Q1 Permeation Newsletter

We also outline how CO₂TR is measured – from film testing (ASTM F2476) on instruments like the PERMATRAN-C 4/30 to whole package evaluations (analogous to ASTM F1307) that capture seals, closures, and fitments. The end result is data you can trust to optimize materials, validate package integrity, and model shelf life with confidence

Want the technical details, instrument setup and example configurations? Read the full white paper below for methods, sample prep and application-specific guidance.

 

 

Testing an Unknown Sample

Setting up a permeation test for a new sample type can be challenging; especially when you don’t have prior data on the time to equilibrium or transmission rate. At MOCON test lab, where we run thousands of tests for customers worldwide, we encounter this situation often. 

To address it, our engineers developed the AutoTest function. Unlike the standard Advanced Test function, AutoTest automatically adjusts test parameters as the test progresses based on the sample’s behavior. It begins with conservative settings typically used for high transmitters, and if results indicate low transmission, it modifies the parameters to better match the sample’s range.

This makes AutoTest especially valuable for R&D labs exploring new materials. However, when testing repeat or known sample types, the Advanced Test function remains the best choice to reduce overall test time. 

You can access the AutoTest function from the Test Setup screen by selecting the arrow on the left side. For more information, contact your local MOCON representative.

 

Why Testing the Whole Bottle with Closure is Vital

When evaluating container integrity and shelf life, it’s important to test the entire packaging system – the bottle and the closure – rather than just the bottle alone. Bottle-only permeation testing is valuable for comparing barrier materials and formulations, but it doesn’t tell the full story. In real-world applications, the bottle/closure interface is often the weakest point in the system’s overall barrier performance.

Closures play a central role in protecting product quality and preventing contamination. Even a high-performing bottle can fall short if the closure is improperly sealed. Variables such as application torque, liner composition, thread design and induction seal consistency all influence the ability to maintain a reliable hermetic seal. For global suppliers operating multiple filling facilities, maintaining consistent torque and sealing specifications is especially important to ensure uniform product quality across sites. 

Whole-package testing more accurately reflects actual storage, distribution and consumer-use conditions. It helps identify potential leak paths, validates sealing performance, and provides a more realistic assessment of shelf life and product safety. Testing with the closure intact also offers greater flexibility, enabling measurement of both moisture ingress and egress – capabilities not available with bottle-only testing. 

Ultimately, while bottle-only testing supports material selection, whole-package testing confirms functional integrity across the supply chain, helping brands meet regulatory standards and consumer expectations with confidence.    

Recently published resources:

Advanced Permeation Applications Training: Customized Course for Best Practices

CO₂ Transmission Rate Test Methods: Benefits for Your Application
 

Want to learn more? Uncover a wealth of knowledge on similar topics and industries in our Resource Library.

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