Multilayer film including a polyurethane
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United States of America Patent
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-
Oct 20, 1981
Grant Date -
N/A
app pub date -
Dec 26, 1979
filing date -
Dec 26, 1979
priority date (Note) -
Expired
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Abstract
A flexible biaxially oriented multilayer film includes at least one layer having a thickness of at least about 0.5 mil and consisting essentially of an aromatic polyurethane, the film having been subjected to a biaxial stretching in the range of from about 12 to about 18, preferably about 16.
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