Thermoformed article made from renewable polymer and heat-resistant polymer

A method comprising the following steps:

• (1) providing 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.;
• (2) providing a heat-resistant polymer having:
• (a) a Ts of greater than about 60° C., and (b) a heat distortion index greater than about 50° C., wherein the Ts value and heat distortion index of the heat-resistant polymer is greater than that of the renewable polymer;
• and
• (3) coextruding the heat-resistant polymer and the renewable polymer to provide a thermoformable composite comprising:
• a core comprising the renewable polymer, wherein the renewable polymer comprises at least about 60% by weight of the composite;
• and
• a heat-resistant outer layer comprising the heat-resistant polymer which substantially surrounds the core and wherein the heat-resistant outer layer having a first and a second layer and the core being positioned between the first and second layers and wherein an interface is formed between the core and each of the first and second layers and wherein one or more of the interfaces provides an interpenetrating network.