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

Title:

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

Document Type and Number:

WIPO Patent Application WO/2014/115705

Kind Code:

A1

Abstract:

[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.

Inventors:

KIMURA HIDEAKI (JP)
SASAGAWA TAISUKE (JP)
AKAKI MASAYUKI (JP)
TAKANO TOSHIHIKO (JP)

Application Number:

PCT/JP2014/051066

Publication Date:

July 31, 2014

Filing Date:

January 21, 2014

Export Citation:

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Assignee:

MITSUBISHI GAS CHEMICAL CO (JP)
MGC FILSHEET CO LTD (JP)

International Classes:

G02B5/30; G02B5/20; G02C11/00

Domestic Patent References:

WO2011155550A1	2011-12-15
WO2011049108A1	2011-04-28

Foreign References:

JPH06242318A	1994-09-02
JP2008165200A	2008-07-17
JPH095683A	1997-01-10
JPH0339903A	1991-02-20
JPH0852817A	1996-02-27
JPH08313701A	1996-11-29
JPH06242318A	1994-09-02

Other References: