Production method for transparent polymer film and transparent polymer film produced according to the method, retardation film, polarizer, and liquid crystal display device
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United States of America Patent
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May 7, 2013
Grant Date -
Apr 9, 2009
app pub date -
Feb 21, 2007
filing date -
Feb 21, 2007
priority date (Note) -
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Abstract
Retardation expressibility of a transparent polymer film can be easily controlled by heat treatment of the film at a temperature T (unit, ° C.) satisfying a condition of the following formula (1):
wherein Tc represents the crystallization temperature (unit, ° C.) of the film before the heat treatment; and Tm0 represents the melting point (unit, ° C.) of the film before the heat treatment.
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