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Homepage>BS EN ISO 7231:2023 Polymeric materials, cellular, flexible. Determination of air flow value at constant pressure-drop
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sklademVydáno: 2023-08-24
BS EN ISO 7231:2023 Polymeric materials, cellular, flexible. Determination of air flow value at constant pressure-drop

BS EN ISO 7231:2023

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

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Označení normy:BS EN ISO 7231:2023
Počet stran:22
Vydáno:2023-08-24
ISBN:978 0 539 17080 1
Status:Standard
DESCRIPTION

BS EN ISO 7231:2023


This standard BS EN ISO 7231:2023 Polymeric materials, cellular, flexible. Determination of air flow value at constant pressure-drop is classified in these ICS categories:
  • 83.100 Cellular materials
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.