Process for producing cellulose acylate film
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United States of America Patent
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Dec 30, 2008
Grant Date -
Sep 30, 2004
app pub date -
Jul 31, 2002
filing date -
Jul 31, 2001
priority date (Note) -
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Abstract
A cellulose acylate film is produced by using a cellulose acylate solution and forming a film consisting of two or more layers by the co-casting method. The cellulose acylate to be used is selected so that the association molecular weight of cellulose acylate due to the static light scattering in the solution forming the outer layer becomes smaller than the association molecular weight of cellulose acylate due to the static light scattering in the solution forming the inner layer.
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