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低甲醛释放木材胶粘剂研究进展 总被引:2,自引:0,他引:2
我国已成为世界人造板生产大国,木材胶粘剂年用量已超过400万t,其主要胶种为甲醛类合成树脂胶粘剂.本文评述了木材胶接用甲醛类合成树脂胶粘剂的开发研究、生产应用及发展,重点综述了低甲醛释放的脲醛树脂、三聚氰胺-尿素共缩合树脂和酚醛树脂胶粘剂的研究进展和开发应用情况,并对其发展趋势等进行了展望. 相似文献
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通过对国家最近发布实施的室内装饰装修材料甲醛释放量强制标准的介绍,阐明了当前发展低甲醛释放木材胶粘剂正面临着良好的市场机遇。 相似文献
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研究缩醛化反应中温度,酸度,原料配比和反应介质对产品性能的影响。同时通过多次实验确定了反应物的最低浓度,从而对降低生产成本,简化生产工艺有一定参考价值。 相似文献
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国内低游离甲醛脲醛树脂胶粘剂研究进展 总被引:5,自引:0,他引:5
脲醛树脂胶粘剂是一种开发应用较早的热固性高分子胶粘剂。由于其制造工艺简单,原料廉价易得,初粘大,粘接强度高,无色透明,不污染木材等优点,广泛应用于木器加工、胶合板、刨花板、中密度纤维板、人造板材的生产及室内装修等行业,是目前粘合剂中产量最大的品种,占木材胶粘 相似文献
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Volatile organic compounds (VOC) and formaldehyde emitted from building materials are considered to be one of the main causes of indoor air pollution in buildings. To reduce indoor pollutant concentrations, new installation methods for wall papers and flooring materials have been widely introduced to the construction field, including a nonadhesive floating method. However, adhesives are still widely used to install wall tiles or floor tiles on areas such as kitchens, bathrooms, and showers. The objective of this study was to investigate the influence of tile adhesive emissions on indoor air quality. The VOC and formaldehyde emission rates from two different types of tile adhesives, a conventional adhesive and a low-VOC emission adhesive, were measured using small emission test chambers. Full scale experiments were also carried out in three identical test rooms in a building. One wall of each room was finished with wallpaper in Test Room 1 and with tiles in Test Rooms 2 and 3. The other walls and ceilings were finished with wall papers in all test rooms. Wall tiles of Test Room 2 were installed with the conventional adhesive, while those of Test Room 3 were installed with the low-VOC emission adhesive. The indoor VOC concentrations in Test Room 2 were significantly higher than those in Test Room 3 due to a significantly higher VOC emission from the conventional tile adhesive. Even though the adhesives were applied under the finishing materials, investigation revealed that the adhesives were the most dominant contributor of indoor VOC concentration. 相似文献
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淀粉类胶粘剂的应用研究进展 总被引:7,自引:5,他引:2
综述了淀粉胶粘剂在胶合板工业、标签胶、瓦楞纸箱、建筑涂料和卷烟工业等领域中的应用研究进展。淀粉是一种可再生的天然高分子化合物,具有良好的粘接性能和成膜性能。淀粉胶粘剂具有环境友好、价格低廉和性能优良等特点,是一种发展潜力极大的胶粘剂。 相似文献
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阐述了GB 18582-2001和GB 18583-2001标准中采用乙酰丙酮分光光度法测定游离甲醛含量的检测方法差异,主要包括乙酰丙酮的试剂要求、标准曲线的绘制、测定波长的选择和样品前处理等方面的差异。在详细分析两种检测结果差异原因的基础上,对两种测试标准进行改进,提出了适合水性涂料和水性胶粘剂中游离甲醛含量的测定方法;其线性范围为1~25μg,相关系数为0.9999;按照改进的测试方法,水性涂料和水性胶粘剂样品中甲醛含量的测定结果的相对标准偏差分别为1.9%和2.3%,平均回收率分别为94.2%和95.8%。 相似文献
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低游离甲醛含量脲醛树脂胶粘剂的合成工艺研究 总被引:8,自引:4,他引:4
研究了在弱酸-弱碱-弱酸条件下,加入改性剂合成脲醛(UF)树脂胶的工艺过程。实验结果表明,甲醛与尿素的配比[即n(F)/n(U)比值]、体系pH值、尿素的加料方式和改性剂对UF树脂胶中游离甲醛的含量和胶合强度有很大的影响;当n(F)/n(U)=1.06、缩聚反应阶段体系的pH值为4.75~4.80、尿素分3批加入、反应温度为90℃、加入适量的聚乙烯醇(PVA)和三聚氰胺改性剂时,制得的UF树脂胶中游离甲醛的含量不大于0.10%(符合GB/T14 074.16-1993标准中的指标要求)、粘接强度为4.70 MPa且综合性能优良。 相似文献
