Cellulose acylate film, polarizing plate, and liquid crystal display device
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United States of America Patent
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Mar 10, 2009
Grant Date -
Mar 22, 2007
app pub date -
Sep 20, 2006
filing date -
Sep 21, 2005
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Abstract
A cellulose acylate film comprising cellulose acylate which has a degree of crystallinity represented by the following expression (I) of 0.9 or more, and satisfies the following expressions (II) and (III): Degree of crystallinity=(X-ray diffraction intensity at 2.theta. of 13.degree.)/(X-ray diffraction intensity at 2.theta. of 12.degree.); Expression (I) 2.6.ltoreq.A+B.ltoreq.3.0; and Expression (II) 0.5.ltoreq.B.ltoreq.1.2 Expression (III) wherein A represents a substitution degree by an acetyl group of a hydroxyl group in a glucose unit of the cellulose acylate, and B represents a substitution degree by a substituent having from 3 to 4 carbon atoms of a hydroxyl group of a glucose unit of the cellulose acylate.
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