Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
形状記憶特性を有する樹脂管及びその樹脂管を用いた内面樹脂ライニング鋼管
Document Type and Number:
Japanese Patent JP4487591
Kind Code:
B2
Abstract:

To provide resin tube having shape memory properties and a method for manufacturing the same, which improve productivity of a lining process without a problem of productivity drop in a process giving shape memory properties on the resin tube when lining of the resin tube is applied on steel tube inner surface, and also to provide an inner surface resin lining steel tube using the resin tube having shape memory properties.

The resin tube having shape memory properties has radial expansion rate Rd defined as below of 1% or greater and 30% or less, axial contraction rate Rl defined as below of 30% or less, and ratio Rd/Rl of the radial expansion rate Rd and the axial contraction rate Rl of 0.8 or greater when the same is heated to a predetermined shape memory property setting temperature and is retained for 60 second. Rd=(da-ds)/da×100, Rl=(La-Ls)/La×100 where, ds: the outer diameter of the resin tube before heating, da: the outer diameter of the resin tube after 60 second retention at shape memory property setting temperature, Ls: the length of the resin tube before heating, La: the length of the resin tube after 60 second retention at shape memory property setting temperature.

COPYRIGHT: (C)2005,JPO&NCIPI


Inventors:
西野 克彦
三坂 望
和田 英之
金子 雅仁
Application Number:
JP2004049035A
Publication Date:
June 23, 2010
Filing Date:
February 25, 2004
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
JFEスチール株式会社
International Classes:
F16L9/12; B29C48/32; B29C48/90; B29C61/06; B29C63/34; B29C63/42; F16L9/14; B29L23/00
Domestic Patent References:
JP2001310389A
JP2002234067A
Attorney, Agent or Firm:
落合 憲一郎
森 和弘