Representative Examples of The Polyamide Are > 자유게시판

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The current invention relates to a management cable, and more significantly to a management cable excellent in load efficiency, and the inner cable of which having the ability to be smoothly operated for an extended time frame. Among the many above-mentioned thermoplastic resins, polybutylene terephthalate having a melt index of 0.1 to 5 g/10 minutes can be significantly ideally used because the change of load effectivity is small when the control cable is used for a long period of time. In the present invention, because the organopolysiloxane having an ultra-excessive viscosity and the organopolysiloxane having a decrease viscosity are dispersively contained in the thermoplastic resin used in the above-mentioned liner, it is in fact that there is no such thing as a necessity to use a lubricant between the interspace of the conduit and the inside cable, and a superb function that the sliding operation of the conduit and the inner cable will be easily carried out for a long period of time, is exhibited. On the other hand, a considerable amount of the organopolysiloxane having a excessive viscosity will be contained in the resin, and the molding can 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 efficiency is lowered. However, when a organopolysiloxane having too low a viscosity is contained in a large quantity in the resin, there is a problem that the organopolysiloxane can't be effectively 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. The amounts of the organopolysiloxane having an ultra-excessive viscosity and the organopolysiloxane having a lower viscosity contained in the thermoplastic resin of the above-mentioned liner are adjusted in order that the organopolysiloxane is composed of forty five to 85% by weight of the organopolysiloxane having an ultra-excessive viscosity and fifty five to 15% by weight of the organopolysiloxane having a decrease viscosity. As an example, a way comprising ading the organopolysiloxane having an extremely-high viscosity and the organopolysiloxane having a lower viscosity separately to the thermoplastic resin whereas heating and kneading the thermoplastic resin and uniformly dispersing them, a way comprising including the organopolysiloxane, which is beforehand ready by mixing the organopolysiloxane having an ultra-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 might be exemplified.

To the organopolysiloxane, for example, an antioxidant, a corrosion inhibitor, extreme strain additives and the like may be added as occasion demands. As the above-mentioned organopolysiloxane having an ultra-excessive viscosity, a linear organopolysiloxane, a branched organopolysiloxane and the like might be exemplified. So as to enhance the load effectivity of a control cable without a lubricant, an organopolysiloxane is contained in a resin for a liner or an interior coat, and the organopolysiloxane extides from on the floor of the resin. However, there are several issues, in the control cable wherein a lubricant is used, comparable to problem of operation for coating as a result of dispersion of the load efficiency of merchandise is caused by the unevenness of a coating, rubbishes and dusts are easily adhered to the lubricant when applying the lubricant to the control cable, and drip and the like are generated. However, when the viscosity of the organopolysiloxane is just too excessive, the amount of the organopolysiloxane which is extided from the surface of the resin is little, and in accordance the load efficiency and sturdiness of the control cable cannot be improved sufficiently.

However, in such a control cable, frictional resistance increases when the conduit is immediately contacted with the internal cable. The polyoxymethylene additionally has properties akin to low stickslip below 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 the use of an extruder, and when the melt index exceeds 5 g/10 minutes, there is a tendency that the liner is well peeled off from the conduit as a result of lack of toughness of the liner during forming the liner and that physical properties such as sturdiness and abrasion resistance required for the liner aren't simply exhibited. As a fabric used in the liner, as an example, a synthetic resin resembling polyethylene, polyoxymethylene, polybutylene terephthalate or polytetrafluoroethylene is used. Examples of the thermoplastic resin used within the above-mentioned liner are, for instance, polybutylene terephthalate, polyoxymethylene, polyamide represented by 1-nylon and 6,6-nylon, and the like, however the present invention just isn't restricted to the exemplified ones and different thermoplastic resins can be used so far as the article of the current invention can be completed.

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