杉木制材边皮经梳解获得的木束条和刨切薄竹过程中产生的废料为原料,选用酚醛树脂胶黏剂,探讨竹木复合积成材生产工艺及各因素对复合材料性能的影响。结果表明,随着竹片废料用量的增加,竹木复合积成材的各项性能均有不同程度的提高;竹木混杂比、木束条粗细及比例和板密度对积成材静曲强度和弹性模量的影响较大;木束条施胶量对积成材吸水厚度膨胀率和内结合强度的影响较大。     

木束条尺寸对杉木积成材性能的影响研究

为了探索较佳的木束条尺寸,以提高杉木积成材的质量,研究了不同尺寸的杉木木束条对杉木积成材性能的影响规律,结果表明:木束条的长度对杉木积成材的纵向静曲强度、弹性模量、24h吸水厚度膨胀率有较大的影响;木束条的厚度对杉木积成材纵向静曲强度、弹性模量的影响不大,但对24h吸水厚度膨胀率、内结合强度有较大的影响;木束条的宽度对杉木积成材的物理力学性能影响极小,不存在统计意义上的影响;木束条的较佳尺寸为:长度120 mm,宽度4mm,厚度2.5 mm.     

用做家具与装饰材料竹材贴面杨木性能分析

杨木是我国主要的短周期工业用材林树种之一,但其材质松软,物理力学性能差,在家具与装饰利用方面受到很多限制。对20mm毛竹竹片进行含竹青、去竹青、染色、凹凸异形等表面处理后,采用热压工艺进行了竹片贴面速生毛白杨木材工艺试验,并探讨了竹片各种表面装饰处理的装饰效果和用途。结果表明：涂胶量120g/m^2,热压温度120℃,压力3MPa,热压时间5min,竹片与杨木基材胶合良好,既提高了杨木的物理力学性能,也提高了杨木的附加值扩大了应用范围。     

塑膜增强薄木贴面高密度纤维板的工艺优化

以塑膜增强红栎装饰薄木为贴面材料,以高密度纤维板(HDF)为基材,采用响应面方法优化贴面工艺,高温热压制备塑膜增强薄木贴面HDF。结果表明:塑膜增强薄木贴面HDF的表面胶合强度受热压温度的影响为极显著影响,受热压压力的影响显著,受热压时间和压力、温度和时间的交互作用影响亦显著。在优化工艺条件下,塑膜增强薄木贴面HDF的表面胶合强度达1.60 MPa,满足GB/T 15104-2006《装饰单板贴面人造板》的要求。     

薄木贴面装饰板防翘曲变形的工艺创新

通过对人造板基材和贴面材料(薄木)的含水率调整处理、完全去除基材表面的致密硬化层、热压过程参数控制及热压后贴面装饰板的养护等工艺技术的创新,以改进传统薄木贴面的生产工艺。试验结果表明:技术创新后的人造板基材贴薄木饰面板件的尺寸偏差小,翘曲变形≤1%,贴面装饰板的浸渍剥离长度为20 mm,表面胶合强度0.5 MPa,贴面质量得到保证,贴面板件的理化性能更加优异,产品合格率提高60%以上。     

楠竹竹片基材弯曲构件冷压胶合工艺研究

采用微波加热软化的方式,研究了楠竹竹片基材弯曲构件冷压胶合工艺中各个因子对胶合质量的影响。实验结果表明:随着涂胶量的增加,胶合质量先增大后减少;弯曲胶合后应立即上好夹具进行干燥;干燥温度对胶合质量的影响不显著;干燥后随着陈放时间的延长,胶合质量逐渐趋于稳定;在容易弯曲到规定的半径值的前提下,建议采用较低的含水率竹片进行弯曲件的制作。     

贴面和封边时胶温度的监控（二）

Lippe und Hoxter高等专业学院和Braunschweig技术大学机床研究所合作的科研项目对贴面过程温度的监控进行了试验和研究。他们在贴面机上用薄膜贴面材料对人造板或实木工件进行贴面,采用的胶料为乙烯醋酸乙烯酯（EVA）、聚烯烃（APAO）或聚氨酯（PUR）熔化胶。在贴面过程中集中注意三个方面：胶料、贴面过程和基材。由于使用的是熔化胶,其温度和温度历程对胶合结果有重要影响。     

