Representative Examples of The Polyamide Are > 자유게시판

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Representative examples of the type III are, for example, Teflon FEP160 commercially obtainable from DUPONT-MITSUI FLUORO CHEMICALS CO., LTD., and the like. Representative examples of the polyoxymethylene are, as an example, DELRIN commercially obtainable from Du Pont, Celcon commercially obtainable from Hoechst Celanese, and the like. As is evident from the outcomes proven in Tables 1 to 4, the management cables of the current invention produced in Examples are excellent in preliminary load efficiency and cargo effectivity after the operation was carried out 1,000,000 instances in comparison with the management cables produced in Comparative Examples when both the sort of the thermoplastic resin used within the liner in Examples and that in Comparative Examples are the identical. The polybutylene terephthalate additionally has a characteristic that the difference of the initial load effectivity and the load efficiency after the control cable is operated for a protracted time period is small. When the content material of the organopolysiloxane is lower than 13% by weight, the load efficiency is lowered when the management cable is used for a long period of time. Also, since a liner containing a selected organopolysiloxane is used in the management cable of the present invention, wonderful load effectivity is continued for an extended time frame.

As mentioned above, for the reason that management cable of the present invention doesn't necessitate a lubricant, an issue regarding workability for coating a lubricant is solved and irregurality of load efficiency of products because of the uneveness of coating just isn't generated. FIG. 1 is a partially-reduce-off perspective view displaying one embodiment of the pull kind control cable of the present invention. The internal cable 1 was gone there and back 60 strokes per one minute. Also, when the melt index is too large, the polybutylene terephthalate lacks toughness and cracks are generated in the interior coat, and the liner is usually broken when the inner coat is quickly bent within the assembling process of a control cable. Accordingly, it is preferable that the melt index is 0.5 to 5 g/10 minutes. Accordingly, it is preferable that the melt index is at most 5 g/10 minutes. When the melt index is more than 5 g/10 minutes, there is a tendency that oil resistance, stress cracking resistance and abrasion resistance deteriorate.

The polyoxymethylene is superb in abrasion resistance and has a low abrasion coefficiency. Also, it may be seen that the control cable produced in Comparative Examples, during which organopolysiloxane was contained solely within the thermoplastic resin of the inner coat, has low durability. The polybutylene terephthalate is great in thermal resistance, oil resistance and abrasion resistance, and has a low coefficient of friction. The sort II has a polymerization diploma greater than the sort I, and is excellent in stress-cracking resistance. The smaller the melt index of the polybutylene terephthalate is, the higher the durability resembling abrasion resistance and stress-cracking resistance is, however it tends to be troublesome for finishing up the extrusion molding. Among the thermoplastic resins used in the interior coat, polybutylene terephthalate, high density polyethylene, polyoxymethylene and polyphenylene-sulfide are significantly preferable as a result of these are wonderful in abrasion resistance. Further, it may be seen that the management cable produced in Example 5, by which organopolysiloxane was dispersively contained in thermoplastic resins of each the liner and the inner coat, has physical properties almost equal to the control cables produced in different Examples, in which organopolysiloxane was dispersively contained solely within the thermoplastic resin of the liner.

A thermoplastic resin shown in Tables 1 to four was heated to melt, and the organopolysiloxane obtained within the above was added thereto in a proportion shown in Tables 1 to 4. After they were uniformly kneaded, shield control cable a liner having an inside diameter of 4.6 mm and an outside diameter of 5.6 mm was molded. The skin of the armor 5 is covered with the protective layer 6 having a thickness of 0.7 mm. Within the protective layer 6, numerous supplies conventionally recognized such as polypropylene and polyvinyl chloride can be utilized. Next, the liner was inserted into a conduit having a protective layer made from polypropylene of 0.7 mm in thickness on the skin floor of a springy armor layer having an outdoor diameter of 8.6 mm. The conduit 2 is composed of an armor layer 5 and a protective layer 6 of a artificial resin reminiscent of polypropylene. Also, as a resin of the internal coat, a thermoplastic resin by which the above-talked about organopolysiloxane is dispersively contained could be used in the same approach as within the above-talked about liner. Examples of the thermoplastic resin are, for example, polybutylene terephthalate, high density polyethylene, polyoxymethylene, a fluorocarbon resin represented by polytetrafluoroethylene, a polyamide represented by 6,6-nylon, polyphenylene sulfide, and the like, however the present invention is not limited by the exemplified ones.