MULTILAYERED OPTICAL FILM, AND PREPARATION METHOD THEREOF
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United States of America Patent
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Aug 16, 2012
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Oct 8, 2010
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Oct 9, 2009
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A multilayered optical film has a structure in which a first resin layer comprising PEN and a second resin layer comprising PET copolymerized with heterocyclic polyvalent alcohol are alternatively laminated. The multilayered optical film has excellent optical characteristics because of having excellent heat resistance, showing excellent elongation in case of preparation, having low haze, and having a large difference in a refractive index between resin layers.
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