Sughrue Mion, PLLC
Biaxially oriented polyester film for thermal transfer ribbon
A biaxially oriented polyester film for a thermal transfer ribbon characterized in that the biaxially oriented polyester film comprises a copolymerized polyethylene-2,6-naphthalate obtained by polycondensing 90 to 99.9 mole % of 2,6-naphthalenedicarboxylic acid and 0.1 to 10 mole % of isophthalic acid as dicarboxylic acid component, and 97 to 100 mole % of ethylene glycol component and 0 to 30 mole % of diethylene glycol component as diol component, the alternating current volume resistivity of the molten product of the film is 66&times;108 &OHgr;cm or less, the plane orientation coefficient of the film is 0.230 or more and 0.275 or less, and the density of the film is 1.3450 g/cm3 or more.
Teijin Limited
B Y Y Y Y Y
B41M Y10T Y10S Y10T Y10T Y10T
inventional additional additional additional additional additional
Shinya Koji
Watanabe Furuya