TUBULAR BODY OF FIBER REINFORCED PLASTIC

摘要

PROBLEM TO BE SOLVED: To provide a tubular body of FRP(fiber reinforced plastic) which has excellent flexural strength and compression strength under the conditions of high temperature and moisture absorption and is suitable for a golf club shaft, a truss structure member, etc. SOLUTION: In a tubular body of FRP, FRP has reinforcing fibers which are oriented at an angle of±25 deg. to the axial direction of the tubular body, and the reinforcing fibers contain non-circular cross section fibers in which a minimum secondary profile degree Pmin defined by an expression of Pmin= Imin/A<2> is 0.085 or more, where Imin is the minimum value of cross section secondary moment concerning an axis passing through the center of gravity of a single fiber; A is the cross section of the single fiber.