Shelf life health bar in different biobased packaging materials

Researchers at Clemson University US compared the shelf life of an intermediate moisture chocolate health bar in its current package to the shelf life of the same health bar in two different biobased packages. The two biobased packaging materials were polylactic acid (PLA) and sugarcane polyethylene (SPE). The two biobased materials were each laminated to metallized cellophane (Met-Cell). Duplicating the original package, the biobased packages were created using a double heated bar sealer.
They found that the PLA package compared best to the original package. The water activities and the moisture contents of the health bars in the PLA packages kept them microbiologically safe.
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