자유게시판

Further, it can be seen that the control cable produced in Example 5, wherein organopolysiloxane was dispersively contained in thermoplastic resins of each the liner and the inner coat, has physical properties virtually equal to the control cables produced in other Examples, wherein organopolysiloxane was dispersively contained solely within the thermoplastic resin of the liner. The organopolysiloxane comprising the organopolysiloxane having an extremely-excessive viscosity and the organopolysiloxane having a lower viscosity is dispersively contained in the thermoplastic resin in order that the content material of the organopolysiloxane is 13 to 20% by weight. As is clear from the results shown in Tables 1 to 4, the control cables of the present invention produced in Examples are excellent in initial load effectivity and cargo effectivity after the operation was carried out 1,000,000 times as compared with the control cables produced in Comparative Examples when each the form of the thermoplastic resin used in the liner in Examples and that in Comparative Examples are the same.

In FIG. 1, 1 denotes an inner cable, 2 denotes a conduit, three denotes an inside coat, and four denotes a liner. FIG. 1 is a partially-lower-off perspective view showing one embodiment of the pull sort management cable of the current invention. As mentioned above, because the management cable of the present invention doesn't necessitate a lubricant, a problem regarding workability for coating a lubricant is solved and irregurality of load effectivity of products because of the uneveness of coating will not be generated. Among them, polyoxymethylene is preferably utilized in the present invention because a stickslip is hardly generated when polyoxymethylene is used. The polyphenylene-sulfide is divided broadly into two teams of a crosslinked prepolymer and a linear prepolymer, and these could be used in the present invention. The tetrafluoroethylene-perfluoroalkylvinyl ether copolymer is prescribed in ASTM D 3307, and has two types, i.e. Type I and sort II. Among them, polytetrafluoroethylene, tetrafluoroethyleneperfluoroalkylvinyl ether copolymer and tetrafluoroethylene-hexafluoroethylene copolymer, in particular, polytetrafluoroethylene are preferably used as a result of they're glorious in thermal resistance, load effectivity and adaptability.

Accordingly, when an inside coat is produced from the polytetrafluoroethylene, so-referred to as a paste-extrusion methodology is employed. Examples of the thermoplastic resin are, as an 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, however the current invention shouldn't be limited by the exemplified ones. When the melt index of the high density polyethylene is less than 0.01 g/10 minutes, the extrusion molding becomes tough, and there's a tendency that the internal coat cannot be fastened on a stranded steel wire. The high density polyethylene has a density of at the least 0.Ninety five g/cm.sup.3. It is preferable that the elastomer has an capacity 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 no less than 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 material: 12% y weight), a hydrogenated styrenebutadience copolymer (TUFTEC M 1913 commercially out there from Asahi Chemical Industry Co., Ltd.), an ethylene-propylene copolymer (TAFMER PO 680 commercially out there from MITSUI PETRO CHEMICAL INDUSTRIES, LTD.), and the like.

Accordingly, it is preferable that the melt index is not less than 0.1 g/10 minutes. The smaller the melt index of the polybutylene terephthalate is, the larger the sturdiness equivalent to abrasion resistance and stress-cracking resistance is, however it tends to be troublesome for carrying out the extrusion molding. Accordingly, it's preferable that the melt index is 0.5 to 5 g/10 minutes. Although melt viscosity of the kind II is 6 to 7 instances larger than that of the sort I, the sort II is appropriate for makes use of necessitating sturdiness because the kind II may be employed in an extrusion molding. In the protective layer 6, numerous materials conventionally identified akin to polypropylene and polyvinyl chloride can be used. The skin of the armor 5 is coated with the protecting layer 6 having a thickness of 0.7 mm. Next, the liner was inserted right into a conduit having a protective layer product of polypropylene of 0.7 mm in thickness on the surface surface of a springy armor layer having an out of doors diameter of 8.6 mm.

If you adored this article and also you would like to collect more info with regards to shield control cable please visit the internet site.