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BS ISO 9932:2021

$102.76

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

Published By Publication Date Number of Pages
BSI 2021 20
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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 38 mm thick and with water vapour transmission rates in the range from 0,05 g/(m2·d) to 65 g/(m2·d) can be tested. The basis of the function of the instrumental techniques is briefly described. Advice on calibration is given in Annex B.

PDF Catalog

PDF Pages PDF Title
2 National foreword
6 Foreword
7 Introduction
9 1 Scope
2 Normative references
3 Terms and definitions
4 Method A: Dynamic sweep gas method
4.1 Principle
10 4.2 Apparatus
11 5 Method B: Static gas method
5.1 Principle
5.2 Apparatus
12 6 Sampling
13 7 Preparation of test pieces
8 Procedure
8.1 Method A
8.2 Method B
8.3 Barrier material having one face of uncoated paper
14 8.4 Creased material
9 Expression of results
10 Precision
10.1 General statement of the precision
10.2 Method A
10.3 Method B
11 Test report
15 Annex A (normative) Saturated saline solutions
16 Annex B (normative) Calibration
17 Annex C (informative) Comparison of dynamic method with gravimetric method
18 Bibliography
BS ISO 9932:2021
$102.76