| abstract |
A practice golf ball comprising a core and a cover, wherein the core is formed of a rubber composition containing a base rubber, a co-crosslinking agent, a crosslinking initiator and a metal oxide. A golf ball for practice characterized in that methacrylic acid is used as a crosslinking agent, the cover resin material has a breaking strength of 20 to 80 MPa, and an elongation of 150 to 600%. [Effect] According to the golf ball for practice of the present invention, the required characteristics of the practice ball used for a long period of time are superior to those of a normal game ball in terms of cracking durability and appearance durability, and are also used in ordinary practice balls. The ball surface chipping durability is superior to that of a one-piece golf ball. [Selection] Figure 1 |