Advansix Resins & Chemicals Llc.

Tingzhi Chen

Yu Zhang

Min Wang

Shuwen Peng

Jie Wei

David J Loy

Methods of producing a polyamide filaments and fibers are provided. The methods include providing a dual-terminated polyamide and spinning the dual-terminated polyamide at a speed of 3500 m/min to 8000 m/min to form a fiber. In one embodiment, the polyamide has an amine endgroup concentration of 25 mmol/kg to 40 mmol/kg and a carboxyl endgroup concentration of 18 mmol/kg to 50 mmol/kg. Fibers and yarns comprising polyamide filaments and fibers formed from the method are also disclosed.

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Shanghai, China

Tingzhi Chen