| 摘要 |
A three-piece wound golf ball having improved characteristics of moment of inertia, initial spin and total flight distance with minimal dispersion, the ball comprising: a solid center core portion which is substantially spherical, is composed mainly of polybutadiene having a core diameter of 1.35-1.50 inches (34.3-38.1 mm), a specific gravity of 1.23-1.24; and a Shore D durometer hardness of 55-75 and a compression of 59-75 on an Atti compression tester; an intermediate thread-wound portion wound with an elastomeric thread material upon the core portion to a diameter of 1.540-1.600 inches (39.1-40.6 mm), the thread having an elongation of 800-1000%, a tensile strength of 4000-5000 psi, and a rectangular cross-section configuration of 0.0625 (+/-0.002) inch x0.024(+/-0.006) inch; and a cover portion form of a thermoplastic material having a flexural modulus of 5,000-10,000 psi, and a shore D durometer hardness of 55-65, the cover having multiple dimples provided therein occupying 70-80% of the surface area of the ball, the dimples having a total volume of 400-500 mm3; the ball having an outside diameter of 1.680-1.688 inch (42.7-42.9 mm), a weight of 44.5 to 45.9 grams, a density of 1.090-1.118 g/cm3, and an Atti compression reading of 85 +/-15 points.
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