采用万能材料试验机检测卷烟用爆珠的压破强度和变形量,并通过统计学方法对涉及的关键参数如样本量、平衡时间、预压力、压缩速率和样品台孔径分别进行了比较和研究.结果 表明:样品台孔径对压破强度和变形量检测结果的影响较大,而预压力和压缩速率对检测结果的影响较小;样本量则主要影响检测结果的精密度;在一定温度、湿度条件下,平衡时间会影响变形量.检测方法的最优参数为,样本量取50颗烟用爆珠、样品在温度(22±1)℃和相对湿度(60±3)％的环境中平衡24 h、预压力为0.01 N、压缩速率为10 mm·min-1及使用无孔样品台.基于万能材料试验机,以最优参数建立的烟用爆珠压破强度和变形量的检测结果较为稳定、准确.

In order to improve evaluation of uncertainty in measurement of physical characters of cigarettes,and to explore feasibility of uncertainty evaluation by Robust Statistics-Iterative method,laboratory quality control data were used to assess uncertainty in measurement of weight,circumference,draw resistance,hardness of cigarettes.Results showed that:uncertainty for weight,circumference,draw resistance and hardness by Robust Statistics-Iterative method were 0.010g,0.04mm,28.0Pa and 5.3％.Uncertainty in measurement of weight,circumference,draw resistance and hardness by bottom-up method were 0.012g,0.04mm,32.0Pa and 6.8％.The result by Robust Statistics-Iterative method reflected long-term detecting level of a laboratory,showing the convenience of this method.