Cryovac, Inc.

A Victoria Nawaby

Natarajan S Ramesh

Robert Babrowicz

Eric D Kragness

Eugenio Longo

Nilesh Amrutiya

Some embodiments of the present invention provides a method of preparing a thermoformed article composed of polylactic acid that includes the steps of providing a foam sheet comprising polylactic acid having a D-lactic acid stereo-isomer content that is about 3 mole % or less, exposing the sheet to a temperature of at least about 190&#xb0; C., and forming the heated sheet in a mold at a mold temperature that is at least about 50&#xb0; C. and for a length of time to form a thermoformed article having a PLA crystalline content of at least about 10%. Surprisingly, it has been discovered that heat resistant thermoformed articles can be prepared in accordance with embodiments of the invention wherein the time required for forming the foam sheet into a molded article is less than about 10 seconds.

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Southlake, TX, United States of America

A Victoria Nawaby