Verfahren zum kontinuierlichen Färben oder Bedrucken von Cellulose-Substraten mit dispergierten Schwefelfarbstoffen

PURPOSE: To provide a dyeing method for obtaining a uniformly dyed product by continuously applying an aqueous dispersed liquid of a sulfur dye to a substrate by simultaneously and/or subsequently applying a reducing sugar together with alkali thereto, and by subjecting it to heat reduction to preve...

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Bibliographic Details
Main Author MESZAROS, LASZLO A
Format Patent
LanguageGerman
Published 29.04.1994
Edition5
Subjects
DYEING LEATHER, FURS, OR SOLID MACROMOLECULAR SUBSTANCES INANY FORM
DYEING OR PRINTING TEXTILES
FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
LAUNDERING
TEXTILES
TREATMENT OF TEXTILES OR THE LIKE
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Summary:PURPOSE: To provide a dyeing method for obtaining a uniformly dyed product by continuously applying an aqueous dispersed liquid of a sulfur dye to a substrate by simultaneously and/or subsequently applying a reducing sugar together with alkali thereto, and by subjecting it to heat reduction to prevent e.g. tailing. CONSTITUTION: This method is to apply a continuous dyeing method of e.g. a pad steam dyeing method or pad dry pad steam dyeing method to a substrate comprising a cellulose fiber by employing an aqueous dispersed liquid of sulfur dye using a dispersant of e.g. lignin sulfonate, wherein it is specifically conducted by applying a disperse liquid at 20 to 60 deg.C comprising an alkaline agent (e.g. sodium hydride) and reducing sugar (pref. D-glucose) in the ratio of 50 to 90 g/to the substrate via padding, steam-heating the base material up to 98 to 105 deg.C for reducing the dye, thus dyeing, it, and then oxidizing it for coloring. The method enables any sulfur dye to carry out a continuous dyeing without any listing or tailing.
Bibliography:Application Number: CH19890003133