TREATMENT AGENT FOR SYNTHETIC FIBERS AND USE THEREOF

摘要

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 fouling, while having excellent heat resistance. The present invention is a treatment agent for synthetic fibers, which contains a smoothing component (A) and an organic sulfonic acid compound (B) represented by general formula (1). The weight ratio of the organic sulfonic acid compound (B) in the nonvolatile content of the treatment agent is 1.25-12% by weight. The weight ratio of sulfate ions (SO4 2-) detected from the nonvolatile content of the treatment agent by ion chromatography is 200 ppm or less, while the weight ratio of chlorine ions (Cl-) is 200 ppm or less. (In formula (1), each of a and b represents an integer of 0 or more; (a + b) is an integer from 5 to 17; and M represents a hydrogen atom, an alkali metal, an ammonium group or an organic amine group.)