Thermoformed article made from renewable polymer and heat-resistant polymer
The present invention provides articles comprising a thermoformable composite comprising: a core comprising a renewable polymer having: (a) a Ts value of up to about 90° C.; and (b) a heat distortion index of up to about 90° C.; and a heat-resistant outer layer substantially surrounding the core and comprising a heat-resistant polymer having: (a) a Ts of greater than about 60° C.; and (b) a heat distortion index of greater than about 50° C.; wherein the renewable polymer comprises at least about 60% by weight of the composite, and wherein the heat-resistant polymer has a Ts value and heat distortion index greater than that of the renewable polymer. The present invention also provides methods for coextruding the heat-resistant polymer outer layer and renewable polymer core to provide a thermoformable composite.
International Paper Company
B Y B Y Y Y Y B Y B B Y Y B B B B Y B Y B B Y Y B
B32B Y10T B32B Y10T Y10T Y10T Y10T B32B Y10T B32B B32B Y10T Y10T B32B B32B B32B B32B Y10T B32B Y10T B32B B32B Y10T Y10T B32B
inventional additional inventional additional additional additional additional additional additional additional inventional additional additional inventional additional additional additional additional inventional additional additional inventional additional additional inventional
Richard A. Wei
Tedford, Jr. Li