The entire Guide To Understanding Shield Control Cable > 자유게시판

However, when a organopolysiloxane having too low a viscosity is contained in a big quantity within the resin, there may be an issue that the organopolysiloxane can't be successfully extruded to provide a liner, and thus the molding cannot be carried out due to the slipping of the resin on the cylinder barrel within the extruder. When the melt index of the polybutylene terephthalate is lower than 0.1 g/10 minutes, it's difficult to supply a liner by the use of an extruder, and when the melt index exceeds 5 g/10 minutes, there's a tendency that the liner is easily peeled off from the conduit as a result of lack of toughness of the liner throughout forming the liner and that physical properties similar to durability and abrasion resistance required for the liner should not easily exhibited. Among the many above-mentioned thermoplastic resins, polybutylene terephthalate having a melt index of 0.1 to 5 g/10 minutes can be particularly preferably used because the change of load effectivity is small when the management cable is used for a protracted period of time.

In the current invention, for the reason that organopolysiloxane having an extremely-excessive viscosity and the organopolysiloxane having a decrease viscosity are dispersively contained in the thermoplastic resin used within the above-mentioned liner, it is of course that there is no necessity to use a lubricant between the interspace of the conduit and the internal cable, and an excellent operate that the sliding operation of the conduit and the inside cable will be smoothly carried out for an extended time frame, is exhibited. Because the above-mentioned organopolysiloxane having an extremely-excessive viscosity, a linear organopolysiloxane, a branched organopolysiloxane and the like will be exemplified. It is especially preferable that the content material of the organopolysiloxane having an extremely-high viscosity is 50 to 80% by weight and the content of the organopolysiloxane having a decrease viscosity is 50 to 20% by weight. Accordingly, an organopolysiloxane having an ultra-excessive viscosity and an organopolysiloxane having a decrease viscosity are utilized in the present invention in order to improve extruding stability throughout producing a liner and to sufficiently launch these organopolysiloxanes on the surface of the resin sufficiently.

Among them, dimethylpolysiloxane is particularly preferable from the viewpoint of lubricationability between the thermoplastic resin of the liner and that of the inside coat, thermal resistance, value, and the like. In FIG. 1, 1 denotes an inside cable, 2 denotes a conduit, 3 denotes an internal coat, and 4 denotes a liner. The quantities of the organopolysiloxane having an ultra-excessive viscosity and the organopolysiloxane having a lower viscosity contained within the thermoplastic resin of the above-talked about liner are adjusted in order that the organopolysiloxane is composed of 45 to 85% by weight of the organopolysiloxane having an ultra-excessive viscosity and 55 to 15% by weight of the organopolysiloxane having a lower viscosity. When the content material of the organopolysiloxane having an extremely-high viscosity is more than 85% by weight and the content of the organopolysiloxane having a lower viscosity is less that 15% by weight, the effects do not differ much from the results when the organopolysiloxane having an ultra-excessive viscosity is used solely, and the improvement of load effectivity is little. When the content material of the organopolysiloxane is less than 13% by weight, the load efficiency is lowered when the management cable is used for a long time period. The item of the current invention is to delete the above-mentioned disadvantages of typical management cables and to supply a management cable which does not necessitate a lubricant to avoid a complex coating operation and which can be utilized with clean sliding operation of the internal cable for an extended time period.

The management cable of the current invention comprises a conduit having flexibility, inside surface of which being fitted with a liner, and an interior cable having an interior coat, which is inserted into the conduit so that the internal cable free slides in the conduit. Also, as a resin of the internal coat, shield control cable a thermoplastic resin by which the above-mentioned organopolysiloxane is dispersively contained might be used in the same approach as in the above-mentioned liner. When the kinematic viscosity is less than 25 cSt, the organopolysiloxane having a lower viscosity is evaporated in a short while, and the wear and tear of the liner are generated through the control cable is used. The control cable of the present invention contains a conduit having flexibility, the inside floor of which being arrange with a liner and an inner cable having an inside coat, and the inner cable is inserted into the conduit so that the internal cable freely slides within the conduit as talked about above. Among them, dimethylpolysiloxane is particularly preferable from the viewpoint of lubricationability between the thermoplastic resin of the liner and that of the interior coat, thermal resistance, price and the like. As an example, in case the shortage of lubricants is generated as a result of long interval use of the control cable, there are some problems that the liner is totally worn down and the operationability of the control cable is excessively lowered, and the like.