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US 4,261,943 AGranted
Process for surface treating cellulose products
AssigneeAkzona Incorporated
InventorClarence C. McCorsley, III
Life of this patent
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Abstract
This invention relates to a process for treating the surface of cellulosic shaped products such as fibers, films filaments, yarns and the like, formed from a spinning dope of a solution of cellulose in amine oxide, by applying to the surface of the product a nonsolvent liquid that will reduce the solvent action of the amine oxide for cellulose at the surface of the product.
Claims26
A process for inhibiting surface adhesion of adjacent filaments formed from a spinning of cellulose in amine oxide comprising:
- continuously extruding said spinning solution in an air space to form spaced adjacently positioned filaments and, before said filaments are brought into contact with each other, applying to the surface of said filaments a continuous coating of a nonsolvent liquid that will reduce the solvent action of the amine oxide for cellulose at the surface of the filaments.
A method for making a cellulose fiber which comprises
- spinning into an air space a solution containing cellulose dissolved in a tertiary amine oxide solvent for cellulose,
- drawing the resulting filaments in air while avoiding mutual contact to orient their molecular structure,
- wetting the surface of said filaments with a nonsolvent for cellulose which is compatible with said solution to precipitate cellulose only adjacent to the surface of the filaments about a core of said solution,
- precipitating the cellulose in said core with nonsolvent for the cellulose, and
- drying the resulting fiber without additional drawing.
2 more elements
Dependencies are inferred from the claim text.