共查询到18条相似文献,搜索用时 171 毫秒
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几种人造板甲醛释放量探讨 总被引:4,自引:0,他引:4
用抽吸法测试了胶合板、细木工板、刨花板、中密度纤维板甲醛释放量并进行比较,结果表明:在所测板种中,胶合板的甲醛释放量最高,细木工板次之。 相似文献
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人造板甲醛释放量限值及测试方法的发展--主要测试方法 总被引:3,自引:0,他引:3
采用科学的方法测定人造板甲醛释放量是科学合理地控制人造板甲醛释放量,使人造板产业得以健康发展的有利保障。通过科学工作者的努力,已研究出许多甲醛释放测试方法,诸如穿孔法、干燥器法、气体分析法、大容量测试室法、WKI法、Roffael法、双缸法、TNO法等。其中有些方法主要用于实验室研究,有些方法因其具有广泛的实用性而已被列为各国人造板甲醛释放量检测标准而得到广泛应用。为了使大家更好地了解人造板甲醛释放量的检测方法,对在实际检测中经常用的方法作一简要介绍。 相似文献
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甲醛释放量是人造板安全性的重要指标。GB18580—2012《室内装饰装修材料人造板及其制品中甲醛释放限量》中规定了4种甲醛测试方法:气候箱法、干燥器法、气体分析法和穿孔萃取法。其中气体分析法和穿孔萃取法是欧洲国家广泛采用的测定方法。气体分析法和穿孔萃取法的检测原理不同,标准规定限量水平也不同。目前,尚未有文献报道两者测定结果之间的对应关系。笔者以中密度纤维板为材料,分别应用穿孔萃取法和气体分析法测定其甲醛释放量,并建立两种测定方法结果之间的相关性和换算关系, 相似文献
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本文对纤维板的两个主要品种一硬质纤维板和中密度纤维板生产的现状和存在的问题进行了分析,并对这两种纤维板今后的发展对策进行了探讨。 相似文献
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On the measurement of formaldehyde release from low-emission wood-based panels using the perforator method 总被引:1,自引:1,他引:0
In Europe, the perforator method (EN 120) is the mostly used laboratory method of the wood-based panel industry. Usually,
the measured perforator value depends on the moisture content of the boards. According to DIBt-100, the measured perforator
values are corrected to a common moisture content (MC) of 6.5% using an established equation proposed by Jann and Deppe (1990). The correction factor of Jann and Deppe (1990) is based on the assumption that particle- and fibreboards change their perforator values to the same extent regardless whether
increasing or decreasing the moisture content in the range of 3 ≤ u ≤ 9%. Application of this correction factor to particle- and fibreboards of higher moisture content than 6.5% can lead to
biased corrected results in favour of low emission. The corrected values can also lead to paradoxical relation between the
perforator values and emission in the low-emission region. 相似文献
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曾钦志 《林业机械与木工设备》2001,29(7):9-11
叙述了中纤板纤维干燥过程含水率控制系统人机接口的一种改进方式,采用中断二维直读键盘结构,与并行接口芯片8255A接口;利用LED显示器驱动芯片ICM7228扩展LED显示器,把各参数分时显示改为单独实时显示,显示参数直观方便,便于操作人员观察。 相似文献
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Nuno A. Costa João Pereira João Ferra Paulo Cruz Jorge Martins Fernão D. Magalhães Adélio Mendes Luísa H. Carvalho 《Wood Science and Technology》2013,47(6):1261-1272
This work examines the performance of three formaldehyde scavengers in wood-based panels. Sodium metabisulfite, ammonium bisulfite and urea were applied in different physical forms during particleboard production, and the resulting physico-mechanical properties (internal bond strength, thickness swelling, density and moisture content) and formaldehyde emission levels were compared. Formaldehyde content was measured using the perforator method, and formaldehyde emission was evaluated both by desiccator and gas analysis methods. The chemical reactions involved in each formaldehyde scavenging process are proposed and discussed. The tested scavengers showed distinct performances under the different emission testing conditions, which were interpreted in terms of the stability of the chemical compounds formed upon formaldehyde capture. Sodium metabisulfite proved to be an excellent scavenger for all formaldehyde methods allowing the production of particleboard panels with zero formaldehyde emission. 相似文献
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介绍了中密度纤维板(MDF)生产过程中废水的来源,分别论述了厌氧-好氧(A/O)法与折流式厌氧反应器(ABR)-间歇式活性污泥反应器(SBR)处理法改进前后的工艺与处理效果。 相似文献
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采用剂在油中法、添加混合型表面活性剂配制中纤板用WE-2型液状石蜡防水剂,替代熔融石蜡压制中纤板,产品性能满足中密度纤维板(GB/T 11718-1999)国家标准要求。 相似文献
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三聚氰胺改性脲醛树脂胶粘剂在中密度纤维板上的应用研究 总被引:13,自引:1,他引:13
耐水性差、游离甲醛释放量高是我国中密度纤维板(MDF)存在的两个主要问题。用三聚氰胺改性脲醛树脂(MUF)胶粘剂生产MDF可以有效地提高耐水性,降低游离甲醛释放量,并使得因管道施胶引起预固化问题得到有效控制。 相似文献