Multi-piece solid golf ball

Abstract

In a multi-piece solid golf ball having a core, envelope layer, intermediate layer and cover, the core is formed primarily of a base rubber, the core has a diameter of at least 30 mm, the envelope layer is formed as two layers—an inner layer and an outer layer, and the intermediate layer and the cover are each formed as single layers of a resin material. The core and the respective layer-encased spheres have surface hardnesses which satisfy specific relationships, the Shore C hardness value obtained by subtracting the core center hardness from the core surface hardness is 16 or more, and certain layers have respective thicknesses which satisfy specific conditions. This ball achieves a good distance on full shots both with a driver and with irons, is superior in the short game, and moreover has a good feel at impact and an excellent scuff resistance.

Description

CROSS-REFERENCE TO RELATED APPLICATION[0001]This non-provisional application claims priority under 35 U.S.C. § 119(a) on Patent Application No. 2021-035283 filed in Japan on Mar. 5, 2021, the entire contents of which are hereby incorporated by reference.TECHNICAL FIELD[0002]The present invention relates to a multi-piece solid golf ball composed of five or more layers, including a core, an inner envelope layer, an outer envelope layer, an intermediate layer and a cover.BACKGROUND ART[0003]A variety of golf balls have hitherto been developed for professional golfers and skilled amateurs. Of these, multi-piece solid golf balls having an optimized hardness relationship among the layers encasing the core are in widespread use because they provide both a superior distance performance in the high head-speed range and also a good controllability on iron shots and approach shots. Given that not only the flight performance but also the feel of the ball at impact and the spin rate of the ball ...

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