To provide a soccer ball facilitating the manufacture, withstanding long time use, and having light-storing layers with high luminous efficiency.
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.
| JP2007506848 | Alloy blend of polyurethane and latex rubber |
| JPH0919516 | BALL FOR BALL GAME |
| WO/2002/011822 | MEDICINE BALL |
KONDO YOKO
Satoshi Kabazawa
Tetsuya Yamada
Shuichi Hattori