Overview of environmentally compatible polymeric materials for food packaging.

Publisher Summary Petrochemical-based plastics such as polyolefins, polyesters, and polyamides have been increasingly used as food packaging materials because of their availability in large quantities at low cost and favorable functionality characteristics such as good tensile and tear strength, good barrier properties to O2 and aroma compounds, and heat sealing. In contrast, they have a very low water vapor transmission rate and most importantly, they are totally non-biodegradable and therefore might potentially lead to environmental pollution, thus posing serious ecological problems. The combination of environmentally degradable plastic and composting is one of the best ways to control plastic wastes and hence environmental pollution. New biodegradable plastics should be a more appropriate option where the degradation constitutes a benefit in specific applications by defraying the cost inherent in the management of the disposal of post-consumer items. The improvement in polymer technologies and the use of smart additives is going to confer on bio-based packaging the same performance as conventional packaging, with the added value of compostability.

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