测试次数和样品质量对苎麻纤维白度试验的影响研究  

Study on the influence of testing frequency and sample quality on the whiteness test of ramie fibers

作　　者：胡小蓉 甘丹 张祚 HU Xiaorong;GAN Dan;ZHANG Zuo(Hunan Fiber Testing and Research Institute,National Ramie Inspection and Testing Center,Changsha,Hunan 410007,China)

机构地区：[1]湖南省纤维检测研究院、国家苎麻检验检测中心,湖南长沙410007

出　　处：《中国纤检》2024年第3期61-64,共4页China Fiber Inspection

摘　　要：GB/T 5885—1986《苎麻纤维白度试验方法》中只要求样品铺入试样盒不露白底,未规定样品的具体质量,试验样品质量多少影响样品厚度,进而影响白度检测结果的重现性,使得结果间可比性不强。另外,标准中要求测试次数为50次,测量次数过多,影响苎麻纤维白度检验效率。因此本文通过对0.6g、0.7g、0.8g、0.9g等质量的苎麻纤维样品白度测试结果进行精密度计算,发现样品质量大于0.6 g以后,试验精密度均远远低于5%,重现性较好,从而可以将试样质量定为0.6 g;对同一苎麻纤维样品10次、20次、30次、40次、50次等不同测试次数试验结果进行差异性分析,发现测试次数大于20次以后,试验结果没有显著性差异,从而可以将试验测试次数定为20次。因此本文建议苎麻纤维白度测试标准将试验质量定为0.6g,试验次数修改为20次。GB/T 5885-1986“Test Method for Brightness of Ramie Fiber”only requires the sample to be placed in the sample box without exposing the white background,without specifying the specific mass of the sample.The amount of test sample mass affects the thickness of the sample,which in turn affects the reproducibility of the whiteness test results,resulting in weak comparability between results.In addition,the standard requires a testing frequency of 50 times,and excessive measurement times can affect the efficiency of testing the whiteness of ramie fibers.Therefore,this article calculates the precision of the whiteness test results of ramie fiber samples with masses of 0.6 g,0.7 g,0.8 g,0.9 g,etc.It is found that after the sample weight is greater than 0.6 g,the precision of the test is much lower than 5%,and the reproducibility is good.Therefore,the sample weight can be set at 0.6 g;A differential analysis was conducted on the test results of the same ramie fiber sample after 10,20,30,40,50 different test cycles.It was found that there was no significant difference in the test results after more than 20 test cycles.Therefore,the test cycle can be set as 20.Therefore,this article suggests that the standard for testing the whiteness of ramie fibers should set the test weight to 0.6 g and modify the number of tests to 20.

关 键 词：苎麻纤维 质量 测量次数 白度 

分 类 号：TS107.2[轻工技术与工程—纺织工程]