1,720,975 research outputs found
Influence of composition on structure and barrier properties of active PET films for food packaging applications
No full textThis work is focused on the production and characterization of monolayer poly(ethylene terephtalate)
(PET) active films at different concentrations of an oxygen scavenger by cast extrusion process.
Rheological, thermal, morphological analyses and oxygen absorption measurements were carried out on
the produced samples to investigate the structure of active PET films and to determine their scavenging
properties.
Overall migration analyses were performed on active films to asses their safety in use with foodstuff, and
finally the produced films were used to package fresh banana slices for evaluating their capability in quality
foods preservation
Production and characterization of active transparent PET films for oxygen sensitive Foods Packaging
No full textProduction of Active PET Films: Evaluation of Scavenging activity
No full textThe current trends in packaging technology are focusing on the development of functional materials that interact with the environment and with the food, playing an effective role in the preservation of quality. In particular, the so-called active
packaging technologies were developed as a response to the market needs for minimally treated foodstuffs, in order to preserve their freshness and flavours by regulating the gas composition of the packaging headspace through active
scavengers. One of the most promising approaches for this technology is the incorporation of active scavengers into a polymeric matrix. Nevertheless, the design and the production of a functional and effi cient active fl exible package can
be difficult to realize because of the complexity of the system. This work was thus focused on the production and the analysis of monolayer polyester films containing an oxygen scavenger. The active fi lm was obtained by adding the active phase into
a polyethylene terephthalate matrix during the extrusion process. The barrier properties of the fi lms were investigated by means of conventional permeability measurement, to assess their activity with respect to oxygen. Additionally, the oxygen absorption of the active samples was analysed by an innovative oxygen meter system, in order to determine their scavenging capacity and reaction kinetics.
The analysis of colour was carried out on packaged fresh apple slices, to verify if the active fi lms produced were able to limit the oxidation processes on a sensitive food. Finally, the optical properties of the samples were investigated through haze
measurements
Preparazione e caratterizzazione di film nanocompositi a base di PLA
No full textL’obiettivo di questo lavoro è di identificare la migliore combinazione dei materiali e delle condizioni di processo per la produzione di film nanocompositi a base di PLA come soluzione innovativa di imballaggio ecocompatibile. Le miscele a diversi contenuti e tipologie di silicato sono state preparate mediante melt compounding utilizzando un estrusore bivite. Le prestazioni dei film, prodotti con un impianto in scala da laboratorio, sono state correlate alla corrispondente morfologia
Effect of a polymeric oxygen scavenger on barrier properties of coextruded active PET films
No full textPRODUCTION AND PROPERTIES OF MULTILAYER ACTIVE POLYESTER FILMS FOR FOOD PACKAGING APPLICATIONS
No full textEffect of oxygen scavenger fillers on mechanical and barrier properties of a PET monolayer film
No full text- …
