Patent application number | Description | Published |
20090023911 | CELLULOSE ACYLATE FILM, POLARIZING PLATE, OPTICAL COMPENSATION FILM, AND LIQUID CRYSTAL DISPLAY DEVICE USING THE SAME - A cellulose acylate film characterized in that it has a shear rate dependency of melt viscosity of 0.1 to 2 and/or a temperature dependency of melt viscosity of 0.1 to 3. The cellulose acylate film is capable of suppressing generation of cutting wastage at the time of cutting. | 01-22-2009 |
20090036667 | CELLULOSE ACYLATE FILM AND METHOD FOR PRODUCING SAME, POLARIZING PLATE, RETARDATION FILM, OPTICAL COMPENSATORY FILM, ANTI-REFLECTION FILM, AND LIQUID CRYSTAL DISPLAY DEVICE - A cellulose acylate film is stretched in the longitudinal direction by 1-300% under such conditions that the ration of the stretching distance (L) to the width (W) of the film before stretching, i.e., length/width ratio (L/W), is higher than 0.01 and lower than 0.3. The film stretched is relaxed in the longitudinal direction by 1-50% to produce a cellulose acylate film. When this film is incorporated in a liquid-crystal display, it can prevent the occurrence of color unevenness even when used in an high-temperature high-humidity atmosphere. | 02-05-2009 |
20090130382 | METHOD FOR PRODUCING THERMOPLASTIC FILM - According to the present invention, the film is cooled little by little by controlling the surface temperature of the cooling drums so that the surface temperature of the cooling drums downstream is lower than that of the cooling drums upstream, whereby it is prevented from slipping and shrinking on the surface of the cooling drums. Thus, defects can be prevented from occurring in the film, whereby a high-quality thermoplastic film for optical applications can be produced. | 05-21-2009 |
20090176037 | Thermoplastic film and method of producing the same - A method of producing a thermoplastic film, which can increase uniformity of Re and Rth of a thermoplastic film obtained by stretching, and which can provide a thermoplastic film having few display irregularities when the film is incorporated into a liquid crystal display device as a retardation film, and a thermoplastic film produced by the method are provided. In a tenter, both ends in the width direction of the film are held with clips and the film is simultaneously stretched in the traveling direction A and the width direction B. By this, a thermoplastic film in which the number of adhesion marks is 10 marks/m2 or less, the in-plane retardation Re is 0 nm to 500 nm and the retardation Rth in the thickness direction is 30 nm to 500 nm is produced. | 07-09-2009 |
20090187000 | METHOD FOR PRODUCING CELLULOSE ACYLATE RESIN FILM - A cellulose acylate resin film which can suppress generation of color nonuniformity even after exposure to high temperature and high humidity when incorporated in a liquid crystal display element can be produced. The cellulose acylate resin film is heat-treated at a temperature of Tg−30° C. to Tg+20° C., Tg representing the glass transition temperature of the cellulose acylate resin, for 10 seconds to 600 seconds while conveying the cellulose acylate resin film at a tension of 2 N/cm | 07-23-2009 |
20090233008 | CELLULOSE ACYLATE GRAINS AND METHOD FOR PRODUCING THEM, CELLULOSE ACYLATE FILM AND METHOD FOR PRODUCING IT, POLARIZER, OPTICAL COMPENSATORY FILM, ANTIREFLECTION FILM AND LIQUID-CRYSTAL DISPLAY DEVICE - Cellulose acylate grains having a heat quantity of crystalline fusion of at most 10 J/g. A film prepared by melt-casting the grains is free from the problem of yellowing when built in liquid-crystal display devices. | 09-17-2009 |
20100032866 | METHOD FOR PRODUCING THERMOPLASTIC RESIN FILM - There is provided a method for producing a thermoplastic resin film that can suppress the occurrence of color nonuniformity in the produced thermoplastic resin film even when the film is incorporated into liquid crystal display devices and exposed to high temperature and high humidity over time. Heat treatment is conducted for the thermoplastic resin film at a temperature of Tg−30° C. or higher and Tg+20° C. or lower, Tg representing the glass transition temperature of the thermoplastic resin, for 10 seconds to 600 seconds while conveying the thermoplastic resin film at a tension of 2 N/cm | 02-11-2010 |
