Representative examples of the sort III are, as an example, Teflon FEP160 commercially accessible from DUPONT-MITSUI FLUORO CHEMICALS CO., LTD., and the like. Representative examples of the polyoxymethylene are, as an illustration, DELRIN commercially accessible from Du Pont, Celcon commercially accessible from Hoechst Celanese, and the like. As is evident from the results proven in Tables 1 to 4, the management cables of the present invention produced in Examples are wonderful in initial load effectivity and cargo effectivity after the operation was carried out 1,000,000 times as compared with the management cables produced in Comparative Examples when both the sort of the thermoplastic resin used in the liner in Examples and that in Comparative Examples are the identical. The polybutylene terephthalate also has a characteristic that the distinction of the preliminary load efficiency and the load efficiency after the management cable is operated for a protracted time period is small. When the content of the organopolysiloxane is lower than 13% by weight, the load effectivity is lowered when the control cable is used for a long time frame. Also, since a liner containing a particular organopolysiloxane is used within the management cable of the current invention, wonderful load effectivity is continued for a protracted period of time.

As mentioned above, for the reason that control cable of the current invention doesn't necessitate a lubricant, a problem concerning workability for coating a lubricant is solved and irregurality of load effectivity of merchandise due to the uneveness of coating shouldn't be generated. FIG. 1 is a partially-lower-off perspective view exhibiting one embodiment of the pull type management cable of the current invention. The inside cable 1 was gone there and again 60 strokes per one minute. Also, when the melt index is just too giant, the polybutylene terephthalate lacks toughness and cracks are generated in the inner coat, and the liner is commonly broken when the inside coat is rapidly bent within the assembling means of a control cable. Accordingly, it's preferable that the melt index is 0.5 to 5 g/10 minutes. Accordingly, it's preferable that the melt index is at most 5 g/10 minutes. When the melt index is greater than 5 g/10 minutes, there is a tendency that oil resistance, stress cracking resistance and abrasion resistance deteriorate.

The polyoxymethylene is great in abrasion resistance and has a low abrasion coefficiency. Also, it may be seen that the management cable produced in Comparative Examples, in which organopolysiloxane was contained only in the thermoplastic resin of the interior coat, has low durability. The polybutylene terephthalate is superb in thermal resistance, oil resistance and abrasion resistance, and has a low coefficient of friction. The type II has a polymerization degree larger than the sort I, and is great in stress-cracking resistance. The smaller the melt index of the polybutylene terephthalate is, the better the sturdiness resembling abrasion resistance and stress-cracking resistance is, nevertheless it tends to be troublesome for finishing up the extrusion molding. Among the many thermoplastic resins used within the interior coat, polybutylene terephthalate, high density polyethylene, polyoxymethylene and polyphenylene-sulfide are particularly preferable as a result of these are glorious in abrasion resistance. Further, it can be seen that the management cable produced in Example 5, through which organopolysiloxane was dispersively contained in thermoplastic resins of each the liner and the interior coat, has physical properties nearly equal to the management cables produced in different Examples, during which organopolysiloxane was dispersively contained solely within the thermoplastic resin of the liner.

A thermoplastic resin shown in Tables 1 to four was heated to melt, and the organopolysiloxane obtained within the above was added thereto in a proportion shown in Tables 1 to 4. After they were uniformly kneaded, shield control cable a liner having an inside diameter of 4.6 mm and an outside diameter of 5.6 mm was molded. The outside of the armor 5 is covered with the protecting layer 6 having a thickness of 0.7 mm. Within the protective layer 6, numerous materials conventionally recognized akin to polypropylene and polyvinyl chloride can be used. Next, the liner was inserted into a conduit having a protective layer fabricated from polypropylene of 0.7 mm in thickness on the skin floor of a springy armor layer having an outside diameter of 8.6 mm. The conduit 2 is composed of an armor layer 5 and a protecting layer 6 of a synthetic resin reminiscent of polypropylene. Also, as a resin of the interior coat, a thermoplastic resin during which the above-talked about organopolysiloxane is dispersively contained may be utilized in the identical means as in the above-mentioned liner. Examples of the thermoplastic resin are, for instance, polybutylene terephthalate, excessive density polyethylene, polyoxymethylene, a fluorocarbon resin represented by polytetrafluoroethylene, a polyamide represented by 6,6-nylon, polyphenylene sulfide, and the like, but the current invention isn't limited by the exemplified ones.