Cellulose acetate filaments, an optically isotropic spinning sol

Details Cellulose acetate filaments, an optically isotropic spinning sol Cellulose acetate filaments, an optically isotropic spinning sol

1994-01-21

1995-09-12

Edwards, N.

Stock material or miscellaneous articles

Coated or structually defined flake, particle, cell, strand,...

Rod, strand, filament or fiber

428393, 536 69, 536 76, D02G 300

Patent

active

054495555

ABSTRACT:
There are described filaments on the basis of a cellulose acetate soluble in acetone, the degree of polymerization (DP) of the cellulose acetate being between about 110 and 210 and the degree of substitution (DS) preferably between about 2.2 and 2.7. Optically isotropic spinning solutions can be obtained, the cellulose acetate concentration of which is about 35 to 47 mass-%. When such an optically isotropic spinning solution is spun, in particular by dry spinning, filaments are obtained in a profitable manner because the costs connected with the recovery of the acetone can be appreciably lowered, without impairing the desirable properties of the filaments, which are suitable in particular for the production of cigarette filter tow.

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patent: 5269996 (1993-12-01), Lee

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