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Golf ball

Inactive Publication Date: 2018-06-21
SUMITOMO RUBBER IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention is a golf ball with a unique dimple pattern that has excellent aerodynamic performance. It flies well and is easy to hit with a short iron. The ball also has good control when approaching the hole. This new design combines both desired flight performance and desired controllability.

Problems solved by technology

When a backspin rate is high, the run of the golf ball after landing is short.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0241]A rubber composition B was obtained by kneading 100 parts by weight of a high-cis polybutadiene (trade name “BR-730”, manufactured by JSR Corporation), 29.5 parts by weight of zinc diacrylate, 5 parts by weight of zinc oxide, an appropriate amount of barium sulfate, 0.9 parts by weight of dicumyl peroxide, 0.3 parts by weight of pentabromo diphenyl disulfide, 0.1 parts by weight of 2-naphthalenethiol, and 2.0 parts by weight of benzoic acid. The rubber composition B was placed into a mold including upper and lower mold halves each having a hemispherical cavity, and heated at 150° C. for 20 minutes to obtain a core with a diameter of 39.7 mm.

[0242]A resin composition M1 was obtained by kneading 47 parts by weight of an ionomer resin (the aforementioned “Himilan 1605”), 50 parts by weight of another ionomer resin (the aforementioned “Himilan AM7329”), 3 parts by weight of a styrene block-containing thermoplastic elastomer (the aforementioned “RABALON T3221C”), and 4 parts by wei...

examples 4 to 8

[0247]Golf balls of Examples 4 to 8 were obtained in the same manner as Example 1, except the specifications of the core, the mid layer, and the cover were as shown in Table 12 below. The specifications of the core are shown in detail in Table 1 below. The specifications of the mid layer are shown in detail in Table 2 below. The specifications of the cover are shown in detail in Table 3 below.

example 9

[0249]A rubber composition A was obtained by kneading 100 parts by weight of a high-cis polybutadiene (the aforementioned “BR-730”), 35 parts by weight of magnesium acrylate, 28 parts by weight of methacrylic acid, an appropriate amount of barium sulfate, and 1.3 parts by weight of dicumyl peroxide. The rubber composition A was placed into a mold including upper and lower mold halves each having a hemispherical cavity, and heated at 160° C. for 20 minutes to obtain a center with a diameter of 15.0 mm. The amount of barium sulfate was adjusted such that a center having a predetermined weight was obtained.

[0250]A rubber composition C was obtained by kneading 100 parts by weight of a high-cis polybutadiene (the aforementioned “BR-730”), 33.0 parts by weight of zinc diacrylate, 5 parts by weight of zinc oxide, an appropriate amount of barium sulfate, 0.9 parts by weight of dicumyl peroxide, and 0.3 parts by weight of pentabromo diphenyl disulfide. Half shells were formed from the rubber...

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PUM

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Abstract

A golf ball 2 includes a core 4, a mid layer 6, a cover 8, and dimples 10. A Shore C hardness Hmc of the mid layer 6 is greater than a Shore C hardness Hs at a surface of the core 4. A Shore D hardness He of the cover 8 is less than a Shore D hardness Hm of the mid layer 6. Peak values and orders of maximum peaks of data constellations of the golf ball 2 are calculated. A minimum value of the peak values is not less than 95 mm. A minimum value of the orders is not less than 27, and a maximum value of the orders is not greater than 37. An average of the orders is not less than 30 and not greater than 34.

Description

[0001]This application claims priority on Patent Application No. 2016-246079 filed in JAPAN on Dec. 20, 2016. The entire contents of this Japanese Patent Application are hereby incorporated by reference.BACKGROUND OF THE INVENTIONField of the Invention[0002]The present invention relates to golf balls. Specifically, the present invention relates to golf balls including a core, a mid layer, a cover, and dimples.Description of the Related Art[0003]The face of a golf club has a loft angle. When a golf ball is hit with the golf club, backspin due to the loft angle occurs in the golf ball. The golf ball flies with the backspin.[0004]When a backspin rate is high, the run of the golf ball after landing is short. By using a golf ball having a high backspin rate, a golf player can cause the golf ball to stop at a target point. When a sidespin rate is high, the golf ball tends to curve. By using a golf ball having a high sidespin rate, a golf player can intentionally cause the golf ball to cur...

Claims

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Application Information

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IPC IPC(8): A63B37/00
CPCA63B37/0075A63B37/0092A63B37/0017A63B37/0076A63B37/008A63B37/0083A63B37/0063A63B37/0096A63B37/0064A63B37/0067A63B37/0043A63B37/0045A63B37/0031A63B37/0033A63B37/0087A63B37/0012A63B37/002A63B37/0018A63B37/0007A63B37/0019A63B37/0021A63B37/0022A63B37/0016A63B2209/00A63B45/00A63B37/0006A63B37/00221A63B37/00922
Inventor INOUE, HIDETAKAKAMINO, KAZUYASAJIMA, TAKAHIROMIMURA, KOHEI
Owner SUMITOMO RUBBER IND LTD