Polymer material and method for the production thereof
AssigneeBiotec Biologische Naturverpackungen GmbH & Co. KG
InventorsHarald Schmidt, Christoph Hess, Johannes Mathar, Ralf Hackfort
Life of this patent
Estimating the term…
Abstract
A method for the production of a polymer material is shown and described, which is characterized by: (a) producing a mixture containing at least 1 to 75 wt.-% starch and/or starch derivative, 10 to 85 wt.-% polyester, and 0.01 to 7 wt.-% of a polymer containing an epoxy group; (b) homogenizing the mixture while supplying thermal and/or mechanical energy; (c) setting the water content of the mixture, so that the end product has a water content of less than approximately 12 wt.-%, in relation to the total composition of the mixture. The polymer material produced with the method according to the invention is characterized by outstanding mechanical properties.
Claims70
Method for producing a polymer material containing starch, comprising:
- (a) producing a mixture comprised of:
- 1 to 75 wt. % of starch and/or starch derivative;
- 10 to 85 wt. % of polyester;
- and
- 0.01 to 7 wt. % of an epoxide group-containing polymer;
- (b) homogenizing the mixture by supplying thermal and/or mechanical energy;
- and
- (c) setting the water content of the mixture, so that the end product has a water content of less than approximately 10 wt. % based on the total composition of the mixture.
Starch-containing, thermoplastically processable polymer material, comprising:
- less than 10 wt. % water, glycerol, sorbitol and/or mixtures thereof, based on the total composition,
- a polyester, and
- at least 34 wt. % starch,
- wherein the polymer material is adapted so that a film produced from the polymer material has an elongation at break in accordance with DIN 53455 of at least 200% and/or a dart drop value in accordance with ASTM 0-1709 of at least 5 g/pm.
Dependencies are inferred from the claim text.