| 摘要 |
<p>A golf club 1 has a shaft 2 made of fiber reinforced plastics. The shaft 2 has braided layers 21 with substantially symmetrical diagonal yarns 11, 12 which are positioned at orientation angles +θ, -θfrom more than 0 DEG to +10 DEG and from less than -0 DEG to -10 DEG respectively, and/or from 45 DEG to less than +90 DEG and from -45 DEG to more than -90 DEG respectively, against the longitudinal axis 13 of the shaft 2 at at least a portion along the longitudinal direction of the shaft 2. The Poisson's ratio nu expressed by the ratio of lateral strain to longitudinal strain is 0.5 or less at least at the portion when load is applied to the shaft 2. The portion with the Poisson's ratio of 0.5 or less is preferably on the grip side, thus facilitating a swing of the club 1. <IMAGE></p> |
