| Popis: |
One hundred microliters of solvent was applied to protective clothing materials to estimate the extent of permeation when a garment is splashed with a liquid. Various thicknesses of butyl rubber, natural rubber, neoprene, neoprene plus natural rubber, nitrile, and polyvinyl chloride were exposed to benzene or carbon tetrachloride at ambient temperature. Permeating solvent was trapped in 5°C n -octane and its concentration was measured continually. Breakthrough time was defined as the time at which 0.1% of the applied solvent permeated. From the data obtained, two conclusions were drawn: permeation of a small quantity of liquid (a 100-μl “splash”) more closely resembles permeation of liquid than permeation of low vapor concentrations in continuous contact with a garment, and a garment thickness can be defined which is sufficient to provide a known degree of protection for a particular solvent. |
