Polyester synthetic fiber treatment agent, first component for treating polyester synthetic fiber, second component for treating polyester synthetic fiber, and polyester synthetic fiber

Abstract

This invention provides a polyester synthetic fiber treatment agent, a first polyester synthetic fiber treatment agent, a second polyester synthetic fiber treatment agent, and polyester synthetic fibers, which can improve the antistatic and combing properties of fibers treated with a synthetic fiber treatment agent. The polyester synthetic fiber treatment agent of this invention is characterized by containing a specific alkyl phosphate ester (A), a nonionic surfactant (B), and a specific nitrogen-containing polycarboxylic acid potassium salt (C).