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.
| SDO | ISO: International Organization for Standardization |
| Document Number | ISO 7231 |
| Publication Date | Not Available |
| Language | en - English |
| Page Count | |
| Revision Level | |
| Supercedes | |
| Committee | ISO/TC 45/SC 4 |