In December 2025, the cable material field ushered in a technological innovation with “lightweight” and “high temperature resistance” as dual cores, which is reconstructing the industry’s development logic from material R&D and structural design to application scenarios in an all-round way. In the lightweight direction, new aluminum alloy conductors, relying on micro-alloying and special heat treatment processes, have a conductivity of over 61% that of pure copper and a density of only 2.7g/cm³, reducing weight by 60% compared with copper cables. In urban power grids and rail transit scenarios, they reduce material costs by 60% and improve installation efficiency by 30%; carbon nanotube-reinforced copper matrix composites have even achieved a breakthrough in the laboratory stage with conductivity reaching 80% of pure copper and tensile strength increased by 50%.

High temperature resistance technology focuses on adaptability to extreme environments. Ceramified silicone rubber can quickly form a dense ceramic layer in fire scenarios through irradiation cross-linking technology, with fire resistance time exceeding 90 minutes, and has been applied to the fire prevention renovation of Changchun power grid; MI cables with magnesium oxide inorganic insulation layer can withstand high temperatures of 950℃, ensuring circuit safety in key scenarios such as Shanghai Outer Ring Tunnel and nuclear power plants. The two technologies work together to promote the dual upgrading of “weight reduction & efficiency improvement + heat resistance protection” for cables in new energy vehicles, offshore wind power and other fields.