TUBULAR BODY MADE OF CARBON FIBER-REINFORCED COMPOSITE MATERIAL AND GOLF CLUB SHAFT

• Main Authors: SAKAGUCHI, Mami, FUJIWARA, Takayuki, ICHIKAWA, Tomoko, YOSHIHIRO, Kazuki
• Format: Patent
• Language: English; French; German
• Published: 13.09.2017
• Subjects: AGRICULTURE; AMUSEMENTS; ANIMAL HUSBANDRY; APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING,CLIMBING, OR FENCING; BALL GAMES; CARE OF BIRDS, FISHES, INSECTS; FISHING; FORESTRY; GAMES; HUMAN NECESSITIES; HUNTING; NEW BREEDS OF ANIMALS; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; SPORTS; TRAINING EQUIPMENT; TRAPPING

Provided are tubular carbon fiber reinforced composite material and having excellent cylindrical bending strength and a golf club shaft using the same. This tubular carbon fiber reinforced composite material is formed by laminating and curing a straight layer and a bias layer. The straight layer comprises carbon fibers S coated with a sizing agent S and arranged in parallel in a direction of -20° to +20° with respect to the axis of the tubular body, and contains a thermosetting resin S. The bias layer comprises carbon fibers B coated with a sizing agent B and arranged in parallel in a direction of +25° to +65° with respect to the axis of the tubular body, and contains a thermosetting resin B. The carbon fiber reinforced composite material constituting the bias layer has an interlaminar shear strength of not less than 110 MPa. A cured product of the thermosetting resin S has an elastic modulus of not less than 4.0 GPa.