foamed film made in part or whole with renewable, recyclable andor biodegradable materials.p&g&rsquos proposed solution is to employ a film made from a renewable polymer that can be foamed as a thin layer with gaseous bubbles or cells.according to the patent, the foamed thin film includes a biobased content of between about 10 and 100, a caliper of between 10 and 250 microns, and a density reduction of between 5 to 50 compared to nonfoamed film of about the same caliper.while foamed polymers are nothing new, targeting a renewable material in this manner brings something new to the packaging.    
