Abstract: A reflective polarizing film for a liquid crystal display polarizer that has a high polarization performance and eliminates a hue shift at an oblique azimuth of 45°, a polarizer for a liquid crystal display composed of the same, an optical member for a liquid crystal display, and a liquid crystal display are provided. In a reflective polarizing film for a liquid crystal display polarizer composed of a uniaxially stretched multi-layer laminate film in which a first layer and a second layer are alternately laminated, the reflective polarizing film has a polarization degree of 99.5% or more and an amplitude of a transmittance waveform of 2.0% or less in a wavelength range of 450 to 650 nm measured with respect to the polarized light incident at an incident angle of 60° on an incident plane including an azimuth angle of 45°, among polarized light components parallel to the transmission axis.

Abstract: Provided are a biaxially stretched laminated polyester film and a laminated glass composed of the same. Specifically, the invention is achieved by a biaxially stretched laminated polyester film including 51 layers or more in total, in which a first layer and a second layer are alternately laminated, wherein a polyester (A) constituting the first layer is polyethylene-2,6-naphthalenedicarboxylate; a polyester (B) constituting the second layer is a polyester containing at least one of an ethylene terephthalate component and an ethylene naphthalene dicarboxylate component; an average reflectance within a wavelength range of 400 to 750 nm is not more than 25%; an average reflectance within a wavelength range of 800 to 1,200 nm is 50% or more; and a Young's modulus of the film at 90° C. is 2,400 MPa or more in at least one direction of the longitudinal direction and the lateral direction of the film.

Abstract: A flame-retardant biaxially oriented polyester film is obtained by imparting flame retardancy to a polyester film itself using a phosphorus flame retardant, a flame-retardant polyester film laminate is formed from the same, and a flexible circuit board is provided. The present invention is obtained from a flame-retardant biaxially oriented polyester film which contains, based on the weight of the polyester film, 70 to 99.5% by weight of polyethylene terephthalate or polyethylene naphthalate, and 0.5 to 30% by weight of flame retardant particles having an average particle diameter of 0.5 to 3.0 ?m and being represented by a specific phosphinate or diphosphinate, wherein the number of coarse particles having a maximum length of 10 ?m or more contained in the polyester film is 10/m2 or less.

Abstract: Provided is a uniaxially stretched multi-layer laminate film including a first layer and a second layer alternately laminated each other, wherein the first layer is a layer containing a polyester, the polyester containing an ethylene naphthalate unit in an amount of 50 mol % or more and 100 mol % or less on a basis of a repeating unit that constitutes the polyester, and a polymer that forms the second layer is a copolymer polyester containing, as copolymer components, a 2,6-naphthalenedicarboxylic acid component, an ethylene glycol component, and a trimethylene glycol component, (A) the content of an ethylene naphthalate unit in the polyester of the first layer being 80 mol % or more and 100 mol % or less on a basis of the repeating unit that constitutes the polyester, or (B) the polymer that forms the second layer being the copolymer polyester further containing, as a copolymer component, an alicyclic diol component.

Abstract: Provided is a uniaxially stretched multi-layer laminate film including a first layer and a second layer alternately laminated each other, wherein the first layer is a layer containing a polyester, the polyester containing an ethylene naphthalate unit in an amount of 50 mol % or more and 100 mol % or less on a basis of a repeating unit that constitutes the polyester, and a polymer that forms the second layer is a copolymer polyester containing, as copolymer components, a 2,6-naphthalenedicarboxylic acid component, an ethylene glycol component, and a trimethylene glycol component, (A) the content of an ethylene naphthalate unit in the polyester of the first layer being 80 mol % or more and 100 mol % or less on a basis of the repeating unit that constitutes the polyester, or (B) the polymer that forms the second layer being the copolymer polyester further containing, as a copolymer component, an alicyclic diol component.

Abstract: A reflective polarizing film for a liquid crystal display polarizer that has a high polarization performance and eliminates a hue shift at an oblique azimuth of 45°, a polarizer for a liquid crystal display composed of the same, an optical member for a liquid crystal display, and a liquid crystal display are provided. In a reflective polarizing film for a liquid crystal display polarizer composed of a uniaxially stretched multi-layer laminate film in which a first layer and a second layer are alternately laminated, the reflective polarizing film has a polarization degree of 99.5% or more and an amplitude of a transmittance waveform of 2.0% or less in a wavelength range of 450 to 650 nm measured with respect to the polarized light incident at an incident angle of 60° on an incident plane including an azimuth angle of 45°, among polarized light components parallel to the transmission axis.

