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. 06, 1979
Filed:
Jun. 16, 1976
Shikibo Limited, Osaka, JP;
Abstract
A process for improving the properties, particularly the dyeing properties, of cellulose fibers. The process comprises impregnating cellulose fiber with an aromatic acyl halide and thereafter immersing the impregnated fiber into an aqueous solution containing more than about 10% by weight of an alkali hydroxide to acylate the cellulose fiber on the surface portion thereof. In another embodiment of the invention, a continuous process for improving the properties of cellulose fiber yarn or fabric is provided. According to the continuous process, uniform acylation is achieved by maintaining the yarn or fabric in a stretched state during impregnation with the aromatic acyl halide and during the initial stages of immersion in the aqueous alkali hydroxide. The acylated cellulose fiber produced according to the invention may be dyed with good color fastness with disperse dyes and still retain the soft tactility characteristic of the fiber.