Paper and board. Determination of water vapour transmission rate of sheet materials. Dynamic sweep and static gas methods

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Hardcopy , PDF

Language(s)

English

Published date

03-03-2021

Publisher

British Standards Institution

Committee	PAI/11
DocumentType	Standard
Pages	20
PublisherName	British Standards Institution
Status	Current
Supersedes	BS 7406:1991

This document describes general test methods for determining the water vapour transmission rate of sheet materials by means of a dynamic gas method or a static gas method. Depending on the method and specific apparatus employed, materials up to 38mm thick and with water vapour transmission rates in the range from 0,05g/(m2·d) to 65g/(m2·d) can be tested. The basis of the function of the instrumental techniques is briefly described. Advice on calibration is given in AnnexB.

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BS ISO 9932:2021

Paper and board. Determination of water vapour transmission rate of sheet materials. Dynamic sweep and static gas methods

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