English Abstract

Development of Golf Balls

Bridgestone Sports Co., Ltd., Chichibu, Saitama, Japan
Nippon Gomu Kyokaishi,(2020),93(2),64-69 General Review in Japanese

Just as the rules of playing golf, golf balls also have rules as equipment. Many of the golf balls sold on the market are certified balls, but various measures are taken to support golfers while satisfying the rules. The purpose of this article is to introduce the field of golf ball development by providing three examples of technology used in our products.
During a driver shot, the ball is greatly deformed and affected by the physical properties of the core inside the ball. The first technical example is the compounding technology that improves the rebound of the core. This technology is verified by dynamic mechanical analysis, and the TEM image that shows the state of micro-dispersion change of the co-crosslinking agent due to the developed compounding. The second technical example introduces the compounding technology to obtain the optimal trajectory and flight distance by suppressing the spin of the ball by optimal deformation during a tee shot.
Specifically, it is realized by a compounding technology that expands the difference in hardness between the core surface and the center. Finally, the article introduces the technology that reduces the repulsion of the ball during an approach shot to the optimum level while maintaining the rebound during a driver shot.

Keywords: Golf Ball, Development, Rules, Rebound, Deformation, Compounding