Cellulose acylate film and method for producing same, and retardation film, polarizing plate and liquid crystal display device comprising the film
US7569261B2 · kind B2 · utility
9Cited by
3References
7Claims
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Key dates
| Filing date | May 17, 2007 |
| Grant date | Aug 4, 2009 |
| Priority date | — |
| Expiry date | May 17, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B5/3083
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A Cellulose acylate film, in which X-ray diffraction intensity satisfies following formulae and a half-value width of the peak at 2θ2 is greater than 3° and not greater than 7°:0.40≦Ic2/(Iam2+Ic2)≦0.75;Iam2I1+{(I3−I1)/(2θ3−2θ1)×(2θ2−2θ1)}; andIc2=I2−Iam2,wherein when it is assumed that θis the Bragg angle, 2θ1 and 2θ3 indicate 2θ at which the intensity becomes the minimum in the 2θ range of 4° to 5° and 14° to 16°, respectively, 2θ2 indicates 2θ at which the intensity becomes the maximum in the 2θ range of 5° to 10°, and I1, I2 and I3 indicate a diffractive intensity at 2θ1, 2θ2 and 2θ3, respectively.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.