| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To improve the vibration absorptivity while maintaining a lightness and strength of a shaft. <P>SOLUTION: The golf club shaft 10 is made of a tubular fiber-reinforced resin made up of a laminate of fiber-reinforced prepregs 21 to 23, 24A, and 25 to 29, and having a hollow portion, and has a first laminate I made of a laminate of a plurality of first prepregs P1 and a second prepreg P2. The first laminate I has a loss factor (tanδ) of 0.005 or higher and 0.02 or lower which is measured at a frequency of 10 Hz at a temperature of 10°C and the second prepreg P2 has a loss factor (tanδ) of 0.10 or higher and 0.50 or less measured at a frequency of 10 Hz at a temperature of 10°C. <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
