| 摘要 |
<p>PROBLEM TO BE SOLVED: To prevent occurrence of a crack or the like according to working of an embossed character by forming a card having a specific thickness obtained by laminating specific number of layers of polyester resin, and setting tensile elastic moduli of front and rear layers of the card and a tensile elastic modulus of the overall card to specific values. SOLUTION: The embossed character working card is formed of a laminate of at least three layers made of polyester resin with a thickness of 2 mm or less. Tensile elastic moduli of front and rear layers of the laminate are set to a range of 1 to 3 kN/mm2, and a tensile elastic modulus of the overall laminate is set to a range of 2 to 4 kN/mm2. The moduli are set to the ranges to suppress a warp of the card according to an influence of the embossed character and to suppress occurrence of a crack of the card. A thickness of the card is set to 2 mm or less, and hence a protrusion part of the character can be clearly displayed.</p> |
