ASTM F2228-13(R2021) pdf free download

ASTM F2228-13(R2021) pdf free download.Standard Test Method for Non-Destructive Detection of Leaks in Packaging Which Incorporates Porous Barrier Material by CO 2 Tracer Gas Method
1. Scope
1.1 This non-destructive test method detects leaks in non- porous rigid thermoformed trays, as well as the seal between the porous lid and the tray. The test method detects channel leaks in packages as small as 100 µm (0.004 in.) diameter in the seal as well as 50 µm (0.002 in.) diameter pinholes, or equivalently sized cracks in the tray, subject to trace gas concentration in the package, package design and manufactur- ing tolerances. N OTE 1—This test method does not claim to challenge the porous (breathable) lidding material. Any defects that may exist in the porous portion of the package will not be detected by this test method. 1.2 The values stated in SI units are to be regarded as standard. The values given in parentheses after SI units are provided for information only and are not considered standard. 1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appro- priate safety, health, and environmental practices and deter- mine the applicability ofregulatory limitations prior to use. 1.4 This international standard was developed in accor- dance with internationally recognized principles on standard- ization established in the Decision on Principles for the Development of International Standards, Guides and Recom- mendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
8. Reagents and Materials
8.1 CO 2 Trace Gas Cylinder and Regulator—A cylinder of “Commercial” or “Bone Dry” grade carbon dioxide with a minimum of 206.84 kPa (30 psi) pressure is required for calibration and testing. 8.2 Sealing Membrane—The temporary sealing membrane must exhibit the correct pliability and tackiness in order to form a gas-tight bond with the porous lidding materials during the testing process, and must release at the end of the test without damaging the porous lid or the edge seal. 8.3 Sealing Membrane-induced Damage—During the pro- cess of membrane selection for a specific package design and configuration, inspect the packages for the following indica- tions of membrane-induced damage after the membrane is removed from the package: 8.3.1 Sticky residue remaining on the porous barrier mate- rial at the end of the test cycle. 8.3.2 Fibers from the porous barrier material remaining on the sealing membrane at the end of the test cycle. 8.3.3 Visible changes to the texture or structure of the porous lidding material at the end of the test cycle, under microscope or other magnified examination. 8.3.4 Damage to the printed information on the porous barrier. The adhesive of the sealing membrane may lift off the ink from the barrier. 8.3.5 Failure of the package to release from the sealing membrane at the end of the test cycle. 8.3.6 Damage to the seal incurred on removal of the membrane from the package.
10. Calibration and Standardization
10.1 Before any measurements are made, the apparatus must be calibrated. The calibration procedure is used for overall system checkout, as well as to establish an initial reference profile for a simulated channel or pinhole leak, and to determine test limits for each different package geometry that is to be tested using a specific test fixture. The calibration procedure is performed to establish the sensitivity setting ofthe instrumentation. It is expected that the calibration procedures are carried out frequently; typically, at least one or more times a day, preferably at the beginning of every shift. 10.2 Refer to the instrument manufacturer’s operating in- structions regarding preparation ofCalibration Standards, Con- ditioning of Calibration Packages and Instrument Calibration used in establishing baseline settings.