| 摘要 |
A hose for lining pressure pipe lines is described comprising a web being made up of warp and woof threads, which are made of plastic, as well as a coating of thermoplastic material, which coating is impermeable to the medium to be transported in the pipe lines and is applied onto one side of the web. Due to the pressure of a fluid, the hose is introduced into a pipe line and turned up therewith, in which case a cement in the interior of the hose prior to turning-up will come between the outside of the hose and the inside wall of the pipe line. In order to, on the one hand, obtain high strength in the longitudinal direction and to, on the other hand, facilitate introduction of the hose into the pipe line, the stretching ability of the web, in the transverse direction of the hose, is greater by at least one third as compared to that in its longitudinal direction and, preferably, is at least twice as great. In the web, the proportion of the warp threads, advantageously, is >65 percent by weight and the proportion of the woof threads, advantageously, is <35 percent by weight. Furthermore, the warp threads may be smooth and the woof threads may be slightly textured, Preferably, a type of web is chosen with which the incorporation for the warp threads will be <2 percent and for the woof threads will be >12 percent.
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