| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To prevent the breakage of a resin member and to improve durability. <P>SOLUTION: For a golf club head 1, at least a part of a crown part 4 forming a head upper surface is formed of the resin member FR composed of a fiber reinforced resin in which fibers are oriented in a matrix resin. The resin member FR includes a fiber cross lamination part where unidirectional fiber reinforced resin layers in which the fibers are oriented in one direction are laminated while making the direction of the fibers different. Also, in at least two unidirectional fiber reinforced resin layers adjacent to each other in a thickness direction, the fibers are crossed at the angle of 30-130°. Also, the compressive strength of the fibers of the unidirectional fiber reinforced resin layer disposed most on the inner side of the fiber cross lamination part is≥1.3GPa. <P>COPYRIGHT: (C)2006,JPO&NCIPI</p> |
