Process for manufacturing yarns by meltspinning polyethylene...

Details Process for manufacturing yarns by meltspinning polyethylene... Process for manufacturing yarns by meltspinning polyethylene...

D - Textiles, Paper

01

F

18/622

D01F 6/62 (2006.01) D01D 5/098 (2006.01)

Patent

CA 1290521

ABSTRACT The process is carried out in one operation wherein solid PETP is melted and the molten PETP is extruded through spinning orifices and solidified into a spun product which is drawn into a yarn. For this process, the solid PETP has a relative viscosity in the range of 1.8 to 2.1; before spinning the PETP is mixed with 0.1-0.8% by weight of a bis-[ketenimine]; the molten PETP is drawn off from the spinneret orifices at a speed in the range of 1500 to 4000 m/min; and the spun product formed is drawn without intermediate winding at a draw ratio of 1.5 to 4.0 with the proviso that the draw ratio is such that the final speed of the yarn is not higher than 6000 m/min.

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