Process for producing a regenerated hollow cellulosic fiber
AssigneeInternational Telephone and Telegraph Corporation
InventorsAlbin Frank Turbak, Richard Benjamin Hammer, Norman A. Portnoy, Arthur C. West
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Abstract
Hollow cellulosic fibers are produced by nitrosating and dissolving a cellulosic material in an aprotic solvent selected from the group consisting of a dialkylacylamide and dimethylsulfoxide and regenerating the dissolved cellulose by contacting the cellulose solution with a regenerant. The regenerant is n-octanol where the solvent is a dialkylacylamide and n-hexanol where the solvent is dimethylsulfoxide. The fibers are hollow as regenerated and require no special spinnerette designs nor special spinning conditions.
Claims8
A process for producing a regenerated hollow cellulosic fiber comprising nitrosating cellulose with a nitrosating agent selected from the group consisting of an oxide of nitrogen and nitrosyl chloride and dissolving the cellulose in an aprotic solvent selected from the group consisting of a dialkylacylamide and dimethylsulfoxide and regenerating the dissolved cellulose by contacting the cellulosic solution with a regenerant, said regenerant being n-octanol where the solvent is a dialkylacylamide and n-hexanol where the solvent is dimethylsulfoxide.
Dependencies are inferred from the claim text.