Steam permeability test - has steam feed to one side of sample and measurement of electrical resistance at adsorption on other side gives permeability measure

摘要

To test the steam vapour permeability of water impermeable materials, such as for protective garments or roofing or tenting materials and leathers, steam is passed to one side of the sample (2). At the same time, the electrical resistance is measured at the steam adsorption (10) on the other side of the sample. The timed change in the electrical resistance is taken as the measure of the steam permeability in the sample. ADVANTAGE - The test method is simple, and requires short sampling times.