Golf ball

Abstract

The present invention provides a golf ball having excellent flyer resistance at a shot on the rough, and having high rebound characteristics and excellent flight performance. The present invention relates to a golf ball comprising a core having a single-layered structure or a multi-layered structure and a cover covering the core, wherein the cover has a complex elastic modulus at -10° C. of 20 to 150 MPa and loss tangent (tan delta) at -10° C. of not less than 0.05, as determined from temperature-dependent curves of the complex elastic modulus and tan delta obtained by dynamic viscoelastic measurement at a frequency of 10 Hz, a dynamic strain of 5% and a heating rate of 4° C./min.

Description

[0001] The present invention relates to a golf ball having excellent spin performance. More particularly, it relates to a golf ball having excellent flyer resistance at a shot on the rough, and having high rebound characteristics and excellent flight performance.[0002] Solid golf balls, such as a two-piece golf ball or three-piece golf ball, and thread wound golf balls have been used for round games. The solid golf ball consists of a solid core of integrally molded rubber material comprising polybutadiene as a main component and a cover of thermoplastic resin (e.g. ionomer resin) covering on the solid core. The thread wound golf ball consists of a solid or liquid center, a thread rubber layer formed by winding thread rubber in a stretched state around the center, and a cover of ionomer resin or balata etc. covering on the thread wound layer.[0003] A golf ball is often placed in a rough or tall lawn by accident in a round play. When one hit the ball from the lawn, a phenomenon called...

AI Technical Summary

Benefits of technology

0036] At the time of molding the cover, many depressions called "dimples" may be optionally formed on the surface of the golf ball. Furthermore, paint finishing or marking with a stamp may be optionally provided after the cover molded for commercial purposes. Factors, which have an effect on the shape and surface of the cover, have an effect on the friction force and spin of the golf ball when the golf ball directly contacts with the golf club face, but have no effect on the flyer resistance when putting the grass between the golf club face and the golf ball. The golf ball of the present invention is formed, so that it has a diameter of not less than 42.67 mm (preferab

Problems solved by technology

The flyer phenomenon would bring about difficulty in controlling the ball trajectory and spin amount and especially causes poor controllability at approach shots, which has been a problem to be solved.

The phenomenon occurs regardless of the solid golf ball or thread wound golf ball, and many golf players are troubled with it.

In case of the golf ball using balata cover, it has been known that the flyer is difficult to occur and the controllability of spin is excellent, but t