| 摘要 |
A golf club has a shaft made of fiber reinforced plastics. The shaft has braided layers with substantially symmetrical diagonal yarns which are positioned at orientation angles +theta, -theta from more than 0° to +10° and from less than -0° to -10° respectively, and/or from 45° to less than +90° and from -45° to more than -90° respectively, against the longitudinal axis of the shaft at at least a portion along the longitudinal direction of the shaft. The Poisson's ratio &ngr; 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. 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.
|
