| 摘要 |
PROBLEM TO BE SOLVED: To provide a laminated white polyester film for an IC card available for the core sheet of the IC card, in which adhesion properties for ink, matt properties, curl resistance, carrying properties are excellent and especially masking properties are excellent. SOLUTION: In the laminated white polyester film for the IC card, the laminated film is formed by laminating a layer A consisting of polyester A on one side of a layer B consisting of polyester B. Polyester A contains 5-35 wt.% white pigment having 0.1-1.0 μm mean particle diameter and intrinsic viscosity is 0.45-0.80 dl/g. Polyester B is polyester containing 2-35 wt.% at least one kind of black pigment selected from carbon black and artificial graphite. Whiteness of the face of the layer A in the laminated film is >=85 and the optical density of the laminated film is 1.5-6.0. |
