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방진 마스크 필터(여과재) 교체와 필터 성능 변화의 상관성 조사 : Evaluation of Relationship between Filter Replacement and Filter Performance Change of Particulate Respirator.

DC Field Value Language
dc.contributor.advisor윤충식 교수-
dc.contributor.author이헌용-
dc.date.accessioned2017-07-19T03:09:04Z-
dc.date.available2017-07-19T03:09:04Z-
dc.date.issued2014-08-
dc.identifier.other000000020904-
dc.identifier.urihttps://hdl.handle.net/10371/128212-
dc.description학위논문 (석사)-- 서울대학교 보건대학원 : 환경보건학과, 2014. 8. 윤충식.-
dc.description.abstract연구목적 : 방진 마스크의 여과 효율이나 압력강하에 대한 실험실 연구는 많으나 방진 마스크의 필터를 교체(수명)하게 되는 인자들에 대한 연구가 거의 없다. 본 연구의 목적은 사업장에서 사용된 방진 마스크의 필터교체와 필터성능의 상관성을 규명하는 것이다. 구체적 목적으로 첫째 사업장에서 방진마스크가 교체되는 이유를 파악하고, 둘째 필터의 호흡 저항(Pressure Drop), 분진 투과율(Penetration) 및 필터 품질 계수(Quality factor)를 평가한 후 필터 교체에 영향을 줄 수 있는 필터 성능 변화를 파악하고자 하였다
연구방법 : 우리나라 입자상 물질 발생사업장에서 보편적으로 사용되는 방진마스크 필터 3종류 (특급 2종, 1급 1종)을 대상으로 8개 사업장에서 필터를 교체하게 된 이유를 설문 조사 하였으며 교체된 필터를 수거하였다. 수거된 필터는 TSI사 AFT8130 Automatic Filter Tester (AFT)를 이용하여 필터 Pressure drop, Penetration을 측정하였고 Quality factor를 계산하였다. 또한 사용 전후의 필터 성능 변화를 파악하기 위해 해당 종류의 새 필터들도 동일한 방법으로 필터 Pressure drop, Penetration, Quality factor를 계산하였다.
연구결과 : 수거된 270개의 필터의 교체이유는 주로 숨쉬기 곤란(47%), 외관상 더러움 및 냄새 유입(19%)과 앞선 요인의 복합적 작용(27%)이었다. 필터 성능 관련한 pressure drop의 경우, 필터 A와 C를 합한 새 필터군의 경우 20.72±3.33mmH2O 이었고, 사용된 후 필터군은 24.70±5.26mmH2O이었으며 두 필터군 간에는 유의차가 존재하였다(p<0.0001). 그러나 버려진 필터의 pressure drop 값은 특정한 임계치가 있는 것이 아니라 필터 종류에 상관없이 불규칙하였고, 새 필터와 버려진 필터의 pressure drop 변화 값에는 어느 일정한 범위가 존재 하였다. Penetration은 특급 필터인 A와 C를 합한 새 필터군의 경우 평균 0.0032±0.0040%, 사용 필터의 경우는 0.0596±0.1187%로 새 필터에 비해 사용필터가 효율이 감소되었고 새 제품과 사용제품간에 유의하였다 (p<0.0001). Quality Factor의 경우 새 필터들과 버려진 필터들의 값을 분석한 결과 특급 필터인 A와 C의 새 필터(50개) 집단의 경우 평균 0.53641± 0.08891이었으며, 버려진 필터는 0.34209±0.09120로 나타났으며, 모든 제품의 QF값이 사용 전보다 사용 후에 낮았었으며 유의성 분석결과도 유의차가 존재 하였다.(p<0.0001)
결론 : 사업장에서 사용되고 있는 방진 마스크의 사용 전 필터와 사용 후 수거된 필터들의 호흡저항 (Pressure drop), 분진 투과율 (Penetration) 그리고 품질 계수 (Quality Factor)를 분석하고 유의성을 파악한 결과, pressure drop과 penetration은 증가하였고 quality factor 값이 악화 되었으며, 전체적인 필터 성능이 저하되었다. 또한 모든 필터 성능이 사용전과 후에 유의차를 나타내었다. 특히 Pressure drop의 경우에는 모든 필터들이 어느 특정한 임계치에서 필터 교체가 이루어지지 않았고, 다만 pressure drop 증가와 초기저항 대비 pressure drop상승률은 모든 필터가 동일하지는 않지만 어느 일정 범위 내에서 이루어지는 결과를 보였다.
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dc.description.abstract필터 교체, 필터 호흡저항, 마스크 호흡저항, 마스크 필터 수명

