DING Wen-bin, JIA Xiao-dong. Comprehensive assessment on protective performance of common self-inhalation flter type respirators[J]. Journal of Environmental and Occupational Medicine, 2018, 35(5): 428-433, 446. DOI: 10.13213/j.cnki.jeom.2018.17746
Citation: DING Wen-bin, JIA Xiao-dong. Comprehensive assessment on protective performance of common self-inhalation flter type respirators[J]. Journal of Environmental and Occupational Medicine, 2018, 35(5): 428-433, 446. DOI: 10.13213/j.cnki.jeom.2018.17746

Comprehensive assessment on protective performance of common self-inhalation flter type respirators

  • Objective To test the protective performance of common self-inhalation filter type respirators and provide scientific evidence of proporiate usage for the public and professionals.

    Methods A total of 21 models of retail respirators, including 3 styles (foldable, n=10; cup-shaped, n=5; plain, n=6) and 3 use purposes (regular protection, n=6; medical protection, n=2; labor protection, n=13), were tested for filtering efficiency, respiratory resistance, total inward leakage, and blood penetration.

    Results The filtering efficiencies of plain respirators P1-P6 were 2.30%-80.94%. The filtering efficiencies of the tested respirators were all up to relevant national standards except the model marked as AN1. The inhalation resistance of respirators with exhalation valve was significantly higher than that of the others (P < 0.05), but the exhalation resistance test results reversed (P < 0.05). The plain type respirators' seal performance was poor; the total inward leakage was not different between the foldable respirators and the cup-shaped respirators (P>0.05); the total inward leakage across subjects with different facial characteristics was statistically varied (P < 0.05). Moreover, the blood penetration rate of P1 and P6 were 60% and 40%, respectively.

    Conclusion All tested respirators meet the requirements of relevant national standards. The plain type respirators made of gauze and cotton are not capable of preventing dust or blood penetration. The plain type respirators made of nonwovens can resist blood penetration but not dust. Foldable and cup-shaped respirators need remodification according to the facial characteristics of Chinese people. The choice and wearing of respirators should depend on facial characteristics of users and protective requirements.

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