Encyclopedic Dictionary of Polymers

2011 Edition
| Editors: Jan W. Gooch

Water Vapor Transmission (WVT, WVTR)

  • Jan W. Gooch
Reference work entry
DOI: https://doi.org/10.1007/978-1-4419-6247-8_12722

The rate of water vapor flow, under steady specified conditions, through a unit area of a material, between its two parallel surfaces and normal to the surfaces. Metric unit of measurements is 1 g/24 h·m2. See  PERM. (Paint and Coating Testing Manual (Gardner-Sward Handbook) MNL 17, 14th Ed., ASTM, Conshohocken, PA, (1995); www.astm.org)

Copyright information

© Springer Science+Business Media, LLC 2011

Authors and Affiliations

  • Jan W. Gooch
    • 1
  1. 1.AtlantaUSA