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The management cable of the present invention comprises a conduit having flexibility, inside surface of which being fitted with a liner, and an internal cable having an inner coat, which is inserted into the conduit in order that the interior cable free slides in the conduit. As an example, in case the scarcity of lubricants is generated due to the lengthy period use of the control cable, there are some problems that the liner is totally worn down and the operationability of the control cable is excessively lowered, and the like. In the present invention, for the reason that organopolysiloxane having an extremely-high viscosity and the organopolysiloxane having a lower viscosity are dispersively contained within the thermoplastic resin used in the above-mentioned liner, it's of course that there isn't any necessity to make use of a lubricant between the interspace of the conduit and the inside cable, and a wonderful perform that the sliding operation of the conduit and the inner cable will be easily carried out for a protracted time period, is exhibited. When the kinematic viscosity exceeds 10000 cSt, the organopolysiloxane does not bleed out from the thermoplastic resin sufficiently, and the load effectivity is lowered. When the kinematic viscosity is lower than 25 cSt, the organopolysiloxane having a decrease viscosity is evaporated in a short while, and the put on and tear of the liner are generated in the course of the management cable is used.

The object of the present invention is to delete the above-mentioned disadvantages of typical management cables and to provide a management cable which does not necessitate a lubricant to keep away from a posh coating operation and which can be used with clean sliding operation of the internal cable for an extended period of time. FIG. 1 is a partially-reduce-off perspective view showing one embodiment of the control cable of the present invention. When the content material of the organopolysiloxane is lower than 13% by weight, shield control cable the load efficiency is lowered when the management cable is used for an extended time period. The representative examples of the organopolysiloxane having a decrease viscosity are, for example, dimethylpolysiloxane, methylalkylpolysiloxane, methylphenylpolysiloxane, methylaminoalkylpolysiloxane, methylfluoroalkylpolysiloxane, and the like. The everyday examples are, for instance, dimethylpolysiloxane, methylalkylpolysiloxane, methylphenylpolysiloxane, methylaminoalkylpolysiloxane, methylfluoroalkylpolysiloxane, and the like. Representative examples of the sort II are, as an example, Teflon (Registered Trademark) PFA 340-J commercially obtainable from DUPONT-MITSUI FLUORO CHEMICALS CO., LTD., and the like.

The control cable has been conventionally used with a view to function a transmission used in vehicles, autobicycles, bicycles and the like, a brake, a clutch, a speedmeter, and the like. FIG. 2 is an illustrative view of an apparatus for measuring the properties of the management cable of the present invention. When the melt index of the polybutylene terephthalate is less than 0.1 g/10 minutes, it's tough to supply a liner by the use of an extruder, and when the melt index exceeds 5 g/10 minutes, there is a tendency that the liner is well peeled off from the conduit due to the lack of toughness of the liner during forming the liner and that bodily properties equivalent to durability and abrasion resistance required for the liner usually are not easily exhibited. However, there are a number of issues, in the control cable by which a lubricant is used, reminiscent of difficulty of operation for coating because dispersion of the load efficiency of products is caused by the unevenness of a coating, rubbishes and dusts are easily adhered to the lubricant when making use of the lubricant to the management cable, and drip and the like are generated.

However, when a organopolysiloxane having too low a viscosity is contained in a large quantity within the resin, there may be a problem that the organopolysiloxane can't be effectively extruded to provide a liner, and thus the molding cannot be carried out due to the slipping of the resin on the cylinder barrel in the extruder. When the content is extra that 20% by weight, an extruded product cannot be produced as a result of a slip of a resin occurs on a cylinder barrel in an extruder and the constant feed of the resin cannot be carried out. When the content of the organopolysiloxane having an extremely-high viscosity is less that 45% by weight and the content of the organopolysiloxane having a lower viscosity is more that 55% by weight, an extruded product can't be produced as a result of a slide between a screw and a resin happens in an extruder and the feed of the resin cannot be carried out. Out of the entire number of rods, forty ones are used for energy distribution control by means of the hight of the lively zone of the reactor. However, when the viscosity of the organopolysiloxane is just too excessive, the quantity of the organopolysiloxane which is extided from the surface of the resin is little, and according the load effectivity and sturdiness of the management cable can't be improved sufficiently.