| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a thermally adhesive white polyester film improved in thermal adhesiveness, unevenness absorbability and slip properties while keeping environmental properties (containing no halogen), heat resistance and chemical resistance as a plastic material which constitutes an IC card or an IC tag. <P>SOLUTION: In the thermally adhesive white polyester film constituted so that a biaxially stretched polyester film containing one of or both of a white pigment and fine voids therein is used as a base material and a thermal adhesive layer is laminated on one side or both sides of the base material, the thermal adhesive layer has a thickness of 5-30 μm and comprises a mixture of an amorphous polyester resin A with a glass transition temperature of 50-95°C and a thermoplastic resin B incompatible with the amorphous polyester resin A. The thermoplastic resin B is a crystalline resin with a melting point of 50-180°C and contained in the thermal adhesive layer in an amount of 1-30 mass%. <P>COPYRIGHT: (C)2007,JPO&INPIT |
