光学フィルムとその製造方法、並びにこれを用いた反射型偏光板及び輝度向上フィルム

Title:

光学フィルムとその製造方法、並びにこれを用いた反射型偏光板及び輝度向上フィルム

Document Type and Number:

Japanese Patent JP5612410

Kind Code:

B2

Abstract:

PROBLEM TO BE SOLVED: To provide an optical film having excellent brightness performance (light intensity).SOLUTION: The optical film has a sea-island structure including a dispersed phase (I) and a continuous phase (II) and is stretched at least in one direction by two stages of stretching including a relaxation step between a stretching step of a first stage and a stretching step of a second stage, wherein the difference between a refractive index of an axis parallel to the stretching direction of the optical film in the dispersed phase (I) and a refractive index of an axis parallel to the stretching direction of the optical film in the continuous phase (II) is ≥0.1.

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Inventors:

山崎達也
仲道元則
倉光匡人
梅井勇雄

Application Number:

JP2010209759A

Publication Date:

October 22, 2014

Filing Date:

September 17, 2010

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Assignee:

旭化成イーマテリアルズ株式会社

International Classes:

B29C55/06; C08J5/18; C08L21/00; C08L33/04; C08L67/02; G02B5/30; G02F1/1335

Attorney, Agent or Firm:

Yoshiyuki Inaba
Toshifumi Onuki
Akihiko Eguchi
Kazuhiko Naito

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