Abstract: Provided is a method for producing a separator for nonaqueous electrolyte electricity storage devices that includes a porous epoxy resin membrane, the method including: a step (i) of preparing an epoxy resin composition containing an epoxy resin, a curing agent, and a porogen; a step (ii) of cutting a cured product of the epoxy resin composition into a sheet shape or curing a sheet-shaped formed body of the epoxy resin composition so as to obtain an epoxy resin sheet; a step (iii) of removing the porogen from the epoxy resin sheet using a halogen-free solvent so as to form a porous epoxy resin membrane; a step (iv) of irradiating the porous epoxy resin membrane with infrared ray so as to measure infrared absorption characteristics of the porous epoxy resin membrane; and a step (v) of calculating a membrane thickness and/or an average pore diameter of the porous epoxy resin membrane based on the infrared absorption characteristics.

Abstract: The present invention provides a method for producing a separator for nonaqueous electrolyte electricity storage devices. The method allows: avoidance of use of a solvent that places a large load on the environment; relatively easy control of parameters such as the porosity and the pore diameter; and a high electrochemical stability of a resultant separator for nonaqueous electrolyte electricity storage devices. The present invention relates to a method for producing a separator for nonaqueous electrolyte electricity storage devices that has a thickness ranging from 5 to 50 ?m.

Abstract: The present invention provides a method for producing a porous membrane. The method allows: avoidance of use of a solvent that places a large load on the environment; relatively easy control of parameters such as the porosity and the pore diameter; and high chemical stability of a resultant porous membrane. The method for producing a porous membrane of the present invention includes the steps of: preparing an epoxy resin composition containing an epoxy resin, a curing agent represented by H2N—(CH2)n—NH2 where n is an integer from 4 to 8, and a porogen; forming a cured product of the epoxy resin composition into a sheet shape or curing a sheet-shaped formed body of the epoxy resin composition, so as to obtain an epoxy resin sheet; and removing the porogen from the epoxy resin sheet by means of a halogen-free solvent.

Abstract: The present invention provides a method for controlling an optical property of a wavelength conversion sheet. The method is a method for controlling an optical property of a wavelength conversion sheet that contains a transparent resin and a phosphor and achieves wavelength conversion by absorbing light in a specific wavelength range other than a target wavelength range and emitting light in a target wavelength range, wherein the phosphor contains a phosphor having a perylene skeleton, and a stokes shift of the wavelength conversion sheet is controlled by adjusting a concentration of the phosphor having a perylene skeleton to the transparent resin in a range of 0.5% to 3.5% by weight.

Abstract: A modified polymer which can serve as a raw material of novel reverse dispersion retardation films is provided, the modified polymer having no need to select a plurality of monomers or polymers in order to realize a reverse dispersion and having no problems concerning glass transition temperature or the like in drawing treatment. A polymer having a polyol skeleton as its main chain is caused to react with a compound for modification such as an aromatic carboxylic acid hydride. Through this reaction, a modified polymer in which a chemical group such as an aromatic carbonyl group is bonded to an oxygen atom in a side chain of the polyol skeleton is prepared. For example, polyvinyl alcohols and benzoyl chloride can be used as the polymer and the compound for modification, respectively. The chemical group may be a benzoyl group. When this modified polymer is formed into a film and then subjected to drawing treatment, a retardation film which exhibits a reverse wavelength dispersion characteristic can be obtained.

Abstract: A color correction filter with excellent durability is provided that can remove intermediate colors of light while preventing brightness of an image display from deteriorating and thereby can improve color tone representation of the image display. A color correction filter 10 of the present invention includes a color correction layer 11 and two protective layers 12. The color correction layer 11 contains a J aggregate of a dye. The dye is at least one dye selected from the group consisting of cyanine, merocyanine, squarylium, and porphyrin. The half bandwidth at a maximum absorption peak of the color correction layer is in the range of 5 to 30 nm. The two protective layers 12 are formed on both surfaces of the color correction layer 11, respectively.

Abstract: A crosslinked product with excellent durability is provided that can remove intermediate colors of light while preventing brightness from deteriorating and thereby can improve color tone representation. The crosslinked product of the present invention includes a J aggregate of a dye and is characterized in that the dye is at least one dye selected from the group consisting of cyanine, merocyanine, squarylium, and porphyrin, the J aggregate of the dye is formed in a matrix resin, and the matrix resin has been crosslinked.

