MVTR VS CORROSION IN MILITARY PACKAGING
ARMY WEAPONS COMMAND ROCK ISLAND IL ROCK ISLAND
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In normal level A packaging the moisture is excluded through the use of packaging material characterized by an extremely low moisture vapor transmission rate and a water repellant preservative. A series of tests were conducted to determine the relationship of the MVTR of packaging materials to the protection afforded packaged items. These tests consisted of a packaging small steel panels in bags composed of various packaging materials with either a pseudo-preservative or no preservative and b storing the completed package at various conditions of temperature and humidity with periodic examination for evidence of corrosion on the steel panels. Data taken from these tests demonstrates the inability of even the best packaging materials, in the absence of an effective preservative, to protect against corrosion for any appreciable period of time when stored under corrosive conditions. It is concluded, therefore, that the MVTR of the packaging material is unimportant to the protection of corrosive items since such protection must be provided by a preservative.
- Containers and Packaging