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ISO 7231:2023

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

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Kehtiv alates 15.08.2023
Tegevusala (ICS grupid)
83.100 Vahtplastid
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Standardi ajalugu

Staatus
Kuupäev
Tüüp
Nimetus
15.08.2023
Põhitekst
15.06.2010
Põhitekst
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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