High-heat-resistance insulating composite and preparation method thereof

Abstract

The invention discloses high-heat-resistance insulating composite and a preparation method thereof. The insulating composite comprises according to parts by weight: 30-40 parts of epoxy resin, 10-20 parts of polytetrafluoroethylene, 10-20 parts of polypropylene enhanced fiber 4-10 parts of silica powder, 10-25 parts of nano zinc oxide, 10-15 parts of nano calcium carbonate, 3-8 parts of silane coupling agent, 10-20 parts of nano aluminum oxide, 5-10 parts of dibenzoyl peroxide, and 7-12 parts of a plasticizer. The insulating composite is simple to manufacture, a manufacturing process is environment-friendly and pollution-free, the manufactured insulating composite is anticorrosive, damp-proof and high-temperature-resistant and flame-retardant, has good mechanical and electrical properties and is suitable for the preparation of power cables.

Description

technical field [0001] The invention relates to the technical field of insulating material preparation, in particular to a high heat-resistant mixed insulating material and a preparation method thereof. Background technique [0002] In recent years, my country's electric power industry has developed rapidly, the operating voltage level of the grid system has been continuously improved, and the network scale has gradually expanded. The ultra-high or ultra-high voltage transmission network is the backbone and core of the smart grid that the State Grid is building. Significantly improve the transmission capacity of my country's power grid and reduce long-distance power transmission losses, but higher voltage levels and DC transmission pose a major challenge to the safety and reliability of insulating materials widely used in electrical equipment. High-performance insulating materials are components of high-voltage, The technical core and key of UHV power transmission and transfor...

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Problems solved by technology

[0002] In recent years, my country's electric power industry has developed rapidly, the operating voltage level of the grid system has been continuously improved, and the network scale has gradually expanded. The ultra-high or ultra-high voltage transmission network is the backbone and core of the smart grid that the State Grid is building. Significantly improve the transmission capacity of my country's power grid and reduce long-distance power transmission losses, but higher voltage levels and DC transmission pose a major challenge to the safety and reliability of insulating materials widely used in electrical equipment. High-performance insulating materials are components of high-voltage, The technical core and key of UHV power transmission and transformation equipment and network, the level and stability of its electrical performance are directly related to the voltage level and safety of the entire power transmission network. Therefore, the development of high-performance insulating materials is crucial to the construction of safe, reliable, stable and efficient DC ultra-high voltage transmission and transformation network is of great significance to improve the power transmission level of our country and save resources. The existing insulation materials for power cables have poor corrosion resistance and high heat resistance, which affects the service life of power cables.

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