Patent ID: 7351350

Claim:
A processing agent for synthetic fibers, said processing agent consists of 50-90 weight % of a lubricant, 1-30 weight % of a functional improvement agent and 2-30 weight % of an emulsifier, wherein said lubricant is selected from the group consisting of polyether compounds with average molecular weight of 700-10000, aliphatic ester compounds with 17-60 carbon atoms and mineral oils having a viscosity of 1×10 −6 -5×10 −5 m 2 /s at 30° C., said functional improvement agent is shown by Formula 1, wherein Formula 1 is: where R 1 , R 2 , R 3 and R 4 are each hydrogen atom or aliphatic hydrocarbon group with 1-6 carbon atoms, two or less thereof being hydrogen atom at the same time, the total number of carbon atoms in R 1 -R 4 in Formula 1 being 2-14; R 5 and R 6 are each hydrogen atom; and A 1 and A 2 are each residual group obtainable by removing hydrogen atoms from all hydroxyl groups of (poly)alkyleneglycol having (poly)oxyalkylene group formed with a total of 1-30 oxyalkylene units with 2-4 carbon atoms.