CONDUIT REHABILITATION PIPE

WIPO Patent Application WO/2014/061788

A1

The purpose of the present invention is to not only ensure desired flat strength in a conduit rehabilitation pipe, but also to prevent tearing and wrinkling that may occur in a conduit rehabilitation pipe during drawing work. Provided is a conduit rehabilitation pipe characterized in comprising a lower-side soft resin layer (5d) constituting an inner layer of a straight pipe part (5b), an upper-side soft resin layer (5e) layered on the outer side of the lower-side soft resin layer (5d) and constituting an outer layer of the straight tube part, and a ridge part (5c) formed in a spiral shape on the outer surface of the upper-side soft resin layer (5e). The ridge part (5c) is composed of a core material (5g) made of hard resin wound in a spiral shape, and a core material coating part (5f) integrated with the upper-side soft resin layer (5e) in state enclosing the core material. The core material (5g) has a height that is 3.5% to 5% of the inside diameter of the straight pipe part (5b). The lower-side soft resin layer (5d) is formed by winding so as to include at least a single layer portion (5ds). The single layer portion (5ds) has a height that is 0.25% to 0.65% of the inside diameter of the straight pipe part (5b).

KANAO SHIGEKI (JP)

PCT/JP2013/078337

April 24, 2014

October 18, 2013

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KANAFLEX CORP (JP)

B32B1/08; F16L1/00; F16L11/11; F16L55/18

JP2012026524A	2012-02-09
JP2012026516A	2012-02-09
JP2006083608A	2006-03-30
JP2005003189A	2005-01-06
JPS60247544A	1985-12-07

SAMEJIMA, Mutsumi et al. (JP)
Mutsumi Sameshima (JP)

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