| 摘要 |
PROBLEM TO BE SOLVED: To provide the outstanding printability and suppress the generation of a poor outward appearance by forming injection-moldings of a thermoplastic resin with grooves having a width of a specific value and a crossectional area whose dimensional accuracy is high within the range represented by a specific formula, formed on the surface of the moldings. SOLUTION: Grooves to be formed on the surface of moldings are of a correctional shape such as square or semicircular not particularly defined and are free from defects in filling the grooves with a conductive paste or a conductive ink and further, are 1-500μm wide (a) to such an extent that the area for storing a required circuit is not narrowed. The crossectional area bμm<2> is set within the range of 5a<2> >b>a<2/2> in order to prevent wiring from being cut and also a sheet from being broken due to the concentration of a stress. The injection-moldings with grooves having a width (a) and a crossectional area (b) are manufactured using a thermoplastic polymer alloy composed mainly of a styrene resin such as polystyrene or a non-crystalline thermoplastic resin or a non-crystalline resin such as polyarylate, or some crystalline thermoplastic resin whose crystalline is low. Thus it is possible to enhance the printability and suppress the generation of defects in the outward appearance.
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