| 摘要 |
In the manufacture of a tube for lining pipelines and sewer systems from fiber m aterials which can be impregnated with a curable resin, the margins (6a, 6b) of fiber strips (6 , 19) on the circumference of the tube are provided with at least one tightly bonded overlap area (7a, 7b) running lengthwise. To achieve a stable and elastic foreproduct for impregnation with resin, a) elastically expandable fiber materials are used for the fiber strips (6, 19), b) the margins (6a, 6b) of the fiber strips (6, 19) are bonded irreversibly to o ne another by a thermal process, by either b1) placing a curable resin between the margins (6a, 6b) and curing it by actini c radiation, or b2) the fiber materials are bonded to one another in the overlap area (7a, 7b) b y superficial fusion and pressure. In this case the fiber materials have different melting temperatures on opposite faces and are heated at their surfaces in conta ct to a temperature that is between the melting temperatures of the two fiber materials. |
