Tohoku Univ. Technology：Swelling followed by ball-milling for waste wire-harness recycling：T19-082_T19-440
Highly efficient and accurate separation of copper wires and PVC coating
Wire harnesses (WHs), the main target of this technology, are mainly used in automobiles and consist of bundles of thin wires that connect each component and are responsible for transmitting electrical signals and supplying power. Increased demand is expected with the rapid growth of electric vehicles in the future, and the development of efficient recycling technology for used WHs is strongly desired. To secure domestic resources and realize a decarbonized society, it is vital to recycle not only metal wires but also plastic coating materials. Chopping or comminution treatment is a common separation technology for treating used WHs, while it has limitations for mechanically recycling recovered plastic coating because it contains fine copper particles that are impurities for recycling. This invention enables the separation, sorting,and simultaneous recovery of copper wires and polyvinyl chloride (PVC) coating without the formation of fine particles by applying moderate impact in the ball mill equipment after swelling the coating material with organic solvent.
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The revenue generated from technology transfer is reinvested into universities and researchers as new research funding, which is used to create further research outcomes. To ensure the smooth operation of this cycle, known as the "Intellectual Creation Cycle," we will actively promote technology transfer. The types of seeds we handle include patents, know-how, databases, and programs. We have established a collaborative framework by concluding basic technology transfer agreements with the following universities (as of April 1, 2026): - Tohoku University - Hirosaki University - Iwate University - Akita University - Fukushima University - Yamagata University - Tohoku Gakuin University - Iwate Medical University - Fukushima Medical University - Aizu University - Miyagi University - Hokkaido University - Muroran Institute of Technology - Showa Medical University - Asahikawa Medical University
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