Optical film, polarizing plate, and image display device
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United States of America Patent
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Oct 29, 2019
Grant Date -
Nov 12, 2015
app pub date -
Jul 17, 2015
filing date -
Jan 18, 2013
priority date (Note) -
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status (Latency Note)
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Abstract
A film of 15 to 45 μm thick containing a cellulose acylate and an aromatic ester oligomer having a repeating unit derived from a dicarboxylic acid and a repeating unit derived from a diol, in which the repeating unit derived from a dicarboxylic acid has a ratio m/n of from 0/10 to 3/7, m and n represent a molar proportion of a repeating unit derived from an aliphatic dicarboxylic acid and an aromatic dicarboxylic acid, respectively, and the film satisfies |Rth(590)|≤50 nm; has a good appearance and is free of deterioration in display performance when the film with a thin thickness is produced in the form of a roll, achieves a high pencil hardness by imparting a high Knoop hardness to the film, even with a hard coat layer provided, and is free of display unevenness on installing the film in a liquid crystal display device.
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International Classification(s)
- C08J:WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTE....
- G02B:OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
- C08B:POLYSACCHARIDES; DERIVATIVES THEREOF
- G02F:DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF ....
- C08L:COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08K:USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUB....
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