Abstract: There is provided a retardation film including a stretched film of a polymer film having an absolute value of photoelastic coefficient (m2/N) of 50×10?12 or less measured by using light of a wavelength of 550 nm at 23° C., which satisfies the following expressions (1) and (2): Re[450]<Re[550]<Re[650]??(1) Rth[550]<Re[550]??(2). In the expressions (1) and (2): Re[450], Re[550], and Re[650] respectively represent in-plane retardation values measured by using light of wavelengths of 450 nm, 550 nm, and 650 nm at 23° C.; and Rth[550] represents a thickness direction retardation value measured by using light of a wavelength of 550 nm at 23° C.

Abstract: A retardation film according to the present invention consists of a single-layer film in which a birefringent chain polymer is oriented, the polymer having as a repeating unit (A), a structure represented by the following general formula (V): wherein R3 represents a hydrogen atom or an alkyl group having 1 to 8 carbon atoms; R4 and R8 each independently represent a hydrogen atom, a linear or branched alkyl group having 1 to 4 carbon atoms, a linear or branched alkoxyl group having 1 to 4 carbon atoms, a linear or branched thioalkoxyl group having 1 to 4 carbon atoms, halogen, a nitro group, an amino group, a hydroxyl group, or a thiol group (where R4 and R8 are not simultaneously hydrogen atoms); and R5, R6, and R7 each independently represent a hydrogen atom or a substituent.

Abstract: The present invention provides a highly practicable color purity improving sheet that while preventing unevenness in color and brightness from occurring, allows light with an improved color purity to be used for an image display efficiently and can improve color reproducibility of the image display. The color purity improving sheet includes a light-emitting layer which improves the purity of a color in a target wavelength range by absorbing light in a specific wavelength range other than the target wavelength range and converts the absorbed light to emitted light in the target wavelength range. The surface of the light-emitting layer on at least the light outgoing side is roughened so as to have an arithmetic average surface roughness Ra defined in JIS B 0601 (1994 version) in the range of 0.1 to 100 ?m.

Abstract: A retardation film comprising a monolayer film having a birefringent chain polymer orientated. The polymer has a repeating unit of the structure of the general formula: (V) wherein R3 is a hydrogen atom or C1-C8 alkyl; each of R4 and R8 independently is a hydrogen atom, C1-C4 linear or branched alkyl, C1-C4 linear or branched alkoxyl, C1-C4 linear or branched thioalkoxyl, halogen, nitro, amino, hydroxyl or thiol (with the proviso that R4 and R8 are not simultaneously hydrogen atoms); and each of R5, R6 and R7 independently is a hydrogen atom or a substituent. This retardation film can be a relatively thin layer, and exhibits such a wavelength dispersion that with respect to light rays of wavelength ? of approximately the entire visible region, the phase contrast is about ?/2 or about ?/4.

Abstract: An optical apparatus that prevents unevenness in color and brightness from occurring in an image display, and can improve the color purity of transmitted light and color reproducibility of the image display and is excellent in practical use. An optical apparatus that includes a light source device; a reflective layer; a color purity improving sheet; and a reflective polarizer. The color purity improving sheet includes a light-emitting layer which improves purity of a color in a target wavelength range by absorbing light in a specific wavelength range other than the target wavelength range and converts the absorbed light to emitted light in the target wavelength range. Light emitted from the light source device exits through the reflective polarizer to the outside. The color purity improving sheet is disposed between the reflective polarizer and the reflective layer. The light source device is disposed in a location between the color purity improving sheet and the reflective layer.

Abstract: A color purity improving sheet that improves color purity while preventing brightness from degrading due to absorption of light of a necessary color. The color purity improving sheet includes a light-emitting layer containing a light-emitting means for absorbing light in a specific wavelength range other than the target wavelength range and converting its wavelength to emit light in the target wavelength range, and a reflective layer. The light-emitting layer has a transmittance of at least 70% at the maximum absorption wavelength of the light-emitting layer. The light-emitting layer and the reflective layer are laminated together in this order in a direction from which light of a backlight is incident. The reflective layer selectively reflects part of light in the specific wavelength range other than the target wavelength range and has been transmitted without being absorbed by the light-emitting means in the light-emitting layer, allowing entrance into the light-emitting layer again.

