Compound or film containing thermoplastic starch and a thermoplastic polymer
AssigneeAgrana StäRke GmbH
InventorsBarbara FAHRNGRUBER, Marnik Michel WASTYN, Martin KOZICH
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Abstract
The invention relates to a method for producing a compound or a film containing thermoplastic starch, an alpha-hydroxycarboxylic acid ROHCOOH, in which R is CH2 or CH3CH2, in an amount of from 0.1 to 5, preferably 0.1 to 3, particularly preferably 0.1 to 1 wt. % in relation to the thermoplastic starch, and a thermoplastic polymer, in which method the compound or the film is exposed during or after its extrusion to an additional heating step to 100-140° C. A thermoplastic starch usable for the production of the compound, a compound produced by the method, and a transparent film produced from such a compound are also described.
Claims21
-13. (canceled)
A method for producing a compound or film comprising:
- mixing a thermoplastic starch, an alpha-hydroxycarboxylic acid ROHCOOH, wherein R is CH2 or CH3CH2 in an amount of 0.1 to 5% by weight in relation to the thermoplastic starch, and a thermoplastic polymer to obtain a mixture;
- extruding the mixture to form a compound or a film;
- and
- heating the compound or film to 100-140° C. during or after extrusion.
Dependencies are inferred from the claim text.