F/R polyester yarn adopts our F/R polyester staple fiber (high intensity and low drawing) as the material and involves spinning and double-twisting. Products available include 6S~ 45S single and double yarn. Features are stable quality and even textile strands (Uster standard) and high intensity. Quality standard parameters shown in following table: Name A+ Level A Level Note Evenness of strands CV (%) ≤ 13~16 13~17 Breaking strength of single yarn ≥ 29~26 28~25 Breaking strength of a single yarn CV % ≤ 10.0 12.0 Twist evenness CV (%) ≤ 6.0 8.0 Weight evenness CV (%) ≤ 2.0 2.5 Note: 1. F/R polyester thread is tested according to FZ63001-92. 2.>P content of the F/R polyester yarn can be adjusted by customer's requirements