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However, when a organopolysiloxane having too low a viscosity is contained in a big quantity in the resin, there is an issue that the organopolysiloxane cannot be effectively extruded to provide 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 is extra that 20% by weight, an extruded product can't be produced because a slip of a resin occurs on a cylinder barrel in an extruder and the fixed feed of the resin cannot be carried out. The present invention pertains to a management cable, and extra notably to a management cable excellent in load efficiency, and the inside cable of which with the ability to be smoothly operated for a long time period. When the content of the organopolysiloxane having an ultra-high viscosity is greater than 85% by weight and the content material of the organopolysiloxane having a decrease viscosity is less that 15% by weight, the results don't differ much from the results when the organopolysiloxane having an extremely-excessive viscosity is used solely, and the development of load effectivity is little.

See mods for extra information. When the content material of the organopolysiloxane having an ultra-high viscosity is much less that 45% by weight and the content of the organopolysiloxane having a lower viscosity is extra that 55% by weight, an extruded product cannot 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. When the content of the organopolysiloxane is lower than 13% by weight, the load effectivity is lowered when the management cable is used for a long time frame. Examples of the above-talked about polybutylene terephthalate are, as an example, a homopolymer of butylene terephthalate, a copolymer of butylene terephthalate and other monomer such as ethylene terephthalate having a content material of the opposite monomer of at most about 10% by weight, and the like. Also, the above-mentioned polybutylene terephthalate might contain a polymer resembling polyester or polyether-ester within a scope that the object of the present invention shouldn't be inhibited in the present invention. Examples of the thermoplastic resin used within the above-mentioned liner are, for example, polybutylene terephthalate, polyoxymethylene, polyamide represented by 1-nylon and 6,6-nylon, and the like, however the current invention will not be restricted to the exemplified ones and other thermoplastic resins can be utilized so far as the item of the present invention may be accomplished.

As a material used in the liner, for instance, a artificial resin corresponding to polyethylene, polyoxymethylene, polybutylene terephthalate or polytetrafluoroethylene is used. Within the above-talked about liner, a thermoplastic resin containing 13 to 20% by weight of an dispersed in the resin, is used. In the current invention, a thermoplastic resin is used within the inner coat which is formed on the surface of an internal cable. So as to enhance the load efficiency of a management cable with out a lubricant, an organopolysiloxane is contained in a resin for a liner or an inside coat, and the organopolysiloxane extides from on the surface of the resin. As is obvious from the results proven in Tables 1 to 4, the management cables of the present invention produced in Examples are glorious in initial load effectivity and load efficiency after the operation was carried out 1,000,000 times compared with the management cables produced in Comparative Examples when each the kind of the thermoplastic resin used in the liner in Examples and that in Comparative Examples are the same. However, there are a number of issues, in the management cable in which a lubricant is used, such as difficulty of operation for coating as a result of dispersion of the load efficiency of merchandise is attributable to the unevenness of a coating, rubbishes and dusts are easily adhered to the lubricant when applying the lubricant to the management cable, and drip and the like are generated.

Among the above-mentioned thermoplastic resins, polybutylene terephthalate having a melt index of 0.1 to 5 g/10 minutes might be notably preferably used as a result of the change of load efficiency is small when the control cable is used for a protracted period of time. The polybutylene terephthalate also has a characteristic that the difference of the preliminary load efficiency and the load efficiency after the control cable is operated for an extended time period is small. When the melt index of the polybutylene terephthalate is less than 0.1 g/10 minutes, it's difficult to provide a liner via an extruder, and when the melt index exceeds 5 g/10 minutes, there is 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 resembling sturdiness and abrasion resistance required for the liner aren't simply exhibited. Also, the durability of the above-mentioned management cable largely relies upon upon the lubricant. However, when the viscosity of the organopolysiloxane is too high, the amount of the organopolysiloxane which is extided from the floor of the resin is little, and according the load effectivity and sturdiness of the management cable can't be improved sufficiently.

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