Evaluation of particulate filtering respirators using inward leakage (IL) or total inward leakage (TIL) Testing - Korean experience
Evaluation of particulate filtering respirators using inward leakage (IL) or total inward leakage (TIL) Testing - Korean experience
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DOI：
10.1093/annhyg/mei034
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发表时间：
2005-10-01
影响因子：
--
通讯作者：
Lee, J
中科院分区：
文献类型：
--
作者：
Han, DH;Lee, J
韩国对微粒过滤口罩的认证法规要求根据欧洲标准EN 13274-1进行向内泄漏(IL)或总向内泄漏(TIL)测试，标准符合性水平与欧洲标准相似。这项研究是用IL或TIL测试来评估韩国市场上正在商业化使用的微粒过滤口罩，以及韩国标准水平的有效性。共有13个品牌的口罩和10个过滤口罩(2个顶级口罩，4个一级口罩和4个二级口罩)被选为测试对象，由10名受试者组成。每个受试者根据脸长和嘴唇的长度，用9个脸部尺寸的网格方块进行分类。IL或TIL测试在3M创新中心的实验室进行，其中的实验仪器和系统是按照欧洲标准建立的。测试程序遵循EN 13274-1(2001年)。正如预期的那样，半个口罩的渗漏量比过滤口罩的少，后者在不同品牌之间存在显著差异。一类滤镜的TIL值远高于二类，这一结果可能会导致佩戴者在选择口罩时感到困惑。过滤面片的主要泄漏途径可能不是过滤介质，而是面封。因此，有必要开发适合韩国人的滤镜。由于不同面部尺寸的渗漏明显不同，应根据国家或种族开发用于IL或TIL检测的明确测试小组。在IL或TIL测试之前或在选择呼吸器时，需要一种更精确的方法来证明FIT，例如，在美国法规中的FIT测试。另一项发现表明，IL或TIL的五个练习的几何平均数可能比算术平均数更能建立标准的个人科目平均数。
Korean certification regulation for particulate filtering respirators requires inward leakage (IL) or total inward leakage (TIL) testing according to European Standard EN 13274-1, and the standard levels of compliance are similar to those of the European Standard. This study was conducted to evaluate particulate filtering respirators being commercially used in the Korean market using an IL or TIL test and the validity of standard level in Korea. Three half masks and 10 filtering facepieces (two top class, four 1st class and four 2nd class)-a total of 13 brand name respirators-were selected for the test with panels of 10 subjects. Each subject was classified with nine facial dimension grid squares in accordance with face length and lip length. IL or TIL testing was conducted at the laboratory of the 3M Innovation Center in which the experimental instruments and systems were established in compliance with European standards. The testing procedure followed EN 13274-1 (2001). As expected, leakages of half masks were less than those of filtering facepieces and the latter were significantly different among brands. TILs of the 1st class filtering facepieces were found to be much more than those of the 2nd class and the result may cause a wearer to get confused when selecting a mask. The main route leakage for filtering facepieces may not be the filter medium but the face seal. Therefore, it is necessary to develop well-fitting filtering facepieces for Koreans. Because leakages were significantly different for different facial dimensions, a defined test panel for IL or TIL testing according to country or race should be developed. A more precise method to demonstrate fit, for example, fit testing such as in the US regulations, will be needed before IL or TIL testing or when selecting a respirator. Another finding implies that geometric mean of five exercises for IL or TIL may be better than arithmetic mean to establish a standard individual subject mean.