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对芳纶防弹无纬布用热熔胶进行筛选,优选了橡胶弹性体类胶粘剂作为芳纶防弹无纬布生产用热熔胶,并对该类热熔胶粘剂与传统的丙烯酸酯胶粘剂和聚氨酯胶粘剂在常温、高低温、浸水和耐老化条件下进行了对比试验,结果表明,该热熔胶粘剂中SIS-Kraton D1107胶粘剂防弹等综合性能均明显优于其它胶粘剂,可以作为芳纶防弹无纬布生产用胶粘剂。 相似文献
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采用树脂与芳纶无纬布模压的方法,制备了一种具备防弹防刺功能的复合材料,讨论了模压温度、时间、压力等因素对其性能的影响。实验结果表明,以树脂和芳纶无纬布为原料制备的防弹防刺复合材料,其工艺优化条件为:模压时间15~30min,温度125℃,压力2~4MPa。在此条件下,制得的复合材料的防弹防刺综合性能最佳。 相似文献
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《玻璃钢/复合材料》2019,(5)
针对目前国内外对芳纶无纬布防刺性能研究较少的情况,以及目前防刺服柔软度较差的事实,从织造芳纶无纬布的水性胶粘剂的胶膜本身耐穿刺性能入手,并对无纬布进行后期处理,开创性地将芳纶无纬布应用于防刺领域。确定水性胶粘剂C具有一定硬度并且与芳纶纤维匹配较好,为防刺用芳纶无纬布的胶粘剂配方;经过后期处理后,通过准静态穿刺性能测定不同胶含量的单层无纬布刺穿力,确定树脂含量为24%~27%时,芳纶无纬布具有最优的刺穿力,此时无纬布面密度为225 g/m~2;通过动态穿刺性能测试确定,将芳纶无纬布叠加至34层(单层面密度为225 g/m~2),加一层4.5 mm厚EVA泡沫(面密度为200 g/m~2)作为缓冲层,其防刺性能在-20℃~55℃范围内均满足GA 68—2008标准的测试要求,此时防护层面密度(含缓冲层)仅为7.85 kg/m~2,且具有较高的柔软度,可任意角度折叠180°。 相似文献
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《高科技纤维与应用》2017,(6)
针对影响芳纶无纬布防弹和防刺性能的树脂模量、纳米a粒子、单层双防布面密度、环境温度等因素进行了实验。研究结果表明,树脂模量必须适中,兼顾防弹和防刺的特点;纳米a粒子的质量分数在5%时,织造的UD布防弹及防刺效果最优;单层双防布面密度在210~215 g/m~2时,双防材料的防弹及防刺性能最优;由于双防产品树脂为高分子材料,环境温度对于材料的防弹及防刺效果有一定的影响。 相似文献
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通过对卷状芳纶无纬布生产工艺的研究,探究几个关键工艺条件(包括丝束退绕张力、胶粘剂的配方、层压复合的温度、压力及运行速度等)对卷状芳纶无纬布的性能(包括表观性能和防弹性能)的影响,摸索出一组最佳的工艺条件,由此制备的无纬布产品综合性能最优。由此工艺织造成的卷状无纬布防弹芯片通过美国NIJ0101.06测试标准和公安部GA141-2010标准测试,验证了此生产工艺的优越性。 相似文献
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本课题根据机理分析与对比,优选了一种适用于水性聚氨酯的含磷阻燃剂,并以不同含量的阻燃剂改性胶黏剂体系,制备胶膜与芳纶无纬布,测试力学性能、耐水性及氧指数。结果表明,当含磷阻燃剂A添加量为15%时,改性树脂力学性能得到提升,以其制备的芳纶无纬布的氧指数达到最大值35%,研制出了一种本质阻燃的芳纶无纬布产品,可用于阻燃型防弹产品的生产。 相似文献
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防弹无纬布复合材料的现状 总被引:2,自引:0,他引:2
本文简要介绍了个体防护用无纬布(UD)复合材料的防弹机理、成型工艺,着重对国内外防弹无纬布的产品规格、材料结构、防弹性能等方面进行了对比研究.通过分析,目前国内无纬布产品与国外仍有较大差距,国内企业应提高自主创新能力,缩小与国外产品差距. 相似文献
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乙烯酮(双乙烯酮)是十分重要的化工中间体,其下游产品较多。江苏某化工厂开发生产乙烯酮(双乙烯酮)下游产品三十多个,年生产规模三万多吨,是国内以乙烯酮(双乙烯酮)为中间体生产精细化学品的综合骨干企业。针对乙烯酮(双乙烯酮)下游产品废水特点,该厂结合企业实际,开展了产品优化,结构调整,清洁生产,资源循环利用,节水降耗等工作,从源头削减了污染物的生产。同时投资二千多万元新建预处理装置三套,6000m3/d废水生化处理装置一套,使全厂乙烯酮(双乙烯酮)下游产品的废水得到了有效的治理。 相似文献
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D. G. Gordeev L. F. Gudarenko M. V. Zhernokletov V. G. Kudel’kin M. A. Mochalov 《Combustion, Explosion, and Shock Waves》2008,44(2):177-189
A semi-empirical equation of state for metals is described. Its capabilities are demonstrated by the example of the equation
of state for aluminum. New experimental data are presented on the location of the isentrope of aluminum for unloading from
the state at p = 229.71 GPa on the shock adiabat to an aerogel (SiO2) of density 0.08 g/cm3.
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Translated from Fizika Goreniya i Vzryva, Vol. 44, No. 2, pp. 61–75, March–April, 2008. 相似文献
