Accession Number : ADA553338


Title :   Determining Permissible Oxygen and Water Vapor Transmission Rate for Non-Retort Military Ration Packaging


Descriptive Note : Final rept. Mar 2009-Jan 2010


Corporate Author : ARMY NATICK SOLDIER RESEARCH DEVELOPMENT AND ENGINEERING CENTER MA


Personal Author(s) : Froio, Danielle ; Wright, Alan ; Favreau, Nicole ; Schirmer, Sarah


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a553338.pdf


Report Date : Nov 2011


Pagination or Media Count : 32


Abstract : This report documents a study that was conducted by the Department of Defense (DoD) Combat Feeding Directorate at the Natick Soldier Research, Development and Engineering Center (NSRDEC) to determine baseline barrier requirements, such as oxygen transmission rate (OTR) and water vapor transmission rate (WVTR), for the non-retort pouch found in the Meal, Ready to EatTM (MRETM) individual ration. During this study, cracker samples were packed in pouches with known permeation to oxygen and water vapor. Cracker pouches were then stored under controlled environmental conditions. Crackers were pulled from storage at predetermined intervals and tested for various attributes, such as sensory quality, moisture content, water activity, texture, and headspace. From the sensory analysis it was found that the required WVTR for the non-retort pouch to meet a 3-year shelf life is at least 0.13 g/m2/d, using the current units for WVTR that are found in military specification PCR-C-037. However, when taking into account pouch size, which is a more accurate and realistic way to determine and specify required WVTR, the allowable water vapor ingress is 0.004 g/pouch/d. Cracker samples used to determine permissible OTR did not fall below the overall quality requirement for sensory attributes during the 32-week study. Thus, an allowable OTR for the non-retort pouch cannot be calculated from the results obtained.


Descriptors :   *DATA TRANSMISSION SYSTEMS , *MILITARY RATIONS , *OXYGEN , *WATER VAPOR , BARRIERS , DATA RATE , FOOD PRESERVATION , MOISTURE CONTENT , PACKAGING , PERMEABILITY , POLYMERS , SHELF LIFE , STORAGE , TEXTURE


Subject Categories : Food, Food Service and Nutrition
      Inorganic Chemistry
      Telemetry


Distribution Statement : APPROVED FOR PUBLIC RELEASE