This paper follows up on recent results from our laboratory pertaining to the use of silane coupling agents in polypropylene-clay nanocomposites. The object of the present work was to locate the silane coupling agent at both faces and edges of the nanolayers and prepare nanocomposites of a polypropylene copolymer with the resulting nanoclay ( at 5 wt% and 8 wt%) for film blowing. A 2:1 ratio of maleated PP copolymer as compatibilizer to organoclay was effective in producing very good dispersion of the nanolayers as seen from transmission electron micrographs of the compound before film blowing. 1 mil thick films of the nanocomposite --with coupling at both faces and edges-- and the unfilled polypropylene were prepared with a blow-up ratio of 3.2 and characterized for mechanical properties and morphology. The nanolayer orientation distribution in the blown film as well as the lamellar orientation were examined with SEM and FESEM respectively. Refractive index measurements and mechanical testing revealed that blown films of the nanocomposite were more isotropic in the plane of the film than films of the neat PP. These trends may be understood in terms of the orientation distributions of the crystalline lamellae in the films. FESEM images revealed that cross-hatching of lamellae was absent from the blown film of unfilled PP but pervasive in the blown film of nanocomposite. The rectangular nanolayers were seen to be oriented in the plane of the film with the longer dimension largely along MD. The lower extent of lamellar orientation around nanolayers may be attributed to the strong reduction in mobility of the chains attached to the nanolayers.