The ASTM D1434 test covers the estimation of the steady-state transmission rate of a gas through plastics in the form of film, coating, laminate, and plastic-coated papers or fabrics. This test method allows determination of gas transmission rate (GTR), permeability and, in the case of homogeneous materials, permeability.
These measurements give translucent estimates for gas transmission of single pure gases through film and coating. Correlation of measured values with any use, such as packaged content protection, should be determined by experience. The tests are run using gas with 0% humidity changes.
Gas transmission rate is affected by conditions not specifically provided in these tests, such as moisture content, plasticizer content, and nonhomogeneities. These tests do not include any provision for testing gaskets that may be included in packaging applications.
Detailing tests revealed that the permeabilities measured by these procedures showed a strong dependence on the procedure used and the laboratory performing the test. Agreement with other methods is sometimes weak and can be financially dependent.
The materials tested often affect inter-laboratory precision. The reasons for these variations are currently unknown. It is recommended that this method not be used for arbitration unless the buyer and seller both determine that they are measuring the same amount to a mutually agreed sensitivity level.
ASTM D1434 covers two test procedures:
Values stated in SI units should be accepted as standard. No other units of measurement are included in this standard.
This standard is not meant to address all safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to determine appropriate safety and health practices prior to use and to determine the applicability of regulatory restrictions.
Our organization also provides testing services to businesses within the scope of ASTM D1434 Standard Test Method for Determining Gas Permeability Properties of Plastic Film and Sheeting, within the framework of laboratory testing services.
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