Conclusions New biodegradable TPS/PLA/NaMMT nanocomposites withhighly exfoliated clay morphology were prepared of the in aneconomically viable method. In spite of the inherent immiscibil-ity of the blend constituents the blend/clay nanocomposites wasappeared as mechanically improved material, due to the action ofnanoclay. The effect of nanoclay on the blend system was inter-preted as compatibilization; because of its extensive exfoliation,the dispersed clay platelets could reinforce the system success-fully. Better resistance towards water absorption could be achieveddue to the blending of hydrophobic PLA to TPS. The increased ther-mal characteristics were because of the exfoliation as the NaMMTlayers, which acted as barriers to heat transfer. Because of itsrenewability, biodegradability and low cost, starch seems to benowadays an important challenger for the development of futureagro-based products, when petroleum resources are fast decreas-ing. They are in tune with the concept of sustainable development.