Multilayer polymeric film having dead bend characteristics
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United States of America Patent
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Nov 21, 1989
Grant Date -
N/A
app pub date -
Oct 30, 1987
filing date -
Oct 30, 1987
priority date (Note) -
Expired
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Abstract
A multilayer polymeric film having dead bend characteristics which are substantially planar isotropic is a laminate of at least two layers of one or more polymeric films, in which: A. each polymeric film layer is highly oriented in one direction, such that each polymeric film layer has dead bend properties with respect to bending deformations substantially normal to the direction or orientation; and B. the direction of orientation of each polymeric film layer forms an angle of at least about 30 degrees with the direction of orientation of each adjacent polymeric film layer. A method for making the multilayer polymeric film having dead bend characteristics also is provided.
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