Representative Examples of The Polyamide Are > 자유게시판

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The polymerization degrees of these types are different respectively. The type II has a polymerization diploma higher than the sort I, and is superb in stress-cracking resistance. However, in such a control cable, frictional resistance will increase when the conduit is directly contacted with the inner cable. Welcome to contact us for Elevator Cable, Crane Cable, Armored Cable, Welding Cable, Control Cable & Power Cable. Also, when the melt index is too giant, the polybutylene terephthalate lacks toughness and cracks are generated within the inside coat, and the liner is often broken when the internal coat is quickly bent in the assembling process of a management cable. 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 effectivity is small when the control cable is used for a protracted time frame. When the melt index of the polybutylene terephthalate is less than 0.1 g/10 minutes, it is troublesome to produce 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 easily peeled off from the conduit because of the lack of toughness of the liner during forming the liner and that bodily properties similar to durability and abrasion resistance required for the liner aren't easily exhibited.

Also, the above-talked about polybutylene terephthalate might contain a polymer similar to polyester or polyether-ester within a scope that the thing of the current invention is just not inhibited in the present invention. Also, it can be seen that the control cable produced in Comparative Examples, by which organopolysiloxane was contained solely in the thermoplastic resin of the inside coat, has low sturdiness. The polyoxymethylene additionally has properties comparable to low stickslip under a excessive load and improves the operationability of a management cable. FIG. 2 is an illustrative view of an apparatus for measuring the properties of the management cable of the present invention. The control cable has been conventionally used with a view to operate a transmission used in cars, autobicycles, bicycles and the like, a brake, a clutch, a speedmeter, and the like. 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 is not restricted to the exemplified ones and other thermoplastic resins can be utilized as far as the thing of the present invention might be completed.

Examples of the above-mentioned polybutylene terephthalate are, for instance, a homopolymer of butylene terephthalate, a copolymer of butylene terephthalate and other monomer similar to ethylene terephthalate having a content material of the other monomer of at most about 10% by weight, and the like. As a cloth used in the liner, as an example, a artificial resin resembling polyethylene, polyoxymethylene, polybutylene terephthalate or polytetrafluoroethylene is used. As a fabric for the inner coat, for example, Teflon, 11-nylon and the like are used. For instance, in case the scarcity of lubricants is generated as a result of lengthy period use of the control cable, there are some issues that the liner is completely worn down and the operationability of the management cable is excessively lowered, and the like. However, when a organopolysiloxane having too low a viscosity is contained in a large amount in the resin, there is a problem that the organopolysiloxane can't be successfully extruded to supply a liner, and thus the molding cannot be carried out due to the slipping of the resin on the cylinder barrel in the extruder. The management cable of the current invention comprises a conduit having flexibility, the inside floor of which being set up with a liner and an interior cable having an interior coat, and the inner cable is inserted into the conduit so that the inside cable freely slides within the conduit as talked about above.

A thermoplastic resin proven in Tables 1 to four was heated to melt, and the organopolysiloxane obtained in the above was added thereto in a proportion proven in Tables 1 to 4. After they had been uniformly kneaded, a liner having an inside diameter of 4.6 mm and an outside diameter of 5.6 mm was molded. The amounts of the organopolysiloxane having an extremely-excessive viscosity and the organopolysiloxane having a decrease viscosity contained within the thermoplastic resin of the above-talked about liner are adjusted so that the organopolysiloxane is composed of forty five to 85% by weight of the organopolysiloxane having an extremely-high viscosity and fifty five to 15% by weight of the organopolysiloxane having a decrease viscosity. In the current invention, for the reason that organopolysiloxane having an extremely-high viscosity and the organopolysiloxane having a decrease viscosity are dispersively contained within the thermoplastic resin used within the above-talked about liner, it is in fact that there is no such thing as a necessity to make use of a lubricant between the interspace of the conduit and the interior cable, and an excellent perform that the sliding operation of the conduit and the inner cable could be smoothly carried out for a long time frame, is exhibited.