Abstract: A uniaxially stretched multi-layer laminate film that exhibits a high polarization performance of 99.5% or more in a simpler configuration than before, a polarizing plate that is composed of the same, an optical member for a liquid crystal display device, and a liquid crystal display device are provided. Namely, in the uniaxially stretched multi-layer laminate film in which a first layer and a second layer are alternately laminated, the uniaxially stretched multi-layer laminate film includes an intermediate layer that has a thickness of 2 ?m or more and 30 ?m or less; the first layer is composed of a polyester containing a naphthalene dicarboxylic acid ester; the second layer is composed of a copolymer polyester and is an optically isotropic layer that has an average refractive index of 1.50 or more and 1.60 or less; the first layer, the second layer, both first and second layers, or the intermediate layer contains a visible light absorbent, which has a weight loss of less than 10% when it is kept at 300° C.

Abstract: A multilayered reflective polarizing film is provided that has high polarization performance comparable to that of an absorption-type polarizing plate, and is preferred as a polarizing plate attached to a liquid crystal cell. An optical member for liquid crystal display devices, and a liquid crystal display device formed from such a multilayered reflective polarizing film are also provided. Specifically, the reflective polarizing film includes a uniaxially stretched multilayered film in which a specific aromatic polyester containing (alkylenedioxy)di-2-naphthoic acid as a part of dicarboxylic acid components is used as a first layer, and an optically isotropic polyester having an average refractive index of 1.50 to 1.60 is used as a second layer, and that has a predetermined refractive index difference between the layers. The reflective polarizing film has an angle of orientation of 2 degrees or less.

Abstract: A flame-retardant biaxially oriented polyester film is obtained by imparting flame retardancy to a polyester film itself using a phosphorus flame retardant, a flame-retardant polyester film laminate is formed from the same, and a flexible circuit board is provided. The present invention is obtained from a flame-retardant biaxially oriented polyester film which contains, based on the weight of the polyester film, 70 to 99.5% by weight of polyethylene terephthalate or polyethylene naphthalate, and 0.5 to 30% by weight of flame retardant particles having an average particle diameter of 0.5 to 3.0 ?m and being represented by a specific phosphinate or diphosphinate, wherein the number of coarse particles having a maximum length of 10 ?m or more contained in the polyester film is 10/m2 or less.

Abstract: A uniaxially stretched multi-layer laminate film includes 251 or more layers in which a first layer and a second layer are alternately laminated, wherein the first layer is composed of a polyester containing a 2,6-naphthalene dicarboxylic acid component; the second layer is composed of a thermoplastic resin having an average refractive index of 1.60 or more and not more than 1.65 and having negative optical anisotropy or isotropy; an S polarization component has an average reflectance of 90% or more relative to the incident polarized light at an angle of incidence of 0 degree and 50 degrees, respectively; and a P polarization component has an average reflectance of not more than 15% relative to the incident polarized light at an angle of incidence of 0 degree and an average reflectance of 20% or more relative to the incident polarized light at an angle of incidence of 50 degrees.

Abstract: A uniaxially stretched multi-layer laminate film that exhibits a high polarization performance of 99.5% or more in a simpler configuration than before, a polarizing plate that is composed of the same, an optical member for a liquid crystal display device, and a liquid crystal display device are provided. Namely, in the uniaxially stretched multi-layer laminate film in which a first layer and a second layer are alternately laminated, the uniaxially stretched multi-layer laminate film includes an intermediate layer that has a thickness of 2 ?m or more and 30 ?m or less; the first layer is composed of a polyester containing a naphthalene dicarboxylic acid ester; the second layer is composed of a copolymer polyester and is an optically isotropic layer that has an average refractive index of 1.50 or more and 1.60 or less; the first layer, the second layer, both first and second layers, or the intermediate layer contains a visible light absorbent, which has a weight loss of less than 10% when it is kept at 300° C.

Abstract: Provided are a biaxially stretched laminated polyester film and a laminated glass composed of the same. Specifically, the invention is achieved by a biaxially stretched laminated polyester film including 51 layers or more in total, in which a first layer and a second layer are alternately laminated, wherein a polyester (A) constituting the first layer is polyethylene-2,6-naphthalenedicarboxylate; a polyester (B) constituting the second layer is a polyester containing at least one of an ethylene terephthalate component and an ethylene naphthalene dicarboxylate component; an average reflectance within a wavelength range of 400 to 750 nm is not more than 25%; an average reflectance within a wavelength range of 800 to 1,200 nm is 50% or more; and a Young's modulus of the film at 90° C. is 2,400 MPa or more in at least one direction of the longitudinal direction and the lateral direction of the film.

