Corrosion-resistant zero-shrinkage flame-retardant cable material

Abstract

The invention discloses a corrosion-resistant zero-shrinkage flame-retardant cable material, which is characterized by comprising the following components in parts by weight: 30-40 parts of chlorosulfonated polyethylene rubber; 30 to 40 parts of poly ethylene-propylene methylene rubber; 15-20 parts of polybenzoxazine; 10-15 parts of hydroxyl epoxidized polybutadiene; 12 to 18 parts of a modified graphene oxide- polypyrrole compound; 5-10 parts of polyurea grease; 6-10 parts of a polymer initiator; 5-8 parts of a nano polyelectrolyte layer embedding corrosion inhibitor; 6-9 parts of sisal cellulose; 3-5 parts of reinforced nano microspheres and 3-5 parts of a flame retardant. The cable material has the characteristics of good heat resistance and corrosion resistance, high antistatic performance and high flame retardance with zero deformation, reduces the risk of arc effect and short-circuit fire caused by the cable material, prolongs the service life, and improves the insulation safetyperformance.

Description

technical field [0001] The invention relates to the technical field of cable materials, in particular to a corrosion-resistant zero-shrinkage flame-retardant cable material. Background technique [0002] Wires and cables used for power transmission and information transmission are widely used in industrialization and information society. A large number of wires and cables are produced and put into use in my country every year. Since the preparation materials of the cable sheath layer and insulating layer are mostly organic polymers, which carry a large amount of fire load, once the interconnected cables catch fire due to electrical faults such as arcs and short circuits, the poisonous gas and heat released will seriously endanger people. health, and cable fires are also highly contagious. With the improvement of fire protection requirements, for some important places (such as nuclear power plants), it has been clearly required to use flame-retardant cables, and typical PVC-...

AI Technical Summary

Problems solved by technology

With the improvement of fire protection requirements, for some important places (such as nuclear power plants), it has been clearly required to use flame-retardant cables, and typical PVC-resistant cables release a large amount of gas when heated, and the overall performance shows severe expansion and foaming effects , the porous carbon layer formed by expansion has the function of heat insulation and oxygen insulation, which makes the ignition process more complicated

[0003] During the use of the cable, frequent power on-off switching will cause the temperature to fluctuate greatly. Due to the frequent changes in temperature, the stress and strain of the cable material are called temperature self-stress and temperature self-strain. From a mechanical point of view, it belongs to compressive stress and compression. The strain property is mainly due to the constraints of the terminal and joint space, which will lead to cable fatigue, increased plastic deformation, and increased shrinkage. Unlike ordinary "thermal expansion and contraction", thermal contraction is an irreversible process, so It will affect the insulation life and performance. The temperature change of the sheath material is smaller than that of the insulation sheath, but the fatigue creep will also affect the cable protection life to a certain extent.

[0004] At the same time, the sheath and insulation layer will be gradually corroded due to the humidity of the environment or air oxidation of the cable material during use, and the cable core will be exposed to the air or multiple cable cores will contact each other to generate an arc, resulting in a short circuit and large-scale power outages. but also prone to fire

[0005] Chinese patent 201810792838.7 discloses a high flame-retardant and corrosion-resistant cable material. Although the flame retardant has been improved in its technical solution and the amount of flame retardant used has been reduced, the phenylguanidine carbonate used in the technical solution When the salt encounters an acidic environment, it is easy to generate carbon dioxide, which in turn causes the cable material to foam, and the expanded vermiculite and diatomaceous earth used are also easy to expand, and the cable material is prone to strain effect when the temperature rises, which increases the production of the cable material. Arcing effect, short-circuit fire hazard, and reduced service life; therefore, although flame retardants and corrosion-resistant agents are used in cable materials, the danger of burning caused by its deformation greatly exceeds its flame-retardant and corrosion-resistant components for cable materials Insulation safety performance

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