Tubular body made of carbon fiber-reinforced composite material and golf club shaft

• Main Authors: YOSHIHIRO, KAZUKI, SAKAGUCHI, MAMI, ICHIKAWA, TOMOKO, FUJIWARA, TAKAYUKI
• Format: Patent
• Language: Chinese; English
• Published: 01.10.2016
• Subjects: AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; AMUSEMENTS; APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING,CLIMBING, OR FENCING; BALL GAMES; GAMES; HUMAN NECESSITIES; LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; PERFORMING OPERATIONS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; SPORTS; TRAINING EQUIPMENT; TRANSPORTING; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

Provided are a tubular body made of a carbon fiber-reinforced composite material and having excellent cylindrical bending strength and a golf club shaft using the same. This tubular body made of a 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 DEG to +20DEG 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 DEG to +65 DEG 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.