Optical laminate film and method for producing same

Details Optical laminate film and method for producing same Optical laminate film and method for producing same

2004-08-18

2009-12-29

Kruer, Kevin R. (Department: 1794)

Stock material or miscellaneous articles

Composite

Of addition polymer from unsaturated monomers

C428S519000, C428S520000, C428S521000, C428S522000, C428S523000

Reexamination Certificate

active

07638205

ABSTRACT:
An optical laminate film comprising a layer (A) comprising a material having a negative intrinsic birefringence value as a primary component; and a layer (B) comprising a transparent resin as a primary component which is laminated to at least one side of the layer (A). The optical laminate film satisfies the following conditions:(a) nz>(nx+ny)/2(b) 0≦ dispersion of retardation Re≦+10 nm,wherein retardation Re is represented by the formula [|nx−ny|×D] where D represents thickness (μm) of the laminated film, nzrepresents a refractive index in the thickness direction, and nxand nyeach represent a refractive index, respectively in two directions orthogonal to each other and both of which are perpendicular to the thickness direction, all of the refractive indices being measured using light with wavelength of 550 nm.

REFERENCES:
patent: 7046443 (2006-05-01), Miyatake
patent: 2002/0060762 (2002-05-01), Arakawa
patent: 2006/0078692 (2006-04-01), Murakami et al.
patent: 2003-090912 (2003-03-01), None
patent: 03/107048 (2003-12-01), None
Matterial Letters, “Thermal dynamic mechanical and rheological properties of metallocene-catalyzed cycloolefin copolymers with hihg glass transition termperature” Lui ( vol. 61, Issue 2, Jan. 2007) pp. 457-462.

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