| 摘要 |
PROBLEM TO BE SOLVED: To obtain a false twist yarn excellent in stretching property capable of improving rough/firm feeling and quality of textile by blending the predetermined amount of polyethylene terephthalate to polybutylene terephthalate, spinning under a specific condition and applying a false twist processing. SOLUTION: The false twist yarn of the blended polyester having torque twisting constant <=1500, TR manifesting shrinking property <=20% is obtained by blending the polybutylene terephthalate and polyethylene terephthalate including 10-90 wt.% of the polyethylene terephthalate using a static mixer having numbers of partitions >=103 in the molten state, spinning in the winding speed >=2500 m/min, applying the false twisting process setting the heater temperature at 180-210 deg.C. A stretch woven fabric is preferably obtained by shrinking a fabric comprising twistless yarn or the false twist yarn of the blended polyester applied a real twisting process having real twist constant <=3000, to have a shrink rate of <=400% in a shrinking process at >=70 deg.C.
|
