field of science and Technology
Cables for new energy such as nuclear power, photovoltaics, and wind energy must have excellent long-term thermal aging resistance, radiation resistance, stable electrical properties, and good flame retardant properties. The existing insulation materials are basically halogen-free flame retardant insulation materials for cables, which generally have shortcomings such as short life, easy cracking, and poor insulation performance under moist conditions. As a high-efficiency, low-energy-consuming and pollution-free crosslinking method, electron beam irradiation crosslinking produces products that are insoluble, non-fusible, heat resistant, chemical corrosion resistant, and non-dripping during combustion; it also has high product performance level, wide material application range, and easy to meet special use requirements.
Main technological innovation content and characteristics

1. The effect of different radiation doses on electron beam radiation crosslinking of polyolefin halogen-free flame retardant materials was studied. Radiation crosslinking can generally be carried out at room temperature and pressure, and the crosslinking time is short, which can effectively reduce smoke dispersion, that is, reduce It delays burning, thereby improving flame retardancy, and avoids possible damage to the flame retardant during chemical crosslinking. The synergistic effect between different types of flame retardants, the influence of halogen-free flame retardants on the crosslinking reaction mechanism of polyolefins, and the relationship between the composition and properties (electrical properties, flame retardant properties, mechanical properties, processing properties, etc.) of crosslinked polyolefin halogen-free flame retardant materials were studied. The thermal decomposition mechanism and flame retardant mechanism of crosslinked polyolefin halogen-free flame retardant materials were discussed.
2. Researched on the surface modification technology and microcapsule coating technology of non-halogen flame retardants, successfully solved the problem of serious deterioration of mechanical properties caused by the addition of a large amount of non-halogen flame retardants in polyolefins, and introduced silicone polymers. After radiation crosslinking, a halogen-free flame retardant and non-flame retardant material with excellent high temperature resistance and flame retardant properties was obtained.
3. By adding ultra-concentrated emulsion to prepare chain-like silicone lubricants with different degrees of polymerization, the compatibility between inorganic flame retardants and binders and other components can be better achieved, thereby solving the problem of difficulty in mixing and extrusion. And the lubricant has excellent heat resistance and electrical insulation properties. Technical problems such as cable cracking, large thermal shrinkage, and significant reduction in insulation resistance due to moisture caused by adding a large amount of inorganic flame retardant are solved.
4. Improve the production process through the selection of screw molds, cooling of finished products and other means to make operability strong; and the product stability is good; adopting appropriate irradiation process reduces residual free radicals in the product and reduces defective products.
5. Prepare polyacrylate-organic P flame retardant. At the same time, a polymer containing benzene ring is introduced, which can convert radiant energy into heat energy through internal conversion, thereby enhancing the radiation resistance of the material. It is blended with polyolefin materials, halogen-free flame retardants, etc. to obtain a cable insulation material with excellent electrical properties and resistance. It has strong radiation resistance, excellent heat aging resistance, excellent oil resistance, excellent heat and heat resistance, non-halogen, low smoke, low toxicity, good flame retardant properties, and long service life. After cross-linking by electron beam radiation, nuclear cables, photovoltaic cables, wind energy cables, etc. can be made.
   Since the launch of this project, a total of 12 invention patents have been applied, of which 5 have been authorized; academic publications have been published in domestic and foreign journals and international conferences
   There were 27 papers, 15 of which were searched by SCI/EI. I was cited by him more than 200 times. It has been widely recognized at home and abroad.
   It has been widely used in nuclear power, photovoltaics, wind energy and other fields. It has been used in large and medium-sized cable factories such as Wuxi Xinhongye, Tianshui Cable Factory, Wuhu Jiahong, Beijing Kete Xingye Thermal Control, Jiangsu Suzhong Cable Factory, Jiangsu Baoyuan High-tech Electric, Taicang Jinkai Special Wire and Cable Co., Ltd., Jiangsu Dasheng Group, Linhai Yadong Special Cable Materials Factory, and Jiangsu Shangshang Cable Group. The products of Linhai Yadong Special Materials Factory have been used for a long time in key national projects such as Qinshan, Tianwan, Lingao, Daya Bay Nuclear Power Plant and Guangzhou, Shenzhen, Nanjing, Tianjin, Beijing, Shanghai subways and the Beijing Olympics. Their performance conforms to the LOCA test and IEC standards. As of the end of 2014, new sales revenue was 542.85 million yuan, taxes paid were 25.07 million yuan, and net profit was 35.9 million yuan. With the launch of the third-generation nuclear power "Hualong One" with independent intellectual property rights, China's independently innovative nuclear cables will also have better development.