| abstract |
The present invention relates to a high speed manufacturing method of a polyester filament capable of stably producing a package having a good appearance with a very small breakage of filaments, and the high speed manufacturing method of the polyester filament of the present invention is 3000m / min It consists of melt-dyeing polyester filament at the spinning speed above, the monobasic acid ester having an average molecular weight of 300 to 500 as a main component, (a) 1 to 15% by weight of a polyoxyalkylene glycol copolymer having an average molecular weight of 1000 or more, (b) An aqueous emulsion of an emulsion containing from 0.1 to 3% by weight of an organosiloxane compound and / or a compound containing a fluoroalkyl group is used for the polyester filaments described above. |