This document discusses various materials and technologies used for heat sealable and peelable films for food packaging applications. It describes different polymer compositions that can be used for sealant layers including polypropylene, polyethylene, ethylene vinyl acetate copolymers, and amorphous polyesters. It also summarizes several prior art technologies for producing peelable films, including offline coating, inline coating, extrusion coating, and melt/slot coating. Finally, it provides details on specific multilayer film technologies from companies like Mitsubishi, Terphane, Eastman Chemical, DuPont, Toray, and Presto Products.