标准编号：ISO 7231:2023
中文名称：高聚物多孔弹性材料 恒定压力降时气流值的测定
英文名称：Polymeric materials, cellular, flexible — Determination of air flow value at constant pressure-drop
发布日期：2023-08
标准范围
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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