Thermal,mechanical and permeation properties of gamma-irradiated multilayer food packaging films containing a buried layer of recycled low-density polyethylene |
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| Affiliation: | 1. Laboratory of Food Chemistry and Technology, Department of Chemistry, University of Ioannina, GR-45110 Ioannina, Greece;2. Department of Materials Science and Technology, University of Ioannina, GR-45110 Ioannina, Greece;1. Escuela Técnica Superior de Ingenieros Industriales, Universidad Politécnica de Madrid (ETSII-UPM), José Gutiérrez Abascal 2, 28006 Madrid, Spain;2. Instituto de Ciencia y Tecnología de Polímeros (ICTP-CSIC), Juan de la Cierva 3, 28006 Madrid, Spain;1. Akdeniz University, Faculty of Agriculture, Department of Agricultural Structures and Irrigation, 07070 Antalya, Turkey;2. Cukurova University, Faculty of Agriculture, Department of Agricultural Machinery, 07070 Adana, Turkey;1. Israeli Air Force, Fuel and Chemistry Department, Israel;2. Department of Materials Engineering, Ben-Gurion University of the Negev, Beer-Sheva, Israel;3. Department of Chemical Engineering, Ben-Gurion University of the Negev, Beer-Sheva, Israel;1. Centro de Investigación en Alimentación y Desarrollo, A.C., CTAOV, Km. 0.6 Carr. a La Victoria, A.P. 1735, 83304 Hermosillo, Sonora, México;2. Departamento de Investigación en Física, Universidad de Sonora, A.P. 5-088, 83190 Hermosillo, Sonora, México;3. Centro de Investigación y Estudios Avanzados del IPN Unidad Mérida, Laboratorio Nacional de Nano Biomateriales, A.P. 73, Cordemex, 97310 Mérida, Yucatán, México;4. National Centre for Electron Beam Research, Texas A&M University, College Station, TX, USA;1. Friedrich-Alexander-Universität Erlangen-Nürnberg, Professorship for Aroma Research, Emil Fischer Centre, Department of Chemistry and Pharmacy, Henkestraße 9, 91054 Erlangen, Germany;2. Fraunhofer Institute for Process Engineering and Packaging IVV, Giggenhauser Straße 35, 85354 Freising, Germany;1. Laboratory Dynamics, Interactions and Reactivity Systems, university of Ouargla, 30000Ouargla, Algeria;2. Laboratory of Polymeric Materials Multiphasic, Faculty Of technology, University Ferhat ABBAS, Sétif 19000, Algeria |
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| Abstract: | The effect of gamma radiation (doses 5–60 kGy) on the thermal, mechanical and permeation properties, as well as on IR-spectra of experimental five-layer food packaging films were studied. Films contained a middle buried layer of recycled low-density polyethylene (LDPE) comprising 25–50% by weight of the multilayer structure. Representative films containing 100% virgin LDPE as the buried layer were taken as controls. Results showed that the percentage of recycled LDPE in the multilayer structure did not significantly () affect the melting temperature, tensile strength, percent elongation at break, Young's modulus, oxygen, carbon dioxide and water vapour transmission rate values and the IR-spectra of the non-irradiated and irradiated multilayer films. Irradiation (mainly the higher dose of 60 kGy) induced certain small, but statistically significant () differences in the mechanical properties of multilayer films (with or without recycled LDPE layer) while no significant differences were observed in the thermal properties and in the gas and water vapour permeability of multilayer films. The above findings are discussed in relation to the good quality of the pre-consumer scrap used in the present study. |
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