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Radiation Physics and Chemistry
Year: 2009  |  Volume: 78  |  Issue: 7  |  Page No.: 553 - 555

The influence of electron-beam irradiation on some mechanical properties of commercial multilayer flexible packaging materials

Vitor M. Oliveira, Angel V. Ortiz, Nelida L. Del Mastro and Esperidiana A.B. Moura    

Abstract: The influence of electron-beam irradiation on mechanical properties of commercial multilayer flexible packaging materials based on coextruded and laminated polypropylene (PP), low-density polyethylene (LDPE), ethylene vinyl alcohol copolymer (EVOH) and poly(ethylene terephthalate) (PET), irradiated with doses up to 120 kGy, was studied. The tensile strength and elongation at break of the irradiated PET/PP film increase, while the penetration and sealing resistance decreased. In addition, the irradiated PET/LDPE/EVOH/LDPE film presented increase in the tensile strength on some radiation doses and decrease of the penetration and sealing resistance, except for sealing resistance at radiation dose of 15 kGy that resulted in a slight increase of ca 4%.

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