Polarizing film, optical film laminate including polarizing film, stretched laminate for use in production of optical film laminate including polarizing film, production methods for them, and organic EL display device having polarizing film

摘要

Provided is a continuous web of polarizing film for an organic EL display device which has a thickness of 10 µm or less and exhibits high optical characteristics. The polarizing film for an organic EL display device is made of a polyvinyl alcohol type resin having a molecularly oriented dichroic material, and formed through stretching to have a thickness of 10 µm or less and exhibit optical characteristics satisfying the following conditions: T ‰¥ 43; and P ‰¥ 99.5, wherein T is a single layer transmittance, and P is a polarization rate. The polarizing film for an organic EL display device may be prepared by subjecting a laminate comprising a non-crystallizable ester type thermoplastic resin substrate and the polyvinyl alcohol type resin layer formed on the substrate, to 2-stage stretching consisting of preliminary in-air stretching and in-boric-acid-solution stretching.