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ISO 7231:2023

Polymeric materials, cellular, flexible — Determination of air flow value at constant pressure-drop

Publication date:   Aug 15, 2023

General information

60.60 Standard published   Aug 15, 2023

ISO

ISO/TC 45/SC 4 Products (other than hoses)

International Standard

83.100   Cellular materials

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Scope

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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ISO 7231:2010

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ISO 7231:2023
60.60 Standard published
Aug 15, 2023