Biaxially oriented polyester films and their production methods,申请号SG19980004096-传众专利搜索

Biaxially oriented polyester films and their production methods

申请公布号：SG76565(A1)

申请号：SG19980004096

申请日期：1998.10.07

申请公布日期：2000.11.21

申请人：

TORAY INDUSTRIES, INC.

发明人：ASAKURA MASAYOSHI;ETOU KENICHI;TSUNEKAWA TETSUYA

分类号：B29C55/16;C08J5/18;(IPC1-7):C08J5/18

主分类号：B29C55/16

摘要：<p>Disclosed is a biaxially oriented polyester film that is 7.0 GPa or more in either the Young's modulus in the machine direction (YmMD) or in the transverse direction (YmTD), and in the range of 55 DEG or more and 85 DEG or less in the circumferential half-width of the diffraction line from the crystal plane in the direction of the polyester's backbone chain that is determined through crystal orientation analysis by wide angle X-ray diffractometry performed while rotating the polyester film around its normal. The film is high in rigidity in all directions within the film plane, high in tear resistance, high in dimensional stability, and resistant to deformation under load, and have very great industrial advantages as material for high-density magnetic recording media, with wide applicability as material for electrostatic capacitor, heat transfer ribbon, and base paper for thermosensitive stencil printing.</p>