Patent ID: 7690182

Claim:
A straight-type finish for synthetic fibers comprising a lubricant at 70-99.5 mass % of the total and a functional improvement agent at 0.5-30 mass % of the total, a metal organic sulfonate shown by formula 1 being contained at least as a part of said functional improvement agent at 0.05-15 mass % of the total, said formula 1 being where R 1 and R 2 are each alkyl group with 1-36 carbon atoms, alkenyl group with 2-24 carbon atoms, phenyl group, alkyl-phenyl group having alkyl group with 1-36 carbon atoms, naphthyl group, alkyl-naphthyl group having alkyl group with 1-36 carbon atoms, or 1,2-bis(alkyloxycarbonyl)-1-ethane group having alkyl group with 4-24 carbon atoms; and M is a divalent metal.