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SY928系列无机复合阻燃消烟剂在PVC塑料中的应用 总被引:2,自引:0,他引:2
本文介绍了SY928系列无机复合阻燃消烟剂在PVC塑料中的应用效果,报道了其阻燃性能,讨论了表面改性和样品尺寸对阻燃性测试结果的影响.检测结果表明,阻燃性能已严格于相应国家标准,达到难燃材料B1级. 相似文献
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本文介绍并讨论了聚氯乙烯(PVC)的发烟机理及抑烟机理,并综述了近年来国内外PVC阻燃抑烟技术的研究及应用发展。 相似文献
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该方法是在0.52m^3烟箱内,布满烟雾,应用添加消烟剂的水雾进行消烟,仅用4min即可把烟箱内的烟雾安全消除。其中消烟剂大都为表面活性剂,水雾液滴直径与烟尘粒径比150为宜。 相似文献
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讨论了聚氯乙烯(PVC)的发烟机理及抑烟机理,并综述了近年来国内外PVC阻燃抑烟技术的研究及应用发展。 相似文献
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文章主要就抑烟剂对阻燃中纤板的燃烧性能影响进行了研究,最后研究出了一种低烟毒阻燃中纤板.经测试在阻燃剂添加量30 kg/m3情况下,当复合抑烟剂添加量2%时阻燃中纤板的氧指数为37.5%,UL94点燃续燃时间为3.5 s,阴燃时间为11.2 s,烟密度等级SDR由5.7下降到4.0.经GB8624-2012对阻燃中纤板进行燃烧性能测试,结果表明未发生火焰的横向、纵向蔓延,具有较好的阻燃、成炭性能. 相似文献
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以聚磷酸铵、季戊四醇、三聚氰胺分别为酸源、碳源、气源制备抑烟阻燃剂,并用其制备抑烟阻燃非固化橡胶沥青防水涂料,通过测定极限氧指数、初始产烟时间和烟密度等级研究了改性防水涂料的阻燃抑烟性能,并对涂料的自身性能进行了探究。结果表明,抑烟剂添加量为15%时,非固化橡胶沥青防水涂料的抑烟阻燃性能较好,且综合性能符合标准要求。 相似文献
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Spread of fire along electrical cables may be alleviated by using flame-retardant smoke suppressant (FRSS) additives-based PVC compositions designed for use as insulation and sheathing. These compositions offer improved resistance to ignition, flame spread and smoke generation. FRSS protection may also be achieved by the application of intumescent coatings as fire-protective layers and barriers for electrical cables and cable installations.Metal-based organic (MBO) complexes were synthesized for use as flame retardant smoke suppressants in PVC formulations. Plasticized PVC compositions were prepared and evaluated for their fire performance. Excellent smoke suppression was observed when either of the two MBOs was used. The limiting oxygen index was also found to be fairly high, particularly when the PVC samples were plasticized with a phosphate plasticizer. Flame-retardant smoke-suppressant intumescent coatings were developed for PVC-sheathed electrical cables. The coatings were applied on cables, and their fire performance was evaluated by using national and international standard procedures. The coated cables did not show any surface spread of flame on exposure and their generation of smoke was found to be very low. The coatings were found to be quite effective in reducing the burning behaviour of power cables. Significant improvement in circuit failure time was noted for coated cable specimens. 相似文献
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介绍阻燃电缆分级标准的变化和阻燃电缆阻燃材料的演变及发展,通过对隔离型阻燃电缆及其要达到的B1级燃烧性能阻燃电缆生产工艺的阐述及与其它类型阻燃电缆性能的比较,指出隔离型阻燃电缆在建筑工程中的应用优势。 相似文献
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采用氢氧化铝、有机蒙脱土与可膨胀石墨复配阻燃抑烟剂,通过极限氧指数(LOI)法、烘箱恒温加热试验、热重分析、傅里叶变换红外光谱、扫描电镜及X射线能谱分析了复合阻燃抑烟剂对沥青的作用效果与协同机理.结果表明:复配剂的加入起到明显的阻燃抑烟效果,含量为6%的复配剂可将沥青的LOI值提升至25.19%,单位沥青烟气释放量减少70%;复配剂拓宽了单一助燃剂的作用温度范围,在沥青燃烧过程中吸收热量,稀释可燃气体浓度,不仅能够提升沥青的热稳定性,还可形成复合阻隔层,起到协同阻燃抑烟作用. 相似文献
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采用包覆法,将含有无卤阻燃剂的热固性酚醛树脂胶包覆在预发泡的可发性聚苯乙烯(EPS)珠粒表面,再通过水蒸气发泡、模压成型工艺制备出无卤阻燃EPS泡沫材料.研究了3种无卤阻燃剂(三聚氰胺磷酸盐、三聚氰胺氰尿酸盐和聚磷酸铵)在EPS泡沫材料中的阻燃作用,探讨了聚磷酸铵用量对EPS泡沫材料阻燃性能、力学性能和隔热性能的影响.结果表明,在3种无卤阻燃EPS泡沫材料中,采用聚磷酸铵与酚醛树脂包覆制备的无卤阻燃EPS泡沫材料综合性能最好.当EPS、酚醛树脂和聚磷酸铵质量比为100∶100∶40时,无卤阻燃EPS泡沫材料的综合性能较好,其压缩强度为0.42MPa,弯曲强度为0.70MPa,氧指数(体积分数)为30.5%,导热系数为0.025 6W·m-1·K-1. 相似文献
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参照美国消防协会标准NFPA 262《电线电缆燃烧和发烟特性的标准测试方法》设计构造电缆水平燃烧试验装置,对交联聚乙烯护套聚氯乙烯绝缘电缆(YJV)和阻燃交联聚乙烯护套聚氯乙烯绝缘电缆(ZR-YJV)进行不同火源功率和不同气流速度下水平延燃特性研究,对同种聚烯烃护套的隔离型阻燃电缆W DZA+-YJLY(ZG-A)、耐火电缆BBTRZ及矿物绝缘电缆NG-A开展水平延燃特性验证试验。试验表明,YJV和ZR-YJV随供火功率增大,水平延燃长度相应增加,且试验初始气流速度在1.2 m/s左右存在水平延燃长度峰值;WDZA+-YJLY(ZG-A)、BBTRZ和NG-A呈现良好的耐火性能,相应水平延燃长度分别为0.70 m、0.51 m和0.39 m,烟密度峰值均≤0.16,平均值均≤0.10,符合NFPA 262标准要求。 相似文献
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介绍了IFR的阻燃机理,着重对混合型膨胀型阻燃剂,聚磷酸铵膨胀阻燃体系等几种常见的阻燃膨胀体系进行了具体阐述,指出膨胀型阻燃剂必将会在火灾预防、室内装修材料阻燃等方面发挥巨大的作用。 相似文献
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Sunil K. Sharma 《Fire Technology》2003,39(3):247-260
Metal-based organic complexes (MBO) are a class of FRSS additives that comprise a transition metal and an organic ligand that cleaves at an elevated temperature thereby releasing the metal in a reactive state. They help in the formation of char and thus act as an effective smoke suppressant. Use of MBO complexes as flame retardant smoke suppressants, phosphate ester as a flame retardant and active filler as endothermic material is reported here as multicomponent FRSS systems. MBOs used in the present study are the chelates of pentanediono. They were used alone as well as in combination with aluminum trihydrate (ATH) as filler were used to impart flame retardancy and smoke suppression to poly vinylchloride. Their performance was measured in terms of flammability, smoke generation, char formation and evolution of combustion gases. MBOs of molybdenum and chromium were found to be very efficient flame retardant smoke suppressants. 相似文献