prEN ISO 4638

Polymeric materials, cellular flexible - Determination of air flow permeability (ISO/FDIS 4638:2026)

General information

Current stage: 40.20 DIS ballot initiated: 12 weeks Aug 6, 2026

Originator: CEN

Owner: CEN/TC 249 Plastics

Type: European Norm

ICS: 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
EN ISO 4638:1995

NOW

IN_DEVELOPMENT
prEN ISO 4638
40.20 DIS ballot initiated: 12 weeks
Aug 6, 2026