Aqueous-quench spinning of polyamides

Details Aqueous-quench spinning of polyamides Aqueous-quench spinning of polyamides

1993-07-16

1994-11-08

Tentoni, Leo B.

Plastic and nonmetallic article shaping or treating: processes

With twining, plying, braiding, or textile fabric formation

264178F, 2642108, 26421114, D01D 508, D01D 5088, D01F 660

Patent

active

053624300

ABSTRACT:
Molten polyamide filaments are extruded from spinneret capillaries through a gas-filled gap and into a quench bath which contains a heated aqueous liquid. The bath has a nozzle defining a vertically disposed cylindrical passageway with its entrance in the bath below the bath surface. The filaments are converged into a filament bundle at the entrance and withdrawn from the exit of the passageway at a withdrawal speed of about 1500 to about 3500 meters per minute. The polyamide polymer is extruded from the spinneret such that the jet velocity in the spinneret capillaries is between 2 and 10% of the withdrawal speed of the filament from the exit of the nozzle passageway.

REFERENCES:
patent: 2243397 (1943-07-01), Hull
patent: 3002804 (1961-10-01), Kilian
patent: 3621088 (1971-11-01), Hatcher et al.
patent: 3944708 (1976-03-01), Dumas
patent: 4970042 (1990-11-01), Kakiuchi
patent: 4983448 (1991-01-01), Karageorgiou

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