GB/T 15331-2020 Translated English of Chinese Standard. (GBT 15331-2020, GB/T15331-2020, GBT15331-2020): Test method for water vapor transmission rate of pressure-sensitive tapes
https://www.chinesestandard.net, 8 feb. 2021 - 15 pagini
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.
according to formula Adhesive Products adhesive surface aluminum or stainless anhydrous calcium chloride auxiliary bonding box with anhydrous clean the bonding contact the tape Edge sealing material Edition Electronic balance GB/T Glue the specimen grams g grams per square i+1th instruments and equipment mass change mass increase meter day g/(m2·d method for section method for vertical method for water non-moisture-absorbing material piece reaches equilibrium Preparation of test pressure-sensitive tape rate is zero rate of pressure-sensitive rate see Clause relative change rate relative humidity requirements in instruments Result calculation ring test cover Round test cover section water vapor shown as Figure square meter day stainless steel standard environment standard test environment steel is recommended tape is pasted temperature of 38±1)°C terms and definitions test method test piece reaches Test steps total weight transmission rate WVTRcross-section unit time NOTE vapor transmission rate vertical water vapor water vapor transmission WVTRvertical zero aluminum Zhongshan