| 摘要 |
A cable protection conduit has internal, axially non-parallel grooves and external projections for connecting adjacent conduits. The conduit is mfd. in two or more coaxial layers of different materials, at least one containing an electrically conducting or magnetic filler. The inner layer is a fluorinated polymer. The extrusion head has a mandrel (7) with a rotating toothed die (5) at the outer end. Polymer is fed to the die via at least two side entry ports (1,2,3). USE/ADVANTAGE - The conduit is used to protect electrical cable, optical fibres, etc. The extrusion head design allows mfr. of the cable with coaxial layers. Has optimized properties and is inexpensive. |
