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About This Item
Full Description
— method B, for all types of flexible cellular polymeric material, but especially for materials with a low permeability to air. For method B, two methods are specified in this document:
— method B1: with manual measurement;
— method B2: with automatic measurement. NOTE 1 Air flow values can be used to give an indication of the effects of formulation and production variables on the cellular structure. NOTE 2 In this document, the expression “conventional type of flexible cellular polymeric material” means types which are unsuitable for sealing purposes.
Document History
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ISO 7231:2023
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Polymeric materials, cellular, flexible - Determination of air flow value at constant pressure-drop- Most Recent
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ISO 7231:2010
Polymeric materials, cellular, flexible - Determination of air flow value at constant pressure-drop- Historical Version
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ISO 7231:1984
Polymeric materials, cellular flexible - Method of assessment of air flow value at constant pressure-drop- Historical Version