Patent ID: 8466337

Claim:
A biodegradable, breathable film comprising: a thermoplastic starch, wherein the thermoplastic starch is present in an amount ranging from about 20% to about 30% by weight of the film; a filler selected from inorganic fillers, organic fillers, and mixtures thereof, wherein the filler is present in an amount ranging from about 25% to about 35% by weight of the film; and a biodegradable polymer resin comprising an aliphatic-aromatic copolyester that is polybutylene adipate terephthalate, wherein the biodegradable polymer resin is present in an amount ranging from about 39% to about 45% by weight of the film, wherein the film after stretching has a water vapor transmission rate of about 2000 g/m 2 /day to about 2800 g/m 2 /day.