Process for the manufacture of cellulosic fibers; and cellulosic

Details Process for the manufacture of cellulosic fibers; and cellulosic Process for the manufacture of cellulosic fibers; and cellulosic

1998-01-07

1999-09-28

Tentoni, Leo B.

Plastic and nonmetallic article shaping or treating: processes

Forming continuous or indefinite length work

Shaping by extrusion

264203, 26421115, 26421117, 264233, 264234, D01F 202

Patent

active

059583207

ABSTRACT:
Cellulosic fibers made from a solution of cellulose in a tertiary amine oxide and optionally water and which have a low tendency to fibrillate are produced by coagulating the fibers in at least two stages. The residence time of the fibers in the first coagulation stage is adjusted so that on leaving the first coagulation stage only the adhesiveness of the surface of the solution formed into fibers has been counteracted. In subsequent coagulation stages, the fibers are kept in a slack state. On leaving the final coagulation stage, the fibers have been thoroughly coagulated. The cellulosic fibers have a new structure and apart from a very low tendency to fibrillate, they possess a high dyeing level.

REFERENCES:
patent: 2319305 (1943-05-01), De Nooij et al.
patent: 4246221 (1981-01-01), McCorsley, III
patent: 4416698 (1983-11-01), McCorsley, III
patent: 5403530 (1995-04-01), Taylor
patent: 5601771 (1997-02-01), Ruf
Derwent Abstract AN 95-383273, English-language Abstract for WO 96/07779.
Derwent Abstract AN 96-321869, English-language Abstract for WO 96/20301.
Derwent Abstract AN 97-352093, English-language Abstract for 196 00 572 A1.
Derwent Abstract AN 87-228828, English-language Abstract for 244 366 A1.

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