Leakage Test of the Worn Respirators by Sodium-Chloride Particles

DOI
  • IKEZAWA Yoshio
    Div. of Health Physics and Safety, Japan Atomic Energy Research Institute
  • MURATA Mikio
    Div. of Health Physics and Safety, Japan Atomic Energy Research Institute
  • YOSIDA Yoshikazu
    Div. of Health Physics and Safety, Japan Atomic Energy Research Institute

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Other Title
  • 塩化ナトリウム粒子による防護マスク着用時の漏えい試験

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The performance of a respirator is governed mostly by the leakage through between mask and face. The leakage has been measured for three types of half mask and two types of full-face mask, worn by about forty persons, in order to examine the usefullness in actual application of the test method using NaCl particles. The particles generated with a nebulizer were fed into the hood in which the subject wore his respirator, and the concentration of NaCl in exhaled air was measured by a flame photometer. The measured values were corrected for the deposition of NaCl particles in the respiratory tract.<br>The leakage of full-face masks differed largely with experience of the wearer. However, a few of persons tested could not be adjusted so as to avoid serious leakage.<br>The problems in application of the present method to field test are also discussed.

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