<br> Because the polyphenylene sulfide is mostly poor in elongation and flexibility as it is, it is preferable to use a polyphenylene sulfide containing 5 to 40% by weight of an elastomer. It is preferable that the elastomer has an means to be modified in order that a softened polyphenylene sulfide, which is ready by mixing with the elastomer and kneading them with melting, has a flexural modulus of at most 30000 (ASTM D 790) and a tensile elongation at break of a minimum of 5% (ASTM D 638). Representative examples of such an elastomer are, as an illustration, an olefin copolymer containing an epoxy group (ethylene content material: 88% by weight, glycidyl methacrylate content: 12% y weight), a hydrogenated styrenebutadience copolymer (TUFTEC M 1913 commercially available from Asahi Chemical Industry Co., Ltd.), an ethylene-propylene copolymer (TAFMER PO 680 commercially obtainable from MITSUI PETRO CHEMICAL INDUSTRIES, LTD.), and the like. As the polyphenylene sulfide which will be employed within the electrostatic coating technique of powder, both of the linear polyphenylene sulfide and the crosslinked polyphenylene sulfide can be utilized, and if a thin movie having a thickness of at most 0.1 mm could be formed, there is no such thing as a necessity to add an elastomer thereto. The tetrafluoroethylene perfluoroalkylvinyl ether copolymer and the tetrafluoroethylenepentafluoroproylene copolymer may be employed in an extrusion molding by heating to melt.<br>
<br> Accordingly, it is preferable that the melt index is at the least 0.1 g/10 minutes. Accordingly, it is preferable that the melt index is 0.5 to 5 g/10 minutes. The smaller the melt index of the polybutylene terephthalate is, the higher the sturdiness corresponding to abrasion resistance and stress-cracking resistance is, however it tends to be troublesome for carrying out the extrusion molding. When the melt index of the excessive density polyethylene is lower than 0.01 g/10 minutes, the extrusion molding turns into troublesome, and there's a tendency that the inner coat can't be fastened on a stranded steel wire. 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. When the melt index is greater than 5 g/10 minutes, there's a tendency that bending energy, impression resistance and abrasion resistance deteriorate. Accordingly, it is preferable that the melt index is at most 5 g/10 minutes. Also, when the melt index is just too giant, the polybutylene terephthalate lacks toughness and cracks are generated within the internal coat, and the liner is usually damaged when the internal coat is rapidly bent in the assembling means of a management cable.<br>
<br> The number of the strands used within the inner cable 1 and the variety of the steel wires used within the strand will not be notably restricted, and conventionally known various mixture thereof can be employed. Seven steel wires are twisted to obtain one strand, and seven strands are twisted to acquire a wire rope with 7.instances.7 development and an outside diameter of 3.Zero mm. When the paste-extrusion method is employed, it's preferable that paste is ready by including kerosene to polytetrafluoroethylene powder and kneading them, the paste is extruded to provide a tube underneath excessive pressure and a stranded steel wire is coated with the tube, and after that, the stranded steel wire is dried and baked in a furnace akin to an electric furnace. Among them, polytetrafluoroethylene, tetrafluoroethyleneperfluoroalkylvinyl ether copolymer and tetrafluoroethylene-hexafluoroethylene copolymer, particularly, polytetrafluoroethylene are preferably used as a result of they're glorious in thermal resistance, load effectivity and suppleness. Among them, shield control cable polyoxymethylene is preferably utilized in the present invention as a result of a stickslip is hardly generated when polyoxymethylene is used.<br>
<br> Representative examples of the polyoxymethylene are, for example, DELRIN commercially accessible from Du Pont, Celcon commercially obtainable from Hoechst Celanese, and the like. Examples of the thermoplastic resin are, for example, polybutylene terephthalate, high density polyethylene, polyoxymethylene, a fluorocarbon resin represented by polytetrafluoroethylene, a polyamide represented by 6,6-nylon, polyphenylene sulfide, and the like, but the present invention just isn't restricted by the exemplified ones. The high density polyethylene has wonderful physical properties corresponding to high load efficiency. Among the thermoplastic resins used within the internal coat, polybutylene terephthalate, excessive density polyethylene, polyoxymethylene and polyphenylene-sulfide are notably preferable because these are excellent in abrasion resistance. Hereinafter, the control cable of the present invention and the technical effect are defined in detail with evaluating some examples and comparative examples. As is evident from the results proven in Tables 1 to 4, the control cables of the present invention produced in Examples are glorious in initial load effectivity and load effectivity after the operation was carried out 1,000,000 occasions as compared with the control cables produced in Comparative Examples when both the type of the thermoplastic resin used in the liner in Examples and that in Comparative Examples are the same. If you want to see more info on Facebook check out the page. With respect to Examples 12 to 15 and Comparative Examples 12 to 14, in accordance with a paste-extrusion method, 18 parts by weight of kerosene was added to one hundred components by weight of polytetrafluoroethylene powder (average particle size 25 .mu.m) and kneaded to provide paste, and the paste was extruded under high stress to present a tube.<br>
