Dyeing modified viscose fibers with acid or direct dyes

US5542955A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Andreas Schrell · Hofheim, DE
• Andreas von der Eltz · Frankfurt am Main, DE

Key dates

• Filing date: Sep 29, 1995
• Grant date: Aug 6, 1996
• Expiry date: Sep 29, 2015

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S8/921
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

Process for dyeing regenerated cellulose fibers, which comprises adding an amine-substituted cellulose derivative to a viscose dope or to an alkali cellulose and spinning fibers by the viscose spinning process, or adding said cellulose derivative to a cellulose solution and spinning fibers from the solution, processing fibers into a woven or knitted fabric and dyeing the fabric with a direct or acid dye in the absence of additional electrolyte salt.