Biodegradable and non-fibrous films and methods of forming the films

Abstract

Biodegradable and non-fibrous films and methods of forming the films are provided herein. In an embodiment, a biodegradable and non-fibrous film comprises a thermoplastic polysaccharide and a biodegradable polyester. The film has a thickness of from about 15 μm to about 250 μm. When the film has a thickness of 50 μm, the film has a water vapor transmission rate (WVTR) of from about 50 grams per square meter per day to about 2500 grams per square meter per day, as measured in accordance with ASTM E96-22 at a temperature of 38° C., a relative humidity of 90%, an airflow velocity of 0.3 m/s, and a barometric pressure of 941.2 mbar. In an embodiment, a method of forming the biodegradable and non-fibrous film comprises blending a thermoplastic polysaccharide and a biodegradable polyester to form an intermediate composition, and gel extruding the intermediate composition to form the film.

Dependencies are inferred from the claim text.