Ensuring Food Safety: Vital Moisture Barrier Testing for Military Food Packaging Military operations and strategic reserves demand food with a long shelf life. This extended durability relies heavily on superior packaging that can protect food quality under diverse conditions. This article utilizes the Labthink C330H Water Vapor Transmission Rate Tester to evaluate a military food packaging material, including the test principle, process, instrument parameters, and scope of application, offers a reference for monitoring and selecting effective moisture barrier packaging solutions. During military operations or special missions, food is an indispensable supply for maintaining troop vitality and enhancing combat effectiveness. Considering military strategy and material reserves, military food generally has a shelf life of more than 2 years, which requires its packaging materials to have excellent performance to ensure the food remains in good quality during storage. Furthermore, the uncertainty of supply and environmental conditions places higher demands on packaging materials. Among these, moisture barrier performance is one of the important properties of military food packaging, it is a key factor affecting the amount of water vapor permeating from the environment into the package. Moisture creates condition for microbial growth and reproduction, therefore food is prone to absorbing moisture, caking, and softening, and increases the risk of mold when exposed to moisture.
Open the catalog to page 1Using packaging materials with high water vapor barrier properties (i.e., excellent moisture resistance) can significantly reduce the amount of water vapor permeating into the package, playing an important role in preventing food spoilage. A fundamental characteristic of military food packaging is compact, as the advancements in packaging technology and polymer materials, military food packaging is shifting from tin cans towards lighter, more compact soft plastic composite bags and tubes. Since different flexible materials have varying moisture barrier properties, rigorous testing and monitoring...
Open the catalog to page 2the film to the low-humidity side. The permeated water vapor is then carried by the dry nitrogen to an electrolytic moisture sensor. This sensor detects the electrical signal resulting from water vapor, the system calculates the water vapor concentration. For testing complete packages, dry nitrogen flows inside the package, while the outside is exposed to high humidity. Test sample and process Test sample: testing the water vapor transmission rate of an aluminum-plastic composite film used for military food packaging. Test Process: 1. Sample Preparation: Three specimens are cut from the packaging...
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