Semester

Summer

Date of Graduation

2019

Document Type

Thesis

Degree Type

MS

College

Statler College of Engineering and Mineral Resources

Department

Industrial and Managements Systems Engineering

Committee Chair

Xinjian (Kevin) He

Committee Co-Chair

Eun Gyung (Emily) Lee

Committee Member

Eun Gyung (Emily) Lee

Committee Member

Ziqing Zhuang

Abstract

This study was aimed to investigate the effectiveness of half mask respirator with double P-100 filters by determining the penetration of cigarette smoke particles. In this study, faceseal leakage of a breathing manikin donned a 3M 6200 half mask elastomeric respirator with double P-100 filters was determined at various test conditions. A full factorial test conditions of 4 sealing conditions (Non-sealed, only nose sealed, nose and chin sealed, and fully sealed), 2 inspiratory breathing types (Constant, cyclic), 4 flowing rates (15, 30, 50, 85 L/min for cyclic; 15, 30, 50, 80 L/min for constant) were employed and each test condition was repeated three times. Ultra fine smoke particles were generated by burning a cigarette in an exposure chamber. For each test condition, particle number concentrations using a P-Trak condensation particle counter were measured, inside and outside of the elastomeric half mask respirator and penetration was calculated as a ratio of two concentrations (P=Cin/Cout).

Our hypothesis claimed that variables of sealing type, breathing flow type, and flowing rate were all significant features which have an effect on penetration percentage of ultrafine cigarette smoke aerosol through 3M 6200 half mask respirator with P-100 filters. Non-sealed and partially sealed conditions showed that the penetration percentage (P=Cin/Cout) of cigarette smoke was more than 0.03% (i.e., penetration 0.03%, which is an acceptable criterion, and showed statistically significant result (p-value: 7.58 E-20< α, which was assigned as 0.05). However, fully-sealed test results were measured the smoke penetration percentage equal or lower than 0.03% (penetration 0.03%). Our findings showed that 3M 6200 half mask respirator with P-100 filters served proper protection against ultrafine cigarette smoke aerosol.

This report consists of 5 chapters. In Chapter 1, introduction part was described in detail, 3M 6200 half mask respirator and P-100 filters were explained. Chapter 2 starts with a brief literature review of similar researches. In Chapter 3, experimental set-up was demonstrated. In Chapter 4, the collected data were presented along with the statistical test results analyzed with ANOVA one-way analysis of variance in order to find out which variables are significant in this study.

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