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ISO/FDIS 4638

Polymeric materials, cellular flexible — Determination of air flow permeability ISO/FDIS 4638

General information

50.20   Proof sent to secretariat or FDIS ballot initiated: 8 weeks   Aug 7, 2026

ISO

ISO/TC 45/SC 4 Products (other than hoses)

International Standard

83.100   Cellular materials

Scope

Applicable to test pieces cut from products of cellular materials. Useful for two purposes: a) studying the structure of cellular products in connection with their physical properties and their method of manufacture and b) ensuring product quality (quality assurance). Describes principle, apparatus, test piece and conditions, procedure and calculation and expression of the results. Three figures deliver the details for testing.

Life cycle

PREVIOUSLY

PUBLISHED
ISO 4638:1984

NOW

IN_DEVELOPMENT
ISO/FDIS 4638
50.20 Proof sent to secretariat or FDIS ballot initiated: 8 weeks
Aug 7, 2026




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