基于锥形量热仪的纤维集合体燃烧性能测试方法

Testing method of combustion behavior of loose fibrous assembly by cone calorimeter

为从物性角度更全面地研究纤维燃烧特性,快速科学地评估纤维燃烧性能和确定纤维复配方案,建立了利用锥形量热仪测试纤维集合体燃烧性能的一般性方法。通过分析影响纤维样品测试结果可重复性的因素,利用系列实验确定锥形量热仪测试纤维燃烧性能的测试条件参数如辐射强度、格栅遮盖率、纤维样品面密度等,并进一步通过实验对方法进行验证。结果表明:锥形量热仪测试纤维样品的最优参数分别为辐射强度75 k W/m2、格栅遮盖率25%、纤维样品面密度600 g/m2,该条件下测试得到的纤维样品的最大热释放速率(PHRR)的CV值最小,测试结果的可重复性最好;并且验证实验表明该方法具有较广的适应性和良好的灵敏度。

In order to study the combustion property of fibers comprehensively based on the intrinsic property, and to quickly and scientifically evaluate fibers＇ combustion property and confirm fiber blending scheme as well, a method for evaluating the burning property of fibers by cone calorimeter has been established. The factors that affected the results repeatability have been analyzed. Based on a series of experiments, the testing parameters has been optimized, such as heat flux, grid covering rate, fiber sample grammage, etc, and the method is verified by further experiments. The results show that when the heat flux is 75 kW/m^2 , grid covering rate is 25% , fiber sample grammage is 600 g/m^2 , and the result data have favorable repeatability with the minimum CV for PHRR. Furthermore, the verification experiments show that the test method has extensive adaptability and good sensitivity.