| abstract |
The present invention provides a biodegradable polymer composition useful for manufacturing biodegradable in which, the process comprising: (1) providing a renewable polymer and/or natural fiber having: (a) a T s 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 T s of greater than about 60°C; and (b) a heat distortion index greater than about 50°C, wherein the T s value and heat distortion index of the heat-resistant polymer is greater than that of the renewable polymer and/or natural fiber; and (3) coextruding the heat-resistant polymer and the renewable polymer to provide a theπnoformable composite comprising a core comprising the renewable polymer and/or natural fiber, wherein the renewable polymer and/or natural fiber comprises at least about 50% by weight of the composite and a heat-resistant outer layer comprising the heat-resistant polymer which substantially surrounds the core. |