MULTIPLE DRAW GAP LENGTH ORIENTATION PROCESS
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United States of America Patent
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Issued Date -
Apr 10, 2008
app pub date -
Oct 6, 2006
filing date -
Oct 6, 2006
priority date (Note) -
Abandoned
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Abstract
A method of forming an optical film includes stretching a polymer film in first draw gap of a first length along a machine direction, at a first draw ratio; and further stretching the polymer film in second draw gap along a machine direction, wherein the step of stretching in the first draw gap is isolated from the step of stretching in the second draw gap.
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