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    • 30. 发明公开
    • ORIENTED LAMINATED FILM
    • 取向层压膜
    • EP2698252A1
    • 2014-02-19
    • EP11863540.8
    • 2011-11-30
    • Teijin Limited
    • OYA, TaroONO, YuheiUCHIYAMA, Akihiko
    • B32B27/36B32B7/02B32B27/00G02B5/26G02B5/28
    • G02B1/04B32B27/08B32B27/36B32B2250/244B32B2250/42B32B2307/416B32B2307/418B32B2307/514B32B2307/518B32B2551/00G02B5/287G02B5/3041Y10T428/24975C08L67/00C08L101/16
    • Provided is an oriented laminated film, characterized in that the film is obtained by alternately laminating Layer A and Layer B such that reflection is generated by optical interference due to a difference in refractive indices of Layer A and Layer B, wherein Layer A comprises an aromatic polyester containing trimethylene-2,6-naphthalenedicarboxylate as a main repeating unit and has a layer thickness in a range of 0.05 to 0.5 µm and Layer B comprises a polylactic acid composition and has a layer thickness in a range of 0.05 to 0.5 µm, and a reflectivity curve thereof for light in a wavelength range of 400 to 1,600 nm has a reflection peak having a maximum reflectivity which is at least 20% higher than the reflectivity baseline. The present invention can provide a laminated film having high reflectivity with improved thickness variation associated with stretching treatment and improved hue irregularity attributable to a state of lamination.
    • 提供一种取向层合膜,其特征在于,所述膜通过交替地层合层A和层B而获得,使得由于层A和层B的折射率的差异而由光学干涉产生反射,其中层A包含芳香族 以1,3-二亚甲基-2,6-萘二甲酸酯为主要重复单元的聚酯,其层厚为0.05〜0.5μm,B层为聚乳酸组合物,层厚为0.05〜0.5μm, 其对于400至1,600nm波长范围内的光的反射率曲线具有反射峰值,该反射峰值具有比反射率基线高至少20%的最大反射率。 本发明可以提供一种具有高反射率的层压膜,其伴随着拉伸处理而改进的厚度变化和由于层压状态而改善的色调不规则性。