Plastic and nonmetallic article shaping or treating: processes – Forming continuous or indefinite length work – Shaping by extrusion
Patent
1983-01-28
1984-07-03
Woo, Jay H.
Plastic and nonmetallic article shaping or treating: processes
Forming continuous or indefinite length work
Shaping by extrusion
2642091, 264206, D01F 618
Patent
active
044578857
ABSTRACT:
Hollow acrylonitrile fibres and filaments are prepared by dry spinning the spinning dope through a nozzle having loop-shaped nozzle orifices, the solution having a viscosity equivalent to at least 120 falling ball seconds, measured at 80.degree. C., or at least 75 falling ball seconds, measured at 100.degree. C., wherein the nozzle orifice area of the profiling nozzle is smaller than 0.2 mm.sup.2 and the maximum width of the sides of the loop-shaped nozzle is 0.1 mm and the overlap between the two ends of the sides of the loop-shaped nozzle forms an angle of from 10.degree. to 30.degree. measured from the center of the nozzle and wherein the spinning air acts on the filaments in a transverse direction to the filament take-off and the air direction forms an angle of from 80.degree. to 100.degree. with a straight line passing through the opening between the sides.
REFERENCES:
patent: 3340571 (1967-09-01), Bishop et al.
patent: 3558420 (1971-01-01), Opfell
patent: 4085174 (1978-04-01), Ishikawa et al.
patent: 4176150 (1979-11-01), Bromley et al.
patent: 4296175 (1981-10-01), De Maria et al.
Bernklau Kurt
Burghartz Hans K.
Herbertz Toni
Jungverdorben Hermann-Josef
Reinehr Ulrich
Bayer Aktiengesellschaft
Woo Jay H.
LandOfFree
Process for the production of dry-spun hollow polyacrylonitrile does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Process for the production of dry-spun hollow polyacrylonitrile , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for the production of dry-spun hollow polyacrylonitrile will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1629983