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豆秸刨花板工艺的初步研究 总被引:1,自引:0,他引:1
本文分析了整株豆秸的化学成分,研究了用豆秸制造刨花板的工艺,并分析了不同工艺条件对刨花板性能的影响。结果表明:豆秸制造的刨花板,其物理力学性能和外观均达到国家标准要求,可以认为豆秸是制造刨花板适用的原料。 相似文献
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通过对异氰酸酯(API)主剂进行改性,从而减少交联剂的用量,降低API胶黏剂的生产成本。将改性API胶黏剂用于秸秆板薄木贴面的试验表明,当主剂、交联剂、填料之比为100∶4∶30,热压温度为60~110℃时,秸秆板的贴面效果达到相关国标要求。 相似文献
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以秸秆定向板(OSSB)代替常用的定向刨花板(OSB),研究其作为轻型木结构建筑覆面板的钉节点连接性能。结果表明:在覆面板与SPF(云杉-松-冷杉)的顺纹方向垂直,加载方向与覆面板长边平行的受力状态下,OSSB-SPF组合钉节点平均极限荷载比OSB-SPF组合提高了18%,所对应的平均位移下降了11%;当覆面板与SPF的顺纹方向平行,加载方向与覆面板长边平行的受力状态下,与OSB-SPF组合相比,OSSB-SPF组合的钉节点平均极限荷载提高了16%,所对应的平均位移下降了13.5%。在钉节点连接性能上OSSB可以代替OSB与SPF连接,能够成为轻型木结构墙体承重结构的一部分,是轻型木结构墙体外覆面板的良好选择。 相似文献
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不同秸秆原料发酵产沼气试验研究 总被引:3,自引:0,他引:3
以猪粪、沼液和池塘水对玉米、稻草秸进行预处理,研究不同秸秆厌氧发酵产沼气能力。结果表明:采用沼液预处理后的玉米、稻草秸质地柔软,表面布满白色菌落和菌丝,采用沼液顶处理的玉米、稻草秸累计产气量分别为34475、331390mL,发酵期间沼气产气量在50天内保持一个平稳、较高的水平。采用猪粪预处理的玉米、稻草秸厌氧发酵分别在第15、17天产气出现了停止,约20天后产气恢复。发酵温度在26.5—32.0℃范围内,对厌氧反应的影响不明显,反应后期产气量的大小主要取决于发酵原料的连续补充。 相似文献
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介绍了在秸秆人造板的生产过程中,原料资源的类别、分布、收集、输送及贮存等方面的问题,提出了原料的加工处理方式和原料单元的形态与木材的区别,体现了原料及其单元在整个生产过程中的重要性、持久性、环保性和安全性。根据我国秸秆原料的基本特性,用秸秆原料做成素面或贴面的秸秆板是完全可行的。我国科技人员通过长期的研究,发明了年产5万m~3秸秆刨花板成套生产技术。 相似文献
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刨花板平面密度的变异性是衡量板坯成形个常指标。本文论述了影响刨花板平面密度变异的工艺因子及平面密度变异对刨花板性能的影响。 相似文献
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The purpose of this study was to determine whether the strength properties of a composite board containing waste paper as a core material, could be improved by the prior prepressing of the core material before pressing the product to final thickness. Results indicated that intermediate cold prepressing of the core layer had no effect on the bending strength and MOE and can thus be eliminated. Flakeboard containing Kraft waste paper appears to be superior to commercial particle boards, with regard to thickness swelling in water. Results so far obtained indicate that waste paper can be utilized for flakeboard manufacture. 相似文献
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The objective of this study was to investigate the physical and mechanical performance of flakeboard reinforced with bamboo strips. The study investigated three different bamboo strip alignment patterns and an experimental control. All panels were tested in static bending both along parallel and perpendicular to the lengths of the bamboo strips. Internal bond strength (IB), thickness swelling (TS), linear expansion (LE), and water absorption (WA) were also examined. As expected, modulus of rupture (MOR) and modulus of elasticity (MOE) were substantially greater for all three experimental panel types as compared to the control group. LE was also improved for all three experimental panel groups. The bamboo strip alignment patterns had no significant effect on TS, WA and IB. The sample means for MOR, MOE and LE tested perpendicular to the bamboo strip lengths yielded slightly lower mean values than corresponding samples tested parallel to the bamboo strips lengths. This difference in mechanical properties is largely attributed to low panel density in the failure zones. 相似文献
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本文论述了橡胶木小径材和枝桠材制造薄片刨花板的可行性,并通过正交试验对脲醛胶刨花板制造工艺进行了优化选择,同时也对酚醛树脂胶粘剂制造薄片刨花板和薄型刨花板进行了探索。试验表明,橡胶木可以制造出质地良好的刨花板。 相似文献
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玉米秸秆的催化热化学液化研究 总被引:1,自引:2,他引:1
研究了玉米秸秆在多元醇中的液化反应,讨论了不同反应条件的影响,并分析探讨了液化产物的性质及其组成成分随反应时间的变化.实验结果表明:玉米秸秆在聚乙二醇-丙三醇 (质量比80∶ 20) 的液化溶剂中,当催化剂H2 SO4质量分数为3%、液固质量比为10∶ 2,反应温度150℃时液化效率较高,液化反应180min后其残渣率仅为8.1%.在液化反应初期,玉米秸秆中的木质素已完全液化;随着液化反应时间的延长,其液化残渣率逐渐降低,液化产物的羟值在375 ~ 330mg/g间逐渐降低、酸值在13 ~ 27mg/g间逐渐增加;其重均相对分子质量(MW)为1200 ~ 1450.GC-MS分析表明,液化产物中主要含有多元醇的低聚合体,以及多元醇和玉米秸秆降解产物的氧化和酯化反应产生的羧酸及其酯. 相似文献
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MEI Changtong DAI Chunping ZHOU Dingguo . Nanjing Forestry University Nanjing P.R.China . Forintek Canada Corp. Vancouver BC VT W Canada 《中国林业科技(英文版)》2005,4(2):58-65
Along with the worldwide decrease of round woodwith high quality and large diameter day by day, theoutput of lumber and plywood used in constructionis declining year by year. But the market demand forcomposites keeps rising. Non-veneer woodcomposites (Oriented Strand Board, Flakeboard,Medium Density Fiberboard) will be the mainstreamof composites in the future. At present, OrientedStrand Board and structural flakeboard have to a largedegree replaced structural plywood in buildingconstructi… 相似文献
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