【Ten Years of Great Progress in Chemical Technology】The First Industrial Pilot Production of Long-Chain Branched Linear Low-Density Polyethylene in China from 2024 to 2023

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On July 19, 2023, the LLDPE unit at the Polyolefins Center of Yulin Energy Chemical Company carried out industrial pilot production of long-chain branched linear low-density polyethylene, which was the first time such a thing was done in China. This product was developed through a collaboration between Yulin Energy Chemical Industry and the Joint Laboratory for High-Performance Polyolefin Resins at the Institute of Chemistry, Chinese Academy of Sciences, enabling a direct transition from laboratory research to industrial production. According to industry experts, the regulation of the molecular chain structure is one of the effective ways to achieve high-performance polymers. By introducing long-chain branching structures into linear low-density polyethylene resins with high mechanical properties, their processability can be improved, enabling the production of products with superior performance in areas such as blow molding, foaming, film extrusion, and coating – thereby enhancing the influence of high-end polyolefin products in the market. Prior to this industrial pilot production, the LLDPE plant refined the conversion plan repeatedly to ensure success from the first attempt, and installed an additive feeding system on-site in accordance with the technical guidelines. After the production change order was issued, the operators successfully injected the production aids and adjusted the key parameters at the right time, effectively preventing potential problems such as the formation of large clumps, poor discharge of materials, and low quality of output. It is understood that approximately 400 tons of qualified products were produced during this industrial pilot production.