The authors observed that moisture did not significantly
affect the mechanical properties and transition tempera-tures of the blends. On the other hand, on increasing the
starch moisture in the blends, an increase in water absorption was observed. In a previous study, our
research group produced films from TPS/PLA blends (90:10,80:20 and 70:30 w:w) and there was an increase in tensile strength and reduction in water vapor permeability with increasing concentration of PLA. Several studies have shown that coatings improve themechanical properties and water vapor barrier of starch films . Ryu et al. coated starch films by immer-sion in zein solution. The films were mechanically stronger and showed lower water solubility than films without zein, because zein is more hydrophobic than starch. Bangyekan