Abstract:A simple method for melt blending of nylon 6(PA6) and semi-aromatic nylon(MXD6) was used to improve the barrier properties of PA6 films. A series of PA6/MXD6 blends were prepared, and then blown into films. The effects of addition of MXD6 on the properties of the PA6/MXD6 films were investigated by DSC, XRD, haze test, permeability test, and so on. In addition, considering the application of PA6 films in the field of anti-cooking and packaging, the effect of high temperature cooking on the microstructure of PA6/MXD6 blends was discussed. The oxygen permeability coefficient of PA6/MXD6 film is significantly reduced with addition of MXD6, improving the barrier property of the films. The best barrier performance is achieved when the content of MXD6 is 20%. The addition of MXD6 can also significantly increase the transparency of the PA6 film, and the tests found that the haze of PA6/MXD6 films is decreased with increasing of the MXD6 content. And the haze of PA6/MXD6 film is only 3.59% when the MXD6 content is 50%. DSC and XRD results indicate that the high temperature cooking process can increase the crystallinity degree of PA6/MXD6 films and promote the transformation of γ crystals to α crystals. PA6/MXD6 films are easy to produce on a large scale, and the basic research on PA6/MXD6 films is of a great significance.