公开(公告)号：US10974110B2

公开(公告)日：2021-04-13

申请号：US16321289

申请日：2018-05-17

Applicant: NHK Spring Co., Ltd.

Inventor： Kosuke Fujiwara ,  Akihisa Inoue

IPC: A63B53/10 ,  A63B53/12 ,  C09J1/00 ,  C09J163/00 ,  C08K3/04 ,  C08K5/00 ,  C08K5/17

Abstract: Provided is a golf shaft comprising an element tube made of steel, a plating layer formed on an outer periphery of the element tube, an outer layer covering the plating layer, an adhesive layer interposed between the plating layer and the outer layer to bond between the plating layer and the outer layer. The outer layer is formed of a fiber reinforced plastic having a matrix resin that is an epoxy resin, and the adhesive layer is an epoxy resin composition or a carbon nano tube resin composition, the epoxy resin composition comprising an epoxy resin and a mixed curing agent in which two or more kinds of amine-based curing agents are mixed, and the carbon nano tube resin composition comprising an epoxy resin and at least one kind of curing agents as well as dispersed carbon nano tubes.

公开(公告)号：US11738246B2

公开(公告)日：2023-08-29

申请号：US17776634

申请日：2021-10-27

Applicant: NHK SPRING CO., LTD.

Inventor： Akihisa Inoue

IPC: A63B53/12 ,  C25D3/04 ,  C25D5/14 ,  C25D5/00 ,  C25D3/12 ,  C25D7/04

CPC classification number: A63B53/12 ,  C25D3/04 ,  C25D3/12 ,  C25D5/14 ,  C25D5/627 ,  C25D7/04 ,  Y10T428/12854

Abstract: Provided is a golf shaft, capable of ensuring peeling resistance of a colored layer to endure a bending process and the like. The golf shaft has a metal element tube, and a colored plating layer being a colored layer formed on a surface of the element tube, wherein the colored plating layer has a first strike plating layer on the element tube side, a satin-like plating layer layered on a surface of the first strike plating layer, a second strike plating layer layered on a surface of the satin-like plating layer, and a decorative plating layer layered on a surface of the second strike plating layer and colored according to a color of the colored plating layer.