ISO 4638:1984
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Polymeric materials, cellular flexible — Determination of air flow permeability
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English, French
01-05-1984
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.
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