材料汇·2025-12-22 14:13Core Viewpoint - The nylon 66 (PA66) industry is at a pivotal turning point in 2024, driven by domestic technological breakthroughs and the planning of million-ton production capacity, which is expected to dissolve the long-standing foreign monopoly on key raw materials like adiponitrile [2]. Industry Overview - Nylon 66, known as the "king of engineering plastics," is a semi-crystalline thermoplastic resin produced from adipic acid and hexamethylenediamine, characterized by its symmetrical molecular structure that provides high crystallinity and excellent physical properties [4][6]. - The historical development of PA66 reflects significant advancements in synthetic materials, starting from its invention by DuPont in the 1930s to its strategic military applications during World War II, and its subsequent industrial expansion [8][12][14]. - PA66's unique properties, such as high melting point (approximately 260°C), mechanical strength, self-lubrication, and chemical resistance, make it irreplaceable in various applications [18][19][20][21]. Industry Positioning - The PA66 industry is classified as both technology-intensive and capital-intensive, previously dominated by global giants like Invista, Ascend, and BASF. However, with China's advancements in adiponitrile technology, the industry is transitioning from a "noble plastic" to a more generalized engineering plastic [33]. Supply Chain Analysis - The nylon 66 supply chain is characterized by a "sandglass" structure, with numerous participants upstream and a highly concentrated midstream focused on adiponitrile production, which is critical for PA66 manufacturing [40][43]. - Adiponitrile is the key intermediate in the production of nylon 66, and its production technology is complex, with only a few companies globally mastering commercial production [48]. - The global supply landscape for adiponitrile has shifted from a triopoly dominated by Invista, Ascend, and Solvay to a more competitive environment, with China's self-sufficiency in adiponitrile rapidly increasing [51]. Market Analysis - The global nylon 66 market has historically been oligopolistic, with pricing heavily influenced by raw material costs and supply disruptions. However, the market is evolving towards a more competitive landscape as domestic production stabilizes [63][64]. - China's nylon 66 industry is experiencing a significant capacity expansion, transitioning from a net importer to a potential global manufacturing hub, with projections indicating a rise in domestic production capacity to over 200,000 tons by 2027 [69][72]. - The demand for nylon 66 is expected to grow, particularly in the high-end textile market, as price reductions due to increased supply make it more competitive against alternatives like nylon 6 [75]. Technical Analysis - The production process of nylon 66 is shifting towards continuous polymerization methods, particularly using vertical reactors, which enhance efficiency and reduce energy consumption [82][97]. - Continuous polymerization allows for a more stable production process, minimizing quality fluctuations and improving overall yield, which is crucial for meeting the growing demand [90][101]. Downstream Application Analysis - The downstream consumption of nylon 66 is highly concentrated, with engineering plastics accounting for approximately 57% and synthetic fibers for about 40% of the market [109].