POLYESTER ALUMINIUM ADHESION - IMPROVEMENT BY HEAT-TREATMENTS/

Because or its industrial importance, poly(ethylene terephthalate) (PE T) has been the subject of numerous studies concerning surface modific ations in order to improve its bonding ability. Most of these treatmen ts undertaken before the metallization provide good dry adhesion of va pour deposited metallic layers. But, food packaging applications requi re also good wet adhesion and strong oxygen barrier properties. Heat t reatment was found to improve these properties. Hence, the aim of this study was to find out the experimental requirements for an efficient heat treatment of the metallized PET films suitable for an industrial process. The adhesive performance of aluminized polyester films have b een assessed by use of an ultrasonic vibrations test.