Representative Examples of The Polyamide Are > 자유게시판

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The current invention relates to a management cable, and more significantly to a control cable glorious in load effectivity, and the interior cable of which with the ability to be smoothly operated for an extended period of time. Among the above-talked about thermoplastic resins, polybutylene terephthalate having a melt index of 0.1 to 5 g/10 minutes might be particularly ideally used because the change of load efficiency is small when the management cable is used for a long time frame. In the present invention, for the reason that organopolysiloxane having an ultra-excessive viscosity and the organopolysiloxane having a decrease viscosity are dispersively contained in the thermoplastic resin used in the above-talked about liner, it's in fact that there isn't a necessity to use a lubricant between the interspace of the conduit and the internal cable, and a superb operate that the sliding operation of the conduit and the interior cable will be easily carried out for an extended time period, is exhibited. On the other hand, a large amount of the organopolysiloxane having a excessive viscosity may be contained in the resin, and the molding might be carried out without slipping.

When the kinematic viscosity exceeds 10000 cSt, the organopolysiloxane does not 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 big quantity within the resin, there's a problem that the organopolysiloxane cannot be successfully extruded to provide a liner, and thus the molding can't be carried out because of the slipping of the resin on the cylinder barrel in the extruder. 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-mentioned liner are adjusted so 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 decrease viscosity. As an example, a method comprising ading the organopolysiloxane having an extremely-excessive viscosity and the organopolysiloxane having a lower viscosity individually to the thermoplastic resin whereas 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 might be exemplified.

To the organopolysiloxane, for instance, an antioxidant, a corrosion inhibitor, extreme stress additives and the like could be added as occasion demands. As the above-mentioned organopolysiloxane having an ultra-excessive viscosity, a linear organopolysiloxane, a branched organopolysiloxane and the like can be exemplified. In order to enhance the load effectivity of a control cable and not using a lubricant, an organopolysiloxane is contained in a resin for a liner or an inner coat, and the organopolysiloxane extides from on the floor of the resin. However, there are a number of issues, in the management cable wherein 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 simply 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 too high, the amount of the organopolysiloxane which is extided from the floor of the resin is little, and according the load effectivity and durability of the control cable can't be improved sufficiently.

However, in such a management cable, frictional resistance will increase when the conduit is directly contacted with the inside cable. The polyoxymethylene additionally has properties corresponding to low stickslip under a excessive load and improves the operationability of a management cable. When the melt index of the polybutylene terephthalate is lower than 0.1 g/10 minutes, it is 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 well peeled off from the conduit because of the lack of toughness of the liner during forming the liner and that physical properties reminiscent of sturdiness and abrasion resistance required for the liner aren't easily exhibited. As a fabric used within 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-mentioned liner are, for example, polybutylene terephthalate, polyoxymethylene, polyamide represented by 1-nylon and 6,6-nylon, and the like, but the current invention isn't restricted to the exemplified ones and different thermoplastic resins can be used as far as the article of the current invention will be completed.

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