Grip for sporting goods and golf club

Patent metadata

Field	Value
Publication number	US-9630077-B2
Application number	US-201514940791-A
Country	US
Kind code	B2
Filing date	Nov 13, 2015
Priority date	Nov 14, 2014
Publication date	Apr 25, 2017
Grant date	Apr 25, 2017

Abstract

An object of the present invention is to provide a grip for sporting goods excellent in tensile strength and having a light weight. The present invention provides a grip for sporting goods comprising a cylindrical portion composed of a cylindrical inner layer and a cylindrical outer layer covering the cylindrical inner layer, wherein the cylindrical inner layer is a porous rubber layer or a porous resin layer, and the cylindrical outer layer is formed from a rubber composition containing an acrylonitrile-butadiene based rubber.

First claim

The invention claimed is:

1. A grip for sporting goods comprising a cylindrical portion composed of a cylindrical inner layer and a cylindrical outer layer covering the cylindrical inner layer, wherein
the cylindrical inner layer is a porous rubber layer,
the cylindrical inner layer is a foamed layer formed from an inner layer composition containing a base rubber and microballoons,
the cylindrical inner layer has a foaming ratio ranging from 1.2 to 5.0,
the cylindrical outer layer is a foamed layer formed from a rubber composition containing acrylonitrile-butadiene based rubber and a foaming agent, and
the cylindrical outer layer has a smaller foaming ratio than the cylindrical inner layer.

2. The grip for sporting goods according to claim 1 , wherein the inner layer composition contains the microballoons in an amount ranging from 5 parts by mass to 20 parts by mass with respect to 100 parts by mass of the base rubber.

3. The grip for sporting goods according to claim 1 , wherein the base rubber is at least one selected from the group consisting of a natural rubber, an ethylene-propylene-diene rubber, a butyl rubber, an acrylonitrile-butadiene rubber, a hydrogenated acrylonitrile-butadiene rubber, a carboxyl-modified acrylonitrile-butadiene rubber, a butadiene rubber, a styrene-butadiene rubber, and a polyurethane rubber.

4. The grip for sporting goods according to claim 1 , wherein the acrylonitrile-butadiene based rubber is at least one selected from the group consisting of a carboxyl-modified acrylonitrile-butadiene rubber, a hydrogenated acrylonitrile-butadiene rubber, and a carboxyl-modified hydrogenated acrylonitrile-butadiene rubber.

5. The grip for sporting goods according to claim 1 , further comprising an adhesive layer between the cylindrical inner layer and the cylindrical outer layer.

6. The grip for sporting goods according to claim 1 , wherein the cylindrical outer layer has a thickness of 0.1 mm or more.

7. The grip for sporting goods according to claim 1 , wherein the cylindrical outer layer has a material hardness ranging from 30 to 80 in JIS-A hardness, and the cylindrical inner layer has a material hardness ranging from 10 to 80 in JIS-A hardness.

8. The grip for sporting goods according to claim 1 , wherein the cylindrical outer layer is a solid layer.

9. A golf club comprising a shaft, a head provided on one end of the shaft, and a grip provided on another end of the shaft, wherein the grip comprises a cylindrical portion composed of a cylindrical inner layer and a cylindrical outer layer covering the cylindrical inner layer, and wherein
the cylindrical inner layer is a porous rubber layer,
the cylindrical inner layer is a foamed layer formed from an inner layer composition containing a base rubber and microballoons,
the cylindrical inner layer has a foaming ratio ranging from 1.2 to 5.0,
the cylindrical outer layer is a foamed layer formed from a rubber composition containing acrylonitrile-butadiene based rubber and a foaming agent, and
the cylindrical outer layer has a smaller foaming ratio than the cylindrical inner layer.

10. The golf club according to claim 9 , wherein the inner layer composition contains the microballoons in an amount ranging from 5 parts by mass to 20 parts by mass with respect to 100 parts by mass of the base rubber.

11. The golf club according to claim 9 , wherein the base rubber is at least one selected from the group consisting of a natural rubber, an ethylene-propylene-diene rubber, a butyl rubber, an acrylonitrile-butadiene rubber, a hydrogenated acrylonitrile-butadiene rubber, a carboxyl-modified acrylonitrile-butadiene rubber, a butadiene rubber, a styrene-butadiene rubber, and a polyurethane rubber.

12. The golf club according to claim 9 , wherein the acrylonitrile-butadiene based rubber is at least one selected from the group consisting of a carboxyl-modified acrylonitrile-butadiene rubber, a hydrogenated acrylonitrile-butadiene rubber, and a carboxyl-modified hydrogenated acrylonitrile-butadiene rubber.

13. The golf club according to claim 9 , wherein the grip for sporting goods comprises an adhesive layer between the cylindrical inner layer and the cylindrical outer layer.

14. The golf club according to claim 9 , wherein the cylindrical outer layer has a thickness of 0.1 mm or more.

15. The golf club according to claim 9 , wherein the cylindrical outer layer has a material hardness ranging from 30 to 80 in JIS-A hardness, and the cylindrical inner layer has a material hardness ranging from 10 to 80 in JIS-A hardness.

16. The golf club according to claim 9 , wherein the cylindrical outer layer is a solid layer.

Assignees

• Dunlop Sports Co Ltd
• Dunlap Sports Co Ltd

Inventors

• Mikura Chiemi
• Goji Sho
• Shiga Kazuyoshi
• Horiuchi Kuniyasu
• Tarao Toshiyuki
• Inoue Hidetaka
• Oyama Hitoshi
• Hasegawa Hiroshi

Classifications

• C08K7/22

  Expanded, porous or hollow particles · CPC title

• A63B60/08 Primary

  characterised by the material · CPC title

• A63B2209/00

  Characteristics of used materials · CPC title

• A63B53/14

  Handles · CPC title