RESISTANCE OF FLEXIBLE PACKAGING MATERIALS TO PENETRATION BY MICROBIAL AGENTS
Final rept, 21 Jun 1965-Jun 1966
FMC CORP SANTA CLARA CA CENTRAL ENGINEERING LABS
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The project was conducted to study the resistance of flexible packaging materials used for thermally processed foods to penetration by microbial agents. Microbial agents were defined as bacterial cells being both aerobic and viable. A procedure was evolved and equipment designed to study microbial penetration of flexible packaging materials. The microbial penetration studies were made upon films, aluminum foils and laminates in sheet form. Creased films and laminates in sheet form and laminates in pouch form were subjected to abusive treatments. Microbial penetration occurred only when pinholes were present in the materials. The 3-ply laminates approved for thermo processing when checked in sheet form, did not experience microbial penetration nor were pinholes present. Creasing did not influence microbial penetration. Laminates having polypropylene in their composition did not survive the abusive treatments.
- Containers and Packaging