Golf ball

a technology for golf balls and balls, applied in the field of golf balls, can solve the problems of poor control of balls, low rate, and inability to meet the needs of low-handicappers or professionals, and achieve the effect of improving the control of balls and improving the accuracy of balls

Inactive Publication Date: 2010-07-15
NIKE INTERNATIONAL LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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) effect

Method used

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Embodiment Construction

[0013]Referring to FIG. 1, a golf ball 100 constructed according to a preferred embodiment comprises a core 10, an intermediate layer 20, and a cover layer 30.

[0014]The core 10 is made from a thermoplastic material selected from a group consisting of ionomer resin, polyamide resin, polyester resin, polyurethane resin, and a mixture thereof. In this embodiment, ionomer resin is preferred for the core 10. The suitable ionomer resin includes HPF and Surlyn®, both commercially available from E.I. DuPont de Nemours and Company, or IOTEK®, commercially available from Exxon Corporation.

[0015]To increase the COR of the core 10 for longer flight distance, the core 10 is made from a primary material, like HPF 1000 or HPF 2000, and from an optional secondary material, like Surlyn® or IOTEK®. The secondary material of the core 10 is in an amount of 0 to 10 parts by weight, based on 100 parts by weight of the primary material of the core 10.

[0016]It is to be noted that the COR of the core 10 in ...

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PUM

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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...

Claims

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Application Information

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IPC IPC(8): A63B37/02
CPCA63B37/0003A63B37/0031A63B37/0043A63B37/0061A63B37/0087A63B37/0066A63B37/0075A63B37/0077A63B37/0078A63B37/0064
Inventor CHENG, HSINCHOU, CHIEN-HSINISHII, HIDEYUKIKABESHITA, YUTAKA
Owner NIKE INTERNATIONAL LTD
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