Effects of Hoods and Flame-Retardant Fabrics on WBGT Clothing Adjustment Factors

Details

• Personal Author:
  Ashley CD ; Bernard, Thomas E.
• Description:
  Personal protective clothing (PPC) may include hoods and flame-retardant (FR) fabrics that may affect heat transfer and, thus, the critical wet bulb globe temperature (WBGT crit) to maintain thermal equilibrium. The purpose of this study was to compare the differences in WBGT crit for hooded vs. nonhooded versions of particle barrier and vapor barrier coveralls as well as for coveralls made of two flame-retardant fabrics (INDURA cotton and Nomex). Acclimated men (n = 11) and women (n = 4) walked on a treadmill in a climatic chamber at 180 W/m2 wearing four different ensembles: limited-use, particle barrier coveralls with and without a hood (Tyvek 1427), and limited-use vapor barrier coveralls with and without a hood (Tychem QC, polyethylene-coated Tyvek). Twelve of the participants wore one of two flame-retardant coveralls. All participants wore standard cotton clothing. Progressive exposure testing at 50% relative humidity (rh) was designed so that each subject established a physiological steady-state followed by a clear loss of thermal equilibrium. WBGT crit was the WBGT 5 min prior to a loss of thermal equilibrium. Hooded ensembles had a lower WBGT crit than the nonhooded ensembles. The difference suggested a clothing adjustment of 1 degrees C for hoods. There were no significant differences among the FR ensembles and cotton work cloths, and the proposed clothing adjustment for FR coveralls clothing is 0 degrees C. [Description provided by NIOSH]
• Subjects:
  Cardiovascular System Ethylenes Heat Stress Disorders Hot Temperature Humidity Men Occupational Health Oxygen Personal Protective Equipment Polymers Protective Clothing Respiratory System Safety Solvents Temperature Women

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• Keywords:
  Acclimatization Author Keywords: Heat Stress Body Protection Body Temperature Breathing Climatic Conditions Clinical Tests Clothing Coated Fabrics Coatings Cotton Fabrics Fabrics Flame Retardants Heart Rate Heat Heat Acclimatization Heat Exchange Heat Exposure Heat Stress Humans Metabolic Equilibrium Metabolic Rate Oxygen Levels Oxygen Uptake Physical Exercise Physiological Testing Protective Clothing Relative Humidity Temperature Control Temperature Effects Thermoregulation Vapors WBGT

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• ISSN:
  1545-9624
• Document Type:
  Text
• Funding:
  Grant
• Genre:
  Journal Article
• Place as Subject:
  Florida ; OSHA Region 4
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  59-62
• Volume:
  5
• Issue:
  1
• NIOSHTIC Number:
  nn:20052280
• Citation:
  J Occup Environ Hyg 2008 Jan; 5(1):59-62
• Contact Point Address:
  Candi D. Ashley, University of South Florida, College of Education, 4202 E. Fowler Ave., PED 241, Tampa, FL 33612
• Email:
  ashley@tempest.coedu.usf.edu
• CAS Registry Number:
  Ethene, homopolymer (CAS RN 9002-88-4) ; Oxygen (CAS RN 7782-44-7)
• Federal Fiscal Year:
  2008
• Performing Organization:
  University of South Florida, Tampa, Florida
• Peer Reviewed:
  True
• Start Date:
  20000930
• Source Full Name:
  Journal of Occupational and Environmental Hygiene
• End Date:
  20040929
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:46722e423404258b70af22110568a923369c6e7183ec0c527a39d16e501d38c2f2ee6a4f66816c25b39bee6d9d88d5ca7feeaade2a6dd89d209b6ffe251ee1df
• Download URL:
  https://stacks.cdc.gov/view/cdc/211833/cdc_211833_DS1.pdf
• File Type:
  [PDF - 231.31 KB ]