깝스토리 업체지원센터

The current invention pertains to a management cable, and extra notably to a control cable excellent in load effectivity, and the inside cable of which being able to be smoothly operated for a protracted time frame. Among the many above-talked about thermoplastic resins, polybutylene terephthalate having a melt index of 0.1 to 5 g/10 minutes could be particularly ideally used because the change of load efficiency is small when the control cable is used for a protracted time frame. In the present invention, since the organopolysiloxane having an ultra-excessive viscosity and the organopolysiloxane having a decrease viscosity are dispersively contained within the thermoplastic resin used in the above-mentioned liner, it is after all that there is no such thing as a necessity to make use of a lubricant between the interspace of the conduit and the internal cable, and a superb function that the sliding operation of the conduit and the inner cable might be easily carried out for an extended period of time, is exhibited. However, a considerable amount of the organopolysiloxane having a excessive viscosity may be contained in the resin, and the molding will be carried out with out slipping.

When the kinematic viscosity exceeds 10000 cSt, the organopolysiloxane doesn't bleed out from the thermoplastic resin sufficiently, and the load effectivity is lowered. However, when a organopolysiloxane having too low a viscosity is contained in a large quantity in the resin, there's an issue that the organopolysiloxane cannot be effectively extruded to supply a liner, and thus the molding can't be carried out due to the slipping of the resin on the cylinder barrel in the extruder. The amounts of the organopolysiloxane having an ultra-high viscosity and the organopolysiloxane having a lower viscosity contained in 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. For example, a technique comprising ading the organopolysiloxane having an extremely-high viscosity and the organopolysiloxane having a decrease viscosity separately to the thermoplastic resin while heating and kneading the thermoplastic resin and uniformly dispersing them, a technique comprising adding the organopolysiloxane, which is previously prepared by mixing the organopolysiloxane having an extremely-excessive viscosity and the organopolysiloxane having a lower viscosity in a prescribed proportion, to the melted thermoplastic resin and uniformly dispersing them, and the like could be exemplified.

To the organopolysiloxane, as an example, an antioxidant, a corrosion inhibitor, excessive strain additives and the like might be added as occasion demands. As the above-mentioned organopolysiloxane having an extremely-high viscosity, a linear organopolysiloxane, a branched organopolysiloxane and the like may be exemplified. So as to enhance the load effectivity 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. However, there are several problems, in the control cable through which a lubricant is used, akin to difficulty of operation for coating because dispersion of the load effectivity of products is attributable to the unevenness of a coating, rubbishes and dusts are easily adhered to the lubricant when making use of the lubricant to the management cable, and drip and the like are generated. However, when the viscosity of the organopolysiloxane is just too high, the amount of the organopolysiloxane which is extided from the floor of the resin is little, and in accordance the load effectivity and sturdiness of the management cable cannot be improved sufficiently.

However, in such a control cable, frictional resistance will increase when the conduit is immediately contacted with the interior cable. The polyoxymethylene also has properties reminiscent of low stickslip underneath a high load and improves the operationability of a control cable. When the melt index of the polybutylene terephthalate is lower than 0.1 g/10 minutes, it is difficult to provide a liner by means of an extruder, and when the melt index exceeds 5 g/10 minutes, there's a tendency that the liner is definitely peeled off from the conduit due to the lack of toughness of the liner during forming the liner and that bodily properties resembling durability and abrasion resistance required for the liner should not easily exhibited. As a material used in the liner, as an illustration, a artificial resin such as polyethylene, polyoxymethylene, polybutylene terephthalate or polytetrafluoroethylene is used. Examples of the thermoplastic resin used in the above-talked about liner are, for instance, polybutylene terephthalate, polyoxymethylene, polyamide represented by 1-nylon and 6,6-nylon, and the like, however the current invention isn't restricted to the exemplified ones and other thermoplastic resins can be used as far as the item of the current invention may be accomplished.

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