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South China Polytechnic Co., Ltd. First Chaos Mixing Low Energy Extruder
The reporter learned from South China University of Technology yesterday that South China Polytechnic International Co., Ltd. has made a groundbreaking achievement by developing a multi-spindle convection-type screw chaotic mixing low-energy extruder, a world-first innovation in the field of polymer processing. Following an appraisal organized by the Department of Science and Technology of Guangdong Province, the project titled "Key Equipment and Technology R&D for High-Performance Polymer Packaging Materials Based on Chaotic Mixing" was recognized as reaching international advanced standards. Notably, the chaotic mixing, low-energy extrusion machine is the first of its kind globally, offering significant energy savings. This breakthrough not only breaks the long-standing monopoly of foreign companies in polymer extrusion systems for packaging materials but also allows for a wider range of raw materials to be used in producing high-barrier plastic packaging.
Professor Huang Hanxiong, who led the project, explained that the demand for high-barrier plastic packaging is growing rapidly, yet the key equipment and technologies for producing such materials in China have long lagged behind, with foreign firms from Japan, the U.S., and South Korea dominating the market. To address this challenge, South China University of Technology, in collaboration with Jiangmen Huilong Plastic Machinery Co., Ltd., conducted extensive research into polymer dispersion and melting theories. They designed and developed the key components of the production line—specifically the extruder and extrusion molding head—through innovative engineering. This led to the creation of a chaotic mixing extruder that offers high plasticization efficiency, high extrusion capacity, and significantly reduced energy consumption.
On-site testing by the Guangdong Provincial Technology Supervision Machinery Product Quality Inspection Station confirmed that the extruder’s 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 top global manufacturers in the U.S. and Japan, this extruder delivers higher output while consuming less energy.
Professor Huang added that polymers with high viscosity, such as nanocomposites and blends with a viscosity over 1, are typically difficult to process and prone to agglomeration, limiting their use in plastic packaging. However, the unique design of this extruder enables multiple effects—such as splitting, convection, pressurization-decompression, extension, thinning, and rolling—which allow for efficient processing of these challenging materials. By incorporating a small amount of barrier additives, it can produce high-performance packaging materials with excellent mechanical and thermal resistance. This expands the possibilities for high-barrier plastic packaging solutions.
Additionally, the extruder produces BOPP/LDPE composite films with strong peel strength, eliminating the need for toxic solvents during the EVA pre-coating process. This makes the composite manufacturing process greener and more environmentally friendly, without the use of adhesion promoters.