| abstract |
The purpose of the present invention is to provide a treatment agent for synthetic fibers, which is used for the production of synthetic fibers and is capable of reducing roll contamination, while having excellent heat resistance. A treatment agent for synthetic fibers according to the present invention contains a smooth component (A), an organic sulfonic acid compound (B1) represented by general formula (1), an organic sulfonic acid compound (B2) represented by general formula (2), and an organic phosphoric acid ester compound (C). The weight ratio of the organic phosphoric acid ester compound (C) in the nonvolatile content of the treatment agent is 0.05-10% by weight, and the weight ratio of phosphate ions (PO 4 n 3- ) as detected from the nonvolatile content of the treatment agent by ion chromatography is 300 ppm or less. |