PURPOSE: To reduce a bending angle of respective yarns, by constituting a woven fabric of the first group of yarns extending in the circumferential direction thereof, the second group of yarns arranged in a plane radially extending from the center of the woven fabric and the third group of yarns extending along the inner surface of the woven fabric in the axial direction thereof.

CONSTITUTION: A woven fabric (F) is constituted of three yarn groups of the first group of yarns 15, extending in the circumferential direction thereof and laminated in plural layers, the second group of yarns 5 arranged zigzag in a plane radially extending from the center of the woven fabric (F) and the third group of yarns 7 arranged as yarns in the warp direction between the first group of the yarns so as to extend along the inner surface of the woven fabric (F) in the axial direction thereof.