High-strength, tear-resisting and antiflaming sheath rubber for cable and preparation method thereof

Abstract

The invention discloses high-strength, tear-resisting and antiflaming sheath rubber for a cable. The high-strength, tear-resisting and antiflaming sheath rubber for the cable is prepared from, by weight, 100 parts of chloroprene rubber, 0.5-2 parts of stearic acid, 0.5-3 parts of coupling reagent, 3-12 parts of magnesium oxide, 3-8 parts of zinc oxide, 10-40 parts of white carbon black, 5-20 parts of argil, 5-10 parts of talcum powder, 8-25 parts of fire retardant, 7-16 parts of plasticizer, 1-5 parts of anti-aging agent and 2-5 parts of accelerant. According to a preparation method of the high-strength, tear-resisting and antiflaming sheath rubber for the cable, the chloroprene rubber is plasticated for 5 minutes at the temperature of 60-70 DEG C and stands for more than 12 hours at the normal temperature, then mixing is carried out, half of the white carbon black, half of the argil, half of the talcum powder and half of the plasticizer and the stearic acid are added into plastication rubber and are evenly mixed, the other half of the white carbon black, the other half of the argil, the other half of the talcum powder and the other half of the plasticizer are added 2 minutes later, then mixing is carried out for 2 minutes, finally the accelerant and the zinc oxide are added for mixing, horizontal and longitudinal cutting is carried out, thinning is carried out six times, discharging is carried out after turn-mixing is carried out for 1 minute, and the cable sheath rubber is prepared on a slicing machine. The sheath rubber for the cable has the advantages of being high in tensile strength, high in tear strength, resistant to flame, good in flexibility, resistant to ozone and the like.

Description

technical field [0001] The invention relates to a high-strength, high-tear-resistant, flame-retardant sheath rubber for cables and a preparation method thereof, which are used in the technical field of preparation of rubber cables for coal mines. Background technique [0002] With the rapid development of my country's cable industry and the improvement of safety requirements for cable applications in all aspects, especially the development of coal mining machine cable machinery for open-pit mines and underground mines and the deterioration of the operating environment for mine cables, it is especially important for mines. Shearer cables put forward higher requirements, not only require the cable insulation layer to have excellent electrical properties and good physical and mechanical properties, but also put forward higher requirements for the physical and mechanical properties and service life of the sheath. At the same time, due to the frequent movement of mining shearer ca...

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Problems solved by technology

Such cable sheaths produced in China generally have problems such as low strength, easy to break, easy to tear, and short service life, which greatly restricts the improvement of production efficiency of enterprises. At present, mining with high strength and high tear performance Coal mining machinery cables or cable sheath rubber mainly rely on imports, and there are few known high-quality products in China

[0003] At present, the high-strength and high-tear-resistant sheath rubber for cables mainly relies on the combination of traditional reinforcing materials such as white carbon black, clay, etc. and the optimization of formula to improve the strength. Oxide vulcanization, the operation safety is not high; the use of softeners such as naphthenic oil or vaseline leads to a significant decrease in tensile strength; fillers such as silica and clay improve the tear strength, and the effect is not ideal; to achieve the desired effect requires Filling a large amount of reinforcing agent, the processing and extrusion process is relatively difficult; the products all have problems such as low tensile strength, low tear strength, poor aging performance, and short service life

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