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검정실험 TIL(누설률)에 의한 방진마스크의 평가와 TIL의 적합성에 관한 연구
한돈희 ( Don Hee Han ),우상식 ( Sang Sik Woo ),정회명 ( Hoi Myung Jung ) 한국산업위생학회 2004 한국산업보건학회지 Vol.14 No.3
Korean certification regulation for particulate respirator requires total inward leakage (TIL) test as European Standards (EN) and the standard levels of regulation are the same as those of EN. This study was conducted to evaluate particulate respirator being commercially used in the market by TIL and to evaluate validity of the certification test in Korea. Two full face masks, three half masks and 10 filtering facepieces (two top-class, four 1st-class and four 2nd-class), total 15 brands respirators, and 10 test panels (subjects) who were classified in 9 facial grids in accordance with face length and lip length, were selected for test. TIL tests were conducted in the laboratory of 3M Innovation Center which was established by EN standard. As expected TILs of full face masks were the lowest in three types and TILs of half masks and filtering facepieces showed statistically significant difference in manufacturers. It was found that TIL test methodology used in this study seemed to be the lack of sensitivity for full face masks. TILs of 1st class filtering facepieces were found to be much more than those of 2nd class and thus the result would cause a wearer to get confused when selecting a mask. Main causes of leakage for filtering facepieces may be not filter media, but faceseal leakage since minimal TILs of individual arithmetic averages were so much lower that standard levels. Therefore it is necessary to develop well-fitting filtering facepieces for Korean. Because TILs were significantly different among facial dimensions, test panel for TIL test should be developed and certification regulations may be thought to be revised.