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Golf ball

a golf ball and ball technology, applied in the field of golf balls, can solve the problems of not fully satisfying the flight performance desired on the shot with the driver, prior-art golf balls do not optimize the amount of compressive deformation, etc., to achieve excellent flight, good rebound, and solid feel at impact.

Inactive Publication Date: 2020-04-16
BRIDGESTONE SPORTS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The invention is a golf ball that has optimal performance when hit by golfers with fast head speeds. It has a solid and lively feel at impact, making it ideal for use by amateur golfers with head speeds between 43 to 54. The ball has a three-layer construction with numerous dimples on the outer surface of the cover. The core has a diameter of at least 36.0 mm and is subjected to a final load of at least 2.7 mm of compressive deformation. If the core is too hard, the spin rate may rise excessively, and if the core is too soft, the ball may not have a good feel or durability.

Problems solved by technology

However, this golf ball is a spin-type ball that is targeted primarily at the spin on approach shots, and does not fully satisfy the flight performance desired on shots with a driver.
However, these prior-art golf balls do not optimize the amount of compressive deformation when subjected to a final load of 5 kgf from an initial load state of 0.2 kgf and the amount of compressive deformation when subjected to a final load of 50 kgf from an initial load state of 5 kgf.

Method used

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  • Golf ball

Examples

Experimental program
Comparison scheme
Effect test

examples

[0090]The following Examples and Comparative Examples are provided to illustrate the invention, and are not intended to limit the scope thereof.

examples 1 to 3

mples 1 to 5

Formation of Core

[0091]Solid cores were produced by preparing rubber compositions for the respective Examples and Comparative Examples shown in Table 1, and then molding / vulcanizing the compositions under vulcanization conditions of 155° C. and 15 minutes.

TABLE 1ExampleComparative ExampleCore formulation (pbw)12312345Polybutadiene A95959595958080100Polybutadiene B2020Isoprene rubber55555Zinc acrylate27.025.324.027.425.320.825.522.8Organic peroxide (1)0.60.60.60.60.60.60.60.6Organic peroxide (2)0.60.60.60.60.60.60.60.6Zinc stearate5.0Antioxidant0.10.10.10.10.10.10.10.1Barium sulfate25.326.026.625.126.027.618.3Zinc oxide4.04.04.04.04.04.04.021.7Zinc salt of pentachlorothiophenol0.21.0Details on the ingredients mentioned in Table 1 are given below.Polybutadiene A: Available under the trade name “BR 01” from JSR CorporationPolybutadiene B: Available under the trade name “BR 51” from JSR CorporationIsoprene Rubber: Available under the trade name “IR2200” from JSR CorporationZ...

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Abstract

A golf ball for amateur golfers is endowed with both an excellent flight and a good, solid feel at impact when hit by the average amateur golfer having a fast head speed. The golf ball, which includes a core and a cover, has a compressive deformation A when subjected to a final load of 5 kgf from an initial load of 0.2 kgf that is 0.18 mm or less, a compressive deformation B when subjected to a final load of 50 kgf from an initial load of 5 kgf that is from 0.85 to 1.16 mm and a compressive deformation C when subjected to a final load of 90 kgf from an initial load of 5 kgf that is from 1.90 to 2.25 mm.

Description

CROSS-REFERENCE TO RELATED APPLICATION[0001]This non-provisional application claims priority under 35 U.S.C. § 119(a) on Patent Application No. 2018-191792 filed in Japan on Oct. 10, 2018, the entire contents of which are hereby incorporated by reference.TECHNICAL FIELD[0002]The present invention relates to a golf ball which has at least a core and a cover and is intended for use by amateur golfers having a fast head speed.BACKGROUND ART[0003]In the field of golf balls for amateur golfers, numerous balls intended to satisfy amateur golfers in terms of flight performance and feel at impact have hitherto been developed. For example, JP-A H8-280845 describes a golf ball in which the amount of compressive deformation by the ball when subjected to a final load of 5 kgf from an initial load state of 0.2 kgf is used as an indicator of the effects on the ball properties when a small impact force acts upon the ball, this value being set in the range of from 0.26 to 0.40 mm. However, this gol...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): A63B37/00
CPCA63B37/0065A63B37/0022A63B37/0087A63B37/0043A63B2037/0079A63B37/0031A63B37/0084A63B37/0075A63B37/0063A63B37/0076A63B37/0096A63B37/0068A63B37/00921A63B37/00222
Inventor WATANABE, HIDEOSATO, KATSUNORI
Owner BRIDGESTONE SPORTS