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Yong‐Sung Oh 《应用聚合物科学杂志》2010,115(2):641-645
The effects of old corrugated cardboard (OCC) fiber addition on high‐density fiberboard (HDF) were investigated in this study. A phenol‐formaldehyde (PF) resin was synthesized in the laboratory with resin solids at 50% content as an HDF binder. The physical characteristics and molecular weight of the PF resin are described herein. The laboratory HDFs were made using the OCC fiber based on 0, 20, 40, and 60% oven‐dry weight addition with the laboratory‐synthesized PF resin. The HDFs were tested for physical strength and dimensional stability properties according to the procedure of ASTM D 1037‐99. Evaluation of the HDFs manufactured using the PF resin showed that the internal bond and bending strength properties were decreased gradually with increasing OCC fiber content. Overall, the OCC fiber can be used at a content of 40% in the substitution of raw materials for HDF manufacture. © 2009 Wiley Periodicals, Inc. J Appl Polym Sci, 2010 相似文献
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低游离甲醛脲醛树脂胶粘剂的研制 总被引:15,自引:1,他引:15
尿醛树脂胶粘剂中的游离甲醛是人造板中主要的污染源。采用降低原料中甲醛和尿素摩尔比 ,分批加入尿素进行多次缩聚的方法降低游离甲醛的含量 ,并通过添加聚乙烯醇改性剂 ,使产品中游离甲醛的含量为 0 4 % ,产品陈放 1周后 ,游离甲醛降到 0 1%以下 ,完全可以满足环境保护的要求。该制备工艺简单 ,成本低 相似文献
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Marzieh Gangi Taghi Tabarsa Sima Sepahvand 《Journal of Adhesion Science and Technology》2013,27(13):1407-1417
The aim of this work is to evaluate performances of tannin-based resins designed as adhesive in the plywood production. For this purpose, a part of phenol formaldehyde (PF) and melamine formaldehyde (MF) in the classic adhesive formulation was replaced by tannin. The physical properties of the formulated resins (rheological characterization, etc.) were measured. In order to analyze the mechanical performance of tannin-based resins, plywood panels were produced and the mechanical properties including tensile strength wood failure and three-point bending strength were investigated. The performance of these panels is comparable to those of plywood panels made by commercial PF and MF. The results showed that the plywood panels bonded with tannin–PF (PFT) and tannin–MF (MFT) resins exhibited better mechanical properties in comparison to the plywood panels made of commercials PF and MF. The introduction of small properties of tannin in PF and MF resins contribute to the improvement of the water performance of these adhesives. The formaldehyde emission levels obtained from panels bonded with tannin-based resins were lower than those obtained from panels bonded with control PF and MF. Although there are no actual reaction at all between PF, MF, and tannin, addition of tannin significantly improves the water resistance of PF and MF resins. This is a novel finding that manifests the possibility of replacing a convention PF and MF resins by tannin. Modified adhesive is one of the goals in the plywood production without changing any of their production conditions with improvement to their overall properties. 相似文献