| 摘要 |
The present invention provides a multi-piece solid golf ball having a core, an envelope layer encasing the core, an intermediate layer encasing the envelope layer, and a cover which encases the intermediate layer and has formed on a surface thereof a plurality of dimples. The envelope layer has an inner layer and an outer layer. The core is formed primarily of a rubber material. The inner and outer envelope layers, the intermediate layer and the cover are each formed primarily of the same or different resin materials. The inner and outer envelope layers, intermediate layer and cover have thicknesses which satisfy the following conditions (i) and (ii): cover thickness<intermediate layer thickness<(inner envelope layer thickness+outer envelope layer thickness) (i) (cover thickness+intermediate layer thickness)<(inner envelope layer thickness+outer envelope layer thickness). (ii) The inner envelope layer, outer envelope layer, intermediate layer and cover have Shore D hardnesses which satisfy the following condition (iii): inner envelope layer hardness<outer envelope layer hardness<intermediate layer hardness>cover hardness. (iii) The total thickness of the envelope layer is at least 2.0 mm but not more than 10.0 mm. The golf ball has an outstanding flight performance and controllability which are acceptable to professionals and other skilled players, in addition to which it has an excellent durability to cracking under repeated impact and an excellent scuff resistance.
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