Polyester synthetic fiber treatment agent, polyester synthetic fiber treatment method, and polyester synthetic fiber

摘要

A polyester synthetic fiber that simultaneously satisfies emulsification stability, heat resistance, antistatic properties in a carding process in a spinning process, and scum accumulation resistance in a drawing process, and does not cause a decrease in fiber strength over time. The processing agent for polyester, the processing method of the polyester synthetic fiber using this processing agent, and the polyester synthetic fiber obtained by this processing method are provided. As a treating agent for polyester-based synthetic fibers, a specific alkyl phosphate is 40 to 80% by mass, a specific surfactant is 10 to 50% by mass, and an alkyl group having 12 to 22 carbon atoms in the molecule. What contained 0.01 to 10 mass% (total 100 mass%) of monohydric aliphatic alcohol which has this was used. [Selection figure] None