NATURAL POLYMER BASED CLING FILMS FOR FOOD PACKAGING
Journal Title: International Journal of Pharmacy and Pharmaceutical Sciences - Year 2015, Vol 7, Issue 4
Abstract
In the last decades, there has been a marked increase in the use of natural polymer based film materials in packaging, which prevents food from external contamination, retardation of deterioration by extension of its shelf life and maintenance of its quality and safety. Natural polymer based cling films for food packaging can replace the non-biodegradable petroleum-based synthetic polymers at a low cost, thereby producing a positive effect both environmentally and economically. This review aims to obtain a better understanding of use of natural polymers based cling films available for food packaging which include: protein based edible films and films from cellulose and its derivatives. Protein-based edible films offer alternative packaging sources that can be used for versatile food products to reduce loss of moisture from food, can restrict the absorption of oxygen, lessen the migration of lipids, improving mechanical handling properties, and can provide physical protection to food. Cellulose derivatives are a class of natural polymers in which cellulose is swollen to form films with higher tensile strength and improved water vapor properties. However, currently research is focusing on the blending, layering, and filling cellulose derivatives with different biopolymers or synthetic polymers to enhance the mechanical and barrier properties, therefore strengthening their position in competition with other packaging materials available for food packaging. Cling films are synthesized involving biopolymers and the preparation of their modified derivatives to develop a class of natural packaging films which will revolutionize the food packaging industry using various different formulations. The aim in future is to come up with best films for the food industry by increasing their shelf lives and by validating the films according to ASTM standards for food packaging.
Authors and Affiliations
Bhanu Malhotra, Anu Keshwani, Harsha Kharkwal
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