THE ROLE OF THE MOISTURE/VAPOUR BARRIER IN THE RETENTION OF METABOLIC HEAT DURING FIRE FIGHTING

Authors
  1. Frim, J.
  2. Romet, T.T.
Corporate Authors
Defence and Civil Inst of Environmental Medicine, Downsview ONT (CAN)
Abstract
The relationship between metabolic heat build-up and the vapour permeability of the barrier layer in fire fighter turnout clothing was examined under a variety of conditions. The clothing elements examined included three outer shells, five moisture/vapour barrier configurations, and two thermal liners. The results showed that the moisture/vapour barrier material/configuration was the dominant factor in determining thermal physiological strain, with the shell and liner playing minor roles. It is concluded that a full vapour barrier of a material such as neoprene leads to significantly higher thermal physiological strain than a vapour permeable water barrier of a material such as Gore-tex (TRADEMARK). Partial coverage barriers of either material provide even greater reduction in strain, and omission of the barrier entirely is best from a physiological perspective.
Report Number
DCIEM-88-RR-40 — Research Report
Date of publication
15 Oct 1988
Number of Pages
84
DSTKIM No
89-00831
CANDIS No
58769
Format(s):
Hardcopy;Originator's fiche received by DSIS

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