COLORED LOW-POLARIZATION FILM, COLORED LOW-POLARIZATION SHEET, LENS AND METHOD FOR MANUFACTURING SAME

摘要

[Problem] To provide a colored low-polarization film, a method for manufacturing the film, a low-polarization sheet comprising the film, and a polarization lens formed by molding the sheet, the colored low-polarization film having a colortone or transmittance that does not change significantly in a processing step and having a colortone that can be more freely selected. [Solution] A polarization film formed of a polyvinyl alcohol resin film that has been swollen with water, uniaxially stretched, dyed with a dichroic dye and dried; a polarization sheet obtained by attaching aromatic polycarbonate sheets on both surfaces of the polarization film interposed by adhesion layers, and either a curved polarization lens obtained by curving the polarization sheet into a spherical surface or a non-spherical surface or an injection-molded polarization lens obtained by curving the polarization sheet into a spherical surface or a non-spherical surface and injection-molding an aromatic polycarbonate on the recess surface of the spherical or non-spherical surface, wherein the low-polarization film, which is colored to a desired color, is characterized in having a polarization degree of 45 to 90% and in being obtained using a dichroic organic dye composition and a coloration organic dye composition. The dichroic organic dye composition is made of a combination of dichroic organic dyes used as the dichroic organic dye for manufacturing the polarization film and having a dichroic ratio of 13 or higher, the dichroic organic dye composition being used in an amount that keeps the polarization degree in a range of 30% to less than 90%. The coloration organic dye composition is made of a combination of dyes having an extremely low dichroic ratio of 4 or less or substantially having no dichroic ratio, and is used in an amount yielding a desired dyed color.