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Manufacturing Multi-degradable Food Packaging Films and Their Degradibility  

Chung, Myong-Soo (Multicom Post Korea Corporation)
Lee, Wang-Hyun (Multicom Post Korea Corporation)
You, Young-Sun (Multicom Post Korea Corporation)
Kim, Hye-Young (Multicom Post Korea Corporation)
Park, Ki-Moon (Department of Food and Life Science, Sungkyunkwan University)
Publication Information
Korean Journal of Food Science and Technology / v.35, no.5, 2003 , pp. 877-883 More about this Journal
Abstract
Multi-degradable master hatch (M/B) was prepared and 0.05 mm polyethylene (PP) food packaging films containing 0, 10, and 20% M/B were manufactured by inflation film processing. The films were exposed to UV radiation, fungi, and heat in order to observe their photolysis, biodegradability, and thermal degradability, respectively. While pure PP film maintained more than 70% of its original elongation after 8 weeks of UV radiation, an almost perfect loss in the elongation of PP film containing 20% M/B was observed. Significant decreases in elongation of PP films by heat treatment $(68{\pm}2^{\circ}C)$ were also found in samples containing the multi-degradable M/B. By observing changes in film surface after the inoculation of fungi using scanning electron microscopy (SEM), the biodegradability of plastic film could be accelerated with the addition of multi-degradable M/B. The results of the mulching test in yard showed that adding multi-degradable M/B can effectively degrade plastic films in natural environmental conditions without interrupting the growth of plants.
Keywords
multi-degradable master batch (M/B); polypropylene (PP) food packaging film; photolysis; biodegradability; thermal degradability; mulching test;
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