| 摘要 |
A tubular body comprising: a main body layer formed by winding a fiber-reinforced prepreg including reinforcing fibers impregnated with a synthetic resin; and a reinforcing layer wounded around the main body. The reinforcing layer includes: an axial fiber layer including reinforcing fibers aligned in an axial direction of the tubular body; a skew fiber layer formed by aligning a first skew fiber layer formed of reinforcing fibers aligned in a skew direction and a second skew fiber layer formed of reinforcing fibers aligned in a different skew direction; a circumferential fiber layer formed by aligning reinforcing fibers in a circumferential direction of the tubular body. The axial fiber layer, the skew fiber layer and the circumferential fiber are braided with a braiding yarn softer than the reinforcing fibers to form braided prepreg as the reinforcing layer.
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