Study on antimicrobial activity of a food packaging material containing potassium sorbate
2000
Devlieghere,F. | Vermeiren,L. | Bockstal,A. | Debevere,J.
The feasibility of EVA/LLDPE films containing 1, 2 and 5% (w/w) K-sorbate to inhibit microbial growth and as a consequence prolong shelf-life of foods was investigated.Based on weight loss experiments it was shown that K-sorbate is very suitable for incorporation in LLDPE because of its heat stability during extrusion.After 3 weeks, resp.6.4, 2.8 and 5.7% of the incorporated sorbic acid was released into distilled water from films containing resp.1, 2 and 5% (w/w) K-sorbate.The very limited migration of K-sorbate may be explained by the incompatibility of the polar salt with the apolar LLDPE.This limited migration could explain the very small inhibitory effect of the K-sorbate films on the growth of Candida spp., Pichia spp., Trichosporon spp. and Penicillium spp.
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