Process for manufacturing yarns by meltspinning polyethylene ter

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

1989-06-29

1991-04-23

Lorin, Hubert C.

Plastic and nonmetallic article shaping or treating: processes

Forming continuous or indefinite length work

Shaping by extrusion

2642108, 264211, 26421114, D01F 662

Patent

active

050098292

ABSTRACT:
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.

REFERENCES:
patent: 3452132 (1969-06-01), Pitzl
patent: 3692745 (1972-09-01), Molendar
patent: 4003974 (1977-01-01), Chantry et al.
patent: 4113704 (1978-09-01), MacLean

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