Thermo-sealed packaging bags from films based on thermoplastic corn starch (TPS) and talc nanoparticles were obtained. Talc concentrations higher than 3% w/w increased significantly stiffness
and yield stress of TPS films, without affecting their elongations at break. In addition, TPS films resilience was raised with 3% w/w talc incorporation, meanwhile significant differences in toughness
values were observed from 1% w/w particles concentration. These results indicate that TPS films reinforced with talc nanoparticles could be used to develop tougher and more resistant packages
without resigning ductility. Concerning packaging opening, it was demonstrated that TPS bags could only be torn, while talc incorporation allows a new bags opening way by peeling off. This
asseveration comes from tensile tests performed on thermo-sealed films which evidenced talc effect on failure modes of thermo-sealed TPS materials. Tightness of TPS packaging bags was
improved by 3% w/w talc mainly due to the enhancement of films water and oxygen barrier properties.