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    Method of stretching films according to an overbias or overstretch stretch profile
    2.
    发明授权
    Method of stretching films according to an overbias or overstretch stretch profile 有权
    根据过度拉伸或拉伸拉伸曲线拉伸薄膜的方法

    公开(公告)号：US06303067B1

    公开(公告)日：2001-10-16

    申请号：US09192060

    申请日：1998-11-13

    申请人： Chiu Ping Wong ,  Thomas P. Hanschen ,  Anthony B. Ferguson ,  William W. Merrill ,  Fred J. Roska ,  Jeffery N. Jackson

    发明人： Chiu Ping Wong ,  Thomas P. Hanschen ,  Anthony B. Ferguson ,  William W. Merrill ,  Fred J. Roska ,  Jeffery N. Jackson

    IPC分类号： B29C5514

    CPC分类号： B29C55/16

    摘要： A method of biaxially stretching a polymeric film according to an overbias or overstretch stretch profile to a final first direction stretch parameter and a final second direction stretch parameter to provide a film having uniform properties. First, a sufficiently high temperature is imparted to the film to allow a significant amount of biaxial stretch. The film is then biaxially tenter stretched to a peak first direction stretch parameter that is at least 1.3 times the final first direction stretch parameter wherein the final first direction stretch parameter is no larger than the final second direction stretch parameter. Finally, the film is retracted in the first direction from the peak first direction stretch parameter to the final first direction stretch parameter to produce a film having uniformity of properties in the first direction.

    摘要翻译： 根据过度拉伸或超伸缩拉伸轮廓将聚合物膜双轴拉伸至最终第一方向拉伸参数和最终第二方向拉伸参数以提供具有均匀性质的膜的方法。 首先，赋予膜足够高的温度以允许显着量的双轴拉伸。 然后将膜双轴拉幅拉伸至峰值第一方向拉伸参数，其为最终第一方向拉伸参数的至少1.3倍，其中最终第一方向拉伸参数不大于最终第二方向拉伸参数。 最后，将膜从第一方向拉伸参数的第一方向缩回到最终的第一方向拉伸参数，以产生在第一方向上具有均匀性的膜。

    Process for manufacturing polymeric optical film
    4.
    发明授权
    Process for manufacturing polymeric optical film 失效
    聚合物光学薄膜的制造方法

    公开(公告)号：US07132065B2

    公开(公告)日：2006-11-07

    申请号：US10364940

    申请日：2003-02-12

    申请人： Richard C. Allen ,  Matthew B. Johnson ,  Fred J. Roska ,  Steven J. Rhyner ,  William W. Merrill ,  Joan M. Strobel ,  Kevin M. Hamer ,  John M. Klaeser ,  Sebastian F. Zehentmaier

    发明人： Richard C. Allen ,  Matthew B. Johnson ,  Fred J. Roska ,  Steven J. Rhyner ,  William W. Merrill ,  Joan M. Strobel ,  Kevin M. Hamer ,  John M. Klaeser ,  Sebastian F. Zehentmaier

    IPC分类号： B29C55/14

    CPC分类号： B29C55/165

    摘要： A process for making an optical film includes stretching a polyolefin film in a first direction and stretching the polyolefin film in a second direction different than the first direction forming a biaxially stretched polyolefin film. At least a portion of the stretching of the polyolefin film in the second direction occurs simultaneous with the stretching of the polyolefin film in the first direction. The biaxially stretched polyolefin film has a length and a width and substantially non-absorbing and non-scattering for at least one polarization state of visible light. The biaxially stretched polyolefin film has x, y, and z orthogonal indices of refraction where at least two of the orthogonal indices of refraction are not equal, an in-plane retardance being 100 nm or less and an out-of-plane retardance being 50 nm or greater.

    摘要翻译： 制造光学膜的方法包括在第一方向拉伸聚烯烃膜并沿与第一方向不同的第二方向拉伸聚烯烃膜形成双轴向拉伸的聚烯烃膜。 聚烯烃膜在第二方向的拉伸的至少一部分与聚烯烃膜沿第一方向的拉伸同时发生。 双轴拉伸聚烯烃膜具有长度和宽度，并且对于至少一种可见光的偏振状态具有基本上不吸收和非散射性。 双轴拉伸聚烯烃膜具有x，y和z正交折射率，其中至少两个正交折射率不相等，面内延迟为100nm以下，面外延迟为50 nm以上。