The air permeability test method is based on the Kozeny equation. Weighed fibres (test specimen) are introduced in a measuring chamber with known volume. Air is passed through this test specimen. A scale indicating variations in permeability of air may be calibrated in appropriate absolute units of rate of flow or pressure difference and a table or graph is provided for conversion of the observed reading into values of mean diameter of the measured wool fibres.
Status: WithdrawnPublication date: 1976-11
Edition: 1Number of pages: 8
Technical Committee: ISO/TC 38/SC 23 Fibres and yarns
- ICS :
- 59.060.10 Natural fibres
ISO 1136:1976Stage: 95.99
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