20100164135 | METHOD FOR PRODUCING THERMOPLASTIC FILM - There is provided a method for producing a thermoplastic film that has a small distribution of retardation and excels in optical properties. In the method for producing a thermoplastic film by after extruding a molten resin from a die into a sheet, and cooling and solidifying the extruded sheet on a rotating cooling drum, peeling the cellulose acylate film off the cooling drum, and taking off the film with a take-off roller, the tension of the cellulose acylate film at the take-off roller is set to 0.02 kgf/mm | 07-01-2010 |
20110052837 | THERMOPLASTIC FILM, METHOD FOR PRODUCING SAME, POLARIZER AND LIQUID CRYSTAL DISPLAY DEVICE - A thermoplastic film having at least two thermoplastic resin layers laminated on each other, wherein at least the thermoplastic resin layer of the film surface and the thermoplastic resin layer of the film back each have a tilt structure in the thickness direction of the film, and in the plane including the tilt direction of the tilt structure and the film normal line, the sign of the angle, φ between the normal direction of the film surface and the tilt direction differs between the thermoplastic resin layer of the film surface and the thermoplastic resin layer of the film back, and wherein φ is from −90° to 90°. | 03-03-2011 |
20110063544 | OPTICAL FILM AND METHOD FOR PRODUCING IT, POLARIZER, AND LIQUID CRYSTAL DISPLAY DEVICE - An optical film comprising a thermoplastic resin and having a tilt direction, which is such that, when a sliced section of the optical film having both a tilt direction and the thickness direction of the film in the sliced plane thereof is placed between two polarizers set in a crossed Nicols configuration, and the two crossed Nicols polarizers are rotated from 0° to 90° while irradiated with light in the direction perpendicular to the polarizer plane, and when the sliced section is analyzed sequentially from one end to the other end in the thickness direction, then all the detected extinction positions are from more than 0° to less than 90° and the birefringence varies in the thickness direction. | 03-17-2011 |
20110214720 | POLYESTER FILM, METHOD FOR MANUFACTURING THE SAME, AND SOLAR CELL MODULE - A polyester film including terminal carboxylic groups in an amount of from 2 eq/t to 23 eq/t, wherein an amount of carboxylic groups on a surface of the film is from 0.005 eq/m | 09-08-2011 |
20130269775 | POLYESTER FILM, METHOD FOR PRODUCING THE SAME, BACK SHEET FOR SOLAR CELL, AND SOLAR CELL MODULE - A method for producing a polyester film includes: an unstretched film formation step of forming an unstretched polyester film having a thickness of from 2.5 mm to 5.0 mm by melt-extruding a polyester resin using an extruder, and cooling the polyester resin; and a stretching step of stretching the formed unstretched polyester film in at least one direction after heating the formed unstretched polyester film so as to have a mean temperature T1 (° C.), a surface temperature, and a central temperature. The mean temperature T1 (° C.) satisfies a relationship represented by formula (1): Tg−20° C.10-17-2013 | |
20130323502 | METHOD OF PRODUCING POLYESTER FILM, POLYESTER FILM, AND BACK SHEET FOR SOLAR CELL - A method of manufacturing a polyester film, including: preparing a polyester film substrate having an amount of a terminal carboxylic acid group (AV) of from 3 eq/ton to 20 eq/ton, by using a polyester resin having a temperature distribution of a pre-melting peak (Tm′) of from 1° C. to 10° C.; providing a coating layer on at least one surface of the polyester film substrate; and stretching the polyester film substrate provided with the coating layer at least once. | 12-05-2013 |