Polarizing Plate and Liquid Crystal Display Device
AssigneeFUJIFILM Corporation
InventorsShun NAKAMURA, Masayoshi TOYODA
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Abstract
A polarizing plate comprising a polarizer, and a cycloolefin polymer film having a surface bonded to at least one surface of the polarizer, the surface of the cycloolefin polymer film having a mean surface roughness Ra falling within the range from 10 nm to 200 nm, and a shrinkage ratio of the polarizer, after being allowed to stand in an atmosphere at 105° C. for 10 hours, being equal to or smaller than 20% in the direction of transmission axis thereof, is disclosed.
Claims10
A polarizing plate comprising a polarizer, and a cycloolefin polymer film having a surface bonded to at least one surface of the polarizer, the surface of the cycloolefin polymer film having a mean surface roughness Ra falling within the range from 10 nm to 200 nm, and a shrinkage ratio of the polarizer, after being allowed to stand in an atmosphere at 105° C. for 10 hours, being equal to or smaller than 20% in the direction of transmission axis thereof.
A process of producing a polarizing plate comprising:
- winding up extruded molten material using a casting roll having surface roughness, thereby forming a cycloolefin polymer film having a mean surface roughness Ra falling within the range from 10 nm to 200 nm, and
- bonding the surface of the cycloolefin polymer film and a surface of a polarizer using a polyvinyl alcohol-base additive.
A process of producing a polarizing plate comprising:
- winding up extruded molten material using a casting roll while pressing the wind-up film around the casting roll by a touch roll, having surface roughness, from the opposite side of the casting roll, thereby forming a cycloolefin polymer film having a mean surface roughness Ra falling within the range from 10 nm to 200 nm, and
- bonding the surface of the cycloolefin polymer film and a surface of a polarizer film using a polyvinyl alcohol-base additive.
Dependencies are inferred from the claim text.