Method for manufacturing polyester fibers

Details Method for manufacturing polyester fibers Method for manufacturing polyester fibers

2005-05-03

2005-05-03

Tentoni, Leo B. (Department: 1732)

Plastic and nonmetallic article shaping or treating: processes

Forming continuous or indefinite length work

Shaping by extrusion

C264S210800, C264S211120, C264S211140, C264S237000

Reexamination Certificate

active

06887414

ABSTRACT:
Method for manufacturing polyester fibers comprising melt-extruding a polymer without increasing an intrinsic viscosity of the polymer during spinning to minimize a reduction of the intrinsic viscosity of the polymer; maintaining a low atmospheric temperature directly below a nozzle to maximize a degree of orientation of undrawn yarn; winding the polymer at 2,000 m/min or more to produce a undrawn yarn, followed by drawing the undrawn yarn through continuous three phases at low temperature. The method has advantages in that high strength and low shrinkage polyester fibers with a uniform fineness and physical properties can be manufactured at high spinning efficiency, without formation of broken filament and curved filament, by preventing formation of a vortex of cooling air with the use of eddy plates directly below a nozzle.

REFERENCES:
patent: 5433591 (1995-07-01), Zingsem et al.
patent: 6511624 (2003-01-01), Cho et al.

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