DANSK DSF/ISO/DIS 7231 PDF

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.