| abstract |
A method and system for melt processing a thermoplastic composition containing a starch and a plasticizer is provided. The composition is mixed in the molten state and extruded through a die to form an extruded product, which is then cooled by the use of a multi-stage system of the present invention that includes at least one water cooling stage. and at least one stage of air cooling. More particularly, the extruded product is initially contacted with water for a certain period of time so that it partially cools and solidifies on its surface. After the stage (s) of cooling with water, the extruded product is further subjected to at least one stage of cooling with air in which a stream of air is placed in contact with the extruded product. |