The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 28, 1995
Filed:
May. 23, 1994
Katharine A Wykes, Wellesbourne, GB;
Michael C Quigley, Meriden, GB;
Courtaulds Fibres (Holdings) Limited, London, GB;
Abstract
In a process for making solvent-spun cellulose fibre, cellulose is dissolved in aqueous N-methylmorpholine N-oxide to form a solution, said solution is passed through at least one pipe, the temperature in degrees Centigrade of said solution in the center of said pipe being controlled at 1000/(X+0.98.sqroot.D) and/or the temperature of said solution at the interior wall of said pipe being controlled at 1000/(Y+1.15.sqroot.D) where D represents the internal diameter of said pipe in inches, X represents a value equal to or greater than 5.0 and Y represents a value equal to or greater than 5.4, and said solution is subsequently extruded through a die to form filaments which are coagulated, washed with water to remove said solvent and then dried, thereby forming said solvent-spun cellulose fibre.