Abstract:
A composition for melt casting film formation that excels in not only uniformity of retardation being an optical characteristic, especially uniformity of retardation in the direction of film width, but also contrast; and relevant thereto, an optical film, process for producing the optical film, polarization plate and liquid crystal display apparatus. Accordingly, there is provided a composition for melt casting film formation containing a cellulose ester in an amount of 50 mass % or more, characterized in that the free acid content of the composition is 50 ppm or less.
Abstract:
A novel composition is disclosed. The composition comprises, at least, a polymer material and inorganic fine particles having adsorbed thereto molecules having at least one adsorptive group to the inorganic fine particle and a group capable of forming a liquid crystal core. A film made of the composition is also disclosed.
Abstract:
A novel cellulose acylate film is disclosed. The film is formed of a composition comprising at least one cellulose acylate having an aromatic group-containing acyl group (Substituent A), in which a substitution degree with Substituent A satisfies following relational expressions (I) and (II): −0.25≦SA2+DSA3−DSA6≦0.20, (I) 0.35≦DSA2+DSA3+DSA6, (II) wherein DSA2, DSA3 and DSA6 each indicate a substitution degree with Substituent A at the 2-, 3- and 6-positions of the cellulose acylate.
Abstract:
A cellulose acylate film comprising a retardation developing agent consisting of a rodshaped compound, wherein Re is 50 to 100 nm, Rth is 130 to 250 nm, and the thickness is 40 to 90 μm. A liquid crystal display device comprising the film shows reduced the corner irregularity.
Abstract:
An optical film includes a cellulose acylate that has a weight-average molecular weight of 300,000 or more; and a compound that is capable of decreasing a retardation in a thickness-direction and has a weight-average molecular weight of 1,000 or more.
Abstract:
A method for producing a cellulose acylate film containing an additive comprising an aliphatic compound, the method contains a process of thermal shrinkage treatment at an atmospheric temperature higher than the glass transition temperature (Tg) in the state where at least one of the transverse direction and the machine direction of the film is free, and a cellulose acylate film obtained by the above method.
Abstract:
A cellulose acylate film that has: an in-plane retardation Re and a retardation Rth in a thickness direction at a wavelength of 590 nm, which are satisfied with ranges of expressions (I) to (III); a coefficient of a thermal expansion of from 20 ppm/° C. to 100 ppm/° C.; and a haze of from 0.01 to 0.8, and a polarizing plate and a display device using the same. 20≦Re≦50 Expression (I) 70≦Rth≦200 Expression (II) 1.0≦Rth/Re≦3.0 Expression (III) In the foregoing expressions, each of Re and Rth is a value at 25° C. and 60% RH, and has a unit of nm.
Abstract:
Disclosed is a cellulose ester film containing cellulose ester and microparticles having an average primary particle diameter of from 0.1 to 1.0 μm, wherein a relative standard deviation of a primary particle diameter of the microparticles is from 1 to 20%, and wherein the cellulose ester film has a surface with a peak density of from 1,000 to 8,000 (1/mm2).
Abstract translation:公开了含有平均一次粒径为0.1〜1.0μm的纤维素酯和微粒的纤维素酯膜,其中,微粒的一次粒径的相对标准偏差为1〜20%,其中,纤维素酯膜 具有峰值密度为1,000至8,000(1 / mm 2)的表面。
Abstract:
An optically-compensatory film comprising: a cyclic polyolefin film satisfying expression (I); and a cellulose acylate film satisfying expressions (II) and (III), or a liquid-crystal display device comprising at least one cyclic polyolefin film satisfying expression (I) and at least one cellulose acylate film satisfying expressions (II) and (III): 35≦Re(630)≦350 and 70≦Rth(630)≦400, (I) 0≦Re(630)≦10 and |Rth(630)|≦25, and (II) |Re(400)−Re(700)|≦10 and |Rth(400)−Rth(700)|≦35, (III) wherein Re(λ) represents an in-plane retardation value (unit:nm) at a wavelength of λ nm; and Rth(λ) represents a thickness-direction retardation value at a wavelength of λ nm.