Method for Forming a Thermoplastic Composition that Contains a Renewable Biopolymer

A method for forming a film, the method comprising:

• supplying a renewable biopolymer, polyolefin, and a compatibilizer to a feed section of an extruder, wherein the compatibilizer has a polar component and a non-polar component;
• directly injecting a liquid plasticizer into the extruder so that the plasticizer mixes with the biopolymer, polyolefin, and compatibilizer to form a blend;
• melt processing the blend within the extruder to form a thermoplastic composition;
• and
• extruding the thermoplastic composition through a die and onto a surface to form the film, wherein the film has a thickness of about 50 micrometers or less.

A method for forming a thermoplastic composition, the method comprising:

• supplying a renewable biopolymer, biodegradable polymer, polyolefin, and a compatibilizer to a feed section of an extruder, wherein the compatibilizer has a polar component and a non-polar component;
• directly injecting a liquid plasticizer into the extruder so that the plasticizer mixes with the biopolymer, polyolefin, and compatibilizer to form a blend;
• and
• melt processing the blend within the extruder to form the thermoplastic composition.