木塑复合材料薄木贴面工艺初探

探讨对木塑复合材料(WPC)进行薄木贴面装饰的可行性,并针对贴面过程中工艺方法、胶黏剂的选配、表面胶合强度及各种工艺参数进行了研究。结果表明:采用"中有1396"塑木材料专用胶黏剂(特种胶),基材表面进行除尘、选样、剪切处理之后,在上胶量为100 g/m2、冷压压力0.5~1.0 MPa、时间60 min的条件下制成的贴面装饰板具有可行性。     

竹木复合定向刨花板强度性能研究

本文论述了竹材、意大利杨复合定向刨花板的强度性能,就胶种、刨花厚度、竹材所占比率、板密度、板坯结构、施胶量等诸因子对板材强度性能的影响进行了探讨。结果表明:(1)胶种对竹木复合定向刨花板的强度影响不大;(2)降低刨花厚度或提高板密度均可使板材强度提高;(3)单层结构的复合定向刨花板强度最高;(4)提高板材中竹材的比率可使板子强度明显改善;但竹材比率过高时,板材强重比反而下降,呈开口向下的抛物线型变化;(5)酚醛树脂定向刨花板的强度随原料酸性增大而降低。     

Study on sheet material made from zephyr strands V: Properties of zephyr strand board and zephyr strand lumber using the veneer of fast-growing species such as poplar

Zephyr strand board (ZSB) and zephyr strand lumber (ZSL) were produced using zephyr made from poplar veneer to investigate the greater utilization of low-density poplar as a structural material. These materials were then compared to ordinary plywood, laminated veneer lumber (LVL) from poplar veneer, lauan plywood, and particleboard. The bending properties (moduli of rupture and elasticity) of ZSB proved superior to those of poplar plywood: and ZSL produced from poplar veneer zephyr had bending properties greater than ordinary LVL from poplar veneer. Apparently, the conversion of the poplar veneer into zephyr material had a positive effect on bending properties. Additionally, poplar ZSB had bending properties superior to those of lauan particleboard and equal to those of lauan plywood. The internal bond strength of poplar veneer ZSB was nearly two times greater than that of lauan particleboard.Parts of this report were presented at the international symposium on the utilization of fast-growing trees, Nanjing, China, October 1994. Report IV appeared inMokuzai Kogyo 49:599, 1994     

杉木指接集成板的生产工艺与技术

采用南方速生杉木制造指接集成板,从杉木材性、加工工艺、设备性能、材料利用率、生产成本、产品质量和市场需求等方面出发,研究和分析了南方速生杉木制造指接集成板的特点和应掌握的技术问题.结果表明,这种杉木有高胶接强度和浸渍剥离强度,但自身剪切强度较低.采取恰当的工艺与技术,用南方速生杉木可以生产出满足市场需求的较高质量的指接集成板.     

刨切薄竹贴面中密度纤维板工艺研究

对刨切薄竹贴面中密度纤维板(MDF)的工艺进行了研究,结果表明:在MDF的上下表面直接粘贴刨切薄竹的工艺可行,并根据试验结果确定了较优的贴面工艺参数.测试结果还显示,刨切薄竹背衬无纺布后再与MDF胶合,其表面胶合强度比刨切薄竹直接贴面MDF时低.     

Effect of board density and layer structure on the mechanical properties of bamboo oriented strandboard

This study examined the effects of density and layer structure on the mechanical properties and dimensional stability of strandboard manufactured from moso bamboo (Phyllostachys pubescens). The strandboard was fabricated in a laboratory at five densities and three different structures including a randomly oriented homogenous board, a unidirectionally oriented homogenous board, and a three-layered board with a cross-oriented core layer (BOSB). Bamboo strand alignment distribution could be predicted using the von Mises distribution function. Bending properties increased with increasing density and were affected by layer structure. The modulus of rupture (MOR) of the threelayered board in the parallel direction increased remarkably compared with the random board MOR; in the perpendicular direction, it exhibited less strength reduction. Elastic properties of the three-layered board could be predicted using elastic constants of the unidirectional board. Internal bond strength (IB) was greatly affected by density, but the layer structure effect did not appear in IB. Linear expansion per unit moisture change ranged from 0.017 to 0.022 for random and three-layered boards; these values are comparable with or lower than values for commercial board.     

