| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a card sheet excellent not only in heat resistance and heat fusibility but also in laser marking properties, also excellent in the sheet feed properties in a card lamination process and the mold releasability or the like from a mold after heat press and equipped with heat resistance, folding properties and transparency. <P>SOLUTION: The card sheet excellent in heat resistance and heat fusibility is formed of at least a three-layered sheet having core layers between skin layers and laminated by a co-extrusion method and at least one of the skin layers or core layers comprises a polymer alloy composed of 80-20 mass% of non-crystalline aromatic polyester resin with a glass transition temperature of 90°C or higher and 20-80 mass% of polycarbonate resin. The total thickness of the three-layered sheet is 50-400 μm and the ratio of the thickness of the core layers to the total thickness of the three-layered sheet is ≥25 and <85%. <P>COPYRIGHT: (C)2013,JPO&INPIT |
