| 摘要 |
<p>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).</p> |
