CELLULOSE ESTER FILM, LAYERED PRODUCT, POLARIZING PLATE AND LIQUID CRYSTAL DISPLAY DEVICE
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United States of America Patent
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Issued Date -
Mar 14, 2013
app pub date -
Sep 12, 2012
filing date -
Sep 13, 2011
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Abandoned
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Abstract
A cellulose ester film has: a ratio of a sound velocity in a width direction to a sound velocity in a longitudinal direction of from 0.9 to 1.1; a moist heat dimensional change rate in the width direction of from −0.2% to 0.2%, the moist heat dimensional change being one after the cellulose ester film is left standing at 60° C. and 90% RH for 24 hours; and a humidity dimensional change rate in the width direction of 0.38% or less.
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