F/R polyester staple fiber is made of phosphorus F/R polyester chips through imported production lines and the key specification is 1.4d×38mm F/R polyester staple fiber (high intensity and low drawing). Features are stable quality and easy for weaving. Quality standard parameters shown in following table: Name A+ Level A Level Breaking strength cN/dtex ≥ 5.25 5.00 Breaking extension % 28±4.0 28±5.0 Linear density variation % 3.0 4.0 Length variation % 3.0 6.0 Tenacity at 10% fixed length ≥ 2.65 2.2 Long fiber content % ≤ 0.5 1.0 Over-length fiber mg/100g 2.0 6.0 Defects mg/100g ≤ 2.0 8.0 Curled Fiber /25mm 12~15 12~15 Curling Degree % 12~15 12~15 Specific resistance .cm ≤ Oil content % ≤ 0.2 0.3 Note: 1. F/R polyester staple fibers are tested according to GB/T14464-93. 2. P content of the F/R polyester staple fibers can be adjusted by customer's requirements.