AbstractThe permeability of water vapor in a composite film a Mylar (trademark of DuPont, Inc.) film coated with a pressure sensitive adhesive on both sides and a Mylar film (type D) have been determined at 23°C. The water vapor permeability in the pressure sensitive adhesive, Flexbond 150 (a trademark of Air Products and Chemicals), and the Mylar film have been found to be 3.23 × 10−7and 2.30 × 10−8cm3(STP) cm · cm−2· s−1· (cm Hg)−1, respec
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