Water Vapor Transmission Rate (WVTR) ASTM F1249

Permeation of Flexible Barrier Materials Using a Modulated Infrared Sensor

Water Vapor Transmission Rate Scope:
Determine water vapor transmission rate of flexible barrier materials used in packaging or industrial applications. Key factors to understand material permeation include thickness of the material and environmental factors such as relative humidity and temperature.

ASTM F1249 Test Procedure:
At a selected temperature and humidity, a barrier film is sealed between a wet chamber and dry chamber. A pressure modulated sensor measures moisture transmitted through the material tested.

Typical Test Area: 50cm²

Data:
Water Vapor Transmission Rate (WVTR) g/m2 per day

**Please note that this test description is intentionally generic in nature and aimed at providing a descriptive summary to enhance test understanding. Standards can be obtained from appropriate standard authorities.