Erratum: Evaluation of Nano- and Submicron Particle Penetration Through Ten Nonwoven Fabrics Using a Wind-Driven Approach

Details

• Personal Author:
  Eimer, Benjamin C. ; Gao, Peng-Fei ; Gupta, Bhupender ; Hsiao, Ta-Chih ; Jaques, Peter A. ; Miller, Aubrey K. ; Shaffer, Richard A. ; Shepherd, Angie ; Yang, Mengshi
• Description:
  Existing face mask and respirator test methods draw particles through materials under vacuum to measure particle penetration. However, these filtration-based methods may not simulate conditions under which protective clothing operates in the workplace, where airborne particles are primarily driven by wind and other factors instead of being limited to a downstream vacuum. This study was focused on the design and characterization of a method simulating typical wind-driven conditions for evaluating the performance of materials used in the construction of protective clothing. Ten nonwoven fabrics were selected, and physical properties including fiber diameter, fabric thickness, air permeability, porosity, pore volume, and pore size were determined. Each fabric was sealed flat across the wide opening of a cone-shaped penetration cell that was then housed in a recirculation aerosol wind tunnel. The flow rate naturally driven by wind through the fabric was measured, and the sampling flow rate of the Scanning Mobility Particle Sizer used to measure the downstream particle size distribution and concentrations was then adjusted to minimize filtration effects. Particle penetration levels were measured under different face velocities by the wind-driven method and compared with a filtration-based method using the TSI 3160 automated filter tester. The experimental results show that particle penetration increased with increasing face velocity, and penetration also increased with increasing particle size up to about 300 to 500 nm. Penetrations measured by the wind-driven method were lower than those obtained with the filtration method for most of the fabrics selected, and the relative penetration performances of the fabrics were very different due to the vastly different pore structures. Erratum: J Occup Environ Hyg 2011 Apr; 8(4):D30 http://dx.doi.org/10.1080/15459624.2011.564092 [Description provided by NIOSH]
• Subjects:
  Aerosols Air Pollutants, Occupational Laboratories Occupational Health Particulate Matter Personal Protective Equipment Risk Assessment Safety
• Keywords:
  Aerosol-particles; Aerosols; Airborne-particles; Analytical-processes; Laboratory-testing; Nanotechnology; Particle-aerodynamics; Particulate-dust; Particulates; Personal-protection; Personal-protective-equipment; Protective-equipment; Protective-measures; Risk-analysis; Statistical-analysis; Author Keywords: Nanoparticle Penetration; Nonwoven Fabric; Protective Clothing
• ISSN:
  1545-9624
• Document Type:
  Text
• Genre:
  Journal Article
• Place as Subject:
  North Carolina ; OSHA Region 3 ; OSHA Region 4 ; Pennsylvania
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  NPPTL - National Personal Protective Technology Laboratory
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  2 pdf pages
• Volume:
  8
• NIOSHTIC Number:
  nn:20038033
• Citation:
  J Occup Environ Hyg 2011 Jan; 8(1):13-22
• Contact Point Address:
  Pengfei Gao, National Institute for Occupational Safety and Health, National Personal Protective Technology Laboratory (NPPTL), 626 Cochrans Mill Road, Pittsburgh, PA 15236
• Email:
  PGao@cdc.gov
• Federal Fiscal Year:
  2011
• Peer Reviewed:
  True
• Source Full Name:
  Journal of Occupational and Environmental Hygiene
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:b6f940d48034c9719ef87e3a7fc5dcb40cce2fa94fa03e6e37571f9777c456ced4b99332539985322ea858396fb117bf7f86472af168ad111e221cde2d504aa3
• Download URL:
  https://stacks.cdc.gov/view/cdc/231559/cdc_231559_DS1.pdf
• File Type:
  [PDF - 87.90 KB ]