Abstract: A uniaxially stretched multi-layer laminate film includes 251 or more layers in which a first layer and a second layer are alternately laminated, wherein the first layer is composed of a polyester containing a 2,6-naphthalene dicarboxylic acid component; the second layer is composed of a thermoplastic resin having an average refractive index of 1.60 or more and not more than 1.65 and having negative optical anisotropy or isotropy; an S polarization component has an average reflectance of 90% or more relative to the incident polarized light at an angle of incidence of 0 degree and 50 degrees, respectively; and a P polarization component has an average reflectance of not more than 15% relative to the incident polarized light at an angle of incidence of 0 degree and an average reflectance of 20% or more relative to the incident polarized light at an angle of incidence of 50 degrees.

Abstract: A multilayered reflective polarizing film is provided that has high polarization performance comparable to that of an absorption-type polarizing plate, and is preferred as a polarizing plate attached to a liquid crystal cell. An optical member for liquid crystal display devices, and a liquid crystal display device formed from such a multilayered reflective polarizing film are also provided. Specifically, the reflective polarizing film includes a uniaxially stretched multilayered film in which a specific aromatic polyester containing (alkylenedioxy)di-2-naphthoic acid as a part of dicarboxylic acid components is used as a first layer, and an optically isotropic polyester having an average refractive index of 1.50 to 1.60 is used as a second layer, and that has a predetermined refractive index difference between the layers. The reflective polarizing film has an angle of orientation of 2 degrees or less.

Abstract: A multi-layer stretched film has 251 or more alternating layers which consist of first layers and second layers, wherein the first layers are made of a polyester which contains (i) 5 to 50 mol % of a naphthoic acid component as a dicarboxylic acid component and (ii) a diol having an alkylene group with 2 to 10 carbon atoms as a diol component; and the second layers are made of a thermoplastic resin having an average refractive index of 1.50 to 1.60 and differences in refractive index among a uniaxial stretching direction, a direction orthogonal to the uniaxial stretching direction and a film thickness direction of 0.05 or less before and after stretching, and the film has specific reflectance characteristics for a P polarization component and an S polarization component.

Abstract: Provided is an oriented laminated film, characterized in that the film is obtained by alternately laminating Layer A and Layer B such that reflection is generated by optical interference due to a difference in refractive indices of Layer A and Layer B, wherein Layer A includes an aromatic polyester containing trimethylene-2,6-naphthalenedicarboxylate as a main repeating unit and has a layer thickness in a range of 0.05 to 0.5 ?m and Layer B includes a polylactic acid composition and has a layer thickness in a range of 0.05 to 0.5 ?m, and a reflectivity curve thereof for light in a wavelength range of 400 to 1,600 nm has a reflection peak having a maximum reflectivity which is at least 20% higher than the reflectivity baseline. The present invention can provide a laminated film having high reflectivity with improved thickness variation associated with stretching treatment and improved hue irregularity attributable to a state of lamination.

Abstract: A stereocomplex polylactic acid resin composition containing an amide compound represented by the following general formula (1) and a film composed thereof. A stereocomplex polylactic acid excellent in transparency and a resin composition can be provided. (In the formula, R1 represents a residue obtainable by removing all carboxyl groups from 1,2,3-propane tricarboxylic acid or 1,2,3,4-butane tetracarboxylic acid; three or four R2 may be the same as or different from each other and each represents a hydrogen atom or a linear or branched chain alkyl group having 1 to 10 carbon atoms; and k represents an integer of 3 or 4.

Abstract: A laminated film obtained by carrying out anti-reflection processing on the surface of a reflection polarizing film. This laminated film comprising (A) a monoaxially oriented laminated film consisting of 501 or more alternating first layers made of a first thermoplastic resin having a positive stress optical coefficient and a thickness of 0.05 to 0.5 ?m and second layers made of a second thermoplastic resin different from the first thermoplastic resin and having a thickness of 0.05 to 0.5 ?m, and a low-reflectance layer formed on at least one side of the monoaxially oriented laminated film and having a reflectance of the surface measured from the input side of 3% or less.

Abstract: Provided is a film made of a composition obtained by mixing a compound at least having a ring structure containing one carbodiimide group, the first nitrogen and second nitrogen thereof being linked together through a linking group, with a polymer compound having an acidic group. A film which has improved hydrolysis resistance and from which no free isocyanate compounds are produced can be provided.

Abstract: A multi-layer stretched film has 251 or more alternating layers which consist of first layers and second layers, wherein the first layers are made of a polyester which contains (i) 5 to 50 mol % of a naphthoic acid component as a dicarboxylic acid component and (ii) a diol having an alkylene group with 2 to 10 carbon atoms as a diol component; and the second layers are made of a thermoplastic resin having an average refractive index of 1.50 to 1.60 and differences in refractive index among a uniaxial stretching direction, a direction orthogonal to the uniaxial stretching direction and a film thickness direction of 0.05 or less before and after stretching, and the film has specific reflectance characteristics for a P polarization component and an S polarization component.