| 摘要 |
<p>PURPOSE:To obtain lining material for reverse lining by a method wherein resin pipe, which is made of shape memory resin so as to have an outer diameter larger than the inner diameter of existing tube, is softened in the heating atmosphere, the temperature of which is higher than the shape restoring temperature and lower than the shape memory temperature of the resin, and flattened and, after that, inserted in film tube, which is made of material having thermal deformation temperature under load higher than the shape memory temperature of the resin, and finally reeled up or folded up for producing the lining material concerned. CONSTITUTION:While being softened in the heating atmosphere, the temperature of which is lower than the shape restoring temperature of resin pipe 1, the resin pipe 1 is flattened mechanically so as to make its cross-section smaller than the cross-section of a existing tube in order to form a worked pipe 1a, 1b or 1c. After that, the worked pipe 1a held under its softened state is inserted in film tube, the thermal deformation temperature under load of which is higher than the shape memory temperature of shape memory resin, so as to produce lining material 3. After being wound spirally or folded up, the lining material 3 is cooled down below its shape restoring temperature and stored. When the formation of synthetic resin pipe onto the inner surface of the existing tube by the worked lining material is intended, the tip of the lining material 3, the resin pipe 1 in which is turned under softened state, is passed through a feeding port 5 and a heat insulation hose 6 so as to fix to a fixing part 7 in such a manner that the film tube 2 is turned inside in order to turn the lining material 3 inside out by means of the pressure of pressurized water.</p> |
