Abstract: A finish for synthetic filament yarn which decreases broken filaments and ends down in friction false-twist texturing includes 40 to 98 wt % of a polyether compound, and essentially comprises components (A) and (B); wherein the component (A) is at least one member selected from the group consisting of (A1) a C1-C10 fatty acid, (A2) a C1-C10 hydroxyfatty acid, (A3) a sarcosine derivative, and salts thereof, and the amount of the component (A) in the finish ranges from 0.05 to 5 wt %; and wherein the component (B) is an alkylphosphate salt and the amount of the component (B) in the finish ranges from 0.01 to 3 wt %.

Abstract: The present invention aims to provide a finish for synthetic filament yarn processed in friction false-twist texturing, which decreases broken filaments and ends down in false-twist texturing with a synthetic filament yarn applied with the finish, finish-application emulsion of the finish, synthetic filament yarn applied with the emulsion, manufacturing process of the synthetic filament yarn, and resultant yarns. The finish for synthetic filament yarn processed in friction false-twist texturing of the present invention comprises 40 to 98 wt % of a polyether compound, and essentially comprises components (A) and (B); wherein the component (A) is at least one member selected from the group consisting of (A1) a C1-C10 fatty acid, (A2) a C1-C10 hydroxyfatty acid, (A3) a sarcosine derivative, and salts thereof, and the amount of the component (A) in the finish ranges from 0.05 to 5 wt %; and wherein the component (B) is an alkylphosphate salt and the amount of the component (B) in the finish ranges from 0.