Comparing aboveground carbon sequestration between moso bamboo (Phyllostachys heterocycla) and China fir (Cunninghamia lanceolata) forests based on the allometric model

The purpose of this study was to compare carbon sequestration between moso bamboo (Phyllostachys heterocycla) and China fir (Cunninghamia lanceolata) forests. The study site was located in the lower mountain area of central Taiwan, where both moso bamboo and China fir were rich. In addition, moso bamboo and China fir forests were surveyed on 12 and 19 plantations, respectively. We predicted carbon sequestration based on the allometric model for moso bamboo and China fir forests and compared the relationships between characteristics of bamboo forests and elevation. The results showed that mean diameter at breast height (DBH), culms per hectare and aboveground biomass were not clearly affected by elevation, whereas a negative correlation (R = −0.600, p = 0.039) between mean DBH and stand density was found for moso bamboo forests. Moreover, the aboveground carbon storage was higher for China fir forests than for moso bamboo (99.5 vs. 40.6 Mg ha⁻¹). However, moso bamboo is an uneven-aged stand which is only composed of 1-5-year-old culms, while China fir is an even-aged stand and the age range is from 15 to 54 years, such that, per year, the mean aboveground carbon sequestration is 8.13 ± 2.15 and 3.35 ± 2.02 Mg ha⁻¹ for moso bamboo and China fir, respectively. On the other hand, the mean carbon sequestration of China fir decreases with increasing the age class. Furthermore, the ratio of moso bamboo to China fir is 2.39 and a T-test showed that the aboveground carbon levels were significantly different between these two species; thus, moso bamboo is a species with high potential for carbon sequestration.     

基于灰色系统理论的我国木材产品产量预测模型的建立

基于灰色系统理论构建了我国包括木材、竹材、锯材和人造板在内的主要木材产品产量的预测模型,并对预测模型进行了检验.结果显示,预测模型可直接用于预测我国在未来年份的木材、竹材、锯材和人造板等产品的产量.     

三种竹碎料板的物理力学性能比较分析

对三种竹碎料板的物理力学性能进行了比较分析。板材弹性模量：竹席增强竹碎料板〉竹碎料/木纤维复合板〉普通竹碎料板;静曲强度：竹席增强竹碎料板〉竹碎料/木纤维复合板〉普通竹碎料板;吸水率：普通竹碎料板〉竹碎料/木纤维复合板〉竹席增强竹碎料板;吸水厚度膨胀率：普通竹碎料板〉竹碎料/木纤维复合板〉竹席增强竹碎料板;内结合强度：竹碎料/木纤维复合板〉竹席增强竹碎料板〉普通竹碎料板。     

Development of structural composite products made from bamboo I: fundamental properties of bamboo zephyr board

A study was conducted to determine the suitability of zephyr strand from moso bamboo (Pyllostachys pubescens Mazel) for structural composite board manufacture. Thirty-two 1.8×40×40cm bamboo zephyr boards (BZB) were produced using four diameters of zephyr strand (9.5, 4.7, 2.8, and 1.5mm) and four target densities (0.6, 0.7, 0.8, and 0.9g/cm³). Results indicate that BZB exhibits superior strength properties compared to the commercial products. The size of the zephyr strand and the level of target density had a significant effect on the moduli of elasticity and rupture, internal bond strength, water absorption, and thickness swelling, but they did not have a significant effect on linear expansion. With regard to the physical properties, BZB exhibited less thickness swelling and exhibited good dimensional stability under dry-wet conditioning cycles.Part of this research was presented at the 48th annual meeting of the Japan Wood Research Society, Shizuoka, April 1998; it was reported at the 4th Pacific Rim Bio-Based Composite Symposium, Bogor, Indonesia, November 1998