Unlock instant, AI-driven research and patent intelligence for your innovation.

Golf ball

a golf ball and ball technology, applied in the field of golf balls, can solve the problems of inferior compatibility of ionomer resins with other resins, and insufficient adhesion between the mid layer and the cover, so as to optimize the launch angle of the golf ball upon impact, the resilience performance of the golf ball, and the effect of sufficient durability

Inactive Publication Date: 2011-08-18
ISOGAWA KAZUHIKO +1
View PDF11 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The solution provides excellent flight performance, feel at impact, and durability by maintaining structural integrity through improved adhesion, optimizing launch angle, and maintaining resilience and soft feel.

Problems solved by technology

Ionomer resins are inferior in compatibility with other resins.
Ionomer resins are particularly inferior in compatibility with thermoplastic elastomers.
In golf balls having a cover comprising an ionomer resin and a mid layer comprising other resin, adhesion between the mid layer and the cover may be insufficient.
In this type of golf ball, repeated impacts may result in detachment of the cover from the mid layer.
The detachment leads to breakage of the golf ball.
In particular, according to golf balls having a thin mid layer or a thin cover, breakage is apt to be caused due to insufficient adhesion.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Golf ball
  • Golf ball

Examples

Experimental program
Comparison scheme
Effect test

experiment 1

Example 1

A type x rubber composition was obtained by kneading 100 parts by weight of high cis-polybutadiene (trade name “BR-730”, available from JSR Corporation), 25 parts by weight of zinc acrylate, 10 parts of zinc oxide, an adequate amount of barium sulfate, 0.5 part by weight of diphenyl disulfide (manufactured by Sumitomo Seika Chemicals Co., Ltd.) and 0.8 part by weight of dicumyl peroxide (manufactured by NOF Corporation). This rubber composition was placed into a mold having upper and lower mold half each having a hemispherical cavity, and heated at 170° C. for 20 minutes to obtain a core having a diameter of 39.2 mm.

In a biaxial extruder having a screw diameter of 45 mm, which provides a rotational velocity of the screw being 200 rpm, and having L / D of 35, a type b resin composition shown in Table 1 below was obtained. Temperature in the die during extrusion of the resin composition was from 180° C. to 230° C. The core was covered by this resin composition therearound with ...

examples 3 to 4

In a similar manner to Example 1 except that the diameter of the core and the thickness of the mid layer were as listed in Table 3 below, golf balls of Examples 3 to 4 were obtained.

examples 2 , 5 and 6

Examples 2, 5 and 6, and Comparative Example 1

In a similar manner to Example 1 except that the type of the resin composition of the mid layer was as listed in Table 3 below, golf balls of Examples 2, 5 and 6, and Comparative Example 1 were obtained. Details of the resin composition are shown in Table 2 below.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A golf ball having a spherical core, a mid layer covering this core, a reinforcing layer covering this mid layer, and a cover covering this reinforcing layer, wherein the base polymer of the mid layer includes a styrene block-containing thermoplastic elastomer and an ionomer resin; the mid layer has a hardness as measured with a Shore D type hardness scale of equal to or less than 54; the mid layer has a thickness of 0.5 mm or greater and 1.6 mm or less; and the base polymer of the reinforcing layer is a reaction product between carboxyl group-containing polyurethane and polycarbodiimide. The principal component of the base polymer of the cover is an ionomer resin. The cover has a hardness as measured with a Shore D type hardness scale hardness of equal to or greater than 55 and the cover has a thickness of equal to or less than 1.2 mm.

Description

BACKGROUND OF THE INVENTION1. Field of the InventionThe present invention relates to golf balls. More particularly, the present invention relates to multi piece golf balls having a core, a mid layer and a cover.2. Description of the Related ArtTop concern to golf players for golf balls is their flight performances. The golf players particularly place great importance on flight distance attained upon shots with a driver. Feel at impact is also important to golf balls. Golf players prefer soft feel at impact. Furthermore, durability is also important to golf balls. Golf balls not accompanied by breakage upon repeated impacts have been desired.In light of flight performances and feel at impact, golf balls having a variety of structures have been proposed. U.S. Pat. No. 6,106,415 (JP-A No. H10-179795) discloses a golf ball in which either one of the mid layer or the cover comprises an ionomer resin while the other comprises polyurethane. U.S. Pat. No. 6,231,460 (JP-A No. H11-253581) dis...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(United States)
IPC IPC(8): A63B37/06A63B37/00
CPCA63B37/0031A63B37/0033A63B37/0076A63B37/0045A63B37/0043
Inventor ISOGAWA, KAZUHIKOOHAMA, KEIJI
Owner ISOGAWA KAZUHIKO