非绒面纺织品的火焰蔓延时间不确定度分析

Uncertainty Analysis of Flame Spread Time of Non-Staple Textiles

为提高非绒面纺织品阻燃性能测试结果的准确性,对纺织品燃烧性能不确定度进行评估。依据GB/T14644-2014《纺织品燃烧性能45°方向燃烧速率的测定》的相关方法,采用火焰蔓延时间来评定织物的燃烧性能。以纯棉织物为例,对测试过程中不确定度来源进行了分析比较,并对不确定度分量进行评定及合成。研究结果表明:水洗前后火焰蔓延时间的扩展不确定度分别为0.38s和0.42s,测试过程中不确定度主要来源于试验重复性、计时器示数误差和火焰高度,其中试验重复性对不确定度影响最大。

In order to improve the accuracy of the test results of the flame retardant properties of non-textured textiles,the uncertainty of textile combustion performance is evaluated.According to the relevant method of GB/T 14644-2014 Textiles-Burning Behavious-45° Test Determination of Flame Spread Rate,the flame spread time is used to evaluate the combustion performance of the fabric.Taking pure cotton fabric as an example,we analyzed and compared the sources of uncertainty during the test,and the uncertainty component was evaluated and synthesized.The results showed that the extended uncertainty of flame propagation time before and after washing was 0.38s and 0.42s, respectively.The uncertainty during the test mainly comes from the test repeatability,the timer error and the flame height,and the test repeatability has the greatest influence on the uncertainty.