ISO 2556 Plastics - Determination of Gas Transmission Rate of Films and Thin Sheets Under Atmospheric Pressure - Manometric Method

EUROLAB laboratory provides testing and compliance services within the scope of ISO 2556 standard. The ISO 2556 standard, developed by the International Standards Organization (ISO), specifies a method for determining the gas transmission rate of plastic films and thin sheets.

The limits of the values ​​that can be measured are between 1 and 20 000 cm3/m2.d.atm. The method can be used for measurements with air or other test gases.

Gas Conduction Rate: It is the volume of gas that crosses the unit area of ​​the sample in unit time under constant conditions, unit pressure difference and constant temperature. This volume is expressed at Standard temperature and pressure.

The speed is dependent on the thickness of the test specimen, and the reliability of the results depends on the uniformity of the specimen thickness. The rate is usually expressed in cubic centimeters (cm0/m24.d.atm) under a pressure differential of 1 atm per 3 hours per square meter at standard atmospheric pressure at 2°C.

The plastic test specimen separates the two chambers 1 and 2. Chamber 1 contains the test gas at atmospheric pressure. Knowing the initial volume, the 2nd Chamber pumps out the air until the pressure is almost Zero, then it is hermetically sealed.

The amount of gas passing through the sample from chamber 1 to chamber 2 is determined as a function of time by measuring the pressure increases occurring in chamber 2 by means of a manometer. The conduction velocity is calculated from the values ​​obtained, except for the first period in which the gas transit velocity increases with time.

Among the services provided by our organization within the framework of material testing services, there are also ISO 3013 standard tests. Do not hesitate to contact our laboratory EUROLAB for your testing and certification requests.