Process for the preparation of polyketone fibers

Details Process for the preparation of polyketone fibers Process for the preparation of polyketone fibers

1997-02-13

1998-10-13

Tentoni, Leo B.

Plastic and nonmetallic article shaping or treating: processes

Forming continuous or indefinite length work

Shaping by extrusion

264205, 2642108, D01D 504, D01D 506, D01D 516, D01F 626

Patent

active

058208062

ABSTRACT:
It has been found that fibres can be spun in a simple manner from polyketone polymer solutions by making a thermoreversible gel from a solution of polyketone and a solvent for the polymer having a boiling temperature above 443 K, a melting temperature below 373 K, and a polymer dissolving temperature above 443 K. The thermoreversible gel forms as the solution is cooled. Because of the specific properties of the solvent in combination with the concentration of the polymer and its intrinsic viscosity, a permanently orientable thermoreversible gel is formed by cooling. The polymer crystallises on being cooled, optionally while still in the presence of the solvent. Preferably, so much polymer is dissolved higher than 0.35 (dl/g).sup.0.5.

REFERENCES:
patent: 5194210 (1993-03-01), Lommerts et al.

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