... 20d--1260D Material: Polyamide Polyamide Monofilament Yarn. We have advanced production lines in our company, which produce nylon filament yarns, polyester yarn ... ,500 tons of twisting silk, 3,000 tons of nylon lines and 5,000 tons of polyester high-strength yarns.Our ... Shanghai Institute of Synthetic Fiber, who are responsible for the production and R&D around the year.