化纤深度：各有所用，供需何异？

Investment Rating - The investment rating for the chemical fiber industry is "Positive" and maintained [4]. Core Insights - Chemical fibers are the core materials for textiles, with significant market growth, currently accounting for approximately 85% of total textile fiber consumption. The main varieties include polyester, spandex, nylon, viscose, and acrylic, each with distinct supply and demand characteristics [2][4]. - The demand for chemical fibers is primarily driven by population growth and economic development, with varying consumption levels and growth rates across different fiber types. For instance, the compound annual growth rate (CAGR) for polyester filament over the past decade is 8.2%, while cotton has only seen a 2.3% growth [4][31]. - The supply side shows differentiated capacity growth, with a trend towards concentration and vertical integration among leading companies, enhancing their competitive edge [5][4]. Summary by Sections Consumption Side: Differentiated Scale and Growth Rates - Polyester filament accounts for over 50% of total textile fiber consumption, with cotton being the second largest at 790 million tons. The consumption levels for other fibers like spandex and nylon are significantly lower, with spandex consumption below 100 million tons [4][31]. - The CAGR for major fiber types from 2014 to 2023 shows polyester filament at 8.2%, spandex at 7.0%, and viscose at 3.2%, while acrylic has seen a decline of 3.7% [31][35]. Supply Side: Differentiated Capacity Growth and Trends - The investment intensity varies across fiber types, with spandex having the highest investment intensity at 3.35 billion CNY per ton, while polyester filament has the lowest at 0.54 billion CNY per ton [5]. - The industry is experiencing a consolidation phase, with leading companies increasing their market share as smaller firms exit the market. This trend is particularly evident in the polyester filament and spandex sectors [5][4]. Industry Trends: Vertical Integration and Profitability - Companies are increasingly pursuing vertical integration to enhance profitability by controlling upstream raw materials, thereby raising entry barriers for smaller competitors [5]. - Profitability varies among different fiber types, with spandex generally showing higher margins compared to polyester filament. Companies with raw material advantages and integrated supply chains tend to outperform their competitors [5][4]. Market Outlook and Investment Recommendations - The supply-demand dynamics for polyester filament are expected to tighten, with limited new capacity planned for 2024-2025, indicating a positive outlook for leading companies like Tongkun and Xinfengming [5]. - The spandex sector is anticipated to recover as new capacity is absorbed, making companies like Huafeng Chemical attractive for investment [5].