METHOD FOR DYEING TEXILE MATERIALS MADE OF WOOL AND POLYESTER FIBRES

Because the high dyeing temperatures employed necessitate the use of formaldehyde as customary wool-protecting agent and because of the resulting sealing problems on jet-dyeing machines, an HT dyeing of polyester fibre/wool blends cannot be carried out without polluting the environment. If, however,...

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Bibliographic Details
Main Author VON DER ELTZ, HANS-ULRICH
Format Patent
LanguageEnglish
German
Published 19.09.1990
Subjects
DYEING LEATHER, FURS, OR SOLID MACROMOLECULAR SUBSTANCES INANY FORM
DYEING OR PRINTING TEXTILES
FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
LAUNDERING
TEXTILES
TREATING TEXTILE MATERIALS BY LIQUIDS, GASES OR VAPOURS
TREATMENT OF TEXTILES OR THE LIKE
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Summary:Because the high dyeing temperatures employed necessitate the use of formaldehyde as customary wool-protecting agent and because of the resulting sealing problems on jet-dyeing machines, an HT dyeing of polyester fibre/wool blends cannot be carried out without polluting the environment. If, however, to achieve this purpose, lower temperatures are employed and the consequently required carriers are added directly to the dyeing liquor, this in turn gives rise to levelness problems and fastness reductions on the wool portion of the textile material. It has now been found according to the invention that by metering the carrier under isothermal conditions into the dyeing after 10-20 minutes via the gas stream driving the textile material it is possible to obtain a homogeneous distribution thereof and its full effectiveness without fastness losses. The dyeing can be completed 10-30 minutes later. All the advantages of jet dyeing are fully retained in this process.
Bibliography:Application Number: EP19870112387