Loading and filtration characteristics of filtering facepieces

Details

• Personal Author:
  Chen CC ; Lehtimaki M ; Willeke K
• Description:
  The variations in performances of different respirators of the same category were examined. The degradation of collection efficiency by aerosol loading was also examined. The aerosol penetration was determined for different brands of filtering facepieces; the experimental data were compared to theoretical predictions. Scanning electron microscopy studies and data obtained by pressure drop studies indicated that the dust mist filtering facepieces examined had similar fiber diameters and packing densities. Electrical force removal accounted for 69% of the total filtration for the respirator found to have the best filter quality at a face velocity of 10 centimeters/second and an aerosol size of 0.16 micrometer. However, the electrical force removal accounted for only 25% for the respirator having the worst filter quality under these same operating conditions. The removal efficiency of these facepieces was reduced over time by as much as this amount. The authors note that under the conditions of normal usage, the total aerosol particle load is not as high as in this study and the filtering facepieces are likely to be discarded before the electrostatic attractions are significantly diminished. [Description provided by NIOSH]
• Subjects:
  Air Pollutants, Occupational Occupational Health Personal Protective Equipment Respiratory Protective Devices Safety
• Keywords:
  Air-filters Filter-materials NIOSH-Grant NIOSH-Publication Personal-protective-equipment Physical-properties Respirators Respiratory-protection Respiratory-protective-equipment
• ISSN:
  0002-8894
• Document Type:
  Text
• Funding:
  Grant
• Genre:
  Journal Article
• Place as Subject:
  Ohio ; OSHA Region 5
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  51-60
• Volume:
  54
• Issue:
  2
• NIOSHTIC Number:
  nn:00212923
• Citation:
  Am Ind Hyg Assoc J 1993 Feb; 54(2):51-60
• Contact Point Address:
  Environmental Health University of Cincinnati Dept of Environmental Health Cincinnati, Ohio 45267
• Federal Fiscal Year:
  1993
• Performing Organization:
  University of Cincinnati, Cincinnati, Ohio
• Peer Reviewed:
  True
• Start Date:
  19810701
• Source Full Name:
  American Industrial Hygiene Association Journal
• End Date:
  19920831
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:8732e86c228fa13cc34e57bd3deb6585162beef8e5982549cf6539569fe5a238637958fc89273d65d35933620c05c0a010d2c9da88c708cb9d703eb929188c08
• Download URL:
  https://stacks.cdc.gov/view/cdc/205031/cdc_205031_DS1.pdf
• File Type:
  [PDF - 959.57 KB ]