The GB/T 22921-2008 standard specifies methods for the determination of water vapor transmission of paper and Cardboard sheet materials, including dynamic gas flow method and static gas method. These methods are used to evaluate the gas transmission performance of materials under different conditions to determine their suitability for Encasement and protection applications.
This summary is not the original standard text and is for reference only. For accurate information, please obtain it through official channels.
| Status | Active | ||
|---|---|---|---|
| CCS | Y30 | ICS | 85.010 |
| Release Date | 2008-12-30 00:00:00 | Implementation Date | 2009-09-01 00:00:00 |