公开(公告)号：US20020167111A1

公开(公告)日：2002-11-14

申请号：US10118910

申请日：2002-04-10

申请人： Toray Industries, Inc.

发明人： Tetsuya Tsunekawa ,  Hirofumi Hosokawa ,  Takuji Higashioji

IPC分类号： B29C055/14

CPC分类号： G11B5/7305 ,  C08J5/18 ,  C08J2367/02 ,  C08J2379/08 ,  C08L67/02 ,  C08L79/08 ,  Y10S428/91 ,  Y10T428/24355 ,  Y10T428/2495 ,  Y10T428/24967 ,  Y10T428/31721 ,  Y10T428/31786

摘要： An object of the present invention is to provide a biaxially oriented high quality polyester film excellent in thermal dimensional stability and clarity and also excellent in productivity, and also to provide a production process thereof. Another object is to provide a biaxially oriented polyester film greatly improved in the practical properties respected in various applications of the polyester film, such as the recording track shift in magnetic recording tape application, curling in magnetic recording card application, dimensional change during process in printing plate application, printing shift in ribbon application, thermostability in capacitor application, and perforation sensitivity and low temperature curling in heat-sensitive mimeograph stencil application. The objects of the present invention can be achieved by a biaxially oriented polyester film, comprising a polyester (A) mainly composed of ethylene terephthalate and a polyether imide (B), having a single glass transition temperature, and having a refractive index of 1.60 to 1.80 at least in either the machine direction or the transverse direction.

摘要翻译： 本发明的目的是提供热尺寸稳定性和透明度优异且生产率优异的双轴取向高品质聚酯薄膜，并提供其制造方法。 另一个目的是提供在聚酯薄膜的各种应用中所具有的实用性能中大大提高的双轴取向聚酯薄膜，例如磁记录带应用中的记录轨迹偏移，磁记录卡应用中的卷曲，印刷过程中的尺寸变化 板材应用，色带应用中的印刷移位，电容器应用中的热稳定性，以及热敏油版印刷模版应用中的穿孔灵敏度和低温卷曲。 本发明的目的可以通过双轴取向的聚酯薄膜来实现，所述双轴取向聚酯薄膜包括主要由对苯二甲酸乙二酯组成的聚酯（A）和具有单一玻璃化转变温度的聚醚酰亚胺（B）），折射率为1.60至 至少在机器方向或横向方向上为1.80。