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Multi-piece solid golf ball

Inactive Publication Date: 2020-06-11
BRIDGESTONE SPORTS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The invention is a new type of golf ball made up of multiple pieces that have a lower spin rate on full shots, allowing the ball to go further. It also has good controllability on approach shots, a desirable feel at impact, and excellent scuff resistance. This makes it highly useful for professional golfers and skilled amateurs. The photograph shows a cross-section of the ball with five layers, and there is a graph that uses core hardness profile data to explain the technical effects.

Problems solved by technology

Generally, when a golf ball is designed so as to favor distance, the ball tends to have too hard at feel at impact.

Method used

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  • Multi-piece solid golf ball

Examples

Experimental program
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Effect test

examples

[0113]The following Examples and Comparative Examples are provided to illustrate the invention, and are not intended to limit the scope thereof.

examples 1 to 4

, Comparative Examples 1 to 8

Formation of Core

[0114]Solid cores were produced by preparing rubber compositions for the respective Examples and Comparative Examples shown in Table 1, and then molding and vulcanizing the compositions under vulcanization conditions of 155° C. and 15 minutes.

TABLE 1Core formulationExampleComparative Example(pbw)123412345678Polybutadiene A8080Polybutadiene B202020202020202020202020Polybutadiene C80808080808080808080Zinc acrylate37.034.937.034.937.037.036.037.037.037.022.420.3Organic peroxide (1)1.01.01.01.01.01.01.01.01.01.00.60.6Organic peroxide (2)0.60.6Water0.80.80.80.80.80.80.80.80.80.8Antioxidant0.10.10.10.10.10.10.10.10.10.10.10.1Barium sulfate40.941.7Zinc oxide34.835.534.835.528.619.935.534.334.334.34.04.0Zinc salt of pentachlorothiophenol1.01.01.01.01.01.00.21.01.01.0

[0115]Details on the ingredients mentioned in Table 1 are given below.[0116]Polybutadiene A: Available under the trade name “BR 01” from JSR Corporation[0117]Polybutadiene B: Availab...

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PUM

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Abstract

In a multi-piece solid golf ball having a core, an envelope layer, an intermediate layer and a cover, the core is formed primarily of a base rubber, the envelope layer, intermediate layer and cover are each formed of a resin material, and the envelope layer is formed into two layers—an inner layer and an outer layer. The center and surface hardnesses of the core, the surface hardness of the inner envelope layer-encased sphere, the surface hardness of the outer envelope layer-encased sphere, the surface hardness of the intermediate layer-encased sphere and the surface hardness of the ball together satisfy a specific relationship. This ball exhibits a flight performance capable of satisfying professional golfers and skilled amateurs and possesses an excellent controllability on approach shots, in addition to which it 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. 2018-229798 filed in Japan on Dec. 7, 2018, the entire contents of which are hereby incorporated by reference.TECHNICAL FIELD[0002]The present invention relates to a multi-piece solid golf ball having five or more layers, including a core, an inner envelope layer, an outer envelope layer, an intermediate layer and a cover.BACKGROUND ART[0003]Various golf balls have hitherto been developed for professional golfers and skilled amateurs. Of these, from the standpoint of achieving both a superior distance performance in the high head-speed range and good controllability on shots with an iron and on approach shots, multi-piece solid golf balls having an optimized hardness relationship among the layers encasing the core are in widespread use. Moreover, because not only the flight performance, but also the feel of the ball at impact and the spin ra...

Claims

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Application Information

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IPC IPC(8): A63B37/00
CPCA63B2102/32A63B37/0092A63B37/0076A63B37/0022A63B37/0077A63B37/0045A63B37/0033A63B37/00222
Inventor WATANABE, HIDEO
Owner BRIDGESTONE SPORTS