Starch foils and/or films and a method and use of a device for the production thereof

摘要

A method for producing starch films comprises the following steps: preparing a mixture comprising starch and water, wherein more than 50 weight percent of the starch is present in the form of particles of granular starch; shaping the mixture to form a film in a shaping process; solidifying the mixture by increasing the temperature of the mixture during and/or after the shaping process by more than 5° C. Films produced by this method have starch particles bonded to one another. A device for performing this method comprises a shaping device for enabling shaping of the starch material to form a film, and has a heating device for performing a heat treatment for destructuring of the starch during and/or after the shaping.

主权项

1. A casting method for producing a foil and/or film based on starch wherein a mixture comprising starch, in which more than 50 weight percent of the starch in a liquid phase is present as particles of granular starch, which is destructured at most up to stage 2.2, is cast without using an extruder and shaped to form a film and during and/or after this shaping the mixture is solidified by an increase in temperature by destructuring the granular starch,
wherein starch being destructured to stage 2.2 is defined in that 50-60% of the starch grains are no longer birefringent in a polarization microscope.