Standard Test Method for Water Vapor Transmission Rate of Sheet Materials Using Dynamic Relative Humidity Measurement

Importancia y uso:

5.1 No single set of test conditions can represent all climatic and use conditions, so this WVTR test method serves more to compare different materials at a stated set of conditions than to predict their actual performance in the field under any conditions.

5.2 The water vapor transmission rate, under known and carefully controlled conditions, may be used to evaluate the vapor barrier qualities of a sheet. Direct correlation of values obtained under different conditions of test temperature and relative humidity will be valid provided the barrier material under test does not undergo changes in solid state (such as a crystalline transition or melting point) at or between the conditions of test.

Subcomité:

F02.10

Referida por:

F2097-23, F2902-24, F2097-23, E3069-19A, E3127-24

Volúmen:

15.10

Número ICS:

55.040 (Packaging materials and accessories)

Palabras clave:

dynamic measurement; flexible barrier materials; relative humidity; sheet material; water vapor transmission;