| 摘要 |
PROBLEM TO BE SOLVED: To provide a soccer ball facilitating the manufacture, withstanding long time use, and having light-storing layers with high luminous efficiency. SOLUTION: Laminated structures 21 are superposed on nonwoven materials 11 of equilateral pentagon sheets 2 constituting the soccer ball. The equilateral pentagon sheets 2 and equilateral hexagon sheets are sewn together. When the equilateral pentagon sheets 2 and the equilateral hexagon sheets are sewn together, the laminated structures 21 can be fixed. This method can facilitate the manufacture of the soccer ball having the light-storing layers 23 on the equilateral pentagon sheets 2 divided by seams of the soccer ball. The laminated structures 21 are scarcely detached from the surface of the soccer ball. Even if the soccer ball is used for a long period of time, the laminated structures 21 are prevented from being peeled. The soccer ball can thus withstand a long time of use. COPYRIGHT: (C)2006,JPO&NCIPI
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