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Particle release from respirators, part II: determination of the effect of tension applied in simulation of removal.

Authors
Birkner-JS; Kovalchik-S; Fung-D; Hinds-WC; Kennedy-NJ
Source
J Occup Environ Hyg 2011 Jan; 8(1):10-12
NIOSHTIC No.
20038146
Abstract
This study evaluated the potential for disposable filtering facepiece respirators (hereafter termed masks) contaminated with 1- m particles to release particles as a result of lateral tension applied to the mask. The lateral tension was designed to simulate the removal of a contaminated mask from a user's head. Four brands of filtering facepieces were loaded with approximately 20 million 1.0- m polystyrene latex (PSL) microspheres. The respirators were then placed in a test chamber and subjected to lateral tension between 17.8-26.7 N (4-6 lbs) for 1 to 2 sec. The findings suggest that neither mask type nor loading condition affects particle release. This supports our hypothesis that when filtering facepiece respirators are properly removed from the head they will not release a significant number of particles.
Keywords
Airborne-particles; Exposure-assessment; Face-masks; Filter-materials; Filters; Laboratory-testing; Microscopic-analysis; Particle-aerodynamics; Particulate-dust; Particulates; Personal-protective-equipment; Protective-equipment; Respirators; Respiratory-equipment; Risk-analysis; Risk-factors; Statistical-analysis; Work-analysis; Worker-motivation; Work-practices; Author Keywords: particles; release; removal; respirator; stretch
Contact
Jeffrey S. Birkner, UCLA, Environmental Health Sciences, 56-070 CHS, Box 951772, Los Angeles, CA 90095
CODEN
JOEHA2
Publication Date
20110101
Document Type
Journal Article
Email Address
jeffbirkner@sbcglobal.net
Funding Type
Grant
Fiscal Year
2011
NTIS Accession No.
NTIS Price
Identifying No.
Grant-Number-T42-OH-008412
Issue of Publication
1
ISSN
1545-9624
Source Name
Journal of Occupational and Environmental Hygiene
State
CA
Performing Organization
University of California Los Angeles
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