Ultra-clean cross-linked polyethylene insulation material is a key material for high-voltage and ultra-high-voltage cables and has broad market development prospects.
Ultra-clean cross-linked polyethylene insulation material, referred to as ultra-clean XLPE insulation material, is a type of high-voltage and ultra-high-voltage cable materials. Insulation is the key performance of wires and cables. Conventional cables have lower voltage level requirements, and polyvinyl chloride (PVC), polyethylene (PE), etc. can usually be used as insulation materials. High voltage and ultra-high voltage cables have higher voltage level requirements and internal electric fields. The strength is high. In order to prevent breakdown, the insulating materials required must have high purity and uniformity.
Relevant national and industry standards strictly limit the size and quantity of impurities in cable insulation materials. For example, according to the State Grid High Voltage Cable Procurement Standards, 110kV and 220kV cable insulation materials must not have impurities greater than 0.125mm, greater than 0.05mm and less than or equal to 0.125 The number of impurities in mm shall not be greater than 6/10cm3; the 330-500kV cable material shall not have opaque impurities greater than 0.075mm. Therefore, the production and industrial control requirements for high-voltage and ultra-high-voltage cable insulation materials are relatively high. At present, the insulation materials that meet these requirements are mainly ultra-clean cross-linked polyethylene insulation materials.
Ultra-clean cross-linked polyethylene insulation material is mainly made of high-quality low-density polyethylene resin as raw material, adding antioxidants, cross-linking agents and other auxiliary materials, and is prepared using a closed mixing device. It has excellent purity, uniformity, Insulation performance, machining performance, anti-aging performance, heat resistance, corrosion resistance, etc., play an important role in high-voltage and ultra-high-voltage cable manufacturing. Terminal application fields include marine engineering, aerospace, power transmission networks, new energy power generation, etc. .
In 2022, the loop length of 110 kV and above transmission lines in my country’s power grid will exceed 1.2 million kilometers, and the loop length of 220 kV and above transmission lines will exceed 800,000 kilometers. Currently, against the backdrop of my country’s accelerating urbanization, smart grid construction, and changes in energy supply methods, the demand for high-voltage and ultra-high-voltage cables has increased significantly. As a key material for high-voltage and ultra-high-voltage cables, the demand for ultra-clean cross-linked polyethylene insulation material continues to grow. According to the “2023-2028 ultra-clean cross-linked polyethylene insulation material industry market in-depth research and investment prospect forecast analysis report” released by the Industrial Research Center 》 Shows that my country’s market demand for ultra-clean cross-linked polyethylene insulation materials will exceed 50,000 tons in 2022, and the market development prospects are broad.
Ultra-clean cross-linked polyethylene insulation materials have high technical barriers and are difficult to produce. For a long time, the domestic market has been dominated by two companies, Austrian Borealis (Borealis) and the American Dow Chemical (DOW). Therefore, the localization of ultra-clean cross-linked polyethylene has significant economic and social benefits. Based on this, many domestic companies have entered the market.
Industry analysts said that as of now, my country has Zhejiang Wanma Polymer Materials, Beijing Yanshan Petroleum A few companies such as the chemical industry have the ability to mass produce ultra-clean cross-linked polyethylene insulation materials, and the domestic substitution process in the domestic market will continue to accelerate in the future. Among them, the “ultra-high voltage cable (220kV) ultra-clean XLPE insulation material independently developed by Zhejiang Wanma has passed the national new product identification as early as 2015, and was selected into the list of key products and one-stop process application demonstrations of the Ministry of Industry and Information Technology; Yanshan Petrochemical adopts independent research and development technology, successfully built the country’s first continuous-process, fully enclosed, ultra-clean cross-linkable polyethylene insulation material production device, and its “cross-linkable polyethylene insulation material” product performance has reached the international leading level.
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