Patent ID: 6761968
Filing Date: 2004-07-13
Classification: B29C,B29K,B41M,Y10S,Y10T

Abstract:
A biaxially oriented polyester film which (A) contains 0.1 to 2 wt % of first inert inorganic particles having an average particle diameter of 0.5 to 5 &mgr;m, (B) satisfies the relationship HS/F5&lE;0.028 in which HS is a heat shrinkage factor (%) in the longitudinal direction of the film when it is heated at 200Â° C. for 10 minutes and F5 is an F-5 value (N/mm2) in the longitudinal direction of the film at 23Â° C., and (C) is formed by simultaneous biaxial orientation.