BIAXIALLY STRETCHED FILM AND METHOD FOR MANUFACTURING SAME, POLARIZER PROTECTIVE FILM, DECORATIVE FILM, AND LAYERED FILM
    66.
    发明公开
    BIAXIALLY STRETCHED FILM AND METHOD FOR MANUFACTURING SAME, POLARIZER PROTECTIVE FILM, DECORATIVE FILM, AND LAYERED FILM 审中-公开
    其制造POLARISIERERSCHUTZFILM,图形膜与涂膜中的双轴取向膜和过程

    公开(公告)号:EP3127681A1

    公开(公告)日:2017-02-08

    申请号:EP15772473.3

    申请日:2015-03-26

    申请人: Kuraray Co., Ltd.

    摘要: The present invention provides a method of manufacturing a biaxially stretched film which exhibits small heat shrinkage and has excellent dimensional stability. An unstretched thermoplastic resin film composed of at least one thermoplastic resin layer is biaxially stretched in a longitudinal direction and a width direction to manufacture the biaxially stretched film. The method of manufacturing the biaxially stretched film according to the present invention includes: a process (I) for preheating the thermoplastic resin film to a temperature in a rubbery plateau region in a storage elastic modulus curve; a process (II) for biaxially stretching the thermoplastic resin film under a condition that a stretching speed is 500%/min or higher while heating the thermoplastic resin film to the temperature in the rubbery plateau region; a process (III) for cooling the thermoplastic resin film after the process (II) to a temperature in a glass-to-rubber transition region or a glass region in the storage elastic modulus curve; and a process (IV) for relaxing the thermoplastic resin film after the process (III) under the temperature in the glass-to-rubber transition region.

    摘要翻译: 本发明提供了一种制造双轴拉伸薄膜表现出小的热收缩率,并且具有优异的尺寸稳定性的方法。 未拉伸热塑性树脂薄膜构成的至少一个热塑性树脂层的双轴是在纵向方向和宽度方向以制造双轴拉伸电影拉伸。 制造双轴的方法拉伸膜,gemäß到本发明包括:用于将热塑性树脂膜预加热至在贮存弹性模量曲线的橡胶平台区域的温度的方法(I); 对于双轴拉伸的热塑性树脂膜的一个条件的方法(II)做了拉伸速度500%/ min或更高,同时加热该热塑性树脂膜在橡胶态高区域中的温度; 用于过程(II),以在玻璃 - 橡胶转变区中或在储存弹性模量曲线的玻璃区的温度之后冷却该热塑性树脂膜的方法(III); 和放松的工艺(IV)的热塑性树脂膜后的玻璃 - 橡胶转变区域中的温度下的过程(III)。