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Jorge Marcelo Romero Soledad Bustillo Hugo Enrique Ramirez Maisuls Nelly Lidia Jorge Manuel Eduardo Gómez Vara Eduardo Alberto Castro Alicia H. Jubert 《International journal of molecular sciences》2007,8(7):688-694
A thermochemical rather simple experimental technique is applied to determine the enthalpy of formation of Diperoxide of ciclohexanone. The study is complemented with suitable theoretical calculations at the semiempirical and ab initio levels. A particular satisfactory agreement between both ways is found for the ab initio calculation at the 6–311G basis This set level. Some possible extensions of the present procedure are pointed out. 相似文献
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A perturbation viscometer is a differential capillary viscometer that measures the logarithmic viscosity gradient of the viscosity-composition curve for gas mixtures. Measurements are made at different gas mixture compositions. Integration of the logarithmic viscosity gradients measured over the full composition range gives the mixture viscosity relative to the viscosity of one of the pure components of the gas mixture. This method is attractive because, for measurements of equal precision, integration of the gradients is potentially an order of magnitude more precise than measurement of the viscosities directly. It can also work at high and low temperatures and perhaps high pressures.The perturbation viscometer has been used to make measurements on ideal gas mixtures at ambient and elevated temperatures. The situation is more complicated when the gas mixtures are non-ideal. Extra effects due to density differences, molar volume change on mixing and differential thermal expansion may be measured in addition to the desired viscosity change producing systematic errors in the results. Thus, a more sophisticated apparatus is required. The standard perturbation viscometer has been modified to separate out the extra effects to permit measurement of the true change in viscosity. In addition, the theoretical operation of the modified apparatus has been revised to account for the design changes to permit calculation of the viscosity-composition profiles from the results.The apparatus has been tested using helium-HFC-125 mixtures and two new viscosity-composition profiles are presented for these mixtures at 23 and . Internal consistency tests have been used to confirm that the data produced are of high quality with an estimated uncertainty in the viscosity ratio data at of 0.9% and at of 1.5%. 相似文献
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醋酸纤维素取代基分布与性质的关系 总被引:9,自引:0,他引:9
分析了以吡啶为溶剂的醋酸纤维素的13C-NMR核磁共振谱,得出了三种不同位置羟基的取代度。结合X—射线和DSC分析,初步说明具有相同取代度但未经水解和经过水解的醋酸纤维素(CA) 性质上的差异是由于三个羟基上的取代度分布不同及消晶程度差异所致。 相似文献