Abstract: An object of the present invention is to provide a polarizer which is thin and light as well as has durability, and an optical member capable of forming a liquid-crystalline displaying apparatus for mobiles which is excellent in reliance. According to the present invention, there is provided a polarizer, which comprises a protecting film comprising an epoxy resin as a main component on at least one side of a polarizing film. This polarizer can be produced by a method of coating an uncured epoxy resin composition on at least one side of a polarizing film, and then curing the composition to form a protecting film. Also, an optical member comprising a laminate of the aforementioned polarizer and other optical layer exhibiting the optical function is provided and, further, a liquid crystal displaying apparatus comprising the optical member disposed on one side or both sides of a liquid-crystalline cell is provided.

Abstract: A method for producing a polarizing film comprising the step of dipping a polyvinyl alcohol film in/on which iodine is adsorbed and oriented in an aqueous solution containing boric acid wherein contact between the aqueous solution and oxygen is suppressed. The produced polarizing film has a high contrast.

Abstract: An object of the present invention is to provide a polarizer which is thin and light as well as has durability, and an optical member capable of forming a liquid-crystalline displaying apparatus for mobiles which is excellent in reliance. According to the present invention, there is provided a polarizer, which comprises a protecting film comprising an epoxy resin as a main component on at least one side of a polarizing film. This polarizer can be produced by a method of coating an uncured epoxy resin composition on at least one side of a polarizing film, and then curing the composition to form a protecting film. Also, an optical member comprising a laminate of the aforementioned polarizer and other optical layer exhibiting the optical function is provided and, further, a liquid crystal displaying apparatus comprising the optical member disposed on one side or both sides of a liquid-crystalline cell is provided.

Abstract: A method for producing a polarizing film comprising the step of dipping a polyvinyl alcohol film in/on which iodine is adsorbed and oriented in an aqueous solution containing boric acid wherein the aqueous solution has an absorbance of 0.13 or less at a wavelength of 450 nm. The produced polarizing film has a high contrast.

Abstract: A polarizing plate including a polarizing layer having a thickness of about 20 nm to about 1500 nm formed by rubbing at least one surface of a substrate, coating the rubbed surface of the substrate with an aqueous solution containing a dye having a tabular molecular shape, and drying the solution. This polarizing plate is a thinner polarizing plate with a high degree of polarization and suitably applicable to portable electronic equipment such as cellular phones, portable information terminals, smart cards and IC cards.

Abstract: Poly-azo compound selected from the group consisting compounds of the formula (I) and compounds of the formula (II), (wherein, Me represents copper, nickel, zinc or iron, A represents a naphthyl group having 1 to 3 sulfonic groups and further optionally having an alkyl group or alkoxy group, R1 and R2 represent each independently a hydrogen atom, alkyl group or alkoxy group, and R3 represents an amino group or hydroxyl group.).

Abstract: An iodine type polarizing plate is provided, the plate having a polyvinyl alcohol resin film in/on which iodine is adsorbed and oriented and a protective film adhered to at least one surface of the resin film with a transparent adhesive layer containing zinc in an amount of about 30 mg to about 90 mg per one square meter of the polarizing plate or in an amount of about 6% to about 18% by weight based on the weight of the adhesive layer.

Abstract: A method for producing a polarizing film comprising the step of dipping a polyvinyl alcohol film in/on which iodine is adsorbed and oriented in an aqueous solution containing boric acid wherein the aqueous solution has an absorbance of 0.13 or less at a wavelength of 450 nm. The produced polarizing film has a high contrast.

Abstract: The present invention provides a disazo compound of the formula (I) or a salt thereof wherein A represents 4-sulfophenyl or 6,8-disulfo-2-naphtyl, one of R1 and R2 represents hydrogen or methyl. The present invention also provides a dye-based polarizing film comprising a base material and the disazo compound of the formula (I) or the salt thereof contained in the base material. The disazo compound of the present invention provides a polarizing film, which is excellent in light resistance and initial polarizing performance, particularly light resistance when used as a polarizing element.

Abstract: A method for producing a polarizing film comprising the step of dipping a polyvinyl alcohol film in/on which iodine is adsorbed and oriented in an aqueous solution containing boric acid wherein contact between the aqueous solution and oxygen is suppressed. The produced polarizing film has a high contrast.

Abstract: An object of the present invention is to provide a high-performance polarized light separating element having stable structure and superior durability, whose product with a large area can easily be manufactured. There is provided a polarized light separating element comprising a plurality of thin metallic wires 21, 21 embedded and arrayed in a planar substrate 10 so as to be parallel to each other, wherein the pitch (P) of the wires 21, 21 is 100 to 300 nm, the ratio (D/P) of the width (D) of the wires 21, 21 to the pitch (P) of the wires is 0.1 to 0.6, and the height (H) of the wires 21, 21 in a cross section orthogonal to a lengthwise direction of the wires is 50 to 500 nm. With regard to the wires 21, 21, a surface thereof may be covered with a metallic oxide film. The substrate 10 is preferably a polymeric resin film.

