Workflow
大咖分享(二) | 金发科技 王春燕博士:废旧渔网PA6的高质化再生利用技术研究
KINGFAKINGFA(SH:600143) DT新材料·2025-05-26 14:48

Core Viewpoint - Plastic pollution is a significant ecological challenge globally, with China's polyamide 6 (Nylon 6) apparent consumption market exceeding 4 million tons by the end of 2023, while the recycling volume is only 1 to 1.5 million tons, primarily from old fishing nets and waste textile fibers [1][3]. Group 1: Recycling Challenges and Innovations - Traditional recycling of old fishing nets faces three main challenges: difficulty in separation, contamination, and performance degradation due to long exposure to marine environments [1]. - The development of green and efficient cleaning agents and processes has enabled the appearance quality of recycled PA6 pellets to approach that of virgin materials, meeting high-grade product application needs [3]. - The molecular weight of recycled PA6 has been improved through a synergistic approach of reactive extrusion and solid-phase toughening, resulting in a 22% increase in impact strength and a bending strength exceeding 111 MPa, surpassing some virgin resins [3][4]. Group 2: Chemical Recycling and Industrialization - A negative pressure melting depolymerization technology has been developed to achieve mild depolymerization in a vacuum environment, increasing the yield of caprolactam (CPL) monomer to 70% with a purity exceeding 99% [4]. - The company has established a full-process technology chain from targeted recycling channel construction to solvent recovery systems, supporting the supply of over 2 million tons of various types of environmentally friendly recycled plastics [4]. Group 3: Industry Trends and Future Directions - The Chinese nylon industry is accelerating its transition towards high-end and low-carbon production, driven by breakthroughs in the synthesis of special materials and the domestic production of key raw materials [7]. - Emerging applications in electric vehicles, electronics, and intelligent robotics are raising performance requirements for nylon materials, presenting both opportunities and challenges for formulation design and process optimization [7].