However, when a organopolysiloxane having too low a viscosity is contained in a large amount within the resin, there is a problem that the organopolysiloxane can't be effectively extruded to provide a liner, and thus the molding can't be carried out because of the slipping of the resin on the cylinder barrel in the extruder. When the melt index of the polybutylene terephthalate is less than 0.1 g/10 minutes, it's tough to provide a liner by means of an extruder, and when the melt index exceeds 5 g/10 minutes, there's a tendency that the liner is definitely peeled off from the conduit as a result of lack of toughness of the liner during forming the liner and that bodily properties corresponding to durability and abrasion resistance required for the liner are usually not easily exhibited. Among the many above-mentioned thermoplastic resins, polybutylene terephthalate having a melt index of 0.1 to 5 g/10 minutes can be significantly preferably used because the change of load effectivity is small when the control cable is used for a protracted period of time.

In the current invention, because the organopolysiloxane having an ultra-high viscosity and the organopolysiloxane having a decrease viscosity are dispersively contained within the thermoplastic resin used in the above-mentioned liner, it is in fact that there is no such thing as a necessity to use a lubricant between the interspace of the conduit and the interior cable, and an excellent operate that the sliding operation of the conduit and the internal cable may be smoothly carried out for an extended time frame, is exhibited. Because the above-mentioned organopolysiloxane having an extremely-excessive viscosity, a linear organopolysiloxane, a branched organopolysiloxane and the like might be exemplified. It is particularly preferable that the content material of the organopolysiloxane having an ultra-excessive viscosity is 50 to 80% by weight and the content material of the organopolysiloxane having a lower viscosity is 50 to 20% by weight. Accordingly, an organopolysiloxane having an extremely-excessive viscosity and an organopolysiloxane having a lower viscosity are used in the present invention in order to improve extruding stability throughout producing a liner and to sufficiently release these organopolysiloxanes on the surface of the resin sufficiently.

Among them, dimethylpolysiloxane is especially preferable from the viewpoint of lubricationability between the thermoplastic resin of the liner and that of the internal coat, thermal resistance, price, and the like. In FIG. 1, 1 denotes an inside cable, 2 denotes a conduit, 3 denotes an inside coat, and four denotes a liner. The amounts of the organopolysiloxane having an ultra-excessive viscosity and the organopolysiloxane having a decrease viscosity contained within the thermoplastic resin of the above-talked about liner are adjusted so that the organopolysiloxane is composed of forty five to 85% by weight of the organopolysiloxane having an extremely-excessive viscosity and fifty five to 15% by weight of the organopolysiloxane having a decrease viscosity. When the content of the organopolysiloxane having an ultra-high viscosity is more than 85% by weight and the content of the organopolysiloxane having a lower viscosity is much less that 15% by weight, the results do not differ much from the results when the organopolysiloxane having an ultra-high viscosity is used solely, and the improvement of load efficiency is little. When the content of the organopolysiloxane is less than 13% by weight, the load effectivity is lowered when the control cable is used for a long time frame. The object of the current invention is to delete the above-mentioned disadvantages of standard control cables and to offer a management cable which does not necessitate a lubricant to avoid a fancy coating operation and which can be used with easy sliding operation of the internal cable for a long period of time.

The management cable of the present invention includes a conduit having flexibility, inside floor of which being fitted with a liner, and an interior cable having an internal coat, which is inserted into the conduit in order that the inside cable free slides in the conduit. Also, as a resin of the inner coat, shield control cable a thermoplastic resin through which the above-talked about organopolysiloxane is dispersively contained might be utilized in the identical method as within the above-mentioned liner. When the kinematic viscosity is lower than 25 cSt, the organopolysiloxane having a lower viscosity is evaporated in a short time, and the put on and tear of the liner are generated in the course of the control cable is used. The management cable of the present invention includes a conduit having flexibility, the inside floor of which being set up with a liner and an internal cable having an inner coat, and the inside cable is inserted into the conduit so that the inner cable freely slides within the conduit as talked about above. Among them, dimethylpolysiloxane is especially preferable from the viewpoint of lubricationability between the thermoplastic resin of the liner and that of the interior coat, thermal resistance, cost and the like. For example, in case the shortage of lubricants is generated as a result of long period use of the management cable, there are some issues that the liner is completely worn down and the operationability of the control cable is excessively lowered, and the like.