Highly flexible cable for drag chain and manufacturing method thereof

Abstract

The invention discloses a highly flexible cable for a drag chain and a manufacturing method thereof. An oil-resistant rubber insulating layer is wrapped on the periphery of a stranded copper conductor in an extruding way to form an insulating core wire; a plurality of insulating core wires are re-stranded into an insulating core wire bundle; a plurality of insulating core wire bundles are arranged around a highly elastic torsion-resistant reinforcing core in a way of a concentric circle and are stranded into a cable core; and an oil-resistant sheath is wrapped on the periphery of the cable core in the extruding way. The insulating layer comprises the following raw materials in parts by weight: 15 parts of ethylene propylene rubber K21, 15 parts of chlorinated polyethylene rubber CM352, 0.5 to 0.6 parts of vulcanizing agent DCP, 0.2 to 0.3 parts of vulcanizing agent TAIC, 0.3 to 0.5 parts of anti-aging agent MB, 0.1 to 0.3 parts of anti-aging agent RD, 1.0 to 2.0 parts of paraffin oil, 1 to 2 parts of chlorinated paraffin-52, 0.5 to 1.0 part of microcrystalline wax, 1.5 to 2.5 parts of active magnesium oxide, 0.4 to 0.7 parts of calcium stearate, 10 to 15 parts of ultrafine talcum powder, 1 to 2 parts of gas phase method white carbon black, 6 to 8 parts of calcined clay and 0.2 to 0.4 parts of coloring agent. The cable is good in insulating and mechanical performances and is oil-resistant.

Description

technical field [0001] The invention relates to a cable, in particular to a highly flexible cable for drag chains; the invention also relates to a manufacturing method for the highly flexible cable for drag chains. Background technique [0002] At present, the cables used in the towline system are mostly layered cables with extruded tube sheaths. During use, the cables bend and move together with the towlines, which often causes the internal bending stress of the cables to be difficult to eliminate, the wire core breaks, and the sheath surface cracks. Wrinkled, twisted and deformed, which affects the service life and operation safety; at the same time, due to the open-air construction, the towline cable is easy to contact with equipment oil, which accelerates aging and shortens the service life. The existing cable uses ethylene-propylene rubber insulation material to make the insulation layer in consideration of flexibility. However, ethylene-propylene rubber is a non-polar ...

AI Technical Summary

Problems solved by technology

However, due to the poor electrical insulation properties of chlorinated polyethylene and chlorosulfonated polyethylene, they cannot be used as insulating materials for cables.

[0007] The invention patent with the publication number CN 102399397A discloses a cold-resistant rubber cable sheath and its preparation method. It uses chlorinated polyethylene and ethylene-propylene rubber to mix, uses chlorinated polyethylene as the main rubber, and uses N-isopropylbenzene- As an anti-aging agent, N'-phenyl-p-phenylenediamine has low temperature resistance to -40°C, but poor heat aging resistance, only resistant to 100°C heat aging, and poor electrical insulation performance

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