The complete Guide To Understanding Shield Control Cable > 자유게시판

However, when a organopolysiloxane having too low a viscosity is contained in a large quantity within the resin, there may be a problem 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 melt index of the polybutylene terephthalate is lower than 0.1 g/10 minutes, it's tough to produce a liner by way of an extruder, and when the melt index exceeds 5 g/10 minutes, there is 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 bodily properties resembling durability and abrasion resistance required for the liner usually are not easily exhibited. Among the many above-mentioned thermoplastic resins, polybutylene terephthalate having a melt index of 0.1 to 5 g/10 minutes could be particularly preferably used as a result of the change of load efficiency is small when the management cable is used for a long period of time.

In the present invention, since the organopolysiloxane having an ultra-high viscosity and the organopolysiloxane having a lower viscosity are dispersively contained within the thermoplastic resin used within the above-talked about liner, it's of course that there is no necessity to make use of 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 internal cable might be smoothly carried out for a long time frame, is exhibited. As the above-mentioned organopolysiloxane having an ultra-excessive viscosity, a linear organopolysiloxane, a branched organopolysiloxane and the like could be exemplified. It is especially preferable that the content material of the organopolysiloxane having an ultra-high viscosity is 50 to 80% by weight and the content of the organopolysiloxane having a lower viscosity is 50 to 20% by weight. Accordingly, an organopolysiloxane having an ultra-high viscosity and an organopolysiloxane having a decrease viscosity are used in the present invention so as to enhance extruding stability during producing a liner and to sufficiently release these organopolysiloxanes on the surface of the resin sufficiently.

Among them, dimethylpolysiloxane is especially preferable from the viewpoint of lubricationability between the thermoplastic resin of the liner and that of the inner coat, thermal resistance, price, and the like. In FIG. 1, 1 denotes an inner cable, 2 denotes a conduit, three denotes an inner coat, and four denotes a liner. The amounts of the organopolysiloxane having an extremely-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 forty five to 85% by weight of the organopolysiloxane having an ultra-high viscosity and 55 to 15% by weight of the organopolysiloxane having a lower viscosity. When the content of the organopolysiloxane having an ultra-excessive viscosity is greater than 85% by weight and the content of the organopolysiloxane having a decrease viscosity is much less that 15% by weight, the effects do not differ a lot from the results when the organopolysiloxane having an ultra-excessive viscosity is used solely, and the development of load effectivity is little. When the content material of the organopolysiloxane is less than 13% by weight, the load effectivity is lowered when the control cable is used for an extended period of time. The article of the present invention is to delete the above-talked about disadvantages of typical control cables and to supply a control cable which doesn't necessitate a lubricant to keep away from a posh coating operation and which can be utilized with clean sliding operation of the internal cable for a long period of time.

The management cable of the present invention contains a conduit having flexibility, inside floor of which being fitted with a liner, and an inner cable having an inside coat, which is inserted into the conduit so that the inside cable free slides within the conduit. Also, as a resin of the inner coat, shield control cable a thermoplastic resin wherein the above-talked about organopolysiloxane is dispersively contained could be utilized in the same way as in the above-talked about liner. When the kinematic viscosity is less than 25 cSt, the organopolysiloxane having a lower viscosity is evaporated in a short time, and the wear and tear of the liner are generated throughout the control cable is used. The management cable of the present invention includes a conduit having flexibility, the inside surface of which being arrange with a liner and an interior cable having an interior coat, and the internal cable is inserted into the conduit so that the inner cable freely slides in the conduit as talked about above. Among them, dimethylpolysiloxane is especially preferable from the viewpoint of lubricationability between the thermoplastic resin of the liner and that of the inner coat, thermal resistance, cost and the like. For example, in case the shortage of lubricants is generated as a result of lengthy period use of the management cable, there are some issues that the liner is thoroughly worn down and the operationability of the management cable is excessively lowered, and the like.