| 摘要 |
<P>PROBLEM TO BE SOLVED: To restrain a warp in emboss processing and prevent the shape of a module from being embossed to the surface. <P>SOLUTION: In a plastic card, two-layered core materials and one-layered covering materials each are laminated in order on both sides of an antenna module layer, and the layers are vertically symmetrical with the antenna module layer as the center. In addition, a resin mixing ratio, that is, the mixing ratio by weight of an amorphous polyethylene terephthalate resin to a polycarbonate resin in one layer of the two-layered core material is 70:30 to 50:50, and the mixing ratio by weight of the amorphous polyethylene terephthalate resin to the polycarbonate resin in the other layer of the two-layered core material is 100:0 to 50:50. The content of the polycarbonate in the whole plastic card is 30 to 50 wt.%. <P>COPYRIGHT: (C)2004,JPO&NCIPI |
