Ethylene-vinyl alcohol (EVOH) is a semi-crystalline copolymer consisting of monomer units of ethylene and vinyl alcohol. Polyamide 6 (PA6) is also a semi-crystalline polymer with a lower crystallization rate than EVOH. Thanks to the excellent barrier proprieties of EVOH to oxygen, non-polar solvents and food aromas under dry conditions[1] and the outstanding mechanical propriety of PA6[2] , these materials are widely used in food packaging, building, and automotive applications. As the first step in this work, EVOH and PA6 blends were produced with a twin-screw extruder at several compositions. Those mass ratios of EVOH/PA6 are respectively 15/85, 30/70, 50/50, 70/30, 85/15. As a second step, EVOH/PA6 blends are used to produce multilayer films. After peeling off the outside layers, pure thin films of EVOH/PA6 with different compositions are used to analyze their thermal proprieties by differential scanning calorimetry (DSC), the morphological proprieties by SEM Microscopy; the dynamic mechanical proprieties by DMA and tensile tests; in addition to their barrier properties. The thermal and thermomechanical analyses of the blends show that the melting, crystallization, and mobility of polymer chains are affected by the blend composition. Nevertheless, microscopic and thermal investigations reveal the differences in the microstructure of the two-blend systems. As for the tensile tests, PA6 dominant blends show better results. The break deformation of blends injected specimens with 70% PA6 is 275% compared 29% of which with 30% EVOH and 18% for pure EVOH; for the film samples in machine direction, the break deformation for 85% PA6, 85% EVOH and pure EVOH are 126%, 37%, and 25%, respectively. Moreover, gas permeability measurements on blown films represent that by increasing EVOH composition, the film has better barrier properties. More detailed results will be performed in the following presentation. Références [1]A. Blanchard, F. Gouanvé, E. Espuche. Effect of humidity on mechanical, thermal and barrier proprieties of EVOH films, 2017, Journal of Membrane Science Vol 540, 1-9.[2]L. W. McKeen. “Film Proprieties of Plastics and Elastomers”,2017