Life Science Outsourcing offers ASTM-D3078 testing services. ASTM-D3078 is a standard test method used to determine if flexible packaging has leaks by testing for bubble emission.
The ASTM-D3078 is the standard test method for determining gross leaks in flexible packaging containing a headspace gas and uses a bubble emission test to identify the leak. The test is conducted by submerging a test specimen in immersion fluid within the confines of a vacuum chamber. If bubbles or seepage of fluid occur within the specimen, then a leak is present – and the specimen will fail the test.
ASTM-D3078 testing apparatus and materials
ASTM-D3078 utilizes a vacuum chamber and immersion fluid for testing.
What is a vacuum chamber?
A vacuum chamber is any transparent container capable of withstanding approximately one atmosphere pressure differential, fitted with a vacuum-tight cover. A vacuum gauge, an inlet tube from a source of vacuum, and an outlet tube to the atmosphere are connected to the chamber cover.
Immersion fluid requirements
Immersion fluid should not degrade the package being tested. The test sample and test fluid must be at equilibrium with normal room temperature.
ASTM-D3078 testing scope
1.1 – This test method covers the determination of gross leaks in flexible packaging containing a headspace gas. Test sensitivity is limited to 1 × 10−5 atm cm3/s (1 × 10−6 Pa m3/s) or even less sensitive as indicated in a recent interlaboratory test (reported in Section 12).
1.2 – Small leaks may not be detected by this procedure. Viscoelastic effects on the products, or entrapped air, become significant and prevent passage through small openings. Positive pressure inside the pouch after the vacuum is drawn may force the product to plug small leaks. The size of the leak that can be detected is dependent upon the products contained, the nature of the packaging material, and the test parameters selected.
1.3 – The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.
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