Multi-piece solid golf ball

a golf ball and multi-piece technology, applied in the field of golf balls, can solve the problems of poor feel of golf balls and cannot be regarded as satisfactory by golfers, and achieve the effects of good feel at impact, excellent flight performance, and soft feel at impa

Inactive Publication Date: 2020-10-22
BRIDGESTONE SPORTS
View PDF0 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The invention is a multi-piece solid golf ball with excellent flight performance and a soft feel at impact. It is suitable for both professionals and amateurs. The ball has a core, intermediate layer, and cover with dimples on the surface. The core has a diameter of at least 37.1 mm, with an upper limit of 39.9 mm, to ensure the proper spin rate and feel at impact. The core should also have a deflection of at least 3.8 mm when compressed under a final load of 1,275 N, with an upper limit of 5.8 mm or less, to ensure good flight and durability. The ball is not too hard or too soft, but should have a good feel at impact and resistance to cracking on repeated impact.

Problems solved by technology

Moreover, some of these golf balls lack a good feel when struck with a driver and so can hardly be regarded as satisfactory by golfers whose head speeds are not fast.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Multi-piece solid golf ball

Examples

Experimental program
Comparison scheme
Effect test

examples

[0097]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

, Comparative Examples 1 to 4

Formation of Core

[0098]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)1231234Polybutadiene A20202020202020Polybutadiene B80808080808080Zinc acrylate27.024.522.027.027.030.427.0Organic peroxide (1)0.60.60.60.60.60.60.6Organic peroxide (2)0.60.60.60.60.60.60.6Zinc stearate3333333Antioxidant0.10.10.10.10.10.10.1Zinc oxide21.022.123.124.321.019.614.5Zinc salt of111110.51pentachlorothiophenol

[0099]Details on the ingredients mentioned in Table 1 are given below.[0100]Polybutadiene A: Available under the trade name “BR 51” from JSR Corporation[0101]Polybutadiene B: Available under the trade name “BR 730” from JSR Corporation[0102]Zinc acrylate: Available as “ZN-DA85S” from Nippon Shokubai Co., Ltd.[0103]Organic Peroxide (1): ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
speedaaaaaaaaaa
diameteraaaaaaaaaa
diameteraaaaaaaaaa
Login to View More

Abstract

In a multi-piece solid golf ball having a core, an intermediate layer and a cover, the cover is formed primarily of a polyurethane material, the ball has a higher surface hardness on the Shore C hardness scale than the sphere obtained by encasing the core with the intermediate layer (intermediate layer-encased sphere), and the ball has a deflection of at least 3.6 mm when compressed under a final load of 1,275 N (130 kgf) from an initial load of 98 N (10 kgf). The golf ball has an excellent flight performance when hit by golfers whose head speeds are not very fast and moreover has a good, soft feel at impact, making it suitable for use by amateur golfers.

Description

CROSS-REFERENCE TO RELATED APPLICATION[0001]This non-provisional application claims priority under 35 U.S.C. § 119(a) on Patent Application No. 2019-081142 filed in Japan on Apr. 22, 2019, the entire contents of which are hereby incorporated by reference.TECHNICAL FIELD[0002]This invention relates to a golf ball having a core, an intermediate layer and a cover which is intended for amateur golfers whose head speeds are not fast.BACKGROUND ART[0003]Key performance features required in a golf ball include distance, controllability, durability and feel at impact. Balls endowed with these qualities in the highest degree are constantly being sought. Among recent golf balls, there has emerged a succession of balls which have multilayer structures typically consisting of three pieces (or layers). By giving the golf ball a multilayered structure, it is possible to combine several materials of different properties, enabling a wide variety of ball designs to be obtained in which each layer ha...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & AuthorityApplications(United States)
IPC IPC(8): A63B37/00
CPCA63B37/0092A63B37/0087A63B37/0031A63B37/0075A63B37/0063A63B37/00621A63B37/00622A63B37/00222A63B37/0065A63B37/00921
InventorWATANABE, HIDEO
OwnerBRIDGESTONE SPORTS