The versatility and low cost of production of polyolefin resins such as polyethylene and polypropylene, added to their good properties and easy processability make them stand out in films and packaging applications. Currently, every food product has an associated packaging. Besides functions such as protection and conservation, packages also have the function of identifying and providing product information, as well as being responsible for the commercial appeal of the product. Thus, printing the labels is an essential step in the process of food packaging. However, such films have limitations on the adhesion of paints because they have low surface energy. Industrially, there are several techniques used for surface modification of polymer films. One of the most widely used industrial techniques to raise the surface energy of the films is the treatment by corona discharge. This study aims to evaluate the influence of variable parameters of the corona treatment (winding speed and discharge potential) of polymeric films on the adhesion properties of paints, degree of surface modification and stability of surface energy as a function of time. The study is based on films of polypropylene (PP). The activities are summarized basically in extruding films of PP and submit them to the corona treatment varying the speed and potential discharge during the process and to characterize the films with and without treatment to evaluate properties of surface energy and adhesion in inks of nitrocellulose-polyamide base. The characterization tests used were: contact angle, surface energy, adhesion analysis of paint, gloss, scratch and folding. Preliminary results showed that processing the films with lower winding speeds and greater potential discharge resulted in films with higher surface energy and better adhesion to paints.