| 摘要 |
PROBLEM TO BE SOLVED: To obtain a twistless sizing-free weft for weaving by a water jet loom, capable of preventing wear of a reed and a heddle and stain of a nozzle for weft flying by spinning a polyester at a high speed, cooling and solidifying the yarn and providing the yarn with a finishing oil containing a specific alkyl phosphate alkali metal salt. SOLUTION: A polyethylene terephthalate is subjected to melt spinning, taken-off by a take-off roller, successively drawn between the take-off roller and a drawing roller in a fixed ratio and taken-up at >=3,500m/minute speed. In the taking-up process, after the yarn extruded in a molten state is cooled and solidified and before it is sent to the drawing process, the yarn is provided with 0.5-1.5wt.% of a finishing oil containing 4-15wt.% of an alkyl phosphate alkali metal salt containing a 12-18C alkyl group such as isocetyl phosphate potassium salt and >=40 % branched alkyl ratio through a metering oiling roller to give the objective twistless sizing-free weft for weaving by a water jet loom. |
