A review: Breathable films for packaging applications |
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| Affiliation: | 1. Beijing Key Laboratory of Lignocellulosic Chemistry, Beijing Forestry University, Beijing 100083, China;2. Department of Chemistry, Renmin University of China, Beijing 100872, China;3. Center for Lignocellulose Science and Engineering, Liaoning Key Laboratory of Pulp and Paper Engineering, Dalian Polytechnic University, Dalian 116034, China |
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| Abstract: | Various packaging technologies have been developed to meet continuously increasing consumer demand for comfortable and safe use, convenience of use, and fresh quality of packaged products. Porous and breathable films provide various advantages such as the minimization of anaerobiosis originating from the accumulation of CO2 in packaging and the automatic release of steam in a microwave system. Non-porous breathable films are among the alternative candidates for packaging applications and they can respond to desired and undesired temperature fluctuations by reversibly changing the gas permeability depending on the temperature change. They can also prevent problems related to packaging integrity such as the intrusion of insects and microorganisms through perforations, undesired permeation of moisture, and loss of flavor in agricultural products and food. This review mainly addresses porous and non-porous breathable films that are responsive to stimuli like temperature changes. Further, the importance and possible packaging application areas of non-porous breathable films with temperature-dependent gas permeabilities are briefly identified. |
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| Keywords: | Porous breathable films Non-porous breathable films Temperature-dependent gas permeability Packaging for agriculture and microwavable products Packaging for various sterilization conditions |
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