Abstract:
PROBLEM TO BE SOLVED: To provide a liquid crystal display device containing a phase difference film and improved in front surface contrast, in particular, with less hue change resulting from an angle of field.SOLUTION: A manufacturing method for a phase difference film comprises: a first step in which cellulose acetate with an average acetyl group substitution degree of 2.2 to 2.5 and a hydrogen-bonded chemical compound having at least a carboxy group or hydroxy group as at least a substituent group in an aromatic ring are dissolved in an organic solvent containing 90% by mass of halogen organic solvent, thereby obtaining a dope solution; a second step in which the dope solution is caused to flow and extend over a metal belt; a third step in which a film object obtained by drying the dope solution caused to flow and extend is pulled off from the metal belt; a fourth step in which the film object pulled off is stretched; and a fifth step in which the stretched film object is heated and dried to volatilize the organic solvent in the film object. The average volatilization speed of the organic solvent of the film object right before the stretching of the film object is adjusted to the range of 1.5×10to 3.0×10g/(sec cm).
Abstract:
Disclosed herein is a thermoplastic cellulosic composition for preparing a cellulose-based masterbatch and/or a cellulose-based fiber with a networked structure. In one example, the thermoplastic cellulosic composition includes an esterified cellulose present in a range of about 80 wt% to about 95 wt%, polyethylene glycol present in a range of about 4.5 wt% to about 12 wt%, a tri-functional cross-linking agent present in a range of about 0.01 wt% to about 3 wt%, an initiator present in a range of about 0.01 wt% to about 0.15 wt%, and a dispersing agent present in a range of about 0.01 wt% to about 5 wt%.
Abstract:
PROBLEM TO BE SOLVED: To provide an optical film, thin but excellent in moisture permeability, improving moist heat resistance of a polarizing element when used for polarizing plate protection films, and, at the same time, excellent in mass change of the film after moist heat conditions and further excellent in front face contrast by suppressing disturbance of molecular orientation of an additive and cellulose even when extended to high magnification, and to provide a polarizing plate using the same.SOLUTION: There is provided an optical film in which a tanδ in film width direction has the following relation: 0.50≥tanδ/tanδ≥0.22, where the tanδmeans the maximum value of a tanδ value measured at 25-210°C, and the tanδmeans the value of tanδ measured at the temperature of -40°C when the tanδis expressed.
Abstract:
Highly cohesive composite materials, formed of at least one polymer and at least one compound selected from among the mineral oxides, silicoaluminates and activated carbon, have: a number median particle size of at least 150 μm; a pore volume (Vd1), constituted of pores of diameter ranging from 3.6 to 1000 nm, of at least 0.4 cm3/g; and a cohesion index CIN, equal to the ratio (number median particle size after an air pressure stress of 4 bar)/(number median particle size without air pressure stress (0 bar)), greater than 0.40. Such composite materials are useful, e.g., as liquid supports, catalyst supports, additives or for liquid or gas filtration, in particular in cigarette filters.
Abstract:
PROBLEM TO BE SOLVED: To provide a cellulose acylate film, which is laminated with an active energy ray curable layer and in which adhesiveness with the active energy ray curable layer is sufficiently maintained even when being irradiated with light for a long period of time.SOLUTION: The cellulose acylate film includes: cellulose acylate; 0.001 mass% or more and 5 mass% or less of a hindered amine compound with respect to the cellulose acylate; and a benzotriazole UV absorbent having a molecular weight of 400 or more and a melting point of 30°C or more without containing a halogen atom.
Abstract:
PROBLEM TO BE SOLVED: To provide a cellulose acylate film of which a light scattering efficiency (haze) is 0.3% or less when the film is stretched by 10 to 30% and is slightly increased by ±0.001 to 0.2% as compared with the haze before stretching.SOLUTION: The present invention relates to a cellulose acylate film containing an additive that is a liquid state at room temperature, has a melting point of -50 to 50°C, a boiling point of 300°C or higher, and its own refractive index of 1.4 to 1.6. The cellulose acylate film has a low haze.