Penetration of liquid through small holes in mylar film using a standard test method.
Hewett-DJ; Berardinelli-SP; Wassell-JT; Hall-RC; Noonan-GP
Morgantown, WV: U.S. Department of Health and Human Services, Public Health Service, Centers for Disease Control and Prevention, National Institute for Occupational Safety and Health, 1995 Jan; :1-43
The ASTM Standard Test Method for Resistance of Protective Clothing Materials to Penetration by Liquids was evaluated against barrier material holes measured by electron microscopy in the 4 to 232 micrometer range, using liquids with surface tensions of 19.4, 29.9, 45.3, and 73.4 dynes/centimeter, and gauge pressures of 0.0 pascal (Pa), 6.9 kilopascal (kPa), and 14.0kPa. The barrier material was Mylar polyester film. The hole diameters at which penetration was observed at 0.0Pa depended on the challenge liquid surface tension and the percent relative humidity of the ambient air surrounding the penetration test cell. Comparable penetrations were noted for the 6.9kPa and 14.0kPa added pressure tests throughout the hole diameter range and liquid surface tensions tested in the study. The results supported the decision in 1987 to lower the added pressure testing level of the 1984 edition of the ASTM Penetration Test Method from 14.0kPa to the 6.9kPa maximum pressure level in the 1987 edition, and the option to use the 6.9kPa pressure level to prevent ballooning of extensible materials.
NIOSH-Author; Materials-testing; Protective-clothing; Personal-protective-equipment; Skin-protection; Physical-properties
NTIS Accession No.
Control Technology and Personal Protective Equipment
Penetration of liquid through small holes in mylar film using a standard test method