Flame-retardant and fire-resistant marine cable insulating rubber and manufacturing method thereof

Abstract

The invention discloses a flame-retardant and fire-resistant cable insulation rubber for ships and a production method therefor. The raw materials are 20 parts of ethylene propylene diene monomer rubber 4045M, 0.5-0.6 part of vulcanizing agent DCP, 0.2-0.3 part of co-vulcanization agent TAC, 0.1-0.3 part of anti-aging agent MB, 0.1-0.3 part of anti-aging agent RD, 0.1-0.2 part of coupling agent A-172, 15-20 parts of aluminum hydroxide, 3-6 parts of ceramic glass powder, 1-1.5 parts of plasticizer No 1000 steam cylinder oil, 6-8 parts of fine talcum powder, 4-7 parts of reinforcing agent hydrated silica, and 5-8 parts of reinforcing agent calcined pottery clay. First, ethylene propylene diene monomer rubber 4045M is subjected to mixing for 1-1.5min, then the anti-aging agents, the coupling agent, aluminum hydroxide, the ceramic glass powder, the plasticizer, talcum powder and the reinforcing agents are added in order and after the above mixture is subjected to mixing for 7-8min, the mixture is unloaded and aired for above 24h; then the above rubber material is subjected to 2-3min, and the vulcanizing agent and the co-vulcanization agent are added in the last 20 seconds, the material after mixing is loaded in an open mill for thin-pass, after triangular packaging and square packaging are performed, sheets are obtained. The insulation rubber has simple production technology, low cost, small external diameter and light weight, is flexible and easy to bend, and is convenient for construction and installation.

Description

technical field [0001] The invention relates to a cable insulating rubber, in particular to a flame-retardant and fire-resistant marine cable insulating rubber. The invention also relates to a method for manufacturing flame-retardant and fire-resistant marine cable insulating rubber. Background technique [0002] At present, fire-resistant marine cables generally adopt several structures such as mica tape wrapped conductor, mineral insulation, and extruded refractory silicone rubber outer braided glass fiber wire combination insulation, etc., but the fire-resistant cables of several structures have great disadvantages: [0003] Mica tape wrapped fire-resistant cables are wrapped with mica tapes overlapping outside the conductor. Due to the large number of cores in marine cables, wrapping with mica tapes will result in large outer diameter and heavy weight of the finished cable, which is not conducive to ship loads. [0004] The remarkable feature of mineral insulated cables...

AI Technical Summary

Problems solved by technology

However, the gravitational force between the ceramizable silicone rubber molecules is small, and it has an amorphous structure, and its physical and mechanical properties are very poor. According to the provisions of "Wire", refractory glass fiber wire must be braided outside the silicone rubber insulation to enhance the mechanical properties, which makes the structure and production process of the finished cable complicated; and the high temperature water vapor resistance and acid and alkali resistance of silicone rubber are poor, which is not conducive to the ship's equipment. It is used in alkaline corrosion environment; in addition, silicone rubber is expensive and does not meet the economic requirements of the product

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