High strength and low shrinkage polyester filament

     High strength and low shrinkage polyester filament is a performance optimized synthetic fiber. By optimizing the polymerization process (such as increasing the relative molecular weight) and spinning and stretching process, the orientation and crystallinity of the fiber molecular chain are significantly improved. The tensile strength can reach 4.5-7.0 cN/dtex (ordinary polyester filament is about 4.0-5.0 cN/dtex), and the elongation at break is moderate (20% -35%). It is suitable for scenarios that require high load (such as tire curtain fabric, industrial canvas, etc.). The chemical stability of polyester itself is further strengthened in high strength and low shrinkage varieties, and its acid resistance, alkali resistance, organic solvents and other properties are outstanding, which can maintain stable performance in harsh environments. High strength and low shrinkage polyester filament achieves a balance between strength, dimensional stability, and environmental adaptability through performance optimization, and is an important material in the industrial and high-end textile fields.