| 摘要 |
A synthetic resin card and a method of producing the card, where a warp of the card can be restrained. The difference (Delta) between orientation angles of outer layers symmetrically layered with respect to a card core portion is made not more than 20°. This can reduce stress imbalance caused by different shrinking ratios of the outer layers, enabling a card warp to be reduced. Further, the thickness of an outer layer is set to 25 mum to 125 mum, and this can reduce rise of the synthetic resin card surface. Running ability of the card when it is run in a device can be improved by the reduced card warp and rise of the card surface. |
