CNAS certified polyester fiber yarns excel in several key indicators. High strength, can withstand large tensile force, stability in textile and other applications is not easy to break; good toughness, complex processing or long-term use of still maintain good physical properties; good uniformity, uniform thickness of the fiber threads can enhance the quality of the subsequent processing products, such as to ensure that apparel, home textiles and other products, fabric surface flatness and texture.