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See Chinese contents: GB/T 15331-2020 GB/T 15331-2020: Test method for water vapor transmission rate of pressure-sensitive tapes
This Standard specifies test principle, instruments and equipment, preparation of test piece, test steps and result calculation for water vapor transmission rate of pressure-sensitive tapes. This Standard includes test methods for vertical water vapor transmission rate and section water vapor transmission rate. The test method for vertical water vapor transmission rate is applicable to single-sided or double-sided pressure sensitive tape. The test method for section water vapor transmission rate is applicable to double-sided pressure-sensitive tape.
