Corrosion-resistant insulating material for underground cables and preparation method thereof

Abstract

The invention provides a corrosion-resistant insulating material for underground cables and a preparation method thereof, which belongs to the technical field of insulating materials, and comprises components and contents thereof: 20-28 parts by weight of epoxy resin, 12-18 parts by weight of polytetrafluoroethylene Parts by weight, 3.8-5.5 parts by weight of coupling agent, 12-17 parts by weight of nano oxide, 4.5-5.6 parts by weight of polydienyl propylene dimethyl ammonium chloride, 17-22 parts by weight of polyvinylidene fluoride, N, 35-44 parts by weight of N-dimethylacetamide, 6.7-7.2 parts by weight of waterproofing agent, 8.9-9.6 parts by weight of corrosion-resistant agent, 3.4-4.7 parts by weight of inhibitor, 3.3-4.2 parts by weight of flame retardant, 20-26 parts by weight of acetone Parts by weight, 40-55 parts by weight of water. The insulating material prepared by the invention has good mechanical performance and flame-retardant performance, strong water resistance and corrosion resistance, excellent comprehensive performance, and is suitable for underground damp and cold environments.

Description

technical field [0001] The invention relates to the technical field of insulating materials, in particular to a corrosion-resistant insulating material for underground cables and a preparation method thereof. Background technique [0002] In the modern society, due to the shortage of urban land, high traffic pressure, city appearance construction and other reasons, many cables have also gone underground from the original overhead. Compared with overhead lines, underground cables have the advantages of small footprint, reliable power transmission, and strong anti-interference ability. [0003] Power cables are generally laid below the surface and are often used as power lead-in or lead-out lines for power plants, substations, and factories and mines. Compared with overhead lines, power cables are less affected by the climate because they are laid below the ground surface, are safe, reliable, concealed and durable, but the cost of materials, laying costs, and maintenance cost...

AI Technical Summary

Problems solved by technology

However, the tensile strength of this insulating material is a maximum of 20.1N / mm 2 , the maximum elongation at break is 422.8%, and the mechanical properties need to be improved. In the preparation method of this invention, the raw materials are only banburyed twice without drying, modification and other treatments, resulting in insufficient purity and poor overall performance of the material