The ASTM F1140/F1140M standard, titled "Standard Test Methods for Internal Pressurization Failure Resistance of Unrestrained Packages," is a standard used in the packaging industry to evaluate the ability of a package to withstand pressure differentials that may occur during processes such as sterilization and transportation. This standard provides methods for assessing the failure tendencies of packages under these conditions.
The standard consists of two main test methods: the burst test and the creep test. The burst test involves increasing the internal pressure of a package until it fails or ruptures, simulating a sudden and extreme pressure differential that could occur during manufacturing or transportation. The test allows manufacturers to determine the maximum pressure that their package can withstand before failure.
On the other hand, the creep test involves maintaining a specific pressure inside the package for a defined time period or until the package fails. This test aims to simulate the effects of prolonged pressure differentials that may occur during lengthy transportation processes or during storage.
It is important to note that this standard specifies that any correlations made between different test equipment must consider all parameters of the testing process. These parameters include factors such as package size, material, seal configuration, test equipment, air flow rate into the package, sensitivity, and the position of the test article.
While the ASTM F1140/F1140M standard provides a quick and effective means to evaluate package performance under pressure differentials, it is important to note that these test methods do not necessarily correlate with the actual seal strength of the package, as typically measured using ASTM F88 or equivalent methods like EN 868-5 Annex D.