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:
Nov. 29, 1983
Filed:
May. 06, 1981
Applicant:
Inventors:
Merrick S Blackie, West Haddon, GB;
John R Collins, Leamington Spa, GB;
Assignee:
Courtaulds Limited, London, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B29C / ;
U.S. Cl.
CPC ...
264-8 ; 264 12 ; 264207 ;
Abstract
Cellulose ester fibres are dry-spun from a solution in an aliphatic carboxylic acid, which solution may comprise the product liquor of the carboxylation reaction used to form the cellulose ester. Spinnability is achieved by incorporating an organic fibre-forming carrier polymer such as poly(ethylene oxide) in the spinning dope. The process may be used to spin cellulose acetate fibres and is economical in avoiding the use of conventional acetate solvents and the various purification stages usually required after the acetate is formed by acetylation. Blow-spinning or centrifugal spinning may be used to spin fine fibres.