EN ISO 2556:2000

Plastics - Determination of the gas transmission rate of films and thin sheets under atmospheric pressure - Manometric method (ISO 2556:1974)

Specification of the methodand of two types of suitable test apparatus. The plastic test specimen separates two chambers, the one contains the test gas at atmospheric pressure, the other of known initial volume has the air pumped out until the pressure is practically zero. The quantity of gas which passes through the specimen from one chamber to the other is determined as a function of time by measuring the increase in pressure occuring in the second chamber by means of a manometer.

Kunststoffe - Bestimmung der Gasdurchlässigkeit von Folien und dünnen Tafeln unter atmosphärischem Druck -Druckmessgerät- Verfahren (ISO 2556:1974)

Diese internationale Norm legt ein Verfahren zur Bestimmung der Gasdurchlässigkeit von Folien und dünnen Tafeln aus Kunststoff fest. Der Werte-Bereich, in dem gemessen werden kann, erstreckt sich von 1 bis 20.000 cm3/m2.d.atm. Das Verfahren ist geeignet für Messungen entweder mit Luft oder mit anderen Testgasen.

Matières plastiques - Détermination du coefficient de transmission d'un gaz par les feuilles et plaques minces, sous pression atmosphérique - Méthode manométrique (ISO 2556:1974)

La présente Norme Internationale spécifie une méthode pour la détermination du coefficient de transmission d'un gaz par les feuilles et plaques minces en matière plastique. Les valeurs limites mesurables sont de 1 et 20 000 CM3/M2.d.atrn. La méthode est applicable dans les cas de mesurages faits soit avec de l'air, soit avec d'autres gaz d'essai.

Polimerni materiali - Filmi in folije - Ugotavljanje prepustnosti plinov pri atmosferskem tlaku - Manometrijska metoda (ISO 2556:1974)

General Information

• Status: Published
• Publication Date: 19-Sep-2000
• Withdrawal Date: 30-Mar-2001
• ICS: 83.140 - Rubber and plastics products
• Technical Committee: CEN/TC 249 - Plastics
• Drafting Committee: CEN/TC 249 - Plastics
• Current Stage: 6060 - Definitive text made available (DAV) - Publishing
• Start Date: 20-Sep-2000
• Completion Date: 20-Sep-2000
• Ref Project: SIST EN ISO 2556:2001 - Plastics - Determination of the gas transmission rate of films and thin sheets under atmospheric pressure - Manometric method (ISO 2556:1974)

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Polimerni materiali - Filmi in folije - Ugotavljanje prepustnosti plinov pri atmosferskem tlaku - Manometrijska metoda (ISO 2556:1974)Kunststoffe - Bestimmung der Gasdurchlässigkeit von Folien und dünnen Tafeln unter atmosphärischem Druck -Druckmessgerät- Verfahren (ISO 2556:1974)Matieres plastiques - Détermination du coefficient de transmission d'un gaz par les feuilles et plaques minces, sous pression atmosphérique - Méthode manométrique (ISO 2556:1974)Plastics - Determination of the gas transmission rate of films and thin sheets under atmospheric pressure - Manometric method (ISO 2556:1974)83.140.10Filmi in folijeFilms and sheetsICS:Ta slovenski standard je istoveten z:EN ISO 2556:2000SIST EN ISO 2556:2001en01-junij-2001SIST EN ISO 2556:2001SLOVENSKI
STANDARD



SIST EN ISO 2556:2001



SIST EN ISO 2556:2001



SIST EN ISO 2556:2001



INTERNATIONAL STANDARD. INTERNATIONAL ORGANIZATION FOR STANDARDIZATION l MEXAYHAPOAHAII OPTAHM3ALWI l-IO CTAHAAPTI13AL@iW-ORGANISATION INTERNATIONALE DE NORMALISATION Plastics - Determination of the gas transmission rate of films and thin sheets under atmospheric pressure - Manometric method Ma tieres plastiques - Determination du coefficient de transmission d’un gaz par fes feuilles et plaques minces, sous Pression a tmospherique - Mthode manometrique First edition - 1974-06-01 UDC 678.5/.8-416 : 620.165.29 Descriptors : plastics, sheets, thin films, diffusion, gas, determination, pressure test. Rd. No. ISO 2556-1974 (E) Price based on 6 pages SIST EN ISO 2556:2001



FOREWORD ISO (the international Organization for Standardization) is a worldwide federation of national Standards institutes (ISO Member Bodies). The work of developing International Standards is carried out through ISO Technical Committees. Every Member Body interested in a subject for which a Technical Committee has been set up has the right to be represented on that Committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. Draft International Standards adopted by the Technical Committees are circulated to the Member Bodies for approval before their acceptance as International Standards by the ISO Council. International Standard ISO 2556 was drawn up by Technical Committee ISO/TC 61, Plastics, and circulated to the Member Bodies in February 1972. lt has been approved by the Member Bodies of the following countries : Australia Austria Belgium Brazil Canada Czechoslovakia Egypt, Arab Rep. of France Germany The Member Body o on technical grounds f the following country expr India I reland Israel Japan New Zealand Poland Portugal Romania South Africa, Rep. of Netherlands Spain Sweden Switzerland Thailand Turkey United Kingdom U.S.A. U.S.S.R. disapproval of the document 0 International Organkation for Standardkation, 1974 l Printed in Switzerland SIST EN ISO 2556:2001



INTERNATIONAL STANDARD ISO 2556-1974 (E) Plastics - Determination of the gas transmission rate of films and thin sheets under atmospheric pressure - Manometric method 1 SCOPE AND FIELD OF APPLICATION This International Standard specifies a method for the determination of the gas transmission rate of plastics films and thin sheets. The limits of the values which tan be measured are from 1 to 20 000 cm3/m2.d.atm. The method tan be used for measurements made either with air or with other test gases. 2 REFERENCE ISO/ R 29 1, Plastics - Standard a tmospheres for conditioning and testing. 3 DEFINITION gas transmission rate : The volume of gas which, under steady conditions, crosses unit area of the Sample in unit time under unit pressure differente and at constant temperature. This volume is expressed at Standard temperature and pressure. The rate depends on the thickness of the test specimen, and the reliability of the results depends on the evenness of the specimen thickness. The rate is usually expressed in cubic centimetres (at 0 “C under Standard atmospheric pressure per Square metre per 24 h under a pressure differente of 1 atm (cm3/m2.d.atm). NOTES 1 The SI unit of gas transmission rate is fm/Pa.s [ 1 fm (femtometre) = 10 -=15 m] 1 cm3/m2.d.atm = 0,114 3 fm/Pa.s and 1 fm/Pa.s = 8,752 cm3/m2.d.atm. 2 The Standard atmospheric pressure corresponds to the pressure of a mercury column 760 mm high : either 1 013 mbar or 101,3 kPa. 4 PRINCIPLE The plastic test specimen separates two chambers num- bered 1 and 2. Chamber 1 contains the test gas at atmos- pheric pressure. Chamber 2, of know initial volume, has the air pumped out until the pressure is practically Zero, then is hermetically sealed. The quantity of gas which Passes through the specimen from chamber 1 to chamber 2 is determined as a function of time by measuring the increases of pressure occurring in chamber 2 by means of a manometer. The transmission rate is calculated from the values obtained, excluding the initial per
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