Objective: There have been many laboratory study for filtration efficiency and pressure drop of particulate respirator but there have only been a few studies about the factors which effect on the filter replacement (filter service life). The purpose of this study is to evaluate the relationship between filter replacements and filter performance change of particulate filter used in workplace. For more detail of purpose, this study investigates why the particulate filter is replaced in workplace and evaluates the filter performance change such as filter pressure drop, efficiency and Quality factor to understand how they effect on the filter replacement.

Method: 3types of particulate respirator filters, which are assessed against the filter performance safety certification standard for dust masks established by Korean Ministry of Employment and Labor (KMOEL) and are mainly used in workplace, were selected for this study and surveyed why the filters are replaced and then they were collected to evaluate the performance. The collected filters performance such as filter pressure drop, efficiency and quality factor were evaluated by AFT 8130 (Automatic Filter Tester, TSI) and the same kinds of new filters were also evaluated by same method to investigate the difference between used filter performance and new filter one.

Results: According to the survey of 270 collected filters, the main reasons to replace filters are hard breathing (46.2%), dirt and odor influx (19.7%) and combination of the earlier factors (26.7%). Statistical analysis was conducted to assess the pressure drop difference between two special class groups(A+C), new filters and used filters and they were significantly different. (new filter average : 20.72±3.33mmH2O, used filter group average : 24.70±5.26mmH2O, p<0.0001), However, the pressure drop of the used filters doesnt have certain threshold value and it was irregular regardless of the type of filter. But there is a certain range in pressure drop change values. In the case of Penetration, new filter group (A+C) average is 0.0032±0.0040%, and used filter (A+C) is 0.0596±0.1187% and the used filter efficiency decreased comparing of new filter one and they are significantly different. (p<0.0001)

Conclusion: The filter performance which are pressure drop, penetration and
quality factor, is evaluated and compared between new filter and used filter in working place and it shows that general filter performance gets worse because the pressure drop and penetration increase and quality factor decreases. Also, there is significant difference with filter performance between new filter and used filter. In case of pressure drop, it doesnt have any specific threshold value to replace filter but change in pressure drop values and pressure drop increase rate compared to the initial resistance of the filter exist within a certain range.
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dc.description.tableofcontents목차


초록 ••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••• i
목차 •••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••• iv
List of Tables •••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••• vi
List of Figures •••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••• vii

1. 서론 •••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••1

2. 연구대상 및 방법•••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••4
2.1 연구 대상 •••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••5
2.2 연구 방법 •••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••8
2.3 통계 분석 •••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••• 11

3. 결과 •••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••13
3.1 사용된 필터의 호흡저항 (Pressure Drop) 성능 변화 분석•••••13
3.2 사용된 필터의 분진 투과율 (Penetration) 성능 변화 분석••••23
3.3 사용된 필터의 Quality Factor 성능 변화분석•••••••••••••••••••••26
3.4 필터 교체 이유 조사 결과••••••••••••••••••••••••••••••••••••••••••••28

4. 고찰 •••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••29
5. 결과 ••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••32

6. 참고 문헌•••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••33

Abstract •••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••37
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dc.formatapplication/pdf-
dc.format.extent7131892 bytes-
dc.format.mediumapplication/pdf-
dc.language.isoko-
dc.publisher서울대학교 대학원-
dc.subjectFilter replacement-
dc.subjectFilter pressure drop-
dc.subjectrespiratory inhalation resistance-
dc.subjectRespirator filter service life-
dc.subjectBreathing resistance-
dc.subject필터 교체-
dc.subject필터 호흡저항-
dc.subject마스크 호흡저항-
dc.subject마스크 필터 수영-
dc.subject호흡저항-
dc.subject.ddc363-
dc.title방진 마스크 필터(여과재) 교체와 필터 성능 변화의 상관성 조사-
dc.title.alternativeEvaluation of Relationship between Filter Replacement and Filter Performance Change of Particulate Respirator.-
dc.typeThesis-
dc.contributor.AlternativeAuthorLee HeonYung-
dc.description.degreeMaster-
dc.citation.pagesvii, 39-
dc.contributor.affiliation보건대학원 환경보건학과-
dc.date.awarded2014-08-
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