Construction of Shandong Jincheng Petrochemical’s narrow-distribution UHMWPP project has begun
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On December 10, the construction of a 300,000-ton/year production facility for narrow-distribution ultra-high molecular weight polypropylene (UHMWPP), invested in and built by Shandong Jincheng Petrochemical Group Co., Ltd., commenced. This project utilizes metallocene catalysts developed independently by the High-End Synthetic Materials Research Institute of Jincheng Petrochemical. Compared with ordinary polypropylene materials, the products produced have advantages such as high tensile strength, high light transmittance, and high rates of reuse and recycling. They can be used to manufacture high-end polypropylene products such as specialty materials for long-fiber reinforced prepreg tapes and ultra-fine denier polypropylene fibers. At present, domestic metallocene polyolefin products rely mainly on imports. Once completed and put into operation, this project is expected to reduce China’s reliance on imports of high-end polypropylene products.
Basic properties of ultra-high molecular weight polyethylene UHMWHPE: It has a relative molecular weight of over 1.5 million, and is a special engineering plastic whose comprehensive performance features are not found in polyethylene with conventional molecular weights. Its molecular structure is exactly the same as that of ordinary polyethylene, except that its molecular weight is extremely high. Among UHMWPE with a relative molecular mass of over 1.5 million, there are also grades with relative molecular masses of 2 million, 3 million, and even as high as over 5 million. Material properties: 1. The average molecular weight ranges from about 350,000 to 8 million; due to this high molecular weight, it possesses excellent properties such as impact resistance, wear resistance, self-lubrication, and chemical resistance that are unmatched by other plastics ； 2. It exhibits excellent low-temperature resistance, maintaining high impact strength at -40°C, and can even be used at -269°C ； 3. It possesses electrical insulation, low water absorption, and physiological inertness ； 4. It possesses excellent resistance to stress cracking, creep, and fatigue. Application scope: It is used in fields such as machinery, transportation, textiles, papermaking, mining, agriculture, chemicals, and sports equipment, with large packaging containers and pipes being the most common applications ； Due to its excellent physiological inertness, it is also used in clinical medicine as heart valves, orthopedic components, and artificial joints.