method for forming a thermoplastic polymeric film, and thermoplastic polymeric film including two or more polymer layers

摘要

METHOD FOR FORMING A THERMOPLASTIC POLYMERIC MOVIE, AND THERMOPLASTIC POLYMERIC MOVIE INCLUDING TWO OR MORE POLYMER LAYERS. A thermoplastic polymeric film (110) including two (112, 113) or more polymer layers, which film has a series of oscillating peaks and valleys, whose peaks and valleys extend in a first direction forming continuous ridges with at least one layer of peaks. polymer disproportionately divided into peaks and at least a second polymer layer such that two or more polymer layers vary in thickness by film width, and a method for making the film.