Polarizing film and process for the production of the same

Polarisierende Folie und Verfahren zur Herstellung derselben

Film polarisant et procédé pour sa fabrication

Abstract

A polarizing film comprising a uniaxially stretched film containing a polyvinyl alcohol having a degree of polymerization of at least about 2,500, and at least one polarizing agent selected from iodine and a dichroic dye, as well as a process for the production of the same. This polarizing film is superior in heat resistance and moist heat resistance to conventional films and has excellent optical properties, such as a high polarizing coefficient and transmittance.

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Patent Citations (5)

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    EP-0146084-A2June 26, 1985Toray Industries, Inc.Polyvinylalkoholfaser mit ultrahoher Festigkeit und Verfahren zur Herstellung derselben
    EP-0216407-A1April 01, 1987Stamicarbon B.V.Process for the preparation of polyvinyl alcohol articles of high strength and modulus
    GB-2055625-AMarch 11, 1981Shinetsu Chemical CoMethod for the preparation of polarizing films or sheets
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NO-Patent Citations (2)

    Title
    DATABASE WPIL, no. 81-50813D (28), Derwent Publications, London, GB; & JP-A-56 061 431 (NITTO ELECTRIC IND.)
    DATABASE WPIL, no. 87-159753 (23), Derwent Publications, London, GB; & JP-A-62 086 304 (SUMITOMO CHEM. IND.) 20-04-1987

Cited By (16)

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    EP-0564925-A3December 01, 1993Agfa Gevaert AgPolarizing film
    EP-0704723-A1April 03, 1996Agfa-Gevaert AGPolarising film
    GB-2329610-AMarch 31, 1999Secr DefenceA covert mark and security marking system
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    JP-H02253204-AOctober 12, 1990Nippon Synthetic Chem Ind Co Ltd:TheProduction of polarizing film having superior durability
    US-5087985-AFebruary 11, 1992Toray Industries, Inc.Polarizer for visible light
    US-5670092-ASeptember 23, 1997Agfa-Gevaert AktiengesellschaftPolarizing film
    US-6335051-B1January 01, 20023M Innovative Properties CompanyDichroic polarizing film and optical polarizer containing the film
    US-6337369-B1January 08, 2002Kuraray Co., Ltd.Polarizing film
    US-6347342-B1February 12, 2002Next Software, Inc.Method and apparatus for dynamically brokering object messages among object models
    US-6610356-B2August 26, 20033M Innovative Properties CompanyDichroic polarizing film and optical polarizer containing the film
    US-7484218-B2January 27, 2009Next Software, Inc.Method and apparatus for dynamically brokering object messages among object models
    US-8518474-B2August 27, 2013Sumitomo Chemical Company, LimitedMethod for producing iodine type polarizing film
    WO-2004053543-A1June 24, 2004Sumitomo Chemical Company, LimitedMethod for producing iodine type polarizing film
    WO-9801817-A1January 15, 1998The Secretary Of State For Defence In Her Britannic Majesty's Government Of The United Kingdom Of Great Britain And Northern IrelandA covert mark and security marking system