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The present invention relates to a control cable, and extra notably to a control cable glorious in load effectivity, and the interior cable of which having the ability to be easily operated for an extended time frame. Among the above-talked about thermoplastic resins, polybutylene terephthalate having a melt index of 0.1 to 5 g/10 minutes may be significantly preferably used because the change of load efficiency is small when the control cable is used for an extended time period. In the present invention, since the organopolysiloxane having an extremely-high viscosity and the organopolysiloxane having a decrease viscosity are dispersively contained in the thermoplastic resin used in the above-mentioned liner, it is after all that there is no necessity to use a lubricant between the interspace of the conduit and the inner cable, and an excellent operate that the sliding operation of the conduit and the internal cable might be easily carried out for a long time period, is exhibited. Alternatively, a considerable amount of the organopolysiloxane having a high viscosity can be contained in the resin, and the molding can be carried out without slipping.

When the kinematic viscosity exceeds 10000 cSt, the organopolysiloxane doesn't bleed out from the thermoplastic resin sufficiently, and the load efficiency is lowered. However, when a organopolysiloxane having too low a viscosity is contained in a big quantity within the resin, there is an issue that the organopolysiloxane can't be effectively extruded to supply a liner, and thus the molding can't be carried out due to the slipping of the resin on the cylinder barrel in the extruder. The quantities of the organopolysiloxane having an ultra-high viscosity and the organopolysiloxane having a lower viscosity contained in the thermoplastic resin of the above-mentioned liner are adjusted in order that the organopolysiloxane is composed of forty five to 85% by weight of the organopolysiloxane having an extremely-excessive viscosity and 55 to 15% by weight of the organopolysiloxane having a decrease viscosity. For example, a method comprising ading the organopolysiloxane having an ultra-high viscosity and the organopolysiloxane having a decrease viscosity individually to the thermoplastic resin while heating and kneading the thermoplastic resin and uniformly dispersing them, a method comprising adding the organopolysiloxane, which is beforehand ready by mixing the organopolysiloxane having an extremely-excessive viscosity and the organopolysiloxane having a decrease viscosity in a prescribed proportion, to the melted thermoplastic resin and uniformly dispersing them, and the like could be exemplified.

To the organopolysiloxane, for example, an antioxidant, a corrosion inhibitor, excessive pressure additives and the like might be added as occasion calls for. As the above-talked about organopolysiloxane having an ultra-high viscosity, a linear organopolysiloxane, a branched organopolysiloxane and the like can be exemplified. In order to enhance the load effectivity of a management cable with out a lubricant, an organopolysiloxane is contained in a resin for a liner or an interior coat, and the organopolysiloxane extides from on the surface of the resin. However, there are a number of issues, within the control cable by which a lubricant is used, corresponding to issue of operation for coating as a result of dispersion of the load efficiency of products is caused by the unevenness of a coating, rubbishes and dusts are simply adhered to the lubricant when applying the lubricant to the control cable, and drip and the like are generated. However, when the viscosity of the organopolysiloxane is just too excessive, the amount of the organopolysiloxane which is extided from the surface of the resin is little, and according the load efficiency and sturdiness of the control cable cannot be improved sufficiently.

However, in such a management cable, frictional resistance will increase when the conduit is directly contacted with the interior cable. The polyoxymethylene also has properties corresponding to low stickslip beneath a high load and improves the operationability of a control cable. When the melt index of the polybutylene terephthalate is less than 0.1 g/10 minutes, it is troublesome 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 because of the lack of toughness of the liner throughout forming the liner and that bodily properties reminiscent of durability and abrasion resistance required for the liner are not simply exhibited. As a material used within the liner, for instance, a artificial resin such as polyethylene, polyoxymethylene, polybutylene terephthalate or polytetrafluoroethylene is used. Examples of the thermoplastic resin used in the above-talked about liner are, for instance, polybutylene terephthalate, polyoxymethylene, polyamide represented by 1-nylon and 6,6-nylon, and the like, however the present invention is just not restricted to the exemplified ones and other thermoplastic resins can be used as far as the thing of the current invention might be accomplished.

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