Patent ID: 6926617
Filing Date: 2005-08-09
Classification: A63B

Abstract:
1. A golf club shaft comprising a laminate of prepregs composed of a resin and a reinforcing fiber impregnated with said resin, comprising: an angular layer composed of prepregs in which said reinforcing fiber inclines to an axis of said golf club shaft, wherein said angular layer is disposed substantially along the entire length of the shaft; a plurality of straight layers disposed outside said angular layer and composed of prepregs in which said reinforcing fiber is disposed substantially parallel with said axis of said golf club shaft, wherein said plurality of straight layers is disposed substantially along the entire length of the shaft; and wherein said reinforcing fiber of said prepreg at an inner side of said plurality of straight layers has a tensile modulus of elasticity in a range of 280 to 380 GPa and a tensile strength in a range of 4400 to 6500 MPa, and wherein a tensile break strain of said prepreg at an outer side of said plurality of straight layers is set to not less than 1.8% and higher than that of said prepreg at said inner side of said plurality of straight layers which is set to a range of 1.0% to 1.6%.