Military Food Pack Flex Test – ASTM F392 and Gelbo Method
Introduction to Military Food Pack Flex Testing When it comes to operational reliability in extreme environments, the military food pack must remain intact through transportation, handling, and storage. To verify the durability of flexible barrier materials used in these packages, the flex test—commonly known as the Gelbo test—is essential. This testing method evaluates a material’s resistance to pinholing and delamination under repeated stress, ensuring the food remains protected and uncontaminated. Flex Test, Gelbo Test, and the Role of Flex Durability Tester The flex test, as described in ASTM F392, simulates the real-world mechanical fatigue that flexible packaging materials experience. During this process, the test specimen is subjected to a twisting […]
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