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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 and good impact feel

Inactive Publication Date: 2020-03-12
BRIDGESTONE SPORTS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The invention is a new kind of golf ball that has excellent flight performance and a soft impact feel. It is suitable for use by all golfers, including amateurs. The golf ball has a four-layer construction, including a core and cover, with numerous dimples on the cover. The core has a specific compression deformation when subjected to a final load. If the core is too hard, the spin rate may rise excessively, and if the core is too soft, the ball may have a low rebound or poor durability. By maintaining the right core compression, the ball performs well and feels soft at impact.

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 kg from an initial load state of 0.2 kg and the amount of compressive deformation when subjected to a final load of 30 kg from an initial load state of 5 kg.

Method used

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  • Golf ball

Examples

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examples

[0096]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 5

Formation of Core

[0097]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 1Core formulationExampleComparative Example(pbw)123412345Polybutadiene A8080808080808080100Polybutadiene B2020202020202020Zinc acrylate28.226.929.628.228.229.630.929.627.0Organic peroxide (1)1.01.01.01.01.01.01.01.00.6Organic peroxide (2)0.6Water1.01.01.01.01.01.01.01.0Antioxidant0.10.10.10.10.10.10.10.10.1Barium sulfate27.427.926.827.427.426.826.326.824.3Zinc oxide4.04.04.04.04.04.04.04.04.0Zinc salt of pentachlorothiophenol0.30.30.30.30.30.30.30.3Details 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 CorporationZinc acrylate: Available as “ZN-DA85S...

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PUM

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Abstract

A golf ball for amateur golfers is endowed with both an excellent flight and a good feel at impact that is soft and solid when hit by the average golfer whose head speed is not very high. The golf ball, which includes a core and a cover, has a compressive deformation A when subjected to a final load of 5 kg from an initial load of 0.2 kg that is 0.21 mm or less, a compressive deformation B when subjected to a final load of 30 kg from an initial load of 5 kg that is from 0.72 to 0.90 mm and a compressive deformation C when subjected to a final load of 60 kg from an initial load of 5 kg that is from 1.55 to 1.80 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. 2018-169572 filed in Japan on Sep. 11, 2018, the entire contents of which are hereby incorporated by reference.TECHNICAL FIELD[0002]The present invention relates to a golf ball which has a core and a cover, and is intended for use by amateur golfers lacking a fast head speed.BACKGROUND ART[0003]In the field of golf balls for amateur golfers, numerous balls intended to satisfy amateur players in terms of flight performance and feel have hitherto been developed. For example, JP-A H08-280845 describes a golf ball wherein, using the amount of compressive deformation when a final load of 5 kg is applied from an initial load state of 0.2 kg as an indicator of the influence exerted on the ball properties when a small impact force has acted upon a golf ball, this value is set in the range of from 0.26 to 0.40 mm. However, this golf ball is a spin-ty...

Claims

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Application Information

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IPC IPC(8): A63B37/00
CPCA63B37/0062A63B37/0084A63B37/0031A63B37/0076A63B37/0087A63B37/0068A63B37/0063A63B37/0044A63B37/0032A63B37/0043A63B37/0086A63B37/00921A63B37/00622A63B37/00621
Inventor WATANABE, HIDEOSATO, KATSUNORI
Owner BRIDGESTONE SPORTS