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1. (WO2018123781) COMPOSITE TUBE

Pub. No.:    WO/2018/123781    International Application No.:    PCT/JP2017/045835
Publication Date: Fri Jul 06 01:59:59 CEST 2018 International Filing Date: Thu Dec 21 00:59:59 CET 2017
IPC: F16L 11/11
B32B 1/08
F16L 9/12
Inventors: MITSUHASHI, Kohei
三觜 浩平
A composite tube having: a tubular tube body that is formed from a resin material; a covering layer that is tubular, covers an outer circumference of the tube body, can contract in the axial direction while being guided by the outer circumference of the tube body, is formed from a resin material, and is a bellows shape in which annular peak sections and annular valley sections are alternately formed in an axial direction of the tube body, said peak sections protruding toward a radially outward side and said valley sections being recesses on the radially outward side; and a porous resin layer that is positioned between the tube body and the covering layer, has compressed clamped sections, said compressed clamped sections being compressed and clamped between the valley sections and the tube body, and has a repellent force in a radial direction at the compressed clamped sections of 21N/cm2 or greater and 30N/cm2 or less.