This research focuses on the possibility of improving properties of high-density polyethylene-based nanocomposite films for packaging applications, using a high aspect ratio layered silicate named fluoromica. Three different compatibilizers [ethylene vinyl acetate copolymer and two grades of maleic anhydride grafted high-density polyethylene (HDPE-g-MA) with different melt flow indices] were examined to explore the effects of compatibilizer polarity and molecular weight on the state of nanoclay dispersion. Owing to the direct correlation between nanocomposites morphology and rheological behavior, a quite extensive survey of the role of different material variables was carried out via measuring rheological properties in linear viscoelastic region. Percolation threshold () were determined by analyzing the improvement in dynamic viscosity in low-frequency region and also, by means of a predicted mathematical model obtained from experimental design. It was found that the HDPE-g-MA compatibilizers result in lower and better clay dispersion, particularly in the case of high MFI resin. Microstructural characterization of the samples was studied by X-ray diffraction and transmission electron microscopy as well.