Selection Of Map Materials

Determining the optimal atmosphere/packaging material requirements for MAP of fresh-cut produce is a complex task. Various researchers have worked to develop mathematical models to aid package material selection. Information about the various mathematical models can be obtained by referring to references provided by Zagory and Kader (7). However, use of these models to select MA package design criteria cannot be relied upon exclusively. Empirical testing of selected packaging is absolutely essential for ultimate successful use of MAP (10).

MAP of fresh-cut produce requires careful selection of polymeric packaging materials especially with regard to their permeability to oxygen, carbon dioxide, and water vapor. It is necessary that the polymeric material selected be three to six or more times more permeable to carbon dioxide than to oxygen. Polymeric materials potentially suitable for MAP fresh-cut produce include low-density polyethylene (LDPE), linear low-density polyethylene (LLDPE), medium-density polyethylene (MDPE), high-density polyethylene (HDPE), polypropylene (PP), polyvinyl chloride (PVC), polystyrene (PS), ethylene vinylacetate (EVA) copolymers, ionomers, and polybutylene (10).

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