SEALING THROUGH CONTAMINATED POUCH SURFACES
ARMY NATICK LABS MA GENERAL EQUIPMENT AND PACKAGING LAB
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Examination of a large number of thermally processed flexible packages has shown that the primary cause of package failure can be attributed to occluded matter in the closure seal. This study indicated that by using a curved-bar sealing system reliable closure seals are attainable even when the sealing surfaces are heavily contaminated with grease or covered with water. Even without precise control of all sealing conditions, a significant improvement in seal reliability was obtained by use of curved sealing bars. Steam-flushing of the closure area was effective in reducing headspace gas volume and removing particulate contaminants from the sealing surfaces of flexible packages. Curved-bar closure seals applied after steam-flushing produced highly efficient seals.
- Food, Food Service and Nutrition
- Containers and Packaging