Abstract: [1] A polarizing plate comprising a dye and a hindered amine-based compound. [2] The polarizing plate according to [1], wherein the polarizing plate comprises a dye-based polarizing film and a protective film pasted via an adhesive for polarizing plate containing a hindered amine-based compound and at least one adhesive component selected from the group consisting of an adhesive component containing a polyvinyl alcohol having a molecular weight of 20,000 to 200,000 as an active ingredient, an adhesive component containing an acrylic resin as an active ingredient and an adhesive component containing a urethane resin as an active ingredient.

Abstract: A polarizing plate which has a polarizing layer having a thickness of about 20 nm to about 1500 nm formed by rubbing at least one surface of a substrate, coating the rubbed surface of the substrate with an aqueous solution containing a dye having a tabular molecular shape, and drying the solution. This polarizing plate is a thinner polarizing plate with a high degree of polarization and suitably applicable to portable electronic equipment such as cellular phones, portable information terminals, smart cards and IC cards.

Abstract: Poly-azo compound selected from the group consisting compounds of the formula (I) and compounds of the formula (II), (wherein, Me represents copper, nickel, zinc or iron, A represents a naphthyl group having 1 to 3 sulfonic groups and further optionally having an alkyl group or alkoxy group, R1 and R2 represent each independently a hydrogen atom, alkyl group or alkoxy group, and R3 represents an amino group or hydroxyl group.).

Abstract: An object of the present invention is to provide an iodine type polarizing film of a polyvinyl alcohol film showing improved durability, and a method of producing the polarizing film. There is provided an iodine type polarizing film of a polyvinyl alcohol film in/on which iodine is adsorbed and oriented, wherein the polyvinyl alcohol film contains a saponin. This polarizing film can be produced by a method of producing a polarizing film comprising uniaxially stretching a polyvinyl alcohol film, dyeing the polyvinyl alcohol film in an aqueous solution containing iodine, impregnating the polyvinyl alcohol film after dyeing in an aqueous solution containing boric acid, and washing with water after the impregnation in an aqueous solution containing boric acid, wherein a saponin is dissolved and contained in the aqueous solutions of the above-mentioned iodine dyeing or later steps.

Abstract: There is provided a polarizing film of a polyvinyl alcohol film in/on which dichroic dye is adsorbed and oriented, wherein a hue angle H is in a range of 105° to 150°, and a chroma C* is 7 or smaller, providing that a parallel hue is expressed on a chromaticity coordinate of (a*, b*). There is also provided a polarizer comprising a film having the optical compensating function and a polyvinyl alcohol film in/on which dichroic dye is absorbed and oriented, wherein a hue angle H is in a range of 105° to 150°, and a chroma C* is 9 or smaller providing that a parallel hue thereof is expressed on a chromaticity coordinate of (a*, b*).

Abstract: An object of the present invention is to provide a polarizer which is thin and light as well as has durability, and an optical member capable of forming a liquid-crystalline displaying apparatus for mobiles which is excellent in reliance. According to the present invention, there is provided a polarizer, which comprises a protecting film comprising an epoxy resin as a main component on at least one side of a polarizing film. This polarizer can be produced by a method of coating an uncured epoxy resin composition on at least one side of a polarizing film, and then curing the composition to form a protecting film. Also, an optical member comprising a laminate of the aforementioned polarizer and other optical layer exhibiting the optical function is provided and, further, a liquid crystal displaying apparatus comprising the optical member disposed on one side or both sides of a liquid-crystalline cell is provided.

Abstract: The present invention provides a polarizing plate comprising a polarizing layer having a thickness of about 20 nm to about 1500 nm formed by rubbing at least one surface of a substrate, coating the rubbed surface of the substrate with an aqueous solution containing a dye having a tabular molecular shape, and drying the solution. This polarizing plate is a thinner polarizing plate with a high degree of polarization and suitably applicable to portable electronic equipment such as cellular phones, portable information terminals, smart cards and IC cards.

Abstract: The present invention provides a disazo compound of the formula (I) or a salt thereof 1

Abstract: A polyazo compound or salt thereof covering the region of from 500 to 580 nm and manifesting high initial polarization ability and represented by the following formulae (I) or (II): wherein, A represents a phenyl having sulfo and/or carboxyl and optionally having a lower alkyl or lower alkoxy, or a naphthyl having 1 to 3 sulfos, R1 to R6 represent hydrogen, lower alkyl or alkoxy, m and n each independently represent 0 or 1, R7 represents hydrogen or sulfo, D and E each independently represents —NHCO— or —N═N—, G represents —CH2—, alkylene having 2-4 carbon atoms, phenylene or —CH═CH—, and R8 represents sulfo, carboxyl or lower alkoxycarbonyl; is provided.