Abstract: A modified polymer which can serve as a raw material of novel reverse dispersion retardation films is provided, the modified polymer having no need to select a plurality of monomers or polymers in order to realize a reverse dispersion and having no problems concerning glass transition temperature or the like in drawing treatment. A polymer having a polyol skeleton as its main chain is caused to react with a compound for modification such as an aromatic carboxylic acid hydride. Through this reaction, a modified polymer in which a chemical group such as an aromatic carbonyl group is bonded to an oxygen atom in a side chain of the polyol skeleton is prepared. For example, polyvinyl alcohols and benzoyl chloride can be used as the polymer and the compound for modification, respectively. The chemical group may be a benzoyl group. When this modified polymer is formed into a film and then subjected to drawing treatment, a retardation film which exhibits a reverse wavelength dispersion characteristic can be obtained.

Abstract: An elliptically polarizing plate comprising a retardation film having a film comprising a polymer which has, as its main chain, a polyol skeleton having a side chain substituted with at least one chemical group selected from the group consisting of an aromatic carbonyl group, an aryl-substituted lower alkylcarbonyl group, and an unsaturated aliphatic carbonyl group, the chemical group being bonded to an oxygen atom in the polyol skeleton side chain, and a polarizer stacked over the retardation film, wherein the polarizer is made of a coating film obtained by applying a dichromatic colorant. As the dichromatic colorant, an organic colorant represented by (chromogen)(SO3M)n wherein M represents a cation is used. The elliptically polarizing plate has a good visibility in the range of visible rays and can be made thin and light.

Abstract: There is provided a retardation film including a stretched film of a polymer film having an absolute value of photoelastic coefficient (m2/N) of 50×10?12 or less measured by using light of a wavelength of 550 nm at 23° C., which satisfies the following expressions (1) and (2): Re[450]<Re[550]<Re[650]??(1) Rth[550]<Re[550]??(2). In the expressions (1) and (2): Re[450], Re[550], and Re[650] respectively represent in-plane retardation values measured by using light of wavelengths of 450 nm, 550 nm, and 650 nm at 23° C.; and Rth[550] represents a thickness direction retardation value measured by using light of a wavelength of 550 nm at 23° C.

Abstract: A polyimide film having a biaxial optical anisotropy and excellent durability is provided. A solution of polyimide having an imidization ratio of 98% to 100% is applied onto a plastic base, and then the solution is dried, thus forming a polyimide coating. Subsequently, the polyimide coating is stretched together with the plastic base so as to satisfy nx>ny>nz, wherein nx and ny indicate a refractive index in a direction exhibiting a maximum refractive index within a plane and that in a direction perpendicular thereto and nz indicates a refractive index in a thickness direction.

Abstract: An optical film containing polyaryletherketone and a method of producing the optical film, the optical film being excellent in the heat resistance and uniformity, and the film having a negative birefringence. The optical film compensates birefringence of a liquid crystal display, thereby providing an optical element or an image display device that has desired color tones and viewing-angle characteristics. The optical film having a negative birefringence of 0.001 to 0.6 is produced by coating a solution containing polyaryletherketone on a substrate and subsequently drying the coating.

Abstract: An optical film containing polyaryletherketone and a method of producing the optical film, the optical film being excellent in the heat resistance and uniformity, and the film having a negative birefringence. The optical film compensates birefringence of a liquid crystal display, thereby providing an optical element or an image display device that has desired color tones and viewing-angle characteristics. The optical film having a negative birefringence of 0.001 to 0.6 is produced by coating a solution containing polyaryletherketone on a substrate and subsequently drying the coating.

Abstract: An aromatic polycarbodiimide comprising a structural unit represented by the following formula (I): where R is an organic group having 3 or more carbon atoms, and n is an integer of 2 to 300, and a polycarbodiimide solution, a polycarbodiimide sheet, and an insulated coated electric wire which are prepared using the aromatic polycarbodiimide. The aromatic polycarbodiimide has high solubility in an organic solvent, satisfactory workability, and excellent heat resistance and humidity resistance. The insulated coated electric wire has excellent durability and is highly reliable under high pressure, high humidity conditions.