As mentioned above, since the management cable of the current invention does not necessitate a lubricant, a problem regarding workability for coating a lubricant is solved and irregurality of load effectivity of products due to the uneveness of coating is just not generated. However, there are a number of issues, within the control cable during which a lubricant is used, equivalent to problem of operation for coating because dispersion of the load effectivity of products is attributable to the unevenness of a coating, rubbishes and dusts are easily adhered to the lubricant when making use of the lubricant to the management cable, shield control cable and drip and the like are generated. As an example, in case the shortage of lubricants is generated as a result of lengthy interval use of the management cable, there are some issues that the liner is totally worn down and the operationability of the management cable is excessively lowered, and the like. When the particle dimension of the powder is lower than 5 .mu.m, a pinholl is definitely generated as a result of the powder is agglomerated. With respect to Examples 12 to 15 and Comparative Examples 12 to 14, in accordance with a paste-extrusion method, 18 parts by weight of kerosene was added to a hundred elements by weight of polytetrafluoroethylene powder (average particle measurement 25 .mu.m) and kneaded to offer paste, and the paste was extruded below excessive stress to give a tube.

When the paste-extrusion technique is employed, it is preferable that paste is ready by adding kerosene to polytetrafluoroethylene powder and kneading them, the paste is extruded to give a tube below excessive stress and a stranded steel wire is coated with the tube, and after that, the stranded steel wire is dried and baked in a furnace equivalent to an electric furnace. When the content is more that 20% by weight, an extruded product cannot be produced because a slip of a resin happens on a cylinder barrel in an extruder and the constant feed of the resin can't be carried out. However, when a organopolysiloxane having too low a viscosity is contained in a large amount in the resin, there is a problem that the organopolysiloxane can't be effectively extruded to produce a liner, and thus the molding cannot be carried out because of the slipping of the resin on the cylinder barrel in the extruder. When the content material of the organopolysiloxane having an extremely-high viscosity is less that 45% by weight and the content of the organopolysiloxane having a decrease viscosity is extra that 55% by weight, an extruded product cannot be produced because a slide between a screw and a resin occurs in an extruder and the feed of the resin can't be carried out.

In the current invention, since the organopolysiloxane having an ultra-high viscosity and the organopolysiloxane having a decrease viscosity are dispersively contained in the thermoplastic resin used within the above-talked about liner, it is after all that there is no such thing as a necessity to make use of a lubricant between the interspace of the conduit and the internal cable, and a superb operate that the sliding operation of the conduit and the interior cable can be easily carried out for an extended time frame, is exhibited. Also, the durability of the above-talked about control cable largely relies upon upon the lubricant. The item of the present invention is to delete the above-mentioned disadvantages of typical control cables and to provide a management cable which does not necessitate a lubricant to keep away from a fancy coating operation and which can be utilized with smooth sliding operation of the interior cable for a protracted period of time. Among the above-talked about thermoplastic resins, polybutylene terephthalate having a melt index of 0.1 to 5 g/10 minutes could be notably preferably used because the change of load efficiency is small when the management cable is used for an extended time period.

Accordingly, it is preferable that the melt index is at least 0.1 g/10 minutes. Accordingly, an organopolysiloxane having an extremely-high viscosity and an organopolysiloxane having a lower viscosity are used in the present invention so as to enhance extruding stability throughout producing a liner and to sufficiently launch these organopolysiloxanes on the surface of the resin sufficiently. Accordingly, when an interior coat is produced from the polytetrafluoroethylene, so-called a paste-extrusion technique is employed. The conduit includes, as an illustration, a coiled spring produced by winding one or plural flat steel wires or spherical steel wires in abutting convolutions and an outer coat made from a artificial resin which covers the skin surface of the coiled spring. The internal cable often contains a stranded wire produced by twisting plural metallic wires or a stranded wire of which surroundings are coated with a artificial resin or reinforced by twisting flat steel wires across the stranded wire.