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Effect of Salt Spray on the Rate of Water Vapor Transmission in Microporous Fabrics

Two microporous fabrics, one formed by lamination and the second by coating, along with a nylon woven fabric, were subjected to a simulated sea spray environment. The water vapor transmission rates of the treated fabrics and of treated controls were determined using the desiccant method. As expected, in all cases, the rate of moisture vapor transmission for the treated samples was significantly lower than that for the untreated. The majority of the blockage was inherent in the base fabric, with smaller amounts attributable to the microporous substrates.