| 摘要 |
PROBLEM TO BE SOLVED: To provide a hardball baseball ball improved in durability.SOLUTION: A hardball baseball ball 1 according to the present invention includes a core body 10 including a central core part 11 configuring a central part and an intermediate core part configured by threads wound around a periphery of the central core part 11, and an outer leather part 20 configured by cowhide disposed around a periphery of the core body 10. The hardball baseball ball 1 further includes hot-melt adhesive 30 impregnated in an outer face of the intermediate core part to a depth of 0.5 to 4 mm in a diameter direction. |
