| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an easily bonding polyester film roll for an optical use showing an excellence in transparency, weatherability and workability and having a stable color tone and an ultraviolet ray-shield in the lengthwise and widthwise directions of the film roll, and to provide a hard coat film. <P>SOLUTION: The easily bonding polyester film roll for the optical use has an easily bonding layer on at least one surface of a bi-axially stretched polyester film containing an ultraviolet ray absorbing agent and a thickness of 25 to 300 μm, a width of 400 to 1,500 mm and a roll length of 400 to 10,000 m. The bi-axially stretched polyester film has a haze value of not more than 3%, a light transmittance of not more than 3% at 380 nm or less of wavelength and b* of not more than 1.5. The easily bonding polyester film roll shows a variation of the color b* of not more than 80% in the widthwise and lengthwise directions, and a variation of the light transmittance at 380 nm of not more than 90% in the widthwise and lengthwise directions. <P>COPYRIGHT: (C)2008,JPO&INPIT |
