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Title:
COMPOSITE TUBE
Document Type and Number:
WIPO Patent Application WO/2018/123779
Kind Code:
A1
Abstract:
A composite tube having: a tubular tube body; and 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, includes polyethylene as a primary component, has a density of 915kg/m3 or greater and 940kg/m3 or less, 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.

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Inventors:
MITSUHASHI KOHEI (JP)
Application Number:
PCT/JP2017/045833
Publication Date:
July 05, 2018
Filing Date:
December 20, 2017
Export Citation:
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Assignee:
BRIDGESTONE CORP (JP)
International Classes:
F16L11/11; B32B1/08; F16L9/12
Domestic Patent References:
WO2004039574A22004-05-13
WO2017213007A12017-12-14
Foreign References:
JP2004322583A2004-11-18
JP2015199511A2015-11-12
JP2016188305A2016-11-04
JP2002106759A2002-04-10
JP2004044780A2004-02-12
JP2007139043A2007-06-07
JPH11503217A1999-03-23
DE4128654A11993-03-04
JP2015048909A2015-03-16
JP2016251954A2016-12-26
Other References:
See also references of EP 3575657A4
Attorney, Agent or Firm:
TAIYO, NAKAJIMA & KATO (JP)
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