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    GB/T 15331-2020
    Test method for water vapor transmission rate of pressure-sensitive tapes

    GB/T 15331-2020 specifies test methods for determining the water vapor transmission rate of pressure-sensitive adhesive tapes, including both vertical and cross-section testing methods. The vertical water vapor transmission rate test is applicable to single-sided or double-sided pressure-sensitive adhesive tapes, while the cross-section test is only applicable to double-sided pressure-sensitive adhesive tapes. The standard defines the test principles, specimen preparation, procedures, and result calculation requirements. The core equipment includes test chambers, test boxes, balances with a division value of 1 mg, weights, and other instruments, combined with desiccants such as anhydrous calcium chloride and sealing materials. Under conditions of 38°C and 90%-95% relative humidity, the mass change of the specimen is measured using the gravimetric method to characterize the water vapor transmission performance of the adhesive tape in different directions.

    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 G38 ICS 83.180
    Release Date 2020-11-19 00:00:00 Implementation Date 2021-10-01 00:00:00

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