| 摘要 |
A single-step process by which HMLS industrial yarns may be manufactured, in which (a) the solid PETP has a relative viscosity (determined as described below) in the range of 1.8 to 2.1; (b) before spinning, the PETP is mixed with 0.1-0.8% by weight of a bis-(kenenimine); (c) the molten PETP is drawn off from the spinneret orifices at a speed in the range of 1500 to 4000 m/min; and (d) the spun product formed is drawn without intermediate winding at a draw ratio of 1.5 to 4.0, the draw ratio being selected such that the final speed of the yarn is not higher than 6000 m/min.
|
