Single or multilayer foil having a layer containing thermoplastically processable starch
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United States of America Patent
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Jun 5, 2001
Issued Date -
N/A
app pub date -
Jul 18, 1994
filing date -
Dec 26, 1991
priority date (Note) -
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status (Latency Note)
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Abstract
A single-layer or multiple-layer foil of substantially reduced gas-permeability comprises at least one layer which consists, at least in part, of substantially thermo-plastically processable starch. In order that this single-layer or multiple-layer foil is at least approximately insensitive to moisture it is proposed that at least one layer comprises furthermore at least one hydrophobic polymer, such as a polyolefin, which is mixed with the starch upon the production of said at least one layer, and/or that the starch is at least partially cross-linked on the surface of said at least one layer and/or that said at least one layer is covered by at least one additional layer which is at least approximately insensitive to moisture.
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