本文件规定了两种测定柔性多孔聚合物材料空气流量值的方法: --方法A，用于常规类型的柔性蜂窝状聚合物材料； --方法B，适用于所有类型的柔性蜂窝状聚合物材料，但特别适用于对空气渗透性低的材料。 对于方法B，本文件规定了两种方法: --方法B1:采用人工测量； --方法B2:采用自动测量。 注1气流值可用于指示配方和生产变量对细胞结构的影响。 注2:在本文件中，“传统类型的柔性多孔聚合物材料”是指不适用于密封目的的类型。

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.