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South China Polytechnic Co., Ltd. First Chaos Mixing Low Energy Extruder
At a recent press briefing, it was revealed that South China Polytechnic International Co., Ltd., in collaboration with South China University of Technology, has developed a groundbreaking multi-spindle convection-type screw chaotic mixing low-energy extruder. This innovation marks a significant milestone on the global stage. Following an appraisal by the Department of Science and Technology of Guangdong Province, the "Key Equipment and Technology R&D for High-Performance Polymer Packaging Materials Based on Chaotic Mixing" project has been recognized as reaching international advanced standards. Among its key components, the chaotic mixing low-energy extruder stands out as the first of its kind worldwide, offering exceptional energy efficiency.
This breakthrough not only breaks the long-standing monopoly of foreign companies in polymer extrusion lines for packaging materials but also expands the range of raw materials that can be used to produce high-barrier plastic packaging. According to Professor Huang Hanxiong, who led the project, the demand for high-barrier plastic packaging is growing rapidly. However, China had previously relied heavily on imported equipment and technology from Japan, the U.S., and South Korea.
To address this challenge, South China University of Technology, together with Jiangmen Huilong Plastic Machinery Co., Ltd., conducted extensive research on polymer dispersion melting theory. They designed and developed key equipment, including the extruder and extrusion molding head, overcoming critical technical barriers. The result is a chaotic mixing extruder that offers high plasticization, high extrusion output, and significantly reduced energy consumption.
On-site testing by the Guangdong Provincial Technology Supervision Machinery Product Quality Inspection Station confirmed that the extruder’s unit energy consumption is 0.17 kW/(kg/h), which is 0.15 kW/(kg/h) lower than the JB/T 8061-96 standard. Compared to similar machines from leading international manufacturers, this extruder delivers higher output while consuming less energy.
Professor Huang added that polymer nanocomposites and blends with a viscosity above 1 have traditionally been difficult to process due to their tendency to agglomerate. The new extruder’s unique design enables multiple effects such as splitting, convection, pressure-decompression, extension, thinning, and rolling, making it ideal for processing these challenging materials. By incorporating a small amount of barrier additives, it can produce high-performance packaging materials with excellent mechanical and heat resistance properties.
Additionally, the BOPP/LDPE composite film produced using this extruder exhibits strong peel strength. It eliminates the need for toxic solvents in the production of EVA pre-coated films, enabling a green and solvent-free composite process without the use of adhesion promoters. This advancement represents a major leap forward in sustainable and efficient plastic packaging technology.