Golf ball

Abstract

A golf ball is provided with a compression deformation of 2 mm and 4 mm and has a core made from a thermoplastic material, an intermediate layer made from a thermoset material, and at least one cover layer. The COR of the core falls between 0.78 and 0.89 and is higher than that of the whole golf ball. In this way, the golf ball has long flight distance and good hitting feel to fit both of the amateur golfers, whose swing speed is lower, and the low-handicap or professional golfers, whose swing speed is higher.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The present invention relates to a golf ball, and more particularly, to a golf ball having long flight distance and good hitting feel.[0003]2. Description of the Related Art[0004]The flight distance is regarded as one of the significant criteria for evaluation of a golf ball. Generally speaking, while different golf balls are hit by the same golf club with the same head speed under the same environment, the primary factors that the flight distance of every golf ball is subject to change contain initial velocity, spin rate, and launch angle of the ball. Among the factors, the initial velocity is the key. In the prior art of the golf ball, coefficient of restitution (COR) is a substitution parameter of the initial velocity. If the COR of the golf ball is higher, in general, the flight distance of the ball will be longer.[0005]The popular golf ball sold in the market for the common amateur golfers are a two-piece ball havi...

AI Technical Summary

Benefits of technology

[0011]The golf ball of the present invention has a compression deformation of 2 mm to 4 mm and comprises a core made from a thermoplastic material, an intermediate

Problems solved by technology

However, when the golfer strikes such ball with a short iron, the hitting feel is worse and the spin rate is low, such that the golfer has worse control of the ball and thus the two-piece ball is not popular for the low-handicappers or professionals.

Such ball has good hitting feel but the diameter of the core is too small to provide long flight distance.

However, such ball fails to produce sufficient moment of inertia (MOI) effectively and to have good hitting feel.

However, the Shore D hardness of the intermediate layer is too large to enable the golf ball to have good hitting feel.

Such ball comprising the 1.5 inches to 1.54 inches sphere inside has long flight distance but has a bad hitting feel because of overgreat diameter of the sphere thereof.

Besides, it is not easy to produce the wound ball, so that such ball is not applicable to the mass production.

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