Patent ID: 8409033

Claim:
A golf ball comprising a core, a cover positioned outside the core, and a large number of dimples formed on a surface of the cover, wherein, the core includes a center and a mid layer positioned outside the center, the cover is formed of a resin composition including thermoplastic polyurethane (A) and a polyisocyanate mixture (B), the polyisocyanate mixture (B) includes a urethane prepolymer (B1) having two or more isocyanate groups and a thermoplastic resin (B3) which substantially does not react with an isocyanate group, the golf ball is formed by a mold including a pair of mold halves and having a large number of pimples on a cavity face of the mold for forming the dimples, each mold half has a plurality of protrusions which project from the equator of the mold, each protrusion includes a part of one of the pimples, and when one of the mold halves is mated with the other mold half, a central angle between any two adjacent protrusions is equal to or greater than 10° and equal to or less than 20°.