ISO-7231 › Polymeric materials, cellular, flexible - Determination of air flow value at constant pressure-drop
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This document specifies two methods for determining the air flow value of flexible cellular polymeric materials:
. method A, for conventional types of flexible cellular polymeric material;
. 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.
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Document Number
ISO 7231:2023
Revision Level
3RD EDITION
Status
Current
Publication Date
Aug. 1, 2023
Committee Number
ISO/TC 45/SC 4