Mitsubishi Chemical Corporation

Mitsubishi Rayon Company, Limited

Satoshi Shimono

Takashi Kaneko

Hitoshi Kodama

Masahiro Kishi

Hiroyasu Kikawa

Katsuyuki Suzuki

Provided is a fiber-reinforced golf club shaft with small cantilever bending displacement despite its light weight, and provided to exhibit a longer carry distance while showing excellent ball flight patterns regardless of the skills of a golfer. The golf club shaft configured to have a plurality of fiber-reinforced plastic layers made of resin and a fiber material, comprising: wherein formula (1) below is satisfied when the length of the golf club shaft is set as 'L' (mm), the weight as 'W' (g), and the displacement as 'D' (mm) that is observed when a cantilever bending test is conducted by exerting a predetermined load in the vicinity of the tip end while supporting the butt end to measure the displacement at the tip end.455&#x2264;+7.5&#xd7;&#xd7;(1168/)&#x2264;515&#x2003;&#x2003;(1)

Golf club shaft

A golf club shaft which satisfies strength and is lightweight is provided by the present invention. This golf club shaft comprises one or more fiber-reinforced resin layers, and is characterized by satisfying the following relationship (1), wherein x [mm] is the displacement in a cantilever bending test, M [g] is the mass of the golf club shaft, and L [mm] is the length thereof, and by satisfying the following strength standard values [1]-[4]: M&#xd7;(L/1168)&#x3c;49.66 e(relationship 1); [1] the three-point bending strength at T-90 (the position 90 mm apart from the smaller-diameter end) is 800 N or higher; [2] the three-point bending strength at T-175 (the position 175 mm apart from the smaller-diameter end) is 400 N or higher; [3] the three-point bending strength at T-525 (the position 525 mm apart from the smaller-diameter end) is 400 N or higher; and [4] the three-point bending strength at B-175 (the position 175 mm apart from the larger-diameter end) is 400 N or higher.

Golf club shaft for wood club

Growing community of inventors

Toyohashi, Japan

Satoshi Shimono