Polyamide yarn process

Details Polyamide yarn process Polyamide yarn process

2003-09-05

2011-11-08

Johnson, Christina (Department: 1742)

Plastic and nonmetallic article shaping or treating: processes

Forming continuous or indefinite length work

Shaping by extrusion

Reexamination Certificate

active

08052906

ABSTRACT:
A process for making a synthetic melt spun polyamide filament in a solid phase polycondensation apparatus is disclosed. The flow rate of the purge (make-up) gas to the apparatus is increased, and the overall pressure in the apparatus is decreased, as compared to solid phase polycondensation apparatus of the prior art. As a result, the removal of the thermal degradation impurity from the polymer flake contributes to improving the yarn quality and at the same time, extends the spinneret wipe life.

REFERENCES:
patent: 3480596 (1969-11-01), Holmes
patent: 4034034 (1977-07-01), Eberius et al.
patent: 4952345 (1990-08-01), Rao et al.
patent: 6235390 (2001-05-01), Schwinn et al.
patent: 0 098 616 (1984-01-01), None
patent: WO 00/26448 (2000-05-01), None
Fourne, Synthetic Fibers, Chapter 4, p. 359, C. Hanser Publishers, Munich 1998.

Affiliated with

Also associated with

Rating

Polyamide yarn process does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Polyamide yarn process, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Polyamide yarn process will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4292791